ML20004C320
| ML20004C320 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 05/26/1981 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20004C319 | List: |
| References | |
| TAC-43822, TAC-43823, NUDOCS 8106030063 | |
| Download: ML20004C320 (2) | |
Text
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= NUCLEAR REGULATORY COMMISSION E
WASHINGTON, D. C. 20555
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SAFETY EVALUATION BY -THE OFFICE OF NUCLEAR REACTOR REGULATION SUPPORTING AMENDMENT NO. 85 TO FACILITY ~ 0PERATING LICENSE NO. DPR-57
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GEORGIA POWER COMPANY OGLETHORPE POWER CORPORATION MUNICIPAL ELECTRIC AUTH0 PITY-0F GEORGIA, CITY OF DALTON, GEORGIA
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EDWIN I.' HATCH NUCLEAR PLANT, UNIT NO.1 DOCKET NO. 50-321 Introduction By letter dated May 4,1981, Georgia Power Company (licensee) requested changes to the Technical Specifications (TSs) appended to Facility Operating License No. DPR-57 for the Edwin I. Hatch Nuclear Plant, Unit No. 1.
The changes involve adding two valves and two flanges to the list of containment isolation valves and dalating surveillance requirements for the Safety Relief Valve tail pipe pressure switches.
The licensee, in the May 4 letter, proposed as ea alternate to deletion of the Safety Relief Valve tail pipe pressure s.. ;ck surveillance program, should it not be acceptable, that we should evaluate a change in setpoint for these switches. After discussions between our staffs, we mutually agreed that NRC should evaluate the setpoint change. This is the ' evaluation we have prepared, as given below, of the second proposed change.
Evaluation The licensee, during the current refueling outage of Hatch Unit 1, is adding a Torus Drainage and Purification System. A component of the system penetrates the torus shell, a part of the containment boundary, thus requiring redundant isolation capability per 10 CFR 50, Appendix A, General Design Criterion (GDC) 56. We have reviewed the licensee's submittal and the proposed TS change and conclude the added valves and flanges comply with GDC 56 and are thus acceptable.
l The second proposed change results as a consequence of upgrading the l
pressure switches in the tail pipes on the discharge side of the Pressure l
Relief Valves. The new switches are being installed during the current outage and are designed per the environmi. ital qualification requireme-ts of electrical equipment of IE Bulletin
- 3-01B, the NRC Criterion for such components. The previous switches were not qualified. The new f
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4 switches have a pressure 'setpointzof 30 + 5 psig and. require a TS change 1as the:old switches ~had a setpoint different fran:the-new switches. We.
conclude that the change in setpoint it. acceptable' as it permits use of.
switches qualified for.the~ fntended service.
' Environmental Consideratic;s We have ' determined that the amendment does not ' authorize a change in.
effluent types or total, amounts-nor an increase.in power'-level:and
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will not resultiin any significant environmental -impact. Having made'
.this ' determination, we have further concluded that 'the amendment. involves an action which is insignificant from the standpoint of environmental-
- impact and, pursuant to 10 CFR 551.5(d)(4),1thatLan environmental impact-statement, or1 negative-declaration and environmental impact appraisal need not be' prepared ;in connection with the issuance of this amendment. -
Conclusion
- We have concluded.. based on the' considerations discussed above,-_that':
(1) because the amendment does not :iavolve a significant increase in the probability or conse' uences of accidents previously. considered -
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q and does not involve a :significant decrease in a safety margin, the Jamendment does not involve'a signifir. ant hazards consideration, (2):
there-is reasonable assurance that the. health-and safety. of. the public will'not be endangered by operatten-in the proposed manner, and (3)
.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.
Dated: lby 26, 1981 t
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