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+)
Slide 2 Brunswick Steam Electric Plant (BSEP) - MELLLA+
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
Slide 3 Brunswick Steam Electric Plant (BSEP) - MELLLA+
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
Slide 4 Brunswick Steam Electric Plant (BSEP) - MELLLA+
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 4
- Earlier plans to utilize AREVAs Enhanced Option III stability solution for MELLLA+ were revised to the GEH DSS-CD stability solution
Slide 5 Brunswick Steam Electric Plant (BSEP) - MELLLA+
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
Slide 6 Brunswick 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 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
Slide 7 Brunswick Steam Electric Plant (BSEP) - MELLLA+
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
Slide 8 Brunswick Steam Electric Plant (BSEP) - MELLLA+
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
Slide 9 Brunswick Steam Electric Plant (BSEP) - MELLLA+
9 Questions and Discussion?