This document discusses the use of a desktop simulator for training on severe accident management guidelines (SAMG), extensive damage mitigation guidelines (EDMG), and probabilistic risk assessment (PRA) in response to changes in regulations and guidelines following the Fukushima accident. The desktop simulator uses the MAAP5 software to model beyond design basis accidents for pressurized water reactors (PWRs) and boiling water reactors (BWRs). It allows users to interactively control plant systems and observe accident progression. The desktop simulator can be used for individual and team training to help utilities address challenges around staffing changes, integrating emergency procedures, and limited simulator capabilities.

1. Responding to Fukushima:
Real-time, Interactive, Beyond Design Basis Modeling
for SAMG, PRA and Training
info@gses.com

2. Outline
I. Industry changes, drivers, challenges
II. Desktop simulator
III.Examples of PWR and BWR
IV. Applications and Flexibility
V. Conclusions
2

3. Changes Affecting Training
• Emergency response organization (ERO) staffing
changes
• Knowledge, skills and proficiency requirements
• Severe accident management guideline (SAMG)
changes
• Extensive damage mitigation guideline (EDMG)
changes
3

4. Change Drivers
• Post-9/11 revisions to NUREGs/FEMA REP
• Post-Fukushima initiatives
– NEI 12-01 – Guideline for assessing beyond design basis
accident response staffing and communications capabilities
– NEI 12-06 – Diverse and flexible coping strategies (FLEX)
implementation guide
– INPO IER 13-10 – Nuclear accident at the Fukushima Daiichi
nuclear power station
– US NRC SECY-11-0124 - “Recommended actions to be taken
without delay from the near-term task force report”
4

5. Challenges for Industry
• Near-term challenges
– Develop, write, train and drill on new SAMG/EDMG
processes and procedures
– Install, maintain, train and drill on FLEX equipment
– Increase in number of staff needing training/drills
– Multiple-unit scenarios with single-unit simulators
– More challenging PRA/PSA
• Long-term challenges
– SBO and beyond DBA scenarios
– Limited simulator capabilities
– Integrated training of NOP, EOP, SAMG and EDMG
5

6. GSE Desktop Simulator
• Used by EPRI and ERIN Engineering to demonstrate
capability of MAAP5 computer code “Modular Accident
Analysis Program”
• Users easily interact with equipment controls and code
models through modern human-machine interface
• Interface with plant DOSE model to project offsite DOSE
• Users visually observe the event unfolding via graphical
depiction of scenarios
6

7. GSE Desktop Simulator
• Take plant data and run myriad SAMG/EDMG scenarios
• Simulate parallel events in multiple units
• Provide “what if” analysis of user-interactive actions and
resulting consequences
• Provide interactive access to all model internal variables
• Assist with verification/validation of results against plant
data
• Collect, assimilate and report a large amount of data
7

8. PWR with 2 Units and Spent Fuel
Ex-plant DOSE
simulation
MAAP5
In-plant
DOSE simulation
In-plant
DOSE simulation
Unit 2
Containment
MAAP5
Unit 1
Containment
MAAP5
SG
MAAP5
RCS
MAAP5
Core
Auxiliary
Building
MAAP5
Spent Fuel Pool
RCS
MAAP5
SG
MAAP5
Core
8

9. Reactor Core
Unit 1
Time 4:2:56
Unit 2
9

10. Containment and Flammability
Time 4:2:56
10

11. Off-Site Radiological Dose
Time 6:20:06
11

12. Multi-Unit Displays
12

13. Vessel Failure – Unit 1
13

14. Core Melt – Unit 2
14

15. Core Melt – Unit 3
15

16. Applications
Can be:
–
–
–
–
Run as stand-alone machine for individual use
Synched with other desktop simulators
Controlled/managed by an instructor
Used for training as individuals or teams
16

17. Flexibility and Growth
• Can add additional modules, such as:
–
–
–
–
–
–
Balance of plant
ECCS
Electrical
Main steam
Main feed water
MIDAS, RASCAL
• Advanced 3D visualizations coupled with simulation
models can be added to inform the user of conditions
inside containment and reactor during severe accident
scenarios
• Can integrate with your simulator
17

18. Conclusions
• Provides cost saving and lessens burden imposed by
regulations
• Allows frequent and realistic training
• Uses the most advanced analysis models as daily
training tools
• Backed and supported by reputable engineering/simulator
teams
• Streamlines data communications
18

19. Conclusions
• Prepares personnel
– Supports operational decision making to support
transient analysis
• Supports development and implementation of
challenging and realistic drills
• Does not require plant simulator time
• Supports remote training
19

20. 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."
20

21. GSE Systems, Inc.
Thank you!
21

22. For more information:
Go to:
www.GSES.com
Follow us on:
Call:
800.638.7912
Twitter @GSESystems
Email:
info@gses.com
Facebook.com/GSESystems