ML20245C252
| ML20245C252 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 06/15/1989 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20245C234 | List: |
| References | |
| NUDOCS 8906260105 | |
| Download: ML20245C252 (3) | |
Text
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NUCLEAR REGULATORY COMMISSION c
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i SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION SUPPOPTING AMENDMENT NO. 24 TO FACILITY OPERATING LICENSE NO. NPF-39 PHILADELPHIA ELECTRIC COMPANY j
LIMERICK GENERATING STATION, UNIT 1 DOCKET NO. 50-352
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1.'O INTRODUCTION I
By latter dated April 10, 1989, Philadelphia Electric Company (the j
licensee) requested an amendment to Facility Operating License No. NpF-39 for the Limerick Generating Station,(TS) to reflect the incorporation of Unit 1.
The proposed amendment would revise the Technical Specifications Unit 2 power supplies needed to support common equipment used in operation of Unit 1.
2.0 DISCUSSION The proposed TS revision is needed to reflect modifications necessary to change from the current single-unit power supply configuration to a two-unit power supply configuration. These modifications implement the final electrical configuration of the original two-unit design that was revicwed and approved by the NRC in the Safety Evaluation Report (SER),
NUREG 0991, dated August,1983. The final design electrical configuration for Unit 2 power supplies feeding comon system components is reflected in the proposed TS to ensure the proper interdependence between Unit 1 and Unit 2.
This philosophy of interdependence currently is reflected in the Unit 2 TS, which are in the final stages of development. The proposed changes, therefore, would provide a consistent application to both Unit 1 and Unit 2.
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Presently, common Class IE spray pond Motor Control Centers (MCCs) 0085212C and 008522ZO are fed from Unit 1 Class IE 480V AC load centers 10B203ZC and 10B204ZD, respectively. These two safeguard MCCs suppiy power to spray pond safety related loads associated with Divisions 3 and 4 of the safety related electrical equipment. These spray pond loads are l
common to both units and are required for achievino and maintaining safe I
shutdown of both units. Loads include the valves associated with the Residual Heat Remoul Service Water (RHRSW)/ Emergency Service Water (ESW) spray pond subsystem. These valves automatically reposition when their associatedESWpumps('C'and'D') start. This TS revision would transfer l
these safecuard spray pond MCCs to Unit 2 Class IE 480V AC load centers 20B203ZC and 20B204ZD. Similarly, the Class IE 125V DC control power for j
these components will be transferred to the corresponding Unit 2 power i
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supply. The proposed TS change will make AC and DC power supplies to these components consistent with respect to the unit associated with their supply. That is, AC and DC power supplies to a component would come from the same electrical division in the same unit.
l In ACTIONS 3.8.3.1.c and 3.8.3.2.c, the staff proposed a minor l
administrative revision, which the licensee accepted, to change l
" associated common system" to " associated common equipment" to more l
accurately define the requirement and to delete " fed from the deenergized source." These changes are administrative and editorial made for clarity.
These revisions provide no change in technical content or intent of the specifications proposed by the licensee and no reduction in the margin of j
safety.
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i 3.0 EVALUATION The licensee proposes to revise Unit 1 Technical Specifications 3.8.3.1 and 3.8.3.2.
These items establish the AC and DC power distribution line-up for components that serve both Unit 1 and Unit 2.
During i
construction of Unit 2, these commt;n components were powered from Unit 1 I
only. This revision to the Unit 1 Technical Specifications would I
transfer the power supply for some of the common components to Unit 2,
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while leaving the remainder powered from Unit I as they are at present.
This sharing of power supplies to comon equipment establishes the i
philosophy of interdependency between the Units and implements the final electrical configuration of the two-unit station design that was reviewed and approved by the staff in the Limerick Safety Evaluation Report (SER dated August, 1983.
4.0 ENVIRONMENTAL CONSIDERATION
This amendment involves a change to a requirement with respect to 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 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 Comission has previously issued a proposed finding that this amendment involves no significant hazards consideration and there has been no public coment on such finding.
Accordingly, this 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 nor environmental assessment need be j
prepared in connection with the issuance of this amendment.
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5.0 CONCLUSION
The Comission made a proposed determination that the amendment involves no significant hazards consideration which was published in the Federal Register (54 FR 18955) on May 3, 1989 and consulted with the State of l
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Pennsylvania. No public comments were received and the State of Pennsylvania did not have any comments.
The' staff has concluded, based on the considerations discussed above,.
I 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
. i (2) 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.the security nor to the health and safety of the public.;
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Principal Contributor:
E.'H. Trottier Dated: June 15, 1989
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