ML20238A280

Forwards long-term Test Data from Static O-Ring Differential Pressure Switches Held at Pressure on Test Rig at Sor,Inc. Next Setpoint Readings Scheduled to Be Taken in Approx 1 Month.Data Current as of 870803

ML20238A280
Person / Time
Site:	LaSalle
Issue date:	08/21/1987
From:	Allen C COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
3479K, NUDOCS 8708310001
Download: ML20238A280 (3)

Text

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's C mm:nw.%lth Edison i

3 /' Address Reply to: Post Office Box 767 One First National Plaza, Chicago, Illinois

~V Chicago, Illinois 60690 0767 August 21, 1987 U.S. Nuclear Regulatory Commission Attn: Document Control Desk l

Washington, DC 20555

Subject:

LaSalle County Station Units 1 and 2 i

SOR Differential Pressure Switch l

Long Term Test Data l

NRC Docket Nos. 50-373 and 50-374 l

Dear Sir:

1 Attached is the most recent long term test data from the Static "O" Ring differential pressure switches held at pressure on the test rig at SOR Inc. This data is current as of August 3, 1987. The next setpoint readings are scheduled to be taken in approximately one month.

If you have any additional questions regarding this matter, please contact this office.

Very truly yours, C. M. Allen Nuclear Licensing Administrator 1m 9

cc:

P. Shemanski - NRR l

Region III Office l

NRC Resident Inspector - LSCS j

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l gh 3479K 8708310001 870821

//

PDR ADOCK 05000373

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ENCLOSURE.

SOR LONG TERM DATA FOR MODEL 103AS-B212 SWITCHES Date of Elapsed Switch Trip / Reset Values ("W.C) j Reading Time Sw; itch DA Switch 2A Switch 4A Switch 6A 7/8/86*

0 60.1/51.4 56.0/48.7 60.6/52.5-

'60.7/53.7 7/9/86 l~ Day 60.7/51.8 60'.0/52.4

~61.3/52.9 60.3/53.4 1

7/18/86 10 Day 61.0/51.9 7/23/86-2 weeks 61.3/52.2 60.4/52.9 7/29/86 3 weeks 61.4/52.3

.8/6/86 4 weeks 61.6/52.5 62.3/53.4 9/4/86 8 weeks 62.1/52.8 61.2/54.1 9/22/86 11 weeks 62.1/52.8 61.6/53.8 63.0/53.9 61.2/54.2 1

11/3/86 17 weeks 62.6/53.3 62.0/54.1 63.5/54.1 61.8/54.6 12/8/86 22 weeks 62.2/53.1 61.6/53.8 63.0/54.0 61.1/54.0 1/5/87 26 weeks 62.1/52.9 61.5/54.0 63.0/54.2 60.9/53.9 2/10/87 31 weeks 61.6/52.5 61.5/54.0 62.8/54.0 60.8/53.8 3/13/87 35 weeks 61.5/50.7 61.8/53.7 63.2/53.8 60.9/53.2 4/14/87 40 weeks 61.4/50.5 61.9/54.2 63.3/54.2 61.1/54.0 5/8/87 43 weeks-61.4/49.9 62.0/54.4 6?.4/54.3 61.1/54.0 6/8/87 48 weeks 61.4/49.7 62.0/54.4 63.5/54.4 61.3/54.4 7/6/87 52 weeks 61.3/49.7 61.9/54.4 63.5/54.5 61.2/54.4 8/3/87 56 weeks 61.3/49.8 61.8/54.5 63.6/54.7 61.4/54.7 i

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