ML17251A507
| ML17251A507 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 05/22/1989 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML17251A506 | List: |
| References | |
| NUDOCS 8906010030 | |
| Download: ML17251A507 (2) | |
Text
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UNITED STATES NUCLEAR REGULATORY COMMlSSION WASHINGTON, D. C. 20555 SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION SUPPORTING AHEtlDNENT HO. 36 TO FACILITY OPERATING LICEttSE NO. DPR-18 ROCHESTEP.
GAS AHD ELECTRIC CORPOPAT?ON R.
E.
GINt(A NUCLEAR POMER PLANT DOCKET HO. 50-244
- 1. 0 INTRODUCTION By letter dated February 24.
1989, the licensee, Rochester Gas 8 Electric Corporation, proposed changes to the Ginna Technical Specifications which would modify the rod insertion limits for Cycle 19 fuel reload to ensure that all criteria for the reload are met.
Since the change is not applicable to future cycles, it is presented as a change with a limited period of app licab i lity.
2.0 EVALUATION The Cycle 19 reload has been designed by Westinghouse using standard design methodology.
Based on this methodology, all criteria for the reload are met provided a slight adjustment is made to the bank D insertion limits.
This Technical Specification change will slightly modify the rod insertion limits for Cycle 19 to ensure all criteria are met.
The adjustment is only necessary for Cycle 19, since Cycle 18 exceeded a
burnup of 12150 HWD/NTU, and is only applicable for Cycle 19 burnups from 5250 to 9500 MWD/MTU.
(Since 9500 NMD/HTU is close to Cycle 19 end of cycle, the 9500 burnup has been extended to end of cycle for this application).
The amount by which the 1.66 FM limit could be exceeded with the current insertion limits varies from OX at a Cycle 18 burnup of 12150 MWD/HTU to a
maximum of 0.33K at a Cycle 18 burnup of 12300 HWD/NTU.
The limit is not exceeded if the bank D insertion limit is raised by 2.25K (5 steps) at full power.
Since this change is not applicable to future cycles, it is a change with a limited period of applicability with appropriate qualifiers.
No other safety criteria are affected by the Cycle 19 core reload.
The proposed change would require the bank D control rods to be withdrawn 5
steps farther during full power operation, Withdrawing the rods above the insertion limit increases the shutdown margin, decreases the ejected rod worth, reduces power peaking, and does not alter stuck rod worth.
Therefore, withdrawing the rods is conservative and ensures that the safety criteria for the Cycle 19 reload are met, there is no significant increase in the probability or consequences of an accident previously evaluated.
Thus the staff finds the proposed change acceptable for Cycle 19.
S5'06010030 890522 PDR ADOCK 05000244 P
3.0 ENVIRONMENTAL EVALUATION This amendment involves a change in the installation or use of a facility component located within the restricted areas as defined in 10 CFR Part 20.
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 published in the Federal Register a proposed finding that this amendment involves no significant hazards consideration, (54FR15837) April 19, 1988.
There has been no public comment on such finding.
Accordingly, this 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 this amendment.
- 4. 0 CONCLUSION We have concluded, based on the consideration discussed above, that there is a reasonable assurance that the health and safety of the public will not be endangered by operation in the proposed
- manner, and such activities wi 11 be conducted in compliance with the Commission's regulations.
The issuance of the amendment wi 11 not be inimical to the common defense and security or to the health and safety of the public.
Principal Contributor:
P.
Sears Dated:
May 22, 1989