ML17101A695

Emergency Core Cooling System (ECCS) Performance Evaluation Models, 10 CFR 50.46Ca)(3)(ii) Annual Report for Calendar Year 2016

ML17101A695
Person / Time
Site:	Palo Verde
Issue date:	04/06/2017
From:	Weber T Arizona Public Service Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
102-07474-TNW/MDD
Download: ML17101A695 (15)

Text

10 CFR 50.46(a)(3)(ii)

Oaps Palo Verde Nuclear Generating Station 5871 S. Wintersburg Road 102-07474-TNW/MDD Tonopah, AZ 85354 April 6, 2017 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Units 1, 2, and 3 Docket Nos. STN 50-528/529/530 Emergency Core Cooiing System (ECCS) Performance Evaiuation Modeis, 10 CFR 50.46Ca)(3)(ii) Annuai Report for Caiendar Year 2016 Pursuant to 10 CFR 50.46(a)(3)(ii), Arizona Public Service Company (APS) is providing a summary of the cumulative effects on calculated peak cladding temperature (PCT) for PVNGS due to changes or errors in ECCS performance evaluation models.

There were no changes or errors that affected PCT in either the large break loss of coolant accident (LOCA) or the small break LOCA calculations for PVNGS Units 1, 2 and 3 for calendar year 2016. Additionally, because PCT is not calculated as part of the post LOCA long-term cooling (LTC) analysis, there are no changes or errors in the LTC models that affect PCT.

The enclosures provide a more detailed discussion of the absolute PCT effects in the Westinghouse (formerly Combustion Engineering) models for pressurized water reactors ECCS performance analyses in calendar year 2016 for PVNGS.

No commitments are being made to the NRC by this letter. Should you need further information regarding this submittal, please contact Michael D. DiLorenzo, Licensing Section Leader, at (623) 393-3495.

Sincerely, Weber, Digitally signed by Weber, Thomas N(Z00499)

Thomas DN: cn=Weber, Thomas N(Z00499)

Reason; I am approving this document N(Z00499) Date: 2017.04,06 15:52:09-07'00 Thomas N. Weber Department Leader, Regulatory Affairs TNW/MDD/CJS A member of the STARS Alliance LLC Callaway

• Diablo Canyon

• Palo Verde

• Wolf Creek

102-07474-TNW/MDD ATTN: Document Control Desk U. S. Nuclear Regulatory Commission ECCS Performance Evaluation Models, 10 CFR 50.46(a)(3)(ii) Annual Report for 2016 Page 2 : Summary of Cumulative Effects on Calculated Peak Clad Temperature (PCT) for PVNGS Due to Changes/Errors in Emergency Core Cooling System (ECCS) Performance Evaluation Models : Westinghouse Electric Company Letter, Palo Verde Nuclear Generating Station Units 1, 2, and 3, 10 CFR 50.46 Annual Notification and Reporting for 2016, letter number LTR-SATH-17-005, dated March 21, 2017 cc:

K. M. Kennedy NRC Region IV Regional Administrator S. P. Lingam NRC NRR Project Manager for PVNGS M. M. Watford NRC NRR Project Manager C. A. Peabody NRC Senior Resident Inspector for PVNGS

Enclosure 1 Summary of Cumulative Effects on Calculated Peak Clad Temperature (PCT) for PVNGS Due to Changes/Errors in Emergency Core Cooling System (ECCS) Performance Evaluation Models

Enclosure 1 Summary of Cumulative Effects on Calculated PCT for PVNGS Due to Changes/Errors in ECCS Performance Evaluation Models Table Large Break LOCA Margin Summary Sheet for 2016 Plant Name: Palo Verde Nuclear Generating Station Units 1, 2, and 3 Utility Name: Arizona Public Service Company (APS)

Evaluation Model: Westinghouse (formerly Combustion Engineering) 1999 EM Peak Clad Temperature: 2106 °F (analysis of record reported in PVNGS UFSAR Section 6.3.3)

