ML20116C941
| ML20116C941 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 10/30/1992 |
| From: | Skolds J SOUTH CAROLINA ELECTRIC & GAS CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| GL-88-20, NUDOCS 9211050104 | |
| Download: ML20116C941 (3) | |
Text
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South Carohne Electric & Gas Company John L. Skcids o
P O. Bon 88 Vice Prevdent JenkinsA SC 29065 Nuclear Operatons (803) 3454040
.SCE&G
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October 30, 1992 Document Control Desk U. S. Nuclear Regulatory Commission Washington, DC 20555 Attention:
Mr. George F. Wunder Gentlemen:
Subject:
VIRGIL C. SUMMER NUCLEAR STATION DOCKET NO. 50/395 OPERATING LICENSE NO. NPF-12 SCHEDULE FOR GENERIC LETTER 88-20, SUPPLEMENT 4 (LTR 880020)
In a letter dated June 26, 1992, the NRC requested that South Carolina Electric & Gas Company (SCE&G) reassess the schedule provided on December 20, 1991, for performance of the Individual Plant Examination for External Events (IPEEE).
SCE&G met with the NRC on August 12, 1992, to discuss some of the constraints in meeting the NRC requested completion date of June 1995, including a major outage in the fall of 1994 to replace steam generators.
In that meeting, the Staff expressed their goal to have substantially complete IPEEE results (i.e., identification of major plant vulnerabilities) by June 1995. The Staff also requested that SCE&G submit a more detailed IPEEE schedule showing specific activities and completion dates.
SCE&G has met with the contractor that will assist in performance of the IPEEE, and a detailed schedule has been developed considering contractor and SCE&G resources and available outages for conducting the containment walkdowns. A summary of key milestones and completion dates is pravided in the attachment. The original proposed schedule of October 1997 has been improved by almost one year. SCE&G plans to complete the Fire and Other External Events evaluations and a preliminary assessment for seismic vulnerabilities by April 1995. An interim report for the evaluations will be submitted by June 1995.
The goal for the interim seismic evaluation will be to identify to NRC possible seismic vulnerabilities. A final seismic report will be provided by December 1996.
The basis for the seismic schedule is:
1.
The seismic schedule is constrained by steam generator replacement activities and available plant outage time for conducting containment walkdowns. Refuel 8 (fall 1994) is the steam generator replacement outage. This will be the most complex outage conducted at V. C. Summer Nuclear Station, and management / control of outage activities will be crucial to a safe and successful outage. SCELG does not believe the final containment walkdowns can be conducted at this time because of the scope of work already defined for the outage (including numerous plant modifications) and the availability of the containment during the outage. The next ascilable outage for the walkdown is the spring of 1996.
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' Document Control Desk LlR 880020 Page 2 of 2 2.
In addition, major projects such as the steam generator renlacement effort and the IPE (scheduled for completion in June 1993) are utilizing experienced plant personnel in the structural / seismic, IPE, and shift engineering areas.
SCE&G wants to use these same individuals for portions of the :PEEE evaluation /walkdowns. Many of these people will be heavily involved in Refuel 8 outage management, modifications and startup testing precluding their participation in a containment wal down etfort.
In summary, SCE&G understands the importance of the IPEEE and wants to perform a comprehensive, high quality evaluation. SCE&G also wants to obtain-the maximum benefit possible from the project by involving our personnel in all aspects of the examination, llowever, other major projects already in progress affect plant and personnel availability for participation in the IPEEE. SCE&G would be happy to meet with NRC to discuss this issue further, if necessary.
l If you have any questions, please call April Rice (803) 345-4232 at your convenience.
Verytrulyyours)
-7 v7 whtiff4' John L. Stalds I
ARR:lcd Attachment c:
- 0. W. Dixon
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l R. R. Mahan (w/o attachment; i
R. J. White S. D. Ebneter G. F. Wunder l
General Managers NRC Resident inspector J..B. Knotts Jr.
B. S. Mullinax R. B. Whorton RTS (LlR 880020)
File (815.14)
A NUCLEAR EXCELLENCE - A SUMMER TRADlIION!
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IPEEE MILESTONES DESCRIPTION DATE A.
FTRE EVALUATION Complete initial fire area screening OCT. 1993 Complete compartment interaction analysis NOV. 1993 Complete fire ignition frequency evaluation NOV. 1993 Complete evaluation of fire-induced DEC. 1993 transients Resolve Fire Risk Scoping Study issues SEPT. 1993 Perform plant walkdown/ verification DEC. 1994 Complete draft of fire evaluation report APRIL 1995 B.
OTHER EXTERNAL EVENTS EVALUATION Complete high winds assessment APRIL 1994 Complete transportation and nearby facilities-MAY 1994 assessment Complete assessment of other external events JUNE 1994 except for flooding Complete flooding assessment NOV. 1994 Complete draft of other external events APRIL 1995 evaluation report C.
SEISMIC EVALUATION Develop response spectra JUNE 1993 Complete soils failure analysis JULY 1994 Select initial success paths JULY 1994 i
Perform screening walkdown DEC. 1994 Complete relay evaluation APRIL 1995 Complete draft interim seismic evaluation APRIL-1995' l
report Issue interim IPEEE submittal report to NRC JUNE 1995 Perform detailed seismic capability walkdown APRIL 1996 Complete analysis of HCLPFs for bottom one JUNE 1996 third of unscreened' components Complete draft final seismic evaluation NOV. 1996 report
_l Issue final IPEEE submittal report to NRC DEC. 1996
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