NRC 2016-0010, Submittal of 10 CFR 50.46 Annual Report

Submittal of 10 CFR 50.46 Annual Report

ML16082A296
Person / Time
Site:	Point Beach
Issue date:	03/22/2016
From:	Woyak B Point Beach
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
NRC 2016-0010
Download: ML16082A296 (4)

Text

March 22, 2016 NRC 2016-0010 10 CFR 50.46(a)(3)(ii)

U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555 Point Beach Nuclear Plant, Units 1 and 2 Dockets 50-266 and 50-301 Renewed License Nos. DPR-24 and DPR-27 10 CFR 50.46 Annual Report In accordance with 10CFR50.46(a)(3)(ii), NextEra Energy Point Beach, LLC (NextEra) is submitting this annual report of changes to emergency core cooling system (ECCS) evaluation models for Point Beach Nuclear Plant (PBNP), Units 1 and 2. This letter provides a summary of ECCS evaluation model changes and errors identified for the Year 2015.

This submittal contains no new commitments or revisions to existing commitments.

Sincerely, NextEra Energy Point Beach, LLC Bryan Woyak Licensing Manager Point Beach Nuclear Plant Enclosure cc: Administrator, Region Ill, USNRC Project Manager, Point Beach Nuclear Plant, USNRC Resident Inspector, Point Beach Nuclear Plant, USNRC NextEra Energy Point Beach, LLC, 6610 Nuclear Road, Two Rivers, WI 54241

ENCLOSURE NEXTERA ENERGY POINT BEACH, LLC POINT BEACH NUCLEAR PLANT, UNITS 1 AND 2 10 CFR 50.46 ANNUAL REPORT This annual report of changes to, and errors discovered in, emergency core cooling system (ECCS) evaluation models for Point Beach Nuclear Plant (PBNP) Units 1 and 2, for the Year 2015, is provided pursuant to 10 CFR 50.46(a)(3)(ii). The report provides a summary of ECCS evaluation model changes and errors identified since the previous annual report (Reference 1). Westinghouse Electric Company is the of record holder for the Point Beach Units 1 and 2 Large Break and Small Break loss of coolant accident (LOCA) analyses. Large Break (LBLOCA) analysis is performed using the Westinghouse Realistic Large Break LOCA Evaluation Model using ASTRUM methodology.

Small Break (SBLOCA) analysis is performed using the Westinghouse Small Break LOCA Evaluation Model with NOTRUMP.

Large Break LOCA Evaluation Model No errors were found in the LBLOCA ECCS performance analysis since the previous annual report (Reference 1). Table 1 provides a summary of Peak Cladding Temperature (PCT) changes for Point Beach Units 1 and 2.

Small Break LOCA Evaluation Model No errors were found in the SBLOCA ECCS performance analysis since the previous annual report (Reference 1). Table 2 provides a summary of PCT changes for Point Beach Units 1 and 2.

Reference:

1. NRC 2015-0021, M. Millen (NextEra Energy) to US NRC Document Control Desk, "Point Beach Nuclear Plant, Units 1 and 2, Dockets 50-266 and 50-301, Renewed License Nos. DPR-24 and DPR-27, 10 CFR 50.46Annual Report," April14, 2015 (ML15104A561).

Page 1 of 3

Table 1 Large Break LOCA Margin Summary Sheet- 2015 Annual Report Plant Name: Point Beach Units 1 and 2 Utility name: NextEra Energy Evaluation Model: Westinghouse Realistic Large Break LOCA Evaluation Model using ASTRUM EvalUation Model PCT (Unit 1/Unit 2):

Net PCT Absolute PCT Effect Effect Unit 1/Unit 2 Unit 1/Unit 2 Prior 10 CFR 50.46 Changes or A ilPCT +21 0°F/+248°F 21 0°F/340°F Error Corrections- up to Year 2014 Prior 10 CFR 50.46 Changes or B ilPCT None None Errors Corrections -Year 2015 10 CFR 50.46 Changes in Year c 2015 Since Item B ilPCT None None Absolute Sum of 10 CFR 50.46 D ilPCT 21 0°F/340°F Changes The sum of the PCT from the most recent analysis using an acceptable evaluation model and the estimates of PCT impact for changes and errors identified since this analysis Page 2 of 3

Table 2 Small Break LOCA Margin Summary Sheet- 2015 Annual Report Plant Name: Point Beach Units 1 and 2 Utility name: NextEra Energy Evaluation Model: Westinghouse Small Break LOCA Evaluation Model with NOTRUMP Evaluation Model PCT (Unit 1/Unit 2):

1. Net PCT Absolute PCT Effect Effect Unit 1/Unit 2 Unit 1/Unit 2 Prior 10 CFR 50.46 Changes or OoF/OoF A ~PCT 0°F/0°F Error Corrections- up to Year 2014 Prior 10 CFR 50.46 Changes or B ~PCT None None Errors Corrections - Year 2015 10 CFR 50.46 Changes in Year c 2015 Since Item B

