ML14112A436

Submittal of Emergency Core Cooling System (ECCS) Performance Evaluation Models, 10 CFR 50.46(a)(3)(ii) Annual Report for Calendar Year 2013

ML14112A436
Person / Time
Site:	Palo Verde
Issue date:	04/08/2014
From:	Weber T Arizona Public Service Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
102-06860-TNW/DHK
Download: ML14112A436 (17)

Text

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

Qaps Palo Verde Nuclear Generating Station 5801 S. Wintersburg Road 102-06860-TNW/DHK Tonopah, AZ 85354 April 8, 2014 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 Cooling System (ECCS) Performance Evaluation Models, 10 CFR 50.46(a)(3)(ii) Annual Report for Calendar Year 2013 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 clad temperature (PCT) for PVNGS due to changes or errors in ECCS performance evaluation models.

There were no changes that affected the large break loss of coolant accident (LOCA) or small break LOCA peak clad temperature (PCT) calculations for PVNGS Units 2 or 3 for calendar year (CY) 2013. There were no errors identified for 2013 that affected the large break LOCA or the small break LOCA calculations for each of the PVNGS units.

For Unit 1, the eight AREVA lead test assemblies were removed for operating cycle 18, during 2013. The 4 degree change to PCT that was added for these assemblies was removed, as Unit 1 has been restored to the configuration assumed in the large break LOCA analysis. There were no changes that affected the small break LOCA PCT calculations for Unit 1.

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.

A member of the STARS (Strategic Teaming and Resource Sharing) Alliance (7 Callaway

• Comanche Peak

• Diablo Canyon

• Palo Verde

• Wolf Creek

ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Emergency Core Cooling System (ECCS) Performance Evaluation Models 10 CFR 50.46(a)(3)(ii) Annual Report for Calendar Year 2013 Page 2 The enclosures provide a more detailed discussion of the LOCA analyses in the Westinghouse (formerly Combustion Engineering) models for Pressurized Water Reactors (PWRs) ECCS performance analyses in calendar year 2013 for PVNGS.

No commitments are being made to the NRC by this letter.

Should you need further information regarding this submittal, please contact David H. Kelsey, Licensing Section Leader, at (623) 393-5730.

Sincerely,

/1 Lb 3 (W- k 1, 4.

Thomas N. Weber Department Leader, Regulatory Affairs TNW/DHK/hsc : 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 GeneratingStation Units 1, 2, and 3, 10 CFR 50.46 Annual Notification and Reporting for 2013, letter number LTR-TLA 010, dated March 19, 2014 cc:

M. L. Dapas NRC Region IV Regional Administrator J. K. Rankin NRC NRR Project Manager for PVNGS (electronic and hard copy)

A. E. George NRC NRR Project Manager (electronic and hard copy)

M. A. Brown 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 1: Large Break LOCA Margin Summary Sheet for 2013 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 OF (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 = + 4 OF (Units + 4 OF (Units 1 Error Corrections - Previously Reported (a) 1 and 3 Only) and 3 Only)

B. 10 CFR 50.46 Changes and Error Corrections - New for CY 2013

1. None Identified for Units 2 or 3 APCT = + 0 OF (Units

• 0 OF (Units 2 2 and 3 Only) and 3 Only)

2. Removal of eight AREVA Lead Test APCT = - 4 OF (Unit 1 + 0 OF (Unit 1 Assemblies (Unit 1 Only) (b) Only) Only) (b)

C. Absolute Sum of Cumulative 10 CFR 50.46 APCT = + 0 OF (Units 1 Changes and Error Corrections and 2)

+ 4 OF (Unit 3)

D. Licensing Basis PCT (Reported in UFSAR) 2106 OF (Units 1

+ Cumulative PCT Assessments (Changes and 2) and Error Corrections) 2110 OF (Unit 3)

Notes: (a) 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 Pursuantto 10 CFR 50.46(a)(3)(ii) 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).

(b) With the removal of the eight AREVA Lead Test Assemblies from Unit 1, there is no need to track the assumed + 4 OF net PCT effect as a change to the analysis of record, as Unit 1 has been restored to the configuration assumed. This was specifically addressed in the aforementioned APS letter, dated December 22, 2009.

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 OF.

