ML16231A132
| 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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