TXX-6842, Interim Deficiency Rept CP-87-11 Re Defective Circuit Cards in Battery Chargers.Initially Reported on 870513.Addl Time Required to Assess Safety Significance of Condition & Reportability Per 10CFR50.55(e).Next Rept by 871218
| ML20235V284 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 10/09/1987 |
| From: | Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| CP-87-11, TXX-6842, NUDOCS 8710150074 | |
| Download: ML20235V284 (2) | |
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E Log # TXX-6842 l
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C' Ref # 10CFR50.55(e)
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nlELECTRIC October 9, 1987 Wmiam G. Coumil Fuyutive Vkt (4cwkne
.U. S. Nuclear Regulatory Commission
' Attn:
Document Control Desk Washington, D. C. 20555
SUBJECT:
' COMANCHE' PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET NO. 50-445 DEFECTIVE CIRCUIT CARDS IN BATTERY CHARGERS SDAR: CP-87-11 Gentlemen:
On May 13, 1987, we verbally notified your Mr. I. Barnes of failures experienced in station battery charger circuit cards manufactured by Power Conversion' Products, Inc. 'This is an interim report of a potentially reportable item under the provisions of 10CFR50.55(e). Our latest interim
-report was logged TXX-6646, dated August 14, 1987.
Additional time is required to assess the safety significance of this condition. 'Our evaluations will include:
1 1.
Discussions with the manufacturer regarding generic implications.
2.
Review of design requirements, including loading calculations.
3.
Survey of the history of failures of the chargers from other plants.
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Upon completion of these activities we will be able to determine the deportability of this deficiency under the provisions of 10CFR50.55(e).
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TXX-6842 October 9, 1987 Page 2 of 2 Our next report on this issue will be submitted no later than December 18, 1987.
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l Very truly yours, dt?Z W. G. Counsil WJH:tgj c-Mr. R. D. Martin, Region IV Resident Inspectors, CPSES (3)
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