STEAM DOME STEAM SEPARATORS BULK WATER STAND PIPES UPPER PLENUM D O W N C O M E R D O W N C O M E R CORE LOWER PLENUM PUMP PUMP

Transcription

1 STEAM DOME BULK WATER STEAM SEPARATORS STAND PIPES UPPER PLENUM D O W N C O M E R CORE D O W N C O M E R PUMP LOWER PLENUM PUMP

2 Reactivity Excursions (Ejected Bank/Rod) Dropped Rod Transients Dynamic Rod Worth Steam Line Break (With or Without Cross Flow, Known b.c.) Boron Dilution (Known b.c.)

3 Stability Analysis SCRAM Reactivity Reactivity Excursions (Dropped/ Stuck Rod) Pump Trips Pressurization Transients

4 Bank SA Bank SB Reactivity 4 1, Core Power (Calc) IRM (Calc) IRM (Meas) PRM (Calc) PRM (Meas) P C M - o r - S t e p s P O W E R ( % ) ELAPSED TIME (SEC)

5 180 N43 N42 Cor e Core Barrel Reactor Vess el θ 1 θ 2 Detector N41 (45 ) 0 N44 Con cret e Sh ielding Subtended ray to vessel outer wall Subtended ray to visible void r egion Dropped Control Rod (B-08)

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7 Establish Slight Super-Criticality At Low Power Insert Rod Bank At Maximum Drive Speed Collect Signals On Power Range Monitors Invert Power Signal To Determine Dynamic Reactivity vs. Time (Or Rod Position) Convert Dynamic Reactivity To Static Reactivity

8 Power (%) Rod Position (steps) Time (s)

9 Bank Difference (Order of Worth) pcm %(M-P)/P Acceptance: 15% or 100 pcm Courtesy Duke Power Catawba 1 Cycle 11 CD CC CB CA SE SD SC SB 1.3 SA Total

10 MOX Enhancements to Spatial Nodal Model - SANM -RHC -etc Same as in SIMULATE-3

11 RETRAN CENTS TRAC RELAP5 SIMULATE-3K LINKAGE: pure data exchange; no changes to physical models or I/0

12 A1 A2 P Decay Ratio = A2 A1 Frequency = 1 P

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14 SIMULATE-3K Decay Ratio Cycle 14 Cycle 15 Cycle 16 Cycle Measured Decay Ratio

15 Six-equation Thermal-Hydraulics Fully Discretized BWR Vessel Model Upper Plenum/Standpipes/Steam Separators Downcomer (Two Separate 1-D Components) Recirculation Loops (Including Pump Torque and Inertia) Lower Plenum Simple Feed Water Control System

16 Steam Line Model (From RAMONA-5) 1-D Pipe Components Isolation/Bypass/Safety/Relief Valve Models Valve Control Systems

17 STEAM DOME BULK WATER STEAM SEPARATORS STAND PIPES UPPER PLENUM D O W N C O M E R CORE D O W N C O M E R PUMP LOWER PLENUM PUMP

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19 Steam Line Model Turbine Bypass Model Safety and Relief Valves STEAM LINE TURBINE STOP VALVE SAFETY AND RELIEF VALVE STEAM DOME BYPASS MSIV

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21 Six-Equation Thermal-Hydraulics Fully Discretized BWR Vessel Model Upper Plenum/Standpipes/Steam Separators Downcomer (Two Separate 1-D Components)

22 General Enhancements Baroczy or Martinelli-Nelson 2-Phase Multiplier DEF STABILITY, time / To Set Time Duration FIL.INC Supported For QA Purposes/Simplicity CMS-view Edits Octant Power Edits (For Regional Analysis) Simple Ring Edits (Inner Core/Outer Core) 2-D Power/Inlet Flow/Outlet Flow Edits

23 Normal Decay Ratios? Transition?

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25 Out of Phase In Phase

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27 Numerous Applications Now Licensed On-going Expansions Of S3K Capabilities Investigations of Instability Sensitivities Benchmarking Of New Version In Progress