ML20077A730
| ML20077A730 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 11/18/1994 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20077A728 | List: |
| References | |
| NUDOCS 9411250173 | |
| Download: ML20077A730 (2) | |
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4 UNITED STATES E
NUCLEAR REGULATORY COMMISSION f
WASHINGTON, D.C. 20555-0001
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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMENDMENT NO.120 TO FACILITY OPERATING LICENSE NO. NPF-12 SOUTH CAROLINA ELECTRIC & GAS COMPANY SOUTH CAROLINA PUBLIC SERVICE AUTHORITY VIRGIL C. SUMMER NUCLEAR STATION. UNIT NO. 1 DOCKET NO. 50-395
1.0 INTRODUCTION
By letter dated July 20, 1994, South Carolina Electric & Gas Company (the licensee), submitted a request for changes to the Virgil C. Summer Nuclear Station, Unit No. 1, (Summer Station) Technical Specifications (TS).
The proposed change would modify TS Tables 2.2-1, " Reactor Trip System Instrumentation Setpoints," and 3.3-4, " Engineered Safety Features Actuation System Instrumentation Trip Setpoints," and several associated bases.
The proposed change would remove three columns from the Tables.
The columns contain specific rack and sensor allowable drift values.
2.0 EVALUATION Before the issuance of 10 CFR 50.73 on July 26, 1983, the reportability of reactor trip system and engineered safety features actuation system discrepancies was governed by the TS.
The TS were specifically designed so that if an instrument setpoint was determined to be less conservative than a specified value, the condition would not be reportable as long as certain instrument drift conditions were met. Whether or not these conditions were met was determined by substituting the instruments individual allowable drift values, as specified in the TS, into an equation.
If the equation was satisfied, the incident was not reportable.
Since the issuance of 10 CFR 50.73, a reactor trip system or engineered safety features actuation system instrument discrepancy is not reportable unless instrument function is lost.
The licensee no longer has a need for the drift values specified in the three columns of the TS tables covering these instruments because the reportability of a discrepancy is specifically governed by 10 CFR 50.73.
The removal of the three columns from the TS has no impact on plant operation or safety and is acceptable.
The proposed amendment also makes a correction to the definition of OVERPOWER DELTA T on page 2-10 due to a typographical error.
This change is acceptable.
9411250173 941118 PDR ADOCK 05000395 P
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3.0 STATE CONSULTATION
In accordance with the Commission's regulations, the State of South Carolina official was notified of the proposed issuance of the amendmert.
The State official had no comments.
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 co
,t on such finding (59 FR 47181). 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:
G. Wunder Date: November 18, 1994 l
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