ML20099E345
| ML20099E345 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 10/31/1984 |
| From: | NRC |
| To: | |
| Shared Package | |
| ML20099E336 | List: |
| References | |
| TAC-52159, TAC-52160, NUDOCS 8411210238 | |
| Download: ML20099E345 (2) | |
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na ter
- 4 UNITED STATES -
NUCLEAR REGULATORY COMMISSION c
.-a WASHINGTON, D. C. 20555 o.%
SAFETY EVALUATION REPORT
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RELATED TO AMENDMENT NO. 37 TO FACILITY OPERATING LICENSE NPF-9 AND TO AMENDMENT NO.18 TO FACILITY OPERATING LICENSE NPF-17 DUKE F0WER COMPANY INTRODUCTION i
In a letter dated August 2,1983, the Duke Power ' Company (licensee) reouested a number of amendments to Appendix A of Operating Licenses NPF-9 and NPF-17.
One proposed amendment would revise Technical Specification 3.5.1.2 to allow unit operation at less than or equal to 46% rated thermal power with.the Upper Head Injection-Accumulator System inoperable. The system perfoms no function during nomal operation but serves to mitigate accidents after they occur.
EVALUATION A limited spectrum of large and small breaks was analyzed.at 46% power with an F of 4.64. This F is pemissible in this power range. The 1981 mo' del was 3 sed for large breaks and the corrected 1975 model was used for small breaks. UHI support columns and guide tubes.were modeled as in previous UHI ECCS calculations. The cold leg accumulators were maintained at 400 psi to reflect that specification for UHI plants. We.have reviewed these elements of this calculation and conclude that this is an appropriate methodology for analyzing ECCS performance under chese condition!. The results of the analyses were within the perfomance limits of 10 CFR 50.L6.. We, therefore, conclude that LOCA analysis for this condition is acceptab'e. Analyses of other trans-ients and accidents is not necessary, since all othar transients and accidents would be bounded by previous analyses at zero power er full power.
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ENVIRONMENTAL CONSIDERATION We have determined that the amendments do not authorize a change in effluent types or total amounts nor an increase in power level and will not result in any significant environmental impact. Having made this determination, we have further concluded that the amendments involve an action which is insignificant from the standpoint of environmental impact and, pursuant to 10 CFR 951.5(d)(4),
that an environmental impact statement or negative declaration and environmental impact appraisal need not be prepared in connection with the issuance of these amendments.
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8411210238 841031 DR ADOCK 05000 l
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CONCLUSION Notice of opportunity for a prior hearing was published in the Federal Register on January 4, 1984 (49 FR 530).
No requests for a hearing were received.
We have concluded, based on the consideration discussed above, that:
(1) there reasonable 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 conducted in compliance with the Commission's regulations and the issuance of these amendments will not be inimical to the common defense and security or to the health and safety of the public.
Principal Contributors: Norman Lauben - Reactor Systems Branch, DSI R. Birkel, Licensing Branch No. 4, DL Dated: October 31, 1984 e,,e d
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