NRC-24-0041, Technical Specification (TS) 5.6.7 - Post Accident Monitoring Report

Technical Specification (TS) 5.6.7 - Post Accident Monitoring Report

ML24173A048
Person / Time
Site:	Fermi
Issue date:	06/21/2024
From:	Domingos C DTE Electric Company
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
NRC-24-0041
Download: ML24173A048 (1)

Text

June 21, 2024 NRC-24~0041 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555-0001 Fermi 2 Power Plant NRC Docket No. 50-341 NRC License No. NPF-43 Christopher P. Domingos Site Vice President DTE Electric Company 6400 N. Dixie Highway, Newport, MI 48166 Tel: 734.586.5025 Fax: 734.586.5295 Email: chri siopher. dom ingos0)dteenern:v. com DTE 10CFR50.4

Subject:

Technical Specification (TS) 5.6.7 ~PostAccidentMonitoring.Report DTE Electric Company (DTE) is submitting this report pursuant to Fermi 2 Technical Specification (TS) 3.3.3.1, "Post Accident Monitoring Instrumentation" and TS 5.6.7, "Post Accident Monitoring Report." The enclosure to this letter contains the report regarding the inoperability of Division 2 CHRRMS. On May 7, 2024, Fermi 2 entered TS 3.3.3.l Condition A due to Division 2 CHRRMS failing downscale. On June 7, 2024, Fermi 2 entered TS 3.3.3.l Condition B as Division 2 CHRRMS remained inoperable for 30 days, requiring this special report to the NRC pursuant to TS 5.6. 7.

No new commitments are being made in this submittal.

Should you have any questions or require additional information, please contact Mr. Eric Frank at (734) 586-4772.

Sincerely, CJ4~

Christopher P. Domingos Site Vice President

USNRC NRC-24-0041 Page 2

Enclosures:

Technical Specification 5.6.7 Post Accident Monitoring Instrumentation 14-Day Report for Division 2 CHRRMS cc: NRC Project Manager NRC Resident Office Regional Administrator, Region III

to NRC-24-0041 Fermi 2 NRC Docket No. 50-341 Operating License No. NPF-43 Technical Specification 5.6.7 Post Accident Monitoring Instrumentation 14-Day Report for Division 2 CHRRMS

Post Accident Monitoring Instrumentation Report Inoperable Division of Containment High Range Radiation Monitor (CHRRM)

Alternate Monitoring Method.

Indication from Division 1 CHRRMS has been verified and will serve as the alternate monitoring method for Division 2 CHRRMS until it is restored to operability.

Apparent Cause of Inoperability.

Troubleshooting of the Division 2 CHRRMS has confirmed the failure of the associated Power Supply, D11K817B, as the cause of the downscale indication and subsequent inoperability.

Plan/Schedule to restore operability.

The current time to restore Division 2 CHRRMS is August 31, 2024. Two parallel paths are being pursued:

Path 1 is the Division 2 CHRRMS replacement project, which is projected to be implemented by July 30, 2024.

Path 2 is to install a new power supply, which is projected to be implemented by August 31, 2024. (Based on delivery of the new component).