ML20054J462
| ML20054J462 | |
| Person / Time | |
|---|---|
| Issue date: | 05/28/1982 |
| From: | Michelson C NRC OFFICE FOR ANALYSIS & EVALUATION OF OPERATIONAL DATA (AEOD) |
| To: | Harold Denton, Deyoung R, Minogue R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE), Office of Nuclear Reactor Regulation, NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| Shared Package | |
| ML20042C755 | List: |
| References | |
| NUDOCS 8206290042 | |
| Download: ML20054J462 (2) | |
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MAY 2 81982 MEPORANDUM FOR: Harold R. Denton, Director Of fice of Nuclear Reactor Regulation Richard C. DeYoung, Director Of fice of Inspection and Enforcement Robert B. Minogue, Director Office of Nuclear Regulatory Research FROM:
Carlyle Michelson, Director Office for Analysis and Evaluation of Operational Data SUHJECT:
SURVEY OF VALVE OPERATOR-RELATED EVENTS OCCURRING DURING 1978, 1979, and 1980 Following completion of the peer review, we have completed our survey study (enclosure) of valve operator-related events occurring during i
1978,1979, and 1990. The study concentrates on motor-operator events reported in the licensee event report (LER) system during the three year period reviewed.
The survey report on valve operator-related events provides a brief sunnary of related previous reviews and :econnendations developed by both the U.S. Nuclear Regulatory Commission and industry groups; a review and evaluation of events that occurred during 1978,1979, and 1980; and suggestions and reconnendations that would lead to appropriate definition and/or resolution of problens discernible from operating experience. The investigation revealed that events could be grouped into three major Cdtegories which are torque switches, limit switches, and motor burnouts. ~
In addition, the results of the investigation indicate these three categories tend to be symptomatic representations of potential problems concerning valve assembly operability or functional qualification rather than dominant causes of inoperability; however, followup activities relating to these three categories could possibly lead to a determination of such causes.
Therefore, the safety concerns relate to effects of aging on operability, margin for operability, and availability for operation when needed.
I Although we do not consider this operational experience as evidence of hf immediate concern at operating plants, we do consider that the safety concern ag and associated implications need to be addressed. Therefore, the enclosed
/f g g report is forwarded for your information and appropriate action.
i 8206290042 820528
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Dp Hultiple Addressees 1
j If you have any questions regarding this report, please contact Earl J.
1 Brown or Frank S. Ashe of my staff. Mr. Brown can be reached at 492 4440 and Mr. Ashe at 492-44a2.
i Original Signed by Carlyle Michelson j
Carlyle Michelson, Director i
Office for Analysis and Evaluation for Operational Data 4
Enclosure:
As stated i
DGEisenhut, flRR RCHaynes, Region I l
RMattson, NRR JP0'Reilly, Region II l
RHVollner, NRR JGKeppler, Region III l
WVJohnston, NRR JTCollins, Region IV JPKnight, NRR RHEngelken, Region V Tippolito, NRR RLSpessard, Region III ZRosztoczy, NRR JFStreeter, Region III RJBosnak, NRR MRing, Region III FRosa, NRR DJW111ett, Region V MSrinivasan, NRR VStello, DEDROGR RJClark, flRR TNurley, DEDROGR j
EJordan. IE IE Training Center VThomas, IE JShea, IP RJKlessel, IE PCollins, NRR 4
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