ML15112A979
| ML15112A979 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 12/10/1980 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML15112A978 | List: |
| References | |
| NUDOCS 8101090195 | |
| Download: ML15112A979 (2) | |
Text
pR REGj~
o1 UNITED STATES 0
NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION SUPPORTING AMENDMENT NO. 89 TO FACILITY OPERATING LICENSE NO. DPR-38 AMENDMENT NO. 89 TO FACILITY OPERATING LICENSE NO. DPR-47 AMENDMENT NO. 86 TO FACILITY OPERATING LICENSE NO. DPR-55 DUKE POWER COMPANY OCONEE NUCLEAR STATION, UNITS NOS. 1, 2 AND 3 DOCKETS NOS. 50-269, 50-270 AND 50-287 Introduction By letters dated June 24 and October 14, 1980, the Duke Power Company (the licensee or DPC) submitted proposed changes to the Station's common Technical Specifications (TSs) that redefine the term Operable and add a general Limiting Condition for Operation (LCO).
Background
By letter dated April 10, 1980, the NRC requested all power reactor licensees to submit proposed TSs related to preserving the single failure criterion for systems that are relied upon in the licensees' Final Safety Analysis Report (FSAR). By and large, the single failure criterion is preserved in the TSs by properly defining the term OPERABLE and by specifying LCOs that require all redundant components of safety related systems to be OPERABLE. Our April 10 letter transmitted Model TSs for use by the licensees.
Evaluation The NRC Model TSs consisted of three sections: (1) a definition of Operable, (2) an LCO providing an Action Statement for circumstances in excess of those addressed in an existing Station TS, and (3) an LCO concerning unavailability of emergency power or normal power. DPC combined the definition of Operable with the LCO concerning power availability. The combination was carried out in an acceptable manner.
The NRC staff requested the licensee to revise the definition of Operable to implicitly state that a system is capable of performing its specified function when all necessary instrumentation, controls, normal and emergency electrical power sources, cooling or seal water, lubrication or other auxiliary equipment that are required for the system to perform its function are also capable of performing their related support function. We have reviewed the licensee's 81019
-2 definition and have determined that it is consistent with our request and is therefore acceptable.
DPC also proposed an additional TS 3.0-Limiting Condition for Operation, for the Oconee Station. This proposed TS is an almost verbatim use of our Model TS, described as (2) above. The Model was written for a single unit station; the licensee modified it for a multi-unit station.
We conclude that the redefinition of OPERABLE and the addition of LCOs, des cribed above, will aid in preserving the safety related systems single failure criterion and are thus acceptable.
Environmentel Consideration We have detprmined 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 conclqded that the amendments jnvolve an action which is insignificant from the st4pdpoint of environmental ippact and, pursuantto 10 CER 151.5(d) (4),
that an environmnental impact statement, or negative declaration and environ mental impact apprai sal need not be prepared in connection with the issuance of these amendments.
Conclusion We have concluded, based on the considerations discussed above, that: (1) because the 4mendments do not involve a significant increase in the probability or consequepces of accidents previously considered and do not involve a signi ficant decrease in a safety margin, the amendments do not involve a significant hazards copsideration, (2) there is reasonable assurance that the health and safety of 14e public will not be endangered by operation in the proposed manner, and (3) suph activities will be conducted in compliance with the Commission's regulations and the issuance of these amendments will not be inimical to the common defgpso andt security or to the health and safety of the public.
Dated: December 10, 1980