ML20204H293
| ML20204H293 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 08/01/1986 |
| From: | Allen C COMMONWEALTH EDISON CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| 1944K, NUDOCS 8608080072 | |
| Download: ML20204H293 (2) | |
Text
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One Fir:1 N:donal Plan Chicago, Illinois 7 Address Reply to: Post Offica Box 767
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5 D Chicago, lilinois 60690 - 0767 August 1, 1986 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 Differential Pressure Switches NRC Docket Nos. 50-373 and 50-374
Dear Mr. Denton:
Based on conversations with your staff on July 31, 1986, we have attached to this letter five additional commitments with regard to our continued testing of SOR differential pressure switches at LaSalle County Station.
Very truly yours, a
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C. M. Allen Nuclear Licensing Administrator Im Attachment cc:
Dr. A. Bournia LaSalle Resident Inspector 8608090072 860001
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1944K PDR ADOCK 05000373 p
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ATTAC'9 EDIT 1.
When any SOR differential pressure switch calibration setpoint check indicates a change which equals or exceeds the reject limit, the licensee shall declare the component and the associated channel inoperable and take the appropriate actions required by the LaSalle County Station Unit 2 Technical Specifications, and the licensee shall report the incident in accordance with the requirements of 10 CFR 50.72 and 10 CFR 50.73.
2.
The increased frequency of surviellance calibration program which is conducted at atmosphere pressure, and the level drop tests, which are conducted at operating pressure for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, and which are to be performed during restart and during shutdown for the next refueling outage, shall demonstrate stability of the trip setpoint and shall confirm that the switches operate within the Technical Specification limits.
3.
The licensee shall continue performing its monthly channel Functional Test, in accordance with the LaSalle Technical Specifications.
4.
If one channel of a system of redundant channels (or similar equipment in redundant safety systems) is found to have an actual trip point that is outside the Technical Specifications or otherwise unacceptable for adequately reliable system operation, then the redundant channels (or similar equipment) shall be tested as soon as thereafter as practical.
5.
The licensee shall submit for staff review test results acquired through its periodic and increased surveillance calibration testing program and from the SOR Inc. long term testing of the SOR differential pressure switch as the data becomes available or when the LaSalle Unit 2 shuts l
down for the next refueling outage.
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1944K l