ML18324A612
ML18324A612 | |
Person / Time | |
---|---|
Site: | Prairie Island |
Issue date: | 11/20/2018 |
From: | Nestor Feliz-Adorno NRC/RGN-III/DRS/EB2 |
To: | Sharp S Northern States Power Company, Minnesota |
References | |
IR 2019001 | |
Download: ML18324A612 (8) | |
See also: IR 05000282/2019001
Text
November 20, 2018
Mr. Scott Sharp
Site Vice President
Prairie Island Nuclear Generating Plant
Northern States Power Company, Minnesota
1717 Wakonade Drive East
Welch, MN 55089-9642
SUBJECT: PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1 AND 2
NOTIFICATION OF AN NRC TRIENNIAL HEAT SINK PERFORMANCE
INSPECTION AND REQUEST FOR INFORMATION; INSPECTION
REPORT 05000282/2019001 AND 05000306/2019001
Dear Mr. Sharp:
On Monday, March 4, 2019, the U.S. Nuclear Regulatory Commission (NRC) will begin the
onsite portion of the Triennial Heat Sink Performance Inspection at your Prairie Island Nuclear
Generating Plant, Units 1 and 2. This inspection will be performed in accordance with NRC
baseline Inspection Procedure 71111.07.
In order to minimize the impact that the inspection has on the site and to ensure a productive
inspection, we have enclosed a request for documents needed for the inspection. The
document request 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 7, 2019.
By January 18, 2019, the lead inspector will communicate the initial selected set of
approximately 2-3 risk significant heat exchangers.
- The second group is needed to support our in-office preparation activities. This set of
documents, including the calculations associated with the selected heat exchangers,
should be available at the Regional Office no later than February 18, 2019. This
information should be separated for each selected component, especially if provided
electronically (e.g., folder with component name that includes calculations, condition
reports, maintenance history, etc.). During the in-office preparation activities, the
inspector may identify additional information needed to support the inspection.
- The last group is the needed additional information identified during our in-office
preparation activities. This information should be available onsite to the inspector on
March 4, 2019. It is also requested that corrective action documents and/or questions
developed during the inspection be provided to the inspector as the documents are
generated.
S. Sharp -2-
All requested documents are to be for the time period from the onsite inspection period back
to the documents that were provided in response to the previous Heat Sink Performance
Inspection. If no activities were accomplished in that time period, then the request applies to the
last applicable document in the previous time period. It is important that these documents be as
complete as possible, in order to minimize the number of documents requested during the
preparation week or during the onsite inspection.
The lead inspector for this inspection is Néstor J. Féliz Adorno. We understand that our
licensing contact for this inspection is Pamela Johnson of your organization. If there are any
questions about the inspection or the material requested in the enclosure, please contact the
lead inspector at 630-829-9739 or via e-mail at Nestor.Feliz-Adorno@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.
This letter and its enclosure 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, Part 2.390, Public Inspections,
Exemptions, Requests for Withholding.
Sincerely,
/RA Michael A. Jones Acting for/
Néstor J. Féliz Adorno, Senior Reactor Engineer
Engineering Branch 2
Division of Reactor Safety
Docket No. 50-282; 50-306
Enclosure:
Document Request for Triennial Heat Sink
Performance Inspection
cc: Distribution via LISTSERV
S. Sharp -3-
Letter to Scott Sharp from Néstor J. Féliz Adorno dated November 20, 2018.
SUBJECT: PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1 AND 2
NOTIFICATION OF AN NRC TRIENNIAL HEAT SINK PERFORMANCE
INSPECTION AND REQUEST FOR INFORMATION; INSPECTION
REPORT 05000282/2019001 AND 05000306/2019001
DISTRIBUTION:
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ADAMS Accession Number: ML18324A612
OFFICE RIII
NAME MJones for NFéliz
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DATE 11/20/18
OFFICIAL RECORD COPY
DOCUMENT REQUEST FOR TRIENNIAL HEAT SINK PERFORMANCE INSPECTION
Inspection Report: 05000282/2019001; 05000306/2019001
Inspection Dates: March 4, 2019, through March 8, 2019
Inspection Procedure: Inspection Procedure 71111.07, Heat Sink Performance
Lead Inspector: Néstor J. Féliz Adorno
630-829-9739
Nestor.Feliz-Adorno@nrc.gov
I. Information Requested By January 7, 2019
1. List of the Generic Letter (GL) 89-13, Service Water System Problems Affecting
Safety-Related Equipment, heat exchangers in order of risk significance.
