ULNRC-06802, Special Report 2023-01 (PAM Report); Non-Functionality of a Post-Accident Monitoring Instrument

Special Report 2023-01 (PAM Report); Non-Functionality of a Post-Accident Monitoring Instrument

ML23068A098
Person / Time
Site:	Callaway
Issue date:	03/09/2023
From:	Farnsworth D Ameren Missouri, Union Electric Co
To:	Office of Nuclear Reactor Regulation, Document Control Desk
Shared Package
ML23068A097	List: ML23068A099 ULNRC-06802, Special Report 2023-01 (PAM Report); Non-Functionality of a Post-Accident Monitoring Instrument
References
ULNRC-06802, 2023-01
Download: ML23068A098 (1)

Text

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WAmeren MISSOURI Callaway Plant March 9, 2023 ULNRC-06802 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 Ladies and Gentlemen:

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

RENEWED FACILITY OPERATING LICENSE NPF-30 SPECIAL REPORT 2023-01 (PAM REPORT):

NON-FUNCTIONALITY OF A POST-ACCIDENT MONITORING (PAM) INSTRUMENT The enclosed Special Report 2023-01 (PAM Report) addresses non-functionality of the unit vent high range noble gas monitor. Callaway Plant Final Safety Analysis Report (FSAR) 16.3.3.4 requires a unit vent high range noble gas monitor channel to be functional during MODES 1, 2, and 3. With the required unit vent high range noble gas monitor channel non-functional, required Action c specifies,

"... initiate the preplanned alternate method of monitoring the appropriate parameter(s) within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> and either restore the non-functional channel to FUNCTIONAL status within 7 days, or prepare and submit a Special Report to the Commission within the following 14 days outlining the preplanned alternate method of monitoring, the cause of the non-functionality, and the plans and schedule for restoring the channel to FUNCTIONAL status." Per these requirements, Callaway is submitting Special Report 2023-01 to the U.S. Nuclear Regulatory Commission (NRC).

No new commitments are identified in this correspondence. None of the material in this report is considered proprietary by Union Electric.

If you have any questions or require additional information, please contact Mr. Thomas B. Elwood, Supervising Engineer, Regulatory Affairs and Licensing at 314-225-1905.

Sincerely, 0

~~/0f/Y-z.

Senior Director, Nuclear Operations

• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 8315 County Road 459 Steedman, MO 65077 AmerenMissouri.com

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• ULNRC-06802 March 9, 2023 Page 2 of3

Enclosure:

Special Report 2023-01 PAM Report cc: Mr. Robert Lewis 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 of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Mail Stop O8B 1A Washington, DC 20555-0001

ULNRC-06802 March 9, 2023 Page 3 of 3 Index and send hardcopy to AQ File A160.0761 Hardcopy:

Certrec Corporation 6100 Western Place, Suite 1050 Fort Worth, TX 76107 (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 Responses and Reports ULNRC Distribution:

F. M. Diya K. Scott D. E. Farnsworth W. A. Witt B. L. Cox B. L. Jungmann T. A. Witt T. B. Elwood G. P. Rauch D. T. Harris NSRB Secretary STARS Regulatory Affairs Mr. Jay Silberg (Pillsbury Winthrop Shaw Pittman LLP)

Mr. Dan Beck (Missouri Public Service Commission)

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