ML14204A755

Ltr 07/21/14 Dresden Units 2 and 3 - Notification of an NRC Triennial Heat Sink Performance Inspection and Request for Information Inspection Report 05000237/2014005; 05000249/2014005

ML14204A755
Person / Time
Site:	Dresden
Issue date:	07/21/2014
From:	Stone A M NRC/RGN-III/DRS/EB2
To:	Pacilio M J Exelon Generation Co, Exelon Nuclear
Nestor Felix Adorno
References
IR-14-005
Download: ML14204A755 (9)

See also: IR 05000237/2014005

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION REGION III 2443 WARRENVILLE RD. SUITE 210 LISLE, IL 60532-4352 July 21, 2014 Mr. Michael J. Pacilio Senior VP, Exelon Generation Co., LLC President and CNO, Exelon Nuclear 4300 Winfield Road Warrenville, IL 60555 SUBJECT: DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3 - NOTIFICATION OF AN NRC TRIENNIAL HEAT SINK PERFORMANCE INSPECTION AND REQUEST FOR INFORMATION INSPECTION REPORT 05000237/2014005; 05000249/2014005 Dear Mr. Pacilio: On December 1, 2014, the U.S. Nuclear Regulatory Commission (NRC) will begin the on-site portion of the Triennial Heat Sink Performance Inspection at your Dresden Nuclear Power Station, Units 2 and 3. This inspection will be performed in accordance with NRC baseline inspection procedure (IP) 71111.07, "Heat Sink Performance." 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 6, 2014. By October 17, 2014, 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 November 17, 2014. 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 December 1, 2014. 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- 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 on-site inspection. The lead inspector for this inspection is Néstor J. Féliz Adorno. We understand that our

regulatory contact for this inspection is G. Graff of your organization. If there are questions about the material requested, or the inspection, please call Néstor J. Féliz Adorno at (630) 829-9739. Please send the information to the following e-mail address nestor.feliz-adorno@nrc.gov. A hard-copy or compact disc (CD) 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 Title 10, Code of Federal Regulations (CFR), Section 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 Stuart Sheldon Acting For/

Ann Marie Stone, Chief Engineering Branch 2 Division of Reactor Safety Docket Nos. 50-237; 50-249 License Nos. DPR-19; DPR-25 Enclosure: Triennial Heat Sink Performance Inspection Document Request cc w/encl: Distribution via LISTSERV

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST Enclosure Inspection Report: 05000237/2014005; 05000249/2014005 Inspection Dates: December 1 - 5, 2014 Inspection Procedure: Inspection Procedure 71111.07, "Heat Sink Performance" Lead Inspector: Néstor J. Féliz Adorno (630) 829-9739 nestor.feliz-adorno@nrc.gov I. Information Requested By October 6, 2014 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, heat exchanger testing, ultimate heat sink (UHS), and safety-related service and closed cooling water systems 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, UHS, and safety-related service and closed cooling water systems since the last heat sink performance inspection. 5. Last two System Health Report(s) and maintenance rule system notebooks for all the GL 89-13 heat exchangers, UHS, and safety-related service and closed cooling water systems. 6. List of engineering-related operator workarounds (with a short description) associated with GL 89-13 heat exchangers, UHS, and safety-related service and closed cooling water systems. 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, UHS, and safety-related service and closed cooling water systems. 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. 8. List of risk significant non-safety-related functions (with a short description) of the service water system and UHS.

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST 2 II. Information Requested By November 17, 2014 1. Copies of the GL 89-13 responses and commitments. 2. Copies of procedures developed to implement the recommendations of GL 89-13 (e.g., the GL 89-13 Heat Exchanger Program description). 3. Copies of the selected Corrective Action Program documents. 4. For the specific heat exchangers selected: a. Copy of system description and design basis document for the heat exchangers (as applicable). b. Provide a list of calculations (with a short description), which currently apply to each heat exchanger. c. 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. 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 design specification, heat exchanger data sheets, and vendor documents including component drawings applicable for the selected heat exchangers. f. Copies of normal, abnormal, and emergency operating procedures associated with the selected heat exchangers. 5. For the UHS and the safety-related service and closed cooling water systems (or equivalent): a. Copy of system description and design basis document (as applicable).

