ML083330153

Correction to the Safety Evaluation for Amendment 174 Extended Power Uprate

ML083330153
Person / Time
Site:	Hope Creek
Issue date:	03/06/2009
From:	John Lamb Plant Licensing Branch 1
To:	Joyce T Public Service Enterprise Group
Lamb John G./NRR/DORL, 415-3100
References
TAC MD3002
Download: ML083330153 (5)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555*0001 Mr. Thomas Joyce President & Chief Nuclear Officer PSEG Nuclear LLC - N09 Post Office Box 236 Hancocks Bridge, NJ 08038 SUB..IECT:

HOPE CREEK GENERATING STATION - CORRECTION TO THE SAFETY EVALUATION FOR AMENDMENT 174 RE: EXTENDED POWER UPRATE (TAC NO. MD3002)

Dear Mr. Joyce:

On May 14, 2008 (Agencywide Documents Access and Management System (ADAMS)

Accession No. ML081230540), the U.S. Nuclear Regulatory Commission (NRC) issued Amendment No. 174 to Facility Operating License No. NPF-57 for the Hope Creek Generating Station. This amendment consisted of changes to the Facility Operating License and the Technical Specifications (TSs) in response to your application dated September 18, 2006,' as supplemented by additional letters," The amendment increased the authorized maximum power level by approximately 15 percent, from 3,339 megawatts thermal (MWt) to 3,840 MWt.

By letter dated November 21,2008 (ADAMS Accession No. ML083370304), PSEG Nuclear LLC notified the NRC staff that a sentence should be deleted from page A-5 of the related safety evaluation (SE). The sentence reads, "PSEG did not take credit for conservative (negative) bias values in the stress results." The sentence should be deleted because the Hope Creek stress results account for all the end-to-end biases and uncertainties in the loads model.

Enclosed is the corrected page to the SE for the non-proprietary version. Please discard the associated page from the previous non-proprietary SE and replace it with the enclosed page.

The corrected page to the non-proprietary SE does not change the NRC staff conclusions regarding Amendment No. 174 for the Hope Creek Generating Station. The corrected page for the proprietary version of the SE will be sent under separate cover.

1 Agencywide Documents Access and Management System (ADAMS) Accession Number ML062680451 2 October 10, 2006 (ML062920092); October 20, 2006 (ML063110164); February 14, 2007 (ML070530099); February 16, 2007 (ML070590182); February 28,2007 (ML070680314): March 13,2007 (ML070790508 & ML070810360); March 22, 2007 (ML070930442); March 30, 2007 (ML071010243 & ML070960103); April 13,2007 (ML071140157); April 18,2007 (ML071160121):

April 30, 2007 (ML071290559); May 10 (ML071360375): May 18, 2007 (ML071500294, ML071720368, & ML071500317);

May 24, 2007 (ML071630305): June 22, 2007 (ML071840167); July 12, 2007 (ML072110215); August 3, 2007 (ML072250369):

August 17, 2007 (ML072480515); August 27,2007 (ML072480570); August 31,2007 (ML072540651); September 11,2007 (ML072640410): October 10, 2007 (ML080580475); October 23,2007 (ML073040393); November 15, 2007 (ML073320601);

November 30, 2007 (ML073460793); December 31, 2007 (ML080080577); January 14, 2008 (ML080230069); January 15, 2008 (ML080250028); January 16, 2008 (ML080290663); January 18,2008 (ML080280531); January 25,2008 (ML080360467);

January 30,2008 (ML080420468): March 18,2008 (ML080860477 & ML080870082); and May 2,2008 (ML081270387)

T. Joyce

- 2 If you have any questions, please call me at 301-415-3100.

hn G. Lamb, Senior Project Manager lant Licensing Branch 1-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-354

Enclosures:

1. Bases for corrections to the SE

2. Corrected page to non-proprietary SE cc w/encl 1 and 2: Distribution via Listserv

CORRECTED PAGE TO THE SAFETY EVALUATION FOR AMENDMENT NO. 174 - EXTENDED POWER UPRATE HOPE CREEK GENERATING STATION DOCKET NO. 50-354 The following page was corrected in the safety evaluation for Amendment No. 174, "Extended Power Uprate," for the Hope Creek Generating Station:

Page A-5 Enclosure

A-5 Acoustic Circuit Model PSEG developed a new acoustic circuit model (ACM Rev. 4) to predict full scale steam dryer loads from in-plant measurements, with the inclusion of a low frequency hydrodynamic contribution. The model is described in LR-N07-0171,9 Attachment 3, COl Report 07-09P (Rev.

