ML20206E888
| ML20206E888 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 04/10/1987 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20206E886 | List: |
| References | |
| NUDOCS 8704130775 | |
| Download: ML20206E888 (2) | |
Text
'o UNITED STATES 8"
NUCLEAR REGULATORY COMMISSION
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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION SUPPORTING AMENDMENT N0. 106 TO FACILITY OPERATING LICENSE N0. DPR-71 CAROLINA POWER & LIGHT' COMPANY BRUNSWICK STEAM ELECTRIC PLANT, UNIT 1 DOCKET NO. Sn-325
1.0 INTRODUCTION
By letter dated December 2,1986, Carolina Power & Light Company, the licensee for Brunswick Steam Electric Plant, Unit 1 (Brunswick 1) 4 requested changes to the Technical Specifications with regard to the Standby Liquid Control System (SLCS). The proposed changes reflect the licensee's plan to increase the minimum required concentration of sodium pentaborate in the SLCS tank to 13 weight percent. This increase in concentration in conjunction with the capability to operate both SLCS pumps simultaneously at a total combined flow greater than 66 gpm is proposed to satisfy, in part, the requirements of 10 CFR 50.62.
2.0 EVALUATION The changes proposed by the licensee have been reviewed by the staff against the requfrements of the ATWS rule (10 CFR 50.62), and Generic Letter 85-03 " Clarification of Equivalent Control Capacity for Standby Liquid Control Systems" dated January 28, 1985. The licensee's proposed increase in sodium pentaborate concentration to 13 weight percent in i
conjunction with a flow rate of 66 gpm and a reactor pressure vessel inside diameter of 218 inches, will provide a boron content equivalent in control capacity to 86 gpm of 13 weight percent sodium pentaborate for a 251 inch inside diameter vessel. This is in compliance with 10 CFR 50.62
. 1 and is therefore acceptable.
The licensee's plan to periodically test only one SLCS system pump at a time instead of both pumps simultaneously is also acceptable. This is based upon the licensee's statement that tests were performed on Brunswick 2 (an identical unit) during 1986 which verified that the SLCS is capable
]
i of operating under the increased pressures associated with two pump operation.
Furthermore, the test criterion of 41.2 gpm per pump for the positive displacement pumps provides reasonable assurance that 66 gpm will be achieved during two pump operation. The Technical Specification changes proposed by the licensee are therefore acceptable because they are consistent with the requirements of 10 CFR 50.62.
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3.0 ENVIRONMENTAL CONSIDERATION
S This amendment changes a requirement with respect to 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 amendment involves no significant increase in the amounts, and no significant change in the types, of any effluents that may be released offsite; and that there should be no significant increase in individual or cumulative occupational radiation exposure. The commission has previously issued a proposed finding that this amendment involves no significant hazards consideration and there has been no public comment on such finding. Accordingly, this amendment meets the eligibility criteria for categorical exclusion set forth in 10 CFR 651.22(c)(9). Pursuant to 10 CFR 551.22(b), no environ-mental impact statement or environmental assessment need be prepared in connection with the issuance of the amendment.
4.0 CONCLUSION
We have concluded, 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 re-gulations, and the issuance of the amendment will not be inimical to the comon defense and security or to the health and safety of the public.
Principal Contributor:
T. Collins Dated: April 10, 1987 n
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