ML19350C127
| ML19350C127 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 03/18/1981 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML19350C125 | List: |
| References | |
| NUDOCS 8103300557 | |
| Download: ML19350C127 (2) | |
Text
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%*o UNITED STATES
- 3.. )Z - k NUCLEAR REGULATORY COMMISSION 3
.g MSHINGTON, D. C. 20555 SAFETY EVALUATION BY THE OFFIC OF NUCLEAR REACTOR REGULATION RELATED TO AMENDMENT N0. 24 AND NO. 5 TO FACILITY OPERATING LICENSE NOS. NPF-4 AND NPF-7 VIRGIRIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION, UNITS NO. 1 AND NO.
DOCKET NO. 50-338 AND 50-339
==
Introduction:==
By letter dated February 9,1981, the Virginia Electric and Power Company (the licensee) requested a charige to the Technical Specifications for Facility Operating Licenses NPF-4 and HPF-7 for the North Anna Power Station, l_Inits No.1 and No. 2 (NA-l&2), respectively.
The licensee is implementing a charging pump cross-connect modification in response to commitments made to the NRC regarding Appendix A to Branch Technical Position 9.5.1 and the Fire Protection Safety Evaluation Report for the NA Power Station dated February,1979.
Discussion:
The purpose of the charging pump cross-connect modification is to provide alternate shutdown capability in the event a fire disables the charging pumps of one unit by utilizing a charging pump from the opposite unit.
The charging pump cross-connect will consist of two normally locked closed manual valves installed between the HA-1 charging pump discharge header and the.JA-2 charging pump discharge header. Operation of the charging pump cross-connect will be strictly manual and will be local to the headers in the Auxiliary Building.
The proposed Technical Specification change would require at least one charging pump to be operable when a given unit is in Modes 5 and 6 (Cold Shutdown aed Refueling).
And the change would add an ACTION statement requiring the restoration of one charging pump to operable status when the other unit is in Modes 1, 2, 3 and 4 (Power Operation, Startup, Hot Standby, and Hot Shutdown). The Action statement would assure the availability of one charging pump for use with the charging pump cross-connect when the non-affected unit is shutdown.
. Evaluation:
We have considered the cross-connect feature, its use, and potential malfunctions, and have concluded that the charging pump cross-connect will not adversely impact the criteria to which we originally reviewed NA-182. Thcrefore, we find the charging pump cross-connect feature and th'e above requested Technical Specification governing it to be acceptable.
Environmental Consideration We have determined that the amendments do not authorize a change in effluent types or total amounts _nor an increase in power level and
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will not result in any significant environmental impact. Having made this determination, we have further concluded that the amendments involve an action which is insignificant from the standpoint of environmental impact and, pursuant to 10 CFR 551.5(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 these amendments.
Conclusion We have concluded, based on the considerations discussed above, that:
(1) because the amendments do not involve a significant increase in the probability or consequences of accidents previously considered and do not involve a significant decrease in a safety margin, the
.anendments do 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 irsuance of these amendments will not be inimical to the common. defense and security or to the health and safety of the public.
Date:
March 18, 1981