The invention relates to the technical field of
thyristor operation reliability analysis, in particular to a
system and a method for testing
electrical performance attenuation of a high-power
thyristor under
neutron irradiation. According to the technical scheme, the device comprises an
irradiation area subsystem located in a heavy
lead shielding body and a testing area subsystem located outside the heavy
lead shielding body, and an artificial
neutron source, a stepped sample testing frame, a current-limiting
resistor and a sampling
resistor connected with the ground are arranged in the
irradiation area subsystem; a first
thyristor group, a second thyristor group and a third thyristor group are respectively mounted on the stepped sample testing frame, and each of the first thyristor group, the second thyristor group and the third thyristor group is formed by annularly distributing four tested high-power thyristors by taking an artificial
neutron source as a center. According to the invention, the real-time online monitoring of the
electrical performance attenuation condition of the high-power thyristor under
neutron irradiation is realized, the synchronous test of the
electrical performance attenuation of the high-power thyristor caused by different neutron
fluence can be realized, the
test efficiency is high, and the test cost is low.