ML21322A295
| ML21322A295 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 11/19/2021 |
| From: | Vincent Gaddy Region 4 Engineering Branch 1 |
| To: | Reasoner C Wolf Creek |
| References | |
| IR 2021001 | |
| Download: ML21322A295 (9) | |
See also: IR 05000482/2022001
Text
November 19, 2021
Mr. Cleve Reasoner, Chief Executive Officer
and Chief Nuclear Officer
Wolf Creek Nuclear Operating Corporation
P.O. Box 411
Burlington, KS 66839
SUBJECT: WOLF CREEK GENERATING STATION - NOTIFICATION OF NRC TRIENNIAL HEAT
EXCHANGER/SINK PERFORMANCE INSPECTION (05000482/2022001 AND
REQUEST FOR INFORMATION
Dear Mr. Reasoner:
The purpose of this letter is to notify you that U.S. Nuclear Regulatory Commission (NRC) staff will
conduct the triennial portion of the heat exchanger/sink performance inspection at your Wolf Creek
Generating Station beginning on March 7, 2022. The onsite phase of the inspection will consist of two
reactor inspectors from the NRCs Region IV office for one week. The inspection will be conducted in
accordance with NRC Inspection Procedure (IP) 71111, Attachment 07, Heat Exchanger/Sink
Performance, dated October 21, 2020.
The objectives of the inspection are to verify that: 1) any potential heat exchanger deficiencies which
could mask degraded performance are identified, 2) any potential common-cause heat sink performance
problems that have the potential to increase risk are identified, and 3) the licensee has adequately
identified and resolved heat sink performance problems that could result in initiating events or affect
multiple heat exchangers in mitigating systems and thereby increase risk.
To minimize the impact the inspection has on the site and to ensure an efficient inspection, we have
enclosed a request for information needed for the inspection. It is important that these requests are
fulfilled as completely and accurately as possible to minimize any additional requests during the
preparation week or during the onsite inspection. The requests have been divided into three groups.
- The first group lists information necessary for our initial inspection scoping activities. This
information should be available to the lead inspector no later than January 17, 2022. After
reviewing the information, the lead inspector will communicate the selected 2-4 risk significant or
safety-related heat exchanger and/or heat sink samples as soon as practical. The lead inspector
will also communicate whether only a subset of the second group information requests is
required.
- The second group of information requested includes those items needed to support our in-office
preparation activities. This set of documents should be available no later than February 21, 2022.
This information should be separated for each selected component. Note that the inspectors may
identify during the preparation week additional information needed to support the inspection and
will communicate those requests as soon as practicable.
- The third group of information requested includes the additional documentation identified during
in-office preparation activities as well as other resource requests necessary to support our onsite
inspection activities. The additional information or resources should be available throughout the
week of onsite inspection activities beginning on March 7, 2022.
C. Reasoner 2
All information requested is to be from the time of the last triennial heat exchanger/sink performance
inspection until the present. If no documents addressing a request fall within that time, the request
applies to the last applicable document. If a request does not apply (or there are no responsive
documents) for any heat exchanger/heat sink sample, no response is necessary. Include all attachments,
addendums, etc. to the requests.
We have discussed the schedule for this inspection with your staff and understand that our regulatory
contact for this inspection will be Lisa Ketchum of your Licensing Organization. If there are any questions
about this inspection or the documents requested, please contact the lead inspector, Dustin Reinert by
telephone at 817-200-1534 or by e-mail at Dustin.Reinert@nrc.gov.
PAPERWORK REDUCTION ACT STATEMENT
This letter contains mandatory 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). Send comments regarding this information
collection to the Information Services Branch, Office of the Chief Information Officer, Mail Stop: T6 A10M,
U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001, or by e-mail to
Infocollects.Resource@nrc.gov, and to the Desk Officer, Office of Information and Regulatory Affairs,
NEOB-10202, (3150-0011) Office of Management and Budget, Washington, DC 20503.
PUBLIC PROTECTION NOTIFICATION
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.
This letter, its enclosure, and your response (if any) 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 2.390, Public Inspections, Exemptions,
Requests for Withholding.
Sincerely,
Vincent G. Digitally signed by Vincent G.
