**Attachment 1**

**Part 1: Fire Protection SDP Phase 1 Worksheet**

**Facility:**
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

**Performance
Issue:**\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

**Step 1.1**

Assign a finding category: O Cold Shutdown

> O Fire Prevention and Administrative Controls
>
> O Fixed Fire Protection Systems
>
> O Fire Confinement
>
> O Localized Cable or Component Protection
>
> O Post-fire SSD

Basis for selection/comments:
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

**Step 1.2**

Assign a degradation rating: O Low

O Moderate

> O Moderate A (applies only to Fire Confinement and Localized Cable or
> Component Protection Issues)
>
> O Moderate B (applies only to Fire Confinement and Localized Cable or
> Component Protection Issues)

O High

Basis for selection/comments:
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

**Step 1.3**

[Task 1.3.1: Qualitative Screening for All Finding
Categories]{.underline}

Question 1: Was the finding assigned a Low degradation rating?

> O Yes -- Screens to Green, no further analysis required

O No -- Continue to next question

Question 2: Does the finding only affect ability to reach and maintain
cold shutdown conditions?

O Yes - Screen to Green, no further analysis required

> O No -- Continue to Step 1.4, unless the finding category was "Fire
> Confinement," in which case, proceed to Task 1.3.2

[Task 1.3.2: Supplemental Screening for Fire Confinement
Findings]{.underline}

If the finding category assigned in Step 1.1 is "Fire Confinement" and
the degradation rating assigned in Step 1.2 is "Moderate," perform a
supplemental qualitative screening check based on the following
questions. Otherwise, proceed to Step 1.4.

Question 1: Will the barrier in its degraded condition provide a 2-hour
or greater fire endurance rating?

> O Yes -- Screens to Green, no further analysis required

O No -- Continue to next question

Question 2: Is there a non-degraded automatic gaseous room-flooding fire
suppression system in the exposing fire area?

> O Yes -- Screen to Green, no further analysis required
>
> O No -- Continue to next question

Question 3: Is there a non-degraded or no more than moderately degraded
automatic full area water-based fire suppression system in the exposing
fire area?

> O Yes -- Screen to Green, no further analysis required
>
> O No -- Continue to next question

Question 4: Can it be determined that the exposed fire area contain no
potential damage targets that are unique from those in the exposing fire
area (damage targets may include post-fire safe shutdown components or
other plant components whose loss might lead to a demand for safe
shutdown (e.g., a plant trip))?

> O Yes -- Screen to Green, no further analysis required
>
> O No -- Continue to next question

Question 5: Are all potential damage targets in the exposed fire area
(as described in question 4) provided with passive fire barrier
protection with no more than a moderate degradation that will provide a
minimum of 20 minutes fire endurance?

> O Yes -- Screen to Green, no further analysis required
>
> O No -- Continue to next question

Question 6: Is a non-degraded or no more than moderately degraded
partial-coverage automatic water based fire suppression system installed
in the exposing fire area and are all the fixed or *in-situ* fire
ignition sources included within the zone of coverage for this system?

> O Yes -- Screen to Green, no further analysis required
>
> O No -- Continue to next question

Question 7: Does the degraded barrier provide a minimum of 20 minutes
fire endurance protection and are the fixed or *in situ* fire ignition
sources and combustible or flammable materials positioned such that,
even considering fire spread to secondary combustibles, the degraded
barrier or barrier element will not be subject to direct flame
impingement?

> O Yes -- Screen to Green, no further analysis required
>
> O No -- Continue to Step 1.4

**Step 1.4 - Initial Quantitative Screening**

[Task 1.4.1: Assign a duration factor (DF)]{.underline}

> O \< 3 Days (0.01)

O 3 -- 30 Days (0.10)

O \> 30 Days (1.00)

[Task 1.4.2: Estimate the fire frequency for the fire area (from Generic
Fire Area]{.underline}

[Fire Frequency Table)]{.underline}

  ----------------------------------------------------- ----------------------
  AREA                                                  F [~Area~]{.smallcaps}

                                                        

                                                        

                                                        

  (ΣF [~Area~]{.smallcaps} ) =                          
  ----------------------------------------------------- ----------------------

[Task 1.4.3: Screening Check]{.underline}

Number range CHAPTER![](media/image1.wmf) \_\_\_\_\_\_\_\_\_\_\_

+------------------------------------------+-------------+-------------+
| Number range CHAPTER**Table A1.1 - Phase |             |             |
| 1 Quantitative Screening Criteria**      |             |             |
+------------------------------------------+-------------+-------------+
| **Assigned Finding Category (from Step   | **ΔCDF~1.4~ |             |
| 1.1):**                                  | Screening   |             |
|                                          | Criteria**  |             |
+------------------------------------------+-------------+-------------+
|                                          | **Moderate  | **High**    |
|                                          | De          |             |
|                                          | gradation** | **De        |
|                                          |             | gradation** |
+------------------------------------------+-------------+-------------+
| Fire Prevention and Administrative       | N/A         | 1E-6        |
| Controls                                 |             |             |
+------------------------------------------+-------------+-------------+
| Fixed Fire Protection Systems            | 1E-5        |             |
+------------------------------------------+-------------+-------------+
| Fire Confinement                         | 1E-5        |             |
+------------------------------------------+-------------+-------------+
| Localized Cable or Component Protection  | 1E-5        |             |
+------------------------------------------+-------------+-------------+
| Post-fire SSD                            | 1E-6        |             |
+------------------------------------------+-------------+-------------+

O Δ CDF~1.4~ is lower than the corresponding value in Table A1.1 - the
finding screens to Green and the analysis is complete (no Phase 2
analysis is required)

O Δ CDF~1.4~ is greater than or equal to the corresponding value in
Table A1.1 - the finding does not screen to Green, and the analysis
continues to Phase 2

**Part 2: Fire Protection SDP Phase 2 Worksheet**

**Facility:**
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

Results from FP SDP Phase 1 Review:
![](media/image2.wmf)~\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_~

Request and review the following licensee documents:

-   The fire hazards analysis for the fire areas to be evaluated

-   The post-fire safe shutdown analysis for the fire areas to be
    evaluated

-   The licensee's lists of required and associated circuits

-   Post-fire operating procedures applicable to the fire areas to be
    assessed

-   Documentation for any USNRC approved deviations or exemptions
    relevant to the fire areas to be assessed.

**Step 2.1 - Independent SSD Path First Screening Assessment**

[Task 2.1.1: Identify the Designated Post-fire SSD Path]{.underline}

The identified SSD path must meet the following criteria in order to be
considered at this stage of the Phase 2 analysis:

-   The SSD path must be identified as the designated post-fire SSD path
    in the plant's fire protection program.

-   The SSD path must be supported by a documented post-fire SSD
    analysis consistent with regulatory requirements.

-   Use of the SSD path must be documented and included in the plant
    operating procedures.

SSD Path:

[Task 2.1.2: Assess the Unavailability Factor for the Identified SSD
Path]{.underline}

CCDP~2.1.2~ = (SSD Unavailability Factor) = \_\_\_\_\_\_\_ (Credited as
either 1.0, 0.1, or 0.01)

Basis for selection/comments:

\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

If CCDP~2.1.2~ = 1.0, proceed to Step 2.2.

[Task 2.1.3: Assess Independence of the Identified SSD Path]{.underline}

Criteria satisfied:CCDP~2.1.3~ = CCDP~2.1.2~ = (SSD Unavailability
Factor)

Criteria not satisfied:CCDP~2.1.3~ = 1.0. Proceed to Step 2.2

Basis for criteria not met/comments:

\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

[Task 2.1.4.: Screening Check]{.underline}

![](media/image3.wmf)~\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_~

+-----------------------------------------+--------------+------------+
| Number range CHAPTER**Table A1.2 -      |              |            |
| Phase 2 Screening Step 1 Quantitative   |              |            |
| Screening Criteria**                    |              |            |
+-----------------------------------------+--------------+------------+
| **Assigned Finding Category (from Step  | **Δ CDF~2.1~ |            |
| 1.1):**                                 | Screening    |            |
|                                         | Value**      |            |
+-----------------------------------------+--------------+------------+
|                                         | **Moderate   | **High**   |
|                                         | D            |            |
|                                         | egradation** | **Deg      |
|                                         |              | radation** |
+-----------------------------------------+--------------+------------+
| Fire Prevention and Administrative      | N/A          | 1E-6       |
| Controls                                |              |            |
+-----------------------------------------+--------------+------------+
| Fixed Fire Protection Systems           | 1E-5         |            |
+-----------------------------------------+--------------+------------+
| Fire Confinement                        | 1E-5         |            |
+-----------------------------------------+--------------+------------+
| Localized Cable or Component Protection | 1E-5         |            |
+-----------------------------------------+--------------+------------+
| Post-fire SSD                           | 1E-6         |            |
+-----------------------------------------+--------------+------------+

-   Δ CDF~2.1~ is lower than the corresponding value in Table A1.2 - the
    finding screens to Green and the analysis is complete.

