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Calculation of CFBR-II’s Prompt Neutron Decay Constant at Delayed Criticality by the Simulated Burst-Neutron Method

Jinfeng Du

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Abstract

By calculating foreign benchmark assemblies prompt neutron decay constants at delayed criticality, it is proved that the results calculated is faithful by using the simulated burst-neutron method. CFBR-Ⅱ’s prompt neutron decay constants are calculated with the method at five subcritical states. The prompt neutron decay constant attained at delayed criticality is 0.55μs-1by linear extrapolation.There are difference between calculational result and the experimental result. The article simply analyses reasons for the difference.

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What this paper is about

By calculating foreign benchmark assemblies prompt neutron decay constants at delayed criticality, it is proved that the results calculated is faithful by using the simulated burst-neutron method. CFBR-Ⅱ’s prompt neutron decay constants are calculated with the method at five subcritical states. The prompt neutron decay constant attained at delayed criticality is 0.55μs-1by linear extrapolation.There are difference between calculational result and the experimental result. The article simply analyses reasons for the difference.

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Available abstract

By calculating foreign benchmark assemblies prompt neutron decay constants at delayed criticality, it is proved that the results calculated is faithful by using the simulated burst-neutron method. CFBR-Ⅱ’s prompt neutron decay constants are calculated with the method at five subcritical states. The prompt neutron decay constant attained at delayed criticality is 0.55μs-1by linear extrapolation.There are difference between calculational result and the experimental result. The article simply analyses reasons for the difference.

Key concepts: Criticality, Extrapolation, Neutron, Constant (computer programming), Physics, Nuclear physics, Exponential decay, Prompt neutron

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