ML11227A162
| ML11227A162 | |
| Person / Time | |
|---|---|
| Site: | Braidwood  |
| Issue date: | 08/10/2011 |
| From: | Ann Marie Stone NRC/RGN-III/DRS/EB2 |
| To: | Pacilio M Exelon Generation Co, Exelon Nuclear |
| References | |
| IR-11-005 | |
| Download: ML11227A162 (9) | |
See also: IR 05000456/2011005
Text
UNITED STATES
NUCLEAR REGULATORY COMMISSION
REGION III
2443 WARRENVILLE ROAD, SUITE 210
LISLE, IL 60532-4352
August 10, 2011
Mr. Michael J. Pacilio
Senior Vice President, Exelon Generation Company, LLC
President and Chief Nuclear Officer (CNO), Exelon Nuclear
4300 Winfield Road
Warrenville, IL 60555
SUBJECT: BRAIDWOOD STATION - NOTIFICATION OF AN NRC TRIENNIAL HEAT
SINK PERFORMANCE INSPECTION AND REQUEST FOR INFORMATION
INSPECTION REPORT 05000456/2011005; 05000457/2011005 (DRS)
Dear Mr. Pacilio:
On Monday, November 28, 2011, the U. S. Nuclear Regulatory Commission (NRC) will begin
the on-site portion of the Triennial Heat Sink Performance Inspection Braidwood Station. This
inspection will be performed in accordance with NRC baseline inspection procedure (IP)
71111.07T.
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 October 17, 2011. By
October 20, 2011, 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
November 14, 2011. 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 Monday,
November 28, 2011. 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.
M. Pacilio -2-
The lead inspector for this inspection is Mr. Gerard ODwyer. If there are questions about the
material requested, or the inspection, please call Mr. ODwyer at (630) 829-9624. Please send
the information to the following e-mail address Gerard.ODwyer@nrc.gov. A hard-copy with the
required information is also an acceptable option.
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.
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.
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 by A. Dunlop For/
Ann Marie Stone, Chief,
Engineering Branch 2
Division of Reactor Safety
Docket No. 50-456; 50-457
Enclosure: TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT
REQUEST
cc w/encl: Distribution via ListServ
TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST
Inspection Report: 05000456/2011005; 05000457/2011005(DRS)
Inspection Dates: November 28 thru December 2, 2011
Inspection Procedures: IP 71111.07, Heat Sink Performance
Lead Inspector: Gerard ODwyer
(630) 829-9624
Gerard.odwyer@nrc.gov
I. Information Requested By October 17, 2011
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.
1 Enclosure
TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST
II. Information Requested By November 14, 2011
1. Copy of the Updated Final Safety Analysis Report (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 applicable UFSAR sections 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.
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 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.
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.
6. Copies of Corrective Action Program implementing procedures.
7. If available, electronic copies of the current Technical Specifications, Technical
Specifications Basis, Final Safety Analysis Report, and Technical Report Manual.
2 Enclosure
TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST
III. Information Requested to be Available on First Day of Inspection, November 28,
2011
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. 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;
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;
3 Enclosure
TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST
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); and
q. Copies of those documents that describe the methods taken to control water
chemistry in the heat exchangers.
2. For the ultimate heat sink (UHS) and the safety-related service water system (or
equivalent):
a. 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;
b. 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;
c. Copies of procedures for a loss of UHS;
d. Copies of procedures for a loss of service water system;
e. 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;
f. Copies of documents associated with the monitoring of pump performance for
potential strong-pump vs. weak-pump interaction; and
4 Enclosure
TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST
g. 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.
h. Copies of the procedures to monitor, assess, and disposition active thru wall
pipe leaks, including structural evaluations and/or planned corrective actions.
i. 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.
j. Copies of the documents associated with the periodic inspection program
used to detect protective coating failure, corrosion, and erosion.
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
service water pump bay water level instruments. 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 Gerard ODwyer as soon
as possible at (630) 829-9624, or email Gerard.ODwyer@nrc.gov.
5 Enclosure
M. Pacilio -2-
The lead inspector for this inspection is Mr. Gerard ODwyer. If there are questions about the material
requested, or the inspection, please call Mr. ODwyer at (630) 829-9624. Please send the information to
the following e-mail address Gerard.ODwyer@nrc.gov. A hard-copy with the required information is also
an acceptable option.
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. 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.
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 by A. Dunlop For/
Ann Marie Stone, Chief,
Engineering Branch 2
Division of Reactor Safety
Docket No. 50-456; 50-457
Enclosure: TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST
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OFFICE RIII RIII
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DATE 8/ /11 8/ /11
OFFICIAL RECORD COPY
Letter to Mr. Michael J. Pacilio from Ms. Ann Marie Stone dated August 10, 2011.
SUBJECT: BRAIDWOOD STATION - NOTIFICATION OF AN NRC TRIENNIAL HEAT SINK
PERFORMANCE INSPECTION AND REQUEST FOR INFORMATION
INSPECTION REPORT 05000456/2011005; 05000457/2011005 (DRS)
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