ML20086G649
| ML20086G649 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 07/11/1995 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20086G641 | List: |
| References | |
| NUDOCS 9507170036 | |
| Download: ML20086G649 (2) | |
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. UNITED STATES i
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. NUCLEAR REGULATORY COMMISSION
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' SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR' REGULATION RELATED TO ANENDMENT NO. 116-l TO FACILITY OPERATING LICENSE NO. NPF '
NORTHEAST NUCLEAR ENERGY COMPANY.'ET AL.
MILLSTONE NUCLEAR POWER STATION.' UNIT NO. 3 DOCKET NO. 50-423
1.0 INTRODUCTION
By letter dated January 10, 1995, the Northeast Nuclear Energy Company, (the licensee), submitted a request for changes to the Ni11 stone Nuclear Power Station, Unit No. 3 Technical Specifications (TS). The requested changes would revise the Technical Specifications to delete the power range negative flux trip from Tables 2.2-1, 3.3-1, and 4.3-1, and delete the' associated Bases Section 2.0.
2.0-BACKGROUND A plant safety analysis supporting the use of VANTAGE 5 fuel at Ni11 stone 3 i
was submitted to the Nuclear Regulatory Commission'(NRC).in an application for-amendment dated November 1, 1990. The NRC staff' subsequently found the safety analysis for VANTAGE 5 fuel. acceptable and issued Amendment No. 60 on'Narch-11, 1991. The safety analysis provided mechanical, nuclear, electrical, and hydraulic accident evaluations.
In the accident' analyses, the dropped rod.-
cluster control assembly (RCCA) event did not take credit for any. direct reactor trip or for an' automatic power reduction due to the dropped RCCA.
=Therefore, no credit was taken for the negative flux rate trip in the plant safety analyses. Since the negative flux rate trip was not credited in the accident analysis, the licensee has proposed to delete the negative flux rate trip from the' functional unit of the reactor trip system instrumentation setpoints.
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-3.0 EVALUATION The licensee proposed to delete the negative flux rate trip from the TS. The proposed changes affect TS Bases'Section 2.0, and Tables 2.2-1, 3.3-1,-and 4.3-1.
The basis for these changes lies in the safety analyses for VANTAGE 5 fuel in which no credit was taken in the plant safety analysis for the negative flux rate. trip. Any reference to the power range negative rate trip' will be deleted from the aforementioned TS Tables and the associated Bases 1
Section. The proposed changes were reviewed by the NRC staff and found to be.
1 acceptable. The_ revised TSs do not reduce plant safety since the plant safety-E analyses did not take credit for the negative flux rate trip.
9507170036 950711 PDR.ADOCK 05000423
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4.0 STATE CONSULTATION
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In accordance with the Commission's regulations,-the Connecticut State official was notified of the proposed. issuance of the amendment. The State t
official had no comments.
j S.0 ENVIR0 MENTAL CONSIDERATION o
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 1
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 connent on such finding -(60 FR 11135). Accordingly, the amendment meets the eligibility criteria for categorical exclusion set forth in 10 CFR 51.21(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.
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the awndment.
6.0 CONCLUSION
The Commission has concluded, based on the considerations discussed above, I
that:
(1) there is reasonable assurance that the health and safety of'the i
public will_not be endangered by operation in the proposed manner,.(2) such activities will be conducted in compliance with the Commission's regulations, 1
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. Schwenk i
Date:
July 11, 1995 l
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