ML20043H658
| ML20043H658 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 06/12/1990 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20043H656 | List: |
| References | |
| NUDOCS 9006260254 | |
| Download: ML20043H658 (2) | |
Text
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k UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20666
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SAFETY EVALUATION.BY THE.0FFICE.0F NUCLEAR. REACTOR. REGULATION RELATED.T0. ANENDNENT N_0_.
145 T0. FACILITY OPERATING LICEWSE.NO. 0PR.65 NORTHEASTNUCLEAR. ENERGY. COMPANY.ETAh MILLSTONE.WUCLEAR. POWER.5TATIOW. UNIT. NO. 2 i
DOCKET.N0._S0-336 3
1.0 INTRODUCTION
r Dy application for license amendment dated March 21, 1990, Northeast Nuclear Energy Company (the licensee) requested changes to the Technical Specifications (TS) for Millstone Nuclear Power Station, Unit 2.
The proposed change would add a new requirement on the ultimate heat sink for the reactor and containment cooling system by specifying an average water temperature of less than or equal to 75 degrees F at the intake structure except when Millstone 2 is in cold shutdown or in the refueling condition.
2.0 EVALUATION The ultimate heat sink (Long Island Sound) provides the cooling water necessary to ensure the cooling capacity to provide for the removal of the normal heat loads and normal cooldown. loads and to mitigate the effects of accidents within acceptable limits. By placing a limit on the maximum temperature of the ultimate heat sink for plant operation, the licensee will assure that sufficient heat removal capacity is available. The intake structure draws water from the ultimate heat sink for circulation by the service water system. The service water system provides cooling for the Reactor Building Component Cooling Water (RBCCW)Systemheatexchangers. The Final Safety Analysis Report states that the RBCCW system heat exchangers are cooled by service water up to a maximum temperature of 75 degrees F.
Therefore, by adding this new requirement to the TS the licensee will ensure that the design basis for the ultimate heat sink is not violated. The staff finds the proposed change, an additional restriction not presently in the TS, to be acceptable.
3.0 ENVIRONNENTAL. CONSIDERATION This amendment changes a requirement with respect to the installation or use~of a facility component located within the restricted area as definN in 10 CFR Part 20 and changes surveillance requirements. We have determined t'at the amerdment n
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 in:rease in individual or cumulative occupational radiation exposure.
the staff has previously published a proposed finding that the amendment involves e^.06260254 90061-2 PDR ADOCK 05000336 P
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no significant hazards consideration and there has been no public comnent on such finding. Accordingly the amendment meets the eligibility criteria for categoricciexclusionsetforthin10CFR51.22(c)(9). Pursuant to 10 CFR 51.22(b), no anvironmental impact statement or environmental assessment need be prepared in connect 4nn with the issuance of the amendment.
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4.0 CONCLUSION
I We have concluded, based on the considerations discussed above, that (1) there is reasor.able assurance that the health and safety of the public will not be endangered by operation in the proposed manner, and (2) such activities will be ccnductedincompliancewiththeCommission'sregulations,and(3)theissuance of the amendrent will not be inimical to the common defense and security or the health and safety of the public.
Dated:
June 12, 1990 Principal Contributor:
G. Vissing J
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