2. Copy of heat exchanger performance trending data tracked for each GL 89-13
heat exchanger.
3. List of Corrective Action Program documents (with a short description)
associated with GL 89-13 heat exchangers, heat sinks, silting, corrosion, fouling,
or heat exchanger testing, for the previous 3 years or since the last Corrective
Action Program document list was sent to the U.S. Nuclear Regulatory
Commission for the previous heat sink performance inspection.
4. Copy of any self-assessment done on any of GL 89-13 heat exchangers.
5. Last two System Health Report(s) and maintenance rule system notebooks for all
the GL 89-13 heat exchangers.
6. List of engineering-related operator workarounds (with a short description)
associated with GL 89-13 heat exchangers. The requested documents are to be
for the time period from the onsite inspection period back to the documents that
were provided in response to the previous heat sink performance inspection.
7. List of permanent and temporary modifications (with a short description)
associated with GL 89-13 heat exchangers. The requested documents are to be
for the time period from the onsite inspection period back to the documents that
were provided in response to the previous heat sink performance inspection.
8. Provide a list of any design change (with a short description) performed on
the Ultimate Heat Sink (UHS) or safety-related service water systems. The
requested documents are to be for the time period from the onsite inspection
period back to the documents that were provided in response to the previous
heat sink performance inspection.
Enclosure
DOCUMENT REQUEST FOR TRIENNIAL HEAT SINK PERFORMANCE INSPECTION
9. Electronic copies of Updated Final Safety Analysis Report, Technical
Specifications, Technical Specifications Bases, and Technical Requirements
Manual.
II Information Requested By February 18, 2019
1. Copies of the GL 89-13 responses.
2. Copies of procedures developed to implement the recommendations of GL 89-13
(e.g., the GL 89-13 Heat Exchanger Program description).
3. Copies of the selected corrective action program documents.
4. Copies of the selected modifications, if any.
5. For the specific heat exchangers selected:
a. Copy of system description and design basis document for the heat
exchangers (as applicable).
b. Copy of the construction code, Design Specification, heat exchanger data
sheets, and vendor documents including component drawings applicable for
the heat exchangers.
c. Copy of the following calculations for each selected heat exchanger that:
i. establish the limiting design basis heat load required to be removed by
each of these heat exchangers;
ii. demonstrate the heat exchangers capacity to remove the limiting heat
load;
iii. correlate surveillance testing and/or inspection results from these heat
exchangers with design basis heat removal capability (e.g., basis for
surveillance test and/or inspection acceptance criteria);
iv. evaluate the potential for water hammer in each heat exchanger or
associated piping; and
v. evaluate excessive tube vibration in each heat exchanger.
d. 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.
e. Copies of normal, abnormal, and emergency operating procedures
associated with the selected heat exchangers.
f. Copy of the operating procedure that ensures that the maximum cooling
water system inlet temperature limit is not exceeded.
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DOCUMENT REQUEST FOR TRIENNIAL HEAT SINK PERFORMANCE INSPECTION
g. Copies of those documents that describe the methods taken to control water
chemistry in the heat exchangers.
h. Copies of the two most recent completed tests and evaluation data
confirming thermal performance for those heat exchangers which are
performance tested.
i. Documentation and procedures that identify the types, accuracy, and location
of any special instrumentation used for the two most recently completed
thermal performance tests for the heat exchangers (e.g., high accuracy
ultrasonic flow instruments or temperature instruments). Include calibration
records for the instruments used during these tests.
j. Information regarding any alarms which monitor on-line performance.
k. Copy of the periodic flow testing at or near maximum design flow. The
requested documents are to be for the time period from the onsite inspection
period back to the documents that were provided in response to the previous
heat sink performance inspection.
l. 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.
m. Copy of the document establishing the repair criteria (plugging limit) for
degraded tubes which are identified in each heat exchanger.
n. 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).
o. The cleaning and inspection maintenance schedule for each heat exchanger
for the next 5 years.
