ML23352A234
| ML23352A234 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 12/18/2023 |
| From: | Vincent Gaddy NRC/RGN-IV/DORS/EB1 |
| To: | Gerfen P Pacific Gas & Electric Co |
| References | |
| IR 2024014 | |
| Download: ML23352A234 (8) | |
See also: IR 05000275/2024014
Text
December 18, 2023
Paula A. Gerfen, Senior Vice President
Generation and Chief Nuclear Officer
Pacific Gas and Electric Company
P.O. Box 56
Mail Code 104/6
Avila Beach, CA 93424
SUBJECT:
DIABLO CANYON POWER PLANT, UNITS 1 AND 2 - NOTIFICATION OF AGE-
RELATED DEGRADATION INSPECTION (05000275/2024014 AND
05000323/2024014) AND REQUEST FOR INFORMATION
Dear Paula Gerfen:
The purpose of this letter is to notify you that the U.S. Nuclear Regulatory Commission (NRC)
staff will conduct the age-related degradation baseline inspection at Diablo Canyon, beginning
on June 10, 2024. The inspection team will be led by Dustin Reinert from the NRC Region 4
Office. The team will be composed of three personnel from the NRC Region 4 Office. The
inspection will be conducted in accordance with NRC inspection procedure (IP) 71111.21N.04.
The inspection will include an onsite information gathering visit by the team lead and two weeks
of onsite inspection by the team. The schedule for the inspection is as follows:
Onsite Information Gathering Visit: March 4-7, 2024
Offsite Preparation Week: June 3-7, 2024
Onsite Inspection Weeks: June 10-14, 2024, and June 24-27, 2024
The purpose of the information gathering visit is to become familiar with the station
maintenance, surveillance, testing, inspection, and condition monitoring programs, become
familiar with plant layout, support identification of structures, systems, and components (SSCs)
that will be reviewed during the inspection, and, as necessary, obtain plant specific site access
training and badging for unescorted site access. An initial list of documents that the team will
review during the information gathering visit are listed in enclosure 1.
During the information gathering visit, the team will also discuss the following inspection support
administrative details: office space size and location; specific documents requested to be made
available to the team in their office spaces; arrangements for reactor site access (including
radiation protection training, security, safety, and fitness for duty requirements); and the
availability of knowledgeable plant staff and licensing organization personnel to serve as points
of contact during the inspection.
P. Gerfen
2
For SSCs that the inspection will review, an initial list of the documents the team will review
during the conduct of the inspection are listed in enclosure 2. (Enclosure 3 lists the team
members and their contact information.) 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 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, under 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 10 CFR 2.390 of the NRC rules and practices, a copy of this letter and its
enclosures will be available electronically for public inspection in the NRC public document
room or from the publicly available records (PARS) component of NRCs document system
(ADAMS). ADAMS is accessible from the NRC Web site.
Your cooperation and support during this inspection will be appreciated. If you have questions
concerning this inspection, or the inspection team's information or logistical needs, please
contact Dustin Reinert, the team leader, in the Region 4 Office at 817-200-1534.
Sincerely,
Vincent G. Gaddy, Chief
Engineering Branch 1
Division of Operating Reactor Safety
Signed by Gaddy, Vincent
on 12/18/23
P. Gerfen
3
Docket Nos. 05000275, 05000323
Enclosures:
1.
Documents Requested Prior to
Information Gathering Visit
2.
Documents Requested Prior to
Inspection Preparation Week
3.
Inspection Team Contact Information
cc w/ encl: Distribution via LISTSERV
X
SUNSI Review
X
Non-Sensitive
Sensitive
X
Publicly Available
Non-Publicly Available
OFFICE
SRI:DORS/EB1
BC:DORS/EB1
NAME
DReinert
VGaddy
SIGNATURE
/RA/
/RA/
DATE
12/18/2023
12/18/2023
Enclosure 1
Enclosure 1
Documents Requested Prior to Information Gathering Visit
The documents and information requested below should generally be made available to the
inspection team for the team's use both onsite and offsite during the information gathering visit.
Electronic format is the preferred media. If electronic media is made available via an internet
based remote document management system, then the remote document access must allow
inspectors to download, save, and print the documents in the NRC's regional office. Electronic
media on compact disc or paper records (hardcopy) are acceptable. At the end of the
inspection, the documents in the team's possession will 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.
Documents requested by February 23, 2023:
1) A list of 50.65 (a)(1) SSCs from the past 5 years
2) A list of maintenance rule functional failures from the past 5 years
3) The two most recent evaluations of maintenance effectiveness required per Title 10 CFR
50.65(a)(3)
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) A list of Title 10 CFR Part 21 Reports that were determined to be applicable to the site from
the past 5 years
8) List of corrective action documents associated with component failures, applicable corrective
action program trend codes, or keyword search of aging, age-related, wear, accelerated
wear, corrosion, abnormal wear, accelerated degradation, and abnormal degradation
from the past 5 years. Please include a short description of the issue in the system generated
listing.
9) A list of top 100 most risk-significant structures and components according to the site-specific
probabilistic risk assessment (PRA). If possible, designate the component as active or passive
in the risk ranking.
10) The most recent system health status for each plant system and the associated Plant Health
Committee (PHC) package if presented to the PHC and any applicable PHC procedure
documents.
Enclosure 2
11) Aging management programs and basis documents. Please also include any plant-specific
or industry operating experience reviews that have been used to update aging management
activities.
12) Any self-assessments or quality assurance assessments of the aging management
programs performed since January 1, 2021
13) Copy of the updated final safety analysis report, technical specifications, and technical
requirements manual, including applicable bases documents
14) List of systems (system numbers/designators and corresponding names)
Enclosure 3
Enclosure 2
Documents Requested Prior to Inspection Preparation Week
For the samples identified by the team lead, the documents and information requested below
should generally be made available to the inspection team for the team's use both onsite and
offsite during the inspection. Electronic format is the preferred media. If electronic media is
made available via an internet based remote document management system, then the remote
document access must allow inspectors to download, save, and print the documents in the
NRC's regional office. Electronic media on compact disc or paper records (hardcopy) are
acceptable. At the end of the inspection, the documents in the team's possession will 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.
Documents requested by May 28, 2024:
1) List of corrective action documents associated with each selected SSC for the last 5 years
2) Maintenance, surveillance, testing, inspection, and condition monitoring testing requirements,
acceptance criteria, and periodicities for the selected SSC samples
3) The bases documents associated with maintenance, surveillance, testing, inspection, and
condition monitoring testing requirements, acceptance criteria, and periodicities
4) The last two years of maintenance, surveillance, testing, inspection, and condition monitoring
testing results for the selected SSC samples. For periodicities greater than two years, provide
the last two test results.
5) Vendor manuals and self-imposed 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) PI&Ds and electrical one-line drawings
(e) Control circuit drawings
(f) Design/procurement specifications
(g) List of applicable modifications for the component
Enclosure 4
Enclosure 3
Inspection Team Contact Information
Senior Reactor Inspector
817-200-1534
Dustin.Reinert@nrc.gov
Dustin Bryen
Reactor Inspector
817-200-1078
Dustin.Bryen@nrc.gov
Senior Reactor Inspector
817-200-1469
Jonathan.Braisted@nrc.gov
Mailing Address:
U.S. NRC, Region IV
Attn: Dustin Reinert
1600 East Lamar Blvd.
Arlington, TX 76011-4511