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{{#Wiki_filter:         July 25, 2013   Mr. Edward D. Halpin Senior Vice President and  
[[Issue date::July 25, 2013]]
  Chief Nuclear Officer  
 
Pacific Gas and Electric Company  
Mr. Edward D. Halpin Senior Vice President and Chief Nuclear Officer Pacific Gas and Electric Company Diablo Canyon Power Plant P.O. Box 56, Mail Code 104/6 Avila Beach, CA 93424
Diablo Canyon Power Plant  
 
P.O. Box 56, Mail Code 104/6  
SUBJECT: DIABLO CANYON POWER PLANT - NOTIFICATION OF NRC TRIENNIAL HEAT SINK PERFORMANCE INSPECTION (05000275/2013004 AND 05000323/2013004) AND REQUEST FOR INFORMATION Dear Mr. Halpin The purpose of this letter is to notify you that U.S. Nuclear Regulatory Commission Region IV staff will conduct a triennial heat sink performance inspection at your Diablo Canyon Power Plant. The inspection will be comprised of two reactor inspectors from the NRC Region IV office. The inspection will be conducted in accordance with NRC Inspection Procedure 71111.07, "Heat Sink Performance." The schedule for the inspection is as follows:  
Avila Beach, CA 93424   SUBJECT: DIABLO CANYON POWER PLANT - NOTIFICATION OF NRC TRIENNIAL HEAT SINK PERFORMANCE INSPECTION (05000275/2013004 AND 05000323/2013004) AND REQUEST FOR INFORMATION
 
Dear Mr. Halpin  
Onsite Inspection Dates: September 9 - 12, 2013 Experience has shown that this inspection is resource intensive both for the NRC inspectors and your staff. In order to minimize the impact to your onsite resources and to ensure a productive inspection, we have enclosed a request for documents needed for this inspection.
The purpose of this letter is to notify you that U.S. Nuclear Regulatory Commission Region IV staff will conduct a triennial heat sink performance inspection at your Diablo Canyon Power Plant. The inspection will be comprised of two reactor inspectors from the NRC Region IV office. The inspection will be conducted in accordance with NRC Inspection Procedure  
 
71111.07, "Heat Sink Performance." The schedule for the inspection is as follows:  
Please note that the documents are requested to be provided by August 26, 2013. We request, that during the onsite inspection week, you ensure that copies of analyses, evaluations, or documentation regarding the implementation and maintenance of your heat exchanger program are available. Of specific interest are those documents that establish that your heat exchanger program satisfies NRC regulatory requirements and conforms to applicable NRC guidance. Also, appropriate personnel knowledgeable of safety-related heat exchangers should be available to support the inspector at the site during the inspection.
 
Onsite Inspection Dates: September 9 - 12, 2013 Experience has shown that this inspection is resource intensive both for the NRC inspectors and your staff. In order to minimize the impact to your onsite resources and to ensure a productive inspection, we have enclosed a request for documents needed for this inspection.
E. Halpin - 2 - We have discussed the schedule for this inspection activity with your staff and understand that our regulatory contact for this inspection will be Mike McCoy of your licensing organization. If there are any questions about this inspection or the material requested, please contact the inspectors, Wayne Sifre, at 817-200-1193 or by e-mail at Wayne.Sifre@nrc.gov, or Christie Hale at 650-479-5434 or e-mail at Christie.Hale@nrc.gov.
Please note that the documents are requested to be provided by August 26, 2013. We request, that during the onsite inspection week, you ensure that copies of analyses, evaluations, or  
 
documentation regarding the implementation and maintenance of your heat exchanger program are available. Of specific interest are those documents that establish that your heat exchanger program satisfies NRC regulatory requirements and conforms to applicable NRC guidance. Also, appropriate personnel knowledgeable of safety-related heat exchangers should be  
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.
available to support the inspector at the site during the inspection.  
 
  UNITED STATESNUCLEAR REGULATORY COMMISSIONREGION IV1600 EAST LAMAR BLVDARLINGTON, TEXAS 76011-4511
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). ADAMS is accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room).
E. Halpin - 2 -   We have discussed the schedule for this inspection activity with your staff and understand that our regulatory contact for this inspection will be Mike McCoy of your licensing organization. If  
 
there are any questions about this inspection or the material requested, please contact the  
Sincerely,/RA/ Thomas R. Farnholtz, Chief Engineering Branch 1 Division of Reactor Safety  
inspectors, Wayne Sifre, at 817-200-1193 or by e-mail at Wayne.Sifre@nrc.gov, or Christie Hale at 650-479-5434 or e-mail at Christie.Hale@nrc.gov.  
 
