ML20207J730
| ML20207J730 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 07/23/1986 |
| From: | Turbak M COMMONWEALTH EDISON CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| 1896K, NUDOCS 8607290237 | |
| Download: ML20207J730 (2) | |
Text
[mq) Commonwealth Edison One First N 'ional Plaza. Chicago,1:2nois
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/ Address Reply 12: Post Office Box 767 p,
's / Chicago, Illinois 60690 - 0767 July 23, 1986 Mr. Harold R. Denton U.S. Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Washington, DC.
20555
Subject:
LaSalle County Station Unit 2 Additional Information Regarding Differential Pressure Switches NRC Docket No. 50-374
Dear Mr. Denton:
At a meeting with your staff on July 18, 1986 Commonwealth Edison was asked to supply additional information concerning daily and two week test data for the Static-O-Ring differential pressure switchen.
The enclosed test data was obtained at the SOR factory.
The switches were calibrated at 1,000 psi static pressure and have been held at 1,000 psi since July 8, 1986.
Very truly yours, 1k.
M.
S.
Turbak Operating Plant Licensing Director
/klj cc:
R. Bernero T. Bournia Resident Inspector-LaSalle 1896K 8607290237 860723 0l DR ADOCK 05000374 0:
PDR j
t
o i
e ENCLOSURE Initial
+24 Hr 72 hrs
__r 96 hrs 2wk.
i r
1 j,
Switch #
7/8/86 7/9/86 7/11/86 7/14/86 7/18/86 7/22/86 7/23/86 Daily A 60.1/51.4 60.7/51.8 60.8/52.0 60.9/52.1 61.0/51.9 61.3/52.2 2 wk. A 56.0/48.7 60.0/52.4 60.4/52.9 All data in inches W.C.
}
Both switches have standard cross-shafts
- l l
Daily A was not cycled between 7/11/86-7/14/86 and 7/18/86-7/22/86 1896K 4
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