ML25357A219
| ML25357A219 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 12/29/2025 |
| From: | Thomas Briley NRC/RGN-III/DORS/EB1 |
| To: | Mudrick C Constellation Energy Generation, Constellation Nuclear |
| References | |
| IR 2026010 | |
| Download: ML25357A219 (0) | |
See also: IR 05000461/2026010
Text
Christopher H. Mudrick
Senior Vice President
Constellation Energy Generation, LLC
President and Chief Nuclear Officer (CNO)
Constellation Nuclear
200 Energy Way, KSA-3N
Kennett Square, PA 19348
SUBJECT:
CLINTON POWER STATION - REQUEST FOR INFORMATION FOR THE NRC
AGE-RELATED DEGRADATION INSPECTION: INSPECTION REPORT
Dear Christopher Mudrick:
The purpose of this letter is to request information to support our scheduled age-related
degradation inspection beginning March 2, 2026, at Clinton Power Station. This inspection will
be performed in accordance with NRC baseline inspection procedure 71111.21N.04
Age-Related Degradation.
An initial list of documents requested to support identification of structures, systems, and
components (SSCs) that will be reviewed during the inspection is provided in Enclosure 1.
For SSCs that the inspection team plans to review, an initial list of the documents the team
plans to review during the conduct of the inspection is listed in Enclosure 2. The team leader
will contact you with identified SSCs. Also, personnel should be available at the site during the
inspection who are knowledgeable regarding maintenance, surveillance, testing, inspection,
and condition monitoring programs.
This letter contains voluntary information collections that are subject to the Paperwork
Reduction Act of 1995 (44 U.S.C. 3501 et seq.). The Office of Management and Budget (OMB)
approved these information collections (approval number 3150-0011). The burden to the public
for these information collections is estimated to average 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> per response. Send
comments regarding this information collection to the FOIA, Library and Information Collection
Branch, Office of the Chief Information Officer, Mail Stop: T6-A10M, U.S. Nuclear Regulatory
Commission, Washington, DC 20555-0001, or by email to Infocollects.Resource@nrc.gov,
and to the Desk Officer, Office of Information and Regulatory Affairs, NEOB-10202, (3150-0011)
OMB, Washington, DC 20503.
December 29, 2025
C. Mudrick
2
The NRC may not conduct nor sponsor, and a person is not required to respond to, a request
for information or an information collection requirement unless the requesting document
displays a currently valid OMB control number.
In accordance with Title 10 of the Code of Federal Regulations (CFR) 2.390, Public
Inspections, Exemptions, Requests for Withholding, of the NRCs Rules of Practice, a copy
of this letter, its enclosures, and your response (if any) will be available electronically for public
inspection in the NRCs Public Document Room or from the Publicly Available Records System
(PARS) component of NRCs Agencywide Document Access and Management System
(ADAMS). ADAMS is accessible from the NRC website at http://www.nrc.gov/reading-
rm/adams.html (the Public Electronic Reading Room).
If there are any questions about the material requested, or the inspection in general, please
contact me at 630-829-9595 or Thomas.Briley@nrc.gov.
Sincerely,
Senior Reactor Inspector
Engineering Branch 1
Division of Operating Reactor Safety
Docket No. 05000461
License No. NPF-62
Enclosures:
1. Requested Information to Support
Age-Related Degradation Sample
Selection
2. Requested Information to Support
Age-Related Degradation Inspection
cc: Distribution via LISTSERV
Signed by Briley, Thomas
on 12/29/25
C. Mudrick
3
Letter to Christopher Mudrick from Thomas Briley dated December 29, 2025.
SUBJECT:
CLINTON POWER STATION - REQUEST FOR INFORMATION FOR THE NRC
AGE-RELATED DEGRADATION INSPECTION: INSPECTION REPORT
DISTRIBUTION:
RidsNrrDorlLpl3
RidsNrrPMClinton Resource
RidsNrrDroIrib Resource
R3-DORS
ADAMS Accession Number: ML25357A219
SUNSI Review
Non-Sensitive
Sensitive
Publicly Available
Non-Publicly Available
OFFICE
RIII
NAME
TBriley:sw
DATE
12/29/2025
OFFICIAL RECORD COPY
Enclosure 1
Enclosure 1 - Requested Information to Support Age-Related Degradation Sample
Selection
The documents and information requested below should generally be made electronically
available to the inspection team for the teams use both on-site and off-site. At the end of the
inspection, the documents in the teams possession should not be retained.
