ML13186A047

Ltr 7/1/13 Monticello Heat Sink Request for Information Jcs

ML13186A047
Person / Time
Site:	Monticello
Issue date:	07/01/2013
From:	Benny Jose NRC/RGN-III/DRS/EB2
To:	Schimmel M Northern States Power Co
Jorge Corujo Sandin
References
IR-13-004
Download: ML13186A047 (9)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION REGION III 2443 WARRENVILLE ROAD, SUITE 210 LISLE, IL 60532-4352 July 1, 2013 Mr. Mark Schimmel 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 05000263/2013004

Dear Mr. Schimmel:

On July 29, 2013, the U.S. Nuclear Regulatory Commission (NRC) will begin the onsite 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.

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.

• 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 July 18, 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 inspectors 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 July 29, 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.

This information request covers the period between March 2010 and the start of this inspection.

If no activities were accomplished in that time period, then the request applies to the last applicable time the activity was accomplished. It is important that your response to this request be as complete as possible, in order to minimize the number of documents requested during the preparation week or during the onsite inspection.

M. Schimmel The lead inspector for this inspection is Jorge Corujo-Sandin. If there are questions about the material requested, or the inspection, please call Mr. Corujo-Sandin at (630) 829-9741.

Please send the information to the following e-mail address Jorge.Corujo-Sandin@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. 50-263 License No. DRP-22

Enclosure:

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

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST Inspection Report: 05000263/2013004 Inspection Dates: July 29, 2013 through August 2, 2013 Inspection Procedure: Inspection Procedure 71111.07, Heat Sink Performance Lead Inspector: Jorge Corujo-Sandin (630) 829-9741 Jorge.Corujo-Sandin@nrc.gov This information request covers the period between March 2010 and the start of this inspection.

If no activities were accomplished in that time period, then the request applies to the last applicable time the activity was accomplished.

I. Information Requested By July 18, 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. Last two System Health Report(s) for all the GL 89-13 heat exchangers.

II. Information Requested By July 18, 2013

1. Copies of the GL 89-13 responses.

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. 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. 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 construction code, Design Specification, heat exchanger data sheets, and vendor documents including component drawings applicable for the heat exchangers.

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TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

e. Copies of normal, abnormal, and emergency operating procedures associated with the selected heat exchangers.

f. 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).

g. 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.

h. Copy of the calculations or documents which evaluate the potential for water hammer in each heat exchanger or associated piping.

i. 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.

j. 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.

k. List of corrective action program documents (with a short description) associated with selected heat exchangers, heat sinks, silting, corrosion, fouling, or heat exchanger testing for the stated period.

l. Copy of any self-assessment associated with any selected heat exchangers.

m. Maintenance rule system notebooks for selected heat exchangers.

n. List of engineering-related operator workarounds (with a short description) associated with selected heat exchangers. This includes workarounds which may have been opened or resolved during the stated period.

o. List of permanent and temporary modifications (with a short description) associated with selected heat exchangers. This includes modifications which may have been opened or resolved during the stated period.

p. Copy of heat exchanger performance trending data tracked for selected heat exchangers.

5. 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.

2 Enclosure

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

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 the construction code and Design Specification.

f. 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.

g. Copies of corrective action documents associated with waterhammer or hydraulic transients in the service water system since the last Heat Sink Inspection.

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

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

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

k. A list of instruments (with a short description) associated with automatic or alarm functions for the safety-related service water system and/or UHS.

l. A list of any design change (with a short description) performed on the UHS or safety-related service water system since March 2010.

6. A schedule of all inspections, cleanings, maintenance, or testing of any safety-related plant heat exchanger scheduled during the onsite portion of the inspection.

III. Information Requested to be Available on First Day of Inspection, July 29, 2013

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 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.

3 Enclosure

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

d. Copy of the document describing the inspection results of each heat exchanger.

e. The cleaning and inspection maintenance schedule for each heat exchanger for the next 5 years.

f. Copy of the design specification and heat exchanger data sheets for each heat exchanger.

g. Copy of the vendor manuals including component drawings for each heat exchanger.

h. Copy of the document establishing the repair criteria (plugging limit) for degraded tubes which are identified in each heat exchanger.

i. 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).

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

2. For the UHS:

a. Copies of the inspection procedures for the verification of the structural integrity of underwater UHS and the associated results obtained during the stated period.

b. Copies of the maintenance and/or inspection procedures for underwater UHS sediment intrusion and the associated results (including underwater diving inspections and/or sediment removal activities) obtained during the stated period.

c. Copies of surveillance procedures and testing results performed during the stated period on the instrumentation relied upon to determine UHS reservoir capability.

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.

4 Enclosure

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

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 obtained during the stated period.

e. Copies of the procedures that verify the performance of risk significant non-safety functions and the associated results obtained during the stated period.

If the information requested above will not be available, please contact Mr. Corujo-Sandin as soon as possible at (630) 829-9741 or email Jorge.Corujo-Sandin@nrc.gov.

5 Enclosure

M. Schimmel The lead inspector for this inspection is Jorge Corujo-Sandin. If there are questions about the material requested, or the inspection, please call Mr. Corujo-Sandin at (630) 829-9741. Please send the information to the following e-mail address Jorge.Corujo-Sandin@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. 50-263 License No. DRP-22

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 7 13 Heat Sink RFI Monticello JCS.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 JCorujo-Sandin:ls BJose DATE 07/01/13 07/01/13 OFFICIAL RECORD COPY

Letter to Mr. Mark Schimmel from Ms. Ann Marie Stone dated July 01, 2013.

SUBJECT:

MONTICELLO NUCLEAR GENERATING PLANT - NOTIFICATION OF AN NRC TRIENNIAL HEAT SINK PERFORMANCE INSPECTION AND REQUEST FOR INFORMATION 05000263/2013004 DISTRIBUTION:

Vivian Campbell RidsNrrDorlLpl3-1 Resource RidsNrrPMMonticello RidsNrrDirsIrib Resource Chuck Casto Cynthia Pederson Steven Orth Allan Barker Carole Ariano Linda Linn DRPIII DRSIII Patricia Buckley Tammy Tomczak