1

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 2013 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: 1618OF (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 = + 0OF

• 0 OF Error Corrections - Previously Reported B. 10 CFR 50.46 Changes and Error Corrections - New for CY 2013 + 0 OF

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

2

Enclosure 2 Westinghouse Electric Company Letter, Palo Verde Nuclear GeneratingStation Units 1, 2, and 3, 10 CFR 50.46 Annual Notification and Reporting for 2013, letter number LTR-TLA-14-010, dated March 19, 2014

Westinghouse Non-Proprietary Class 3 e Westinghouse Westinghouse Electric Company Nuclear Services 20 International Drive Windsor, Connecticut 06095 USA Direct tel: (860) 731-6508 Direct fax: (860) 731-4528 e-mail: parikha@westinghouse.com Our ref: LTR-TLA-14-010, Rev.0 March 19, 2014 Palo Verde Nuclear Generating Station Units 1, 2, and 3 10 CFR 50.46 Annual Notification and Reporting for 2013

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 2013.

There were no 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 in calendar year 2013.

Additionally, there were no 2013 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, which were obtained from the Westinghouse 10 CFR 50.46 rackup database, 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 2013.

There were no changes to or errors found in the 1999 LBLOCA Evaluation Model in calendar year 2013.

There were no changes to or errors found in the S2M SBLOCA Evaluation Model in calendar year 2013.

There is a cumulative sum of the absolute magnitudes of PCT changes of 4 OF for the Unit 1 LBLOCA AOR Cycle 17 operation for 2013.

There is a cumulative sum of the absolute magnitudes of PCT changes of 4 OF for the Unit 3 LBLOCA AOR operation for 2013.

There are no PCT changes on the Unit 1 LBLOCA AOR Cycle 18 operation, Unit 2 LBLOCA AOR, and Units 1, 2 and 3 SBLOCA AORs for 2013.

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.

© 2014 Westinghouse Electric Company LLC All Rights Reserved

Westinghouse Non-Proprietary Class 3 LTR-TLA-1 4-010 Page 2 of 3 March 19, 2014 Author: (Electronically Approved)* Verifier: (Electronically Approved)*

Ajal J. Parikh Douglas W. Atkins Transient & LOCA Analysis Transient & LOCA Analysis Approved: (Electronically Approved)*

Patrick R. Kottas for John Ghergurovich Manager, Transient & LOCA Analysis

• Electronicallyapproved records are authenticatedin the electronic document management system.

Westinghouse Non-Proprietary Class 3 LTR-TLA-14-010 Page 3 of 3 March 19, 2014 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 2013 Issues Transmittal Letter Issue Description None N/A

Westinghouse Non-Proprietary Class 3 Attachment to LTR-TLA-14-010 Page 1 of 8 March 19, 2014

Attachment:

LBLOCA and SBLOCA Rackup Sheets

Westinghouse LOCA Peak Clad Temperature Summary for Appendix K Large Break Plant Name: Palo Verde Nuclear Generating Station Unit 1 Cycle 17 Utility Name: Arizona Public Service Revision Date: 2/19/20 14 Analysis Information EM: 1999 EM Analysis Date: 8/31/2009 Limiting Break Size: 0.6 DEG/PD Fuel: 16x16 System 80 SGTP (%): 10 PLHGR (kW/ft): 13.1 Notes: 1. Plant Configuration: Rated Core Power = 3990 MWt, Replacement Steam Generators.

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

Clad Temp (0 F) Ref. Notes LICENSING BASIS Analysis-Of-Record PCT 2106 1 PCT ASSESSMENTS (Delta PCT)

A. PRIOR ECCS MODEL ASSESSMENTS I Evaluation for the Insertion of 8 AREVA LTAs into Palo Verde 4 2 B. PLANNED PLANT MODIFICATION EVALUATIONS I None 0 C. 2013 ECCS MODEL ASSESSMENTS I None 0 D. OTHER*

I None 0 LICENSING BASIS PCT + PCT ASSESSMENTS PCT = 2110

• 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, "Analyis 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.

2 . LTR-OA-08-106, "10 CFR 50.46 Report for PVNGS Units 1,2, and 3 for an Evaluation for the Insertion of 8 AREVA LTAs and the Correction of an Error in the Steam Generator Economizer Input," December 2008.

Notes:

None

Westinghouse LOCA Peak Clad Temperature Summary for Appendix K Large Break Plant Name: Palo Verde Nuclear Generating Station Unit I C ycle 18 Utility Name: Arizona Public Service Revision Date: 2/19/2014 Analysis Information EM: 1999 EM Analysis Date: 8/31/2009 Limiting Break Size: 0.6 DEG/PD Fuel: 16x16 System 80 SGTP (%): 10 PLHGR (kW/ft): 13.1 Notes: 1. Plant Configuration: Rated Core Power = 3990 MWt, Replacement Steam Generators.

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

Clad Temp (OF) Ref. Notes LICENSING BASIS Analysis-Of-Record PCT 2106 1 PCT ASSESSMENTS (Delta PCT)

A. PRIOR ECCS MODEL ASSESSMENTS

1. None 0 B. PLANNED PLANT MODIFICATION EVALUATIONS 1 None 0 C. 2013 ECCS MODEL ASSESSMENTS I. None 0 D. OTHER*

I. None 0 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 Performance Analysis Including Replacement Steam Generators and Simplified Head Implementation for PVNGS Units 1,2,and 3," August 2009.