This document request is based on typical documents that a generic plant might have. As such,
this document request is not meant to imply that any specific plant is required to have all the
listed documents. In addition, your plant-specific document titles may vary from the document
titles listed below.
The following information is requested by January 30, 2026, or sooner, to facilitate the sample
selections.
Documents requested, if applicable:
1.
List of 10 CFR 50.65(a)(1) SSCs from the past 5 years
2.
List of maintenance rule functional failures (including preventable) from the past
5 years
3.
Most recent evaluation of maintenance effectiveness required per
4.
Maintenance rule scoping and performance criteria document
5.
List of preventative maintenance deferrals and preventative maintenance change
requests in the last 5 years
6.
Equipment reliability characterization and preventative maintenance program
procedures
7.
List of 10 CFR Part 21 Reports applicable to the site from the past 5 years
8.
Site-specific corrective actions associated with component failures, or tagged with
aging, age-related, wear, accelerated wear, abnormal wear, accelerated
degradation, abnormal degradation, corrosion, degradation, etc.
9.
List of technical specification operability determinations from the past 5 years
10.
List of risk-significant long-lived passive SSCs (for licensees in the period of
extended operation (PEO))
11.
Aging management programs (AMPs) and any plant-specific or industry operating
experience reviews that have been used to update aging management activities
(for licensees in the period of extended operation)
12.
List of top 100 most risk-significant structures and components. If possible,
designate the component as active or passive in the risk ranking
13.
List of RISC-1, RISC-2, and RISC-3 SSCs (for licensees that implement
14.
Safety significant functions identified during the RISC categorization process,
and alternative treatment requirements (for licensees that implement 10 CFR 50.69)
15.
Last feedback and process adjustment required per 10 CFR 50.69(e)(1)
(for licensees that implement 10 CFR 50.69)
16.
Site-specific probabilistic risk assessment (PRA) identifying risk-significant functions
17.
List of systems (system numbers/designators and corresponding names)
Enclosure 2
Enclosure 2 - Requested Information to Support Age-Related Degradation Inspection
The team lead will identify samples (i.e., structures and components) after receipt of information
requested in Enclosure 1. The documents and information requested below should generally be
made electronically available to the inspection team for the teams use both on-site and off-site.
At the end of the inspection, the documents in the teams possession should not be retained.
This document request is based on typical documents that a generic plant might have.
As such, this document request is not meant to imply that any specific plant is required to
have all the listed documents. In addition, your plant-specific document titles may vary from
the document titles listed below. We also request that the information provided be sorted by
the list below for each sample.
The following information is requested by February 20, 2026, or sooner, to facilitate the
inspection.
1.
List of corrective action documents for the last 10 years
2.
Maintenance, surveillance, testing, inspection, and condition monitoring testing
requirements, acceptance criteria, and periodicities
3.
Bases documents associated with maintenance, surveillance, testing, inspection,
and condition monitoring testing requirements, acceptance criteria, and periodicities
4.
Last 2 years of maintenance, surveillance, testing, inspection, and condition monitoring
testing results; for periodicities greater than 2 years, the last two test results
5.
Self-imposed and vendor recommendations
6.
If available:
a)
Equipment reliability category/characterization (e.g., non-critical,
run-to-maintenance, etc.)
b)
Preventative maintenance templates for the maintenance strategy
c)
System design-basis documents and the specific updated final safety analysis
report section that describes the function
d)
Piping and instrumentation drawings (P&IDs) and electrical one-line drawings
e)
Control circuit drawings
f)
Design/procurement specifications
g)
List of applicable modifications for the component
If you have questions regarding the information requested, please contact the lead inspector.