-   Δ CDF~2.1~ is greater than or equal to the corresponding value in
    Table A1.2. The analysis continues to Step 2.2

**Step 2.2 - Fire Damage State Determination**

[Task 2.2.1: Initial FDS Assignment]{.underline}

(Check all that apply from O FDS1

Appendix F, Table 2.2.1) O FDS2

> O FDS2

Basis for selection (s)/FDS3 assessment/comments:

[Task 2.2.2: Screening Assessment for FDS3 Scenarios]{.underline}

If the finding category assigned in Step 1.1 is "Fire Confinement,"
retain the FDS3 scenarios and continue the analysis with Step 2.3. For
all other finding categories, conduct a screening check for the FDS3
scenarios based on the following questions:

Question 1: Does the fire barrier separating the exposed and the
exposing fire areas have a non-degraded 2-hour or greater fire endurance
rating?

> O Yes -- FDS3 scenarios screen out, continue to Step 2.3.

O No -- Continue to next question

Question 2: Is there a non-degraded automatic gaseous room-flooding fire
suppression system [either]{.underline} in the exposed [or]{.underline}
in the exposing fire area?

> O Yes -- FDS3 scenarios screen out, continue to Step 2.3.

O No -- Continue to next question

Question 3: Is there a non-degraded [or]{.underline} no more than
moderately degraded automatic full area water-based fire suppression
system [either]{.underline} in the exposed [or]{.underline} in the
exposing fire area?

> O Yes -- FDS3 scenarios screen out, continue to Step 2.3.

O No -- Continue to next question

Question 4: Can it be determined that the exposed fire area contain no
potential damage targets that are unique from those in the exposing fire
area (damage targets may include post-fire safe shutdown components or
other plant components whose loss might lead to a demand for safe
shutdown (e.g., a plant trip))?

> O Yes -- FDS3 scenarios screen out, continue to Step 2.3.

O No -- Continue to next question

Question 5: If the exposed fire area [does]{.underline} contain
post-fire safe shutdown components [or]{.underline} components whose
fire-induced failure might lead to a demand for safe shutdown, are all
such components located at least 20 feet from the intervening fire
barrier, and/or provided with passive fire protection with a minimum
one-hour fire endurance rating?

> O Yes -- FDS3 scenarios screen out, continue to Step 2.3.

O No -- Continue to next question

Question 6: Is a partial-coverage automatic water based fire suppression
system installed in the exposing fire area [and]{.underline} are all the
fixed or *in-situ* fire ignition sources included within the zone of
coverage for this system?

> O Yes -- FDS3 scenarios screen out, continue to Step 2.3.

O No -- Continue to next question

Question 7: Does the fire barrier provide a minimum of 20 minutes fire
endurance protection [and]{.underline} are the fixed or *in situ* fire
ignition sources and combustible or flammable materials in the exposing
fire area positioned such that, even considering fire spread to
secondary combustibles, the barrier will not be subject to direct flame
impingement?

> O Yes -- FDS3 scenarios screen out, continue to Step 2.3.
>
> O No -- Retain the FDS3 scenarios and continue the analysis with Step
> 2.3.

**Step 2.3 - Fire Scenario Identification and Ignition Source
Screening**

[Task 2.3.1: Identify and Count Fire Ignition Sources]{.underline}

(Use the worksheet on the following pages)

+-----------+--------+----+-----+-----+-----------------------+-----+
| Number    |        |    |     |     |                       |     |
| range     |        |    |     |     |                       |     |
| CHAPT     |        |    |     |     |                       |     |
| ER**Table |        |    |     |     |                       |     |
| A1.3 -    |        |    |     |     |                       |     |
| Fire      |        |    |     |     |                       |     |
| Frequency |        |    |     |     |                       |     |
| E         |        |    |     |     |                       |     |
| valuation |        |    |     |     |                       |     |
| Wo        |        |    |     |     |                       |     |
| rksheet** |        |    |     |     |                       |     |
+===========+========+====+=====+=====+=======================+=====+
| **Nuclear |        |    |     |     |                       |     |
| Power     |        |    |     |     |                       |     |
| Plant:**  |        |    |     |     |                       |     |
+-----------+--------+----+-----+-----+-----------------------+-----+
| **De      |        |    |     |     |                       |     |
| scription |        |    |     |     |                       |     |
| of the    |        |    |     |     |                       |     |
| Plant     |        |    |     |     |                       |     |
| Area of   |        |    |     |     |                       |     |
| In        |        |    |     |     |                       |     |
| terest:** |        |    |     |     |                       |     |
+-----------+--------+----+-----+-----+-----------------------+-----+
| **Ide     |        |    |     |     |                       |     |
| ntifier/D |        |    |     |     |                       |     |
| esignator |        |    |     |     |                       |     |
| of the    |        |    |     |     |                       |     |
| Plant     |        |    |     |     |                       |     |
| Area:**   |        |    |     |     |                       |     |
+-----------+--------+----+-----+-----+-----------------------+-----+
| *         |        | ** | **I | **A | **Comments**          | **A |
| *Ignition |        | \# | ndi | sso |                       | sso |
| Source    |        | of | vid | cia |                       | cia |
| Bin**     |        | I  | ual | ted |                       | ted |
|           |        | te | B   | Fr  |                       | HHR |
|           |        | ms | ase | equ |                       | s** |
|           |        | or | F   | enc |                       |     |
|           |        | ** | ire | y** |                       |     |
|           |        |    | Fr  |     |                       |     |
|           |        | *  | equ |     |                       |     |
|           |        | *L | enc |     |                       |     |
|           |        | ev | y** |     |                       |     |
|           |        | el |     |     |                       |     |
|           |        | ** |     |     |                       |     |
+-----------+--------+----+-----+-----+-----------------------+-----+
| *         |        |    | 1   |     |                       | I   |
| *Cables - |        |    | .6E |     |                       | nit |
| Non-Qu    |        |    | -05 |     |                       | ial |
| alified** |        |    | /4. |     |                       | 7   |
|           |        |    | 8E- |     |                       | 0kW |
| (Low/Med  |        |    | 04/ |     |                       |     |
| ium/High) |        |    |     |     |                       | See |
| (See      |        |    | 1   |     |                       |     |
| A         |        |    | .4E |     |                       | At  |
| ttachment |        |    | -03 |     |                       | tac |
| 4)        |        |    |     |     |                       | hme |
|           |        |    |     |     |                       | nts |
|           |        |    |     |     |                       | 3   |
|           |        |    |     |     |                       | and |
|           |        |    |     |     |                       | 5   |
+-----------+--------+----+-----+-----+-----------------------+-----+
| **E       |        |    |     |     |                       |     |
| lectrical |        |    |     |     |                       |     |
| Ca        |        |    |     |     |                       |     |
| binets:** |        |    |     |     |                       |     |
+-----------+--------+----+-----+-----+-----------------------+-----+
| S         | T      |    | 5   |     |                       | 70  |
| witchgear | hermal |    | .5E |     |                       | kW, |
| Cabinets  |        |    | -05 |     |                       | 20  |
|           |        |    |     |     |                       | 0kW |
+-----------+--------+----+-----+-----+-----------------------+-----+
|           | High   |    | 4   |     |                       | See |
|           | Energy |    | .7E |     |                       |     |
|           |        |    | -06 |     |                       | A   |
|           |        |    |     |     |                       | tta |
|           |        |    |     |     |                       | chm |
|           |        |    |     |     |                       | ent |
|           |        |    |     |     |                       | 5   |
+-----------+--------+----+-----+-----+-----------------------+-----+
| General   |        |    | 6   |     |                       | 70  |
| E         |        |    | .0E |     |                       | kW, |
| lectrical |        |    | -05 |     |                       | 20  |
| Cabinets  |        |    |     |     |                       | 0kW |
+-----------+--------+----+-----+-----+-----------------------+-----+
| General   |        |    | 6   |     |                       | 200 |
| Control   |        |    | .0E |     |                       | kW, |
| Cabinets  |        |    | -05 |     |                       | 65  |
|           |        |    |     |     |                       | 0kW |
+-----------+--------+----+-----+-----+-----------------------+-----+
| MCR and   |        |    | 4   |     |                       | 200 |
| MCR       |        |    | .8E |     |                       | kW, |
| Service   |        |    | -03 |     |                       | 65  |
| Cabinets  |        |    |     |     |                       | 0kW |
+-----------+--------+----+-----+-----+-----------------------+-----+
| *         |        |    |     |     |                       |     |
| *Electric |        |    |     |     |                       |     |
| Motors:** |        |    |     |     |                       |     |
+-----------+--------+----+-----+-----+-----------------------+-----+
| Electric  |        |    | 6   |     |                       | 70  |
| Motors    |        |    | .5E |     |                       | kW, |
| (\<100HP) |        |    | -04 |     |                       | 20  |
|           |        |    |     |     |                       | 0kW |
+-----------+--------+----+-----+-----+-----------------------+-----+
| Electric  |        |    | 6   |     |                       | 200 |
| Motors    |        |    | .5E |     |                       | kW, |
| (**       |        |    | -04 |     |                       | 65  |
| ≥**100HP) |        |    |     |     |                       | 0kW |
+-----------+--------+----+-----+-----+-----------------------+-----+
| **Gen     |        |    |     |     |                       |     |
| erators - |        |    |     |     |                       |     |
| G         |        |    |     |     |                       |     |
| eneral:** |        |    |     |     |                       |     |
+-----------+--------+----+-----+-----+-----------------------+-----+
| Diesel    |        |    | 5   |     |                       | 70  |
| G         |        |    | .6E |     |                       | kW, |
| enerators |        |    | -03 |     |                       | 20  |
|           |        |    |     |     |                       | 0kW |
+-----------+--------+----+-----+-----+-----------------------+-----+
| Gas       |        |    | 3   |     |                       | 70  |
| Turbine   |        |    | .2E |     |                       | kW, |
| G         |        |    | -04 |     |                       | 20  |
| enerators |        |    |     |     |                       | 0kW |
+-----------+--------+----+-----+-----+-----------------------+-----+
| Reactor   |        |    | 6   |     |                       | 70  |
| P         |        |    | .7E |     |                       | kW, |
| rotection |        |    | -04 |     |                       | 20  |
| System MG |        |    |     |     |                       | 0kW |
| Sets      |        |    |     |     |                       |     |
+-----------+--------+----+-----+-----+-----------------------+-----+

