ML20050A515
| ML20050A515 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 03/23/1982 |
| From: | TOLEDO EDISON CO. |
| To: | |
| Shared Package | |
| ML20050A509 | List: |
| References | |
| 798, TAC-48044, NUDOCS 8204010363 | |
| Download: ML20050A515 (6) | |
Text
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Docket No. 50-346 License No. NPF-3 Serial No. 798 March 23, 1982
' Attachment I.
Changes to Davis-Besse Nuclear Power Station Unit 1, Appendix A Technical Specifications Figures 3.1-2a and 3.1-3a of Cycle 3 Reload Report BAW-1707 (Figures 8-5 and 8-10 of the report).
A.
Time required to Implement.
This change is to be effective upon NRC approval.
B.
Reason for Change (Facility Change Request 80-268 Supplement 2).
The final burnup of Cycle 2 at Davis-Besse lies within the 306+10 EFPD window..This results in the relaxation of the regulating rod insertion limits for the first 60 EFPD of Cycle 3.
C.
Safety Evaluation (See attached) f f
a P
J.
SAFETY EVALUATION i
i
.This request provides the revised regulating rod insertion limits for four 1,
and-three pump operation during the first 60 effective full power days of
' Cycle 3 operation. The safety function of these limits is to ensure maintenance'of acceptable power distribution limits and shutdown margin.
These limits.also control the potential effects of a-rod ejection i
accident.
.The relaxation in the attached curves (limits) is brought about by the final burnup;of Cycle 3 (296 EFPD) which lies in the 306i10 window of the revised Cycle 2 (complete' withdrawal of axial power shaping rods and i
coasting down of power level towards the end of cycle) design.
Per the analysis provided in the reload report and the safety evaluation j
'in~ Toledo Edison submittal of March 5. 1982'(Serial No. 787), it is
! concluded that the inferences of the reload analysis and the previous safety-evaluation are not violated. Hence, it is concluded that the changes preposed herewith do not involve an unreviewed safety question.
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(223 I02)
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Figure 8-10.
Regulating Group Position Limits. O to 60 EFPD, Three RC Pumps - Davis Besse 1. Cycle 3 (Tech Spec Figure 3.1-3a) 1 100 -
k.
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