Thermal Analysis on the Sealed Water Cell of Water Calorimeter

Many countries are developing the absorbed dose evaluation technique using the calorimetry. According to this need, research on development of water calorimeter and standard measurement method of absorbed dose is in progress in Korea. An initial step in the research on the development of a water calorimeter and standard measurement is ongoing by the Korea Research Institute of Standards and Science (KRISS). In parallel with the development of devices, we developed the calculation methodology about thermal behavior analysis of water calorimeter for radiation dosimetry. In this study, the geometry of the water phantom for the calorimeter is designed refers to the NIST model. To overcome the heat defect, sealed water core was applied. Simulation of the radiation transport and energy deposition and calculation of the thermal behavior of the sealed water core are carried out. To overcome the heat defect, sealed water core was applied and it could minimize the convection effect. The results of this study will be used as the basic data for development of the standard water calorimetry in KRISS