ML19317E177
| ML19317E177 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 11/03/1977 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML19308B196 | List: |
| References | |
| NUDOCS 7912160056 | |
| Download: ML19317E177 (6) | |
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UNM ED STATES NUCLEAR REGULATORY COMMISSION C) {3 * -
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SAFETY EVQ._UATION BY T!iE OFFICE OF NUCLEAR REACTOR REGULATION SUPPORTING ARENDMENT NO. 50 TO FACILITY LICENSE NO. DPR-38 AMENDMENT NO. 50 TO FACILITY LICENSE NO. DPR 47 AMENDMENT NO. 47 TO FACILITY LICENSE NO. DPR-55 DUKE POWER COMPANY OCONEE NUCLEAR STATION, UNIT NOS. 1, 2 AND 3 DOCKET N05. 50-269, 50-270 AND 50-287 Introduction By letter dated October 13, 1976, as supplemented September 29, 1977, the Duke Povse Conpany (licensee) requested changes to the common Technical Specifications incorporated ir, the operating licenses of Units 1, 2 and 3 of the Oconee Nuclear Station.
Discussion The offsite power system for Oconee Nuclear Power Station, Units 1, 2 and 3 consists of six 230 kV transmission lines to the 230 kV station switch-yard and two 500 kV transmission lines to a 500 kV switchyard. Onsite power is provided by two 87.5 MVA hydroelectric generators available either through the 230 kV swit:hyard and the 45/60 MVA startup transfon ers or through a 13.3 kV underground feeder which utilizes its cwn 12/16/20 MVA transformer and supplies the 4160 V safety-related buses of the three un i ts.
In addition, one of the gas turbines located 30 miles away at the Lee Steam Station via an independent overhead 100 kV transmission system is available as standby to the onsite power system.
The use of the onsite Keowee Station with its two hydroelectric. generating units is under the direct control of the Oconee Nuclear Power Station and was originally reviewed and found acceptable as the onsite source of power for the Oconee Station.
During this evaluation, we considered the Lee Staticn's gas turbines and the dedicated 100 kV transmission circuit as a temorary substitute power source for use primarily during a period when the onsite hydro units are not available.
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UtlITED STATES tiUCLEAR REGULATORY COMMISSI0t1 DOCKET fl05. 50-269, 50-273 AtlD 50-287, DUKE POLER COMPAtJY fiOTICE OF ISSUAtlCE OF AMEllDMEi!TS TO FACILITY OPiliATI:iG LICEtiSES The U.S. !iuclear Regulatory Commission (the Commission) has issued Amendment l10s. 50, 50 and 47 to Facility Operating License Nos. DPR-38 DPR-47 and DPR-55, respectively, issued to Duke Power Company which I
l revised the Technical Specifications for operation of the Oconee fluclear Station, Unit flos.1, 2 and 3, locatad in Oconee County, South Carolin3.
The amendments are effective within 30 days after the date of issuance.
These amendments revise the Technical Specifications to allow operation of the Ocnnee lluclear Station, (1) with one Keowee hydro unit out of service for periods not to exceed 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or operation with the underground feeder out of service for perinds no* to exceed 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, (2) with one Kecwee hydro unit out of servi;e from 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> up to a maxirran of 45 days when the remaining Keowee unit and both the overhead and underground transmission circuits are operable and the standby buses are energized by one of the two Lee gas turbines, and (3) with both Keowee hydro units out of service for 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> for planned reasons or 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> for unplanned reasons.
Revisions are also made to surveillance requirerrents of the Emergency Power System.
The applicition for the amcndments complies with the standards 1954, as amended (the f,ct),
l DUPLICATE DOCUMENT The Conaission has taade 1
Entire document PI usly entered into system under:
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