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Platform for Multi-Unit Severe Accident Simulation

Date post: 14-Jun-2015
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This presentation explores the real-time simulator as a platform for severe accident simulation and how it can be used to address post-Fukushima challenges in the nuclear energy industry. Presented at ANS PSA International Topical Meeting. For more information, go to GSES.com and follow GSE Systems on Twitter @GSESystems and Facebook.com/GSESystems. Thanks for viewing!
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Simulator Platform for Multi-Unit Severe Accident Simulation [email protected]
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Page 1: Platform for Multi-Unit Severe Accident Simulation

Simulator Platform for Multi-Unit Severe Accident Simulation

[email protected]

Page 2: Platform for Multi-Unit Severe Accident Simulation

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• Real-time simulator

• Post-Fukushima challenges

• Simulator technology

• Case studies for multi-unit plant site

Outlines

Page 3: Platform for Multi-Unit Severe Accident Simulation

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• Real-time simulators came to the nuclear industry as training tools in the 1970s– Full plant modeled, but models often “hand crafted”– Analog controls, traditional hard panel control panels

• Today’s NPP simulator is high-fidelity– Same scope, but…– Engineering-grade computer codes, such as RELAP, MAAP, S3R– Digital controls and modern HSIs– Holistic dynamic plant model:

- Multi-physics, multi-systems, multi-codes, multi-units

Real-Time Simulator

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• Broad or full-scope plant model– Includes primary, secondary, safety systems, balance-of-plant,

electrical systems, I&C, etc.– Normal operation, transients, design-basis accident

• All models integrated and synchronized (coupling)

• 1 second of problem time = 1 second of real time (feels like the real plant)

• Models are interactive– Observed and operated like the real plant– Can be integrated with real control systems

Real-Time Simulator

Page 5: Platform for Multi-Unit Severe Accident Simulation

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Post-Fukushima New Recommendations & Requirements

Multi-Unit Events, PRA

Beyond Design-Basis

Extended SBO

FLEX

New Mitigation Strategies

Predictive Response

Page 6: Platform for Multi-Unit Severe Accident Simulation

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Simulator Technology for Resource Alignment

• Common technology for:– Engineering– Risk assessment– Operations– Training– Emergency planning– Local authorities and regulators– Full-scope simulator for operator training

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• Running third-party best estimate analysis codes as integral parts of simulators

• Enforce synchronization between multiple systems and human interactions

• Maintain code integrity and repeatability

• Have access to internal memory and variables

• Advanced 2D, 3D visualization interfaces

• Post-data processing tools with database

• Multiple processors and computers

GSE High-Definition Platform

Page 8: Platform for Multi-Unit Severe Accident Simulation

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Parallel Architecture for MAAP and MELCOR

JADE Operation StationDCS-Like HMI Animation,Soft Panels,

Interface Simulation Control

HD Server 1 for MAAP5, Unit 1

HD Server 2 for MAAP5, Unit 2

HD Server 3 for MAAP5, Unit 3

JADE Dashboard (JDB)HD server

Graphical User InterfaceInteractive Control,

Monitor, V&V

HD Client 

HD Server 4 for MELCOR, Unit 1

HD Server 5 for MELCOR, Unit 2

HD Server 6 for MELCOR, Unit 3

HD Server 7 for MACCS2, Site

HD Server 8 for RASCAL, Site

Page 9: Platform for Multi-Unit Severe Accident Simulation

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Main Simulation Processes

freeze

Create restart or update input decks: PyGI

Start HD Executive

Read Input or Restart Decks

Initialize 3rd Party Engineering Code

Run a Frame

Interactive User

Actions

HD IC Files

reset

snap

End

Text Edit Output

Input or Restart File

Start 3rd Party Engineering

Code Batch Job

Read Input or Restart Decks

Initialize 3rd Party Engineering Code

Run the Whole Job

End

Scheduled Time end

 

exit

3rd Party Engineering

Code

Scheduled 

Interactive simulations with MAAP and MELCOR in the same HD platform

Page 10: Platform for Multi-Unit Severe Accident Simulation

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JADE DashBoard (JDB)

Host and executive connection Executive control Trending/Data

Collection

Executive modulesListed output and command line

Page 11: Platform for Multi-Unit Severe Accident Simulation

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V&V Tool

MAAP

MELCOREasy to compare MAAP and MELCOR results

Page 12: Platform for Multi-Unit Severe Accident Simulation

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Graphical SAMGs

Computer-based procedures help automate the SAMG to control the sequence of events in PSA-HD simulation

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• Used MAAP code as analytical and modeling tool

• Developed in collaboration with EPRI and ERIN Engineering

Fukushima Multi-Unit Accidents

Page 14: Platform for Multi-Unit Severe Accident Simulation

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Fukushima Unit 1 at 3H:38M & 11H:11M

Page 15: Platform for Multi-Unit Severe Accident Simulation

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Fukushima Unit 2 at 76H & 120H

Page 16: Platform for Multi-Unit Severe Accident Simulation

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Fukushima Unit 3 at 76H & 120H

Page 17: Platform for Multi-Unit Severe Accident Simulation

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Ex-plant DOSE Simulation

In-plant DOSE Simulation In-plant DOSE Simulation

Auxiliary Building

Unit 1 Containment Unit 2 Containment

Spent Fuel Pool

Core

RCSSG

Core

SGRCS

MAAP5

MAAP5

MAAP5

PWR with 2 Units and Spent Fuel

Page 18: Platform for Multi-Unit Severe Accident Simulation

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Loss of All AC Power with FLEX Pump Operation

FLEX Portable Diesel Generator

SG 1SG 2

SG 4

SG 3

s3.rar

G

External Water Source

Page 19: Platform for Multi-Unit Severe Accident Simulation

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Loss of All AC Power – SG#1/3

Levels kept by FLEX pumps at 50M

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UNIT 1 UNIT 2

Time 3H:36M

Reactor Core at 3H:36M

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Time 6H:23M:46S

Unit 2 Containment & Flammability at 6H:23M

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Time 6H:20M:45S

Off-Site Radiological Dose at 6H:20M

Page 23: Platform for Multi-Unit Severe Accident Simulation

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Integrated EOPs, SAMGs, etc.

Full-scope Simulator (RELAP5-HD) MAAP

NOPs EOPs SAMGs

Emergency Director(Plant Manager)

Local Field Personnel

Main Control RoomTechnical Support

CenterRadiological

Center

Postulated Actions Exercises

Realistic Training Expanded Training

Other codes

Page 24: Platform for Multi-Unit Severe Accident Simulation

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EPRI MAAP Code

• ''MAAP 5.0 is an Electric Power Research Institute (EPRI) software program that performs severe accident analysis for nuclear power plants including assessments of core damage and radiological transport. A valid license to MAAP 5.0 from EPRI for customer's use of MAAP 5.0 is required prior to a customer being able to use MAAP 5.0 with [LICENSEE PRODUCT].

• EPRI (www.epri.com) conducts research and development relating to the generation, delivery and use of electricity for the benefit of the public. An independent, nonprofit organization, EPRI brings together its scientists and engineers as well as experts from academia and industry to help address challenges in electricity, including reliability, efficiency, health, safety and the environment. EPRI does not endorse products or services, and specifically does not endorse [NEW PRODUCT NAME] or GSE. Interested vendors may contact EPRI for a license to MAAP 5.0."

Page 25: Platform for Multi-Unit Severe Accident Simulation

For more information:

Go to: www.GSES.com

Call: 800.638.7912

Email: [email protected]

Follow us on:

Twitter @GSESystems

Facebook.com/GSESystems


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