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MHTGR Inherent Heat Transfer Capability
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English
Abstract
The commercial Modular High Temperature Gas-Cooled Reactor (MHTGR) achieves improved reactor safety performance and reliability by utilizing a completely passive natural convection cooling system called the RCCS to remove decay heat in the event that all active cooling systems fail to operate. For the highly improbable condition that the RCCS were to become non-functional following a reactor depressurization event, the plant would be forced to rely upon its inherent thermo-physical characteristics to reject decay heat to the surrounding earth and ambient environment. A computational heat transfer model was created to simulate such a scenario. Plant component temperature histories were computed over a period of 20 days into the event. The results clearly demonstrate the capability of the MHTGR to maintain core integrity and provide substantial lead time for taking corrective measures.
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Citation
Berkoe, J., "MHTGR Inherent Heat Transfer Capability," SAE Technical Paper 929282, 1992, https://doi.org/10.4271/929282.Also In
References
- Berkoe, J.M. “Three Dimensional Thermal Analysis of MHTGR Passive Heat Removal System,” American Nuclear Society Winter Meeting San Francisco 1991
- Blomquist, R.N. et al “COMMIX-1 AR/P: A Three-dimensional Transient Single-phase Computer Program for Thermal Hydraulic Analysis of Single and Multi-component Systems - Volume 1,” Argonne National Laboratory Argonne, Illinois July 1991
- Kroeger, P.G. “Severe Accident Core Heatup Transients in Modular High Temperature Gas-Cooled Reactors Without Operating Reactor Cavity Cooling System,” International Conference on Safety of Advanced Reactors Seattle, Washington 1988