ML17056A907
| ML17056A907 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 06/19/1990 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML17056A906 | List: |
| References | |
| NUDOCS 9006270054 | |
| Download: ML17056A907 (4) | |
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0 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 SAFETY. EVALUATION-BY-THE OFFICE-OF NUCLEAR-REACTOR-REGULATION RELATED-TO-AMENDMENT-NQ.. 16. - - TO-FACILITY OPERATING - LICENSE. NO.
NPF-69 NIAGARA-MOHAWK.POWER-CORPORATION NINE MILE.POINT-NUCLEAR-STATION -UNIT NO.-2 DOCKET-NO.59-410 INTRODUCTION By letter dated December 8, 1989, Niagara Mohawk Power Corporation (the licensee) submitted a request for amendment to the Technical Specifications for Nine Mile Point, Unit 2, for cycle 2 operation.
The cycle 2 reload core will consist of GE fuel type GEBXBNB.
The GEBXBNB fuel was approved for reload in Amendment No.
18 to GESTAR II (NEDE-24011-P-A).
Due to the use of GE8X8NB fuel, the licensee recalculated the Minimum Critical Power Ratio (MCPR) Safety Limit and proposes changes in the Technical Specifications accordingly.
EVALUATION Section 2.1.2 Thermal Power The MCPR Safety Limit for cycle 2 with the GEBXBNB fuel type is proposed to change from 1.06 to 1.07.
The proposed MCPR limit is based on an approved methodology described in the approved Amendment No.
18 to NEDE-24011-P-A.
The degree of conservatism associated with the proposed new limit is the same as that of the existing MCPR limit in that there is an adequate margin to assure that more than 99.9 percent of the fuel rods in the core will not be expected to experience transition boiling during trans'ient events.
Based on the approved methodology and adequate conservatism, we conclude that the new MCPR limit of 1.07 is acceptable for use in cycle 2.
Section 3.4.1.1 Recirculation Loops The MCPR Safety Limit for cycle 2 with the GE8XBNB fuel type for operation with one recirculation loop is increased by 0.01.
This increase changes the Safety Limit from 1.07 to 1.08.
The proposed MCPR limit for operation with one recirculation loop is based on the approved Amendment No.
18 to NEDE-24011-P-A.
The degree of conservatism associated with the proposed new limit is the same as the existing limit in that it is representative of a margin relative to the conditions required to maintain fuel cladding integrity for single loop operation.
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Based on the approved methodology and adequate conservatism, we conclude that the new MCPR Safety Limit of 1.08 for single loop operation is acceptable for use in cycle 2.
SUMMARY
The staff has evaluated the licensee's request to increase the MCPR Safety Limit associated with cycle 2 operation.
Based on the approved methodology and adequate conservatism associated with the use of the approved GE type fuel GE8XBNB, we conclude that the proposed MCPR limit is acceptable for use in cycle 2 operation and poses no undue risk to the public health and safety.
ENVIRONMENTAL CONSIDERATION This amendment involves a change in a requirement with respect to the installation or use of the faci lity components located within the restricted areas as defined in 10 CFR 20.
The staff has determined that this 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, this amendment meets the eligibility criteria for categorical exclusion set forth in 10 CFR Sec 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 this amendment.
CONCLUSION 1<e have 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 these amendments will not be inimical to the common defense and security or to the health and safety of the public.
Dated:
3une 19, 1990 PRINCIPAL CONTRIBUTOR:
A.
Massey
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