6. For the UHS and the safety-related service water system (or equivalent):
a. Copy of system description and design basis document (as applicable).
b. Copy of any operability determinations or other documentation of degradation
associated with the UHS and the safety-related service water system.
c. Copy of the document (e.g., Technical Requirements Manual, procedure) that
states the maximum cooling water system inlet temperature limit that still
allows full licensed power operation of the nuclear reactor.
d. Copy of the construction code and Design Specification.
e. Copies of normal, abnormal, and emergency operating procedures
associated with the UHS and safety-related service water systems including
procedures for loss of these systems.
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DOCUMENT REQUEST FOR TRIENNIAL HEAT SINK PERFORMANCE INSPECTION
f. Copies of corrective action documents associated with waterhammer or
hydraulic transients in the service water system since the last Heat Sink
Inspection.
g. If available, provide an electronic copy of piping and instrumentation
diagrams for the service water system, including the intake structure.
h. Provide a list of calculations (with a short description), which currently apply
to UHS and safety-related service water system.
i. Provide a list of instruments (with a short description) associated with
automatic or alarm functions for the safety-related service water system
and/or UHS.
j. Copies of calculations and surveillances that determine the UHS reservoir
capacity and heat transfer capability.
k. Copies of the documents associated with the monitoring, trending, and
remediation of silt accumulation at the service water pump bay.
l. Copies of surveillance procedures and testing results performed on the
instrumentation relied upon to determine UHS reservoir capability. The
requested documents are to be for the time period from the onsite inspection
period back to the documents that were provided in response to the previous
heat sink performance inspection.
m. Inspections and/or maintenance related to preventing macrofouling (e.g., silt,
dead mussel shells, or debris) and biotic fouling (e.g., fish, algae, grass, or
kelp). The requested documents are to be for the time period from the onsite
inspection period back to the documents that were provided in response to
the previous heat sink performance inspection.
n. Copies of documents associated with the monitoring of pump performance for
potential strong-pump vs. weak-pump interaction.
o. Copies of the last two performance tests, such as the American Society of
Mechanical Engineers in-service test, for the pumps and valves. If the
components are not performance tested, please provide documentation
verifying performance by the methods actually used.
p. Copies of the documents that demonstrate that flow balance testing was
performed during the last 3 years. If the last flow test was performed longer
than 3 years, then provide the last flow test.
q. Copies of procedures used to monitor interface valves between the
safety-related section of the service water system and the nonsafety-related
section and the associated results. The requested documents are to be for
the time period from the onsite inspection period back to the documents that
were provided in response to the previous heat sink performance inspection.
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DOCUMENT REQUEST FOR TRIENNIAL HEAT SINK PERFORMANCE INSPECTION
r. Copies of the procedures that verify the performance of risk significant
non-safety functions and the associated results. The requested documents
are to be for the time period from the onsite inspection period back to the
documents that were provided in response to the previous heat sink
performance inspection.
s. Copies of the testing, inspection, or monitoring program procedures for buried
or inaccessible piping and the associated results. The requested documents
are to be for the time period from the onsite inspection period back to the
documents that were provided in response to the previous heat sink
performance inspection.
t. History of any thru wall pipe leak on the system. The requested documents
are to be for the time period from the onsite inspection period back to the
documents that were provided in response to the previous heat sink
performance inspection.
u. Copies of the documents associated with the Periodic Inspection Program
used to detect protective coating failure, corrosion, and erosion.
v. Copies of the in-service test vibration monitoring results and operational
history for deep draft vertical pumps, if applicable. The requested documents
are to be for the time period from the onsite inspection period back to the
documents that were provided in response to the previous heat sink
performance inspection.
7. A schedule of all inspections, cleanings, maintenance, or testing of any
safety-related plant heat exchanger to be performed during the onsite portion
of the inspection.
III Information Requested to be Available on First Day of Inspection, March 4, 2019
1. During the in-office preparation activities, the team will be making final selections
and may identify additional information needed to support the inspection. The
lead inspector will provide a list of any additional information needed during the
week of February 25, 2019.
If you have questions regarding the information requested, please contact the lead inspector.
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