+-------------------------------------------------------+------+-------+
|                                                       | NSTS |       |
|                                                       | 170  |       |
|                                                       | 0.7B |       |
|                                                       |      |       |
|                                                       | ISS  |       |
|                                                       | ADDE |       |
|                                                       | NDUM |       |
+-------------------------------------------------------+------+-------+
| **Safety Policy and Requirements**                    |      |       |
+-------------------------------------------------------+------+-------+
| For Payloads Using the International Space Station    |      |       |
+-------------------------------------------------------+------+-------+
|                                                       |      |       |
+-------------------------------------------------------+------+-------+
| December 1995                                         |      |       |
+-------------------------------------------------------+------+-------+
| ![](media/image1.png)                                 |      |       |
|                                                       |      |       |
| National Aeronautics and                              |      |       |
|                                                       |      |       |
| Space Administration                                  |      |       |
|                                                       |      |       |
| **Lyndon B. Johnson Space Center**                    |      |       |
|                                                       |      |       |
| Houston, Texas                                        |      |       |
+-------------------------------------------------------+------+-------+

NSTS 1700.7B

ISS ADDENDUM

DESCRIPTION OF CHANGES TO

SAFETY POLICY AND REQUIREMENTS FOR PAYLOADS

USING THE INTERNATIONAL SPACE STATION

  --------- ------------------------------------ ---------- --------------
  CHANGE    DESCRIPTION/AUTHORITY                DATE       PAGES AFFECTED
  NO.                                                       

                                                            

  \--       Basic issue/AO96058                  12/08/95   All

                                                            

  1         Update sections 213.1 and            09/01/00   14,16,16A
            220.10/R21700-ISS-0002                          

                                                            

  2         Update section 102.2/\               05/18/01   2
            R21700-ISS-0003                                 

                                                            

  3         Add section 223/R21700-ISS-0004      02/01/02   17

                                                            

  4         Update sections 105, 200.4a and      08/16/02   3,4,5
            200.4b/R21700-ISS-0005                          

                                                            

  5         Update sections 105, 202.5, 213.3    01/22/03   3,4,8,8A,14
            and add 202.6/R21700-ISS-0006                   

                                                            

  6         Update sections 105, 208.4a,         03/25/03   4,9,9A,13,14
            212.4/R21700-ISS-0007                           

                                                            

  7         Update sections 104, 105, 212.3 and  07/14/04   3,4,13,15
            216.5/R21700-ISS-0008                           

                                                            

                                                            
  --------- ------------------------------------ ---------- --------------

Note: Dates reflect latest signature date of CR\'s received by PILS.

ADDENDUM SCOPE

This addendum to NSTS 1700.7B has been prepared to expand and modify the
existing NSTS 1700.7B requirements such that International Space Station
(ISS) payload safety requirements are identified to the ISS payload
development organizations.

The addendum is structured such that when it is used in conjunction with
a unique Payload Integration Plan (PIP), the payload organization can
provide a safe design for both the STS transportation phases and the ISS
on-orbit operations. ISS payload which have a direct physical or
functional interface with the orbiter or a Space Shuttle carrier in
addition to a direct physical/functional interface with ISS carriers or
elements must comply with the applicable requirements of the basic NSTS
1700.7B as well as the applicable requirements of this addendum.

ADDENDUM STRUCTURE

This addendum has been structured to take maximum advantage of the
familiarity most payload organizations have with safety requirements
defined in NSTS 1700.7B, and the safety process defined in NSTS 13830.
These documents have been in use for many years with hundreds of major
and minor payloads developed and flown on the Space Shuttle. The
addendum approach was selected to relate Space Station requirements to
the user's in a form that maintains continuity between the Shuttle and
Space Station programs.

This addendum addresses each paragraph of NSTS 1700.7B and defines its
applicability. Existing NSTS 1700.7B paragraphs have been identified as
1) Applicable, 2) Applicable with change, 3) Not applicable, or 4)
Applicable only when specifically identified in the PIP. Paragraphs in
this addendum have been identified as "added" when there is no existing
counterpart in NSTS 1700.7B.

