ML20151H376
| ML20151H376 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 04/13/1988 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20151H371 | List: |
| References | |
| NUDOCS 8804200367 | |
| Download: ML20151H376 (3) | |
Text
8
'o UNITED STATES 8
NUCLEAR REGULATORY COMMISSION o
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WASHINGTON, D. C. 20555
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SAFETY EVALUAT!0N BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMENDMENT NO 69 TO FACILITY OPERATING LICENSE NO. NPF-12 SOUTH CAROLINA ELECTRIC & GAS COMPANY SOUTH CAROLINA PUBLIC SERVICE AUTHORITY VIRGIL C. SUMMER NUCLEAR STATION, UNIT NO. 1 DOCKET NO. 50-395 INTRODUCTION By letter dated January 20, 1987, South Carolina Electric and Gas Company (the licensee) raquested a change to the Virgil C. Sumer Nuclear Station Reactor Building Cooling System Technical Specification Surveillance Reouirement 4.5.2.3.b.2.
The proposed change would lower the minimum flow rate to the Reactor Building Cooling Unit (RBCU).
The basis for the change is the modi-fication of the RBCU service water outlet valves (XVG-3109 A, B, C, and D) from non-active to active motor-cperated valves, with automatic controls to open the valves on the selected post-accident RBCU and close the valves on the non-selected RBCV. This system modification is fully described in the January 20, 1987 application, as supplemented February 24, 1987. The supplemental letter provided additional infornution that did not change the requested amendment; therefore, this applicotiun was not renoticed in the Federal Register.
EVALUATION The Reactor Building Cooling System is designed to have only RBCU and its associated fan, in each train, in service during a Design Basis Accident (DBA). Since the existing RBCU service water outlet valves are not assumed to be capable of operation following an accident, the service water flows through both the operating and non-operating RBCV.
Thus, the present Technical Specification flow requirement is for 200% (4000 gpm) of the required cooling water flow in order to assure that the operating RBCU has sufficient cooling water during an accident situation.
The modification will upgrade the RBCU service water outlet valves to environmentally qualified Class IE motor operated valves, with the automati: operation described above.
Since these valves are being upgraded to be capable of operation following an accident, there is no need to assure that there is a 200% service water flow to each RBCV.
Based on the foregoing discussion, the staff finds the modification to the RBCU service water outlet valves and the prescribed change to the Virgil C.
Sumer Technical Specification Surveillance Requirement 4.6.2.3.b.2, to be consistent with the guidelines of Standaro Review Plan Sections 6.2.2 and 9.2.1 and is, therefore, acceptable.
1 8804200367 000413 ADOCK ObOO ]5 DR J
. ENVIRONMENTAL CONSIDERATION This amendment involves a change in the installation of a facility ccmponent located within the restricted area as defined in 10 CFR Part 20 and a change to a surveillance requirement.
The staff has determined that the amendment involves no significant increase in the amounts, and no significant change in the types, of any effluents that may be released offsite, and that there is no significant increase in individual or cumulative occupational radiation exposure.
The Commission has previously issued a proposed finding that this amendment involves no significant hazards consideration, and there has been no public coment on such finding.
Accordingly, this amendment meets the eligibility criteria for categorical exclusion set forth in 10 CFR 51.22(c)(9).
Pursuant to 10 CFR 51.22(b) no environmental impact statement or enviror. mental assessment need be prepared in connection with the issuance of this amendment.
CONCLUSION The Commission made a proposed determination that this amendment involves no significant hazards consideration, which was published in a February 26, 1987 Federal Register Notice (52 FR 5869) and consulted with the State of South Carolina. No public corrnents were received, and the State of South Carolina did not have any comments.
We have concluded, based on the considerations discussed above, that:
(1) there is reasonable assurance that the health and safety of the will not be endangered by operation in the proposed nanner, and (2) public such activities will be conducted in compliance with the Commission's regulations and the issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public.
Principal Contributors:
J. B. Hopkins R. J. Giardina Dated: April 13, 1938 i
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f TECHNICAL SPECIFICATION AMENDMENT FOR THE V. C. SUMMER NUCLEAR STATION Docket No.150-395L NRC PDR Local PDR PD21 r/f S.Varga G. Lainas P. Anderson J. Hayes OGC-B D. Hagan E. Jordan J. Partlow T. Barnhart (4)
Wanda Jones E. Butcher R. Giardina ACRS (10)
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