ML20197H123
| ML20197H123 | |
| Person / Time | |
|---|---|
| Issue date: | 04/17/1986 |
| From: | Heltemes C NRC OFFICE FOR ANALYSIS & EVALUATION OF OPERATIONAL DATA (AEOD) |
| To: | Harold Denton, Minogue R, Taylor J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE), Office of Nuclear Reactor Regulation, NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| Shared Package | |
| ML20197H126 | List: |
| References | |
| NUDOCS 8605190065 | |
| Download: ML20197H123 (2) | |
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1 APR 171986
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MEMORANDUM FOR: Harold R. Denton, Director Distribution Office of Nuclear Reactor Regulation -f)C5 - FUK AE0D CF James M. Taylor, Director ROAB CF Office of Inspection and Enforcement EBrown MChiramal Robert B. Minogue, Director KSeyfrit Office of Nuclear Pegulatory Research WLanning KBlack Thomas E. Murley, Regional Administrator, Region I Chief, PTB FHebdon J. Nelson Grace, Regional Administrator, Region II CHeltemes James G. Keppler, Regional Administrator, Region III Robert D. Martin, Regicnal Administrator, Pegion IV John B. Martin, Regional Administrator, Region V FROM: C. J. Heltemes, Jr., Director Office for Analysis and Evaluation of Operational Data
SUBJECT:
REQUEST FOR PEER REVIEW COMMENTS--PRELIMINARY CASE STUDY--
A REVIEW 0F MOTOR-0PERATED VALVE PERFORMANCE A preliminary case study on a review of motor operated valve performance in LWRs is enclosed. The review brings together previous NRC studies and documents (AEOD reports and IE bulletins, circulars, and information notices),
reviews over 1100 valve operator events (SCSS and NPRDS) from 1981 to the present, and incorporates new data from an NRC valve testing program that utilized signature tracing techniques on valves in operating plants. This report also responds to item 6(i) of the actions directed by the Executive Director for Operations to respond to the NRC staff investigations of the June 9, 1985 Davis-Besse event.
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 testing plant procedures technical intended to specifications andassure ASMEoperability, suchXIasinservice Code, Section surveillance testing) 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 setpoints--are correctly determined and proper changes implemented.
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The issue of valve performance and reliability is a complex subject that involves several technical disciplines. The report makes three recommendations.
In accordance with our " peer review" process prior to the finalization and distribution of our case study reports, we are providing NRR, IE, Regional Offices, RES, NSAC and INP0 with a copy of a preliminary report for review and comment, particularly regarding accuracy and completeness of the technical details. Changes to the findings, conclusions, and recommend 1tions will be considered only if the underlying information concerning the details of plant design or systems operation is in error. Therefore, comments are being solicited en the technical accuracy of the report. The findings, conclusions, and recommendations are provided for your information in order that you may understand the significance AE0D places on these events and, therefore, obtain a more complete picture of the total report. We would welcome comments either informally by telephone or formally by memorandum.
Since we wish to finalize and issue the report shortly, we ask that any comments be received by us within 30 days from receipt of the preliminary copy. Should your office require some additional time beyond that point, please let us know; otherwise, it will be assumed that there are no comments.
A copy of the preliminary report and this letter are being placed in the Public Document Room at 1717 H Street, N.W., Washington, D.C. 20555.
If you have any questions regarding this study, please feel free to contact Earl J. Brown of my staff. Dr. Brown can be reached at 492-4437.
M C. J. Heltemes, Jr., Director Office for Analysis and Evaluation of Operational Data
Enclosure:
As Stated cc w/ enclosure:
V. Stello, ED0 J. Richardson, RES D. Eisenhut, NRR J. Vora, RES P. Bernero, NRR G. Weidenhamer, RES F. Miraglia, NRR E. Jordan, IE H. Thompson, NRR R. Baer, IE T. Speis, NRR R. Kiessel, IE R. Bosnak, NRR J. Stolz, NRR W. Johnston, NRR A. DeAgazio, NRR B. Liaw, NRR I. Jackiw, P III R. Ballard, NRR P. Wohld, R III F. Cherney, NRR J. Page, NRR G. Arlotto, PES OFC :ROAB :SC: 0AB :C:ROAB f :D:#dOD v : : :
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NAME :EBrown:$j[z :MChiramal :KSeyfrit :CHeltemes : : :
DATE :02/1I/86 :02/IS/86 :02//A/86 :02/ U/86 : : -