ML20217M457
| ML20217M457 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 03/31/1998 |
| From: | NRC (Affiliation Not Assigned) |
| To: | |
| Shared Package | |
| ML20217M442 | List: |
| References | |
| NUDOCS 9804080106 | |
| Download: ML20217M457 (2) | |
Text
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UNITED STATES j
NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20046-4001
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. BAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATIOli RFI ATED TO AMENDMENT NO.156 TO FACILITY OPERATING LICENSE NO. DPR-28 VERMONT YANKEE NUCLEAR POWER CORPORATION VERMONT YANKEE NUCLEAR POWER STATION DOCKET NO. 50-271
1.0 INTRODUCTION
By letter dated October 11,1996, the Vermont Yankee Nuclear Power Corporation (the licensee) submitted a request to amend the Vermont Yankee Nuclear Power Station Technical Specifications (TSs). The proposed amendment would revise TS Sections 3.13.G.1 and 3.13.G.2 regarding the amount of foam concentrate required to support the operability of the reactor recirculation motor generator (MG) set foam fire suppression system. In both instances, the required amount of foam concentrate is increased from 100 gallons to 150 gallons.
2.0 E/ALUAIlRN in License Event Report 96-13, dated May 23,1996, the licensee reported, in part, that the reactor recirculation MG set foam fire suppression system area of coverage per foam nozzle was found to exceed the manufacturer's recommended coverage. The system was administrative!y declared inoperable and compensatory measures were put in place. The licensee's stated corrective action was to modify the system as necessary to bring it to its required design configuration. To that end, a design change was prepared to replace the existing equipment with a system capable of satisfying National Fire Protection Association (NFPA) discharge density requirements, thereby restoring the system to its originally approved design configuration. As part of this new system, a 1501allon foam concentrate tank will be installed to provide the capacity required to meet NFPA Standards. The intent of the current TSs regarding foam concentrate Inventory is to keep the existing tank full and to keep a 100% refill capacity on site at all times. The proposed amendment will ensure that this intent continues to be met.
. The proposed amendment will only modify the TSs to reflect the actual inventory of foam concentrate required to support the operability of the reactor recirculation MG set foam fire suppression system. The method of system operation and initiation remain unchanged from the originally approved design. The increase in inventory is required to ensure that NFPA Code requirements for this system are met. The new system design has been evaluated to assure that the enhanced spray pattom and increased volume of spray does not impact any equipment not prevbusly evaluated and does not create any threat of flooding to equipment.
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Based on its review, the NRC staff finds that the proposed amendment will have no adverse.
Impact on safety and does not pose an undue risk to public health and safety. In addition, the proposed change is required to assure that NFPA Code requirements for this system are met.
Therefore, it is acceptable.
3.0 STATE CONSULTATION
in accordance with the Commission's regulations, the Vermont State official was notified of the proposed issuance of the amendment. The State official had no comments.
4.0. ENVIRONMENTAL CONSIDERATION
- The amendment changes a requirement with respect to installation or use of a facility component located within the restricted area as defined in 10 CFR Part 20. The NRC 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 the amendment involves no significant hazards consideration, and there has been no public comment on such finding (62 FR 54877) Accordingly, the 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 environmental assessment need be prepared in connection with the issuance of the amendment.
5.0 CONCLUSION
The Commission has concluded, based on the considerations discussed above, that: (1) there is reasonable assurance that the health and safety of the public will not be endangered by operation in the proposed manner, (2) such activities will be conducted in compliance with the Commission's regulations, and (3) the issuance of the amendment will not be inimical to the common defense and security or to the health and safety of the public.
Principal Contributor. Kahtan N. Jabbour Date: March 31, 1998 I
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