ML20248E057
| ML20248E057 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 08/02/1989 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20248E054 | List: |
| References | |
| NUDOCS 8908110223 | |
| Download: ML20248E057 (2) | |
Text
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[p3 REGg*o, UNITED STATES l'
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NUCLEAR REGULATORY COMMISSION f
y WASMNGTON, D. C. 20555
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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMENDMENT NOS.121 AND 105 TO l
FACILITY OPERATING LICENSE NOS. NPF-4 AND NPF-7 VIRGINI A ELECTRIC AND POWER COMPANY OLD DOMINION ELECTRIC COOPERATIVE
- 0RTH ANNA POWER STATION, UNITS NO.1 AND NO. 2 j
DOCKET NOS. 50-338 AND 50-339 INTRODUCTION Ey letter dated June 8,1989, the Virginia Electric and Power Company (the licensee) requested changes to the Technical Specifications (TS) for the North Anna Power Station, Units No,'1 and No. 2 (NA-1&2). One proposed change would modify TS 3.3.3.5, Table 3.3-9, which addresses the Auxiliary Shutdown Panel Monitoring Instrumentation. The measurement range of the charging flow instru-mentation would be changed from "0-150 gpm" to "0-180 gpm," and the format of Tables 3.3-9 and 4.3-6 would be changed from horizontal to vertical.
DISCUSSION During the performance of the Control Room Design Review (CRDR) for NA-1&2, various indicators were ciNd as requiring modification, including charging flow. The CRDR identified that the existing square root scale of the charging flow instrumentation would make it dif ficel+ to read f1rv accurately and that the range of 0-150 gpm was too narrow. To relieve these problems, the charging flow instrumentation would be changed to a linear output indication and the range expanded to 0-180 gpm.
Expanding the display range and p.tviding the indication in a linear scale would allow the operator to more accurr.tely determine the charging flow rate during high or low flow rate conditions without decreasing accuracy during middle-of-scale operations. This would provir.e for a more accurate determination of the charging flow rate during abnormal as well as normal plant conditions.
TS 3.3.3.5, Table 3.3-9,. identifies the instrumentation and ranges required in the auxiliary shutdown panel. The charging flow is presently specified as 0-150 Spm and would be changed to 0-180 gpm as required by the CRDR finding.
EVALUATION Based on the above, the change will allow for more accurate determination of the charging flow rate during abnormal as well as normal plant ccnditions and will enhance safety. The requirements of Specification 3.3.3.5 are not changed nor are the Surveillance Requirements of 4.3.3.5.
Only the " Measurement Range" of Table 3.3-9 is affected. Based on the above, the staff finds the proposed change to be acceptable.
8908110223 890802 PDR ADOCK 05000338 P
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^ --The licensee's proposed change to Tables 3.3-9 and 4.3-6 from a horizontal 3
format to a vertd cal format is administrative in nature and is therefore acceptable.
ENVIRONMEf'.il CONSIDERATION l
These amendments involve a chhnge in the installation or use of a facility component located within the restricted area as defined in 10 CFR Part 20.
The staff has determined that the amendments involve no significant increase in the amounts, and no significant change in the types, of any effluents that may be released offsite, and that there is no significant increase in individual or cumulative occupational radiation exposure. The Commission has previously published a proposed finding that the amendments involve no significant hazards consideration and there has been no public comment on such finding. Accordingly, the amendments meet the eligibility criteria for categorical exclusion set forth in10CFRE51.22(c)(9).
Pursuant to 10 CFR 651.22(b), no environmental impact statement or environmental assessment need be prepared in connection with the issuance of the amendments.
CONCLUSION We have concluoed, based on the considerations discussed above, that (1) there is reasonable assurance that the health and safety of the public will not be endangered by operation in the proposed manner, and (2) such activities will be conducted in compliance with the Commission's regulations, and the issuance of the amendments will not be inimical to the common defense and security or to the health and safety of the public.
Date:
August 2, 1989 Principal Contributor:
Leon B. Engle
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