ML16041A048
| ML16041A048 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 02/09/2016 |
| From: | Dave Hills NRC/RGN-III/DRS/EB1 |
| To: | Gardner P Northern States Power Co |
| References | |
| IR 2016002 | |
| Download: ML16041A048 (8) | |
See also: IR 05000263/2016002
Text
UNITED STATES
NUCLEAR REGULATORY COMMISSION
REGION III
2443 WARRENVILLE RD. SUITE 210
LISLE, IL 60532-4352
February 9, 2016
Mr. Peter A. Gardner
Site Vice President
Monticello Nuclear Generating Plant
Northern States Power Company, Minnesota
2807 West County Road 75
Monticello, MN 55362-9637
SUBJECT: MONTICELLO NUCLEAR GENERATING PLANT - NOTIFICATION OF AN NRC
TRIENNIAL HEAT SINK PERFORMANCE INSPECTION AND REQUEST FOR
INFORMATION; INSPECTION REPORT 05000263/2016002
Dear Mr. Gardner:
On April 18, 2016, the U.S. Nuclear Regulatory Commission (NRC) will begin the onsite
portion of the Triennial Heat Sink Performance Inspection at your Monticello Nuclear
Generating Plant. 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
documents 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 March 14, 2016.
By March 18, 2016, the 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 April 6, 2016. 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 includes the additional information above as well as plant specific
reference material. This information should be available onsite to the inspector on
April 18, 2016. 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.
P. Gardner -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 Mr. Lionel Rodriguez. We understand that our licensing
contact for this inspection is Mr. Stephen E. Sollom 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) 829-9609 or via e-mail at Lionel.Rodriguez@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.
In accordance with Title 10 of the Code of Federal Regulations (10 CFR) 2.390, Public
Inspections, Exemptions, Requests for Withholding, of the NRC's "Rules of Practice," a copy
of this letter, its enclosure, and your response (if any) will be available electronically for public
inspection in the NRCs Public Document Room or from the Publicly Available Records (PARS)
component of the NRC's Agencywide Documents Access and Management System (ADAMS).
ADAMS is accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html
(the Public Electronic Reading Room).
Sincerely,
/RA/
David E. Hills, Acting Chief
Engineering Branch 2
Division of Reactor Safety
Docket No. 50-263
License No. DPR-22
Enclosure:
Triennial Heat Sink Performance
Inspection Document Request
cc: Distribution via LISTSERV
REQUEST FOR INFORMATION - HEAT SINK PERFORMANCE
Inspection Report: 05000263/2016002
Inspection Dates: April 18 - 22, 2016
Inspection Procedure: IP 71111.07, Heat Sink Performance
Lead Inspector: Lionel Rodriguez
(630) 829-9609
Lionel.Rodriguez@nrc.gov
I. Information Requested By March 14, 2016
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 (CAP) 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 CAP document
list was sent to the NRC 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 implemented in the last 3 years.
7. List of permanent and temporary modifications (with a short description) associated
with GL 89-13 heat exchangers implemented in the last 3 years.
II. Information Requested By April 6, 2016
1. Copies of the GL 89-13 responses.
2. Copy of the Updated Final Safety Analysis Report (UFSAR) section applicable to
the GL 89-13 Heat Exchanger Program.
3. Copies of procedures developed to implement the recommendations of GL 89-13
(e.g. the GL 89-13 Heat Exchanger Program description).
4. Copies of the selected CAP documents.
5. For the specific heat exchangers selected:
a. Copies of the UFSAR sections applicable for each heat exchanger.
Enclosure
REQUEST FOR INFORMATION - HEAT SINK PERFORMANCE
b. Copy of system description and design basis document for the heat exchangers
(as applicable).
c. Provide a list of calculations (with a short description) which currently apply to
each heat exchanger:
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. Copy of the construction code, Design Specification, heat exchanger data
sheets, and vendor documents including component drawings applicable for
the heat exchangers.
f. Copies of normal, abnormal, and emergency operating procedures associated
with the selected heat exchangers.
6. For the ultimate heat sink (UHS) and the safety-related service water system
(or equivalent):
a. Copies of the applicable UFSAR sections.
b. Copy of system description and design basis document (as applicable).
c. Copy of any operability determinations or other documentation of degradation
associated with the UHS and the safety-related service water system.
d. Copy of the document (e.g. UFSAR or Technical Requirements Manual) that
states the maximum cooling water system inlet temperature limit that still allows
full licensed power operation of the nuclear reactor.
e. Copy of system description and design basis document (as applicable).
f. Copy of the construction code and Design Specification.
g. 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.
