ML20055A560

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Interim Part 21 Rept Concerning Possible Failure of Motor Operator Anchor Darling Valves w/anti-rotation Devices If Set Screw on Stem Collar Loosens.Corrective Actions Being Considered.Final Rept to Be Submitted by 820831
ML20055A560
Person / Time
Site: Zimmer
Issue date: 07/08/1982
From: Borgmann E
CINCINNATI GAS & ELECTRIC CO.
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
REF-PT21-82-676-000 10CFR-50.55E, PT21-82-676, PT21-82-676-000, QA-1855, NUDOCS 8207190161
Download: ML20055A560 (1)


Text

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TIIB CINCINNATI GAS & ELECTRIC COMPANY ss '

CINCINNATI. OHIO 4 52ol July 8, 1982 QA-1855 C. A. BORG M AN N SENeOR VICE FRESIDENT E

U. S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 Attention: Mr. J. G. Keppler Regional Administrator RE: WM. H. ZIMMER NUCLEAR POWER STATION UNIT 1 10CFR50.55(e) - ITEM M ANCHOR-DARLING VALVES WITH ANTI-ROTATION DEVICES - DOCKET No. 50-358, CONSTRUCTION PERMIT NO. CPPR-88, W.O. #57300 JOB E-5590 FILE NO. NRC-8, M-42 Gentlemen:

This letter constitutes an interim report concerning the subject condition initially reported to the Commission under the requirements of 10CFR50.55(e).

CG&E Nonconformance Report #0-NPD-82-2140-E was generated which noted that motor operated Anchor-Darling valves with anti-rotational devices were subject to operational failure if the set screw holding the stem collar in place should loosen.

An engineering evaluation has determined that because this con-dition could potentially affect the safety of operations, this item is considered reportable.

The CG&E Nuclear Production Department is presently considering mea:sures for preventing such an occurrence. Among the corrective actions being considered is the staking of the set screw. A final determination of action to be taken will be made by August 31, 1982, at which time a final report will be suhnitted.

We trust the above will be found acceptable as an interim report under 10CFR50.55(e).

Very truly yours, 8207190161 82070s THE CINCINNATI GAS & ELECTRIC COMPANY DR ADOCK 05000358 PDR By h E. A. rgmann Senior Vice President q FKP:as k\

cc: NRC Office of Inspection & Enforcement /

Washington, D.C. 2055 NRC Senior Resident Inspector Attn: W. F. Christianson JUl. I 2 7982

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