ML22165A235
| ML22165A235 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 06/14/2022 |
| From: | Mel Gray NRC/RGN-I/DORS |
| To: | Rhoades D Constellation Energy Generation, Constellation Nuclear |
| Gray M | |
| References | |
| IR 2022012 | |
| Download: ML22165A235 (7) | |
See also: IR 05000244/2022012
Text
June 14, 2022
Mr. David P. Rhoades
Senior Vice President
Constellation Energy Generation, LLC
President and Chief Nuclear Officer (CNO)
Constellation Nuclear
4300 Winfield Road
Warrenville, IL 60555
SUBJECT: R.E. GINNA NUCLEAR POWER PLANT, LLC - REQUEST FOR
INFORMATION FOR A TRIENNIAL BASELINE DESIGN BASES ASSURANCE
INSPECTION (TEAM); INSPECTION REPORT 05000244/2022012
Dear Mr. Rhoades:
The purpose of this letter is to notify you that the U.S. Nuclear Regulatory Commission (NRC)
Region I staff will conduct a Design Bases Assurance Inspection (DBAI) at your R.E. Ginna
Nuclear Power Plant. Niklas Floyd, a Senior Reactor Inspector from the NRCs Region I office,
will lead the inspection team. The inspection will be conducted in accordance with Inspection
Procedure 71111.21M, Design Bases Assurance Inspection (Team), dated December 8, 2016
(ADAMS Accession No. ML16340B000).
The inspection will evaluate the capability of risk-significant/low-margin components to function
as designed to support proper system operation. The inspection will also include a review of
selected modifications, operating experience, and as applicable, operator actions.
During a telephone conversation on June 2, 2022, with Christopher Bradshaw and other
members of your staff, we confirmed arrangements for an information-gathering site visit and
the two-week onsite inspection. The schedule is as follows:
- Information-gathering visit: July 11-12, 2022
- Onsite weeks: Weeks of November 14 and November 28, 2022
The purpose of the information-gathering visit is to meet with members of your staff to identify
risk-significant components, modifications, operator actions, and operating experience items.
Information and documentation needed to support the inspection will also be identified.
Frank Arner, a Region I Senior Risk Analyst, will support Niklas Floyd during the information-
gathering visit to review probabilistic risk assessment data and identify components to be
examined during the inspection.
Experience with previous baseline design/modification inspections of similar depth and length
has shown this type of inspection is resource intensive, both for the NRC inspectors and the
licensee staff. In order to minimize the inspection impact on the site and to ensure a productive
inspection for both parties, we have enclosed a request for information needed for the
inspection.
D. Rhoades 2
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. Insofar as possible, this information should be provided electronically to the lead
inspector. The information request has been divided into two groups:
- The first group lists information necessary for our information gathering visit. This
information should be provided to the lead inspector by July 7, 2022.
- The second group lists information necessary for our initial inspection scoping activities.
This information should be provided to the lead inspector by August 19, 2022.
By October 3, 2022, the lead inspector will communicate the initial selected set of
components and modifications
- The third group of documents requested is those items needed to support our in-office
preparation activities. This set of documents, specific to the selected components and
modifications, should be provided to the lead inspector at the Regional Office no later
than November 1, 2022. During the in-office preparation activities, the team may identify
additional information needed to support the inspection, and those items will be
communicated directly to Constellation staff.
If there are any questions about the inspection or the material requested in the enclosure,
please contact the lead inspector at 610-337-5282 or via e-mail at Niklas.Floyd@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.
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,
Digitally signed by Melvin K.
Melvin K. Gray GrayDate: 2022.06.14 14:18:16
-04'00'
Mel Gray, Chief
Engineering Branch 1
Division of Operating Reactor Safety
Docket No. 50-244
License No. DPR-18
Enclosure:
Document Request for Design Bases
Assurance Inspection
cc: Distribution via ListServ
x Non-Sensitive x Publicly Available
x SUNSI Review
Sensitive Non-Publicly Available
OFFICE RI/DORS RI/DORS
NAME NFloyd MGray
DATE 6/13/22 6/13/22
DOCUMENT REQUEST FOR DESIGN BASES ASSURANCE INSPECTION
Inspection Report: 05000244/2022012
Onsite Inspection Dates: November 14, through November 18, 2022; and
November 28, through December 2, 2022
Inspection Procedure: Inspection Procedure 71111.21M, Design Bases Assurance
Inspection (Team)
Lead Inspector: Niklas Floyd, Senior Reactor Inspector
610-337-5282
Niklas.Floyd@nrc.gov
I. Information Requested for the Information Gathering Visit (bagman trip)
The following information is requested by July 7, 2022, to facilitate initial inspection planning.
Feel free to contact the lead inspector as soon as possible if you have any questions
regarding this information request. Please provide the information electronically in pdf files,
Excel, or other searchable formats, preferably on some portable electronic media (e.g., CD-
ROM, DVD, internet). 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.
1. The site probabilistic risk analysis (PRA) System Notebook and latest PRA Summary
Document.
