ML20039G303
| ML20039G303 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 12/23/1981 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20039G300 | List: |
| References | |
| TAC-47464, NUDOCS 8201180022 | |
| Download: ML20039G303 (2) | |
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UNITED STATES 5
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WASHINGTON, D. C. 20555 1.;...../
SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION SUPPORTING AMENDf1ENT N0.4d TO FACILITY OPERATING LICENSE NO. DPR-72 FLORIDA POWER CORPORATION, ET AL CRYSTAL RIVER UNIT NO. 3 NUCLEAR GENERATING PLANT DOCKET NO. 50-302 Introduction By application dated December 22, 1981, Florida Power Corporation, (FPC or the licensee) requested changes to the Technical Specifications (TSs) of Facility Operating License No. DPR-72 for operation of the Crystal River Unit No. 3 Nuclear Generating Plant (CR-3).
These changes would allow operation of CR-3 at less than 40% of full power during certain switching operations with the
-reactor coolant pump power monitor trip function bypassed.
Discussion,and Evaluation The pump power ronitors are devices that monitor the electrical power to each of the four reactor coolant pumps at CR-3.
These monitors trip the reactor on a loss of power or a draw of too much power from two or more reactor coolant pumps. Therefore, the system determines a loss or a reduction of the reactor coolant flow by monitoring the reactor coolant pump power and detecting an inoperable pump by abnonnal power conditions.
The pump power monitors were installed to allow CR-3 reactor power to be increased from 2452 Ikt to 2544.
The NRC authorized this power increase on July 21,1981. The pump power monitors had not been required for the lower, 2452 fWt, reactor power level because the response of other reactor protec-tion systems was fast enough to detect pump failure at that power leval.
FPC has recently experienced reactor trips from the pump power monitor system when starting reactor coolant pumps and when switching electrical power from the CR-3 auxiliary transformers to the startup transformer. Therefore, FPC proposes to manually bypass the pump power monitor trip during switchover between startup and auxiliary transformers and during energizing or de-energizing of a reactor coolant pump if reactor power-level is below 40% of full power.
We have determined that operation at 40% or less reactor power with the pump power trip bypassed during the above switching operations is acceptable because:
- 1) the pump power trip is primarily needed at or near full power operations to compensate for slower reaction times of other reactor protec-tion systems, 2) the time intervals in which the pump power monitor trip will be bypassed, during switching operations, is very short relative to operating time in which the system is active, 3) the pump power monitor trip is backed up by the flux-flow trip and a high pressure trip for a loss of two or more reactor coolant pumps.
8201180022 811223 DR ADOCK 05000302 p
CR-3 Environmental Consideration We have determined that the amendment does 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 amendment involves an action which is insionificant from the standpoint of environmental impact and, pursuant to 10 CFR 551.5(d)(4), that an environmental impact statement, or neoative declaration and environ-mental impact appraisal need not be prepared in connection with the issuance of this amendment.
Conclusion 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 amendment will not be inimical to the common defense and security or to the health and safety of the public.
Dated:
December 23, 1981 l
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