ML20207L603
| ML20207L603 | |
| Person / Time | |
|---|---|
| Site: | Braidwood  |
| Issue date: | 04/18/1986 |
| From: | Farrar D COMMONWEALTH EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 1597K, NUDOCS 8701120253 | |
| Download: ML20207L603 (2) | |
Text
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"N Commonwealth E:~ son
~ ) one First Nitional Plaza. Chicago. Ilknois O ] Address Reply to: Post Office Box 767 Q Chicago, Illinois 60690 April 18, 1986 Mr. James G. Keppler Regional Administrator Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137
SUBJECT:
Braidwood Station Units 1 and 2 Supplemental Response to Inspection Report Nos.
50-456/85-048 and 50-457/85-047
REFERENCES:
(a) J.J. Harrison letter to C. Reed dated January 27, 1986 (b) D.L. Farrar letter to J. Keppler dated March 11, 1986
Dear Mr. Keppler:
This letter is written in regard to an oversight that was identified in the Match 11, 1986 document referenced above.
Specifically, Violation 456/85-048-01; 457/85-047-01, in the section titled " Corrective Action Taken and Results Achieved", a change to the first sentence should be noted.
The reference to limit switches in this sentence should in fact read torque switches.
This change is as indicated in the enclosure provided.
If you have any questions on this matter, please direct them to this office.
Very truly yours, 14 6 '
D.L. Farrar Director of Nuclear Licensing DLF/pav Enclosure cc:
NRC Resident Inspector - Braidwood 1597K I
MAY 8 1986 I
l
7 t
SUPPLEMENTAL RESPONSE 456/85-048-01: 457/85-047-01 Also, at the time of the inspection, it appears that some confusion existed in the "as found" settings of ISI8807B torque switch.
Subsequent verification by OAD indicated the valve was indeed set in agreement with the applicable Motor Form 1 data sheet.
Hand cranking of the valve using the valve hand wheel did not cause rotors two and four to actuate, but subsequent stroking of the valve electrically, produced switch motor operation.
The number two and four rotors were re-adjusted at that time to allow increased stem travel after limit switch operation.
Corrective Action Taken and Results Achieved To insure accurate settings for all motor operated valve torque switches, a review of the Braidwood motor operated valve settings is being undertaken at Sargent & Lundy to provide a comprehensive listing of the approved settings for each installation.
Upon receipt of this listing, it will be transmitted to OAD for verification that "as set" values comply with engineering supplied values.
Any discrepancies will be corrected and documented by OAD field personnel.
Certain valves in the RHR, CVCS and SI systems will be functionally tested and baseline data recorded during preoperational testing.
This testing and data is to be taken while the valves are being tested under full system flow and pressure.
Corrective Action Taken to Avoid Further Violation A list of attributes used for the initial set up of valve limit switches has been established and incorporated into the OAD work practices and training instructions.
The incorporation of these attributes will assure consistency in the technique used by personnel involved with the initial set up of valve motor operators.
Date when Full Compliance will be Achieved The approved settings for motor operated valves from the Architect Engineer, Sargent & Lundy, is expected by May 15, 1986.
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