  ----------------------------------- --- --------------------------------
  Signed by H. R. Brinkley                Signed by T. W. Holloway

  H. R. Brinkley                          T. W. Holloway

  Manager, Space Station Program          Manager, Space Shuttle Program
  Office                                  
  ----------------------------------- --- --------------------------------

**CHAPTER 1: GENERAL**

**100** **Purpose** - Applicable with change

Change "Space Transportation System (STS)" to "International Space
Station (ISS)"

**101** **Scope** - Applicable with change

Change the "the STS" to "the STS and the ISS"\
Change "STS" to "STS/ISS"

**101.1 GSE Design and Ground Operations** - Applicable

**101.2 Flight Rules** - Applicable with change

Change "STS mission" to "ISS increment"\
Change "STS flight" to "ISS objectives"\
Change "STS user" to "ISS user"

**102** **Responsibility** - Applicable

**102.1** **Payload Organization** - Applicable with change\
\
Change "NSTS" to "ISS"

**102.2** **NSTS** - Applicable with change\
\
Change to read as follows:\
\
"102.2 Payload Safety Review Panel (PSRP) and Ground Safety Review Panel
(GSRP), and ISS Program"\
\
"The Payload Safety Review Panel (PSRP) and the Ground Safety Review
Panel (GSRP) have been assigned the responsibility for conducting safety
reviews for ISS payloads. The PSRP will review payloads for safety for
all phases of flight operations. The GSRP will review payloads for
safety for prelaunch and postlanding operations. The panels will be
augmented by ISS representatives and International Partners as
required."

"It is the responsibility of the ISS Program to assure that interaction
among mixed payloads, and between payloads and the ISS, does not create
a hazard."

**103** **Implementation** - Applicable with change

Change "NSTS" to "PSRP" in all locations

**103.1** **Implementation Procedure** - Applicable with change\
\
Change "NSTS" to "NSTS/ISS" in all locations other than it's use in
association with "[NSTS 13830]{.underline}"

**103.2** **Interpretations of Requirements** - Applicable with change\
\
Add the following sentence to the existing paragraph:\
\
"Each additional addenda to NSTS 18798 will include an update table of
contents which will also reflect the applicability of each letter to STS
and/or ISS payloads."

**104** **Glossary of Terms** -- Applicable with change\
\
For the waiver definition, change "one mission only" to "one or more
missions or increments"

**105** **Applicable Documents** - Applicable with change

Add the following documents:

SSP 30237 Space Station Electromagnetic Emission and Susceptibility
Requirements for EMC - Referenced in paragraphs 202.5 and 212.2.

SSP 30425 Space Station Program Natural Environment Definition for
Design -- Referenced in paragraph 208.4e.

SSP 50005 International Space Station Crew Integration Standard (NASA
Standard 3000) - Referenced in paragraph 202.5.

SSP 52005 ISS Payload Flight Equipment Requirements and Guidelines for
Safety Critical Structures - Referenced in paragraph 208.1.

SSP 57000 Pressurized Payloads Interface Requirements Document --
Referenced in paragraphs 202.6 and 213.1.

SSP 57025 ISS Payload Interface Systems Fault Tolerance Document --
Referenced in paragraph 200.4b.

TM 102179 Selection of Wires and Circuit Protective Devices for Orbiter
Vehicle Payload Electrical Circuits - Referenced in paragraph 213.1.

Paragraph deleted

NSTS 21000-IDD-ISS International Space Station Interface Definition
Document -- Referenced in paragraphs 202.5, 202.6, 212.3, and 213.3.

**106** **Figures** - Applicable

**CHAPTER 2: TECHNICAL REQUIREMENTS**

**200 General** - Applicable

**200.1** **Design to Tolerate Failures** - Applicable

**200.1a** **Critical Hazards** - Applicable with change\
\
Change "STS" to "STS/ISS"\
Change "Orbiter" to "Orbiter/ISS"

**200.1b** **Catastrophic Hazards** - Applicable with change\
\
Change "Orbiter" to "Orbiter/ISS"\
Change "STS" to "STS/ISS"

**200.2** **Design for Minimum Risk** - Applicable with change\
\
Change "NSTS" to "NSTS/ISS"

**200.3** **Environmental Compatibility** - Applicable

**200.4** **ISS Services** - Title change only

**200.4a** **Safe Without Services** - Applicable when changed to read
as follows:\
\
"Payloads shall be designed to maintain fault tolerance or safety
margins consistent with the hazard potential, without ground or flight
crew intervention, in the event of sudden loss or temporary interruption
of Space Station provided services. The payload must remain in a safe
state until returned to operation by the ground or flight crew."