Net PCT Absolute PCT Effect Effect Cumulative 10 CFR 50.46 Changes and O o LL A. APCT = 0 °F Error Corrections - Previously Reported B. 10 CFR 50.46 Changes and Error Corrections - New for CY 2016

1. None Identified for Units 1, 2 and 3 APCT = -H 0 °F + 0 °F C. Absolute Sum of Cumulative 10 CFR 50.46 APCT = -F 0 °F Changes and Error Corrections D. Licensing Basis PCT (Reported in UFSAR) 2106 °F

+ Cumulative PCT Assessments (Changes and Error Corrections)

Note: PVNGS reanalyzed the Large Break LOCA event with an NRC approved Evaluation Model in 2009, as reported in Letter No. 102-06113, 30-Day Report Pursuant to 10 CFR 50.46(a)(3)(H) and Submittal of Large Break Loss of Coolant Accident Reanalysis Results, dated December 22, 2009 (NRC ADAMS Accession No. ML100040066). The reanalysis incorporated and corrected previously identified changes and errors, resetting the cumulative changes and error corrections that had previously been reported through the end of CY 2008 (NRC ADAMS Accession No. ML091810703).

The sum of the PCT from the most recent analysis of record (AOR) using an acceptable evaluation model, and the estimated cumulative effects of PCT impacts for changes and error corrections made since that AOR, remains less than 2200 F.

Enclosure 1 Summary of Cumulative Effects on Calculated PCT for PVNGS Due to Changes/Errors in ECCS Performance Evaluation Models Table 2: Small Break LOCA Margin Summary Sheet for 2016 Plant Name: Palo Verde Nuclear Generating Station Units 1, 2, and 3 Utility Name: Arizona Public Service Company (APS)

Evaluation Model: Westinghouse (formerly Combustion Engineering) S2M Peak Clad Temperature: 1618F (analysis of record reported in PVNGS UFSAR Section 6.3.3)

Net PCT Absolute PCT Effect Effect A. Cumulative 10 CFR 50.46 Changes and APCT = + 0 F + 0 °F Error Corrections - Previously Reported B. 10 CFR 50.46 Changes and Error Corrections - New for CY 2016

1. None Identified APCT = + 0 °F + 0 °F C. Absolute Sum of Cumulative 10 CFR 50.46 APCT = + 0 °F Changes and Error Corrections D. Licensing Basis PCT (Reported in UFSAR) + 1618 °F and Error Corrections)

The sum of the PCT from the most recent AOR using an acceptable evaluation model, and the estimated cumulative effects of PCT impacts for changes and error corrections made since that AOR, remains less than 2200 °F.

Enclosure 2 Westinghouse Electric Company Letter, Palo Verde Nuclear Generating Station Units 1, 2, and 3, 10 CFR 50.46 Annual Notification and Reporting for 2016, letter number LTR-SATH-17-005, dated March 21, 2017

Westing house Non-Proprietary Class 3 Westinghouse Electric Company 20 International Drive Windsor, Connecticut 06095 Westinghouse USA Direct tel: (860)731-6426 e-mail: atkinsdw@westinghouse.com Our ref: LTR-SATH-17-005, Rev.O March 21,2017 Palo Verde Nuclear Generating Station Units 1, 2, and 3 10 CFR 50.46 Annual Notification and Reporting for 2016 Dear Sir or Madam; This letter provides 10 CFR 50.46 reporting information pertaining to the Westinghouse Electric Company emergency core cooling system (ECCS) performance evaluation models (EMs) and their application to your plants for calendar year 2016.

There were no 2016 changes, error corrections, or enhancements to the 1999 EM, which is the EM used in your plants' large break loss of coolant accident (LBLOCA) ECCS performance analysis. Additionally, there were no 2016 changes, error corrections, or enhancements to the Supplement 2 evaluation model (S2M), which is the EM used in your plants small break loss of coolant accident (SBLOCA) ECCS performance analysis.

