ML24297A270

Notification of NRC Baseline Inspection and Request for Information: Inspection Report 05000455/2025002

ML24297A270
Person / Time
Site:	Byron
Issue date:	10/23/2024
From:	Magnuson E NRC/RGN-III/DORS/ERPB
To:	Rhoades D Constellation Energy Generation
References
IR 2025002
Download: ML24297A270 (1)

See also: IR 05000455/2025002

Text

David Rhoades

Senior Vice President

Constellation Energy Generation, LLC

President and Chief Nuclear Officer (CNO)

Constellation Nuclear

4300 Winfield Road

Warrenville, IL 60555

SUBJECT: BYRON STATION, UNIT 2 - NOTIFICATION OF NRC BASELINE INSPECTION

AND REQUEST FOR INFORMATION: INSPECTION REPORT

05000455/2025002

Dear David Rhoades:

On April 14, 2025, the U.S. Nuclear Regulatory Commission (NRC) will begin the Baseline

Inservice Inspection Procedure 71111.08. This onsite inspection is scheduled to be performed

April 14, 2025, through April 25, 2025.

Experience has shown that this inspection is resource intensive both for the NRC inspector and

your staff. In order to minimize the impact to your onsite resources, and to ensure a productive

inspection for both sides, we have enclosed a request for documents needed for this inspection.

These documents have been divided into two groups.

The first group identifies information necessary to ensure that the inspector is adequately

prepared. The second group identifies the information the inspector will need upon arrival at the

site. It is important that all of these documents are up to date, and complete, in order to

minimize the number of additional documents requested during the preparation and/or the

onsite portions of the inspection.

We have discussed the schedule for inspection activities with your staff and understand that our

regulatory contact for this inspection will be Gerald Armstrong of your organization. If there are

any questions about this inspection or the material requested, please contact the lead inspector

Eric Magnuson at 630-829-9798, or via email at eric.magnuson@nrc.gov.

This letter does not contain new or amended information collection requirements subject to

the Paperwork Reduction Act of 1995 (44 U.S.C. 3501 et seq.). Existing information collection

requirements were approved by the Office of Management and Budget, Control

Number 3150-0011. The NRC may not conduct or 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 Office of Management and Budget Control

Number.October 23, 2024

D. Rhoades 2

This letter and its enclosure will be made available for public inspection and copying at

http://www.nrc.gov/reading-rm/adams.html and at the NRC Public Document Room in

accordance with Title 10 of the Code of Federal Regulations, Part 2.390, Public Inspections,

Exemptions, Requests for Withholding.

Sincerely,

Eric Magnuson, Reactor Inspector

Engineering and Reactor Projects Branch

Division of Operating Reactor Safety

Docket No. 50-455

License No. NPF-66

Enclosure:

Document Request for Inservice Inspection

cc: Distribution via LISTSERV

Signed by Magnuson, Eric

on 10/23/24

D. Rhoades 3

Letter to David Rhoades from Eric Magnuson dated October 23, 2024.

SUBJECT: BYRON STATION, UNIT 2 - NOTIFICATION OF NRC BASELINE INSPECTION

AND REQUEST FOR INFORMATION: INSPECTION REPORT

05000455/2025002

DISTRIBUTION:

Robert Ruiz

RidsNrrDorlLpl3

RidsNrrPMByron Resource

RidsNrrDroIrib Resource

Jack Giessner

Mohammed Shuaibi

Diana Betancourt-Roldan

Allan Barker

David Curtis

Jonathan Feibus

R3-DORS

ADAMS Accession Number: ML24297A270

Publicly Available Non-Publicly Available SensitiveNon-Sensitive

OFFICE RIII

NAME EMagnuson:anm

DATE 10/23/2024

OFFICIAL RECORD COPY

Inspection Dates: April 14, 2025, - April 25, 2025

Inspection Procedures:Inspection Procedure 71111-08, Inservice Inspection

Lead Inspector: Eric Magnuson, DORS/ERPB

630-829-9798

A. Information for the In-Office Preparation Week

The following information (electronic copy) is requested by March 17, 2025, to facilitate

the selection of specific items that will be reviewed during the onsite inspection week.

The inspector will select specific items from the information requested below and request

a list of additional documents needed onsite to your staff. We request that the specific

items selected from the lists be available and ready for review on the first day of

inspection. The following information is applicable to the outage Unit unless otherwise

indicated. If you have any questions regarding this information, please call the inspector

as soon as possible.

