ML20072P731

Revised Final Deficiency Rept 81-06 Re Crosby Safety Relief Valve IMF-2 Solenoid Valve.Solenoids Have Had Qualified Collet/Yoke Assembly Installed,Closing Out Undervoltage Concern.Valves Qualified Per NUREG-0588

ML20072P731
Person / Time
Site:	LaSalle
Issue date:	03/30/1983
From:	Schroeder C COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
RTR-NUREG-0588, RTR-NUREG-588 10CFR-050.55E, 10CFR-50.55E, 6299N, 81-06, 81-6, NUDOCS 8304040360
Download: ML20072P731 (2)

Text

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[C 'S2 Commonwealth Edison f Ons First National Pizza, Chicago, Ilknois kC j Address Reply to: Pos: Office Box 7(f7 (j Chicago. tilinois 60690 March 30, 1983 4

Mr. James G. Keppler, Regional Administrator Directorate of Inspection and Enforcement - Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137

Subject:

LaSalle County Station, Units 1 and 2 Crosby SRV Solenoid Valves 10 CFR 50.55(e)

Revised Final Report #81-06 NRC Docket Nos. 50-373 and 50-374

Reference:

(a): C.E. Sargent letter to J.G. Keppler dated December 15, 1981.

(b): C.E. Sargent letter to J.G. Keppler dated November 19, 1981.

(c): C.E. Sargent letter to J.G. Keppler dated February 9, 1982.

(d): C.W. Schroeder letter to J.G. Keppler dated March 24, 1982.

Dear Mr. Keppler:

The purpose of this letter is to provide a revised status of the Crosby SRV Solenoid Valve 10 CFR 50.55(e) report.

As described in Reference (b), the final resolution to the Crosby Solenoid Valve qualification problem was pursued in parallel paths; one included modification of the collet / yoke assembly which resulted in the Crosby Model IMF-2 solenoid that has a qualified life per NUREG 0588 Cat. II of over 10 years. That model solenoid was installed on Unit 1 and will be initially installed on Unit 2 at LaSalle. The other path was the development of a long-term solenoid without active elastomer parts but with a weld-sealed body. This long-term solenoid potentially has lifetimes of 20 to 40 years.

The qualification of this Crosby solenoid has not been completed because of difficulties in establishing the seal at the electrical cable entry into the solenoid body. Testing is still progressing at the vendor's development laboratory. It is unlikely that this long-term solenoid will be ready for the initial installation on Unit 2, hence recourse was made to the IMF-2 solenoid for original installation on Unit

2. These IMF-2's are being delivered at LaSalle during 4pril 1983.

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J. G. Keppler March 30, 1983 The purpose of this letter is to closecut the 10 CFR 50.55(e) report which related to the original solenoids (pre-IMF-2's) that had the under voltage problem. Closure is based upon the fact that the IMF-2's corrected the undervoltage problem and that they are qualified per NUREG 0588 for sufficient lifetime to operate beyond the first two fuel cycles.

A secondary purpose is to update Reference (d) to assure the Commission that qualified solenoids are utilized on LaSalle 2 safety relief valves even though the planned long-term (40 year) solenoids are still in developmental testing. The EQ Binder (EQ-LS-041) at the station contains the detailed maintenance and surveillance requirements to assure the retention of qualified solenoids on these safety relief valves.

All IMF-2 solenoids have the qualified collet / yoke assembly installed in them, hence the closure of the undervoltage concern. This modification and the manufacturer's testing to IEEE 323 (1971) qualifies these valves for plant operation under NUREG 0588 Cat. II standards.

l If there are any further questions in this regard, please l contact this office.

Very truly yours,

[

l C.W. Schroeder

'3/50/B}

Nuclear Licensing Administrator l GRC/bmb/lm cc: Director of Inspection and Enforcement - Washington, D.C.

Region III Inspector - LSCS 6299N 1

i l

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