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  
Docket Nos.: 05000275, 05000323 License Nos.: DPR-80; DPR-82  
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.  
===Enclosure:===
Triennial Heat Sink Performance Inspection Request for Information cc: Electronic Distribution for Diablo Canyon Power Plant  
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). ADAMS is accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room). Sincerely,
E. Halpin - 3 -
/RA/   Thomas R. Farnholtz, Chief  
ADAMS ACCESSION NUMBER: ML13206A189 SUNSI Review Complete Initials: WCS Non-Sensitive Sensitive Publicly Available Non-Publicly Available SRI:EB1 RI:EB1 C:EB1 WSifre CHale TFarnholtz /RA/ /RA/ /RA/ 7/24/13 7/25/13 7/25/13 OFFICIAL RECORD COPY Enclosure Request for Information Triennial Heat Sink Performance Inspection Diablo Canyon Power Plant Inspection Report: 05000275/2013004, 05000323/2013004  
Engineering Branch 1 Division of Reactor Safety
 
Inspection Dates: September 9 - 12, 2013 Inspection Procedure: IP 71111.07, Triennial "Heat Sink Performance" Inspectors: Wayne Sifre, Senior Reactor Inspector Christie Hale, Reactor Inspector Information Requested for the In-Office Preparation Week The following information should be sent to the Region IV office in hard copy or electronic format (Certrec IMS preferred), to the attention of Wayne Sifre, by August 26, 2013. The inspector will select specific items from the information requested below and then request from your staff additional documents needed during the onsite inspection week. Also, we request that you categorize the documents in your response with the numbered list below. Please provide requested documentation electronically if possible. If requested documents are large and only hard copy formats are available, please inform the inspector, and provide subject documentation during the first day of the onsite inspection. If you have any questions regarding this information request, please call the lead inspector as soon as possible.
Docket Nos.: 05000275, 05000323  
 
License Nos.: DPR-80; DPR-82  
Enclosure: Triennial Heat Sink Performance Inspection Request for Information
cc: Electronic Distribution for Diablo Canyon Power Plant  
 
