Ex-reactor nuclear measurement instrument for nuclear reactor

The utility model provides an ex-core nuclear measurement instrument for a nuclear reactor, and relates to the field of ex-core nuclear measurement instruments, which comprises a protection cabinet and a control cabinet, the measuring range equipment comprises a detector, conditioning equipment and processing equipment which are connected in sequence; the detector is arranged in a containment of the nuclear reactor, and the conditioning equipment and the processing equipment are arranged in the protection cabinet; measuring range equipment measures the neutron fluence rate in a segmented manner; after the detector reacts with neutrons in the nuclear reactor, an electric pulse signal or a current direct-current signal is ionized, the ionized electric pulse signal or current direct-current signal is sent to the conditioning equipment, and a shaped pulse signal or voltage signal is generated and sent to the processing equipment for data operation processing and external communication; the processing equipment is