2
REQUEST FOR INFORMATION - HEAT SINK PERFORMANCE
h. Copies of corrective action documents associated with waterhammer or hydraulic
transients in the service water system since the last Heat Sink Inspection.
i. If available, provide an electronic copy of piping and instrumentation diagrams
for the service water system, including the intake structure.
j. Provide a list of calculations (with a short description), which currently apply to
UHS and safety-related service water system.
k. 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.
l. Provide a list of any design change (with a short description) performed on the
UHS or safety-related service water system since the last 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, April 18, 2016
1. For the specific heat exchangers selected.
a. 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).
b. Copies of the two most recent completed tests and evaluation data confirming
thermal performance for those heat exchangers which are performance tested.
c. 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.
d. Information regarding any alarms which monitor on-line performance.
e. Copy of the document describing the inspection results of each heat exchanger.
f. The cleaning and inspection maintenance schedule for each heat exchanger for
the next 5 years.
g. Copy of the design specification and heat exchanger data sheets for each heat
exchanger.
h. Copy of the vendor manuals including component drawings for each heat
exchanger.
i. 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.
3
REQUEST FOR INFORMATION - HEAT SINK PERFORMANCE
j. Copy of the operating procedure that ensures that the maximum cooling water
system inlet temperature limit is not exceeded.
k. Copy of the calculations or documents which evaluate the potential for water
hammer in each heat exchanger or associated piping.
l. Copy of the calculations that evaluate excessive tube vibration in each heat
exchanger and the documents that describe the controls that prevent heat
exchanger degradation due to excessive flow induced vibration during operation.
m. Copy of the periodic flow testing at or near maximum design flow.
n. 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.
o. Copy of the document establishing the repair criteria (plugging limit) for degraded
tubes which are identified in each heat exchanger.
p. 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).
q. Copies of those documents that describe the methods taken to control water
chemistry in the heat exchangers.
2. For the review of the operation of the safety-related service water system and
the UHS:
a. Copies of any design change performed on the UHS in the last 3 years.
b. Copies of any design change performed on the safety-related service water
system in the last 3 years.
c. Copies of procedures for a loss of UHS.
d. Copies of procedures for a loss of service water system.
e. The last two 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).
f. Copies of documents associated with the monitoring of pump performance for
potential strong-pump vs. weak-pump interaction.
3. For the review associated with the system walkdown of the service water intake
structure:
a. Copies of corrective maintenance for the last 6 years associated with service
water strainers, traveling screens and trash racks.
4
REQUEST FOR INFORMATION - HEAT SINK PERFORMANCE
b. Copies of the last two inspections and/or surveillances associated with service
water strainers, traveling screens and trash racks.
c. List of preventive maintenance, including frequency, associated with service
water strainers, traveling screens and trash racks.
d. Copies of abnormal procedures for the traveling screens and service water
strainers.
e. Copies of the last two inspections and/or surveillances documenting that
component mounts have not excessively degraded (i.e., due to corrosion).
For example, inspections for the mounts for the, Service water pumps,
service water strainers, traveling screens and trash racks.
f. Copies of the documents associated with the monitoring, trending, and
remediation of silt accumulation at the service water pump bay.
g. Copies of the last two surveillance procedures and testing results performed
on the service water pump bay water level instruments.
h. Copies of procedures associated with operating during adverse weather
conditions (e.g. icing, high temperatures, or low level).
i. Copy of the evaluation for the potential effects of low flow/level on underwater
weir walls intended to limit silt or sand intake, if applicable.
If the information requested above will not be available, please contact Mr. Lionel Rodriguez
as soon as possible at (630) 829-9609 or via e-mail Lionel.Rodriguez@nrc.gov.
5
P. Gardner -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 Mr. Lionel Rodriguez. We understand that our licensing contact
for this inspection is Mr. Stephen E. Sollom 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) 829-9609
or via e-mail at Lionel.Rodriguez@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.
In accordance with Title 10 of the Code of Federal Regulations (10 CFR) 2.390, Public Inspections,
Exemptions, Requests for Withholding, of the NRC's "Rules of Practice," a copy of this letter, its
enclosure, and your response (if any) will be available electronically for public inspection in the NRCs
Public Document Room or from the Publicly Available Records (PARS) component of the NRC's
Agencywide Documents Access and Management System (ADAMS). ADAMS is accessible from the
NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room).
Sincerely,
/RA/
David E. Hills, Acting Chief
Engineering Branch 2
Division of Reactor Safety
Docket No. 50-263
License No. DPR-22
Enclosure:
Triennial Heat Sink Performance
Inspection Document Request
cc: Distribution via LISTSERV
DISTRIBUTION:
Kimyata MorganButler Allan Barker
RidsNrrDorlLpl3-1 Resource Carole Ariano
RidsNrrPMMonticello Linda Linn
RidsNrrDirsIrib Resource DRPIII
Cynthia Pederson DRSIII
Richard Skokowski Carmen Olteanu
ADAMS Accession Number ML16041A048
Publicly Available Non-Publicly Available Sensitive Non-Sensitive
To receive a copy of this document, indicate in the concurrence box "C" = Copy without attach/encl "E" = Copy with attach/encl "N" = No copy
OFFICE RIII RIII RIII RIII
NAME LRodriguez:cl DHills
DATE 02/09/16 02/09/16
OFFICIAL RECORD COPY