ML19158A078
ML19158A078 | |
Person / Time | |
---|---|
Site: | Wolf Creek ![]() |
Issue date: | 06/05/2019 |
From: | Vincent Gaddy Region 4 Engineering Branch 1 |
To: | Heflin A |
Gaddy V | |
References | |
IR 2019003 | |
Download: ML19158A078 (6) | |
See also: IR 05000482/2019003
Text
June 5, 2019
Adam C. Heflin, President and
Chief Executive Officer
Wolf Creek Nuclear Operating Corporation
P.O. Box 411
Burlington, KS 66839
SUBJECT:
WOLF CREEK GENERATING STATION - NOTIFICATION OF NRC TRIENNIAL
HEAT SINK PERFORMANCE INSPECTION (05000482/2019003) AND
REQUEST FOR INFORMATION
Dear Mr. Heflin:
The purpose of this letter is to notify you that U.S. Nuclear Regulatory Commission (NRC) staff
will conduct a triennial heat sink performance inspection at your Wolf Creek Generating Station
from July 29, 2019 - August 2, 2019. 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
the triennial review portion of NRC Inspection Procedure 71111.07, "Heat Sink Performance."
Experience has shown that this inspection is resource intensive both for the NRC inspectors
and your staff. In order to minimize the impact to your onsite resources and to ensure a
productive inspection, we have enclosed a request for documents needed for this inspection.
Please note that the documents are requested to be provided by July 15, 2019. We request
that during the onsite inspection week you ensure that copies of analyses, evaluations, or
documentation regarding the implementation and maintenance of your heat exchanger program
are available. Of specific interest are those documents that establish that your heat exchanger
program satisfies NRC regulatory requirements and conforms to applicable NRC guidance.
Also, appropriate personnel knowledgeable of safety-related heat exchangers should be
available to support the inspector at the site during the inspection.
We have discussed the schedule for this inspection activity with your staff and understand that
our regulatory contact for this inspection will be Jason Knust of your licensing organization. If
there are any questions about this inspection or the material requested, please contact the lead
inspector, Chad Stott, by telephone at 817-200-1526 or by e-mail at Chad.Stott@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.
A. Heflin
2
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 10 CFR 2.390, Public Inspections, Exemptions, Requests for
Withholding.
Sincerely,
/RA/
Vincent G. Gaddy, Chief
Engineering Branch 1
Division of Reactor Safety
Docket No. 50-482
License No. NPF-42
Enclosure:
Triennial Heat Sink Performance Inspection
Request for Information
cc: Electronic Distribution to Wolf Creek Generating Station
Enclosure
Request for Information
Triennial Heat Sink Performance Inspection
Wolf Creek Generating Station
Inspection Report: 05000482/2019003
Inspection Dates:
July 29 - August 2, 2019
Inspection Procedure:
IP 71111.07, Triennial Heat Sink Performance
Inspectors:
Chad Stott, Reactor Inspector
Jonathan Braisted, Reactor Inspector
Information Requested for the In-Office Preparation Week
The following information should be sent to the Region IV office in hard copy or electronic
format, to the attention of Chad Stott, by July 15, 2019. The inspector will review specific items
from the information requested below and then request from your staff additional documents
needed during the onsite inspection week. Also, we request that you categorize the documents
in your response with the numbered list below. Please provide requested documentation
electronically, if possible. If requested documents are large and only hard copy formats are
available, please inform the inspector and provide subject documentation during the first day of
the onsite inspection. If you have any questions regarding this information request, please call
the lead inspector as soon as possible.
The following heat exchangers/heat sinks have been selected for inspection:
Component Cooling Water Heat Exchanger EEG01B
Containment Air Cooler SGN01C
Control Room A/C SGK04A
General document requests, as applicable:
1. Copies of any heat exchanger program self-assessments or audits performed since the
last triennial heat sink inspection
2. Copies of any heat exchanger program documents or descriptions
3. List of commitments (with descriptions) to the Generic Letter 89-13 program
4. Copies of the updated final safety analysis report, technical specifications, and technical
requirements manual
For all heat exchangers listed above, as applicable:
5. Copies of design bases documents, system health reports, and maintenance rule
system notebooks
2
6. List of corrective action program documents (with descriptions), including any operability
determinations, since the last triennial heat sink inspection
7. List of any design changes (with descriptions) implemented since the last triennial heat
sink inspection
8. List of any surveillance activities or preventive maintenance tasks (with descriptions) and
frequency
9. Copies of simplified piping and instrumentation drawings or diagrams
10. Copies of the two most recent thermal performance tests and instrument uncertainties
used during testing
11. Copies of the two most recent documents that verify structural integrity (i.e., eddy current
summary sheets, ultrasonic testing results, and visual inspection results, etc.)
12. Copies of documents that describe the methods taken to control water chemistry
13. List of calculations (with descriptions) which currently apply to each heat exchanger
14. Copies of vendor data sheets
15. Copy of the calculation which establishes the limiting (maximum) design basis heat load
which is required to be removed by each of these heat exchangers
16. Copy of the calculation which correlates surveillance testing results from these heat
exchangers with design basis heat removal capability (e.g., basis for surveillance test
acceptance criteria)
17. Copy of the calculations or documents which evaluate the potential for water hammer or
excessive tube vibration in the heat exchanger or associated piping
18. Copy of the document which identifies the current number of tubes in service for each
heat exchanger (e.g., tube plugging map) and the supporting calculation which
establishes the maximum number of tubes which can be plugged in each heat
exchanger
19. Copy of the document establishing the repair criteria for degraded tubes
For the ultimate heat sink, as applicable:
20. List of corrective action program documents (with descriptions), including any operability
determinations, since the last triennial heat sink inspection
21. Dam inspections that monitor the integrity of the ultimate heat sink
22. Copies of calculations and surveillances that determine the ultimate heat sink reservoir
capacity and heat transfer capability
3
23. Copies of procedures for a loss of ultimate heat sink or safety-related service water
system
24. Copies of the most recent inspections and/or maintenance related to macrofouling (silt,
mussel shells, debris, etc.) and aquatic life
25. Copies of the most recent inspections and/or maintenance related to preventing biotic
fouling
26. Copies of procedures and most recent test results to survey or monitor interface valves
between the safety-related section of the service water system and the non-safety
related section
27. Copy of the most recent safety-related service water flow balance test results, both as-
found and as-left
28. History of any thru-wall pipe leaks on the safety-related service water system
29. List of corrective action program documents (with descriptions), including any operability
determinations, since the last triennial heat sink inspection
Inspector Contact Information:
Reactor Inspector
Reactor Inspector
817-200-1526
817-200-1469
Chad.Stott@nrc.gov
Jonathan.Braisted@nrc.gov
Mailing Address:
U.S. NRC, Region IV
Attn: Chad Stott
1600 East Lamar Blvd.
Arlington, TX 76011-4511
SUNSI Review: ADAMS: Non-Publicly Available Non-Sensitive Keyword: NRC-002
By: CAS Yes No
Publicly Available Sensitive
OFFICE
RI:EB1
RI:EB1
C:EB1
NAME
CStott
JBraisted
VGaddy
SIGNATURE
/RA/
/RA/
/RA/
DATE
5/23/2019
5/22/2019
6/5/2019