ML20214X406
| ML20214X406 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 11/26/1986 |
| From: | Allen C COMMONWEALTH EDISON CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| 2448K, NUDOCS 8612110107 | |
| Download: ML20214X406 (3) | |
Text
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), One First Nabonal Plaza, Checa00. IEnois Address Reply to: Post OEco Box 767
%/ Chica00, IEnois 60600 - 0787 November 26, 1986 Mr. Harold R. De-an. 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 References (a):
M. S. Turbak letter to H. R. Denton dated July 23, 1986.
(b):
C. M. Allen letter to H. R. Denton dated August 20, 1986.
(c):
C. M. Allen letter to H. R. Denton dated September 10, 1986.
(d):
C. M. Allen to H. R. Denton dated October 14, 1986
Dear Mr. Denton:
As a follow-up to the referenced letters, we have provided the next sets 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 l
their calibrated settings.
The switch test format has been changed to simplify the data display and allow easier comparison of switch performance.
In the attached table, switches identified in the previous referenced letters are referred to as indicated below:
PREVIOUS PRESENT Daily "A" Switch DA 2 week "A" Switch 2A 4 week "A" Switch 4A 6 week "A" Switch 6A f
P lI II
Mr. H. R. Denton November 26, 1986 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.
Please direct any questions you may have regarding the above matter to this office.
Very truly yours, C. M. Allen Nuclear Licensing Administrator klj Attachments cc:
Dr. A. Bournia - NRR Region III Inspector - LSCS 2448K
I l
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A ENCLOSURE SOR LONG TERM TEST DATA FOR MODEL 103AS-B212 SWITCHES Date of Elapsed Switch Trip / Reset Values ("U.C.)
Reading Time Switch DA Switch 2A Switch 4A Switch 6A 7/8/86*
O 60.1/51.4 56.0/48.7 60.6/52.5 60.7/53.7 7/9/86 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 w2 eke 61.3/52.2 60.4/52.9 7/29/86 0 ;<eeks 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 61.3/54.2 11/3/86 17 weeks 62.6/53.3 62.0/54.1 63.5/54.1 61.8/54.6
- Initial Calibration 2449K