E. Halpin - 3 -
ADAMS ACCESSION NUMBER:   ML13206A189 SUNSI Review Complete Initials: WCS Non-Sensitive Sensitive Publicly Available Non-Publicly Available SRI:EB1 RI:EB1 C:EB1 WSifre CHale TFarnholtz /RA/ /RA/ /RA/ 7/24/13 7/25/13 7/25/13 OFFICIAL RECORD COPY  
  - 1 - Enclosure Request for Information Triennial Heat Sink Performance Inspection Diablo Canyon Power Plant  
Inspection Report:   05000275/2013004, 05000323/2013004
Inspection Dates: September 9 - 12, 2013  
Inspection Procedure: IP 71111.07, Triennial "Heat Sink Performance"  
Inspectors:   Wayne Sifre, Senior Reactor Inspector  
    Christie Hale, Reactor Inspector
Information Requested for the In-Office Preparation Week The following information should be sent to the Region IV office in hard copy or electronic  
format (Certrec IMS preferred), to the attention of Wayne Sifre, by August 26, 2013. The inspector will select specific items from the information requested below and then request from your staff additional documents needed during the onsite inspection week. Also, we request that you categorize the documents in your response with the numbered list below. Please provide requested documentation electronically if possible. If requested documents are large and only hard copy formats are available, please inform the inspector, and provide subject documentation during the first day of the onsite inspection. If you have any questions regarding this information request, please call the lead inspector as soon as possible.  
The following heat exchangers/heat sinks have been selected for inspection:  
The following heat exchangers/heat sinks have been selected for inspection:  
  * Residual Heat Removal Heat Exchangers (RHR HX 2-1, RHR HX 2-2) * Safety Injection Pump Lube Oil and Seal Water Coolers (2-2, 2-2A/B, 2-1, 2-1A/B) * Spent Fuel Pit Heat Exchanger (HX 2-1) * Component Cooling Water (CCW HX 2-1, CCW HX 2-2) For all Generic Letter 89-13 exchangers: 1. List of corrective action program documents (with a short description) associated with Generic Letter 89-13 heat exchangers, heat sinks, silting, corrosion, fouling, heat exchanger cavitation, or heat exchanger testing, in the previous three years 2. System health report(s) and maintenance rule system notebooks for all the Generic Letter 89-13 heat exchangers 3. Copy of any self-assessments done on any Generic Letter 89-13 heat exchangers in the previous three years 4. Copies of any procedures developed to implement the recommendations of Generic Letter 89-13, e.g., the Generic Letter 89-13 Heat Exchanger Program description 5. Copies of any commitments to the Generic Letter 89-13 program Enclosure For the specific heat exchangers selected: Testing Documents 6. Copies of the two most recent completed tests confirming thermal performance for those heat exchangers which are performance tested 7. Instrument uncertainties of the instruments used during testing 8. 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 9. Documents that show the as-found results are recorded, evaluated, and appropriately dispositioned such that the as-left condition is acceptable Cleaning Documents 10. The cleaning and inspection maintenance schedule for each heat exchanger for the next five years 11. Copy of the document describing the inspection results for the last two cleaning and inspection activities completed on each heat exchanger 12. Cleaning procedures with acceptance criteria for the selected heat exchangers 13. 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 14. Copies of those documents that describe the methods taken to control water chemistry in the heat exchangers Design Documents 15. Copies of the design basis documents and updated final safety analysis report pages for the selected heat exchangers 16. Provide a list of calculations with a description which currently apply to each heat exchanger 17. Copies of vendor data sheets and design basis data for the selected heat exchangers 18. 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 19. 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) 20. Copy of the calculations or documents which evaluate the potential for water hammer or excessive tube vibration in the heat exchanger or associated piping Enclosure 21. 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 22. Copy of the document establishing the repair criteria (plugging limit) for degraded tubes which are identified in each heat exchanger For the ultimate heat sink or safety-related service water system: 23. Dam inspections that monitor the integrity of the ultimate heat sink (if applicable) 24. Copies of calculations and surveillances that determine the ultimate heat sink reservoir capacity and heat transfer capability (if applicable) 25. Copies of any design changes performed on the ultimate heat sink or safety-related service water system 26. Copies of procedures for a loss of ultimate heat sink or safety-related service water system 27. Copies of inspections and/or maintenance related to macrofouling (silt, mussel shells, debris, etc.) and aquatic life 28. Copies of inspections and/or maintenance related to preventing biotic fouling 29. 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 nonsafety related section 30. Copy of the most recent service water flow balance test results, both as-found and as-left 31. History of any thru-wall pipe leaks on the safety-related service water system  
  * Residual Heat Removal Heat Exchangers (RHR HX 2-1, RHR HX 2-2) * Safety Injection Pump Lube Oil and Seal Water Coolers (2-2, 2-2A/B, 2-1, 2-1A/B) * Spent Fuel Pit Heat Exchanger (HX 2-1) * Component Cooling Water (CCW HX 2-1, CCW HX 2-2) For all Generic Letter 89-13 exchangers: 1. List of corrective action program documents (with a short description) associated with Generic Letter 89-13 heat exchangers, heat sinks, silting, corrosion, fouling, heat  
 
exchanger cavitation, or heat exchanger testing, in the previous three years 2. System health report(s) and maintenance rule system notebooks for all the Generic Letter 89-13 heat exchangers   3. Copy of any self-assessments done on any Generic Letter 89-13 heat exchangers in the previous three years   4. Copies of any procedures developed to implement the recommendations of Generic Letter 89-13, e.g., the Generic Letter 89-13 Heat Exchanger Program description
Inspector Contact Information:
5. Copies of any commitments to the Generic Letter 89-13 program
Wayne C. Sifre Christie Hale Senior Reactor Inspector Reactor Inspector 817-200-1193 650-479-5434 Wayne.Sifre@nrc.gov Christie.Hale@nrc.gov Mailing Address:  
  - 2 - Enclosure For the specific heat exchangers selected: Testing Documents 6. Copies of the two most recent completed tests confirming thermal performance for those heat exchangers which are performance tested   7. Instrument uncertainties of the instruments used during testing 8. 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   9. Documents that show the as-found results are recorded, evaluated, and appropriately dispositioned such that the as-left condition is acceptable Cleaning Documents 10. The cleaning and inspection maintenance schedule for each heat exchanger for the next five years   11. Copy of the document describing the inspection results for the last two cleaning and inspection activities completed on each heat exchanger   12. Cleaning procedures with acceptance criteria for the selected heat exchangers 13. 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   14. Copies of those documents that describe the methods taken to control water chemistry in the heat exchangers   Design Documents 15. Copies of the design basis documents and updated final safety analysis report pages for the selected heat exchangers   16. Provide a list of calculations with a description which currently apply to each heat exchanger   17. Copies of vendor data sheets and design basis data for the selected heat exchangers   18. 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   19. 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  
U.S. NRC, Region IV Attn: Wayne C. Sifre 1600 East Lamar Blvd.
acceptance criteria) 20. Copy of the calculations or documents which evaluate the potential for water hammer or excessive tube vibration in the heat exchanger or associated piping  
  - 3 - Enclosure 21. 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   22. Copy of the document establishing the repair criteria (plugging limit) for degraded tubes which are identified in each heat exchanger   For the ultimate heat sink or safety-related service water system:   23. Dam inspections that monitor the integrity of the ultimate heat sink (if applicable) 24. Copies of calculations and surveillances that determine the ultimate heat sink reservoir capacity and heat transfer capability (if applicable) 25. Copies of any design changes performed on the ultimate heat sink or safety-related service water system   26. Copies of procedures for a loss of ultimate heat sink or safety-related service water system   27. Copies of inspections and/or maintenance related to macrofouling (silt, mussel shells, debris, etc.) and aquatic life 28. Copies of inspections and/or maintenance related to preventing biotic fouling   29. 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 nonsafety related section   30. Copy of the most recent service water flow balance test results, both as-found and as-left 31. History of any thru-wall pipe leaks on the safety-related service water system  
Inspector Contact Information:
Wayne C. Sifre   Christie Hale Senior Reactor Inspector Reactor Inspector  
817-200-1193   650-479-5434 Wayne.Sifre@nrc.gov   Christie.Hale@nrc.gov  
Mailing Address:  
U.S. NRC, Region IV Attn: Wayne C. Sifre 1600 East Lamar Blvd.  
Arlington, TX 76011-4511
 


