ML20095K468
| ML20095K468 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 12/22/1995 |
| From: | Mccoy C GEORGIA POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| LCV-0716-A, LCV-716-A, NUDOCS 9512290033 | |
| Download: ML20095K468 (3) | |
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Georgia Power Company 40 inverress Center Parkway Post Offce Box 1295 -
y Bema,J am. Alabama 35201 h
-g Telephone 205 877 7122 r
- c.K. uccoy Georgia Power Vce P,esdent, Nuclear Vogtle Project the Southem electrc system December 22, 1995 LCV-0716-A Docket No.
50-424
- 425 U. 3. Nuclear Regulatory Conunission ATTN
- Document Control Desk Washington, D. C. 20555 Ladies and Gentlemen:
VOGTLE ELECTRIC GENERATING PLANT REPLY TO A NOTICE OF VIOLATION Pursuant to 10 CFR 2.201, Georgia Power Company submits the enclosed information for Vogtle Electric Generating Plant in response to a violation identified in Nuclear
. Regulatoty Commission Inspection Reports 50-424,425/95-27, which documents the inspection conducted from October 22,1995, through November 18,1995.
Should you have any questions feel free to contact this office.
]
- Sincerel, C. K. McCoy CKM/AFS
Enclosure:
Reply to NOV 50-424,425/ 95-27-04 cc: Georgia Power Company Mr. J. B. Beasley, Jr.
Mr. M. Sheibani NORMS
.U. S. Nuclear Regulatory Commission
].. Afr. S. D. Ebneter, Regional Administrator g/ Mr. L. L. Wheeler, Licensing Project Manager, NRR Mr. C. L. Ogle, Senior Resident Inspector, Vogtle 7
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ENCLOSURE VOGTLE ELECTRIC GENERATING PLANT-UNITS 1 & 2 REPLY TO A NOTICE OF VIOLATION NRC INSPECTION REPORTS 50-424,425/ 95-27 The following is a transcription of the violation as cited in the Notice of Violation (NOV):
"During the NRC inspection conducted on October 22 through November 18,1995, a violation of NRC requirements was identified. In accordance with the ' General Statement of Policy and Procedure for NRC Enforcement Actions,' NUREG-1600 (60 FR 34381; June 30,1995), the violation is listed below.
10 CFR 50, Appendix B, Criterion XVI, Corrective Action, requires that corrective actions be taken to preclude repetition of significant conditions adverse to quality.
Contrary to the above, the licensee's corrective actions taken in response to two partially obstructed Nuclear Service Cooling Water System (NSCW) orifices detected in January 1995 were inadequate to preclude repetition. Specifically, six NSCW system orifices were found to be partially obstructed with debris between August 25,1995, and September 3,1995."
This is a Severity Level 1V violation (Supplement I).
RESPONSE TO VIOLATION (50-424.425/ 95-27-04)
Admission or Denial of the Violation:
This violation occurred as stated in the notice of violation.
Reason for the Violation:
Corrective actions planned to address the two partially obstructed Unit 2 NSCW orifices detected in January 1995 during NSCW cooler flow testing, included design changes for installing solid plates over the NSCW pump well gratings for Unit 2 and replacing the existing plates over the Unit 1 pump wells to provide complete coverage. In addition, basin screens between the pump and basin area, that were in place in Unit 2, were also planned to be installed in Unit 1. These corrective actions were scheduled for August 1995. These measures were intended to reduce the possible introduction of foreign material into the NSCW system. After discovery of the August 25,1995, low flow condition, Georgia Power Company decided to check flows on all safety-related NSCW small orifice motor / lube oil coolers. This led to the discovery of five additional low flow condP. ions caused by partially obstructed orifices which revealed that the problem was more 4
widespret.d than originally indicated by January 1995 flow test results. Subsequent reviews conducte.d by the design architect engineer indicated that the degraded flows to the motor and pump coolers did not have an adverse affect on operability of the components.
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ENCLOSURE VOGTLE ELECTRIC GENERATING PLANT-UNITS 1 & 2 REPLY TO NOTICE OF VIOLATION NRC INSPECTION REPORTS 50-424.425/ 95-27 Corrective Steps Which Have Been Taken and the Results Achieved:
1.
Plates have been installed over the pump well openings and kick plates and screens have been installed around the basin railing in order to reduce foreign material from entering the basin and pump shaft wells.
2.
Flow measurements were conducted for all safety-related NSCW small diameter orifice motor / lube oil coolers. A total of five coolers were identified with lower than desirable flows. These flow orifices were removed and the lines flushed of debris.
3.
A representative sample of NSCW tower basin walls have been inspected on each tower with no significant degradation noted. The NSCW basin floors were also vacuumed of debris.
Corrective Steps Which Will Be Taken to Avoid Further Violations:
1.
An expanded scope of Generic Letter 89-13 heat exchanger testing and inspections will be conducted during the upcoming 1R6 and 2R5 refueling outages currently scheduled to begin on March 3,1996, and September 15,1996, respectively 2.
Safety-related NSCW small diameter orifice motor / lube oil coolers will be removed and supply lines flushed by the end of the IR6 and 2R5 refueHng outages, currently scheduled to begin on March 3,1996 and September 15,1996, respectively.
3.
Flow testing on all safety-related NSCW small diameter motor / lube oil coolers will continue on a monthly basis until a high level of confidence exists that the source (s) of debris have been eliminated.
4.
A design change will be implemented by March 1,1996, to prevent debris introduction from the NSCW tower sump pump discharge.
5.
An engineering analysis will be completed by January 15,1996, to determine the source of the metallic debris found in some of the flow orifices. Ifit is determined that the NSCW pumps are the source of the debris, a pump inspection plan will be implemented beginning in January 1996.
Date When Full Compliance Will Be Achieved:
Full compliance was achieved on August 30,1995, when additional corrective actions were developed to address the debris in the NSCW system.
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