ML20215E658
| ML20215E658 | |
| Person / Time | |
|---|---|
| Issue date: | 12/05/1986 |
| From: | Heltemes C NRC OFFICE FOR ANALYSIS & EVALUATION OF OPERATIONAL DATA (AEOD) |
| To: | Lyon P INSTITUTE OF NUCLEAR POWER OPERATIONS |
| Shared Package | |
| ML20215E592 | List: |
| References | |
| TAC-R00141, TAC-R00142, TAC-R141, TAC-R142, NUDOCS 8612230058 | |
| Download: ML20215E658 (3) | |
Text
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Mr.-P;ttr W. Lyon, Group Vice President '
Analysis and Engineering Institute of Nuclear Power Operations
.1100 Circle 75 Parkway, Suite 1500 AE0D/C603 Atlanta, Georgia 30339
Dear Mr. Lyon:
SUBJECT:
CASE STUDY REPORT - A REVIEW 0F MOTOR-0PERATED VALVE PERFORMANCE The Office for Analysis and Evaluation of Operational Data (AE00) has finalized its case study on a review of motor-operated valve performance. The final report addresses the peer review comments provided by NRR, IE, RES, the Regions, INP0, NSAC, M0 VATS Inc., and Toledo Edison Company. The study report brings together previous NRC studies and other related documents (i.e., AE00
. reports and IE bulletins, circulars, and information notices), reviews approximately 1200 valve operator events (SCSS and NPRDS) from 1981 to mid-1985, and incorporates new data from an NRC valve testing program that utilized signature tracing techniques on valve assemblies in operating plants. We have enclosed a copy of our final report for your information and use as you may deem appropriate.
This study was performed in response to action item 6(1) of the actions directed by the Executive Director for Operations to respond to the NRC staff investigations of the June 9, 1985 event at Davis-Besse. Our case study report concludes that current methods and procedures at many operating plants are not adequate to assure that valves will operate when needed. Furthermore, the deficiencies would generally not be detected by existing plant procedures intended to assure operability, such as surveillance testin specifications and ASME Code Section XI inservice testing)g (plant technical or plant operator observations. Thus, assurance of valve operability appears to be strongly dependent upon diagnostic capability to assess and evaluate failures to operate so that root causes of failure--including switch setpoint--are correctly determined and proper changes implemented. Further, the issue of valve assembly performance and reliability is a complex subject that involves several technical disciplines.
The enclosed case study repor't contains several specific recommendations directed toward addressing valve assembly performance and reliability problems. We understand that the NRC Executive Director for Operations will request that NUMARC undertake appropriate industry initiatives to address the problems identified in the AE00 report.
8612230058 861205 PDR ORG NEXD PDR.
s Mr. Peter W. Lyon -2 A copy of the final case study report and this letter are being placed in the Public Document Room at 1717 H Street, N.W., Washington, D.C. 20555.
If you or your staff have any questions regarding this report, please contact Earl J. Brown of my staff. Dr. Brown can be reached at (301) 492-4437.
Sincerely, ons>dswe8 W c.J. m h C. J. Heltemes, Jr., Director Office for Analysis and Evaluation of Operational Data
Enclosure:
As stated cc w/ enclosure:
Z. Pate, INP0 D" BUTION:
M. Beaumont, W il C. Brinkman, EE AE0D SF R. Borsum, B&W AE0D CF L. Gifford, GE R0AB SF J. Jasper, CE Owner's Group ROAB CF L. Butterfield, W Owner's Group EBrown T. Pickens, GE Owner's Group MChiramal H. Tucker, B&W Owner's Group SRubin WLanning KBlack MWilliams FHebdon CHeltemes DHumenansky, OCM
- See next sheet for previous concurrence
- 0FC
- ROAB :ROAB:SC :ROAB:BC :AE00:JD :AEOD:D : :
- _ _ _ _ : _ _ _ _ _ _ _ _ _ _ _ _ : _ _ _ _ _ _ _ _ _ _ _ _ : _ _ _ _ _ _ _ _ _ _ _ _ : _ _ _ _k. , _ _ _ _ _ : _ (gq q )c _ _ _ _ _ : - _ _ _ _ _
- NAME :EBrown:nc :MChiramal :SRubin :FHebdon :CHE temes : :
._____:____________:____________:-___________: , L :________ ___:___________
DATE :12/ 4/86* :12/ 4/86* :12/ 4/86* :12/5/86 :12/1f/86 : :
OFFICIAL RECORD COPY
- -rf Mr. Pater W. Lyon A copy of the final case study report and this letter are being placed in the Public Document Room at 1717 H Street, N.W., Washington, D.C. 20555.
If you or your staff have any questions regarding this report, pl se contact Earl J. Brown of my staff. Dr. Brown can be reached at (301) 4 -4437.
C. J. Heltemes, Jr , Director Office for Analy s and Evaluation of Operationa Data
Enclosure:
As stated cc w/ enclosure:
Z. Pate, INP0 DISTRIBUT N:
M. Beaumont, W PDR C. Brinkman, EE AE0D S R..Borsum, B&W AE0D F L. Giffe d, GE R0A SF R. Wells, CE Owner's Group R0f CF L. Butterfield, W Owner's Group town T. Pickens, GE Owner's Group Chiramal H. Tucker, B&W Owner's Group SRubin WLanning i KBlack MWilliams FHebdon CHeltemes DHumenansky, OCM 0FC :RO B :ROAB:SC :ROAB:BC :AE00:DD :AE0D:D : :
_____:_. ______:_______ 4 :_________ _:____________:____________:____________:___________
NAME :EBrown:nc :MChiramal :SRubin :FHebdon :CHeltemes : :
DATE :12/'//86 :12/w /86 :12/4-/86 :12/ /86 :12/ /86 : :
i 0FFICIAL RECORD COPY
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