ML102380199
| ML102380199 | |
| Person / Time | |
|---|---|
| Site: | Byron  |
| Issue date: | 08/25/2010 |
| From: | Ann Marie Stone NRC/RGN-III/DRS/EB2 |
| To: | Pacilio M Exelon Generation Co, Exelon Nuclear |
| References | |
| Download: ML102380199 (11) | |
See also: IR 05000454/2010005
Text
UNITED STATES
NUCLEAR REGULATORY COMMISSION
REGION III
2443 WARRENVILLE ROAD, SUITE 210
LISLE, IL 60532-4352
August 25, 2010
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:
BYRON STATION - NOTIFICATION OF AN NRC TRIENNIAL HEAT SINK
PERFORMANCE INSPECTION AND GAS ACCUMULATION
MANAGEMENT TEMPORARY INSPECTION; AND REQUEST FOR
INFORMATION 05000454/2010005; 05000455/2010005
Dear Mr. Pacilio:
On November 15, 2010, the NRC will begin the on-site portion of the Triennial Heat Sink
Performance Inspection and the Gas Accumulation Management in Emergency Core Cooling,
Decay Heat Removal, and Containment Spray Systems Temporary Instruction at your Byron
Station. These inspections will be performed in accordance with NRC baseline inspection
procedure (IP) 71111.07, and temporary instruction (TI) 2515/177, respectively.
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 September 30, 2010.
By October 7, 2010, the inspector will communicate the initial selected set of
approximately 2-3 risk significant heat exchangers for IP 71111.07 and the initial selected
samples for TI 2515/177.
The second group of documents requested, are those items needed to support our in-
office preparation activities. This set of documents should be available at the Regional
Office no later than November 4, 2010. This information should be separated by
inspection and by 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 on November 15, 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.
M. Pacilio
-2-
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 on-site inspection.
If no activities were accomplished associated with a specific request, then provide a statement
indicating that the request is not applicable.
The lead inspector for this inspection is Caroline Tilton. If there are questions about the material
requested, or the inspection, please call Mrs. Tilton at (630) 829-9718. Please send the
information to the following e-mail address HUcaroline.tilton@nrc.govUH. A hard-copy with the
required information is also an acceptable option.
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 C. Tilton Acting For/
Ann Marie Stone, Chief
Engineering Branch 2
Division of Reactor Safety
Docket Nos. 50-454; 50-455
Enclosures:
1.
Triennial Heat Sink Inspection Document Request
2.
Temporary Inspection Document Request, Management of Gas Accumulation in
Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems
cc w/encl:
Distribution via ListServ
TRIENNIAL HEAT SINK INSPECTION DOCUMENT REQUEST
1
Enclosure 1
UInspection ReportU:
05000454/2010-005; 05000455/2010-005
UInspection DatesU:
November 15 - 19, 2010, and November 29 - December 3, 2010
UInspection ProcedureU:
IP 71111.07, Triennial Heat Sink Performance Inspection
UInspectors:U
(630) 829-9718
HUcaroline.tilton@nrc.govU
(630) 829-9745
HUmichael.jones@nrc.govU
I.
Information Requested By September 30, 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 two years or since the last Triennial Heat Sink
Inspection.
4. Copy of any self-assessment done on any of GL 89-13 heat exchangers.
5. System health report(s) and maintenance rule system notebooks for all the GL 89-13
heat exchangers.
II.
Information Requested By November 4, 2010
1. For the specific heat exchangers selected:
a. Copies of the two most recent completed tests confirming thermal performance
for those heat exchangers which are performance tested;
b. Copy of system description and design basis document for the heat exchangers
(as applicable);
TRIENNIAL HEAT SINK INSPECTION DOCUMENT REQUEST
2
Enclosure 1
c. 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;
d. Copy of the Updated Final Safety Analysis Report (UFSAR) sections applicable for
each heat exchanger; and
e. Provide a list of calculations with a description which currently apply to each heat
exchanger.
2. A schedule of all inspections, cleanings, maintenance, or testing of any plant heat
exchanger to be done during the on-site portion of the inspection.
