ML19318A717

Responds to NRC Ltr Re Violations Noted in IE Insp Rept 50-358/79-36.Corrective actions:welded-in Relief Valves Properly Tagged & Equipment Will Be Obtained for Verifying Relief Valve Set Pressures

ML19318A717
Person / Time
Site:	Zimmer
Issue date:	05/05/1980
From:	Borgmann E CINCINNATI GAS & ELECTRIC CO.
To:	Heishman R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19318A715	List: ML19318A717
References
QA-1290, NUDOCS 8006240064
Download: ML19318A717 (2)

Text

F .

~

. -r THE CINCINNATI GAS & ELECTRIC COMPANY db ~ h~

CINCINN ATi. OHIO 4 5201 y ds Pm s os s.

May 5, 1980

, QA-1290 U. S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 Attention: Mr. R. F. Heishman, Chief Reactor Operations and Nuclear Support Branch RE: WM. H. ZIMMER NUCLEAR POWER STATION - UNIT I I.E. INSPECTION REPORT #79-36, DOCKET NO.

50-358, CONSTRUCTION PERMIT CPPR-88, W.0. #

57300-957, JOB E-5590 Gentlemen:

This letter constitutes our formal reply to open item #3 identified in the referenced report concerning set pressures on relief valves in safety systems.

A) An investigation of construction practices during hydro-static testing of safety systems revealed no evidence to support that the set pressures of the relief valves had been changed. This investigation revealed that documenta-tion existed to support that the relief valves were, in fact, removed from the system and/or the piping blind flanged. Welded-in relief valves were properly " gagged".

B) A survey of all relief valves in safety systems was conducted to determine which valves had broken or missing set pressure seals. All valves which have broken seals have been identified on Nonconformance Reports.

C) The Electric Production Department is currently obtaining suitable equipment for verifying relief valve set pressures and will verify the set pressure of all safety-related relief valves prior to completion of each system preoperational test. The Station Quality Engineer will k ,. 4

% 90 8006240

• Mr. R. F. Heishman U. S. Nucics'r Regulatory Commission 1 -

Regicn III

- May 5, 1980 - QA-1290

, Page 2 verify that this action is taken prior to final system acceptance.

We trust the above actions will resolve this open item.

Very truly yours.

THE CINCINNATI GAS & ELECTRIC COMPANY By F#~

E. A. BORGMAN SENIOR VICE PRESIDENT JRS:pa

- .