ML100690467
| ML100690467 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 03/10/2010 |
| From: | Jamie Benjamin NRC/RGN-III/DRS/EB2 |
| To: | O'Connor T Northern States Power Co |
| References | |
| IR-10-003 | |
| Download: ML100690467 (9) | |
See also: IR 05000263/2010003
Text
UNITED STATES
NUCLEAR REGULATORY COMMISSION
REGION III
2443 WARRENVILLE ROAD, SUITE 210
LISLE, IL 60532-4352
March 10, 2010
Mr. Timothy J. OConnor
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 05000263/2010003
Dear Mr. OConnor:
On April 26, 2010, the NRC will begin the on-site 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 (IP) 71111.07. The onsite
portion of the inspection will take place on April 26 - 30, 2010.
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 29, 2010. By
April 5, 2010, the inspector will communicate the initial selected set of approximately 2-3
risk significant heat exchangers.
The second group of documents requested is those items 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 16, 2010. This information should be separated by 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 to the inspector by the first day of
the onsite inspection, April 26, 2010. 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.
T. OConnor
-2-
The lead inspector for this inspection is Mr. Gerard ODwyer. We understand that our regulatory
contact for this inspection is Mr. Ronald N. Baumer of your organization. If there are questions
about the inspection or material requested, please contact the lead inspector at (630) 829-9624
or via email gerard.odwyer@nrc.gov.
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. A
hard-copy with the required information is also an acceptable option.
All requested documents are to be within the time period from the onsite inspection 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 documents in the previous time period.
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 10 CFR 2.390 of the NRC's "Rules of Practice," a copy of this letter and its
enclosure will be available electronically for public inspection in the NRC Public Document
Room or from the Publicly Available Records (PARS) component of NRC's document system
(ADAMS), accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the
Public Electronic Reading Room).
Sincerely,
/RA/
Jamie Benjamin, Acting Chief
Engineering Branch 2
Division of Reactor Safety
Docket No. 50-263;
License No. DRP-22
Enclosure: TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST
cc w/encl: Distribution via ListServ
TRIENNIAL HEAT SIK PERFORMANCE INSPECTION DOCUMENT REQUEST
Inspection Report: 05000263/2010003
Inspection Dates:
April 26 - 30, 2010 Inspection week
Inspection Procedure:
IP 71111.07, Heat Sink Performance
Lead Inspector:
Gerard ODwyer
(630) 829-9624
Gerard.Odwyer@nrc.gov
I.
Information Requested By March 29, 2010
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 three years or since the last corrective action
program document list was sent to the NRC for the previous heat sink performance
inspection. The list should include all corrective action program documents not on
the last corrective action program document list.
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.
Enclosure
1
TRIENNIAL HEAT SIK PERFORMANCE INSPECTION DOCUMENT REQUEST
Enclosure
2
2. Information Requested By April 16, 2010
1.
Copy of the UFSAR section applicable to the GL 89-13 Heat Exchanger Program.
2.
Copies of procedures developed to implement the recommendations of GL 89-13
(e.g., the GL 89-13 Heat Exchanger Program description).
3.
For the specific heat exchangers selected:
a. Copies of the Updated Final Safety Analysis Report (UFSAR) sections applicable
for each heat exchanger;
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; and
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.
4.
For the ultimate heat sink (UHS) and the safety-related service water system
(or equivalent):
a. Copies of the applicable Updated Final Safety Analysis Report (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; and
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.
5.
A schedule of all inspections, cleanings, maintenance, or testing of any
safety-related plant heat exchanger to be performed during the on-site portion of the
inspection.
3. Information Requested to be Available on First Day of Inspection, April 26, 2010
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);
TRIENNIAL HEAT SIK PERFORMANCE INSPECTION DOCUMENT REQUEST
Enclosure
3
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;
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. 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. 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);
TRIENNIAL HEAT SIK PERFORMANCE INSPECTION DOCUMENT REQUEST
Enclosure
4
q. Copies of those documents that describe the methods taken to control water
chemistry in the heat exchangers;
4.
For the review of the operation of the safety-related service water system (or
equivalent) and the UHS:
1.
Copies of any design change performed on the UHS. 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.
2.
Copies of any design change performed on the safety-related service water
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.
3.
Copies of procedures for a loss of UHS.
4.
Copies of procedures for a loss of service water system.
5.
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.
6.
Copies of chemistry procedures that monitor for pH, calcium hardness, etc. Also,
provide copies of 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.
7.
Copies of documents associated with the monitoring of pump performance for
potential strong-pump vs. weak-pump interaction.
5.
For the review associated with the system walkdown of the Closed Cooling
Water System :
1.
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.
2.
Copies of the ultrasonic test results and/or visual inspections that verify the
structural integrity of the piping.
3.
Copies of the procedures to monitor assess, and disposition active through wall
pipe leaks, including structural evaluations and/or planned corrective actions.
TRIENNIAL HEAT SIK PERFORMANCE INSPECTION DOCUMENT REQUEST
Enclosure
5
4.
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.
5.
Copies of the documents associated with the periodic inspection program used to
detect protective coating failure, corrosion, and erosion.
6.
Copies of the IST 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.
If the information requested above will not be available, please contact Mr. ODwyer as soon as
possible at (630) 829-9624 or email at Gerard.Odwyer@nrc.gov.
T. OConnor
-2-
The lead inspector for this inspection is Mr. Gerard ODwyer. We understand that our regulatory contact
for this inspection is Mr. Ronald N. Baumer of your organization. If there are questions about the
inspection or material requested, please contact the lead inspector at (630) 829-9624 or via email
gerard.odwyer@nrc.gov.
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. A hard-copy with the
required information is also an acceptable option.
All requested documents are to be within the time period from the onsite inspection 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 documents
in the previous time period.
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 10 CFR 2.390 of the NRC's "Rules of Practice," a copy of this letter and its enclosure
will be available electronically for public inspection in the NRC Public Document Room or from the
Publicly Available Records (PARS) component of NRC's document system (ADAMS), accessible from the
NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room).
Sincerely,
/RA/
Jamie Benjamin, Acting Chief
Engineering Branch 2
Division of Reactor Safety
Docket No. 50-263;
License No. DRP-22
Enclosure:
TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST
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NAME
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DATE
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03/10/10
OFFICIAL RECORD COPY
Letter to Mr. Timothy OConnor from Mr. Jamie Benjamin dated March 10, 2010.
SUBJECT:
MONTICELLO NUCLEAR GENERATING PLANT - NOTIFICATION OF AN NRC
TRIENNIAL HEAT SINK PERFORMANCE INSPECTION AND REQUEST FOR
INFORMATION -- INSPECTION REPORT 05000263/2010003
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