+-----------+--------+----+-----+-----+-----------------------+-----+
| *         |        | ** | **I | **A | **Comments**          | **A |
| *Ignition |        | \# | ndi | sso |                       | sso |
| Source    |        | of | vid | cia |                       | cia |
| Bin**     |        | i  | ual | ted |                       | ted |
|           |        | te | B   | Fr  |                       | HHR |
|           |        | ms | ase | equ |                       | s** |
|           |        | or | Fir | enc |                       |     |
|           |        | ** | e** | y** |                       |     |
+-----------+--------+----+-----+-----+-----------------------+-----+
| *         |        |    |     |     |                       |     |
| *Hydrogen |        |    |     |     |                       |     |
| S         |        |    |     |     |                       |     |
| ources:** |        |    |     |     |                       |     |
+-----------+--------+----+-----+-----+-----------------------+-----+
| Hydrogen  |        |    | 5   |     |                       | See |
| R         |        |    | .5E |     |                       |     |
| ecombiner |        |    | -03 |     |                       | A   |
| (BWR)     |        |    |     |     |                       | tta |
|           |        |    |     |     |                       | chm |
|           |        |    |     |     |                       | ent |
|           |        |    |     |     |                       | 5   |
+-----------+--------+----+-----+-----+-----------------------+-----+
| Hydrogen  |        |    | 6   |     |                       | See |
| Storage   |        |    | .5E |     |                       |     |
| Tanks     |        |    | -04 |     |                       | A   |
| (Yes /    |        |    |     |     |                       | tta |
| No)       |        |    |     |     |                       | chm |
|           |        |    |     |     |                       | ent |
|           |        |    |     |     |                       | 5   |
+-----------+--------+----+-----+-----+-----------------------+-----+
| Hydrogen  |        |    | 9   |     |                       | See |
| Piping -  |        |    | .7E |     |                       |     |
| Charged   |        |    | -04 |     |                       | A   |
| (Yes /    |        |    |     |     |                       | tta |
| No)       |        |    |     |     |                       | chm |
|           |        |    |     |     |                       | ent |
|           |        |    |     |     |                       | 5   |
+-----------+--------+----+-----+-----+-----------------------+-----+
| **Hot     |        |    | 2   |     |                       | See |
| Work**    |        |    | .3E |     |                       |     |
| (Low/Med  |        |    | -05 |     |                       | A   |
| ium/High) |        |    | /6. |     |                       | tta |
|           |        |    | 9E- |     |                       | chm |
| (See      |        |    | 05/ |     |                       | ent |
| A         |        |    |     |     |                       | 5   |
| ttachment |        |    | 6   |     |                       |     |
| 4)        |        |    | .9E |     |                       |     |
|           |        |    | -04 |     |                       |     |
+-----------+--------+----+-----+-----+-----------------------+-----+
| **Main    |        |    |     |     |                       |     |
| Turbine-  |        |    |     |     |                       |     |
| Generator |        |    |     |     |                       |     |
| Set:**    |        |    |     |     |                       |     |
+-----------+--------+----+-----+-----+-----------------------+-----+
| T/G       |        |    | 1   |     |                       | 70  |
| Exciter   |        |    | .4E |     |                       | kW, |
| Fire (Yes |        |    | -03 |     |                       | 20  |
| / No)     |        |    |     |     |                       | 0kW |
+-----------+--------+----+-----+-----+-----------------------+-----+
| T/G Oil   |        |    | 1   |     |                       | See |
| Fires     |        |    | .7E |     |                       |     |
| (Yes /    |        |    | -03 |     |                       | A   |
| No)       |        |    |     |     |                       | tta |
|           |        |    |     |     |                       | chm |
|           |        |    |     |     |                       | ent |
|           |        |    |     |     |                       | 5   |
+-----------+--------+----+-----+-----+-----------------------+-----+
| T/G       |        |    | 1   |     |                       | See |
| Hygrogen  |        |    | .4E |     |                       |     |
| Fire (Yes |        |    | -03 |     |                       | A   |
| / No)     |        |    |     |     |                       | tta |
|           |        |    |     |     |                       | chm |
|           |        |    |     |     |                       | ent |
|           |        |    |     |     |                       | 5   |
+-----------+--------+----+-----+-----+-----------------------+-----+
| **Misc    |        |    |     |     |                       |     |
| ellaneous |        |    |     |     |                       |     |
| Comp      |        |    |     |     |                       |     |
| onents:** |        |    |     |     |                       |     |
+-----------+--------+----+-----+-----+-----------------------+-----+
| Air       | Motor  |    | 1   |     |                       | 70  |
| Co        | Fire   |    | .5E |     |                       | kW, |
| mpressors |        |    | -04 |     |                       | 20  |
| (\<100HP) |        |    |     |     |                       | 0kW |
+-----------+--------+----+-----+-----+-----------------------+-----+
|           | Oil    |    | 1   |     |                       | See |
|           | Fire   |    | .0E |     |                       |     |
|           |        |    | -04 |     |                       | A   |
|           |        |    |     |     |                       | tta |
|           |        |    |     |     |                       | chm |
|           |        |    |     |     |                       | ent |
|           |        |    |     |     |                       | 5   |
+-----------+--------+----+-----+-----+-----------------------+-----+
| Air       | Motor  |    | 1   |     |                       | 200 |
| Co        | Fire   |    | .5E |     |                       | kW, |
| mpressors |        |    | -04 |     |                       | 65  |
| (≥100HP)  |        |    |     |     |                       | 0kW |
+-----------+--------+----+-----+-----+-----------------------+-----+
|           | Oil    |    | 1   |     |                       | See |
|           | Fire   |    | .0E |     |                       |     |
|           |        |    | -04 |     |                       | A   |
|           |        |    |     |     |                       | tta |
|           |        |    |     |     |                       | chm |
|           |        |    |     |     |                       | ent |
|           |        |    |     |     |                       | 5   |
+-----------+--------+----+-----+-----+-----------------------+-----+
| Battery   |        |    | 1   |     |                       | 70  |
| Banks     |        |    | .9E |     |                       | kW, |
|           |        |    | -04 |     |                       | 20  |
|           |        |    |     |     |                       | 0kW |
+-----------+--------+----+-----+-----+-----------------------+-----+
| Boiler    |        |    | 9   |     |                       | See |
| Heating   |        |    | .7E |     |                       |     |
| Units     |        |    | -04 |     |                       | A   |
|           |        |    |     |     |                       | tta |
|           |        |    |     |     |                       | chm |
|           |        |    |     |     |                       | ent |
|           |        |    |     |     |                       | 5   |
+-----------+--------+----+-----+-----+-----------------------+-----+
| Electric  |        |    | 5   |     |                       | 70  |
| Dryers    |        |    | .4E |     |                       | kW, |
|           |        |    | -04 |     |                       | 20  |
|           |        |    |     |     |                       | 0kW |
+-----------+--------+----+-----+-----+-----------------------+-----+
| Ve        |        |    | 6   |     |                       | 70  |
| ntilation |        |    | .0E |     |                       | kW, |
| S         |        |    | -05 |     |                       | 20  |
| ubsystems |        |    |     |     |                       | 0kW |
+-----------+--------+----+-----+-----+-----------------------+-----+

