05000483/LER-2023-001, Submittal of LER 2023-001-00 for Callaway, Unit 1, Inoperable Instrument Tunnel Sump Level Indication Resulted in Condition Prohibited by Technical Specifications

Submittal of LER 2023-001-00 for Callaway, Unit 1, Inoperable Instrument Tunnel Sump Level Indication Resulted in Condition Prohibited by Technical Specifications

ML23333A142
Person / Time
Site:	Callaway
Issue date:	11/29/2023
From:	Witt W Ameren Missouri, Union Electric Co
To:	Office of Nuclear Reactor Regulation, Document Control Desk
Shared Package
ML23333A141	List: 05000483/LER-2023-001, Submittal of LER 2023-001-00 for Callaway, Unit 1, Inoperable Instrument Tunnel Sump Level Indication Resulted in Condition Prohibited by Technical Specifications
References
ULNRC-06843 LER 2023-001-00
Download: ML23333A142 (1)

LER-2023-001, Submittal of LER 2023-001-00 for Callaway, Unit 1, Inoperable Instrument Tunnel Sump Level Indication Resulted in Condition Prohibited by Technical Specifications

Event date:
Report date:
4832023001R00 - NRC Website

text

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Am#r8fl Callaway Plant MISSOURI November 29, 2023 ULNRC-06$43 u.s. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-000 1 10 CFR 50.73(a)(2)(i)(B)

Ladies and Gentlemen:

DOCKET NUMBER 50-483 CALLAWAY PLANT UNIT 1 UNION ELECTRIC CO.

RENEWED FACILITY OPERATING LICENSE NPF-30 LICENSEE EVENT REPORT 2023-001-00:

INOPERABLE INSTRUMENT TUNNEL SUMP LEVEL INDICATION RESULTED IN CONDITION PROHIBITED BY TECHNICAL SPECIFICATIONS The enclosed Licensee Event Report (LER) is submitted in accordance with 1 OCFR5O.73(a)(2)(i)(B) to report a violation ofTechnical Specification (TS) 3.4.15, RCS Leakage Detection Instrumentation, due to inoperability ofthe containment instrument tunnel sump monitoring system.

This letter does not contain new commitments.

Sincerely,

/) ,

Warren A. Witt Senior Director, Nuclear Operations and Plant Manager Enclosure LER 2023-001-00

$315 County Road 459  : Steedman, MO 65077  : AmerenMissouri.com

ULNRC-06843 November 29, 2023 Page2of3 cc: Mr. John Monninger Regional Administrator U. S. Nuclear Regulatory Commission Region IV 1600 East Lamar Boulevard Arlington, TX 76011-4511 Senior Resident Inspector Callaway Resident Office U.S Nuclear Regulatory Commission 8201 NRC Road Steedman, MO 65077 Mr. M. Chawla Project Manager, Callaway Plant Office ofNuclear Reactor Regulation U.S. Nuclear Regulatory Commission Mail Stop O8B1A Washington, DC 20555-0001

ULNRC-06843 November 29, 2023 Page3of3 Index and send hardcopy to QA File A160.0761 Hardcopy:

Certrec Corporation 6500 West Freeway, Suite 400 FortWorth,TX 76116

( Certrec receives ALL attachments as long as they are non-safeguards and may be publicly disclosed.)

Electronic distribution for the following can be made via LER ULNRC Distribution:

F. M. Diya K. C. Scott W. A. Witt B. L. Jungmann T. A. Witt T. B. Elwood A. M. Roselius Corporate Oversight N$RB Secretary Performance Improvement Coordinator Resident Inspectors (NRC)

STARS Regulatory Affairs Mr. Jay Silberg (Pillsbury Winthrop Shaw Pittman LLP)

Ms. Kathleen McNelis (Public Service Commission)

Ms. Claire Eubanks (Public Service Commission)