ML20215A005

Safety Evaluation Supporting Amend 36 to License NPF-22

ML20215A005
Person / Time
Site:	Susquehanna
Issue date:	06/05/1987
From:	Office of Nuclear Reactor Regulation
To:
Shared Package
ML20214X322	List: ML20214X320 ML20214X384 ML20215A005
References
NUDOCS 8706160466
Download: ML20215A005 (2)

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UNITED STATES NUCLEAR REGULATORY COMMISSION

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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION -

SUPPORTING AMENDMENT NO. 36 TO FACILITY OPERATING LICENSE N0. NPF-22 PENNSYLVANIA POWER & LIGHT COMPANY ALLEGHENY ELECTRIC COOPERATIVE, INC.

DOCKET NO. 50-388 SUSOUEHANNA STEAM ELECTRIC STATION, UNIT 2

1.0 INTRODUCTION

By letter dated March 27, 1986, as revised April 18, 1986, March 2 and April 3,1987, , Pennsylvania Power & Light Company (licensee) requested an amendment i

to Facility Operating License No. NPF-22 for the Susquehanna Steam Electric Station, Unit 2. The proposed amendment would change the Technical Specifi-cations to support Drywell Cooling System modifications which will enhance the capability of the present drywell cooling system. Similar changes were previously approved for Unit No. 1 in Amendment No. 46 to NPF-14.

The licensee has proposed a change which entails revising the Limiting Condition for Operation reflecting the replacement of the unit cooler sub-system with two recirculation fans. In the modified mode, the unit cooler subsystea will serve the general drywell area and the new recirculation fans will serve the safety-related function of post-LOCA drywell atmosphere mixing.

The ACTION statement, Surveillance Requirements, and Table 3.8.4.1-1 will be changed to be consistent with the drywell cooling system modifications.

2.0 EVALUATION The staff has reviewed the licensee's request and finds that a change, identical to the proposed change to replace the unit cooler subsystem with two recirculation fans, was previously approved for Unit 1 in Amendment No. 46.

Since the safety-related operation of the new recirculation fans is the same i

as that of the unit cooler subsystem being replaced, the propesed change will )

I have no impact on the post-LOCA functions of the subsystem. Therefore, the replacement in the Technical Specifications of the unit cooler subsystem by the new fans is acceptable.

The licensee has proposed to add two pairs of type NFB-TM circuit breakers to Table 3.8.4.1-1, related to primary conteinment penetration conductor over-current protective devices. Type HFB-TM circuit breakers were analyzed by the licensee in the FSAR. The licensee's analysis demonstrated that electrical  ;

power conductors are sized to withstand, without loss of mechanical integrity, the maximum available fault current for sufficiently long periods to allow l

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e backup circuit protection to operate. Therefore, incorporation of two addi-tional previously approved type HFB-TM circuit breakers in the Technical Specification Table 3.8.4.1-1 is acceptable.

3.0 ENVIRONMENTAL CONSIDERATION

This amendment involves changes to requirements with respect to the installation and use of facility components located within the restricted area as defined in 10 CFR Part 20 and a change to the surveillance requirements.

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 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, orical exclusion set this forth amendment meets the in 10 CFR 51.22(c)(9). eligibility Pursuant criteria to 10 for categ(b) no environmental CFR 51.22 impact statement nor environmental assessment need be prepared in connection with the issuance of this amendment.

4.0 CONCLUSION

The Commission made a proposed determination that the amendment involves no significant hazards consideration which was published in the Federal Register (51 FR 16932) on May 7,1986 and consulted with the State of Pennsylvenia.

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, 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 this amendment will not be inimical to the common defense and security nor to the health and safety of the public.

Principal Contributors: M. C. Thadani, A. Notafrancesco S. Rhow Dated: June 5, 1987 l

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