WATER ACTIVATION IN A FUSION ENVIRONMENT

Water is activated in a fusion environment by the O-16(n,p)N-16 reacti on. In this work nuclear responses in the magnets, induced by gamma ra ys from the activated cooling water, for the current design of the Int ernational Thermonuclear Experimental Reactor (ITER), are calculated w ith a detailed Monte Carlo model of the chimney region through which t he cooling pipes leave the machine. It is found that, despite a signif icant dose, the nuclear responses induced by these gamma-rays do not p ose an obvious threat to the operation of the magnets.