2. Risk ranking of top 250 basic events sorted by Risk Achievement Worth (>/= 1.3).
Include values for Risk Reduction Worth, Birnbaum Importance, and Fussel-Vesely (as
applicable). Please provide in an excel spreadsheet or other sortable format, and
include an understandable definition of the coded basic events.
3. Risk-ranking of top 100 components from site specific PRA sorted by Large Early
Release Frequency. Provide any basic event mapping used to develop the ranking of
components.
4. List of the top 200 cut-sets from your PRA. Provide the descriptions of the basic events
in the list of cut-sets.
5. List of the top 200 cut-sets for each initiator modeled in the PRA that contributes more
than 5 percent to the baseline plant core damage frequency.
6. If you have an Internal Flooding, External Events or Fire PRA Model, provide the
information requested in Items 1 and 2 for these models. Provide narrative description
of each coded event, including fire and flood zone description.
7. List of time-critical and/or risk significant operator actions.
8. List of emergency and abnormal operating procedures.
Enclosure
DOCUMENT REQUEST FOR DESIGN BASES ASSURANCE INSPECTION
9. If available, any pre-existing evaluation or list of components and associated
calculations with low design margins (e.g., pumps closest to the design limit for flow or
pressure, diesel generator close to design required output, heat exchangers close to
rated design heat removal).
II. Information Requested for Selection of Components and Modifications
The following information is requested by August 19, 2022, to facilitate inspection scoping.
Please follow the guidance for group I when providing documents.
1. If applicable, copy of any self-assessments and/or Quality Assurance assessments of
low margin structures, systems and components (SSC), completed in the last 3 years.
2. List of available design margins in both the open and closed direction for valves in the
motor-operated valve and air-operated valve programs. Identify the safety-related
direction and the basis for how the margin was determined.
3. The age and capacity of the safety-related DC batteries.
4. The In-Service Testing Program (IST) Basis document identifying the in-scope valves
and pumps, and the associated IST Program requirements for each component (e.g.,
IST valve table identifying category, active/passive function).
5. SSCs in the Maintenance Rule (a)(1) category in the last 3 years.
6. List of Root Cause Evaluations associated with SSCs failures or design issues
initiated/completed in the last 4 years.
7. List of formal operability evaluations in the last 4 years.
8. List of current operator work arounds/burdens.
9. List of permanent plant modifications to SSCs that are field work complete in the last 3
years. For the purpose of this inspection, permanent plant modifications include
permanent: plant changes, design changes, set point changes, equivalency
evaluations, suitability analyses, and commercial grade dedications. The list should
contain the number of each document, title (sufficient to understand the purpose of the
modification), revision/date, and the affected system.
10. List of calculation changes that have been issued for use in the last 3 years.
11. Corrective Action Program Procedure.
12. Procedures addressing the following: modifications, design changes, set point changes,
equivalency evaluations or suitability analyses, commercial grade dedications, and
post-modification testing.
13. List of corrective action documents (open and closed) in the last 3 years that address
permanent plant modifications issues, concerns, or processes.
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DOCUMENT REQUEST FOR DESIGN BASES ASSURANCE INSPECTION
14. Any internal/external self-assessments and associated corrective action documents
generated in preparation for this inspection.
15. Corrective Action Program documents (e.g., condition reports) associated with
inspection findings from the previous NRC Inspection Procedure 71111.21 (or
Inspection Procedure 71111.21, Attachment M inspection).
16. Updated Final Safety Analysis Report, Technical Specifications, Technical
Specifications Bases, and Technical Requirements Manual.
17. Major one line safety-related electrical drawings (AC and DC), and Piping and
Instrumentation Drawings of emergency core cooling systems, ultimate heat sink, and
III. Information Requested to Be Available by November 1, 2022
This information should be separated for each selected component and modification,
especially if provided electronically (e.g., a folder for each component and modification
named after the component or modification that includes the information requested below).
Items 1 through 9 are associated with the selected components and Item 10 is for the
selected modifications. Please follow the guidance for group I when providing documents.
1. List of corrective action documents associated with each selected component for the
last 4 years.
2. Maintenance history (e.g., corrective, preventive, and elective) associated with each
selected component for the last 6 years. Identify frequency of preventive maintenance
activities.
3. Aging Management Program documents applicable to each selected component.
4. List of calculations associated with each selected component, excluding data files. Pipe
stress calculations are excluded from this request.
5. System Health Report (last completed) and Design Basis Document associated with
each selected component.
6. List of open temporary modifications associated with each selected component, if
applicable.
7. Trend data/graphs on the selected components performance for the last 3 years (e.g.,
pump performance including IST, other vibration monitoring, oil sample results).
8. List of normal operating and alarm response procedures associated with each selected
component.
9. Last completed tests and surveillances for each selected component performed during
the last 3 years. For those tests and surveillances performed at a periodicity of greater
than three years, provide the latest test performed.
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DOCUMENT REQUEST FOR DESIGN BASES ASSURANCE INSPECTION
10. For each selected modification, copies of associated documents such as modification
package, engineering changes, 50.59 screening or evaluation, relevant calculations,
post-modification test packages, associated corrective action documents, design
drawings, and new/revised preventive maintenance requirements.
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