Transient Analysis of a Hydrogen-Desalination Cogeneration Nuclear Power Plant: Accident Scenarios within the Hydrogen Production Plant
NURETH-14 - 2011 September 25-30

Presented at:
2011 September 25-30
Toronto, Canada
Session Title:
G4-2 - Gas Cooled Fast Reactors and Very High Temperature Reactors; System Calculations

Hyung Gon Jin (KAIST)
Hee Cheon No (KAIST)
Young Soo Kim (KAIST)
Ho Sik Kim (KAIST)


The WHEN (Water-Hydrogen-Electricity Nuclear gas-cooled reactor) system is an integrated

system based on a nuclear power plant coupled with desalination and hydrogen production. The

WHEN system integrates the HELP (High-Economical Low-Pressure) IS (Iodine- Sulfur) cycle

for hydrogen production and the CD (Capacitive Desalination) + MED (Multi Effect Distillation)

Hybrid system for desalination on top of the HTGR (High-Temperature Gas-cooled Reactor),

which generates electricity. The WHEN system can enhance energy utilization by as much as

70%, and it can be flexibly designed according to various user needs. When we operate this type

of cogeneration nuclear power plant, the load balance of each system is critical for the

continuous operation of the entire system. A set of transient scenarios was simulated using a

system analysis code (the GAMMA code), which can take into account the flow path design of

hydrogen production coupling, i.e., undercooling and overcooling transients that are initiated in

the hydrogen production plant. From the results of a safety analysis, we confirmed that the

undercooling and overcooling transients initiated in the IS cycle do not lead any serious safety

problems on the WHEN system.

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