~PCT None None

~PCT The sum of the PCT from the most recent analysis using an acceptable evaluation model and the estimates of PCT impact for changes and errors identified since this analysis Page 3 of 3

March 22, 2016 NRC 2016-0010 10 CFR 50.46(a)(3)(ii)

U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555 Point Beach Nuclear Plant, Units 1 and 2 Dockets 50-266 and 50-301 Renewed License Nos. DPR-24 and DPR-27 10 CFR 50.46 Annual Report In accordance with 10CFR50.46(a)(3)(ii), NextEra Energy Point Beach, LLC (NextEra) is submitting this annual report of changes to emergency core cooling system (ECCS) evaluation models for Point Beach Nuclear Plant (PBNP), Units 1 and 2. This letter provides a summary of ECCS evaluation model changes and errors identified for the Year 2015.

This submittal contains no new commitments or revisions to existing commitments.

Sincerely, NextEra Energy Point Beach, LLC Bryan Woyak Licensing Manager Point Beach Nuclear Plant Enclosure cc: Administrator, Region Ill, USNRC Project Manager, Point Beach Nuclear Plant, USNRC Resident Inspector, Point Beach Nuclear Plant, USNRC NextEra Energy Point Beach, LLC, 6610 Nuclear Road, Two Rivers, WI 54241

ENCLOSURE NEXTERA ENERGY POINT BEACH, LLC POINT BEACH NUCLEAR PLANT, UNITS 1 AND 2 10 CFR 50.46 ANNUAL REPORT This annual report of changes to, and errors discovered in, emergency core cooling system (ECCS) evaluation models for Point Beach Nuclear Plant (PBNP) Units 1 and 2, for the Year 2015, is provided pursuant to 10 CFR 50.46(a)(3)(ii). The report provides a summary of ECCS evaluation model changes and errors identified since the previous annual report (Reference 1). Westinghouse Electric Company is the of record holder for the Point Beach Units 1 and 2 Large Break and Small Break loss of coolant accident (LOCA) analyses. Large Break (LBLOCA) analysis is performed using the Westinghouse Realistic Large Break LOCA Evaluation Model using ASTRUM methodology.

Small Break (SBLOCA) analysis is performed using the Westinghouse Small Break LOCA Evaluation Model with NOTRUMP.

Large Break LOCA Evaluation Model No errors were found in the LBLOCA ECCS performance analysis since the previous annual report (Reference 1). Table 1 provides a summary of Peak Cladding Temperature (PCT) changes for Point Beach Units 1 and 2.

Small Break LOCA Evaluation Model No errors were found in the SBLOCA ECCS performance analysis since the previous annual report (Reference 1). Table 2 provides a summary of PCT changes for Point Beach Units 1 and 2.

Reference:

1. NRC 2015-0021, M. Millen (NextEra Energy) to US NRC Document Control Desk, "Point Beach Nuclear Plant, Units 1 and 2, Dockets 50-266 and 50-301, Renewed License Nos. DPR-24 and DPR-27, 10 CFR 50.46Annual Report," April14, 2015 (ML15104A561).

Page 1 of 3

Table 1 Large Break LOCA Margin Summary Sheet- 2015 Annual Report Plant Name: Point Beach Units 1 and 2 Utility name: NextEra Energy Evaluation Model: Westinghouse Realistic Large Break LOCA Evaluation Model using ASTRUM EvalUation Model PCT (Unit 1/Unit 2):

Net PCT Absolute PCT Effect Effect Unit 1/Unit 2 Unit 1/Unit 2 Prior 10 CFR 50.46 Changes or A ilPCT +21 0°F/+248°F 21 0°F/340°F Error Corrections- up to Year 2014 Prior 10 CFR 50.46 Changes or B ilPCT None None Errors Corrections -Year 2015 10 CFR 50.46 Changes in Year c 2015 Since Item B ilPCT None None Absolute Sum of 10 CFR 50.46 D ilPCT 21 0°F/340°F Changes The sum of the PCT from the most recent analysis using an acceptable evaluation model and the estimates of PCT impact for changes and errors identified since this analysis Page 2 of 3

Table 2 Small Break LOCA Margin Summary Sheet- 2015 Annual Report Plant Name: Point Beach Units 1 and 2 Utility name: NextEra Energy Evaluation Model: Westinghouse Small Break LOCA Evaluation Model with NOTRUMP Evaluation Model PCT (Unit 1/Unit 2):

1. Net PCT Absolute PCT Effect Effect Unit 1/Unit 2 Unit 1/Unit 2 Prior 10 CFR 50.46 Changes or OoF/OoF A ~PCT 0°F/0°F Error Corrections- up to Year 2014 Prior 10 CFR 50.46 Changes or B ~PCT None None Errors Corrections - Year 2015 10 CFR 50.46 Changes in Year c 2015 Since Item B

~PCT None None

~PCT The sum of the PCT from the most recent analysis using an acceptable evaluation model and the estimates of PCT impact for changes and errors identified since this analysis Page 3 of 3