ML20083E110

Interim Deficiency Rept,Item E-47 Re Target Rock Solenoid Operated Valves Used in Essential Sys W/Excessive Space at End of Coil.Initially Reported on 830803.Replacement Kits on Order

ML20083E110
Person / Time
Site:	Zimmer
Issue date:	12/14/1983
From:	Williams J, Williams Jr CINCINNATI GAS & ELECTRIC CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
10CFR-050.55E, 10CFR-50.55E, E-47, LOZ-83-0243, LOZ-83-243, NUDOCS 8312280457
Download: ML20083E110 (3)

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TIIE CINCINNATI GAS & ELECTitIC COMI%NY c2T De$$$b"er' 1"d$ ^!bI3 LOZ-83-0243 J. WILLI AM S. J R scuson vect passeocht NUCLE AR OPtmattohs Docket No. 50-358 U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 Attention: Mr. J.G. Keppler Regional Administrator Gentlemen:

RE: WM. H. ZIMMER NUCLEAR POWER STATION - UNIT 1 10CFR50.55(e), ITEM E-47, TARGET ROCK SOLENOID VALVES W.O. 57300, JOB E-5590, FILE NO. 956C, E-47 This letter constitutes an interim report concerning the subject condition reported to the Commission on August 3, 1983, as a reportable deficiency under 10CFR50.55(e).

Target Rock Corporation reported a deficiency to CG&E concerning their solenoid operated valves provided for use in essential systems on the Zimmer Project. The defect consists of an excessive space at the end of the coil which allows the coil to move axially when the valve operates. This can cause the coil leads to rub on the housing and possibly cause an electrical short making the valve inoperable. We have previously determined that this is a reportable item.

We have received additional details on the materials of construction and testing procedure for the solenoid operated valves supplied by Target Rock Corporation. We have checked the materials to ensure that they are acceptable for use in the intended environment. All of the valves except one have been nualified to the environmental conditions based on their physical location within the plant. The one valve, tag number lIN171 has not aualified due to the fact that it is located inside the containment. That valve will be replaced.

On December 9, 1983 purchase orders were placed with Target Rock to provide kits for all the valves. Delivery is expected in 6 to 8 weeks.

8312280457 831214 gDRADOCK 050003g8 DEC 191983 l

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• Mr. J.G. Keppler Regional Administrator December 14, 1983 LOZ-83-0243 Page 2 Engineering Change Readest (ECR) 964 is being used to document, monitor and control this modification. Consistent with Zimmer procedures we will:

1. Prepare a Safety Evaluation Report (SER) .

2. Revise the vendor's instruction manual.

3. Review Test / Maintenance Procedures and provide appropriate revisions to assure that the modification kit is reinserted in the event that the valves are disassembled for any type of maintenance.

No other document changes.are recuired to complete this modification.

CG&E intends to reauest relaxation of the NRC November 12, 1982 " Order to Show Cause and Order Immediately Suspending Construction" to perform the modifications to these valves.

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

Very truly yours, THE CINCINNATI GAS & ELECTRIC COMPANY By - :=

. W LLIAMS, Jd SENIOR VICE PRESIDENT DJS/sfr

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Mr. J.G. Keppler Regional Administrator December 14, 1983 ,

LOZ-83-0243 Page 3 cc: NRC Office of Inspection & Enforcement Washington, D.C. 20555 NRC Resident Site Supervisor ATTN: W.M. Hill NRC Zimmer Project Inspector, Region III ATTN: E. R. Schweibinz 4

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