Arlington, TX 76011-4511
}}
}}

Revision as of 15:12, 22 March 2018

IR 05000275-13-004, and 05000323-13-004, Diablo Canyon Power - Notification of NRC Triennial Heat Sink Performance Inspection
ML13206A189
Person / Time
Site: Diablo Canyon  Pacific Gas & Electric icon.png
Issue date: 07/25/2013
From: Thomas Farnholtz
Region 4 Engineering Branch 1
To: Halpin E D
Pacific Gas & Electric Co
References
IR-13-004
Download: ML13206A189 (6)
v • d • e


See also: IR 05000275/2013004

Text

July 25, 2013 Mr. Edward D. Halpin Senior Vice President and

Chief Nuclear Officer

Pacific Gas and Electric Company

Diablo Canyon Power Plant

P.O. Box 56, Mail Code 104/6

Avila Beach, CA 93424 SUBJECT: DIABLO CANYON POWER PLANT - NOTIFICATION OF NRC TRIENNIAL HEAT SINK PERFORMANCE INSPECTION (05000275/2013004 AND 05000323/2013004) AND REQUEST FOR INFORMATION

Dear Mr. Halpin

The purpose of this letter is to notify you that U.S. Nuclear Regulatory Commission Region IV staff will conduct a triennial heat sink performance inspection at your Diablo Canyon Power Plant. The inspection will be comprised of two reactor inspectors from the NRC Region IV office. The inspection will be conducted in accordance with NRC Inspection Procedure

71111.07, "Heat Sink Performance." The schedule for the inspection is as follows:

Onsite Inspection Dates: September 9 - 12, 2013 Experience has shown that this inspection is resource intensive both for the NRC inspectors and your staff. In order to minimize the impact to your onsite resources and to ensure a productive inspection, we have enclosed a request for documents needed for this inspection.

Please note that the documents are requested to be provided by August 26, 2013. We request, that during the onsite inspection week, you ensure that copies of analyses, evaluations, or

documentation regarding the implementation and maintenance of your heat exchanger program are available. Of specific interest are those documents that establish that your heat exchanger program satisfies NRC regulatory requirements and conforms to applicable NRC guidance. Also, appropriate personnel knowledgeable of safety-related heat exchangers should be

available to support the inspector at the site during the inspection.

UNITED STATESNUCLEAR REGULATORY COMMISSIONREGION IV1600 EAST LAMAR BLVDARLINGTON, TEXAS 76011-4511

E. Halpin - 2 - We have discussed the schedule for this inspection activity with your staff and understand that our regulatory contact for this inspection will be Mike McCoy of your licensing organization. If

there are any questions about this inspection or the material requested, please contact the

inspectors, Wayne Sifre, at 817-200-1193 or by e-mail at Wayne.Sifre@nrc.gov, or Christie Hale at 650-479-5434 or e-mail at Christie.Hale@nrc.gov.

