ML030150619
| ML030150619 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 01/14/2003 |
| From: | NRC/OCM, NRC Region 4 |
| To: | |
| References | |
| M030114B | |
| Download: ML030150619 (9) | |
Text
COMMISSION BRIEFING SLIDES/EXHIBITS BRIEFING ON NRC LESSONS LEARNED:
DAVIS-BESSE RVH DEGRADATION JANUARY 14, 2002
DAVIS-BESSE REACTOR VESSEL HEAD DEGRADATION LESSONS LEARNED TASK FORCE Art Howell, Director, DRP Region IV Lessons-Learned Task Force (LLTF)
Background
e Formed in May 2002
- Conducted an independent evaluation
- Conducted public meetings
- State of Ohio Observer I
LLTF Background Cont'd Reviewed:
- Reactor oversight process
- Regulatory processes
- Research activities
- International practices
- Generic Issues program LLTF Background Cont'd
"*Proposed recommendations for improvements
"*Final report issued in September 2002
"*NRC staff briefings ongoing
"*Briefed ACRS 4
2
Overview of Results
- Potential for this type of problem was previously recognized
- During 1990s, vessel head penetration axial nozzle cracking was not considered an immediate safety concern Overview of Results Cont'd
- Lessons-learned involving the unpredictability of boric acid induced corrosion rates were not well recognized 3
Overview of Results Cont'd
"*NRC and industry follow up of relevant operating experience
"*FirstEnergy attention to plant safety issues at Davis-Besse
"* NRC integration of information Overview of LLTF Recommendations
- Improve inspection guidance
- Assess effectiveness of operating experience review processes
- Encourage changes to ASME Code inspection requirements 4
Overview of LLTF Recommendations Cont'd
"*Conduct staff training
"*Assess leakage monitoring requirements and methods
"*Assess stress corrosion cracking and boric acid corrosion data 9
Overview of LLTF Recommendations Cont'd
"*Enhance licensing guidance and reinforce expectations
"*Assess effectiveness of actions stemming from previous NRC lessons-learned reviews 10 5
I EO 1Ce SENIOR MANAGEMENT REVIEW TEAM Carl J. Paperiello Deputy Executive Director for Materials, Research and State Programs Senior Management Review Team
- Formed October 3, 2002
- Reviewed the LLTF Report
- Developed plan to address LLTF recommendations I
Senior Management Review Team
"° Carl Paperiello, Chair
"*Samuel Collins, Director, NRR
"* Martin Virgilio, Director, NMSS
"*Ashok Thadani, Director, RES
"*Ellis Merschoff, Administrator, Region IV
"*Janice Moore, OGC 3
Senior Management Review Team
- Agreed with LLTF recommendations with two exceptions
- Prioritized recommendations 2
Senior Management Review Team
- Integrated LLTF recommendations into four overarching categories
- Proposed implementation time frames for high priority recommendations 3