ML21305B801
| ML21305B801 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 11/02/2021 |
| From: | Vincent Gaddy Region 4 Engineering Branch 1 |
| To: | Dent J Nebraska Public Power District (NPPD) |
| References | |
| IR 2021001 | |
| Download: ML21305B801 (10) | |
See also: IR 05000298/2022001
Text
November 2, 2021
Mr. John Dent, Jr., Vice President
and Chief Nuclear Officer
Nebraska Public Power District
72676 648A Avenue
Brownville, NE 68321
SUBJECT: COOPER NUCLEAR STATION - NOTIFICATION OF NRC TRIENNIAL HEAT
EXCHANGER/SINK PERFORMANCE INSPECTION 05000298/2022001 AND
REQUEST FOR INFORMATION
Dear Mr. Dent:
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 Cooper
Nuclear Station from February 7, 2022, through February 10, 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 December 27,
2021. As soon as practicable, the lead inspector will communicate the selected 2-4 risk
significant or safety-related heat exchanger and/or heat sink samples. 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
January 24, 2022. This information should be separated for each selected component.
J. Dent, Jr. 2
Note that the inspector(s) 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 February 7,
2022.
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 Mr. Thomas Forland of your Licensing Organization.
If there are any questions about this inspection or the documents requested, please contact the
lead inspector, Fabian Thomas, by telephone at 817-200-1126 or by e-mail at
Fabian.Thomas@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.
J. Dent, Jr. 3
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,
Signed by Gaddy, Vincent
on 11/02/21
Vincent G. Gaddy, Chief
Engineering Branch 1
Division of Reactor Safety
Docket No. 05000298
License No. DPR-46
Enclosure:
Request for Information
cc w/ encl: Distribution via LISTSERV
SUNSI Review ADAMS: Non-Publicly Available Non-Sensitive Keyword:
By: FDT Yes No Publicly Available Sensitive NRC-002
OFFICE DRS/EB1 DRS/EB1
NAME FThomas VGaddy
SIGNATURE /RA/ /RA/
DATE 11/2/2021 11/2/2021
Request for Information
Triennial Heat Exchanger/Sink Performance Inspection
Cooper Nuclear Station
Inspection Report: 05000298/2022001
Inspection Dates: February 7 - 11, 2022
Inspection Procedure: IP 71111.07, Triennial Heat Exchanger/Sink Performance
Lead Inspector: Fabian Thomas, Reactor Inspector, Lead
I. Information Requested by December 27, 2021:
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 (and bases),
technical requirements manual (and bases), and inservice inspection program
document.
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 January 24, 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 February 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 Fabian Thomas as soon
as possible.
Inspector Contact Information:
Fabian Thomas, Lead Wes Cullum
Reactor Inspector Reactor Inspector
817-200-1126 817-200-1563
Fabian.Thomas@nrc.gov Wes.Cullum@nrc.gov
Mailing Address:
U.S. NRC, Region IV
Attn: Fabian Thomas
1600 East Lamar Blvd.
Arlington, TX 76011-4511
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