ML20080J733
| ML20080J733 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 02/16/1995 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20080J727 | List: |
| References | |
| NUDOCS 9502280075 | |
| Download: ML20080J733 (2) | |
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NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20066 4 001 x.....j SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMENDMENT NO.158 TO FACILITY OPERATING LICENSE NO. DPR-35 BOSTON EDISON COMPANY l
PILGRIM NUCLEAR POWER STATION DOCKET N0. 50-293
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1.0 INTRODUCTION
-By letter dated September 6, 1994, the Boston Edison Company (the licensee) submitted a request for changes to the Pilgrim Nuclear Power Station Technical Specifications (TSs).
The requested changes would relocate the alarms for the drywell to suppression chamber vacuum breakers to a different annunciator panel.
2.0 EVALUATION The purpose of the vacuum relief valves is to equalize the pressure between the drywell and suppression chamber and reactor building so that the structural integrity of the containment is maintained. The vacuum relief system from the pressure suppression chamber to reactor building consists of two 100 percent vacuum relief breakers. Operation of either system will maintain the pressure differential less than 2 psig; the external design pressure.
Each drywell suppression chamber vacuum breaker is equipped with three i
switches. One switch provides full open indication only. Another switch provides closed indication and an alarm.
The third switch provides a redundant alarm.
The licensee is requesting an amendment change to relocate the alarms for the drywell to suppression chamber vacuum breaker to a different annunciator panel.
The proposed change relocates annunciators in the room but does not change their design. function or setpoint.
The annunciator system is nonsafety related and therefore performs no direct safety function.
The NRC staff finds this amendment change acceptable.
This change is administrative in nature. The modification does not modify the setpoints or functions of the annunciators.
The equipment being relocated-is nonsafety related and its relocation does not impact the margin of safety.
3.0 STATE CONSULTATION
In accordance with the Commission's regulations, the Massachusetts State-Official was notified of the proposed issuance of the amendment.
The State official had no comments.
9502280075 950216 DR ADOCK 05000293 PDR
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4.0 ENVIRONMENTAL CONSIDERATION
The 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 NRC 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 is no significant increase in individual or cumulative occupational radiation exposure.
The Commission has previously issued a proposed finding that the amendment involves no significant hazards consideration, and there has been'no public comment on such finding (59 FR 53839). Accordingly, the amendment meets the eligibility criteria for categorical exclusion set forth in 10 CFR 51.22(c)(9).
Pursuant to 10 CFR 51.22(b) no environmental impact statement or environmental assessment need be prepared in connection with the issuance of the amendment.
5.0 CONCLUSION
The Commission has 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, (2) such activities will be conducted in compliance with the Commission's regulations, and (3) the issuance of the amendment will not be inimical to the common defense and security or to the health and safety of the public.
Principal Contributor:
K. Cotton Date: February 16, 1995 4
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