ML19312E791
| ML19312E791 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 05/19/1980 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML19312E786 | List: |
| References | |
| NUDOCS 8006090534 | |
| Download: ML19312E791 (2) | |
Text
.
O
%o, UNITED STATES
[
g,..3 3 g NUCLEAR REGULATORY COMMISSION b-WASHING TO N, D. C. 20555
%.' Wp."/
,4 g
SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION SUPPORTING AMENDMENT NO.18 TO LICENSE NO. NPF-4 VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION, UNIT NO. 1 DOCKET NO. 50-338 Introduction By letter dated January 8,1980, the Virginia Electric and Power Company (the licensee) requested an amendment to Operating License No. NPF-4 for the North Anna Nuclear Pcwer Station, Unit No.1 (NA-1). The licensee's proposed amencment would correct an administrative error presently l
specified in the NA-1 Technical Specifications.
Discussion and Evaluation The licensee's propt ad change would correct an administrative error on page 3/4 3-29a, item 13.b of the NA-1 Technical Specifications.
Item 13.b specifies the maximum time delay (response time) expected from the onset of a detected degraded offsite power system unt11 the emergency diesel generator is supplying power to the emergency buses.
The presently specified response time of 64 seconds or less does not include the 10 seconds or less required for the diesel generator to start and come up to rated frequency and voltage. The 10 seconds or less should be added to the 64 seconds or less to provide the correct maximum response time.
Based on the safety analysis performed by the licensee and reviewed by the NRC which specified a diesel response time of 10 seconds or less, we find the licensee's proposed correction to be acceptable. Therefore, item 13.b, page 3/4 3-29a of the NA-1 Technical 5;ecifications is hereby specified to be 74 seconds or less.
l 8006090534 f
e 2-Environmentcl Consideration We have determined that the amendment does nct 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 impact and, pursuant to 10 CFR 51.5(d)(4), that an environmental impact appraisal need not be prepared in connection with the issuance of this amendment.
1 Conclusion I
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 amendment 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 Commission's regulations and the issuance of this amend-ment will not be inimical to the common defense and security or to the health and safety of the public.
Dated: May 19, 1980 3
't
--