ML13241A501

Ltr 8/28/13 Byron Heat Sink Performance Inspection and Request for Information

ML13241A501
Person / Time
Site:	Byron
Issue date:	08/28/2013
From:	Benny Jose NRC/RGN-III/DRS/EB2
To:	Pacilio M Exelon Generation Co
Michael Jones
References
IR-13-004
Download: ML13241A501 (10)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION REGION III 2443 WARRENVILLE ROAD, SUITE 210 LISLE, IL 60532-4352 August 28, 2013 Mr. Michael J. Pacilio Senior Vice President, Exelon Generation Co., LLC President and Chief Nuclear Officer, Exelon Nuclear 4300 Winfield Road Warrenville, IL 60555

SUBJECT:

BYRON STATION, UNITS 1 AND 2 - NOTIFICATION OF AN NRC TRIENNIAL HEAT SINK PERFORMANCE INSPECTION AND REQUEST FOR INFORMATION INSPECTION REPORT 05000454/2013004; 05000455/2013004

Dear Mr. Pacilio:

On Monday, November 4, 2013, the U.S. Nuclear Regulatory Commission (NRC) will begin the onsite portion of the Triennial Heat Sink Performance Inspection at your Byron Station, Units 1 and 2. This inspection will be performed in accordance with NRC Baseline Inspection Procedure (IP) 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 Friday, September 27, 2013. By Friday, October 3, 2013, 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 Monday, October 21, 2013. 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 4, 2013. 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 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. Michael A. Jones Jr. We understand that our regulatory contact for this inspection is Ms. Lisa Zurawski of your organization. If there are questions about the material requested, or the inspection, please call Mr. Michael A. Jones Jr.

at (630) 829-9745. Please send the information to the following e-mail address michael.jones@nrc.gov. 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 System (PARS) component of NRC's Agencywide Documents Access and Management System (ADAMS), accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room).

Sincerely,

/RA/

Benny Jose, Acting Chief Engineering Branch 2 Division of Reactor Safety Docket No. 50-454; 50-455 License No. DRP-37; DRP-66

Enclosure:

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST cc w/encl: Distribution via ListServ'

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST Inspection Report: 05000454/2013004; 05000455/2013004 Inspection Dates: November 4 - 8, 2013 Inspection Procedure: Inspection Procedure 71111.07, Heat Sink Performance Lead Inspector: Michael A. Jones Jr.

(630) 829-9745 michael.jones@nrc.gov I. Information Requested By Friday, September 27, 2013

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.

II. Information Requested By Monday, October 21, 2013

1. Copies of the GL 89-13 responses and commitments.

1 Enclosure

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

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 corrective action program documents.

5. For the specific heat exchangers selected:

a. Copies of the 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.

d. Provide the calculations or evaluations 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.

e. Copy of any operability determination or other documentation of degradation associated with the heat exchangers or the systems that support the operation for the selected heat exchangers.

f. Copy of the Design Specification, heat exchanger data sheets, and vendor documents including component drawings applicable for the heat exchangers.

g. 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.

2 Enclosure

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

b. Copy of system description and design basis document (as applicable).

c. Copy of any operability determination 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.

h. Copies of the procedures associated with in-service test of the safety-related service water pumps.

i. Copies of corrective action documents associated with water hammer or hydraulic transients in the service water system.

j. If available, provide an electronic copy of piping and instrumentation diagrams (P&IDs) for the service water system, including the intake structure.

k. Provide a list of calculations (with a short description), which currently apply to UHS and service water system.

l. 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.

m. 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 on-site portion of the inspection.

8. If available, electronic copies of the current Technical Specifications, Technical Specifications Basis, and Technical Report Manual.

3 Enclosure

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST III. Information Requested to be Available on First Day of Inspection, Monday, November 4, 2013

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 five 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 4 Enclosure

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST 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).

q. Copies of those documents that describe the methods taken to control water chemistry in the heat exchangers.

2. For the UHS

a. Copies of calculations and surveillances that determine the UHS reservoir capacity and heat transfer capability.

b. 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.

c. Copies of documents associated with the periodic monitoring and trending of sediment built-up.

d. Copies of the procedures used for verifying that adjacent non-seismic or non-safety related structures cannot degrade or block safety-related flow paths during severe weather or seismic events.

e. Copies of procedures for the periodic performance monitoring of heat transfer capacity 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.

f. Copies of the inspection procedures for the verification of the structural integrity of the UHS 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.

g. Copy of the calculation associated with the structural integrity of 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.

5 Enclosure

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

3. For the review of the performance testing of the safety-related service water system (or equivalent) and the UHS:

a. Copies of the last two performance tests, such as the ASME in-service test, for the pumps, valves, and, if applicable, the towers fans in the safety-related service water system. If the components are not performance tested, please provide documentation verifying performance by the methods actually used.

b. Copies of the documents that demonstrate that flow balance testing was performed during the last three years. If the last flow test was performed longer than three years, then provide the last flow test.

c. Copies of the documents that demonstrate that flow balance testing will continue to be periodically done in the future.

d. Copies of procedures used to monitor interface valves between the safety related section of the service water system and the non-safety-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.

e. 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.

4. For the review associated with the system walkdown of the essential service water system.

a. 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.

b. Copies of the ultrasonic test results and/or visual inspections that verify the structural integrity of the piping.

c. Copies of the procedures to monitor assess, and disposition active thru wall pipe leaks, including structural evaluations and/or planned corrective actions.

d. 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.

e. Copies of the documents associated with the Periodic Inspection Program used to detect protective coating failure, corrosion, and erosion.

6 Enclosure

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

f. 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. Michael A. Jones Jr.

as soon as possible at (630) 829-9745 or email Michael.jones@nrc.gov.

7 Enclosure

M. Pacilio The lead inspector for this inspection is Mr. Michael A. Jones Jr. We understand that our regulatory contact for this inspection is Lisa Zurawski of your organization. If there are questions about the material requested, or the inspection, please call Mr. Michael A. Jones Jr at (630) 829-9745. Please send the information to the following e-mail address michael.jones@nrc.gov. 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 System (PARS) component of NRC's Agencywide Documents Access and Management System (ADAMS), accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room).

Sincerely,

/RA/

Benny Jose, Acting Chief Engineering Branch 2 Division of Reactor Safety Docket No. 50-454; 50-455 License No. DRP-37; DRP-66

Enclosure:

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST DISTRIBUTION:

Vivian Campbell RidsNrrDorlLpl3-2 Resource RidsNrrPMByron Resource RidsNrrDirsIrib Resource Cynthia Pederson Anne Boland Steven Orth Allan Barker Carole Ariano Linda Linn DRPIII DRSIII Tammy Tomczak Patricia Buckley DOCUMENT NAME: G:\DRSIII\DRS\Work in Progress\Ltr 8 13 Byron Heat Sink RFI.docx 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 NAME MJones:ls BJose DATE 08/28/13 08/28/13 OFFICIAL RECORD COPY