Gaddy
Gaddy Date: 2021.11.19 10:51:10
-06'00'
Vincent G. Gaddy, Chief
Engineering Branch 1
Division of Reactor Safety
Docket No. 05000482
License No. NPF-42
Enclosure: Triennial Heat Exchanger/Sink
Performance Inspection Request for Information
Request for Information
Cc w/ encl: Distribution via LISTSERV
SUNSI Review ADAMS: Non-Publicly Available Non-Sensitive Keyword:
By: DRR Yes No Publicly Available Sensitive NRC-002
OFFICE RI:DRS/EB1 BC:DRS/EB1
NAME DReinert VGaddy
SIGNATURE DRR VGG
DATE 11/19/2021 11/19/2021
Request for Information
Triennial Heat Exchanger/Sink Performance Inspection
Wolf Creek Generating Station
Inspection Report: 05000482/2022001
Inspection Dates: March 7-11, 2022
Inspection Procedure: IP 71111.07, Triennial Heat Exchanger/Sink Performance
Inspectors: Dustin Reinert, Reactor Inspector, Lead
Dustin Bryen, Reactor Inspector
I. Information Requested by January 17, 2022:
1. Copy of any heat exchanger/heat sink program documents including Generic Letter (GL) 89-13 programs or aging management programs (AMPs)
2. Copy of any original and/or supplemental responses to GL 89-13
3. Copy of any current requirements and/or commitments related to GL 89-13 or AMPs
4. Copy of any heat exchanger/heat sink program self-assessments, audits, etc.
5. Copy of the updated final safety analysis report, technical specifications, technical
requirements manual, preventive maintenance program, and inservice inspection
program. Include bases documents as applicable.
6. List of safety-related, risk-significant, or GL 89-13 program heat exchangers in order of
risk significance
7. List of corrective action program documents related to heat exchangers/heat sinks
II. Information Requested by February 21, 2022:
1. For the selected heat exchangers that are directly cooled by the service water (or open
water) system:
a. Documentation of performance testing (i.e., heat transfer, temperature
effectiveness, etc.) and/or monitoring methods (i.e., pressure loss, temperature
difference, etc.) such as technical reports, complete work orders, implementing
procedures, etc.
b. Documentation of as-found/as-left periodic flow testing and/or flow balancing
such as technical reports, complete work orders, implementing procedures, etc.
c. Documentation of visual inspections, non-destructive examinations (i.e., eddy-
current, ultrasonic testing, etc.), and cleanings such as technical reports,
complete work orders, implementing procedures, etc.
Enclosure
d. Documentation of biotic fouling and/or macrofouling treatment such as technical
reports, complete work orders, implementing procedures, etc.
e. Copy of the tube plugging map, tube plugging criteria, and heat exchanger
margin if based upon tube plugging
f. Copy of any relevant design basis calculations including any evaluations of the
potential for water hammer
g. Copy of the applicable system health report, design basis document, and/or
system description
h. Copy of any relevant system piping and instrumentation diagrams
i. Copy of the heat exchanger design specification, heat exchanger data sheet, and
any relevant vendor manuals
j. Copy of the heat exchanger (and motor/fan if an air-to-water heat exchanger)
preventive maintenance (PM) schedule including the frequency of those PM
activities and their bases
2. For the selected heat exchangers that are directly cooled by a closed loop cooling water
system:
a. Documentation of performance testing (i.e., heat transfer, temperature
effectiveness, etc.) and/or monitoring methods (i.e., pressure loss, temperature
difference, etc.) such as technical reports, complete work orders, implementing
procedures, etc.
b. Documentation of as-found/as-left periodic flow testing and/or flow balancing
such as technical reports, complete work orders, implementing procedures, etc.
c. Documentation of visual inspections, non-destructive examinations (i.e., visual,
eddy-current, ultrasonic testing, etc.), and cleanings such as technical reports,
complete work orders, implementing procedures, etc.
d. Copy of the tube plugging map, tube plugging criteria, and heat exchanger
margin if based upon tube plugging
e. Results from chemical treatments such as technical reports, complete work
orders, implementing procedures, etc.
f. Copy of any relevant design basis calculations including any evaluations of the
potential for water hammer
g. Copy of the applicable system health report, design basis document, and/or
system description
h. Copy of any relevant system piping and instrumentation diagrams
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i. Copy of the heat exchanger design specification, heat exchanger data sheet, and
any relevant vendor manuals
j. Copy of the heat exchanger (and motor/fan if an air-to-water heat exchanger) PM
schedule including the frequency of those PM activities and their bases
3. For the selected ultimate heat sink (UHS):
a. Forced draft cooling tower or spray pond UHS:
i. Copy of any calculations that demonstrate sufficient reservoir capacity
ii. Documentation of periodic monitoring and trending of sediment such as
technical reports, complete work orders, implementing procedures, etc.
iii. Documentation of any performance monitoring of heat transfer capability
such as technical reports, complete work orders, implementing
procedures, etc.
iv. Documentation of UHS structural integrity monitoring such as technical
reports, complete work orders, implementing procedures, etc.
