LOCA TEMPERATURE HYDROGEN GENERATION PARAMETRIC STUDY FOR ITER TAC4 DESIGN

A parameter study of the transient thermal response of the recent Inte rnational Thermonuclear Experimental Reactor design was performed for unmitigated loss of coolant accidents (LOCAs). Inboard component tempe ratures and hydrogen production levels remained low for an unmitigated blanket cooling system LOCA. Adding an unmitigated LOCA of the vacuum vessel cooling system to the blanket cooling system LOCA scenario res ults in much higher first wall temperatures and the production of flam mable and, eventually, detonatable amounts of hydrogen in the plasma c hamber.