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Numerical simulation of an explosion in a small-scale replica of a Fast Breeder Reactor

Robbe M. F., Lepareux M., Cariou Y., Treille E.

Computer Assisted Mechanics and Engineering Sciences

2005

Vol. 12, No. 4

413-442

A Core Disruptive Accident in a Liquid Metal Fast Breeder Reactor (LMFBR) results from the interaction between molten fuel and liquid sodium, which creates a high-pressure bubble of gas in the core. The violent expansion of this bubble loads and deforms the vessel and the internal structures. The MARS experimental test simulates a hypothetical Core Disruptive Accident in a small-scale mock-up containing all the significant internal components of a LMFBR. This paper presents a numerical simulation of the test with the EUROPLEXUS code.

Numerical simulation of an explosion in a simple scale model of a nuclear reactor

Robbe M. F., Lepareux M., Treille E., Cariou Y.

Computer Assisted Mechanics and Engineering Sciences

2002

Vol. 9, No. 4

489-517

In the case of a Hypothetical Core Disruptive Accident (HCDA) in a Liquid Metal Fast Breeder Reactor, it is assumed that the core of the nuclear reactor has melted partially and that the chemical interaction between molten fuel and liquid sodium creates a high pressure gas bubble in the core. The violent expansion of this bubble loads and deforms the reactor vessel, thus endangering the safety of the nuclear plant. The experimental test MARA 8 simulates the explosive phenomenon in a mock-up enclosed in a flexible vessel with a flexible roof. This paper presents a numerical simulation of the test and a comparison of the computed results with the experimental results and previous numerical ones.