ML20197B767
| ML20197B767 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 03/06/1998 |
| From: | NRC (Affiliation Not Assigned) |
| To: | |
| Shared Package | |
| ML20197B764 | List: |
| References | |
| NUDOCS 9803120009 | |
| Download: ML20197B767 (2) | |
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i NUCLEAR REGULATORY COMMISSION WASHINGTON, 0.4. 30M6 4001 SAFETY EVALUATION BV THE OFFICE OFJQQl EAR REACTOR REGULATION RELATED TO AMENDMENT NO.154TO FACjl,[Dr QLUt/ fjNG LICENSE NO. DPR 28 VERMONT YANKEE NUCLEAR POWER CORPORATION i
VERMONT YANKEE NUCLEAR POWER STATION QQQKET NO. 50 271
1.0 INTRODUCTION
By letter dated August 22,1997, as supplemented by letters dated September 18,1997, October 31,1997, the Vem1ont Yankee Nuclear Power Corporation (the licensee) submitted a request to amend the Vermont Yankee Nuclear Powar Station Technical Specifications (TSs).
The proposed amendment would revise the TSs to address the new low pressure CO, fire suppression system for the East and West Switchgear Rooms and to more clearly describe the separation of the rooms into two separate fire areas. The October 31,1997, submittal did not effect the original no significant hr.ards consideration.
2.0 EVALUATION The proposed amendment provides for the use of a newly installed low pressure CO, fire suppression system for the East and West Switchgear Rooms. The new low pressure CO, system consists of a 6 ton steige tank, piping, valves, and associated instrumentation and controls. The proposed amendment would revise the Jpplicable TSs limiting conditions for operation (LCO) and surveillance requirements to incorporate requirements appropriate for the new low pressure CO, system and remove requirements associated with the existing high pressure CO, system. The proposed values for minimum Co, storage tank level and pressure are based upon system design to achieve and maintain the design CO concentration in either 2
switchgear room. The low pressure fire suppression system will ensure that the affected switchgear room's fire suppression is sufficient to stop the spread of a fire in either the East or West Switchgear Room, as well as providing assurance that the safety related equipment in the unaffseted rooms will remain functional to accompi;sh, if required, their intended safety functions.
The new system will meet the CO concentration requirements of National Fire Protection 2
Association (NFPA) 12, " Carbon Dioxide Extinpulshire Systems," following detection of a fire condition in one of the associated rooms.
The proposed amendment would also more clearly designate the East and West Switchgear Rooms as two separate fire areas. The two rooms are each provided with fire detection and suppression systems and are separated by a 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> fire barrier. The divistors of the switchgear room into two fire areas was accomplished by a 1982 plant design change. However, the TSs were not revised at that time to clearly indicate the division.
Based on its review, the NRC staff finds that the proposed amendment makes appropriate changes to reflect the installation of the low pressure CO, fire suppression system and reflect the East and West Switchgear Rooms as two separate fire areas, will have no adverse impact on safety and does not pose an undue risk to public health and safety. Therefore,it is acceptable.
9803120009 980306 PDR eDOCK 05000271 P
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3.0 STATE CONSULTATION
I In accordance with the Commission's regulations, the Vermont State official was notified of the proposed issuance of the amendment. The State offleial had no comments.
4.0 ENVIRONMENTAL CONSIDERATION
The amendment changes a requirement witn respect to installation or use of a facility component located within the restricted area as defined in 10 CFR Part 20 and changes surveillance j
requirements. The NRC staff has determined that the amendment involves no signifrant increase in amounts, and no significant change in the types of any efflueMs that may be released 4
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offsite, and that there is no significant increase in individual or cumulative occupational radiation j
exposure. The Commisolon has previously issued a proposed finding that the amendment i
i involves no significant hazards consideration, and there has been no public comment on such finding (62 FR 525g0). Accordingly, the amendment meets the eligibility critoria for categorical exclusion set forth in 10 CFR 51.22(c)(g). Pursuant to 10 CFR 51.22(b), no environmental impact statement or envimnmental assessment need be prepared in connection with the issuance of the amendment, y
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 in the health and safety of the public, s
Principal Contributor. Kahten N. Jabbour Date: March 6.1998 t
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