+-----------+--------+----+-----+-----+-----------------------+-----+
| *         |        | ** | **I | **A | **Comments**          | **A |
| *Ignition |        | \# | ndi | sso |                       | sso |
| Source    |        | of | vid | cia |                       | cia |
| Bin**     |        | I  | ual | ted |                       | ted |
|           |        | te | B   | Fr  |                       | HHR |
|           |        | ms | ase | equ |                       | s** |
|           |        | or | Fir | enc |                       |     |
|           |        | ** | e** | y** |                       |     |
+-----------+--------+----+-----+-----+-----------------------+-----+
| *         |        |    |     |     |                       |     |
| *Pumps:** |        |    |     |     |                       |     |
+-----------+--------+----+-----+-----+-----------------------+-----+
| Reactor   | Motor  |    | 6   |     |                       | 200 |
| Coolant   | Fire   |    | .2E |     |                       | kW, |
| Pump      |        |    | -04 |     |                       | 60  |
| (PWR)     |        |    |     |     |                       | 0kW |
+-----------+--------+----+-----+-----+-----------------------+-----+
|           | Oil    |    | 3   |     |                       | See |
|           | Fire   |    | .1E |     |                       |     |
|           |        |    | -04 |     |                       | A   |
|           |        |    |     |     |                       | tta |
|           |        |    |     |     |                       | chm |
|           |        |    |     |     |                       | ent |
|           |        |    |     |     |                       | 5   |
+-----------+--------+----+-----+-----+-----------------------+-----+
| Reactor   | Motor  |    | 8   |     |                       | 200 |
| Feed Pump | Fire   |    | .4E |     |                       | kW, |
| (BWR)     |        |    | -05 |     |                       | 65  |
|           |        |    |     |     |                       | 0kW |
+-----------+--------+----+-----+-----+-----------------------+-----+
|           | Oil    |    | 8   |     |                       | See |
|           | Fire   |    | .4E |     |                       |     |
|           |        |    | -04 |     |                       | A   |
|           |        |    |     |     |                       | tta |
|           |        |    |     |     |                       | chm |
|           |        |    |     |     |                       | ent |
|           |        |    |     |     |                       | 5   |
+-----------+--------+----+-----+-----+-----------------------+-----+
| Main      | Motor  |    | 2   |     |                       | 200 |
| Feedwater | Fire   |    | .7E |     |                       | kW, |
| Pumps     |        |    | -04 |     |                       | 65  |
|           |        |    |     |     |                       | 0kW |
+-----------+--------+----+-----+-----+-----------------------+-----+
|           | Oil    |    | 2   |     |                       | See |
|           | Fire   |    | .7E |     |                       |     |
|           |        |    | -03 |     |                       | A   |
|           |        |    |     |     |                       | tta |
|           |        |    |     |     |                       | chm |
|           |        |    |     |     |                       | ent |
|           |        |    |     |     |                       | 5   |
+-----------+--------+----+-----+-----+-----------------------+-----+
| Other     | Motor  |    | 5   |     |                       | 70  |
| Pumps     | Fire   |    | .0E |     |                       | kW, |
| (\<100HP) |        |    | -05 |     |                       | 20  |
|           |        |    |     |     |                       | 0kW |
+-----------+--------+----+-----+-----+-----------------------+-----+
|           | Oil    |    | 5   |     |                       | See |
|           | Fire   |    | .0E |     |                       |     |
|           |        |    | -05 |     |                       | A   |
|           |        |    |     |     |                       | tta |
|           |        |    |     |     |                       | chm |
|           |        |    |     |     |                       | ent |
|           |        |    |     |     |                       | 5   |
+-----------+--------+----+-----+-----+-----------------------+-----+
| Other     | Motor  |    | 5   |     |                       | 200 |
| Pumps     | Fire   |    | .0E |     |                       | kW, |
| (≥100HP)  |        |    | -05 |     |                       | 65  |
|           |        |    |     |     |                       | 0kW |
+-----------+--------+----+-----+-----+-----------------------+-----+
|           | Oil    |    | 5   |     |                       | See |
|           | Fire   |    | .0E |     |                       |     |
|           |        |    | -05 |     |                       | A   |
|           |        |    |     |     |                       | tta |
|           |        |    |     |     |                       | chm |
|           |        |    |     |     |                       | ent |
|           |        |    |     |     |                       | 5   |
+-----------+--------+----+-----+-----+-----------------------+-----+
| **Transf  |        |    |     |     |                       |     |
| ormers:** |        |    |     |     |                       |     |
+-----------+--------+----+-----+-----+-----------------------+-----+
| Trans     |        |    | 4   |     |                       | 650 |
| formers - |        |    | .2E |     |                       | kW, |
| Out       |        |    | -03 |     |                       | 1   |
| door/Yard |        |    |     |     |                       | 0MW |
+-----------+--------+----+-----+-----+-----------------------+-----+
| Trans     |        |    | 1   |     |                       | 70  |
| formers - |        |    | .1E |     |                       | kW, |
| Indoor    |        |    | -04 |     |                       | 20  |
| Dry       |        |    |     |     |                       | 0kW |
+-----------+--------+----+-----+-----+-----------------------+-----+
| Trans     |        |    | 1   |     |                       | 650 |
| formers - |        |    | .1E |     |                       | kW, |
| Indoor    |        |    | -04 |     |                       | 2MW |
| O         |        |    |     |     |                       |     |
| il-Filled |        |    |     |     |                       |     |
+-----------+--------+----+-----+-----+-----------------------+-----+
| **Tra     |        |    | 5   |     |                       | 70  |
| nsients** |        |    | .5E |     |                       | kW, |
| (Low/Med  |        |    | -05 |     |                       | 20  |
| ium/High) |        |    | /1. |     |                       | 0kW |
|           |        |    | 7E- |     |                       |     |
| (See      |        |    | 04/ |     |                       | or  |
| A         |        |    |     |     |                       | See |
| ttachment |        |    | 1   |     |                       |     |
| 4)        |        |    | .7E |     |                       | A   |
|           |        |    | -03 |     |                       | tta |
|           |        |    |     |     |                       | chm |
|           |        |    |     |     |                       | ent |
|           |        |    |     |     |                       | 5   |
+-----------+--------+----+-----+-----+-----------------------+-----+

[Task 2.3.2: Characterize Fire Ignition Sources]{.underline} and

[Task 2.3.3: Identify Nearest and Most Vulnerable Ignition or Damage
Targets]{.underline}

[Task 2.3.4: Fire Ignition Source Screening]{.underline} (Using
NUREG-1805 or Zone of Influence Chart)

**Table A1.4**

<table style="width:100%;">
<colgroup>
<col style="width: 4%" />
<col style="width: 21%" />
<col style="width: 7%" />
<col style="width: 9%" />
<col style="width: 7%" />
<col style="width: 19%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 5%" />
<col style="width: 9%" />
</colgroup>
<tbody>
<tr class="odd">
<td rowspan="2">Source#</td>
<td rowspan="2"><p><strong>Source -</strong></p>
<p><strong>Description/Location</strong></p></td>
<td rowspan="2"><strong>Number of Sources</strong></td>
<td><p><strong>From Table A1.3</strong></p>
<p><strong>Expected HRR</strong></p></td>
<td rowspan="2"><strong>Severity Factor (SF<sub>i</sub>)</strong></td>
<td rowspan="2"><strong><sub>Identify Nearest Target</sub></strong></td>
<td colspan="2" rowspan="2"><p><strong><sub>Target Distance
(ft)</sub></strong></p>
<p><strong><sub>H R</sub></strong></p></td>
<td colspan="2" rowspan="2"><p><strong><sub>Critical</sub></strong></p>
<p><strong><sub>Distance (ft) (from Tables 2.3.2 thru
2.3.4)</sub></strong></p>
<p><strong><sub>H R</sub></strong></p></td>
<td rowspan="2"><strong><sub>Number of Sources Retained (i.e., Did not
screen out)</sub></strong></td>
</tr>
<tr class="even">
<td><strong><sub>High Confidence HRR</sub></strong></td>
</tr>
<tr class="odd">
<td rowspan="2"></td>
<td rowspan="2"></td>
<td rowspan="2"></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td rowspan="2"></td>
<td rowspan="2"></td>
<td rowspan="2"></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td rowspan="2"></td>
<td rowspan="2"></td>
<td rowspan="2"></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td rowspan="2"></td>
<td rowspan="2"></td>
<td rowspan="2"></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td rowspan="2"></td>
<td rowspan="2"></td>
<td rowspan="2"></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td rowspan="2"></td>
<td rowspan="2"></td>
<td rowspan="2"></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
</tbody>
</table>

Fire Area Dimensions: Width(ft) Highest HRR for sources not retained:
\_\_\_\_\_\_kW

> Depth (ft) Does this HRR result in damaging hot gas layer?
>
> Height (ft) ○ Yes ○ No If yes, retain scenario.

