ML20079G301
| ML20079G301 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 12/28/1983 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20079G285 | List: |
| References | |
| NUDOCS 8401200026 | |
| Download: ML20079G301 (2) | |
Text
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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION SUPPORTING AMENDMENT NO. 64 TO FACILITY LICENSE N0. DPR-fl AND' AMENDMENT N0. 89 TO FACILITY LICENSE N0. DPR-62 CAROLINA POWER & LIGHT COMPANY BRUNSWICK STEAM ELECTRIC PLANT, UNITS 1 AND 2 DOCKET NOS. 50-325 AND 50-324 1.0 Introduction Our concerns regarding the deficiencies in the existing design of reactor protection system (RPS) power monitoring in BWRs was transmitted to the Carolina Power & Light Company by NRC Generic Letter dated September 24, 1980.
In response to this, by letters dated December 10,1980 and January 29, 1982, the licensee proposed design modifications and changes to the Technical Sp'ecifications. A detailed review and Technical Evaluation of these proposed modifications was performed and the proposed modifications found acceptable in a staff Safety Evaluation dated August 3, 1982.
New Technical Specifications were proposed subsequently by letter dated May 24, 1982, which was superseded by letter dated August 16, 1982.
The amendments would add Limiting Conditions for Operation and surveillance requirements for the Reactor Protection System (RPS) electrical power supplies.
The change is intended to assure that the power produced by the RPS motor-generator sets is of a quality acceptable to the RPS.
2.0 Evaluation Technical Specification changes were proposed by the licensee based on the installation of General Electric (GE) designed protection assemblies, two in each of the three sources of power to the RPS (RPS M-G sets A and B and l
the one alternate source).
Each assembly includes a circuit breaker and a monitoring module consisting of an undervoltage, overvoltage and an under-l frequency sensing relay.
l The licensee proposed Limiting Condition for Operation (LCO) and Surveillance Requirements. The LC0 requires two operable power monitoring channels for each inservice RPS MG set or alternative power source. Corrective actions are specified for inoperable monitoring channels.
The surveillance require-ments require a channel functional test every six months and demonstrated operability, including trip set points for overvoltage, undervoltage and underfrequency conditions.
We have reviewed the licensee proposed Technical Specifications and conclude that the trip set points are acceptable.
We have also discussed the need for l
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time delays for the relays. The licensee reported a time delay tolerance of 0.133 seconds which is within the recommended value of < of 0.14 seconds.
- 3.0 Environmental Considerations We have determined 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 concluded that the amendments involve an action which is insignificant from the standpoint of environmental impact and, pursuant to 10 CFR 51.5(d)(4), that an environmental impact statement, or negative declaration and environmental impact appraisal need not be prepared in connection with the issuance of these amendments.
4.0 Conclusions 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 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.
i Date:
December 28, 1983
- Principal Contributors:
J. Carter I. Ahmed O
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