On solving the system of differential equations describing the fission product concentration change in a reactor

Obtained is the analytical solution for the system of differential equations describing the fission product concentration change listed in the form of a consecutive nuclei line starting from the lower number. It is noted that the solution obtained permits to determine the concentration of any fission product at any time in the arbitrary reactor operating regime taking into account practically all important ways of its production and disappearance. On the basis of the proposed algorithm the BESM-6 computer code is written