ML19209A133
| ML19209A133 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 09/08/1979 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML19209A131 | List: |
| References | |
| NUDOCS 7910020607 | |
| Download: ML19209A133 (2) | |
Text
.
, gR AICg gi UNITED STATES y ;. 4,( [g NUCLEAR REGULATORY COMMISSION
'; *\\ " /. E WASHINGTON. D. C. 20555
'S e SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION SUPPORTING AMEND"ENT NO.18 TO FACILITY OiERATING LICENSE NO. DPR-70 PUBLIC SERVICE ELECTRIC AND GAS COMPANY, PHILADELPHI A ELECTRIC COMPANY,
DELf'ARVA POWER AND LIGHT COMPANY, AND ATLAt! TIC CITY ELECTRIC COMPANY SALEM NUCLEAR GENERATING STATION, UNIT NO. 1 DOCKET NO. 50-272 Introduction By letter of June 14, 1979, Public Service Electric and Gas Company (the licensee) requested anendment of Facility Operating License No. DPR-70 for the Salen Station Unit No.1.
The proposed amendnent would revise the surveillance requirenents for verification of diesel generator trips (4.8.1.1.2) naking then identical to such requirenents as have been accepted by the NRC for the Unit 2 Technical Specifications.
Branch Technical Position 17 has the objective of preventing non-vital trips while the diesel generators are operating under accident conditions.
To neet this objective all but the nost vital trips should be bypassed during energency startup of the diesels. Such action raises the nargin of plant safety by increasing the availability of the diesel generators for accident conditions.
During the licensing review of Unit No. 2 the licensee has proposed to renove the generator breaker failure protection trip and add the 4 Kv bus differential trip to the list of diesel general trips that are not bypassed upon loss of voltage on the energency bus safety injection actuation signal. During the NRC's review of Unit No. 2, renoval of the generator breaker failure protection trip was found to be required to prevent possible major damage to the diesel generator that could disable it when required.
Evaluation The safety review that was perforned by the NRC for the Unit No. 2 Technical Specifications is directly applicable and acceptable for Unit No.1, since the diesel generators are essentially identical.
1136 172 f
7 910020 60 [
2-The safety margin of the Unit No. I diesel generator will not be compromised by this proposed Technical Specification change because the most vital protection will not be bypassed but will remain available under emergency operating conditions. We, therefore, find the requested revisions to be acceptable.
Environnental Consideration We have deternined that the amendment does 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 amendment involves an action which is insignificant from the standpoint of environmental inpact and, pursuant to 10 CFR SI.5(d)(4), that an environmental impact statement or negative declaration and environ-mental 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 involve a significant increase in the probability or consequences of accidents previously considered and does not involve a significant decrease in a safety margin, the amandment does not involve a significant hazards consideration, (2) there is reasonable assurance that the health and safety of the public will not be endangered by operation in the proposed manner, and (3) such activities will be conducted in compliance with the Conmission's regulations and the issuance of this amendment will not be inimical to the conmon defense and security or to the health and safety of the ptr.,lic.
Date:
September 8,1979 1136 173