(Attach printouts of any spreadsheet calculations utilized from
NUREG-1805.)

[Task 2.3.5: Finding Screening Check]{.underline}

-   All identified fire ignition sources screened out in Task 2.3.4. The
    Phase 2 analysis is complete and the finding should be assigned a
    Green significance determination rating. Subsequent analysis tasks
    and steps need not be completed.

```{=html}
<!-- -->
```
-   One or more of the fire ignition sources is retained, even if only
    at the higher severity value. The analysis continues to Step 2.4.

**Step 2.4 - Fire Frequency for Unscreened Fire Sources**

[Task 2.4.1: Nominal Fire Frequency Estimation]{.underline}

[Task 2.4.2: Findings Quantified Based on Increase in Fire
Frequency]{.underline} and

[Task 2.4.3: Credit for Compensatory Measures that Reduce Fire
Frequency]{.underline}

(Use the worksheet on the following page)

+---+-----------------+-----+-----+-----+-----------+-------+-------+
| N |                 |     |     |     |           |       |       |
| u |                 |     |     |     |           |       |       |
| m |                 |     |     |     |           |       |       |
| b |                 |     |     |     |           |       |       |
| e |                 |     |     |     |           |       |       |
| r |                 |     |     |     |           |       |       |
| r |                 |     |     |     |           |       |       |
| a |                 |     |     |     |           |       |       |
| n |                 |     |     |     |           |       |       |
| g |                 |     |     |     |           |       |       |
| e |                 |     |     |     |           |       |       |
| C |                 |     |     |     |           |       |       |
| H |                 |     |     |     |           |       |       |
| A |                 |     |     |     |           |       |       |
| P |                 |     |     |     |           |       |       |
| T |                 |     |     |     |           |       |       |
| E |                 |     |     |     |           |       |       |
| R |                 |     |     |     |           |       |       |
| * |                 |     |     |     |           |       |       |
| * |                 |     |     |     |           |       |       |
| T |                 |     |     |     |           |       |       |
| a |                 |     |     |     |           |       |       |
| b |                 |     |     |     |           |       |       |
| l |                 |     |     |     |           |       |       |
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| A |                 |     |     |     |           |       |       |
| 1 |                 |     |     |     |           |       |       |
| . |                 |     |     |     |           |       |       |
| 5 |                 |     |     |     |           |       |       |
|   |                 |     |     |     |           |       |       |
| - |                 |     |     |     |           |       |       |
| S |                 |     |     |     |           |       |       |
| t |                 |     |     |     |           |       |       |
| e |                 |     |     |     |           |       |       |
| p |                 |     |     |     |           |       |       |
| 2 |                 |     |     |     |           |       |       |
| . |                 |     |     |     |           |       |       |
| 4 |                 |     |     |     |           |       |       |
| : |                 |     |     |     |           |       |       |
| F |                 |     |     |     |           |       |       |
| i |                 |     |     |     |           |       |       |
| r |                 |     |     |     |           |       |       |
| e |                 |     |     |     |           |       |       |
| F |                 |     |     |     |           |       |       |
| r |                 |     |     |     |           |       |       |
| e |                 |     |     |     |           |       |       |
| q |                 |     |     |     |           |       |       |
| u |                 |     |     |     |           |       |       |
| e |                 |     |     |     |           |       |       |
| n |                 |     |     |     |           |       |       |
| c |                 |     |     |     |           |       |       |
| y |                 |     |     |     |           |       |       |
| f |                 |     |     |     |           |       |       |
| o |                 |     |     |     |           |       |       |
| r |                 |     |     |     |           |       |       |
| U |                 |     |     |     |           |       |       |
| n |                 |     |     |     |           |       |       |
| s |                 |     |     |     |           |       |       |
| c |                 |     |     |     |           |       |       |
| r |                 |     |     |     |           |       |       |
| e |                 |     |     |     |           |       |       |
| e |                 |     |     |     |           |       |       |
| n |                 |     |     |     |           |       |       |
| e |                 |     |     |     |           |       |       |
| d |                 |     |     |     |           |       |       |
| F |                 |     |     |     |           |       |       |
| i |                 |     |     |     |           |       |       |
| r |                 |     |     |     |           |       |       |
| e |                 |     |     |     |           |       |       |
| S |                 |     |     |     |           |       |       |
| o |                 |     |     |     |           |       |       |
| u |                 |     |     |     |           |       |       |
| r |                 |     |     |     |           |       |       |
| c |                 |     |     |     |           |       |       |
| e |                 |     |     |     |           |       |       |
| s |                 |     |     |     |           |       |       |
| * |                 |     |     |     |           |       |       |
| * |                 |     |     |     |           |       |       |
+---+-----------------+-----+-----+-----+-----------+-------+-------+
| * | **Unscreened    | **  | **I | *   | **A       | *     | **Re  |
| * | Fire Source**   | Num | ndi | *Se | djustment | *Base | vised |
| S |                 | ber | vid | ver | Factor    | Freq  | Fire  |
| o | **at Specified  | of  | ual | ity | for Fire  | uency | Freq  |
| u | HRR Value**     | S   | B   | Fa  | Frequency | Inc   | uency |
| r |                 | our | ase | cto | Increase  | rease | for   |
| c |                 | ces | F   | r** | or        | \     | Unscr |
| e |                 | Re  | ire |     | Com       | *\*** | eened |
| \ |                 | tai | Fr  | *   | pensatory |       | Sou   |
| # |                 | ned | equ | *(S | Mea       |       | rce** |
| * |                 | (Ta | enc | F*~ | sures\*** |       |       |
| * |                 | ble | y** | i~* |           |       |       |
|   |                 | A   |     | )** | **(AF~i~  |       |       |
|   |                 | 1.4 | **  |     | ~2.4~)**  |       |       |
|   |                 | )** | (Ta | **  |           |       |       |
|   |                 |     | ble | (Ta |           |       |       |
|   |                 |     | A   | ble |           |       |       |
|   |                 |     | 1.3 | A   |           |       |       |
|   |                 |     | )** | 1.4 |           |       |       |
|   |                 |     |     | )** |           |       |       |
+---+-----------------+-----+-----+-----+-----------+-------+-------+
|   |                 |     |     |     |           |       |       |
+---+-----------------+-----+-----+-----+-----------+-------+-------+
|   |                 |     |     |     |           |       |       |
+---+-----------------+-----+-----+-----+-----------+-------+-------+
|   |                 |     |     |     |           |       |       |
+---+-----------------+-----+-----+-----+-----------+-------+-------+
|   |                 |     |     |     |           |       |       |
+---+-----------------+-----+-----+-----+-----------+-------+-------+
|   |                 |     |     |     |           |       |       |
+---+-----------------+-----+-----+-----+-----------+-------+-------+
|   |                 |     |     |     |           |       |       |
+---+-----------------+-----+-----+-----+-----------+-------+-------+
|   |                 |     |     |     |           |       |       |
+---+-----------------+-----+-----+-----+-----------+-------+-------+
|   |                 |     |     |     |           |       |       |
+---+-----------------+-----+-----+-----+-----------+-------+-------+
| ~ |                 |     |     |     |           |       |       |
| T |                 |     |     |     |           |       |       |
| o |                 |     |     |     |           |       |       |
| t |                 |     |     |     |           |       |       |
| a |                 |     |     |     |           |       |       |
| l |                 |     |     |     |           |       |       |
| ~ |                 |     |     |     |           |       |       |
| ! |                 |     |     |     |           |       |       |
| [ |                 |     |     |     |           |       |       |
| ] |                 |     |     |     |           |       |       |
| ( |                 |     |     |     |           |       |       |
| m |                 |     |     |     |           |       |       |
| e |                 |     |     |     |           |       |       |
| d |                 |     |     |     |           |       |       |
| i |                 |     |     |     |           |       |       |
| a |                 |     |     |     |           |       |       |
| / |                 |     |     |     |           |       |       |
| i |                 |     |     |     |           |       |       |
| m |                 |     |     |     |           |       |       |
| a |                 |     |     |     |           |       |       |
| g |                 |     |     |     |           |       |       |
| e |                 |     |     |     |           |       |       |
| 4 |                 |     |     |     |           |       |       |
| . |                 |     |     |     |           |       |       |
| w |                 |     |     |     |           |       |       |
| m |                 |     |     |     |           |       |       |
| f |                 |     |     |     |           |       |       |
| ) |                 |     |     |     |           |       |       |
+---+-----------------+-----+-----+-----+-----------+-------+-------+

> \* Adjustment Factor for Fire Frequency Increase applies only to "Fire
> Prevention and Administrative Controls" findings (see discussion under
> Task 2.4.2). Credit for Compensatory Measures applies only to
> transient or hot work sources (see discussion under Task 2.4.3).
>
> \*\* Base frequency increases apply only to "Fire Prevention and
> Administrative Controls" findings within the combustible controls
> programs (see discussion under Task 2.4.2).