The peak cladding temperature (PCT) rackup sheets, along with your plants specific evaluation text, are enclosed in the attachment. The rackup sheets identify the PCTs of the ECCS performance analyses of record (AOR) for your plants and the PCT assessments associated with the AOR through the end of calendar year 2016. There are no PCT changes on the Units 1, 2 and 3 LBLOCA AOR and Units 1, 2 and 3 SBLOCA AORs for 2016.

There was a cumulative sum of the absolute magnitudes of PCT changes of 4 °F for the Unit 3 Cycle 18 LBLOCA AOR operation for 2015 due to inclusion of NGF LUAs. Cycle 19 also operated during 2015 and 2016 without the inclusion of NGF LUAs and therefore does not have the cumulative sum of the absolute magnitudes of PCT changes of 4 °F. Therefore, the LBLOCA cumulative sum for all three units is 0 °F and the SBLOCA cumulative sum for all three units is 0 °F.

This letter is provided for your use in making a determination relative to the reporting requirements of 10 CFR 50.46. The information provided in this letter was prepared in accordance with Westinghouse's Quality Management System.

• Electronically approved records are authenticated in the electronic document management system.

© 2017 Westinghouse Electric Company LLC All Rights Reserved

Westinghouse Non-Proprietary Class 3 LTR-SATH-17-005, Rev. 0 Page 2 of 2 March 21,2017 Author: (Electronically Approved)

• Verifier: (Electronically Approved)

• Douglas W. Atkins Patrick R. Kottas Setpoints and Advanced SATH Thermal Hydraulics (SATH)

Approved: (Electronically Approved)

• John Ghergurovich Manager, SATH RACKUP SharePoint Check:

EMs applicable to Palo Verde Nuclear Generating Station Units 1, 2, and 3:

Appendix K Small Break - S2M Appendix K Large Break - 1999 EM Transmittal Letter Issue Description None N/A

Westinghouse Non-Proprietary Class 3 Attachment to LTR-SATH-17-005 Rev. 0 Page 1 of 7 March 21, 2017

Attachment:

LBLOCA and SBLOCA Backup Sheets

Westinghouse Non-Proprietary Class 3 Attachment to LTR-SATH-17-005 Rev. 0 Page 2 of 7 March 21, 2017 Westinghouse LOCA Peak Clad Temperature Summary for Appendix K Large Break Plant Name: Palo Verde Nuclear Generating Station Unit 1 Utility Name: Arizona Public Service Revision Date: 3/2/2017 Analysis Information EM: 1999 EM Analysis Date: 8/31/2009 Limiting Break Size: 0.6 DEG/PD Fuel: 16x16 System 80 SGTP(%): 10 PLHGR 13.1 Notes: 1. Plant Configuration: Rated Core Power = 3990 MWt, Replacement Steam Generators.

2. Fuel Design: 16x16 System 80 with ZIRLO^'^ cladding, value-added pellets, and erbia burnable absorbers.

Clad Temp (°F) Ref. Notes LICENSING BASIS Analysis-Of-Record PCT 2106 PCT ASSESSMENTS (Delta PCT)

A. PRIOR ECCS MODEL ASSESSMENTS 1, None B. PLANNED PLANT MODIFICATION EVALUATIONS

1. None C. 2016 ECCS MODEL ASSESSMENTS 1 None D. OTHER*

I None LICENSING BASIS PCT + PCT ASSESSMENTS PCT 2106

• It is recommended that the licensee determine if these PCT allocations should be considered with respect to 10 CFR 50 46 reporting requirements

References:

1 CVER-09-62, "Analyis of Record for Large Break LOCA ECCS Perfonnance Analysis Including Replacement Steam Generators and Simplified Head Implementation for PVNGS Units 1,2, and 3," August 2009 Notes:

None

Westinghouse Non-Proprietary Class 3 Attachment to LTR-SATH-17-005 Rev. 0 Page 3 of 7 March 21, 2017 Westinghouse LOCA Peak Clad Temperature Summary for Appendix K Small Break Plant Name: Palo Verde Nuclear Generating Station Unit 1 Utility Name: Arizona Public Service Revision Date: 3/2/2017 Analysis Information EM: S2M Analysis Date: 3/22/2002 Limiting Break Size: 0.05 sq ft/PD Fuel: 16x16 System 80 SGTP(%): 10 PLHGR 13.5 Notes: 1. Plant Configuration: Rated Core Power = 3990 MWt, Replacement Steam Generators.

