ML20210C650
| ML20210C650 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 09/12/1986 |
| From: | Allen C COMMONWEALTH EDISON CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| 2099K, NUDOCS 8609180392 | |
| Download: ML20210C650 (2) | |
Text
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- ,,, One Fwst Nanonal Plaza, Chee00, lHinois Address Hoply to: Post Omco Box 757 Chicago, Hlinois 80000 0767 September 12, 1986 Mr. Harold R. Denton, Director Office of Nuclear Reactor.' Regulation U.S. Nuclear. Regulatory Ocaunission 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:
This letter addresses commitments made in a telecon with members of your staff on September 8, 1986.. These commitments relate to the disassembly and inspection of SOR differential pressure switches found unacceptable for use at LaSalle County Station (LSCS).
Commonwealth Edison (CECO) stated that SOR differential pressure switches can be classified into one of three categories.
(a) Switches not installed for which testing revealed excessive static shift or repeatibility spread.
i (b) Switches which have been installed but not subjected to operating pressure.
(c) Switches which have been installed and subjected to operating pressure.
Based on the classification of these switches, CBCo will:
(1) Identify switches presently in each category for NRR.
(2) Switches found unacceptable for use at LaSalle will be disassembled and inspected in accordance with a procedure approved by CECO.
This inspection will examine switches for water which has seeped beyond the "O" rings, bearing corrosion or any other phenomena that may identify degradation that could contribute to switch performance.
8609180392 860912 PDR ADOCK 05000373 A 088 Q
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..-m Mr. H. R. Denton September 12, 1986 (3) SOR Inc. will be requested to disassemble and inspect category a) switches and provide report to CECO regarding their findings.
(4) Category b) and c) switches which can be decontaminated will be sent back to SOR Inc. for disassembly and inspection and CECO will submit report of inspection to NRR.
(5) Switches in category b) and c) which cannot be decontaminated will be' disassembled and inspected by CECO personnel in accordance with an approved procedure. Report to be submitted to NRR.
(6) Results of all inspections will be provided to NRR.
If you or your staff have any additional questions regarding this issue, please address them to this office.
Very truly yours, C. M. Allen Nuclear Licensing Administrator 1m i
Attachment cc:
G. Wright - RIII Dr. A. Bournia - NRR Resident Inspector - LSCS 2099K l
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