NRC 2010-0003, License Amendment Request 261, Extended Power Uprate Auxiliary Feedwater System Pipe Stress Analysis Information

License Amendment Request 261, Extended Power Uprate Auxiliary Feedwater System Pipe Stress Analysis Information

ML100110037
Person / Time
Site:	Point Beach
Issue date:	01/08/2010
From:	Meyer L Point Beach
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
LAR 261, NRC 2010-0003
Download: ML100110037 (6)

Text

January 8,201 0 NEXBera TM ENERGY@

POINT BEACH 7

NRC 201 0-0003 10 CFR 50.90 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 License Amendment Request 261 Extended Power Uprate Auxiliary Feedwater System Pipe Stress Analysis lnformation

References:

(1)

FPL Energy Point Beach, LLC letter to NRC, dated April 7,2009, License Amendment Request 261, Extended Power Uprate (ML091250564)

(2)

NextEra Energy Point Beach, LLC letter to NRC, dated November 21,2009, License Amendment Request 261, Extended Power Uprate, Response to Request for Additional lnformation (ML093270032)

NextEra Energy Point Beach, LLC (NextEra) submitted License Amendment Request (LAR) 261 (Reference I ) to the NRC pursuant to 10 CFR 50.90. The proposed amendment would increase each unit's licensed thermal power level from 1540 megawatts thermal (MWt) to 1800 MWt, and revise the Technical Specifications to support operation at the increased thermal power level.

Via Reference (2), NextEra made a commitment to provide additional information for the auxiliary feedwater (AFW) system. Enclosure 1 provides this information.

Summary of Regulatory Commitments The information provided in Enclosure I fulfills the following Regulatory Commitment made in Reference (2):

a NextEra will supplement the response to RAI Questions 2 and 3 to the NRC by January 8, 2010. The supplement will contain: (I) The results of the pipe stress analysis for the Unit 1 tie-in locations. (2) The summary of loads compared to specific allowable values for the nozzles. (3) Confirmation that all AFW piping and pipe supports have been evaluated and are demonstrated to remain structurally adequate.

NextEra Energy Point Beach, LLC, 6610 Nuclear Road, Two Rivers, WI 54241

Document Control Desk Page 2 The information contained in this letter does not alter the no significant hazards consideration contained in Reference ( I ) and continues to satisfy the criteria of 10 CFR 51.22 for categorical exclusion from the requirements of an environmental assessment.

In accordance with 10 CFR 50.91, a copy of this letter is being provided to the designated Wisconsin Official.

I declare under penalty of perjury that the foregoing is true and correct.

Executed on January 8,201 0.

Very truly yours, NextEra Energy Point Beach, LLC

/

Po<

Larry Meyer Site Vice President Enclosure cc:

Administrator, Region Ill, USNRC Project Manager, Point Beach Nuclear Plant, USNRC Resident Inspector, Point Beach Nuclear Plant, USNRC PSCW

ENCLOSURE I NEXTERA ENERGY POINT BEACH, LLC POINT BEACH NUCLEAR PLANT, UNITS I AND 2 LICENSE AMENDMENT REQUEST 261 EXTENDED POWER UPRATE AUXILIARY FEEDWATER SYSTEM PIPE STRESS ANALYSIS INFORMATION Via letter dated November 21,2009, NextEra Energy Point Beach, LLC (NextEra) committed to provide additional information related to auxiliary feedwater pipe and support analyses (Reference I). The following information is provided by NextEra in response to this Regulatory Commitment.

Item I NextEra will provide the results of the pipe stress analysis for the Unit I tie-in locations for the auxiliary feedwater (AFW) system.

NextEra Response The following summarizes results of pipe stress analysis for the design configuration of the Unit 1 motor-driven AFW (MDAFW) tie-ins:

a Unit I MDAFW pump discharge to existing AFW discharge header to A steam generator outside containment Table of Maximum Stresses Page 1 of 4

a Unit I MDAFW pump discharge to existing AFW discharge header to B steam generator outside containment Table of Maximum Stresses NextEra will provide the summary of loads compared to specific allowable values for the nozzles on the AFW system.

NextEra Response The following nozzle loads were identified from the piping analysis:

a Unit 1 MDAFW Pump Page 2 of 4 Level C - Safe Shutdown Earthquake Mb= 146 Mc = 700 Fa = 200 Fb = 350 Fc = 65 Mb = 684 Mc = 777 F,=319 Fb = 564 Fc = 83

O Unit 2 MDAFW Pump The following bounding loads were reviewed with the pump vendor. The pump vendor has preliminarily indicated that with these loads, the pump stresses are within Code allowable values.

Confirmation that the loads are within Code allowable values will be confirmed by final calculations.

~ e v e l C - Safe Shutdown Earthquake Moments (M) are expressed in ft-lbs Forces (F) are expressed in Ibs a - axial b - veritical c - lateral Mb= 158 Mc = 472 Fa = 43 Fb= 615 Fc= 128 Level C - Safe Shutdown Earthquake Page 3 of 4 Mb = 763 Mc = 734 Fa = 402 Fb = 904 Fc= 190 Mb = 850 Mc =

Fa = 450 Fb = 1,000 Fc = 250 Mb = 850 Mc = 900 Fa = 450 Fb = 1,000 Fc = 250

NextEra will provide confirmation that all AFW piping and pipe supports have been evaluated and are demonstrated to remain structurally adequate.

NextEra Response Piping and pipe supports affected by modifications to the A M system have been evaluated and remain structurally adequate for the current design.

Reference (1)

NextEra Energy Point Beach, LLC letter to NRC, dated November 21,2009, License Amendment Request 261, Extended Power Uprate, Response to Request for Additional Information (ML093270032)

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