Notes:

None

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: 2/19/2014 Analysis Information EM: S2M Analysis Date: 3/22/2002 Limiting Break Size: 0.05 sq ft/PD Fuel: 16x16 System 80 SGTP (%): 10 PLHGR (kW/ft): 13.5 Notes: 1. Plant Configuration: Rated Core Power = 3990 MWt, Replacement Steam Generators.

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

Clad Temp (IF) Ref. Notes LICENSING BASIS Analysis-Of-Record PCT 1618 1 PCT ASSESSMENTS (Delta PCT)

A. PRIOR ECCS MODEL ASSESSMENTS I. None 0 B. PLANNED PLANT MODIFICATION EVALUATIONS I. None 0 C. 2013 ECCS MODEL ASSESSMENTS I None 0 D. OTHER*

I None 0 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 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: 2/19/2014 Analysis Information EM: 1999 EM Analysis Date: 8/31/2009 Limiting Break Size: 0.6 DEG/PD Fuel: 16x16 System 80 SGTP (%): 10 PLHGR (kW/ft): 13.1 Notes: I. Plant Configuration: Rated Core Power = 3990 MWt, Replacement Steam Generators.

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

Clad Temp (IF) Ref. Notes LICENSING BASIS Analysis-Of-Record PCT 2106 1 PCT ASSESSMENTS (Delta PCT)

A. PRIOR ECCS MODEL ASSESSMENTS I . None 0 B. PLANNED PLANT MODIFICATION EVALUATIONS

1. None 0 C. 2013 ECCS MODEL ASSESSMENTS

1. None 0 D. OTHER*

I. None 0 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 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: 2/19/2014 Analysis Information EM: S2M Analysis Date: 3/22/2002 Limiting Break Size: 0.05 sq ft/PD Fuel: 16x16 System 80 SGTP (%): 10 PLHGR (kW/ft): 13.5 Notes: I. Plant Configuration: Rated Core Power = 3990 MWt, Replacement Steam Generators.

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

Clad Temp (IF) Ref. Notes LICENSING BASIS Analysis-Of-Record PCT 1618 1 PCT ASSESSMENTS (Delta PCT)

A. PRIOR ECCS MODEL ASSESSMENTS

1. None 0 B. PLANNED PLANT MODIFICATION EVALUATIONS I None 0 C. 2013 ECCS MODEL ASSESSMENTS I None 0 D. OTHER*

I. None 0 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 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: 2/19/2014 Analysis Information EM: 1999 EM Analysis Date: 8/31/2009 Limiting Break Size: 0.6 DEG/PD Fuel: 16x16 System 80 SGTP (%): 10 PLHGR (kW/ft): 13.1 Notes: 1. Plant Configuration: Rated Core Power = 3990 MWt, Replacement Steam Generators.

2. Fuel Design: 16xl6 System 80 with ZIRLO TM cladding, value-added pellets, and erbia burnable absorbers.

Clad Temp (IF) Ref. Notes LICENSING BASIS Analysis-Of-Record PCT 2106 1 PCT ASSESSMENTS (Delta PCT)

A. PRIOR ECCS MODEL ASSESSMENTS I Evaluation for the insertion of up to 8 NGF LUAs 4 2 B. PLANNED PLANT MODIFICATION EVALUATIONS I None 0 C. 2013 ECCS MODEL ASSESSMENTS 1 None 0 D. OTHER*

I None 0 LICENSING BASIS PCT + PCT ASSESSMENTS PCT = 2110

• 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.

2 . WCAP-17188-P, Rev. 2, "Palo Verde NGF LUA Engineering Report," March 2011.

Notes:

None

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: 2/19/2014 Analysis Information EM: S2M Analysis Date: 3/22/2002 Limiting Break Size: 0.05 sq ft/PD Fuel: 16x16 System 80 SGTP (%): 10 PLHGR (kW/ft): 13.5 Notes: 1. Plant Configuration: Rated Core Power = 3990 MWt, Replacement Steam Generators.

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

Clad Temp (IF) Ref. Notes LICENSING BASIS Analysis-Of-Record PCT 1618 1 PCT ASSESSMENTS (Delta PCT)

A. PRIOR ECCS MODEL ASSESSMENTS I . None 0 B. PLANNED PLANT MODIFICATION EVALUATIONS 1 None 0 C. 2013 ECCS MODEL ASSESSMENTS

1. None 0 D. OTHER*

I. None 0 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