ML20245B563
| ML20245B563 | |
| Person / Time | |
|---|---|
| Issue date: | 04/03/1987 |
| From: | Hebdon F NRC OFFICE FOR ANALYSIS & EVALUATION OF OPERATIONAL DATA (AEOD) |
| To: | Jordan E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| Shared Package | |
| ML20245B564 | List: |
| References | |
| TASK-AE, TASK-E707 AEOD-E707, NUDOCS 8904260160 | |
| Download: ML20245B563 (2) | |
Text
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UNITED STATES NUCLEAR REGULATORY COMMIS!,10N I
,i WASHINGTON, D. C. 20655 April 3, 1987 AE0D/E707 MEMORANDUM FOR:
Edward L. Jordan, Director Division of Emergency Preparedness and Engineering Response Office of Inspection and Enforcement FROM:
Frederick J. Hebdon, Deputy Director Office for Analysis and Evaluation of Operational Data
SUBJECT:
DESIGN'AND CONSTRUCTION PROBLEMS AT OPERATING NUCLEAR PLANTS 4
A recently completed engineering evaluation report on the above subject is enclosed. The report identifies a significant number of licensee event reports involving design and construction deficiencies associated with safety-related systems at operating plants. These deficiencies were not detected by the plant QA or QC programs during plant construction or modification phase and had existed since. original startup or modification.
'Our evaluation indicates that the deficiencies identified could be attributed to inadequate document controls, unreviewed safety and design condition or inadequate review during modification, and the deficiencies can be grouped into six categories; (1) piping stress exceeding code limits, (2) incorrect hardware or improper installation of hardware, (3) lack of fire seals for electrical cable penetrations, (4) electrical wiring error, (5) errors in s..
electrical, instrumentation and control circuits, and (6) electrical and control panels not seismically supported. These were significant deficiencies in design and construction which could have posed potential hazards to the safety of plant operation had these remained uncorrected.
In each case the licensee discovered the deficiencies during a special review or inspection initiated due to reasons other than the requirements of the plant 0A or QC progrns. This indicates that the plant QA and OC prognms may t
not have been adequete to identify all existing design and construction problems, with the likelihood that there may be other undetected, significant cesign and construction deficiencies in operatir.g plants.
In view of this safety concern, it is suggested that IE issue an information notice to inform licensees of the potential safety concern of undetected
. design and construction deficiency in operating plants.
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8904260160 870403 PDR ORG NEXD PDC
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' If you have questions or comments, please do eat hesitate to contact me or Chuck Hsu (x24443) of my staff. We shall be nappy to meet with you or your
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staff to. discuss'this matter.
h.,
d Frederick J. Hetmon, Deputy Director Office for Analysis and Evaluation of Operational Data
Enclosure:
As stated cc w/ enclosure:
J. Taylor. IE
'R. Baer, IE M. Beaumont, W C. Brinkman,' EE R. Borsum, Bt.W L. Gifford, GE.
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Gwynn, OCM f
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