**200.4b** **ISS Critical Services** (title change only) - Applicable
when changed to read as follows:\
\
"When Space Station services are to be utilized to assist in controlling
payload hazards, the integrated system must meet the failure tolerance
requirements of paragraph 200.1. SSP 57025 specifies the fault tolerance
of Space Station-provided payload services which must be used when
conducting payload hazard analyses. The payload organization must
provide a summary of the hazards being controlled by the Space Station
services in the Safety Compliance Data Package, and the individual
hazard reports must identify those space station interfaces used to
control and/or

monitor those hazards. In addition, the payload organization shall
identify, in the payload/SS Interface Control Document (ICD), those
space station interfaces used to control and/or monitor the hazards.
Those payloads having hazards controlled by ISS‑provided services and
utilities shall perform post-mate interface verification prior to
payload operations having hazard potential."

**201 Control of Hazardous Functions** - Applicable

**201.1** **General** - Applicable

**201.1a** **Inhibits** - Applicable

**201.1b** **Controls** - Applicable

**201.1c** **Monitors** - Applicable

**201.1c(1)** **Near Real-Time Monitoring** - Applicable with change\
\
Change the last sentence to read as follows:\
\
"Local visual indicators shall not be used as the only source of safety
monitoring unless the crew is actively engaged in payload operations at
the visual indicator location."

**201.1c(2)** **Real-Time Monitoring** - Applicable with change\
\
Change "Orbiter failure detection and annunciation system" to "ISS
caution and warning system"\
\
Change "switch panel talk back" to "local visual indicators"

**201.1c(3)** **Unpowered Bus Exception** - Applicable

**201.1d** **Use of Timers** - Applicable with change

Change "Orbiter" to "ISS"

**201.1e** **Computer-Based Control Systems** - Applicable

**201.1e(1)** **Active Processing** - Applicable

**201.1e(2)** **Control of Inhibits** - Applicable

**201.2** **Functions Resulting in Critical Hazards** - Applicable

**201.3** **Functions Resulting in Catastrophic Hazards** - Applicable

**202 Specific Catastrophic Hazardous Functions** - Applicable

**202.1** **Solid Propellant Rocket Motors**

\- through -

**202.2d Propellant Leakage**

The above paragraphs (202.1 through 202.2d) are not applicable to Space
Station payloads unless specifically applied by the PIP.

**202.3 Applicable**

**202.4 Planned Deployment/Extension Functions** - Applicable

**202.4a Preventing Payload Bay Door Closure** - Applicable

**202.4b Cannot Withstand Subsequent Loads** - Applicable with change\
\
Change "STS" to "STS/ISS"\
\
Delete the last sentence which reads:\
\
"Safing may include deployment, jettison, or provisions to change the
configuration of the payload to eliminate the hazard."

**202.4c** Added paragraph

**202.4c Payload Reconfiguration**

Payload equipment shall not be reconfigured, erected, or operated upon
in a manner which could present a hazard to the crew, ISS/Orbiter, or
which would make it unsuitable for safe return if the item is planned
for return.

**202.5 R.F. Energy Radiation** - Applicable when changed to read as
follows:\
\
**"202.5** **R.F. Energy Radiation** - Allowable levels of radiation
from ISS payload transmitter systems in their operating locations shall
be limited as follows:

a\. The Orbiter, Orbiter RMS, EMU, and Orbiter payload limits are
defined in NSTS-21000-IDD-ISS, paragraph 10.7.3.2.2.

b\. Personnel limits are defined in paragraph 5.7.3.2.1 of SSP 50005.

c\. The Space Station equipment limit is defined by the test limit RS03
of SSP 30237.

d\. No radiation is permitted during transport or assembly of
transmitting equipment.

