Abstract: A neutron flux measurement apparatus includes: a storage which records, as record data, a measured value indicating change in a neutron flux in a nuclear reactor corresponding to adjustment control for output of the nuclear reactor during a first set period; and a calculation circuitry which, on the basis of the record data, performs correction for a detector sensitivity to a neutron of a self-powered detector at a time point in accordance with the adjustment control during a second set period after the first set period, the time point being a time point when the second set period has elapsed, and derives the neutron flux at the time point using the corrected detector sensitivity.

Abstract: Provided is a radioactive contamination inspection device, including: a detection unit having a sensitive surface that has a shape conforming to a shape of an object surface, which is a measurement target and a radioactive contamination amount of which is to be measured; a mechanism unit for holding the detection unit in a state in which a distance from the sensitive surface to the object surface falls within a desired range set in advance; and a measurement unit for calculating the radioactive contamination amount of the object surface on the basis of a measurement result from the detection unit.

Abstract: Provided are a radiation measurement device and method that allow stable radiation measurement as compared with the prior art. The radiation measurement device includes a radiation detection unit 1 having a scintillator, an optical transmission member 21 for transmitting an optical signal generated in the radiation detection unit, and a signal processing unit 3 for calculating a radiation dose from the optical signal transmitted. The signal processing unit includes a compensation unit 7 for obtaining an optical transmission loss amount from a change in wavelength spectrum in the optical signal caused by radiation acting on the optical transmission member and performs compensation-control on the optical transmission loss amount, and outputs a compensated signal.

Abstract: Provided are a radiation measurement device and method that allow stable radiation measurement as compared with the prior art. The radiation measurement device includes a radiation detection unit 1 having a scintillator, an optical transmission member 21 for transmitting an optical signal generated in the radiation detection unit, and a signal processing unit 3 for calculating a radiation dose from the optical signal transmitted. The signal processing unit includes a compensation unit 7 for obtaining an optical transmission loss amount from a change in wavelength spectrum in the optical signal caused by radiation acting on the optical transmission member and performs compensation-control on the optical transmission loss amount, and outputs a compensated signal.