Assumptions/Comments/Remarks:\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

![](media/image5.wmf)

> ![](media/image6.wmf)
> \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

[Task 2.4.4: Finding Screening Check]{.underline}

Compare the updated change in CDF value, given the newly calculated fire
frequency reflecting only the unscreened fire sources, with the values
in the table below.

+------------------------------------------+-------------+------------+
| Number range CHAPTER                     |             |            |
|                                          |             |            |
| **Table A1.6 - Phase 2, Screening Step 4 |             |            |
| Quantitative Screening Criteria**        |             |            |
+------------------------------------------+-------------+------------+
| **Assigned Finding Category (from Step   | **ΔCDF~2.4~ |            |
| 1.1):**                                  | screening   |            |
|                                          | value**     |            |
+------------------------------------------+-------------+------------+
|                                          | **Moderate  | **High     |
|                                          | De          | Deg        |
|                                          | gradation** | radation** |
+------------------------------------------+-------------+------------+
| Fire Prevention and Administrative       | N/A         | 1E-6       |
| Controls                                 |             |            |
+------------------------------------------+-------------+------------+
| Fixed Fire Protection Systems            | 1E-5        |            |
+------------------------------------------+-------------+------------+
| Fire Confinement                         | 1E-5^1^     |            |
+------------------------------------------+-------------+------------+
| Localized Cable or Component Protection  | 1E-5^1^     |            |
+------------------------------------------+-------------+------------+
| Post-fire SSD                            | 1E-6        |            |
+------------------------------------------+-------------+------------+

^1^ This entry applies to both 'Moderate A' and 'Moderate B' findings
against a fire barrier.

> O Δ CDF~2.4~ is lower than the corresponding value in Table A1.6 - the
> finding screens to Green and the analysis is complete.
>
> O Δ CDF~2.4~ is greater than or equal to the corresponding value in
> Table A1.6. The analysis continues to Step 2.5

**Step 2.5 - Definition of Specific Fire Scenarios and Independent SSD
Path Second Screening Assessment:**

[Task 2.5.1: Identify Specific Fire Growth and Damage Scenarios (Fixed
Ignition Sources)]{.underline}

> [Task 2.5.2: Identify Specific Fire Growth and Damage Scenarios
> (Self-ignited Cable Fire, Transients. Hot Work)]{.underline}

[Task 2.5.3: Identify Specific Plant Damage State Scenarios]{.underline}
and

[Task 2.5.4: Assess Fire Scenario-Specific SSD Path
Independence]{.underline}

(Use the worksheet on the following page)

**Table A1.7**

<table>
<colgroup>
<col style="width: 3%" />
<col style="width: 19%" />
<col style="width: 6%" />
<col style="width: 17%" />
<col style="width: 13%" />
<col style="width: 6%" />
<col style="width: 10%" />
<col style="width: 7%" />
<col style="width: 8%" />
<col style="width: 6%" />
</colgroup>
<tbody>
<tr class="odd">
<td><strong>Source#</strong></td>
<td><p><strong>Unscreened Fire Source</strong></p>
<p><strong>at Specified HRR Value</strong></p></td>
<td><p><strong>FDS</strong></p>
<p><strong>State</strong></p>
<p><strong>(carried forward unscreened from Table
2.2.1)</strong></p></td>
<td><strong>Plant Damage State Scenarios</strong></td>
<td><p><strong>Scenario-Specific SSD Path Independence</strong></p>
<p><strong>(Yes / No)</strong></p></td>
<td><p><strong>Worst Case FDS</strong></p>
<p><strong>(√)</strong></p></td>
<td><p><strong>Revised Fire Frequency for Unscreened Fire
Sources</strong></p>
<p><strong>(from Table A1.5)</strong></p></td>
<td><p><strong>Weighting Factor*</strong></p>
<p><strong>(Attachment 5)</strong></p></td>
<td><p><strong>CCDPi</strong></p>
<p><strong>(from task 2.1.2 or 2.1.3)</strong></p></td>
<td><strong>Revised Fire Frequency x CCDP<sub>i</sub></strong></td>
</tr>
<tr class="even">
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td colspan="9"><img src="media/image7.wmf" /><img
src="media/image8.wmf" /></td>
<td></td>
</tr>
</tbody>
</table>

\* Weighting factors apply only to transient and hot work sources (see
Attachment 5).

Attach printouts of any spreadsheet calculations utilized from
NUREG-1805.

Assumptions/Comments/Remarks:\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

![](media/image9.wmf)

> ![](media/image10.wmf)
> \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

[Task 2.5.5: Screening Check]{.underline}

If the SSD path cannot be credited for any of the identified fire
ignition sources given its worst-case damage state, then Step 2.5.5 is
complete, and the analysis continues with Step 2.6.

If the SSD path can be credited for at least one fire ignition source,
then the screening check is performed based on the values and criteria
provided in the table below:

  ------------------------------------------- --------------- ---------------
  Number range CHAPTER**Table A1.8 - Phase 2,                 
  Screening Step 5 Quantitative Screening                     
  Criteria**                                                  

  **Assigned Finding Category (from Step      **ΔCDF~2.5~     
  1.1):**                                     screening       
                                              value**         

                                              **Moderate      **High
                                              Degradation**   Degradation**

  Fire Prevention and Administrative Controls N/A             1E-6

  Fixed Fire Protection Systems               1E-5            

  Fire Confinement                            1E-5^1^         

  Localized Cable or Component Protection     1E-5^1^         

  Post-fire SSD                               1E-6            
  ------------------------------------------- --------------- ---------------

^1^ This entry applies to both 'Moderate A' and 'Moderate B' findings
against a fire barrier.

-   The value of ΔCDF~2.5~ is lower than the corresponding value in
    Table A1.8. The finding Screens to Green, and the analysis is
    complete.

-   The value of ΔCDF~2.5~ exceeds the corresponding value in Table
    A1.8. The analysis continues to Step 2.6.

**Step 2.6 -** and **Step 2.7 -**

**Fire Growth and Damage Time Analysis** **Non-Suppression Probability
Analysis**

Attach printouts of any spreadsheet calculations utilized from
NUREG-1805.

**Table A1.9**

(All times in nearest whole minute - damage times rounded down,
detection/suppression and manual response times up)

+---+----------------------+-------+-------+-------+--------+-------+
| * | **Unscreened Fire    | *     | *     | **(T  | *      | *     |
| * | Damage State         | *Time | *Dete | ~Dama | *Fixed | *~(~T |
| N | Scenarios**          | to    | ction | ge~ - | Suppr  | ~Dama |
| u |                      | Dam   | T     | T~Det | ession | ge~ - |
| m |                      | age** | ime** | ectio | Act    | T~Su  |
| b |                      |       |       | n~)** | uation | ppres |
| e |                      | **(   | **(   |       | Time** | sion~ |
| r |                      | Attac | Attac |       |        | )**   |
| r |                      | hment | hment |       | *      |       |
| a |                      | 7)**  | 8)**  |       | *(Atta |       |
| n |                      |       |       |       | chment |       |
| g |                      |       |       |       | 8 and  |       |
| e |                      |       |       |       | NUR    |       |
| C |                      |       |       |       | EG-180 |       |
| H |                      |       |       |       | 5~)~** |       |
| A |                      |       |       |       |        |       |
| P |                      |       |       |       |        |       |
| T |                      |       |       |       |        |       |
| E |                      |       |       |       |        |       |
| R |                      |       |       |       |        |       |
| S |                      |       |       |       |        |       |
| o |                      |       |       |       |        |       |
| u |                      |       |       |       |        |       |
| r |                      |       |       |       |        |       |
| c |                      |       |       |       |        |       |
| e |                      |       |       |       |        |       |
| \ |                      |       |       |       |        |       |
| # |                      |       |       |       |        |       |
| * |                      |       |       |       |        |       |
| * |                      |       |       |       |        |       |
+---+----------------------+-------+-------+-------+--------+-------+
|   |                      |       |       |       |        |       |
+---+----------------------+-------+-------+-------+--------+-------+
|   |                      |       |       |       |        |       |
+---+----------------------+-------+-------+-------+--------+-------+
|   |                      |       |       |       |        |       |
+---+----------------------+-------+-------+-------+--------+-------+
|   |                      |       |       |       |        |       |
+---+----------------------+-------+-------+-------+--------+-------+
|   |                      |       |       |       |        |       |
+---+----------------------+-------+-------+-------+--------+-------+
|   |                      |       |       |       |        |       |
+---+----------------------+-------+-------+-------+--------+-------+
|   |                      |       |       |       |        |       |
+---+----------------------+-------+-------+-------+--------+-------+
|   |                      |       |       |       |        |       |
+---+----------------------+-------+-------+-------+--------+-------+
|   |                      |       |       |       |        |       |
+---+----------------------+-------+-------+-------+--------+-------+
|   |                      |       |       |       |        |       |
+---+----------------------+-------+-------+-------+--------+-------+

