ML25270A003

Control Room Loss of Ventilation Due to Smoke Detector Failure Causing Common Supply Damper to Shut (Letter)

ML25270A003
Person / Time
Site:	Calvert Cliffs
Issue date:	09/29/2025
From:	Casey Smith Constellation Energy Generation
To:	Office of Nuclear Reactor Regulation, Document Control Desk
Shared Package
ML25270A002	List: 05000317/LER-2025-001, Control Room Loss of Ventilation Due to Smoke Detector Failure Causing Common Supply Damper to Shut ML25270A003
References
LER 2025-001-00
Download: ML25270A003 (1)

Text

Constellation~

September 29, 2025 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555

Subject:

Calvert Cliffs Nuclear Power Plant, Unit No. 1 Renewed Facility Operating License No. DPR-53 NRC Docket No. 50-317 Licensee Event Report 2025-001, Revision 00 Loss of Control Room CREVS and CRETS Christopher J. Smith Plant Manager Calvert Clrffs i~uclea, Power Plant 1650 Calvert Cliffs P?.r l,,wil'/

LuslJy. MD 20657 410-495 5208 Offrce 8i5 931 5902 Moeirle wv11*1 co11stellat°on corn 10 CFR 50.73 In accordance with the reporting requirements contained in 10 CFR 50.73(a)(2)(v)(D) and 50.73(a)(2)(vii), please find enclosed Calvert Cliffs Nuclear Power Plant Unit 1 Licensee Event Report (LER) 2025-001, Revision 00, Loss of Control Room CREVS and CRETS There are no regulatory commitments contained in this correspondence.

Should you have questions regarding this report, please contact Mr. Larry D. Smith at (667) 313-6503.

Respectfully, C

Christopher J. Smith Plant Manager CJS/TEL

Attachment:

LER 317-2025-001, Rev 00 cc:

NRC Project Manager, Calvert Cliffs NRC Regional Administrator, Region I NRC Resident Inspector, Calvert Cliffs Z. Barthel, DNR