ML20072Q710
| ML20072Q710 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 08/31/1994 |
| From: | Mcmeekin T DUKE POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9409120182 | |
| Download: ML20072Q710 (4) | |
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i DukePower Company T.C hicMu m SicGuire Nuclear Generation Department t' ice President 12 00HagersFerryRoad(h!G01\\P)
(IM)S754800 lidntersnile, NC280784985 (IN)8754809 Fax DUKEPOWER August 31,1994 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 Supplemental Reply to a Notice of Violation Gentlemen:
As a result of implementing a new computerized method to track NRC commitments on June 28,1994, a small number of overdue NRC commitments were identified which require supplemental responses to previously submitted Notice of Violation responses.
Enclosed is a supplemental response to the Notice of Violation issued May 3,1993 concerning failure to report a manual ESF actuation. The initial response to violation 50-370/93-05-01 was submitted on June 2,1993. An evaluation of current reportability guidance and methods, including a commercially available reportability determination system, has been performed. The commercial system evaluated was determined to be too generic, requiring customization foi station use and the system was not cost beneficial. An evaluation of current reportability guidance determined that appropriate guidance is provided in Nuclear System Directive (NSD) 202,10 CFR 50.72 Reports, but this guidance is not addressed in station procedure RP/0/A/5700/10, NRC Immediate Notification Requirements. These l
corrective actions were completed on July 21,1994. Section 3 of the attached supplemental response addresses the planned incorporation of appropriate NSD 202 reporting guidance into station procedure RP/0/A/5700/10 by October 10,1994.
These changes are reflected in the attached supplemental violation response. Should there be any questions concerning this response, contact Randy Cross at (704) 875-4179.
Very Truly Yours, f( M T. C. McMeekin Attachment
.b d 9409120182 940831 PDR ADOCK 05000369
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1 U. S. Nuclear Regulatory Commission August 31,1994 xc:
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Mr. S. D. Ebneter Mr. George Maxwell Regional Administrator, Region ll Senior Resident inspector U. S. Nuclear Regulatory Commission McGuire Nuclear Station 101 Marietta St., NW, Suite 2900 Atlanta, Georgia 30323 Mr. Victor Nerses Mr. Bob Martin U. S. Nuclear Regulatory Commission U. S. Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Office of Nuclear Reactor Regulation One White Flint North, Mail Stop 9H3 One White Flint North, Mail Stop 9H3 Washington, D. C. 20555 Washington, D. C. 20555 1
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McGuire Nuclear Station Supplemental Reply to a Notice of Violation l
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 of 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.
Repiv to Violation 370/93-05-01 l
1.
Reason 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. Cuntro! Room personnel, in response to a 75 gallon per minute leak on tha normal charging header, took corrective action as directed by the abnormal procedure for leakage within the capabilities of tha 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. The 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 j
reportable.
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Corrective steps that have been taken and the results achieved.
a.
The immediate corrective action was to reemphasize the importance of reviewing vt 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 reportability. The Shift Supervisor was unfamiliar with this directive and relied upon station specific procedures which were not sufficient to assure a proper reportability @ termination.
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, b.
An evaluation of current reportability guidance and methods, including a commercially available reportability determination system, was performed. The commercial system evaluated was determined to be too generic, requiring customization for station use and the system was not cost beneficial. An evaluation of current reportability guidance determined that appropriate guidance is provided in Nuclear System Directive (NSD) 202, 10 CFR 50.72 Reports, but this guidance is not addressed in station procedure RP!0/A/5700/10, NRC immediate Notification Requirements. This corrective action was completed on July 21,1994. Section 3 of this response addresses incorporation of NSD I
202 reporting guidance into procedure RP/0/A/5700/10.
No similar events have occurred since implementation of these corrective actions.
i 3.
Corrective steDs that will be taken to avoid further violations:
The appropriate reportability guidance contained in Nuclear System Directive 202 will be incorporated into station procedure RP/0/A/5700/10. This corrective action will be completed by j
October 10,1994.
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Date when full comoliance will be achieved:
McGuire Nuclear Station is now in full c.. apliance.
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