3. Copies of procedures developed to implement the recommendations of GL 89-13, e.g.,
the GL 89-13 Heat Exchanger Program description.
4. Updated Final Safety Analysis Report pages for the GL 89-13 Heat Exchanger
Program.
5. Maximum Cooling Water system inlet temperature limit that still allows full licensed
power operation of the nuclear reactor. Please provide the document that states this
limit (e.g., USAR or TRM) and the operating procedure that ensures this limit is not
exceeded.
III.
Information Requested to be Available on First Day of Inspection, November 15, 2010
1. For the specific heat exchangers selected:
a. Provide the Design Basis Documents and Updated Final Safety Analysis Report
pages for the selected heat exchangers;
b. Copy of the design specification and heat exchanger data sheets for each heat
exchanger;
c. Copy of the vendor manuals including component drawings for each heat
exchanger;
d. 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;
e. 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);
f.
Copy of the calculations or documents which evaluate the potential for water
hammer or excessive tube vibration in the heat exchanger or associated piping.
TRIENNIAL HEAT SINK INSPECTION DOCUMENT REQUEST
3
Enclosure 1
g. List of engineering-related Operator Workarounds/Temporary Modifications for
these heat exchangers since the last Heat Sink Performance;
h. Copy of the evaluations of data for the two most recent completed tests
confirming the thermal performance of each heat exchanger;
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.
Copies of those documents that describe the methods taken to control water
chemistry in the heat exchangers;
k. 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;
l.
The cleaning and inspection maintenance schedule for each heat exchanger for
the next five years;
m. Copy of the document describing the inspection results for the last two clean and
inspection activities completed on each heat exchanger;
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; and
p. Information regarding any alarms which monitor on-line
performance.
2. For the safety-related service water system (or equivalent):
a. Copies of any design changes performed on the system;
b. Copies of procedures for a loss of service water system;
c. Copies of inspections and/or maintenance related to macro-fouling (silt, dead
mussel shells, debris, etc.) and aquatic life such as fish, algae, grass, or kelp;
d. Copies of inspections and/or maintenance related to preventing biotic fouling;
e. Copies of procedures and/or test results to survey or monitor interface valves
between the safety-related section of the service water system and the
non-safety-related section;
TRIENNIAL HEAT SINK INSPECTION DOCUMENT REQUEST
4
Enclosure 1
f.
History of any thru wall pipe leak on the system; and
g. Copies of evaluations for strong-pump vs. weak-pump interaction.
If the information requested above will not be available, please contact the lead inspector.
TEMPORARY INSTRUCTION 2515/177 REQUEST FOR INFORMATION DOCUMENTS
1
Enclosure 2
UInspection ReportU:
05000454/2010005; 05000455/2010005
UOnsite Inspection DatesU:
November 15 - 19, 2010, and November 29 - December 3, 2010
UInspection ProcedureU:
TI 2515/177, Management of Gas Accumulation in Emergency
Core Cooling, Decay Heat Removal, and
Containment Spray Systems
UInspectorsU:
(630) 829-9718
HUcaroline.tilton@nrc.govU
(630) 829-9745
HUmichael.jones@nrc.govU
I
Information Requested By September 30, 2010
1.
Copy of the station response to Generic Letter (GL) 2008-01 and any supplemental
report.
2.
Copies of all the requests for additional information (RAIs) and the associated
responses.
3.
List of corrective action program documents (with a short description) associated
with GL 2008-01, voids in piping, and pressure transients for the previous three
years.
4.
List of the suction piping sections identified as susceptible to gas accumulation (the
list should identify the corresponding system).
5.
List of the discharge piping sections identified as susceptible to gas accumulation
(the list should identify the corresponding system).
6.
List of changes (with a short description and tracking number) to the Final Safety
Evaluation Report (FSAR), Technical Specifications, Technical Specification
Bases, and Technical Requirement Manual associated with the resolution of
7.
List of calculations that have been change or created in response to GL 2008-01
(with a short description of the calculation and the change).
8.
Copies of self-assessments associated with the implementation of the GL 2008-01
program.
TEMPORARY INSTRUCTION 2515/177 REQUEST FOR INFORMATION DOCUMENTS
2
Enclosure 2
II
Information Requested By November 4, 2010
1.
