Text

Commission Briefing on Davis-Besse Lltf Recommendations
	ML040690008
Person / Time
Site:	Davis Besse
Issue date:	02/26/2004
From:	; Office of Nuclear Reactor Regulation, Office of Nuclear Regulatory Research
To:	;
	Moroney B, NRR/DLPM, 415-3974
References
	Download: ML040690008 (40)
	v • d • e

STATUS OF IMPLEMENTATION OF DAVIS-BESSE LESSONS LEARNED TASK FORCE RECOMMENDATIONS Office of Nuclear Reactor Regulation (NRR)

Office of Nuclear Regulatory Research (RES)

Agenda

Overview J. Dyer

Stress Corrosion Cracking W. Bateman

Operating Experience W. Beckner

Inspection Program Management S. Richards

Barrier Integrity N. Chokshi

Summary 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 5

Stress Corrosion Cracking (SCC)

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 6

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.)

Staff completed review and evaluation of responses to Bulletin 2002-01 regarding Boric Acid Corrosion Control programs and published results in RIS 2003-13 (8/03) 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 (2/03) 12

Stress Corrosion Cracking (cont.)

Staff reviewing inspection results and processing requests for alternatives to Order (Ongoing)

Temporary Inspection Procedure TI 2515/150 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 2515/152 issued (11/03)

- No additional cracking found in inspections to date 14

Stress Corrosion Cracking (cont.)

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 10CFR50.55a

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

- Agencys 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 23

Operating Experience (cont.)

Improvements to date:

- Organizational alignment of inspection and Operating Experience programs

- Significant enhancement in web-based access

- Improved communications to end users 24

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 several changes including:

- More focused inspections and follow-up to longstanding equipment issues

- Enhanced inspector training

- Enhanced oversight structure for plants in extended outages (IMC 0350) 27