TXX-7114, Final Deficiency Rept CP-87-84 Re Diesel Generator (DG) Secondary Meter & Relay CT Circuit Cable Leads.Initially Reported on 870903.Circuits Bypassed in DG Emergency Start. Issue Found Not Reportable,Per 10CFR50.55(e)
| ML20237E674 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 12/23/1987 |
| From: | Counsil W, John Marshall TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| CP-87-84, TXX-7114, NUDOCS 8712290121 | |
| Download: ML20237E674 (1) | |
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MEE log # TXX-7114
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File # 10110
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908.3 M1 ELECTRIC Ref. # 10CFR50.55(e)
December 23, 1987 Wimum G. Coumil Executin Vwe President U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. C.
20555
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET N05. 50-445 AND 50-446 DG SECONDARY METER AND RELAY CT CIRCUIT CABLE LEADS SDAR: CP-87-84 (FINAL REPORT)
Gentlemen:
l On September 3,1987, we verbally notified your Mr. H. S. Phillips of a deficiency involving long electric cable leads in the secondary meter and relay CT circuits for the emergency Diesel Generator which could result in inoperability of the protective relays in the circuit. Our most recent interim report was logged TXX-7035, dated December 18, 1987. After further i
evaluation we have determined that this item is not reportable. pursuant to 10CFR50.55(e).
Our evaluation of this issue has determined the ratio. error of 28.57%
discovered during preparation of calculation -16345-EE(B)-023-13G-0 could lead to improper operation of protective circuits for the diesel generator.
This could result in damage to the diesels if abnormal conditions occurred during-periodic and surveillance testing under normal plant operating conditions.
1 However, these circuits are automatically bypassed during an emergency start i
of the diesel generators, and would not have prevented them from performing the intended safety function.
We have concluded in the event this issue had remained uncorrected, no condition adverse to safety would have existed.
This issue is not reportable under the provisions of 10CFR50.55(e).
Records supporting this conclusion are available for your inspectors to review at the CPSES Project Site.
Very truly yours, b d - (o g n s 6 I W. G. Counsil By:
J. S. MarshalT Supervisor, Generic Licensing WJH/grr i
c - Mr. R. D. Martin, Region IV O
Resident Inspectors, CPSES (3) f-8712290121 871223 PDR ADOCK 05000445 IM North Olive Street LB SI Dallas, Texas 75201.
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