Computational Fluid Dynamics Model for Liquid Poison Injection in the ACR-1000® Design
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Abstract
The Advanced CANDU Reactor (ACR-1000) Shutdown System 2 is capable of quickly rendering the reactor core subcritical by injecting a neutron absorbing solution (poison) into the heavy water moderator via injection nozzles. A Computational Fluid Dynamics (CFD) model has been developed to simulate the poison injection into the moderator. This paper presents the model development and preliminary results to demonstrate its feasibility to the ACR-1000 design. The CFD model has been validated against the test data from the CANDU 6 LISS test. Validation tests based on the ACR-1000 design are underway, in which the poison concentration distribution will be measured.
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