For the upcoming outage, a detailed schedule (including dates, if possible) and

description of:

a. List of all Non-Destructive Examinations (NDEs) planned to be performed as part

of your American Society of Mechanical Engineers (ASME), Code Inservice

Inspection (ISI) Program (include edition and addenda of Code committed to),

and NDEs planned for other systems performed as part of a Risk-Informed ISI

Program, or other augmented inspection programs (e.g., ASME Code Case

N-770 examination of dissimilar metal welds and examinations to meet an

industry initiative). Description shall include component ASME Code Class,

component IDs, categorization (Section XI, Risk-Informed, or Augmented, etc.),

and dates/times the NDEs are scheduled to be performed.

b. Reactor pressure vessel upper head (RPVUH) examinations required by

Title 10 of the Code of Federal Regulations (CFR), Part 50.55a(g)(6)(ii)(D) and

Code Case N-729;

c. Steam generator (SG) tube inspection and repair activities for the upcoming

outage or SG secondary side examinations;1 and

d. List of Welding on Code Class 1, 2, or 3 components to be performed during the

outage;

1Note 1 - If no SG examinations are planned for this outage, please confirm when the next SG examination will occur

and no further information is required for the items identified above requesting SG related information.

Enclosure

e. List identifying NDE reports (Volumetric, Surface, and Visual), which have

identified relevant indications on ASME Code Class 1 and 2 Systems since the

beginning of the last refueling outage. For indications that were accepted as-is for

continued service, provide schedule of successive exams required by Code;

f. List of repair/replacement welds in ASME Code Class 1, 2 and 3 Systems, which

have been fabricated since the beginning of the last refueling outage;

g. List of Title 10 CFR Part 21 reports applicable to your structures, systems, or

components within the scope of ASME Code Section XI that have been identified

since the beginning of the last refueling outage;

h. List of corrective action documents related to ISI and SG issues such as piping or

SG tube degradation or damage or errors identified during piping/SG tube

examinations since the beginning of the last refueling outage;

i. List of Boric Acid Corrosion Control (BACC) program corrective action

documents identified since the beginning of the last refueling outage;

j. Copy of latest revision to the Inservice Inspection Program Plan;

k. Point of contact information (names and site numbers) for ISI/SG/BACC/Welding.

B. Onsite Information to be Provided to The Inspector on the First Onsite Date.

The following information is requested for only specific items that are

selected by the inspector from list A above:

a) A copy of ASME Section XI, Code Relief Requests applicable to the selected

items.

b) Copies of applicable NDE procedures, weld procedure specifications (WPS),

NDE procedure qualification records, WPS qualification records, NDE personnel

performance qualification records, welder performance qualification records,

BACC corrective action documents and associated screenings/evaluations, ISI

and SG related corrective action documents.

c) Copy of the ASME Section XI, Code of record for the selected items.

d) Copy of the applicable Code of Construction for repair/replacement activities on

selected items.

e)If SG ECT examination is being conducted during the outage, provide copies of

the following:

• Copy of SG history documentation given to vendors performing ET of the

SGs during the upcoming outage.1

2

• Copy of procedure containing screening criteria used for selecting tubes for

in-situ pressure testing and the procedure to be used for in-situ pressure

testing.1

• Copy of previous outage SG tube operational assessment completed

following ET of the SGs (provide this document even if no SG ET is planned

for current outage).

• Copy of most recent SG Degradation Assessment (provide this document

even if no SG ET is planned for current outage).

• Copy of most recent SG Condition Monitoring Assessments. 1

• Copy of the document describing the ET acquisition equipment to be applied

including ET probe types. Also identify the extent of planned tube

examination coverage with each probe type.

• Provide procedures with guidance/instructions for identifying and plugging

SG tubes.1

• Identify and quantify any SG tube leakage experienced during the previous

operating cycle. Also provide documentation identifying which SG was

leaking and corrective actions completed or planned for this condition.

f) If RPVUH examinations are being conducted during the outage, provide copies

of the following:

• Last performed volumetric and/or surface examination reports

• Procedures used during for examinations.

• History of past RPVUH indications

1 Note 1 - If no SG examinations are planned for this outage, please confirm when the next SG examination will occur

and no further information is required for the items identified above requesting SG-related information.

3