ML20085K636

Final Deficiency Rept 83-06 Re Asco Solenoid Valves in Control Rod Drive Sys.Initially Reported on 830912.Valves W/Defective Solenoid Plunger Housings Replaced & Spare Parts in Inventory Examined.Plant Operable

ML20085K636
Person / Time
Site:	LaSalle
Issue date:	10/12/1983
From:	Schroeder C COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
10CFR-050.55E, 10CFR-50.55E, 7452N, 83-06, 83-6, NUDOCS 8310210056
Download: ML20085K636 (2)

Text

• .

~

O Commonwealth Edison O#O one First Nationti Plaza, chicago. litanofs O Address Reply to: Post Office Box 767

( Chicago. Illinois 60690 October 12, 1983 Mr. James G. Keppler, Director Directorate of Inspection and Enforcement - Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137

Subject:

LaSalle County Station, Unit 2 10CFR50.55(e) Notification 83-06 Final Report, ASCO Solenoid Valves on CRD System.

NRC Docket No. 50-374

Reference:

(a) Telecon T.E. Watts, CECO to R. Walker, NRC Region III of September 12, 1983 (b) H.R. Peffer, G.E. to T.E. Watts, CECO letter dated October 11, 1983.

Dear Mr. Keppler:

Commonwealth Edison notified your office by reference (a) above of the status of the problems we experienced with ASCO solenoid valves installed in the CRD system at LaSalle Station.

It was indicated in the above referenced conversation that we would notify General Electric and proceed with our internal review.

Our review revealed that initially the ASCO solenoid valves as part of the CRD system had been tested and accepted from G.E.

Subsequently as part of routine preventive maintenance, the valves were updated with new solenoid plunger housings, due to the shelf life of certain components within the valves. It has been revealed by G.E. that some of these housings were defective as supplied from ASCO rendering the solenoid valve inoperable. The defective solenoid valves which were detected during our pre-operational test of the CRD system, hy/e been replaced and successfully tested in the system.

Finally, as corrective action, a survey of our storeroom spare parts is being conducted to ensure operability of any spares.

General Electric has indicated to us based upon their letter reference (b) that they are pursuing with ASCO and ASCO's subcontractor (who supplied the defective part) an evaluation of this discrepancy and is formulating preventive action procedures. G.E.

has also stated that a Service Information Letter (SIL) will be issued advising utilities to inspect the valve parts and recommends some form of test following valve refurbishment and prior to operation.

8310210056 831012 PDR ADOCK 05000374 OCT 141M3

.Z L= 2 9 '

O

r. .

We therefore conclude based upon our evaluation, corrective action and testing of the ASCO solenoid valves on the CRD system, the plant is operable.

To the best of my knowledge, and belief the statements contained herein are true and correct. In some respects these statements are not based on-my personal knowledge but upon information furnished by other Commonwealth Edison and contractor employees. Such information has been reviewed in accordance with Company practice and I believe it to be reliable.

If'you or your staff have any questions concerning this

-activity, please contact this office.

Very truly yours, lof}&93 C.W. Schroeder Nuclear Licensing Administrator cc: NRC Resident Inspector - LSCS Director of Inspection and Enforcement -

Washington, DC i

t-2

7452N l

l l

l l

l l

f

_ - - _ _ - . _ _ _ _ . . - _ - _ _ _ _ _ . _ . _ . _ - - _ _ . . _ . .