ML20148K738
| ML20148K738 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 06/13/1997 |
| From: | NRC (Affiliation Not Assigned) |
| To: | |
| Shared Package | |
| ML20148K734 | List: |
| References | |
| NUDOCS 9706180340 | |
| Download: ML20148K738 (3) | |
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Q NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20W50001 SAFETY EVALUATION BY THE OFFICE OF SUCLEAR REACTOR REGULATION RELATED TO AMENDMENT NOS. 195 AND 178 TO FACILITY OPERATING LICENSE NOS. DPR-70 AND DPR-75 PUBLIC SERVICE ELECTRIC & GAS COMPANY PHILADELPHIA ELECTRIC COMPANY DELMARVA POWER AND LIGHT COMPANY ATLANTIC CITY ELECTRIC COMPANY SALEM NOCLEAR GENERATING STATION. UNIT NOS. 1 AND 2 RQ_CKET NOS. 50-272 AND 50-311
1.0 INTRODUCTION
By letter dated January 31, 1997, the Public Service Electric & Gas Company (the licensee) submitted a request for changes to the Salem Nuclear Generating Station, Unit Nos. I and 2, Technical Specifications (TSs).
The requested changes would replace the existing requirement to average the temperatures at any 5 of 10 listed locations within the containment with the requirement to verify that the average containment temperature is within the limit (i.e.,
s120*F).
2.0 BACKGROUND
The containment average air temperature is required to be taken daily (in Modes 1 through 4) to ensure it does not exceed the initial temperature condition assumed in the applicable design basis accident analyses.
Currently, TS surveillance requirement 4.6.1.5 lists 10 sample locations and requires that the temperatures at any 5 of these locations be averaged once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> to veri #v the containment average temperature is acceptable.
However, the licensee has determined that a representative average may not be obtained if "any" five sar.iples are used as currently allowed by the TSs. This situation was discovered by the licensee and subsequently reported in Licensee Event Report 272/95-004-00 on May 18, 1995. To conect this TS weakness, the licensee specified (in a procedure) the acceptable sample locations that had to be used (thus ensuring a representative sample is obtained). However, the licensee has since reevaluated this issue and determined it would be more appropriate to revise the TSs to correct this shortcoming.
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. 3.0 EVALUATION Due to giving plant operators a choice of 5 out of 10 sample locations, verbatim compliance with current TS surveillance requirement 4.6.1.5 could lead to inaccurate containment average temperature determinations. To correct this problem, the licensee is proposing to revise TS surveillance 4.6.1.5 to J
l state:
Verify containment average air temperature is within limit at least once per twenty four hours.
The staff's guidance for containment air temperature surveillance requirements for Westinghouse plants is contained in NUREG-1431, " Standard Technical Specifications, Westinghouse Plants," Rev. 1, April 1995 (NVREG-1431).
The recommended wording in NUREG-1431 is:
Verify containment average air temperature is within limit (every 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />s].
The licensee's proposed TS surveillance requirement 4.6.1.5 is consistent with the staff's recommended applicable NUREG-1431 wording. Also, as discussed above, the purpose of this TS surveillance requirement is to maintain the validity of the applicable design basis accident analyses by ensuring the containment ten.perature assumptions used. in the analyses are not exceeded.
4 The licensee's proposed wording for TS surveillance requirement 4.6.1.5 provides more appropriate wording for ensuring that the applicable design basis accident analysis assumptions will not be exceeded (by ensuring the i
sample consistently represents the containment average temperature).
Therefore, the licensee's proposal to revise the wording of TS surveillance requirement 4.6.1.5 is acceptable.
The licensee also proposed to revise the TS Bases by adding the following statement:
In order to determine the containment average air temperature an average is calculated using measurements taken at locations within containment selected to provide a representative sample of the overall containment atmosphere.
The licensee's proposed TS Bases wording is consistent with the staff's recommendations in bases section B 3.6.5A of NUREG-1431 and is therefore acceptable.
4.0 STATE CONSULTATION
In accordance with the Commission's regulations, the New Jersey State official was notified of the proposed issuance of the amendments.
The State official had no comments.
5.0 ENVIRONMENTAL CONSIDERATION
The amendments change the surveillance requirements. The NRC staff has determined that the amendments involve 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 l
proposed finding that the amendments involve no significant hazards consideration, and there has been no public comment on such finding (62 FR 11497). Accordingly, the amendments meet the eligibility criteria for categorical exclusion set forth in 10 CFR 51.22(c)(9).
Pursuant to 10 CFR i
51.22(b) no environmental impact statement or environmental assessment need be
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prepared in connection with the issuance of the amendments.
6.0 CONCLUSLQM The Commission has concluded, based on the considerations discussed above, that:
(1) there is reasonable assurance that t'e health and safety of the n
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 amendments will not be inimical to the common 1
defense and security or to the health and safety of the public.
Principal Contributor:
S. Dembek Date: June 13, 1997
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