ML20044H469
| ML20044H469 | |
| Person / Time | |
|---|---|
| Site: | Mcguire |
| Issue date: | 06/02/1993 |
| From: | Mcmeekin T DUKE POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9306090055 | |
| Download: ML20044H469 (3) | |
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Duhe Ibuvr Company T C Mwa:us McGuire Nuclear Generation Departmerst Vice President 12700 Hagers ferry Road (MGOIA)
(704)STS-4800 Hunterscille, hC 28078-8985 (704)S75-480.9 hx
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DUKEPOWER June 2,1993 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555
Subject:
McGuire Nuclear Station. Units 1 and 2 Docket Nos. 50-369 and 50-370 NRC inspection Report No. 50-369,370/93-05 Violation 50-370/93-05-01 Reply to a Notice of Violation Gentlemen:
Enc!csed is the response to the Notice of Violation issued May 3,1993 concerning failure to report a manual ESF actuation.
Should there be any questions concerning this response, contact Randy Cross at (704) 875-4179.
Very Truly Yours, U
tw T. C. McMeekin Attachment xc:
(w/ attachment)
Mr. P. K. VanDoom Mr. S. D. Ebneter NRC Senior Resident inspector Regional Administrator, Region 11 McGuire Nuclear Station U. S. Nuclear Regulatory Commission 101 Marietta St., NW, Suite 2900 Atlanta, Georgia 30323 Mr. T. A. Reed U. S. Nuclear Regulatory Commission Othce of Nuclear Reactor Regulation One White Flint North, Mail Stop 9H3 Washin0 ton, D. C. 20555 1
9305090555 930602 PDR ADOCK 05000370
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McGuiro Nuclear Station Reply to a Notice of Violation Violation 370/93-05-01 10 CFR 50.72 (b)(2)(ii) requires that a licensee notify the NRC as soon as practical and in all cases within four hours of the occurrence of any event or condition that results in a manual or automatic actuation of any engineered safety feature (ESF).
Contrary to the above, at 2:50 p.m. on March 22,1993, a fitting on the Unit 2 Chemical and Volume Control System failed, causing a reactor coolant leak 01 approximately 75 gallons per minute. A manual actuation of a second charging pump, an ESF pump, was initiated to control pressurizer level. The manual actuation was not reported to the NRC until 4:10 p.m. on March 23,1993.
This is a Severity Level IV (Supplement 1) violation applicable to Unit 2 only.
Rep!v to Violation 370/93-05-01 1.
R_gason for the violation:
The ESF actuation occurred in response to a primary system transient which necessitated the manual starting of a second charging pump to control pressurizer level. Control Room personnel failed to recognize that manually starting the second charging pump was considered a manual ESF actuation. Control Room personnel, in response to a 75 gallon per minute leak on the normal charging header, took corrective action as directed by the abnormd procedure for leakage within the capabilities of the charging pumps.
The Shift Supervisor directing activities in the Control Room during the transient made a conscientious effort to determine the reportability of this occurrence. Tho Shift Supervisor determined this transient not to be reportable based on the plant specific response procedure. The procedure states, in part, that a manual or automatic ESF actuation as a result of a valid signal is reportable. The Shift Supervisor was fully aware of plant conditions throughout the transient and was aware that had the leak not been isolated within fifteen minutes the station would have entered the Emergency Plan. The leak was isolated within the required time frame and no valid ESF signal occurred. However, the Shift Supervisor erred in determining that this event was not reportable.
2.
Corrective steps that have been taken and the results achieved:
t The immediate corrective action was to reemphasize the importance of reviewing all pertinent documentation prior to making a determination of reportability. The requirement to report the starting of the second charging pump is clearly stated in the Nuclear System Directive on reportabihty. The Shift Supervisor was unfamiliar with this directive and relied upon station specific procedures which were not sufficient to assure a proper reportability determination. Since this event, no additional errors in reportability determinations have occurred.
3.
Corrective steps that will be taken to avoid further violations:
McGuire Nuclear Station is evaluating current reportability guidance and methods including a commercially ava.!able reportability determination system which will enhance our ability to make timely and accurate determinations. The potential advantage of the system being considered is that it is event based rather than regulation based.
4.
Date when full compliance will be achieved:
A method of enhanced reportability determination will be in use by July 1,1994.
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