2. Fuel Design: 16x16 System 80 with ZIRLO'^ cladding, value-added pellets, and erbia burnable absorbers.

Clad Temp (°F) Ref. Notes LICENSING BASIS Analysis-Of-Record PCT 1618 PCT ASSESSMENTS (Delta PCT)

A. PRIOR ECCS MODEL ASSESSMENTS I, None B. PLANNED PLANT MODIFICATION EVALUATIONS I. None C. 2016 ECCS MODEL ASSESSMENTS 1 None D. OTHER*

I None LICENSING BASIS PCT + PCT ASSESSMENTS PCT = 1618 It is recommended that the licensee determine if these PCT allocations should be considered with respect to 10 CFR 50,46 reporting requirements.

References:

1. A-PV-FE-0149, Rev 001, Palo Verde Units 1, 2 and 3 S2M Bounding SBLOCA ECCS Performance Analysis, March 2002 Notes:

None

Westinghouse Non-Proprietary Class 3 Attachment to LTR-SATH-17-005 Rev. 0 Page 4 of 7 March 21,2017 Westinghouse LOCA Peak Clad Temperature Summary for Appendix K Large Break Plant Name: Palo Verde Nuclear Generating Station Unit 2 Utility Name: Arizona Public Service Revision Date: 3/2/2017 Analysis Information EM: 1999 EM Analysis Date: 8/31/2009 Limiting Break Size: 0.6 DEG/PD Fuel: 16x16 System 80 SGTP(%): 10 PLHGR 13.1 Notes: 1. Plant Configuration: Rated Core Power = 3990 M Wt, Replacement Steam Generators.

2. Fuel Design; 16x16 System 80 with ZIRLO' cladding, value-added pellets, and erbia burnable absorbers.

Clad Temp (°F) Ref. Notes LICENSING BASIS Analysis-Of-Record PCT 2106 PCT ASSESSMENTS (Delta PCT)

A. PRIOR ECCS MODEL ASSESSMENTS I. None B. PLANNED PLANT MODIFICATION EVALUATIONS I None C. 2016 ECCS MODEL ASSESSMENTS I None D. OTHER*

I None LICENSING BASIS PCT + PCT ASSESSMENTS PCT 2106 It is recommended that the I icensee determine if these PCT allocations should be considered with respect to 10 CFR 50 46 reporting requirements.

References:

1 CVER-09-62. "Analysis of Record for Large Break LOCA ECCS Performance Analysis Including Replacement Steam Generators and Simplified Head Implementation for PVNGS Units 1.2, and 3," August 2009 Notes:

None

Westinghouse Non-Proprietary Class 3 Attachment to LTR-SATH-17-005 Rev. 0 Page 5 of 7 March 21, 2017 Westinghouse LOCA Peak Clad Temperature Summary for Appendix K Small Break Plant Name: Palo Verde Nuclear Generating Station Unit 2 Utility Name: Arizona Public Service Revision Date: 3/2/2017 Analysis Information EM: S2M Analysis Date: 3/22/2002 Limiting Break Size: 0.05 sq ft/PD Fuel: 16x16 System 80 SGTP(%): 10 PLHGR 13.5 Notes: 1. Plant Configuration: Rated Core Power = 3990 MWt, Replacement Steam Generators.