Radiation levels which would exceed the above limits are considered to
be catastrophic and the system design must comply with the requirements
of paragraph 200.1b if the equipment is connected to a power source."

**202.5a** Not applicable

**202.5b** Not applicable

**202.5c** Not applicable

**202.6 Fluid Release from a Pressurized System Inside of a Closed
Volume** - Applicable with change\
\
Change "NSTS" 07700 (Volume XIV, Attachment 1, ICD-2-19001, section
10.6.2.3)" to "NSTS 21000-IDD-ISS, paragraph 10.6.2.3."\
\
Add the following sentences:\
\
"Release of any fluid from a payload pressurized system shall not
compromise the structural integrity of any ISS pressurized module.
Payloads with pressurized systems must comply with the requirements of
SSP 57000, paragraph 3.7.5, or ISS-approved International Partner
equivalent."

**203 Retrieval of Payloads** - Applicable

**203.1** **Safing** - Applicable

**203.2** **Substantiating Failure Tolerance** - Applicable with change

Change "Orbiter" to "Orbiter/ISS" in two places\
Change "NSTS" to "PSRP"

**203.3** **Monitoring** - Applicable

**203.4** **Certification** - Applicable with change\
\
Change "NSTS" to "NSTS/ISSP"\
Change "STS" to "STS/ISS"

**204 Hazard Detection and Safing** - Applicable with change

Change "Orbiter" to "ISS"\
Change "NSTS" to "PSRP"

Add the following sentence:

"Flight or ground crew hazard detection and safing actions are not
available for ascent and descent flight phases."

**205 Contingency Return and Rapid Safing** - Applicable with change

Change the paragraph to read as follows:

"The payload design shall not impede emergency IVA egress to the
remaining contiguous pressurized volumes. Crew egress time from
experiment apparatus shall be less than 30 seconds."

**206** **Failure Propagation** - Applicable

**207** **Redundancy Separation** - Applicable

**208** **Structures** - Applicable

**208.1** **Structural Design** - Applicable with change\
\
Delete "STS" from first sentence\
Change on-orbit load safety factor from 1.4 to 1.5 for ISS payloads\
Change the third sentence to read as follows:\
\
"Verification of design compliance shall be in\
accordance with NSTS 14046 and SSP 52005."

**208.2** **Emergency Landing Loads** - Applicable

**208.3** **Stress Corrosion** - Applicable with change\
\
Delete "NSTS" in two places

**208.4** **Pressure Systems** - Applicable

**208.4a** **Pressure Vessels** - Applicable with change

Add the following sentence:

"The minimum factor of safety for ISS payload pressure vessels is 2.0 x
MDP unless the PSRP specifically authorizes a lower factor. In no case
shall the factor be less than 1.5 x MDP and the vessel design and test
program must certify the vessel for all environments and service life."

**208.4a(1)** **Metallic Pressure Vessels** - Applicable

**208.4a(2)** **Composite Overwrapped Pressure Vessels (COPVs)** -
Applicable

**208.4b** **Dewars** - Applicable with change\
\
Make the following addition to item (5):\
\
"ISS payloads may vent non-hazardous gas into the waste gas system in
accordance with the SSP 52000, Payload Interface Definition Documents
(IDD's). Payloads using the waste gas system and external payloads shall
identify venting requirements in the payload unique Interface Control
Document (ICD)."

**208.4c Pressurized Lines, Fittings, and Components** - Applicable with
change\
\
Change the safety factor for lines and fittings 1.5 - inch or greater
outside diameter from 1.5 to 2.0 for ISS payloads in item (1).\
\
Change "Orbiter" to "Orbiter/ISS" in item (4).

