Abstract

The knowledge of time dependent behaviour of neutron population is extremely important for any nuclear reactor operation from safety aspect. The reactor transient can be accurately predicted by solving time dependent neutron diffusion equations. A solution scheme based on implicit method has been implemented in NDIFF3D. The loss of regulation (LOR) transient in initial, intermediate and equilibrium core of AHWR has been simulated. The results have shown good agreement with the data calculated with 3DFAST.

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