Highly active liquid waste, which is generated by the reprocessing of spent nuclear fuel, is stored in storage tank of Tokai Reprocessing Plant until it is vitrified. The waste solution in the tank is periodically agitated to avoid the precipitation of insoluble residues during the storage. Three way valves and ball valves have been located at the tank for agitation. Radiation dose rate at the valve location is high and operator’s radiation exposure become a problem. Therefore, measures to reduce radiation ...
英字タイトル:
Dose reduction measure in exchange work of valves used for agitation of highly active liquid waste in storage tank

Abstract This paper presents steady-state Eulerian thermal analysis of welds using moving coordinates that has been reported as computationally very efficien t method. This method requires much less CPU time than conventional Lagrangian method in which heat source moves in computational domain. This kind of Euleri an analysis can be done conveniently by using computational fluid dynamics code. To show the availability of this method, it is applied to a groove weld of a core shroud in a boiling water react...
英字タイトル:
High Speed Thermal Analysis on Moving Heat Source using CFD code