Power mapping in a Canada Deuterium Uranium reactor using Kalman filteringtechnique

For a Canada Deuterium Uranium 600 MWe (CANDU 6) reactor, a new power mappi ng method has been developed by using detector readings as boundary conditi ons. In this study, the measured detector readings are combined with the di ffusion theory with the Kalman filtering (DIKAL) method. The measured detec tor readings are transformed into the measured mesh flux through appropriat e approximation. And, the difference between calculated and measured mesh f lux is filtered out by Kalman filtering technique. Then, the measured mesh fluxes are used as an internal boundary condition in the diffusion equation . The performance of the DIE;AL method has been assessed for the various co re states, and has been also applied tr, the calculation of power and Aux d istribution calculation in the CANDU 6 reactor. Sensitivity studies have sh own that DIKAL is quite stable to the detector random and systematic errors . Also, it is shown that the DIKAL approach is more accurate than the curre ntly used flux synthesis approach in CANDU 6 reactors.