ML20234D940
| ML20234D940 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 09/16/1987 |
| From: | Gucwa L GEORGIA POWER CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| SL-3194, NUDOCS 8709220239 | |
| Download: ML20234D940 (5) | |
Text
' Geor'gla Power Company 333 Piedmont Avenue j
Atlanta, Georgia 30308 i
' Telephone 404 5264526 l'
Maihng Mdres?:...
Fbst Office Box 4545 1
Atlanta. Georgia 30302.
L Georgia Power L. T, Gucwa
' Ine southem eicdtre systerri
}
Manager Nuclear Safety j
and Licensing
]
SL-3194 0506m
'X7GJ17-V120 l
. September 16 1987-1 U. S. Nuclear Regulatory Commission ATTN:. Document' Control Desk Hashington, D.C.
20555 PLANT V0GTLE - UNIT 1 NRC DOCKET 50-424 OPERATING LICENSE NPF-68 RESPONSE TO NRC INSPECTION REPORT Gentlemen:
Georgia Power Company (GPC) - hereby. submits the enclosed revised response to NRC Inspection Report 50-424/87-31, which concerns. the inspection conducted by Messrs. J. F. Rogge and R. J. Schepens from ADH1 18 to May 22, 1987.
This revised response is submitted as a resu'.t 'of 1
discussions between by Messrs. H. V. Sinkule and H. E. Burns on August 20, 1987.
The enclosures to this letter contain a transcription of the NRC violation and GPC's response.
Please contact this office if you have any questions.
Sincerely, K % r L /c L. T. Gucwa-JH/im
Enclosures:
1.
NRC Violation 87-31-01 2.
Georgia Power Company Response c:.(see next page)
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B709220239 870916 A
PDR ADOCK 05000424'.
G PDRg
s GeorgiaPower A
- 1 U. S. Nuclear Regulatory Commission September 16,-1987 Page Two-c: Georaia Power Comoany Mr. R.'E. Conway.
Mr. J. P. O'Reilly Mr. G. Bockhold, Jr.
Mr. J. F. D'Amico Mr. C. H. Hayes GO-NORMS Southern Comoany Services Mr. R..A. Thomas l'
Mr. J. A. Bailey Shaw. Pittman. Potts & Trowbridae-Mr. B. H. Churchill, Attorney-at-Law Irgytman. Sanders. Lockerman & Ashmore Mr. A. H. Domby, Attorney-at-Law l
U. S. Nuclear Regulatory Commission l
L Dr. J. N. Grace, Regional Administrator Ms. M. A. Miller, Licensing Project Manager, NRR (2 copies)
Mr. J. F. Rogge, Senior Resident Inspector-0perations, Vogtle i
Georaians Aaainst Nuclear Enerav Mr. D. Feig Ms. C. Stangler I
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GeorgiaPower h I
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i ENCLOSURE 1 1
PLANT V0GTLE - UNIT 1 l
NRC DOCKET 50-424 l
OPERATING LICENSE.NPF-68 l
NRC VIOLATION 87-31-01 1
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l VIOLATION 50-424/87-31-01
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" Technical Specification 6.7.la requires that written procedures l
shall be established, implemented, and maintained. covering activities delineated in Appendix A of Regulatory Guide 1.33, Revision 2, February 1987.
Administrative Procedure 00350-C " Maintenance Program" establishes administrative controls for maintenance activities by providing 'for identification, control and documentation of maintenance activities.
Contrary to the above, on May 13, 1987, maintenance was performed on MSIV 1HV-30068 to correct a solenoid valve' hydraulic leak without an approved Maintenance Work Order detailing.the work instructions.
The failure to provide written ' instructions resulted in MSIV (1HV-3006B)
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closing when power to the solenoid valves was removed.
This resulted in a steam transient which caused a low-low level in the No. 1 steam generator and a subsequent reactor trip from 90 percent reactor power.
i This is a Severity Level IV violation (Supplement II)."
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0506m El-1 09/16/87 SL-3194 700775
GeorgiaPower d 1
l ENCLOSURE 2 PLANT V0GTLE - UNIT 1 NRC DOCKET 50-424 OPERATING LICENSE NPF-68.
1 RESPONSE TO NRC VIOLATION 87-31-01 l
l RESPONSE'TO VIOLATION 50-424/87-31-01 I
Admission or Denial of Alleaed Violation;.
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.The violation occured as stated in the inspection report.
j Reason for the-Violation:
ll The cause of the violation was inadequate work instructions for j
performing maintenance on Main Steam Isolation Valves (MSIVs) while operating at power.
The..MSIV disassembly procedure 26854-C,. MSIV Actuatoi Rockwell Type A Field Disassembly" does not address' performing.
maintenance of the MSIV in a fully open position.
Verbal work instructions (an emergency _ work order) were provided to the maintenance personnel to hydraulically block open the affected Main Steam Supply Line outboard MSIV.
However, the MSIV was mechanically blocked open and only one of the redundant hydraulic lines was blocked (isolated).
The power i
was subsequently removed from the MSIV, whereupon the mechanical block failed and the MSIV closed.
Corrective Steos Which Have Been Taken and Results Achieved:
The following corrective actions were taken subsequent to the event occurring:
(1) Procedure 00350-C, " Maintenance Program", has been revised to limit the use of " Emergency Maintenance" to those activities immediately necessary to maintain safe operation or shutdown capabilities.
A new category, " Urgent Maintenance", was created for activities less critical than emergency maintenance which still need to be performed within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
Initiation of a-Maintenance Hork Order is required prior to performing urgent maintenance.
(2) Guidelines describing proper methods to maintain valve position while performing maintenance on MSIV's have been established and~
provided to Work Planning for implementation.
Additionally, this action was expanded to include other critical valves in the main steam supply system (i.e., feedwater isolation valves).
0506m E2-1 09/16/87 SL-3194 700775.
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ENCLOSURE 2.(Continued)'
l RESPONSE TO NRC VIOLATION 87-31-01=
i-(3).The MSIV1 disassembly: procedure.-26854-C has been Drevised " to properly: sequence' the steps for hydraulically isolating the MSIV..
(4) Miscellaneous valves associated.with thei hydraulic operators.of:
the; MSIV'.s, and feedwater. Isolation ' valves -were. temporarily tagged subsequent to the event.
A permanent tag has since been:
installed on'these valves.
Corrective Steos Which Hill Be Taken to Prevent Further Violation:
j Corrective steps to prevent. recurrence :of.. violation: have already' been completed.
Date When Full Comoliance Has-Achieved:'
1 Full compliance was achieved with the approval and issuance of.
J revised procedure 00350-C on May 18, 1987 and procedure 26854-C on'-
June 12, 1987.
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