1), "Methodology to Predict Full Scale Steam Dryer Loads from In-Plant Measurements, with the Inclusion of a Low Frequency Hydrodynamic Contribution" (Proprietary), 10 and is based on the Bounding Pressure Model defined in LR-N06-0286,11 Attachment 20, COl Report 05-28P, "Bounding Methodology to Predict Full Scale Steam Dryer Loads from In-Plant Measurements (C.D.1. Proprietary).';" The new model improves the prediction of the steam dryer loads at low frequencies up to 60 Hz. ((

))

The parameters of the new ACM Rev. 4 are "tuned" by means of QC2 in-plant measurements at OLTP (790 megawatts electric [MWe]) because the corresponding Mach number (M=0.105) in QC2 MSLs would be similar to that for Hope Creek at EPU conditions. The MSL strain gage measurements are used to estimate the ((

)). The predictions of the new version are compared with the pressure measurements on the steam dryer in QC2. The low frequency (:5 60 Hz) prediction appears to envelop the QC2 measurements at low frequencies. In addition, the new model seems to reduce the bias and uncertainty errors in the frequency range of 40 to 60 Hz (bias from 14 to 0.4 percent and uncertainty from 15 to 7 percent).

In LR-N07-0171, Attachment 3, COl Report 07-09P (Rev. 1), "Methodology to Predict Full Scale Steam Dryer Loads from In-Plant Measurements, with the Inclusion of a Low Frequency Hydrodynamic Contribution," PSEG compared the direct measurements and 'blind' simulations of the surface pressures on the QC2 dryer (prior to the installation of acoustic side branches (ASBs) at QC) and established the bias errors and uncertainties associated with ACM generated loads on the dryer. The bias errors and uncertainties of the analysis were found to be frequency-dependent. For example, the bias errors were negative (conservative), or less than (()) percent, for all evaluated frequency ranges with the exception of a positive (( ))

percent bias error between 116 and 120 Hz. The uncertainty values extended from ((

))

percent within specific intervals over the evaluated frequency range.

The large bias error ((( )) percent) for frequencies between 116 and 120 Hz is based on the ACM's underestimation of the dryer loads caused by flow-induced acoustic resonances in the SRVs of the QC2 plant at 156 Hz. Because similar errors may occur for other SRV resonances in other plants, PSEG will apply the (( )) percent bias and (( )) percent uncertainty to any SRV resonance that may appear in the MSL signals during Hope Creek power ascension.

9 PSEG Letter (LR-N07-0171) to NRC dated August 3,2007, "Response to Request for Additional Information, Request For License Amendment. Extended Power Uprate" ADAMS Accession No. ML072250369 10 CDI Report 07-09P (Rev. 1), "Methodology to Predict Full Scale Steam Dryer Loads from In-Plant Measurements, with the Inclusion of a Low Frequency Hydrodynamic Contribution" (Proprietary) ADAMS Accession No. ML072250371 11 PSEG Letter (LR-N06-0286) to NRC dated September 18, 2006, "Request for License Amendment Extended Power Uprate, Hope Creek Generating Station Facility, Operating License NPF-57, Docket No. 50-354" ADAMS Accession No. ML062680451 12 ADAMS Accession No. ML061300484 (Proprietary)

T. Joyce

-2 If you have any questions, please call me at 301-415-3100.

Sincerely, IRA!

John G. Lamb, Senior Project Manager Plant Licensing Branch 1-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-354

Enclosures:

1. Bases for corrections to the SE

2. Corrected page to non-proprietary SE cc w/encl 1 and 2: Distribution via Listserv DISTRIBUTION:

PUBLIC RidsNrrDorlLpl1-2 Resource RidsNrrPMREnnis Resource RidsNrrPMJLamb Resource RidsNrrLAABaxter Resource RidsOgcRp Resource GHili (2)

RidsAcrsAcnw_Maili CTR Resource RidsNrrOD Resource RidsNrrAdro Resource RidsNrrAdes Resource RidsNrrDorl Resource RidsNrrDorlDD Resource RidsRgnlMailCenterResource RidsNrrDeEeeb Resource RidsNrrDeEicb Resource RidsNrrDssSbpbResource RidsNrrDciCvib Resource RidsNrrDssScvb Resource RidsNrrDraAadb Resource RidsNrrDraAfpb Resouce RidsNrrDraApla Resource RidsNrrDciCsgb Resource RidsNrrDciCpnb Resource RidsNrrDciCptb Resource RidsNrrDeEmcb Resource RidsNrrDssSnpb Resource RidsNrrDirslolb Resource RidsNrrDssSrxb Resource Package: ML083330147 Accession No.: ML083330153 Corrected Pa e A-6: ML083330156 OFFICE LPL1-2/PM LPL 1-2/LA LPL1-2/BC NAME JLamb ABaxter HChernoff DATE 12/12/08 12/12/08 3/06/09 OFFICIAL AGENCY RECORD