b. Operation of the service water system (SWS) and UHS:
i. List of modifications to the SWS and UHS
ii. Copy of procedures for a loss of SWS or UHS
iii. Copy of the applicable system health report, design basis document,
and/or system description
iv. Documentation of biotic fouling and macrofouling treatments such as
technical reports, complete work orders, implementing procedures, etc.
v. Documentation of chemistry monitoring such as technical reports,
complete work orders, implementing procedures, etc.
vi. Copy of any evaluation of strong-pump to weak-pump interactions
c. Performance testing of the SWS and UHS:
i. Documentation of inservice testing of SWS/UHS pumps, valves, and fans
such as technical reports, complete work orders, implementing
procedures, etc.
ii. Documentation of SWS flow balance testing such as complete work
orders, implementing procedures, etc.
iii. Documentation of diagnostic testing for valves that interface with safety-
related service water and nonsafety-related or nonseismic piping systems
such as complete work orders, implementing procedures, etc.
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iv. Documentation of performance testing of risk-significant nonsafety-related
functions (or alignments) of the SWS such as complete work orders,
implementing procedures, etc.
d. Service water and/or closed cooling water system:
i. Documentation of inaccessible pipe testing, inspection (i.e., visual,
ultrasonic, etc.), and/or monitoring such as technical reports, complete
work orders, implementing procedures, etc.
ii. Copy of any evaluations of active thru wall pipe leaks
iii. Copy of any corrective action documents related to thru wall pipe leakage
including trend evaluations
iv. For closed cooling water systems, copy of any trend data on make-up to
the system
v. Documentation of protective coatings inspections such as technical
reports, complete work orders, implementing procedures, etc.
vi. For deep draft vertical pumps, documentation of diagnostic testing (or
equivalent method) such as, technical reports, complete work orders,
implementing procedures, etc.
e. Service water intake structure (SWIS):
i. Copy of the PM schedule for traveling screens and strainers the
frequency of those PM activities and their bases
ii. Copy of any corrective action documents related to traveling screens,
strainers, trash racks, etc.
iii. Copy of any SWS/UHS normal and abnormal operating procedures
iv. Documentation of SWIS inspections regarding structural integrity and
silting such as technical reports, complete work orders, implementing
procedures, etc.
v. Copy of any service water pump bay water level instrument
documentation related to setpoints and calibrations such as calculations,
complete work orders, implementing procedures, etc.
vi. Copy of any SWS/UHS water temperature instrumentation documentation
related to setpoints and calibrations such as calculations, complete work
orders, implementing procedures, etc.
vii. Copy of any evaluations of the potential for frazil ice formation
viii. For underwater weir walls, copy of any evaluations of potential of silt
introduction
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4. UHS Containment Device or Dam
a. For an above-ground UHS encapsulated by embankments, weirs or excavated
side slopes:
i. Copy of weir or embankment design documentation, specification, etc.
ii. Copy of any licensee or third-party dam inspection documentation used to
monitor the integrity or performance of the heat sink
iii. Copy of any calculations for demonstrating sufficient reservoir capacity
iv. Documentation of significant debris or sediment build-up monitoring in the
UHS such as any technical reports, complete work orders, implementing
procedures, etc.
v. Copy of any corrective action program documents related to debris,
structural integrity, seepage, settlement, rip rap, etc.
b. For underwater UHS weirs, structures, or excavations:
i. Copy of any underwater weirs, structures, or excavations design
documentation, specifications, etc.
ii. Documentation of settlement or movement related to structural integrity
and/or capacity monitoring such as technical reports, complete work
orders, implementing procedures, etc.
iii. Documentation of sediment intrusion monitoring such as technical
reports, complete work orders, implementing procedures, etc.
iv. Copy of any calculations for demonstrating sufficient capacity
v. Copy of any corrective action program documents related to settlement,
movement, structural integrity, sediment, etc.
III. Additional Requests During Inspection Activities Beginning March 7, 2022:
1. Supplemental requests identified during in-office preparation activities
2. Additional requests identified during onsite inspection activities
3. Discussions with relevant subject matter experts
4. Walkdowns of selected heat exchanger/heat sink samples
5. Corrective action program documents generated as a result of this inspection
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If the information requested above will not be available, please contact Dustin Reinert as soon
as possible.
Inspector Contact Information:
Dustin Reinert, Lead Dustin Bryen
Reactor Inspector Reactor Inspector
817-200-1534 817-200-1455
Dustin.Reinert@nrc.gov Dustin.Bryen@nrc.gov
Mailing Address:
U.S. NRC, Region IV
Attn: Dustin Reinert
1600 East Lamar Blvd.
Arlington, TX 76011-4511
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