COMMISSION BRIEFING SLIDES/EXHIBITS

BRIEFING ON STATUS OF DAVIS BESSE

LESSONS LEARNED TASK FORCE ISSUES

FEBRUARY 26, 2004
I

STATUS OF

IMPLEMVENTATION OF

DAVIS-BESSE LESSONS

LEARNED TASK FORCE

RECOMMENDATIONS

Office of Nuclear Reactor

Regulation (NRR)

Office of Nuclear Regulatory

Research (RES)
Agenda

* Overview

* Stress Corrosion

Cracking

i Operating Experience

@ Inspection Program Management

e Barrier Integrity

e Summary

J. Dyer

W. Bateman

W. Beckner

S. Richards

N. Chokshi

J. Dyer

2
Overview

* Action Plans developed for 21

High Priority items (3/03)

- Responsible Office

- Schedule

- Resources

3
Overview (cont.)

* Remaining items integrated into

individual Office operational

activities via Planning,

Budgeting and Performance

Management (PBPM) process

* Status reported semiannually to

EDO and forwarded to

Commission

4
Overview (cont.)

* 23 recommendations were scheduled for completion by 12/03

16 were completed including all 7 scheduled high priority items - 7 lower priority rescheduled

* 22 recommendations are planned for completion by 12/04

* 5 recommendations are planned for completion by 12/05

* 6 recommendations TBD

ri
Stress Corrosion

Cracking (nCC)

LLTF recommendations

incorporated in Action Plan

-SCC and Boric Acid Corrosion

database

-SCC susceptibility model

evaluation

-ASME Code changes

-10 CFR 50.55a revision

- Inspection Program Guidance
Stress Corrosion

Cracking (cont.)

@ LLTF recommendations have

been combined with previously initiated actions

* Progress being made on

activities

* Industry response has been

generally positive

7
Stress Corrosion

Cracking (cont.)

* Activities completed and

ongoing since Davis-Besse

- Bulletin and follow-up questions on licensees' boric

acid corrosion control

programs (BL 2002-01)

- Regulatory Issues Summary (RIS 2002-13) summarizing staff review of responses to

BL 2002-01

8
Stress Corrosion

Cracking (cont.)

- Bulletin 2002-02 on upper head

penetration inspections

- Order EA-03-009 plus revision

on upper head inspections

9
Stress Corrosion

Cracking (cont.)

- Bulletin 2003-02 on lower

vessel head penetration

inspections

- Pressurizer Generic

Communication

10
Stress Corrosion

Cracking (cont.)

e Staff completed review and

evaluation of responses to

Bulletin 2002-01 regarding Boric

Acid Corrosion Control programs and published results in RIS

2003-13 (8103)

11
Stress Corrosion

Cracking (cont.)

* Bulletin 2002-02 on upper vessel

head penetration inspection was

precursor to the Order

* Interim requirements for

Reactor Pressure Vessel head

inspection issued through Order

EA-03-009 (2103)

12
Stress Corrosion

Cracking (cont.)

* Staff reviewing inspection results and processing requests for alternatives to Order

(Ongoing)

* Temporary Inspection Procedure TI 25151150 was

issued for regional inspector guidance (8/03)

13
Stress Corrosion

Cracking (cont.)

Bulletin 2003-02 issued after

discovery of leakage on bottom

head penetrations at South

Texas Project (8/03)

- TI 25151152 issued (11103)

- No additional cracking found in

inspections to date

IA
Stress Corrosion

Cracking (cont.)

e Staff and industry responding to

pressurizer heater sleeve leaks

- Staff developing generic

communication

- Westinghouse Owners Group

letter on inspection of

Combustion Engineering

pressurizer heater sleeves

15
Stress Corrosion

Cracking (cont.)

* RES activities related to SCC

- Integrated assessment to

support regulatory decisions/actions

- Components of research

programs

16
Stress Corrosion

Cracking (cont.)

- Cooperative programs

- Results used to support review and confirmation of

industry programs

17
Stress Corrosion

Cracking (cont.)

* Challenge: Replace interim

guidelines in Orders and Bulletins

with Rulemaking

- Endorsement of revised ASME

code

- Industry working on alternative

guidelines and technical

justification

18
Stress Corrosion

Cracking (cont.)

