ML20246E807
| ML20246E807 | |
| Person / Time | |
|---|---|
| Issue date: | 05/05/1989 |
| From: | Novak T NRC OFFICE FOR ANALYSIS & EVALUATION OF OPERATIONAL DATA (AEOD) |
| To: | Morris B, Rossi C Office of Nuclear Reactor Regulation, NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| Shared Package | |
| ML19302D821 | List: |
| References | |
| AEOD-S901, NUDOCS 8905120028 | |
| Download: ML20246E807 (2) | |
Text
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[h g UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 l
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MEMORANDUM FOR: Bill Morris, Director Division of Regulatory Applications, RES l Charles E. Rossi, Director Division of Operational Assessment, NRR FROM: Thomas N. Novak, Director Division of Safety Programs, AE00 -
SUBJECT:
REVISED AEOD SPECIAL STUDY REPORT 400/S901
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AEOD special study report AE0D/S901, " Maintenance Problems at Nuclear Power Plants," was provided to you for information by my memorandum of February 23, 1989. We have revised and expanded the original report to incorporate additional data and analyses, and deleted certain information that, upon further review, can be replaced with information that more accurately reflects maintenance effectiveness. The revised report using the additional information presents clearer trends. Thus, the revised report updates and supersedes the previous version. I ain enclosing a ecpy of the revised report for your consideration and use.
The revised report includes a review of maintenance-related cause code data extracted from licensee event reports for 1985, 1986, 1987, and the first two quarters of 1988. Also included is an analysis of data related to maintenance problems from the NRC Performance Indicator (PI) program covering 1987 and 1988. Other data from the PI program related to maintenance, such as average forced outage rate and equipment forced outages, are also presented.
The revised report deletes previously used information from the NRC Nuclear Document System, since the trends in the maintenance related documents in the system most likely resulted from a combination of NRC and industry activities.
Some general conclusions from the expanded data analysis are:
The fraction of events attributable to maintenance deficiencies has remained relatively unchanged since 1985.
The distribution of causes for events that are included in the PI l program is similar to that for all events reported in LERs for the same period.
Industry performance in the area of maintenance at operating nuclear /
plants is showing a clear improving trend in the latter part of 1987 and in 1988. ,) ,
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j If you or your staff have any questions regarding the revised report, please contact Matthew Chiramal (492-4441) of my staff.
Mginal signed kt Thomas N. Novak, Director, Division of Safety Programs, AE0D
Enclosure:
As stated cc w/ enclosure:
L. Plisco, NRR T. Foley, NRR J. Roe, NRR A. Gody, NRR T. King, RES Di ibution:
ntral Files ROAB R/F EJordan JHeltemes TNovak VBenaroya JRosenthal :
MChiramal WLanning MTaylor PDR A.c N ROAB:DSP:AEOD R0 B:DSP:AE0D DSP:AEOD D . E0D MChiramal J enthal VBenaroya TNovak 5/g/89 5/ /89 5/ f/89 5/f789
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