ML25069A448
| ML25069A448 | |
| Person / Time | |
|---|---|
| Site: | Nuclear Energy Institute |
| Issue date: | 04/22/2025 |
| From: | Sarikaya B Nuclear Energy Institute |
| To: | Division of Operating Reactor Licensing |
| References | |
| RIC 2025 | |
| Download: ML25069A448 (1) | |
Text
©2025 Nuclear Energy Institute 1
©2025 Nuclear Energy Institute Baris Sarikaya Principal Engineer Constellation Analytical and Review Efficiencies for Power Uprate Submittals March 11, 2025
©2025 Nuclear Energy Institute 2 EPU & MELLLA+ Case Study Implementation Example Combined License Applications Nine Mile Unit 2 Peach Bottom EPU 31 23 MELLLA+
22 18 MUR 9
Review Time (months) 53 50 Implementation Time (months) 76 62
©2025 Nuclear Energy Institute 3 100 100 Core Thermal Power (%)
Core Flow (%)
120 EPU ICF EPU and MELLLA+ Case Study
©2025 Nuclear Energy Institute 4 Increased operational flexibility
Improved flow window
Improved capacity factor
Less complicated
fuel and core design
cycle management
plant operation
Reduced risk of HU error
Less MCR resource requirement Fewer Control Rod Maneuvers Improved reactivity management improved safety Fewer fuel conditioning flow ramps improved fuel reliability Reduced Operator Burden ->
improved safety Fewer load drops higher capacity factor improved equipment reliability Reduced risk of FM to become dislodged Reduced risk of fuel failures Improved Fuel Cycle Economics Less complicated fuel & core design Less complicated cycle management Improved fuel utilization MELLLA+ supports operation at EPU power levels in a safe, effective, & efficient manner EPU and MELLLA+ Case Study
©2025 Nuclear Energy Institute 5 EPU & MELLLA+ Case Study Why EPU & MELLLA+
Combined Applications MELLLA+ supports operation at EPU power levels in the safe, effective, and efficient manner Lessons learned and operational experience gained with EPU / MELLLA+
plants Synergy in analytical scope example: one analysis can cover all 3 conditions (EPU, MUR, MELLLA+)
Review Efficiency example: no need to review 3 very similar analyses.
Combined License Applications
©2025 Nuclear Energy Institute 6 EPU & MELLLA+ Case Study Why EPU & MELLLA+
Combined Applications Previous example: 6 years for 3 submittals in series Could be reduced to 2 years with 3 submittals combined.
Nine Mile-2 Peach Bottom EPU 31 23 MELLLA+
22 18 MUR 9
Review Time (m) 53 50 Implementation Time (m) 76 62 Combined Application Review EPU MELLLA+
MUR Total (m) 24 Combined License Applications
©2025 Nuclear Energy Institute 7
©2025 Nuclear Energy Institute 7 Plans for over 3GWe new capacity Bridge to new and advanced reactors Increased market confidence:
Meeting costs and schedules Meeting NRC review timeliness goals Promotes the nuclear workforce Cultivates the supply chain Responding to NRC uprate RIS NRC/NEI workshops making progress on uprate review improvements Power Uprates: Summary