ML20207Q037

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Forwards Static O-Ring long-term Test Data for Model 103AS- B212 Switches as Followup to .Model 212 Switches Held at 1,000 Psig & Cycled at Different Intervals to Monitor Variances in Trip Actuations from Calibr Settings
ML20207Q037
Person / Time
Site: LaSalle  Constellation icon.png
Issue date: 01/16/1987
From: Allen C
COMMONWEALTH EDISON CO.
To: Harold Denton
Office of Nuclear Reactor Regulation
References
2614K, NUDOCS 8701210174
Download: ML20207Q037 (2)


Text

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j / ComHMNlwealth Edison l Ji One First National Plaza, Chicago, Illinois

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Address Reply tr.: Post Omce Box 767

\s Chicago, Ilknots 60690 - 0767 January 16, 1987 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555

Subject:

LaSalle county Station Units 1 and 2 SOR, Inc. Long Term Test Data NRC Docket Nos. 50-373 and 50-374 Reference (a): M. S. Turbak letter to H. R. Denton dated July 23, 1986.

Dear Mr. Denton:

As a follow-up to the referenced letter, we have provided the r. ext set of data from the subject test. In this test, switches of the Model 212 series (7 - 100" W.C. adjustable range) are being held at 1000 psig and are cycled at different intervals to monitor variances in trip actuations from their calibrated settings.

l This program is planned to continue for a total duration of eighteen months. Further results will be reported to you as received from Static "O" Ring Inc.

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Please direct any questions you may have regarding the above matter to this office.

Very truly yours, i

C. M. Allen Nuclear Licensing Administrator 1m l Attachments cc: Dr. A. Bournia - NRR Region III Inspector - LSCS Regional Administrator - RIII G. Wright - RIII

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2614K 1 8701210174 870116 PDR ADOCK 05000373 '

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ENCLOSURE SOR LONG TERM TEST DATA FOR MODEL 103AS-B212 SWITCHES Date of Elapsed Switch Trip / Reset Values ("W.C.)

Reading Time Switch DA Switch 2A Switch 4A Switch 6A 7/08/86* O 60.1/51.4 56.0/48.7 60.6/52.5 60.7/53.7 7/09/86 1 day 60.7/51.8 60.0/52.4 61.3/52.9 60.3/53.4 7/18/86 10 days 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 8/06/86 4 weeks 61.6/52.5 62.3/53.4 9/04/86 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 61.3/54.2 11/03/86 17 weeks 62.6/53.3 62.0/54.1 63.5/54.1 61.8/54.6 12/08/86 22 weeks 62.2/53.1 61.6/53.8 63.0/54.0 61.1/54.0 1/05/87 26 weeks 62.1/52.9 61.5/54.0 63.0/54.2 60.9/53.9

  • Initial Calibration l

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