ML20206Q882
| ML20206Q882 | |
| Person / Time | |
|---|---|
| Site: | Braidwood  |
| Issue date: | 04/02/1987 |
| From: | Hunsader S COMMONWEALTH EDISON CO. |
| To: | Davis A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 2931K, NUDOCS 8704220057 | |
| Download: ML20206Q882 (2) | |
Text
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/ Address Reply to: Post Omco Box 767
\\d Chicago, Mnois 60690 0767 April 2, 1987 Mr. A. Bert Davis Acting Regional Administrator U. S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn. IL 60137
SUBJECT:
Braidwood Station Unit 2 10 CPR 50.55 (e) Interim Report Diesel Engine-Generator Rocker Arm Failure NRC Docket No. 50-457
REFERENCES:
(a)
S. C. Hunsader letter to A. B. Davis dated March 17, 1987
Dear Mr. Davis:
On February 17, 1987, the Commonwealth Edison Company notified your office of a potential deficiency reportable pursuant to 10 CFR 50.55(e) regarding the-subject failure at our Braidwood Station.
Reference (a) provided information concerning this matter to fulff.11 the thirty day reporting requirement.
For tracking purposuA. this deficiency was assigned Number 457/87-01.
The purpoce of this latter is to provide an interim report regarding an additional rocker arm failure.
Interim Report On March 29, 1987 after approximately 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of a scheduled 100 hour0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> run, the Braidwood 2B (2DGolKB) Diesel Generator experienced a rocker arm failure.
The failure mode is not readily identifiable, therefore a joint investigation is currently being conducted by Commonwealth Edison Company and Cooper-Bessemer.
The investigation encompasses both metallurgical analysis and mechanical interactions to further define the failure modes experienced.
This event is being included under the scope of 10CFR50.55(e) 457/87-01 and is considered an interim report.
An updated report is expected to be submitted by May 1, 1987.
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. Please address any questions that you or your staff may have concerning this matter to this office.
Very truly yours, hW N
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C. Hunsader Nuclear Licensing Administrator SCH/RCB/ jab cc: NRC Resident Inspector - Braidwood Director of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
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