ULNRC-06689, Response to Request for Additional Information Regarding License Amendment Request to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems and Components for Nuclear Power Reactors

Response to Request for Additional Information Regarding License Amendment Request to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems and Components for Nuclear Power Reactors

ML21286A681
Person / Time
Site:	Callaway
Issue date:	10/13/2021
From:	Mclachlan M Ameren Missouri, Union Electric Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
Shared Package
ML21286A680	List: ML21286A682 ULNRC-06689, Response to Request for Additional Information Regarding License Amendment Request to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems and Components for Nuclear Power Reactors
References
ULNRC-06689
Download: ML21286A681 (4)

Text

i/Afflerefl Callaway Plant MISSOURI October 13, 2021 ULNRC-06689 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-000 1 10 CFR 50.90 10 CFR 50.69 Ladies and Gentlemen:

DOCKET NUMBER 50-483 CALLAWAY PLANT UNIT NO. 1 UNION ELECTRIC CO.

RENEWED FACILITY OPERATING LICENSE NPF-30 RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION REGARDING LICENSE AMENDMENT REQUEST TO ADOPT 10 CFR 50.69, RISK-INFORMED CATEGORIZATION AND TREATMENT OF STRUCTURES, SYSTEMS AND COMPONENTS FOR NUCLEAR POWER REACTORS

References:

1. Ameren Missouri letter ULNRC-06550, Application to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems and Components for Nuclear Power Reactors, dated October 30, 2020 (ML20304A454)

2. NRC letter to Ameren Missouri, Callaway Plant, Unit No. 1 Audit Plan and Setup of Online Reference Portal for License Amendment Request to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems and Components for Nuclear Power Reactors, dated February 18, 2021 (ML21039A222)

3. NRC letter to Ameren Missouri, Audit Questions for License Amendment Request to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems and Components for Nuclear Power Reactors, dated April 27, 2021 (ML2 1 1 1OA 123)

4. NRC letter to Ameren Missouri, Callaway Plant, Unit No. 1 Audit Summary for License Amendment Request to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems and Components for Nuclear Power Reactors, dated June 9, 2021 (ML21139A022)

5. Ameren Missouri letter ULNRC-06678, Supplemental Information for Application to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems and Components for Nuclear Power Reactors dated July 29, 202 1 (ML21210A025)

6. NRC letter to Ameren Missouri, Request for Additional Information Callaway Plant, Unit 1 License Amendment Request to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems and Components for Nuclear Power Reactors, transmitted September 14, 202 1 (ML21258A038) 8315 County Road 459 Steedman, MO 65077 AmerenMissouri.com

ULNRC-06689 October 13, 2021 Page 2 of 4 On October 30, 2020, Ameren Missouri submitted a license amendment request (LAR) to the NRC to adopt the provisions of 1 0 CFR 50.69, per Reference 1 above. As part of the NRC staffs review of the LAR, an audit was remotely conducted by NRC staff personnel in April 2021 In support of the audit, an audit plan and a set of audit questions were provided via the NRC letters identified as References 2 and 3 above, respectively. Following the audit, an audit summary was issued by the NRC per Reference 4 above. The summary included revised audit questions based on the Reference 3 letter and on interactions between NRC and Ameren Missouri personnel during the audit. In response to the Reference 4 letter, and as a supplement to the LAR, Ameren Missouri provided its written responses to the finalized audit questions per the letter identified as Reference 5.

Since Ameren Missouris submittal of the Reference 5 letter, NRC staff personnel have had time to review the responses, and from that review, a request for additional information (RAI) with an additional set of questions/requests was prepared and electronically transmitted to Ameren Missouri on September 14, 2021 as identified per Reference 6 above. In the Reference 6 letter, a response to the RAI was requested to be submitted within 3 0 calendar days of receipt of the c-mailed letter, thus making the response due on or by October 1 4, 202 1 This letter hereby transmits Ameren Missouris responses to the RAI questions/requests. Specifically, each question/request from the RAI and the associated Ameren Missouri response to each questionlrequest is provided in the enclosure to this letter.

It should be noted that the additional information provided in the enclosure to this letter has no impact on the No Significant Hazards Consideration conclusions reached in the LAR, nor does it change the conclusion regarding no need for an environmental assessment based on the categorical exclusion provisions of 10 CFR 51.22.

In accordance with 10 CFR 50.91 Notice for public comment; State consultation, Section (b)(l), a copy ofthis supplement to the Reference 1 LAR is being provided to the designated Missouri State official.

This EAR supplement was reviewed by the Callaway Plant Onsite Review Committee.

For any questions regarding this submittal, please contact Tom Elwood (Supervisor, Regulatory Affairs Licensing) at (314) 225-1905.

I declare under penalty of perjury that the foregoing is true and correct.

Sincerely, 722L %i Mark McLachlan Senior Director, Nuclear Plant Support Executed on: (3,

Enclosure:

Ameren Missouri Response to NRC RAIs

ULNRC-06689 October 13, 2021 Page 3 of 4 cc: Mr. Scott A. Morris 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. Mahesh Chawla Project Manager, Callaway Plant Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Mail Stop 081A Washington, DC 20555-0001

ULNRCO6629 October 13, 2021 Page 4 of 4 Index and send hardcopy to QA File A160.0761 Hardcopy:

Certrec Corporation 6500 West Freeway, Suite 400 Fort Worth, 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 Tech Spec ULNRC Distribution:

F. M. Diya B. L Cox F. J. Bianco S. P. Banker B. L. Jungmann K. A. Mills S. G. Kovaleski S. J. Meyer T. B. Elwood J. W. Hiller NSRB Secretary STARS Regulatory Affairs Mr. Jay Silberg (Pillsbury Winthrop Shaw Pittman LLP)

Mr. Dan Beck (Missouri Public Service Commission)

Ms. Katie Jo Wheeler (DNR)