**208.4d Flow Induced Vibrations** - Applicable with change\
\
Delete "to the STS"

**208.4e** Added paragraph\
\
**"208.4e** **Meteoroid and Debris Protection\
\
**An external payload with pressure vessels, cryogenic carrier, or other
hardware that would create a hazard if impacted by meteoroid/debris
shall provide meteoroid/debris shielding sufficient to be equal or
better than the probability of 0.9999 of experiencing no penetration of
the critical hardware over a 1 year period. The Payload exposure to M/OD
environment shall not endanger the crew or module survivability. This
includes initial failure of the payload and secondary effects of the
failure including creation of secondary ejecta.\
\
Sections 8.1 and 8.2 of NASA SSP 30425 specify a summary of the
meteoroid environments and the associated shielding/de-focusing factors
and space debris environment."

**208.5** **Sealed Compartments** - Applicable with change\
\
Change the paragraph to read as follows:

**"208.5** **Sealed or Vented Compartments\
\
**Payload sealed compartments shall be designed to withstand the maximum
pressure differential created by ascent, descent, or on-orbit emergency
ISS depressurization or repressurization activity. Vented compartments
must size vent flow areas such that structural integrity is maintained
at the maximum rate of change of pressure."

**209 Materials** - Applicable with change

Change "NSTS" to "NSTS/ISSP" in two places

**209.1** **Hazardous Materials** - Applicable with change\
\
Add the following sentence to the existing paragraph:\
\
"Hazardous materials shall not be released or ejected in or near the
ISS, unless such release/ejection has been negotiated with the ISSP."

**209.1a** **Fluid Systems** - Applicable with change\
\
Change "NSTS" to "PSRP"

**209.1b** **Chemical Release** - Applicable with change\
\
Change "STS" to "STS/ISS"

**209.2** **Flammable Materials** - Applicable with change\
\
Change "STS" to "STS/ISS"

**209.2a** **Orbiter Cabin** - Not applicable unless the payload is
transported or operated in the Orbiter cabin.

**209.2b** **Other Habitable Areas** - Applicable with change\
\
Add the following two paragraphs to the existing paragraph:\
\
"The ISS worst case operating environment is 15.2 psia with 24.1 percent
oxygen for all locations except airlocks. Airlock worst case environment
is 10.2 psia with 30 percent oxygen. Payloads are only required to test
materials in the worst case airlock environment if they intend to
operate in the airlock during EVA preparations.

When flammable materials are used in quantities where the weight or
surface area is greater than 0.1 pounds or 10 square inches,
respectively, the methods of control of flame propagation must be
described in the "flammability assessment report," prepared in
accordance with NSTS 22648."

**209.2c** **Outside Habitable Areas** - Applicable with change\
\
Change "Orbiter cabin" to "pressurized areas"

**209.3** **Material Offgassing in Habitable Areas** - Applicable with
change\
\
Change "STS" to "STS/ISS"\
Change "NSTS" to "ISSP"

**210** **Pyrotechnics** - Applicable with change

Change the paragraph to read as follows:

"If premature firing or failure to fire will cause a hazard, the
pyrotechnic subsystem and devices shall meet the design and test
requirements of MIL‑STD‑1576."

**210.1** **Initiators** - Applicable with change\
\
Change the paragraph to read as follows:\
\
"NASA Standard Initiators (NSI's) are the preferred initiators for all
safety critical pyrotechnic functions. Extensive qualification and
acceptance test programs are required if other initiators are used."

**210.1a** **Flight Unit Acceptance Test** - Not applicable

**210.1b** **Design Configuration** - Not applicable

**210.1c** **Design Verification** - Not applicable

**210.2** **Pyrotechnic Operated Devices** - Applicable

**210.2a** **Debris Protection** - Applicable with change\
\
Change "the Orbiter" to "in or near the ISS/Orbiter"

**210.2b** **Must Function Safety Critical Devices** - Applicable with
change\
\
Change "NSTS review" to "PSRP review"

**210.2c** **Electrical Connection** - Applicable with change\
\
Change the paragraph to read as follows:\
\
"Payloads with pyrotechnic devices which if prematurely fired may cause
injury to people or damage to property shall be designed such that these
devices can be electrically connected after all payload/Space Station
electrical interface verification tests have been completed. Ordnance
circuitry must be verified safe prior to connection of pyrotechnic
devices."