2. Fuel Design: 16x16 System 80 with ZIRLOr cladding, value-added pellets, and erbia burnable absorbers.

Clad Temp (°F) Ref. Notes LICENSING BASIS Analysis-Of-Record PCT 1618 PCT ASSESSMENTS (Delta PCT)

A. PRIOR ECCS MODEL ASSESSMENTS

1. None B. PLANNED PLANT MODIFICATION EVALUATIONS I None C. 2016 ECCS MODEL ASSESSMENTS 1 None D. OTHER*

1 None LICENSING BASIS PCT + PCT ASSESSMENTS PCT 1618 It is recommended that the licensee determine If these PCT allocations should be considered with respect to 10 CFR 50.46 reporting requirements

References:

I. A-PV-FE-0149, Rev. 001, Palo Verde Units 1,2 and 3 S2M Bounding SBLOCA ECCS Performance Analysis, March 2002 Notes:

None

Westinghouse Non-Proprietary Class 3 Attachment to LTR-SATH-17-005 Rev. 0 Page 6 of 7 March 21, 2017 Westinghouse LOCA Peak Clad Temperature Summary for Appendix K Large Break Plant Name: Palo Verde Nuclear Generating Station Unit 3 Utility Name: Arizona Public Service Revision Date: 3/2/2017 Analysis Information EM: 1999 EM Analysis Date: 8/31/2009 Limiting Break Size: 0.6 DEG/PD Fuel: 16x16 System 80 SGTP(%): 10 PLHGR 13.1 Notes: 1. Plant Configuration: Rated Core Power = 3990 MWt, Replacement Steam Generators.

2. Fuel Design: 16x16 System 80 with ZIRLO'^ cladding, value-added pellets, and erbia burnable absorbers.

Clad Temp (°F) Ref. Notes LICENSING BASIS Analysis-Of-Record PCT 2106 PCT ASSESSMENTS (Delta PCT)

A. PRIOR ECCS MODEL ASSESSMENTS I None B, PLANNED PLANT MODIFICATION EVALUATIONS I. None C. 2016 ECCS MODEL ASSESSMENTS I None D. OTHER*

1 None LICENSING BASIS PCT + PCT ASSESSMENTS PCT 2106

• It is recommended that the licensee determine if these PCT allocations should be considered with respect to 10 CFR 50,46 reporting requirements

References:

I CVER-09-62, Analysis of Record for Large Break LOCA ECCS Performance Analysis including Replacement Steam Generators and Simplified Head Implementation for PVNGS Units 1,2. and 3." August 2009 Notes:

None

Westinghouse Non-Proprietary Class 3 Attachment to LTR-SATH-17-005 Rev. 0 Page 7 of 7 March 21,2017 Westinghouse LOCA Peak Clad Temperature Summary for Appendix K Small Break Plant Name: Palo Verde Nuclear Generating Station Unit 3 Utility Name: Arizona Public Service Revision Date: 3/2/2017 Analysis Information EiM: S2M Analysis Date: 3/22/2002 Limiting Break Size: 0.05 sq ft/PD Fuel: 16x16 System 80 SGTP(%): 10 PLHGR 13.5 Notes: 1. Plant Configuration; Rated Core Power = 3990 MWt, Replacement Steam Generators.

2. Fuel Design: 16x16 System 80 with ZIRLC^^ cladding, value-added pellets, and erbia burnable absorbers.

Clad Temp (°F) Ref. Notes LICENSING BASIS Analysis-Of-Record PCT 1618 PCT ASSESSMENTS (Delta PCT)

A. PRIOR ECCS MODEL ASSESSMENTS 1 None B. PLANNED PLANT MODIFICATION EVALUATIONS I None C. 2016 ECCS MODEL ASSESSMENTS I. None D. OTHER*

1 None LICENSING BASIS PCT + PCT ASSESSMENTS PCT = 1618 It is recommended that the licensee determine if these PCT allocations should be considered with respect to 10 CFR 50 46 reporting requirements

References:

I. A-PV-FE-0149,Rev 001. "Palo Verde Units l,2,and3S2M Bounding SBLOCA ECCS Performance Analysis," March 2002.

Notes:

None