* Current plan

Incorporate Order into

1 0CFR50.55a

*Develop a rulemaking plan

-Also considering developing a

performance-based rule

*Needs detailed evaluation

19
Operating Experience

* Interoffice task force defined the

objectives and attributes of an

effective Operating Experience

program

- Report documenting specific

program improvement proposals issued in 11/03

20
Operating Experience

(cont.)

* Line management to develop implementation plan (4/04)

* Framework to be established by 12/04

- Program will be dynamic and

continuous improvements will

occur

21
Operating Experience

(cont.)

Key Findings/Recommendations

- Agency's current activities

contain necessary functions

- Clear vision lacking of how

activities should function

together to support licensing,

inspection and research

22
Operating Experience

(cont.)

* Recommends establishment of

clearinghouse within single

organization
Operating Experience

(cont.)

Improvements to date:

- Organizational alignment of

inspection and Operating

Experience programs

- Significant enhancement in webbased access

- Improved communications to

end users

94
Operating Experience

(cont.)

* Separately reviewing previous

generic communications to assess

effectiveness of commitments

- Initial screening completed (7/03)

- Selection of focus areas

completed with management

review and input (11/03)

- Verification Plan (3/04)

25
Operating Experience

(cont.)

* Implementation Challenges

- Resource intensive

- Effectiveness of interoffice

coordination

26
Inspection & Program

Management

* The LLTF recommended se,

changes including:

- More focused inspections follow-up to longstanding equipment issues

- Enhanced inspector traini

- Enhanced oversight struc'

for plants in extended out

(IMC 0350)

Feral

and

ng

ture

ages

27
Inspection & Program

Management (cont.)

* Inspection guidance was revised

to require resident inspector screening of all corrective action

items

* A new requirement was added to

inspection program to perform a

semi-annual trend review

focused on recurring equipment issues

28
Inspection & Program

Management (cont.)

e Program guidance was

enhanced regarding NRC

oversight of plants in extended

shutdowns

29
Inspection & Program

Management (cont.)

e A new "read and sign" training

program has been developed

and implemented

* Training modules completed

include boric acid corrosion,

stress corrosion cracking, and

the importance of maintaining a

questioning attitude

30
Inspection & Program

Management (cont.)

Guidelines were issued for

ensuring a more complete

documentation of important staff

decisions (3/03)

- Follow up effectiveness review

in progress

I1
Inspection & Program

Management (cont.)

* Challenges

- Need to enhance process for

timely incorporation of

operating experience into

inspection program

112
Barrier Integrity

The LLTF recommended that the

requirements for Reactor Coolant

System (RCS) leakage be improved

-Assure that plants do not

operate with Reactor Coolant

Pressure Boundary (RCPB) leakage

- Plants can discriminate between

unidentified leakage and RCPB

leakage

33
Barrier Integrity (cont.)

* Initiated research program at

Argonne National Laboratory (ANL) to develop technical basis for RCS

leakage requirements (7104)

* Identified units with nonstandard

RCPB leakage requirements (7/03)

34
Barrier Integrity (cont.)

e Identified improvements to existing Performance Indicators (P1) (6/04)

All leakage Technical

Specifications (TS) could be monitored by Pis and

compared to the allowable

limits

35
Barrier Integrity (cont.)

* Barrier Integrity Program at ANL

- Evaluate leak rates associated

with degradation of various

RCPB components (3/04)

- Develop database of leakage

events (4/04)

- Evaluate capabilities of

leakage detection systems

(5/04)

36
Barrier Integrity (cont.)

* Assess adequacy of plant alarm

response procedures (3/04)

e Develop recommendations for inspection guidance and RCS leakage requirements (3/05)

* Develop and, if feasible, implement Pi capable of tracking number, duration, and rate of primary system leaks (12/05)
Barrier Integrity (cont.)

* Completed preliminary scoping study of risk assessments involving passive component degradation

* Recommend multi-discipline review

to identify potential risk from

combination of failure mechanisms

and RCPB locations
Barrier Integrity (cont.)

* Technical basis will be used to

support potential revisions to

requirements using appropriate

regulatory processes

39
Summary

* Significant progress on

implementing recommendations

* Effort is integrated with other

activities*

- Ensures efficient and effective

use of resources

- Maximizes safety benefit

* Activities have resulted in

significant positive outcomes for

the agency and nuclear industry

40