**210.3** **Traceability** - Applicable with change\
\
Change "NSTS" to "PSRP"

**211 Destruct Systems** - Applicable with change

Change "NSTS" to "PSRP"

**212 Radiation** - Applicable

**212.1** **Ionizing Radiation** - Applicable

**212.2** "**Electromagnetic Emissions and Susceptibility**" - Title
change\
\
Change the paragraph to read as follows:\
\
"Payload unintentional emissions shall be limited to those levels
identified in SSP 30237 by the test limits of RE02, CE01, and CE03. The
payload must demonstrate that safety critical electrical equipment is
not susceptible to the Electromagnetic environment in its operating
location(s)."

**212.3** **Lasers** - Applicable with change\
\
Change "STS" to "ISS"\
\
Change "ICD-2-19001" to "NSTS 21000-IDD-ISS"

**212.4** **Optical Requirements** - Applicable

**213** **Electrical Systems** - Applicable

**213.1** **General** - Applicable with change\
\
Change "Orbiter" to "Orbiter/ISS"\
\
Insert the following two sentences between the first and second existing
sentences:\
\
"Circuit protective devices and wire sizes shall conform to the
requirements of SSP 57000, Pressurized Payload Interface Requirements
Document (IRD) or ISS approved International Partner equivalent, at the
payload power distribution interface with ISS. For payload power
distribution within the payload, circuit protective devices shall be
sized such that steady state currents in excess of those allowed by TM
102179 are precluded."

**213.2** **Batteries** - Applicable with change\
\
Change "STS" to "ISS" in two places\
Change "NSTS" to "PSRP"

**213.3** **Lightning** - Applicable with change\
\
Change "NSTS 07700, Volume XIV, Attachment 1 (ICD-2-19001)" to "NSTS
21000-IDD-ISS".

**214 Verification** - Applicable

**214.1 Mandatory Inspection Points (MIP's)** - Applicable

**214.2 Verification Tracking Log** - Applicable

**215 Hazardous Operations** - Applicable

**215.1** **Hazardous Identification** - Applicable with change\
\
Change "STS" to "STS/ISS"

**215.2** **Exposure to Risk** - Applicable with change\
\
Change "STS" to "STS/ISS"

**215.3** **Access** - Applicable

**216 Series Payloads and Reflown Hardware** - Applicable with

change

Change "STS" to "STS/ISS" in two places

**216.1 Recertification of Safety** - Applicable

**216.2 Previous Mission Safety Deficiencies** - Applicable with change\
\
Change "NSTS" to "PSRP"

**216.3 Limited Life Items** - Applicable with change\
\
Change "STS" to "ISS"

**216.4 Refurbishment** - Applicable

**216.5 Safety Waivers and Deviations** - Applicable with change\
\
Change "STS flight must be corrected" to "mission(s) or increment(s)
must be corrected after expiration of the waiver's effectivity and prior
to reflight."

**217** **Extravehicular Activity (EVA)** - Applicable with change

Add the following sentence to the existing paragraph:

"All ISS external attached payloads must design to the sharp edge,
protrusion and glove temperature requirements of NSTS 07700, Volume XIV,
Appendix 7, even if EVA is not planned or anticipated."

**218** **Payload Commanding** - Applicable

**219** **Flammable Atmosphere** - Applicable if not transported

within a pressurized volume

**220** **Crew Habitable Payloads**

\- through -

**220.9 Pressure Hull\
\
**The above paragraphs (220 through 220.9) are not applicable to Space
Station payloads.

**220.10** Added paragraph

**"220.10 Fire Protection"**

"Fire protection requirements reflect the operating environment that is
of extended duration with low personnel density in the habitable
volumes. These requirements are intended to be consistent with the
standard operational ISS crew responses where practical using
standardized design and operations approaches."

**"220.10a Fire Prevention"**

"(1) Control of potential fuels, oxidizers and flame propagation shall
be accomplished by compliance with the materials control requirements of
paragraph 209 above."

"(2) Friction, spontaneous combustion and other identifiable potential
ignition sources shall be controlled to not create a fire event. Proper
electrical power distribution design in accordance with paragraph 213
above shall be practiced for reduction of potential ignition sources."