Assumptions/Comments/Remarks:\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

[Task 2.7.4: Probability of Non-Suppression]{.underline}

**Table A1.10**

+---+-----------------------------+----------+-----------+-----------+
| * | **Unscreened Fire Damage    | **PNS~   | **PNS~    | **PN      |
| * | State Scenarios**           | fixed~** | manual~** | S~scenari |
| S |                             |          |           | o\ *i*~** |
| o |                             | **(Table | **(Table  |           |
| u |                             | A8.2)**  | 2.7.1)**  | **(A      |
| r |                             |          |           | ttachment |
| c |                             |          |           | 8)**      |
| e |                             |          |           |           |
| # |                             |          |           |           |
| * |                             |          |           |           |
| * |                             |          |           |           |
+---+-----------------------------+----------+-----------+-----------+
|   |                             |          |           |           |
+---+-----------------------------+----------+-----------+-----------+
|   |                             |          |           |           |
+---+-----------------------------+----------+-----------+-----------+
|   |                             |          |           |           |
+---+-----------------------------+----------+-----------+-----------+
|   |                             |          |           |           |
+---+-----------------------------+----------+-----------+-----------+
|   |                             |          |           |           |
+---+-----------------------------+----------+-----------+-----------+
|   |                             |          |           |           |
+---+-----------------------------+----------+-----------+-----------+
|   |                             |          |           |           |
+---+-----------------------------+----------+-----------+-----------+
|   |                             |          |           |           |
+---+-----------------------------+----------+-----------+-----------+
|   |                             |          |           |           |
+---+-----------------------------+----------+-----------+-----------+
|   |                             |          |           |           |
+---+-----------------------------+----------+-----------+-----------+

Assumptions/Comments/Remarks:\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

[Task 2.7.5: Screening Check]{.underline}

The estimated risk contribution or screening CDF, for each fire scenario
is based on the product of the following factors:

**Table A1.11**

+---+----------------------+--------------------------+-----+---------+
| S | **Unscreened Fire    | **Revised Fire Frequency | *   | **      |
| o | Damage State         | x CCDP~i~**              | *PN | Revised |
| u | Scenarios**          |                          | S~i | Fire    |
| r |                      | **(F~Source\ *i*~ X      | ~** | Freq    |
| c |                      | SF*~i~* X AF~*i*\ 2.4~  |     | uency** |
| e |                      | X                        | *   |         |
| # |                      | CCDP~*                   | *(f |         |
| N |                      | i*\ 2.1.2\ or\ 2.1.3~)** | rom |         |
| u |                      |                          | Ta  |         |
| m |                      | **(from Table A1.7)**    | ble |         |
| b |                      |                          | A1  |         |
| e |                      |                          | .10 |         |
| r |                      |                          | )** |         |
| r |                      |                          |     |         |
| a |                      |                          |     |         |
| n |                      |                          |     |         |
| g |                      |                          |     |         |
| e |                      |                          |     |         |
| C |                      |                          |     |         |
| H |                      |                          |     |         |
| A |                      |                          |     |         |
| P |                      |                          |     |         |
| T |                      |                          |     |         |
| E |                      |                          |     |         |
| R |                      |                          |     |         |
+---+----------------------+--------------------------+-----+---------+
|   |                      |                          |     |         |
+---+----------------------+--------------------------+-----+---------+
|   |                      |                          |     |         |
+---+----------------------+--------------------------+-----+---------+
|   |                      |                          |     |         |
+---+----------------------+--------------------------+-----+---------+
|   |                      |                          |     |         |
+---+----------------------+--------------------------+-----+---------+
|   |                      |                          |     |         |
+---+----------------------+--------------------------+-----+---------+
|   |                      |                          |     |         |
+---+----------------------+--------------------------+-----+---------+
|   |                      |                          |     |         |
+---+----------------------+--------------------------+-----+---------+
|   |                      |                          |     |         |
+---+----------------------+--------------------------+-----+---------+
| T |                      |                          |     |         |
| o |                      |                          |     |         |
| t |                      |                          |     |         |
| a |                      |                          |     |         |
| l |                      |                          |     |         |
| ! |                      |                          |     |         |
| [ |                      |                          |     |         |
| ] |                      |                          |     |         |
| ( |                      |                          |     |         |
| m |                      |                          |     |         |
| e |                      |                          |     |         |
| d |                      |                          |     |         |
| i |                      |                          |     |         |
| a |                      |                          |     |         |
| / |                      |                          |     |         |
| i |                      |                          |     |         |
| m |                      |                          |     |         |
| a |                      |                          |     |         |
| g |                      |                          |     |         |
| e |                      |                          |     |         |
| 1 |                      |                          |     |         |
| 1 |                      |                          |     |         |
| . |                      |                          |     |         |
| w |                      |                          |     |         |
| m |                      |                          |     |         |
| f |                      |                          |     |         |
| ) |                      |                          |     |         |
+---+----------------------+--------------------------+-----+---------+

![](media/image12.wmf)

![](media/image13.wmf)\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

If ΔCDF~2.7~ is less than or equal to 1E-6, then the finding screens to
Green, and the analysis is complete. If ΔCDF~2.7~ is greater than 1E-6,
then the analysis continues to Step 2.8.

**Step 2.8 - Plant Safe Shutdown Response Analysis**

Using the appropriate plant initiating event worksheet(s) from the plant
risk-informed inspection notebook, carry out the guidance provided under
Step 2.8 of Appendix F, to account for the plant SSD response and
required human recovery actions in order to quantify the factor
"CCDP~i~" for each fire growth and damage scenario of interest.

Attach any internal event worksheets and manual action evaluation table
determinations used to quantify each CCDP~i~.

(Use the worksheet on the following page)

