ML22340A199

Report of Changes, Tests, Experiments Pursuant to 10 CFR 50.59(d)(2)

ML22340A199
Person / Time
Site:	Cook
Issue date:	11/30/2022
From:	Indiana Michigan Power Co
To:	Office of Nuclear Reactor Regulation
Shared Package
ML22340A137	List: AEP-NRC-2022-62, 1 to Updated Final Safety Analysis Report, Chapter 14.3, Reactor Coolant System Pipe Rupture (Loss of Coolant Accident) (Unit 1) ML22340A128 ML22340A129 ML22340A131 ML22340A132 ML22340A133 ML22340A134 ML22340A135 ML22340A136 ML22340A138 ML22340A139 ML22340A141 ML22340A142 ML22340A143 ML22340A144 ML22340A145 ML22340A146 ML22340A147 ML22340A148 ML22340A149 ML22340A150 ML22340A151 ML22340A152 ML22340A153 ML22340A154 ML22340A155 ML22340A156 ML22340A157 ML22340A158 ML22340A159 ML22340A160 ML22340A161 ML22340A162 ML22340A163 ML22340A164 ML22340A165 ML22340A166 ML22340A167 ML22340A168 ML22340A169 ML22340A170 ML22340A171 ML22340A172 ML22340A173 ML22340A174 ML22340A175 ML22340A176 ML22340A177 ML22340A178 ML22340A179 ... further results
References
AEP-NRC-2022-62
Download: ML22340A199 (2)

Text

Donald C. Cook Nuclear Plant Report of Changes, Tests, Experiments Pursuant to 10 CFR 50.59(d)(2)

As required by 10 CFR 50.59(d)(2), the following report contains brief descriptions of changes made to the facility and/or associated documentation, and summaries of the associated 50.59 evaluations.

SS-SE-2021- 0022- 00

Covid Risk Reduction - Ice Basket Weight Acceptance Criteria for Unit 2 Cycle 26

Activity

Description:

The Unit 2 ice con denser was returned to service after the Unit 2 spring 2021 outage without undergoing typical ice basket replenishment. The unit was approved to operate through the ensuing operating cycle with ice bed basket weights less than the safety analysis mean value.

Summary of the Evaluation:

Each applicable evaluation question was answered, No. Although ice bed replenishment was deferred for an operating cycle, it was shown that operation with some ice basket weights below the safety analysis mean value (but above a projected minimum) would continue to support all applicable design basis functional requirements. Specifically, it was shown using methods of evaluation consistent with those within the Updated Final Safety Evaluation Report ( UFSAR) (where applicable) that the ice bed would continue to ensure sufficient ice mass, heat transfer area, flow passages, and ice distribution would be provided in the ice condenser so that the magnitude of a pressure and temperature transients resulting from accidents described in the UFSAR would not exceed the containment design pressure or temperature.

Page 1 of 8 Donald C. Cook Nuclear Plant Report of Changes, Tests, Experiments Pursuant to 10 CFR 50.59(d)(2)

SS-SE-2022 -0006- 00

Revise Ice Basket Weight Acceptance Criteria for Unit 1 Cycle 31

Activity

Description:

The Unit 1 ice condenser was returned to service after the Unit 1 spring 2022 outage without undergoing typical ice basket replenishment. The unit was approved to operate through the ensuing operating cycle with ice bed basket weights less than the safety analysis mean value.

Summary of the Evaluation:

Each applicable evaluation question was answered, No. Although ice bed replenishment was deferred for an operating cycle, it was shown that operation with some ice basket weights below the safety analysis mean value (but above a projected minimum) would continue to support all applicable design basis functional requirements. Specifically, it was shown using methods of evaluation consistent with those within the UFSAR (where applicable) that the ice bed would continue to ensure sufficient ice mass, heat transfer area, flow passages, and ice distribution would be provided in the ice condenser so that the magnitude of a pressure and temperature transients resulting from accidents described in the UFSAR would not exceed the containment design pressure or temperature.

Page 2 of 8