**"220.10b Fire Event Detection"**

"Fire event detection is required to provide timely notification to the
crew of a fire event for all potential fire event locations within the
payload."

"(1) The preferred means of fire detection shall be by use of an
approved ISS rack smoke detector. Implementation of ISS rack smoke
detectors includes crew notification of a fire event by activation of a
Class I alarm via the ISS C&W system and interruption of power to the
affected rack. Subrack payload volumes must exchange air with the rack
volume if they are to be considered part of the general rack fire event
location covered by the rack smoke detector."

"(2) For potential payload fire event locations not covered by a rack
smoke detector, the payload must provide alternate means to assure an

undetected fire event does not occur. When a fire event (or precursor
condition) is detected by the alternate means, data shall be provided to
the ISS C&W and PCS systems for annunciation of the occurrence of the
event and to enable display of its location."

**"220.10c Fire Event Suppression"**

"The Payload shall include provisions to enable prompt control of fire
events, should one occur. Where fire extinguisher access ports are
provided, they shall be consistent with the ISS Portable Fire
Extinguishers. Provisions shall be included for removal of power and
termination of forced airflow when a confirmed event is detected. Where
power is removed by an automatic safing device, it shall not be
automatically re-applied. Sealed containers which can be shown to
preclude replenishment of oxygen and contain combustion effects and
products during a fire event may rely on self-extinguishment in lieu of
active-suppression."

**221** Added paragraph

**"221 Electrical Connections"**

"The design of electrical connectors shall make it impossible to
inadvertently reverse a connection or mate the wrong connectors if a
hazardous condition can be created. Payload and on-orbit support
equipment wire harnesses and connectors shall be designed such that no
blind connections or disconnections must be made during payload
installation, operation, removal, or maintenance on-orbit unless the
design includes scoop proof connectors or other protective features."

**222** **Design Features** - Added

**222.1** **Sharp Edges and Corner Protection\
\
**"Payload design within a pressurized module shall protect crewmembers
from sharp edges, protrusions, etc., during all crew operations.
Translation paths and adjacent equipment shall be designed to minimize
the possibility of entanglement or injury to crewmembers."

**222.2** Added paragraph\
\
**"222.2 Touch Temperatures\
**

**\
**Payloads within a pressurized module shall be designed such that the
crew will not be exposed to excessive high or low surface touch
temperatures."

**223** Added paragraph\
\
**"223 Hatch Drag-Throughs"\
**\
Routing of payload hardlines, cables, or hoses through an open crew
egress hatch is not permitted.

**CHAPTER 3: SYSTEM PROGRAM REQUIREMENTS**

**300** **General** - Applicable

**301** **Safety Analysis** - Applicable with change

Change "NSTS" to "PSRP"

**302 Hazard Levels** - Applicable

**302.1** **Critical Hazard** - Applicable with change\
\
Change "STS" to "ISS"\
Change "Orbiter" to "ISS"

**302.2** **Catastrophic Hazard** - Applicable with change\
\
Change "Orbiter" to "ISS"\
Change "STS" to "ISS"

**303 Hazard Reduction** - Applicable

**303.1 Design for Minimum Hazard** - Applicable

**303.2 Safety Devices** - Applicable

**303.3 Warning Devices** - Applicable

**303.4 Special Procedures** - Applicable

**304** **Safety Assessment Reviews and Safety Certification** -

Applicable with change

Delete "NSTS" in all locations except for its use associated with 13830.

**305** **Safety Compliance Data** - Applicable with changes:

Change "the STS" to "STS and ISS"\
\
Add the following:

"Integrated payload complement safety compliance data packages shall be
prepared by the rack integration organization."

**305.1** **For GSE and Ground Operations** - Applicable with change\
\
Delete "NSTS" in the first sentence

**305.2** **For Payload Design and Flight Operations** - Applicable with
change\
\
Change "NSTS flight operator" to "PSRP"

**305.3** **Past Phase III Compliance** - Applicable

**306 Mishap/Incident/Mission Failures Investigation and Reporting** -
Applicable