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST 3 a. Copy of any operability determinations or other documentation of degradation associated with the UHS and the safety-related service and closed cooling water systems. b. 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. c. Copy of the construction code and Design Specification. d. 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. e. Copies of the procedures associated with in-service test of the safety-related service and closed cooling water pumps. f. Copies of corrective action documents associated with waterhammer or hydraulic transients in the service water system since the last heat sink inspection. g. If available, provide an electronic copy of piping and instrumentation diagrams (P&IDs) for the service and closed cooling water systems, including the intake structure. h. Provide a list of calculations (with a short description), which currently apply to

UHS, service and closed cooling water systems. i. Copies of calculations and surveillances that determine the UHS reservoir capacity and heat transfer capability. j. Copy of calculation addressing safety-related service and closed cooling water systems flow balance. k. Provide a list of instruments (with a short description) associated with automatic or alarm functions for the safety-related service and closed cooling water systems and/or UHS. 6. A schedule of all inspections, cleanings, maintenance, or testing of any safety-related heat exchanger to be performed during the on-site portion of the inspection. 7. Electronic copies of the current Final Safety Analysis Report, Technical Specifications, Technical Specifications Basis, and Technical Report Manual. III. Information Requested to be Available on First Day of Inspection, December 1, 2014 1. For the specific heat exchangers selected: a. Copies of the two most recent completed tests and evaluation data confirming thermal performance for those heat exchangers, which are performance tested. b. Documentation and procedures that identify the types, accuracy, and location of any special instrumentation used for the two most recently completed thermal

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST 4 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. c. Information regarding any alarms, which monitor on-line performance. d. 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. e. The cleaning and inspection maintenance schedule for each heat exchanger for the next 5 years. f. Copy of the operating procedure that ensures that the maximum cooling water system inlet temperature limit is not exceeded. g. 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. h. 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. i. Copy of the document establishing the repair criteria (plugging limit) for degraded tubes which are identified in each heat exchanger. j. 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). k. Copies of those documents that describe the methods taken to control water chemistry in the heat exchangers. 2. For the review of the safety-related service and closed cooling water systems and 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 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.

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST 5 d. Copies of the documents that demonstrate that flow balance testing of the safety-related service water system was performed during the last three years. If the last flow test was performed longer than three years, then provide the last test. e. Copies of the documents that demonstrate that flow balance testing will continue to be periodically done in the future. f. Copies of procedures used to monitor interface valves between the safety-related sections of the service and closed cooling water systems, the non-safety-related sections, 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. Copies of the procedures that verify the performance of risk significant non-safety functions of the safety-related service water system 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 testing, inspection, or monitoring program procedures for buried or inaccessible piping of the service and closed cooling water systems 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. i. Copies of the ultrasonic test results and/or visual inspections that verify the structural integrity of the service and closed cooling water systems piping. j. Copies of the procedures to monitor, assess, and disposition active thru wall pipe leaks of the service and closed cooling water systems, including structural evaluations and/or planned corrective actions. k. History of any thru wall pipe leak on the service and closed cooling water systems. 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. l. Copies of the documents associated with the periodic inspection program used to detect protective coating failure, corrosion, and erosion of the service and closed cooling water systems. m. 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 Néstor J. Féliz Adorno as soon as possible at (630) 829-9739 or email nestor.feliz-adorno@nrc.gov.

M. Pacilio -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 on-site inspection. The lead inspector for this inspection is Néstor J. Féliz Adorno. We understand that our regulatory contact for this inspection is G. Graff of your organization. If there are questions about the material requested, or the inspection, please call Néstor J. Féliz Adorno at (630) 829-9739. Please send the information to the following e-mail address nestor.feliz-adorno@nrc.gov. A hard-copy or compact disc (CD) 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 Title 10, Code of Federal Regulations (CFR), Section 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 Stuart Sheldon Acting For/ Ann Marie Stone, Chief Engineering Branch 2 Division of Reactor Safety Docket Nos. 50-237; 50-249 License Nos. DPR-19; DPR-25 Enclosure: TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST cc w/encl: Distribution via LISTSERV DISTRIBUTION: See next Page DOCUMENT NAME: G:\DRSIII\DRS\Work in Progress\Ltr 072114 Dresden 2014 UHS RFI NFA.docx -Publicly Available -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 SSheldon for NAdorno:ls SSheldon for AMStone DATE 07/11/14 07/21/14 OFFICIAL RECORD COPY

Letter to Michael J. Pacilio from Ann Marie Stone dated July 21, 2014. SUBJECT: DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3 - NOTIFICATION OF AN NRC TRIENNIAL HEAT SINK PERFORMANCE INSPECTION AND REQUEST FOR INFORMATION INSPECTION REPORT 05000237/2014005; 05000249/2014005 DISTRIBUTION: Anthony Bowers RidsNrrDorlLpl3-2 Resource RidsNrrPMDresden Resource RidsNrrDirsIrib Resource Cynthia Pederson Darrell Roberts Steven Orth Allan Barker Carole Ariano Linda Linn DRPIII DRSIII Patricia Buckley Carmen Olteanu