ML20149K326
| ML20149K326 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 05/28/2020 |
| From: | Vincent Gaddy Division of Nuclear Materials Safety IV |
| To: | Gerry Powell South Texas |
| References | |
| IR 2020003 | |
| Download: ML20149K326 (6) | |
See also: IR 05000498/2020003
Text
May 28, 2020
Mr. G. T. Powell
President and CEO
STP Nuclear Operating Company
P.O. Box 289
Wadsworth, TX 77483
SUBJECT: SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION,
UNITS 1 AND 2 - NOTIFICATION OF NRC TRIENNIAL HEAT SINK
PERFORMANCE INSPECTION (05000498/2020003 AND 05000499/2020003)
AND REQUEST FOR INFORMATION
Dear Mr. Powell:
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 South Texas Project Electric
Generating Station, Units 1 and 2, from July 20-24, 2020. 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 71111, Attachment 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 13, 2020. Also,
appropriate personnel knowledgeable of heat exchangers should be available to support the
inspectors at the site during the inspection.
We have discussed the schedule for this inspection activity with your licensing staff. If there are
any questions about this inspection or the material requested, please contact the lead inspector,
Gerond George, by telephone at 817-200-1562 or by e-mail at Gerond.George@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.
G. Powell 2
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 10 CFR 2.390, Public Inspections, Exemptions, Requests for
Withholding.
Sincerely,
Vincent G. Digitally signed by Vincent
G. Gaddy
Gaddy Date: 2020.05.28 07:46:08
-05'00'
Vincent G. Gaddy, Chief
Engineering Branch 1
Division of Reactor Safety
Docket Nos. 05000498 and 05000499
License Nos. NPF-76 and NPF-80
Enclosure:
Triennial Heat Sink Performance
Inspection Request for Information
cc w/ encl: Distribution via LISTSERV
SUNSI Review ADAMS: Non-Publicly Available Non-Sensitive Keyword:
By: GAG Yes No Publicly Available Sensitive NRC-002
OFFICE RI/EB1 C:EB1
NAME GGeorge VGaddy
SIGNATURE /RA/ /RA/
DATE 5/26/20 5/27/2020
Request for Information
Triennial Heat Sink Performance Inspection
South Texas Project, Units 1 and 2
Inspection Report: 05000498/2020003 AND 05000499/2020003
Inspection Dates: July 20-24, 2020
Inspection Procedure: IP 71111.07, Heat Sink Performance, Triennial Review
Inspectors: Gerond George, Senior Reactor Inspector
Dustin Reinert, PhD., Reactor Inspector
Information Requested for the In-Office Preparation Week
The following information should be made available to the lead inspector, Gerond George, by
July 13, 2020. Please note that additional information may be requested during the onsite
portion of the inspection. It is preferable to have the information provided in electronic format;
although, the information may also be sent to the Region IV office in hard copy to the attention
the lead inspector. Also, we request that you categorize the documents in your response with
the numbered list below. If any requested documents are large and only hard copy formats are
available, please inform the inspector and provide the documentation during the first day of the
onsite inspection. Additionally, requested documents such as corrective action program
documents are to be for the time period from the current onsite inspection back to the previous
triennial heat sink performance inspection. Requested documents such as surveillances,
maintenance tasks, or thermal performance tests are to be the last three performances of those
activities. If the requested documentation does not apply to the sample selection for this
inspection, no response is necessary. If the information requested above will not be available or
if there are questions regarding this information request, please contact the lead inspector as
soon as possible.
The following heat exchangers/heat sinks have been selected for inspection:
Unit 1, Train A Essential Cooling Water Intake Structure Ventilation
Unit 1, Train B Main Steam Isolation Valve Cubicle Ventilation and Heating Subsystem:
Unit 2, Train B Residual Heat Removal Heat Exchanger
Unit 2, Train B Component Cooling Water Heat Exchanger
For all samples listed above:
1. Copies of any self-assessments or audits performed in the previous three years
2. Copies of any documents such as a Generic Letter 89-13 heat exchanger program
description, heat exchanger program document, etc.
3. List of commitments (with descriptions) to the Generic Letter 89-13 program
4. Copies of system health reports and maintenance rule system notebooks
5. Copies of design bases documents, updated final safety analysis report pages, technical
specification (and bases) pages, and technical requirements manual (and bases) pages
Enclosure
6. List of corrective action program documents (with descriptions) for the past three years
7. List of any design changes (with descriptions) implemented during the past three years
8. List of preventive maintenance tasks (with descriptions) and frequency
9. Copies of simplified piping and instrumentation drawings or diagrams and operator
training manuals, if available
For the specific heat exchangers selected:
Testing Documents
10. Copies of the two most recent completed tests confirming thermal performance for those
heat exchangers which are performance tested
11. Instrument uncertainties of the instruments used during testing
12. Copy of any operability determinations or other documentation of degradation
associated with the heat exchangers or the systems that support the operation for the
selected heat exchangers
13. Documents that show the as-found results are recorded, evaluated, and appropriately
dispositioned such that the as-left condition is acceptable
Cleaning Documents
14. The cleaning and inspection maintenance schedule for each heat exchanger for the next
five years
15. Copy of the document describing the inspection results for the last two cleaning and
inspection activities completed on each heat exchanger
16. Cleaning procedures with acceptance criteria for the selected heat exchangers
17. Copies of the documents that verify the structural integrity of the heat exchanger, e.g.,
eddy current summary sheets, ultrasonic testing results, and visual inspection results
18. Copies of those documents that describe the methods taken to control water chemistry
in the heat exchangers
Design Documents
19. Provide a list of calculations (with descriptions) which currently apply to each heat
exchanger
20. Copies of vendor data sheets and design basis data for the selected heat exchangers
21. 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
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22. 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)
23. Copy of the calculations or documents which evaluate the potential for water hammer or
excessive tube vibration in the heat exchanger or associated piping
24. Copy of the document which identifies the current number of tubes in service for each
heat exchanger and the supporting calculation which establishes the maximum number
of tubes which can be plugged in each heat exchanger
25. Copy of the document establishing the repair criteria (plugging limit) for degraded tubes
which are identified in each heat exchanger
Inspector Contact Information:
Gerond George, Lead Dustin Reinert, PhD.
Senior Reactor Inspector Reactor Inspector
817-200-1562 817-200-1534
Gerond.George@nrc.gov Dustin.Reinert@nrc.gov
Mailing Address:
U.S. NRC, Region IV
Attn: Gerond George
1600 East Lamar Blvd.
Arlington, TX 76011-4511
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