ML13277A037

Duke Energy Presentation - Brunswick Mellla+ Methods Applicability, Pre-Application Meeting, August 20, 2013

ML13277A037
Person / Time
Site:	Brunswick
Issue date:	08/20/2013
From:	Duke Energy Carolinas
To:	Office of Nuclear Reactor Regulation
References
BSEP 13-0104
Download: ML13277A037 (18)

Text

Enclosure 1 BSEP 13-0104 Duke Energy Presentation - Brunswick MELLLA+ Methods Applicability, Pre-Application Meeting, August 20, 2013

Brunswick MELLLA+

Methods Applicability Pre-Application Meeting August 20, 2013

$~DUKE ENERGY.

Brnsic MLA+ Methos Appiablt

• Duke Participants

• GEH Participants

" Roger Thomas " Jens Andersen

" Jeff Boaz " Kent Halac

" Bill Murray " JD Kvaall

" Charles Stroupe " Jim Harrison (Presenter)

• Bruce Hagemeier r@DUKE 2 ENERGY.

• Schedule

• Introduction and Objectives

• Fuel and plant licensing analysis strategy

• GEH Methods Applicability to AREVA fuel

• AREVA Methods Applicability to MELLLA+: Approach

• Summary 3 ENERGY.

Schedule

" MELLLA+ LAR submittal (both Units) Fall 2014

+ B1C19 sample problem with ATRIUMTM 1OXM

" BIC21 cycle specific application results to NRC Fall 2015

• First planned MELLLA+ cycle

" MELLLA+ requested approval (both Units) Spring 2016

• MELLLA+ implementation

1. During B1C21 refueling outage Spring 2016 DUKE 4 ENERGY.

• Provide details on GEH methods applicability

1. GEH ability to model ATWS with AREVA fuel

• AREVA methods applicability to MELLLA+: Approach

~@DUKE 5 ENERGY.

" On January 8, 2013 Duke energy presented a pre-application meeting with the NRC. (ML13007A373)

" Benefits of MELLLA+

" Approach to fuel and licensing analysis strategies

• Thermal hydraulic stability solution (AREVA's Enhanced Option IIl)

• Containment Accident Pressure (CAP)

" Anticipated Transient Without SCRAM analysis

" MELLLA+ impacts

• Several follow up pre-application meetings were proposed.

For today's meeting, methods applicability will be discussed.

• The NRC requested "The licensee should justify the use and applicability of the GEH generic MELLLA+ LTR to the AREVA approaches and the use of AREVA fuel assemblies."

(ML13016A014) DUKE 6 ENEGY

Brunswick MELLLA+ Power Flow Map I 120.0 110.0 100.0 90.0 80.0 70.0 o 60.0 50.0 40.0 30.0 20.0 10.0 0.0 0.0 7.7 16.4 23.1 30.8 38.5 46.2 53.9 61.6 69.3 77.0 84.7 92.4 Mlbs/hr Core Flow 0 10 20 30 40 50 60 70 80 90 100 110 120  % Core Flow 7 NERGY.

" All topical areas of the MELLLA+ LTR will be addressed in the LAR

• Duke Energy will address:

" SAR Integration of GEH and AREVA input

" APRM and Enhanced Option III setpoints and implementation

• Risk evaluation, procedure updates, operator training

" Plant changes to mitigate ATWS (SLC B-10 enrichment increase)

• Selected non-fuel impacts 8 ENERGY.

• GEH MELLLA+ LTR process (NEDC-33006P-A) with GEH methodologies and analyses will address:

• Non-fuel impacts

" Long term ATWS and ATWS instability explicitly modeling ATRIUMTM 1OXM fuel 9@"DUKE 9 ENNERGY.

Fuel and plant licensing analysis strategy AREVA

• AREVA methodologies and analyses will address:

° Fuel, core design, COLR fuel limits, LOCA, DBA

" ATWS and ASME overpressure

" Enhanced Option III (EO-Ill) stability solution 10

$~DUK ENERGY.

GE ehd Appiablt to AR A fue

• GEH will present information on methods applicability

• ATRIUM TM 10 Fuel Experience

• ATRIUMTM 1OXM Fuel for ATWS Methods

" Uncertainty Identification/Management Process

• ATRIUMTM 1OXM Modeling Approach

" Methods Application

• Core Modeling

• ATWS Analysis

• Applicable Interim Methods LTR and MELLLA+ LTR Limitations and Conditions

~@DUKE 11 ENERGY.

• GEH proprietary presentation will be given at this point in the presenation 12 $ENERGY.

" Schedule

• Introduction and Objectives

• Fuel and plant licensing analysis strategy

• GEH Methods Applicability to AREVA fuel

• AREVA Methods Applicability to MELLLA+: Approach

• Summary 1 DUKE 13 ENERGY.

AREA Mehoso Appiabltyt M LA: Approac

" An AREVA methods applicability report has been generated that addresses: Thermal-Hydraulics, Core Neutronics, Transient Analysis, LOCA and Stability.

• Report will be submitted for information with the LAR

" Methods applicability report shows

• There are no SER restrictions on AREVA methodology that are impacted by MELLLA+ operation

• MELLLA+ core and assembly conditions for Brunswick are equivalent to core and assembly conditions of other plants for which the methodology was benchmarked

• Bundle operating conditions in the MELLLA+ regime are within the envelope of hydraulic test data used for model qualification and operating experience

• The AREVA methodology is applicable for MELLLA+ conditions at Brunswick 14DUKE 14 ENERGY.

Summary

• GEH methods are applicable to ATRIUM TM 1OXM fuel in the MELLLA+ condition

" ATRIUMTM 1OXM explicitly modeled

• Uncertainties in modeling ATRIUMTM 1OXM fuel with GEH methods addressed

• AREVA methods applicability to MELLLA+

• Methods applicability report will be submitted with LAR 15 $ENERGY.

Brunswick MELLLA+ Fuels Methods Applicability Questions?

16 c@

uK R-XRGY.

Selected Acronyms AL - Analytical Limit LAR - License Amendment Request AP -Annulus Pressurization LOCA- Loss of Coolant Analysis APRM -Average Power Range Monitor LTR - License Topical Report ATWS -Anticipated Transient Without Scram MELLLA- Maximum Extended Load Line Limit AV - Allowable Value Analysis BSP - Backup Stability Protection MELLLA+ - Maximum Extended Load Line Limit Analysis Plus CAP - Containment Accident Pressure NC - Natural Circulation CIER - Channel Instability Exclusion Region NPSH - Net Positive Suction Head COLR - Core Operating Limits Report NTSP - Nominal Trip Setpoint DBA - Design Basis Accidents PRNM - Power Range Neutron Monitor ECCS - Emergency Core Cooling System SAR - Safety Analysis Report EO-Ill - Enhanced Option III SBO - Station Black Out EPU - Extended Power Uprate SLC - Standby Liquid Control FWHOOS - Feedwater Heater Out Of Service SLO - Single Loop Operation FWT - Feedwater Temperature SPT - Stability Protection Trip GEH - General Electric Hitachi STP - Simulated Thermal Power HCTL - Heat Capacity Temperature Limit TLO - Two Loop Operation HSBW - Hot Shutdown Boron Weight 2RPT - Two Recirculation Pump TrihoADE*

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