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 2 Maximum Extended Load Line Limit Analysis Plus (MELLLA+)

Brunswick Steam Electric Plant (BSEP) - MELLLA+ Slide 2 Purpose of Presentation Provide NRC -

Background

Overview of Proposed License Changes License Application Request Contents

- LAR Body

- Safety Analysis Report

- Proposed Markups

- Supporting Documents Similarities with other MELLLA+ Submittals

- T.S. Instrumentation

- Standby Liquid Control Boron Enrichment

- Operational Restrictions

- T.S. Administrative Requirements Differences with other MELLLA+ Submittals Licensing/Implementation Timeline 2

Brunswick Steam Electric Plant (BSEP) - MELLLA+ Slide 3

Background

The 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 pressure Benefits Increased net electric generation

- Lower average pumping power

- Fewer downpowers Fewer reactivity manipulations 3

Brunswick Steam Electric Plant (BSEP) - MELLLA+ Slide 4 Overview of Proposed Licensing Changes T.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 Protection Standby 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 concentration Operational 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 changes

• Earlier plans to utilize AREVAs Enhanced Option III stability solution for MELLLA+ were revised to the GEH DSS-CD stability solution 4

Brunswick Steam Electric Plant (BSEP) - MELLLA+ Slide 5 License Application Request (LAR) Contents LAR 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+ submittals Safety 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 included Proposed 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 Report 5

Brunswick Steam Electric Plant (BSEP) - MELLLA+ Slide 6 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 Submittal Operational Restrictions

- Operation in MELLLA+ domain not allowed with Feedwater Temperature Reduction (FWTR)

- Single Loop Operation (SLO) not allowed in the MELLLA+ domain 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 changes BSEP license changes are consistent with license changes approved for other MELLLA+ Plants 6

Brunswick Steam Electric Plant (BSEP) - MELLLA+ Slide 7 Differences with other MELLLA+ Submittals The major difference for BSEP is the use of a full core of AREVA ATRIUMTM 10XM Fuel. The justification demonstrating the acceptability of ATRIUMTM 10XM 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 ATRIUMTM 10XM fuel

- Uncertainties in modeling ATRIUMTM 10XM 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 submittal 7

Brunswick Steam Electric Plant (BSEP) - MELLLA+ Slide 8 License Amendment Request Timeline BSEP MELLLA+ LAR submittal (both Units) September 2016 NRC reviews (18 - 24 months) 3Q 2016 - 3Q 2018 MELLLA+ approval (both Units) 3Q 2018 MELLLA+ implementation

- UNIT 1 - Online during B1C22 3Q 2018

- UNIT 2 - Online during B2C23 3Q 2018 8

Brunswick Steam Electric Plant (BSEP) - MELLLA+ Slide 9 Questions and Discussion?

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