ML20114D225

Interim Deficiency Rept,Item 142 Re Failure of Two Target Rock Solenoid Valves.Initially Reported on 841213. Investigation of Cause,Scope & Necessary Corrective Action for Problem Continuing

ML20114D225
Person / Time
Site:	Fermi
Issue date:	01/11/1985
From:	Jens W DETROIT EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
142, EF2-70234, NUDOCS 8501310109
Download: ML20114D225 (2)

Text

_ _ _ _ _ . . _ _

Wayne H. Jens

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Vd Present h :g W Nuclear Operatens b l

I sdNonn wie monway Janary H , M M l g Newport, Echigan 48166 EF2-70234 '

s (313) 586-4150 l

Mr. James G. Keppler Regional Administrator Region III U. S . Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137

Reference:

Fermi 2 NRC Docket No. 50-341

Subject:

Interim Report of 10CFR50.55(e) Item 142

" Failure of Two Target Rock Solenoid Valves" On December 13, 1984, Detroit Edison's Mr. J. E. Conen, Engineer-Licensing, telephoned Mr. R. C. Knop of NRC Region III to report the improper operation of'2 dual coil solenoid valves manufactured by the Target Rock Corporation of E. Farmingdale, NY.. This deficiency is potentially report-able in accordance with the requirements of 10CFR50.55(e) and is being tracked as Item 142.

Description of Deficiency During the Primary Containment Integrated Leak Rate Test 2 Target Rock solenoid valves (E41-F402 and Ell-F415) were found to operate improperly. Each of these valves had remote position indication which showed the opposite of the true position of the valve. Additionally, operation of the

. valve actuators for these valves caused the valve to travel to the opposite position from that intended. Valve Ell-F415 isolates one of the drywell pressure instrument lines; valve E41-F402 isolates one of~the torus pressure / level instrument lines.

Reversed valve actuator operation appears to be peculiar to the Target Rock dual coil solenoid valve because of sensiti-vity of the valve to the polarity of the actuator coil. Ten of the 41 QA Level I Target Rock solenoid valves installed are the dual coil type.

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James G. Keppler January 11, 1985 EF2-70234 Page.2 Analysis of Safety Implications Target Rock dual solenoid valvet sre used to. isolate

, containment instrumentation lines related to the Reactor Protection' System and Emergency Core Cooling Systems.

Improper operation of these valves could affect plant safety.

Corrective Action Detroit Edison is' continuing its investigation of the cause, scope, and necessary-corrective action for'chis problem.

Another report, either interim or final, will be provided when additional information is available. If you have questions concerning this matter, please contact

- Mr. Lewis Bregni, (313) 586-5083.

Sincerely,

~

k7 cc: Mr. P. M. Byron Mr. R. C. DeYoung Mr..R. C. Knop

'US NRC Document Control Desk Washington,.D.C. 20555 s i

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