+---+----------------------+------+------+------+------+------+--------+
| N |                      |      |      |      |      |      |        |
| u |                      |      |      |      |      |      |        |
| m |                      |      |      |      |      |      |        |
| b |                      |      |      |      |      |      |        |
| e |                      |      |      |      |      |      |        |
| r |                      |      |      |      |      |      |        |
| r |                      |      |      |      |      |      |        |
| a |                      |      |      |      |      |      |        |
| n |                      |      |      |      |      |      |        |
| g |                      |      |      |      |      |      |        |
| e |                      |      |      |      |      |      |        |
| C |                      |      |      |      |      |      |        |
| H |                      |      |      |      |      |      |        |
| A |                      |      |      |      |      |      |        |
| P |                      |      |      |      |      |      |        |
| T |                      |      |      |      |      |      |        |
| E |                      |      |      |      |      |      |        |
| R |                      |      |      |      |      |      |        |
| * |                      |      |      |      |      |      |        |
| * |                      |      |      |      |      |      |        |
| T |                      |      |      |      |      |      |        |
| a |                      |      |      |      |      |      |        |
| b |                      |      |      |      |      |      |        |
| l |                      |      |      |      |      |      |        |
| e |                      |      |      |      |      |      |        |
| A |                      |      |      |      |      |      |        |
| 1 |                      |      |      |      |      |      |        |
| . |                      |      |      |      |      |      |        |
| 1 |                      |      |      |      |      |      |        |
| 2 |                      |      |      |      |      |      |        |
|   |                      |      |      |      |      |      |        |
| - |                      |      |      |      |      |      |        |
| S |                      |      |      |      |      |      |        |
| t |                      |      |      |      |      |      |        |
| e |                      |      |      |      |      |      |        |
| p |                      |      |      |      |      |      |        |
| 2 |                      |      |      |      |      |      |        |
| . |                      |      |      |      |      |      |        |
| 8 |                      |      |      |      |      |      |        |
| : |                      |      |      |      |      |      |        |
| P |                      |      |      |      |      |      |        |
| l |                      |      |      |      |      |      |        |
| a |                      |      |      |      |      |      |        |
| n |                      |      |      |      |      |      |        |
| t |                      |      |      |      |      |      |        |
| S |                      |      |      |      |      |      |        |
| a |                      |      |      |      |      |      |        |
| f |                      |      |      |      |      |      |        |
| e |                      |      |      |      |      |      |        |
| S |                      |      |      |      |      |      |        |
| h |                      |      |      |      |      |      |        |
| u |                      |      |      |      |      |      |        |
| t |                      |      |      |      |      |      |        |
| d |                      |      |      |      |      |      |        |
| o |                      |      |      |      |      |      |        |
| w |                      |      |      |      |      |      |        |
| n |                      |      |      |      |      |      |        |
| R |                      |      |      |      |      |      |        |
| e |                      |      |      |      |      |      |        |
| s |                      |      |      |      |      |      |        |
| p |                      |      |      |      |      |      |        |
| o |                      |      |      |      |      |      |        |
| n |                      |      |      |      |      |      |        |
| s |                      |      |      |      |      |      |        |
| e |                      |      |      |      |      |      |        |
| A |                      |      |      |      |      |      |        |
| n |                      |      |      |      |      |      |        |
| a |                      |      |      |      |      |      |        |
| l |                      |      |      |      |      |      |        |
| y |                      |      |      |      |      |      |        |
| s |                      |      |      |      |      |      |        |
| i |                      |      |      |      |      |      |        |
| s |                      |      |      |      |      |      |        |
| * |                      |      |      |      |      |      |        |
| * |                      |      |      |      |      |      |        |
+---+----------------------+------+------+------+------+------+--------+
| * | **Unscreened Fire    | **   | **   | **   | **   | **   | **CCD  |
| * | Damage State         | HEP~ | P~SP | CCDP | CCDP | CCDP | P~i~** |
| S | Scenarios**          | i~** | i~** | ~(g  | ~(gi | ~(gi |        |
| o |                      |      |      | iven | ven\ | ven\ |        |
| u |                      | **(  | **(  | \ su |  man |  man |        |
| r |                      | from | from | cces | ual\ | ual\ |        |
| c |                      | T    | T    | sful |  act |  act |        |
| e |                      | able | able | \ ma | ion\ | ion\ |        |
| \ |                      | 2    | 2.8. | nual |  fai |  fai |        |
| # |                      | .8.1 | 3)** | \ ac | ls\  | ls\  |        |
| * |                      | or   |      | tion | and\ | and\ |        |
| * |                      | 2.8. |      | )~** |  spu |  no\ |        |
|   |                      | 2)** |      |      | riou |  spu |        |
|   |                      |      |      |      | s\ a | riou |        |
|   |                      |      |      |      | ctua | s\ a |        |
|   |                      |      |      |      | tion | ctua |        |
|   |                      |      |      |      | )~** | tion |        |
|   |                      |      |      |      |      | )~** |        |
+---+----------------------+------+------+------+------+------+--------+
|   |                      |      |      |      |      |      |        |
+---+----------------------+------+------+------+------+------+--------+
|   |                      |      |      |      |      |      |        |
+---+----------------------+------+------+------+------+------+--------+
|   |                      |      |      |      |      |      |        |
+---+----------------------+------+------+------+------+------+--------+
|   |                      |      |      |      |      |      |        |
+---+----------------------+------+------+------+------+------+--------+
|   |                      |      |      |      |      |      |        |
+---+----------------------+------+------+------+------+------+--------+
|   |                      |      |      |      |      |      |        |
+---+----------------------+------+------+------+------+------+--------+
|   |                      |      |      |      |      |      |        |
+---+----------------------+------+------+------+------+------+--------+
|   |                      |      |      |      |      |      |        |
+---+----------------------+------+------+------+------+------+--------+

> CCDP~i~ = \[(1-HEP~i~) x CCDP(given successful manual action)\] +

\[HEP~i~ x P~SPi~ x CCDP(given manual action fails and spurious
actuation)\] +

\[HEP~i~ x (1 - P~SPi~) x CCDP(given manual action fails and no spurious
actuation)\]

> where: HEP~i~ is the true value of the human error probability for
> scenario i (not the exponent value derived from the HEP tables), and
>
> P~SPi~ is the probability of a spurious actuation for scenario I.

**Step 2.9 - Quantification and Preliminary Significance Determination**

Calculate a final quantification of the FDS scenarios of interest and
assign a preliminary determination of a findings significance.

+---+-----------------+-------------------+-----------+-------+-------+
| * | **Unscreened    | **Revised Fire    | **        | *     | **~Re |
| * | Fire Damage     | Frequency for     | ~Probabil | *~CCD | vised |
| S | State           | Unscreened Source | ity\ of\  | P~i** | \ Fir |
| o | Scenarios**     | (from Step 2.4)** | Non-Suppr |       | e\ Fr |
| u |                 |                   | ession~** | **(   | equen |
| r |                 | **(F~Source\ i~ x |           | Table | cy\ f |
| c |                 | SF~i~ x AF~i~    | **~       | A1.   | or\ U |
| e |                 | ~2.4~)**          | (PNSi~)** | 12)** | nscre |
| \ |                 |                   |           |       | ened\ |
| # |                 | **(from Table     | **(Table  |       |  Sour |
| * |                 | A1.5)**           | A1.10)**  |       | ce~** |
| * |                 |                   |           |       |       |
+---+-----------------+-------------------+-----------+-------+-------+
|   |                 |                   |           |       |       |
+---+-----------------+-------------------+-----------+-------+-------+
|   |                 |                   |           |       |       |
+---+-----------------+-------------------+-----------+-------+-------+
|   |                 |                   |           |       |       |
+---+-----------------+-------------------+-----------+-------+-------+
|   |                 |                   |           |       |       |
+---+-----------------+-------------------+-----------+-------+-------+
|   |                 |                   |           |       |       |
+---+-----------------+-------------------+-----------+-------+-------+
|   |                 |                   |           |       |       |
+---+-----------------+-------------------+-----------+-------+-------+
|   |                 |                   |           |       |       |
+---+-----------------+-------------------+-----------+-------+-------+
|   |                 |                   |           |       |       |
+---+-----------------+-------------------+-----------+-------+-------+
| T |                 |                   |           |       |       |
| o |                 |                   |           |       |       |
| t |                 |                   |           |       |       |
| a |                 |                   |           |       |       |
| l |                 |                   |           |       |       |
| ! |                 |                   |           |       |       |
| [ |                 |                   |           |       |       |
| ] |                 |                   |           |       |       |
| ( |                 |                   |           |       |       |
| m |                 |                   |           |       |       |
| e |                 |                   |           |       |       |
| d |                 |                   |           |       |       |
| i |                 |                   |           |       |       |
| a |                 |                   |           |       |       |
| / |                 |                   |           |       |       |
| i |                 |                   |           |       |       |
| m |                 |                   |           |       |       |
| a |                 |                   |           |       |       |
| g |                 |                   |           |       |       |
| e |                 |                   |           |       |       |
| 1 |                 |                   |           |       |       |
| 4 |                 |                   |           |       |       |
| . |                 |                   |           |       |       |
| w |                 |                   |           |       |       |
| m |                 |                   |           |       |       |
| f |                 |                   |           |       |       |
| ) |                 |                   |           |       |       |
+---+-----------------+-------------------+-----------+-------+-------+

Assumptions/Comments/Remarks:\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

The estimated risk contribution or screening CDF, for each fire scenario
is based on the product of the following factors:

> ![](media/image15.wmf)
>
> ![](media/image16.wmf)
>
> ![](media/image17.wmf)\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
>
> Where:
>
> n = number of fire scenarios evaluated for a given finding (covering
> all relevant FDSs)
>
> DF = Duration factor from Step 1.4
>
> F~i~ = Fire frequency for the fire ignition source i from Task 2.4.1
>
> SF~i~ = Severity factor for scenario i from Task 2.4.1
>
> AF~i\ 2.4~ = Ignition source specific frequency adjustment factors
> from Step 2.4
>
> PNS~i~ = Probability of non-suppression for scenario i from Step 2.7
>
> CCDP~i~ = Conditional core damage probability for scenario i from Step
> 2.8
>
> If ΔCDF~2.8~ is less than or equal to 1E-6, then the finding screens
> to Green, and the analysis is complete. If ΔCDF~2.8~ is greater than
> 1E-6, then the finding is potential safety significant.
>
> Intentionally Blank