DYNAMIC STRESS OF A LIQUID-METAL TARGET CONTAINER UNDER PULSED HEATING

In this report, the dynamic response of a liquid metal target containe r for pulsed spallation neutron sources have been simulated using both a commercial code and a self-developed program. The main features and differences of both programs are presented. A transient thermal analy sis was first examined with coupled and uncoupled heat equations. Temp erature distribution results showed that the coupling effect between t wo pulses can be neglected. Stress waves due to direct pulsing have be en calculated on the target container investigating the effects of loa ding rate and structure thickness. Results from the transient thermal- structural analysis showed that, due to inertia effects, the dynamic s tress in the target container is contributed mainly from direct heatin g in the initial time stage, and later from the pressure wave in the t arget liquid as it reaches the container wall.