ML16231A132

Materials for 8/18/16 Pre-Application Meeting Brunswick Mellla+ LAR

ML16231A132
Person / Time
Site:	Brunswick
Issue date:	08/18/2016
From:	Duke Energy Progress
To:	Office of Nuclear Reactor Regulation
References
Download: ML16231A132 (9)

Text

Brunswick Steam Electric Plant (BSEP)-Units 1 and 2Maximum Extended Load Line Limit Analysis Plus (MELLLA+)

Slide 2Brunswick Steam Electric Plant (BSEP) -MELLLA+Purpose of PresentationProvide NRC -Background Overview of Proposed License ChangesLicense Application Request Contents-LAR Body

-Safety Analysis Report

-Proposed Markups

-Supporting DocumentsSimilarities with other MELLLA+ Submittals-T.S. Instrumentation

-Standby Liquid Control Boron Enrichment

-Operational Restrictions

-T.S. Administrative RequirementsDifferences with other MELLLA+ SubmittalsLicensing/Implementation Timeline2 Slide 3Brunswick Steam Electric Plant (BSEP) -MELLLA+BackgroundThe 2002 Extended Power Uprate (EPU) reduced the licensed flow window at rated power from approximately 24% to 6% Total Core Flow.MELLLA+ will expand the licensed flow window at 100% power to approximately 20% Total Core Flow.Operating domain expansion does not include changes to the licensed reactor power, the maximum licensed core flow or the current dome pressureBenefitsIncreased net electric generation -Lower average pumping power-Fewer downpowersFewer reactivity manipulations3 Slide 4Brunswick Steam Electric Plant (BSEP) -MELLLA+Overview of Proposed Licensing ChangesT.S. Instrumentation -Changes consistent with GEH DSS-CD LTR template (NEDC-33075P-A, Revision 8)*-TS LCO 3.3.1.1 RPS Instrumentation (Simulated Thermal Power-High setpoints and OPRM Upscale) -New proposed LCO actions for equipment out of service including Automated Backup Stability ProtectionStandby Liquid Control Boron Enrichment-TS 3.1.7 SLC Boron-10 minimum enrichment increased to 92 atom-%-Revised graph showing required volume (TS Figure 3.1.7-1) -no changes to boron concentrationOperational Restrictions-License Condition -Operation in MELLLA+ domain not allowed with Feedwater Temperature Reduction (FWTR)-LCO 3.4.1 -Operation in MELLLA+ not allowed with Single Loop Operation (SLO) T.S. Administrative Requirements-TS 5.6.5 -COLR content requirements for MELLLA+ / Updated list of analytical methods-New TS 5.6.7 -Reporting requirements supporting LCO 3.3.1.1 changes4* Earlier plans to utilize AREVA's Enhanced Option III stability solution for MELLLA+ were revised to the GEH DSS-CD stability solution Slide 5Brunswick Steam Electric Plant (BSEP) -MELLLA+License Application Request (LAR) ContentsLAR Body-Provides roadmap of changes and justification, no significant hazards, etc.-Provides specific discussion addressing license changes -Additional topics based on Operating Experience from other docketed MELLLA+ submittalsSafety Analysis Report (SAR)-Follows the NRC Approved GEH MELLLA+ Licensing Topical Report (LTR) -NEDC-33006P-A -Integrates analyses from GEH, AREVA and Others-Summarizes the results of significant safety evaluations -Proprietary and non-proprietary versions includedProposed Mark-ups-Technical Specifications-Operating License-TS Bases (information only)Supporting Documents -proprietary and non-proprietary-Methods Applicability Report-Representative cycle MELLLA+ Reload Safety Analysis Report (RSAR)-Representative cycle Fuel Cycle Design Report-LOCA-ECCS Analysis Report5 Slide 6Brunswick Steam Electric Plant (BSEP) -MELLLA+Similarities with other MELLLA+ Submittals(Monticello, Grand Gulf, Nine Mile Point-2, Peach Bottom)T.S. Instrumentation -Changes consistent with DSS-CD LTR and other plants-Some minor administrative variations Standby Liquid Control Boron Enrichment (from 47 atom-% to 92 atom-%)-Not included as part of all MELLLA+ submittals -adopted to provide additional ATWS margin.-Minimal changes to existing BSEP TS-Similar to approved NMP2 SLC SubmittalOperational Restrictions-Operation in MELLLA+ domain not allowed with FeedwaterTemperature Reduction (FWTR)-Single Loop Operation (SLO) not allowed in the MELLLA+ domainT.S. Administrative Requirements-TS 5.6.5 -COLR content requirements for MELLLA+ / Updated list of analytical methods-New TS 5.6.7 -Reporting requirements supporting LCO 3.3.1.1 changesBSEP license changes are consistent with license changes approved for other MELLLA+ Plants6 Slide 7Brunswick Steam Electric Plant (BSEP) -MELLLA+Differences with other MELLLA+ SubmittalsThe major difference for BSEP is the use of a full core of AREVA ATRIUMTM 10XM Fuel. The justification demonstrating the acceptability of ATRIUMTM10XM in the MELLLA+ operating domain is addressed in the MELLLA+ SAR as follows:GEH methodologies and analyses address: -Detect and Suppress Solution -Confirmation Density (DSS-CD) solution-Long term ATWS and ATWS instability explicitly modeling ATRIUMTM10XM fuel-Uncertainties in modeling ATRIUMTM10XM fuel with GEH methods addressed AREVA methodologies and analyses address:-Thermal-Hydraulics, Core Neutronics, Transient Analysis, Overpressure, LOCA and Stability are all evaluated and acceptable for MELLLA+ conditions-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-Additional details on the application of AREVA methods to MELLLA+ conditions are addressed in the AREVA Report ANP-3108P included with the LAR submittal7 Slide 8Brunswick Steam Electric Plant (BSEP) -MELLLA+License Amendment Request TimelineBSEP MELLLA+ LAR submittal (both Units)September 2016NRC reviews (18 -24 months)3Q 2016 -3Q 2018MELLLA+ approval (both Units)3Q 2018MELLLA+ implementation -UNIT 1 -Online during B1C22 3Q 2018-UNIT 2 -Online during B2C233Q 20188 Slide 9Brunswick Steam Electric Plant (BSEP) -MELLLA+9Questions and Discussion?