ML25120A045
| ML25120A045 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 05/01/2025 |
| From: | Robert Ruiz NRC/RGN-III/DORS/RPB1 |
| To: | Rhoades D Constellation Energy Generation, Constellation Nuclear |
| References | |
| ML25104A008 IR 2025050 | |
| Download: ML25120A045 (1) | |
See also: IR 05000254/2025050
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:
QUAD CITIES NUCLEAR GENERATING STATION - REQUEST FOR
INFORMATION FOR SPECIAL INSPECTION: INSPECTION REPORT
Dear David Rhoades:
On May 12, 2025, the U.S. Nuclear Regulatory Commission (NRC) will be performing a special
inspection at Quad Cities. This inspection will be performed in accordance with NRC Inspection
Procedure 93812, Special Inspection.
This special inspection will focus on the inoperability of both trains of the Unit 1 to reactor building
to suppression chamber vacuum breakers due to a configuration control event occurring during the
restoration of the pressure suppression system following local leak rate testing (LLRT) during
the outage.
Experience has shown that these inspections are extremely resource intensive both for the
NRC inspectors and the utility staff. In order to minimize the impact that the inspection has on
the site and to ensure a productive inspection, we have enclosed a list of documents needed for
the inspection.
The documents requested are copies of condition reports and lists of information necessary to
ensure the inspection team is adequately prepared for the inspection. The information
requested should be ready for NRC review by May 7, 2025. Please provide the lead inspector a
copy of the information in an electronic format by that date.
The lead inspector for this inspection is Thomas Hartman. If there are any questions about the
inspection or the material requested in the enclosure, contact the lead inspector at
630-829-9884 or Thomas.Hartman@nrc.gov.
May 1, 2025
D. Rhoades
2
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.
In accordance with Title 10 of the Code of Federal Regulations (10 CFR) 2.390 Public
Inspections, Exemptions, Requests for Withholding, of the NRCs Rules of Practice, a copy of
this letter, its enclosure, and your response (if any) will be available electronically for public
inspection in the NRCs Public Document Room or from the Publicly Available Records (PARS)
component of the NRC's Agencywide Documents 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).
Sincerely,
Robert Ruiz, Chief
Reactor Projects Branch 1
Division of Operating Reactor Safety
Docket No. 05000254
License No. DPR-29
Enclosure:
Special Inspection Request for Information
cc: Distribution via LISTSERV
Signed by Ruiz, Robert
on 05/01/25
D. Rhoades
3
Letter to David Rhoades from Robert Ruiz dated May 1, 2025.
SUBJECT:
QUAD CITIES NUCLEAR GENERATING STATION - REQUEST FOR
INFORMATION FOR SPECIAL INSPECTION: INSPECTION REPORT
DISTRIBUTION:
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ADAMS Accession Number: ML25120A045
Publicly Available
Non-Publicly Available
Sensitive
Non-Sensitive
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DATE
04/30/2025
05/01/2025
OFFICIAL RECORD COPY
SPECIAL INSPECTION REQUEST FOR INFORMATION
Enclosure
Special Inspection
Request for Information
I.
ADMINISTRATIVE INSPECTION INFORMATION
Inspection Report Number:
Onsite Inspection Dates:
May 12-16, 2025
Inspection Procedure:
Inspection Procedure 93812, Special Inspection
Lead Inspector:
Thomas Hartman, Senior Project Engineer, RIII/DORS/ERPB
630-829-9884
Thomas.Hartman@nrc.gov
Teammate Inspectors:
Courtney St. Peters, Senior Project Engineer
James Beavers, Senior Resident Inspector, Davis-Besse
Jim Kepley, Operations Engineer, Region I
II. LOGISTICS
Email the following inspection logistics to the lead inspector by May 7, 2025, or sooner:
1.
Inspector room name/number, directions from the main access facility, and phone
number;
2. Interview room name and number;
3.
