05000282/LER-2024-001, Auxiliary Building Special Ventilation System Inoperable During Movement of Irradiated Fuel Assemblies

Auxiliary Building Special Ventilation System Inoperable During Movement of Irradiated Fuel Assemblies

ML24260A256
Person / Time
Site:	Prairie Island
Issue date:	09/16/2024
From:	Currier B Northern States Power Company, Minnesota, Xcel Energy
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
L-Pl-24-041 LER 2024-001-00
Download: ML24260A256 (1)

LER-2024-001, Auxiliary Building Special Ventilation System Inoperable During Movement of Irradiated Fuel Assemblies

Event date:
Report date:
Reporting criterion:	10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications
2822024001R00 - NRC Website

text

(l Xcel Energy*

September 16, 2024 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 Prairie Island Nuclear Generating Plant, Units 1 and 2 Docket Nos. 50-282 and 50-306 Renewed Facility Operating License Nos. DPR-42 and DPR-60 1717 Wakonade Drive Welch, MN 55089 L-Pl-24-041 10 CFR 50.73 Prairie Island Nuclear Generating Plant Licensee Event Report 2024-001-00 Northern States Power Company, a Minnesota corporation, doing business as Xcel Energy (hereafter "NSPM"), hereby submits Licensee Event Report (LER) 50-282/2024-001-00 per 10 CFR 50.73(a)(2)(i)(B).

Summary of Commitments This letter makes no new commitments and no revisions to existing commitments.

L BryanV urrier Plant Manager, Prairie Island Nuclear Generating Plant Northern States Power Company - Minnesota Enclosure cc:

Administrator, Region Ill, USNRC Project Manager, Prairie Island, USNRC Resident Inspector, Prairie Island, USNRC State of Minnesota

ENCLOSURE PRAIRIE ISLAND NUCLEAR GENERATING PLANT LICENSEE EVENT REPORT 50-282/2024-001-00 4 pages follow

Abstract

Prairie Island Nuclear Generating Plant, Unit 1

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Auxiliary Building Special Ventilation System Inoperable during movement of irradiated fuel assemblies.

05 02 2024 2024 001 00 09 16 2024 Prairie Island Unit 2

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100

Nathan Fedora 612-342-8971

10 31 2024 On May 02, 2024, the Prairie Island Nuclear Generating Plant (PINGP) Units 1 and 2 were operating at 100 percent power while performing fuel handling operations. For a 33-minute period between 12:52 and 13:25, radiation monitors 1R-37 and 2R-30 were both out of service while movement of irradiated fuel assemblies was occurring. On July 11, 2024, while completing a review of the design and licensing basis of radiation monitors 1[2]R-37, 1[2]R-30, it was determined that these monitors are required for Auxiliary Building Special Ventilation System operability during movement of irradiated fuel assemblies per Technical Specification (TS) 3.7.12. Changes to Procedures have been implemented. This will ensure compliance with TS going forward when irradiated fuel is being moved. Additional causes and corrective actions will be provided as a supplement to this LER.

This event is reportable under 10 CFR 50.73(a)(2)(i)(B) for an Operation or Condition Prohibited by Technical Specifications.Page of

3. LER NUMBER YEAR SEQUENTIAL NUMBER REV NO.

052 050 CAUSE OF THE EVENT The cause of this event is being investigated and will be provided in a supplement to this LER.

Initial review has determined that a lack of procedural guidance related to the function of the radiation monitors contributed to the event.

CORRECTIVE ACTIONS Changes to Procedures have been implemented. This will ensure compliance with TS going forward when irradiated fuel is being moved.

Additional corrective actions will be provided in the supplement to this LER.

PREVIOUS SIMILAR EVENTS There were no previous similar events in the past three years.

ADDITIONAL INFORMATION All times are in Central Daylight Time.

Energy Industry Identification System (EIIS) codes are identified in the text as [XX].

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Prairie Island Nuclear Generating Plant, Unit 1

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