METHOD FOR EVALUATING ACTIVATED RADIOACTIVITY AND SYSTEM FOR EVALUATING ACTIVATED RADIOACTIVITY

PROBLEM TO BE SOLVED: To provide an efficient method for evaluating activated radioactivity with effective accuracy for advance planning.SOLUTION: A method for evaluating activated radioactivity includes: a first input step S01 of inputting a neutron spectrum at each object position, an irradiation period, a cooling period, and a material composition of each object portion; a selection step S02 of selecting and inputting a typical neutron spectrum and a typical neutron fluence rate; a second input step S03; an activation calculation step S04 of calculating and storing the amount of activated radioactivity on the basis of the neutron spectrum at each object position, the irradiation period, the cooling period, and the material composition of each object portion, the typical neutron spectrum and the typical neutron fluence rate; and data storage steps S05 and S06. The method further includes: a step S09 of a multistep arithmetic processing for each nuclide by calculating and accumulating the activation reaction rate for each nuclide on the basis of the neutron spectrum at each object position and the activated radioactivity data; a step 10 of accumulating for each object portion, and a step S11 of determining the nuclide and a step S12 of determining the object position for determination whether one round is complete.