SM reactor after core modernization

The modernization purpose was to make possible the irradiation testing of structure materials for power water fission and fusion reactors at a damage rate of ≥ 20 dpa, helium accumulation rate > 1000 appm per year and fast neutron dose - 100 dpa and more. At the same time, conditions must be created for simultaneous irradiation of representative sample arrays in water environment with necessary chemical parameters at a temperature regulated in the range 100-300 deg. C and pressure up to 17 MPa by using irradiation rigs well-instrumented with devices for on-line parameters monitoring, and temperature and neutron spectrum control. Actually, it was necessary, in addition to the available irradiation positions, to provide places for loop and capsule channels of large diameters, which replaced some part of fuel without significant changes of the reactor design and operational procedures