Response team contact information (names and phone numbers) and team roles
(e.g., management sponsor, lead, inspector counterpart);
4. Any site access/badging actions needed for each inspector;
5. Any dosimetry actions needed for each inspector;
6. Entrance meeting time (preferably around 9:00 a.m. Central Time) and location;
7. Confirmation that the team will have access to a licensee computer with a nearby printer,
including independent log-in and access;
8. Confirmation that the team will have Wi-Fi access.
9. Cafeteria location and hours;
10. Inspection response team normal working hours; and
11. Any potential resource conflicts during the inspection (e.g., emergency drills and all-staff
meetings).
SPECIAL INSPECTION REQUEST FOR INFORMATION
2
III. INFORMATION REQUEST
Contact the lead inspector as soon as possible if you have any questions regarding this
information request. Provide the information electronically in searchable formats, if
possible. The files should contain descriptive names and be indexed and hyperlinked to
facilitate ease of use. Information in lists should contain enough information to be easily
understood by someone who has knowledge of light-water reactor technology.
Please provide the information by May 7, 2025, to facilitate the selection of specific
items that will be reviewed during the onsite inspection week. Please provide the
information in an electronic format sent to the Team Lead.
The following information is requested:
1.
Provide a timeline of all activities performed on the Unit 1 reactor building to
suppression chamber vacuum breakers during the Q1R28 refueling outage,
including the use of any administrative tags to track configuration of the
components. Include the following in the timeline:
a. Identification numbers for the activities listed.
b. Date the inoperable reactor building to suppression chamber vacuum breakers
were discovered, how discovered and when restored.
c.
Dates of any human performance or other investigation immediately following
discovery of the mispositioned reactor building to suppression chamber vacuum
breakers.
d. Any determination as to what caused the configuration control issue.
Any associated corrective action documents written for the reactor building to
suppression chamber vacuum breakers during the Q1R28 refueling outage up to the
discovery and restoration of the configuration control issue.
2. Provide a drawing of the reactor building to suppression chamber vacuum breakers
with the following identified:
a. Location of affected components including positions prior to, during, and as left
after testing;
b.
Associated diagrams showing downstream impact on control room
indications and alarms from mispositioned components.
3.
Provide any Condition Reports (CRs) and associated evaluations/investigations
regarding this event include any extent of condition reviews performed or planned in
response to this event;
4. Provide copies of the administrative procedures for performing LLRTs, including sequencing
of tests, who is specifically allowed (i.e., control room supervisor, test director, etc.) to approve
deviations from the procedural steps regarding configuration of the tested components, and
how are completed tests are reviewed by the control room unit supervision. Include any
guidance regarding required actions if an LLRT is completed with equipment left in an
abnormal configuration and how such deviations are tracked.
SPECIAL INSPECTION REQUEST FOR INFORMATION
3
5.
Provide copies of outage administrative procedures associated with tracking
configuration control changes during an outage, and ensuring equipment is restored to
expected configuration prior to any mode change.
6.
Copies of administrative procedures describing the roles and responsibilities of
senior licensed operating staff assigned coordination roles during an outage.
7.
Copies of procedures documenting Codes of Conduct for operations and
maintenance staff.
8.
Copy of HU-AA-104-101, Procedure Use and Adherence; specifically, the revision
of this procedure applicable during the Q1R28 Unit 1 refueling outage.
9. Copies of operating procedures (normal, abnormal or emergency operating)
re: operation of the reactor building to suppression chamber vacuum breakers.
Include a listing of any associated, credited control room indicators/alarms and alarm
response procedures.
10. Provide the design documentation of the reactor building to suppression chamber
vacuum breakers demonstrating how they meet single-proof criteria, given that the
closure of one valve caused a complete loss of safety function. Including, but not
limited to:
a. The relevant sections in the Updated Final Safety Analysis Report (UFSAR);
b. Maintenance rule basis description including classification and monitoring
criteria;
c.
Associated Design Basis Notebook or summary for the system;
d. Copies of any related evaluations performed in response to the event.
Other:
Please ensure the inspection team room is lockable with limited keys. On the first day of the
inspection, please provide the inspection team a demonstration how to use a computer to
access your corrective action program data.
The inspectors will also request to talk to/interview plant personnel to seek information about the
issue. The lead inspector will discuss with your staff the protocol and format of the interviews,
whether impromptu or scheduled individuals or groups. For this the inspector will need access
to organization charts showing position titles and names.