ML20040D879

Final Deficiency Rept Re Item M-31,defective Crosby Solenoid Actuated Safety Relief Valves.Faulty Valves Will Be Replaced W/Valves Qualified to Perform DBA Conditions.Corrective Action to Be Completed by 821231

ML20040D879
Person / Time
Site:	Zimmer
Issue date:	01/20/1982
From:	Borgmann E CINCINNATI GAS & ELECTRIC CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
10CFR-050.55E, 10CFR-50.55E, QA-1595, NUDOCS 8202020342
Download: ML20040D879 (2)

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---==y THE CINCINNATI GAS & ELECTRIC COMPANY sE- "

CINCINNATI OHIO 4520t January 20, 1982-QA-1595 E. A. BORGMANN sENsCR V6CE PREUDENT g

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'!l SiVgg z U. S. Nuclear Regulatory Commission 88J il Region III e, IO8 g 7 799 Roosevelt Road  ;, 4 ef Glen Ellyn, Illinois 60137 Attention: Mr. J. G. Keppler, Director glb(n p RE: WM .H . 7IMMER NUCLEAR POWER STATION UNIT I 10CFR50.55(e) - ITEM M-31, SRV SOLEN 0ID VALVE DEFECT - DOCKET No. 50-358, CONSTRUCTION PERMIT CPPR-88, W.O. #57300 JOB E-5590 FILE NO. NRC-8 .

Gentlemen:

This letter constitutes a final report regarding the subject deficiency initially reported to Mr. W. F. Christianson, of the NRC, as a potentially reportable deficiency under 10CFR50.55(e).

The subject deficiency was discovered when Wyle Labs was contracted by General Electric Company (GE), to perform environmental qualification tests on Crosby Solenoid Actuated Safety Relief Valves (SRV) . Wyle Labs has reported that in some cases, at design temperatures (340 F), these solenoid actuated valves fail to operate at the minimum allowable supply voltage.

Failure of these valves could result in the loss of availability of the low pressure ECCS systems which may adversely affect the safety of operations of the plant during its expected lifetime. This condition is considered to be reportable under the requirements of 10CFR50.55(e).

To correct this situation, CG&E will replace the faulty solenoid valves with valves qualified to perform at design-basis accident conditions. Implemen- '

tation of this corrective action is scheduled to be completed by December 31, 1982.

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'JAN 2 1982

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o TO: U. S. Nuclear Regulatory Commission January 20, 1982 i RE: Wm. H. Zimmer Nuclear Power Station Page 2 4

Unit 1 - 10CFR50.55(e) - Item M-31 SRV Solenoid Valve Defect l

We trust the above will be found acceptable as a final report

under 10CFR50.55(e).

Very truly yours,

, THE CINCINNATI GAS & ELECTRIC COMPANY By <

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E. A. BORGMANN J

EAB:plc 4 cc: NRC Resident Inspector ATTN: W. F. Christianson NRC Office of Inspection & Enforcement l Washington, D.C. 20555 i

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