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). ADAMS is accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room). Sincerely,

/RA/ Thomas R. Farnholtz, Chief

Engineering Branch 1 Division of Reactor Safety

Docket Nos.: 05000275, 05000323

License Nos.: DPR-80; DPR-82

Enclosure: Triennial Heat Sink Performance Inspection Request for Information

cc: Electronic Distribution for Diablo Canyon Power Plant

E. Halpin - 3 -

ADAMS ACCESSION NUMBER: ML13206A189 SUNSI Review Complete Initials: WCS Non-Sensitive Sensitive Publicly Available Non-Publicly Available SRI:EB1 RI:EB1 C:EB1 WSifre CHale TFarnholtz /RA/ /RA/ /RA/ 7/24/13 7/25/13 7/25/13 OFFICIAL RECORD COPY

- 1 - Enclosure Request for Information Triennial Heat Sink Performance Inspection Diablo Canyon Power Plant

Inspection Report: 05000275/2013004, 05000323/2013004

Inspection Dates: September 9 - 12, 2013

Inspection Procedure: IP 71111.07, Triennial "Heat Sink Performance"

Inspectors: Wayne Sifre, Senior Reactor Inspector

Christie Hale, Reactor Inspector

Information Requested for the In-Office Preparation Week The following information should be sent to the Region IV office in hard copy or electronic

format (Certrec IMS preferred), to the attention of Wayne Sifre, by August 26, 2013. The inspector will select specific items from the information requested below and then request from your staff additional documents needed during the onsite inspection week. Also, we request that you categorize the documents in your response with the numbered list below. Please provide requested documentation electronically if possible. If requested documents are large and only hard copy formats are available, please inform the inspector, and provide subject documentation during the first day of the onsite inspection. If you have any questions regarding this information request, please call the lead inspector as soon as possible.

The following heat exchangers/heat sinks have been selected for inspection:

exchanger cavitation, or heat exchanger testing, in the previous three years 2. System health report(s) and maintenance rule system notebooks for all the Generic Letter 89-13 heat exchangers 3. Copy of any self-assessments done on any Generic Letter 89-13 heat exchangers in the previous three years 4. Copies of any procedures developed to implement the recommendations of Generic Letter 89-13, e.g., the Generic Letter 89-13 Heat Exchanger Program description

5. Copies of any commitments to the Generic Letter 89-13 program

- 2 - Enclosure For the specific heat exchangers selected: Testing Documents 6. Copies of the two most recent completed tests confirming thermal performance for those heat exchangers which are performance tested 7. Instrument uncertainties of the instruments used during testing 8. 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 9. Documents that show the as-found results are recorded, evaluated, and appropriately dispositioned such that the as-left condition is acceptable Cleaning Documents 10. The cleaning and inspection maintenance schedule for each heat exchanger for the next five years 11. Copy of the document describing the inspection results for the last two cleaning and inspection activities completed on each heat exchanger 12. Cleaning procedures with acceptance criteria for the selected heat exchangers 13. 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 14. Copies of those documents that describe the methods taken to control water chemistry in the heat exchangers Design Documents 15. Copies of the design basis documents and updated final safety analysis report pages for the selected heat exchangers 16. Provide a list of calculations with a description which currently apply to each heat exchanger 17. Copies of vendor data sheets and design basis data for the selected heat exchangers 18. 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 19. 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) 20. Copy of the calculations or documents which evaluate the potential for water hammer or excessive tube vibration in the heat exchanger or associated piping

- 3 - Enclosure 21. 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 22. Copy of the document establishing the repair criteria (plugging limit) for degraded tubes which are identified in each heat exchanger For the ultimate heat sink or safety-related service water system: 23. Dam inspections that monitor the integrity of the ultimate heat sink (if applicable) 24. Copies of calculations and surveillances that determine the ultimate heat sink reservoir capacity and heat transfer capability (if applicable) 25. Copies of any design changes performed on the ultimate heat sink or safety-related service water system 26. Copies of procedures for a loss of ultimate heat sink or safety-related service water system 27. Copies of inspections and/or maintenance related to macrofouling (silt, mussel shells, debris, etc.) and aquatic life 28. Copies of inspections and/or maintenance related to preventing biotic fouling 29. 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 nonsafety related section 30. Copy of the most recent service water flow balance test results, both as-found and as-left 31. History of any thru-wall pipe leaks on the safety-related service water system

Inspector Contact Information:

Wayne C. Sifre Christie Hale Senior Reactor Inspector Reactor Inspector

817-200-1193 650-479-5434 Wayne.Sifre@nrc.gov Christie.Hale@nrc.gov

Mailing Address:

U.S. NRC, Region IV Attn: Wayne C. Sifre 1600 East Lamar Blvd.

Arlington, TX 76011-4511

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