Copies of program documents and procedures developed to implement the
resolution of GL 2008-01.
2.
Copies of the selected corrective action program documents.
3.
Copies of the selected licensing and design basis document changes.
4.
Copies of isometric drawings of the subject systems (hard-copies are preferred).
5.
Copies of piping and instrumentation diagrams (P&IDs) of the subject systems
6.
(hard-copies are preferred).
7.
List of commitments (with a description) in response to GL 2008-01.
8.
List of actions that were completed in response to GL 2008-01.
9.
Copies of all the corrective actions identified in the nine-month response and
supplemental reports.
10. List (with a short description) of gas intrusion mechanisms that apply to the plant and
the affected system locations (e.g., identify the source, conditions, and expected
void locations).
11. Design basis documents of the subject systems (i.e., emergency core cooling, decay
heat removal, and containment spray systems).
12. Design basis documents of keep-full systems of the subject systems.
13.
If available, electronic copies of the current Technical Specifications, Technical
Specifications Basis, Final Safety Analysis Report, and Technical Report Manual.
III
Information Requested to be Available on First Day of Inspection, November
15, 2010
1.
Copies of surveillance procedures associated with the resolution of GL 2008-01 and
the results of the last two surveillances for the subject systems.
2.
Copies of the modification packages for hardware modifications as part of the
resolution of GL 2008-01.
3.
Copies of the selected calculations.
4.
Copies of procedures use for detecting and determining void volumes.
5.
Copies of procedures use for filling and venting.
TEMPORARY INSTRUCTION 2515/177 REQUEST FOR INFORMATION DOCUMENTS
3
Enclosure 2
6.
Subject systems walkdown work documents associated with the resolution of
GL 2008-01 and the results of these walkdowns.
7.
Copies of the engineering evaluations performed for all identified voids.
8.
Copies of trends of periodic venting results.
9.
Copy of the design change review checklist that establish if a design change
introduces or increases the potential for gas accumulation beyond established
acceptance criteria.
10. Copies of training documents that ensure that personnel are aware of gas-related
concerns.
11. Copy of the void transport analysis.
12. Basis for the void acceptance criteria (e.g., calculation). If applicable, provide the
justification for any deviation from the void acceptance criteria established by the
Office of Nuclear Reactor Regulations (NRR).
13. Basis for horizontal pipe acceptance criteria (e.g., calculation).
14.
Copy of vortexing calculations associated with systems under the scope of
15. If applicable, provide a list of inaccessible locations where plant walkdowns of the
subject systems have not been completed. Include an explanation of why each
area is considered inaccessible.
If you have questions regarding the information requested, please contact the lead inspector.
M. Pacilio
-2-
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 on-site inspection.
If no activities were accomplished associated with a specific request, then provide a statement indicating
that the request is not applicable.
The lead inspector for this inspection is Caroline Tilton. If there are questions about the material
requested, or the inspection, please call Mrs. Tilton at (630) 829-9718. Please send the information to
the following e-mail address HUcaroline.tilton@nrc.govUH. A hard-copy with the required information is also an
acceptable option.
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 C. Tilton Acting for/
Ann Marie Stone, Chief
Engineering Branch 2
Division of Reactor Safety
Docket Nos. 50-454; 50-455
Enclosures:
1.
Triennial Heat Sink Inspection Document Request
2.
Temporary Inspection Document Request, Management Of Gas Accumulation In Emergency Core
Cooling, Decay Heat Removal, And Containment Spray Systems
cc w/encl:
Distribution via ListServ
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08/25/10
OFFICIAL RECORD COPY
Letter to Mr. Michael Pacilio from Ms. Ann Marie Stone dated August 25, 2010.
SUBJECT:
BYRON STATION - NOTIFICATION OF AN NRC TRIENNIAL HEAT SINK
PERFORMANCE INSPECTION AND GAS ACCUMULATION
MANAGEMENT TEMPORARY INSPECTION; AND REQUEST FOR
INFORMATION 05000454/2010005; 05000455/2010005
UDISTRIBUTIONU:
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