ML24222A409

NRR E-mail Capture - Request for Additional Information Regarding Reactor Water Cleanup (RWCU) Pump Rooms - L-2023-LLA-0118

ML24222A409
Person / Time
Site:	Clinton
Issue date:	05/03/2024
From:	Joel Wiebe NRC/NRR/DORL/LPL3
To:	Nicely K Exelon Generation Co
References
L-2023-LLA-0118
Download: ML24222A409 (2)

Text

From:

Joel Wiebe Sent:

Friday, May 3, 2024 11:27 AM To:

Nicely, Ken M.:(Exelon Nuclear)

Subject:

L-2023-LLA-0118 - Request for Additional Information REQUEST FOR ADDITIONAL INFORMATION EXELON GENERATION COMPANY, LLC CLINTON POWER STATION, UNIT NO. 1 DOCKET NO. 50-461 EPID: L-2023-LLA-0118 REGULATORY BASIS:

10 CFR 50 Appendix A Criterion 4Environmental and dynamic effects design bases NRC GUIDANCE of RELEVANCE:

NUREG-0800 Section 5.4.8 Reactor Water Cleanup System (BWR) Revision 3 NUREG-0800 Section 3.4.1, Internal Flood Protection for Onsite Equipment Failures. Revision 3 NUREG-0800 Section 3.6.1, Plant Design For Protection Against Postulated Piping Failures In Fluid Systems Outside Containment, Revision 3

RAI 1

Provide a summary of the calculation(s) that evaluate high energy line breaks in the reactor water cleanup (RWCU) pump rooms and credit the temperature isolation.

RAI 2

Do the RWCU rooms have watertight doors? Can a line break in the RWCU pump rooms leak into the auxiliary building hallway such that the water flows down the floor plugs into the emergency core cooling system cubicles?

Hearing Identifier:

NRR_DRMA Email Number:

2574 Mail Envelope Properties (MN2PR09MB497122FE5394EBF0B86563F08B1F2)

Subject:

L-2023-LLA-0118 - Request for Additional Information Sent Date:

5/3/2024 11:27:03 AM Received Date:

5/3/2024 11:27:00 AM From:

Joel Wiebe Created By:

Joel.Wiebe@nrc.gov Recipients:

"Nicely, Ken M.:(Exelon Nuclear)" <ken.nicely@constellation.com>

Tracking Status: None Post Office:

MN2PR09MB4971.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 1007 5/3/2024 11:27:00 AM Options Priority:

Normal Return Notification:

No Reply Requested:

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