The present invention relates to a method for measuring radioactivity of radioactive waste, the method comprising an adsorption step (A) of selectively adsorbing a radioactive substance comprising at least one from among radioactive iodine and radioactive cesium from radioactive waste containing radioactive substances on an adsorption member for adsorbing a radioactive substance, and a measurement step (B) of measuring radioactivity of the radioactive substance.

The present invention relates to a method for measuring radioactivity of radioactive waste, the method comprising an adsorption step (A) of selectively adsorbing a radioactive substance comprising at least one from among radioactive iodine and radioactive cesium from radioactive waste containing radioactive substances on an adsorption member for adsorbing a radioactive substance, and a measurement step (B) of measuring radioactivity of the radioactive substance.

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.

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.

System and methods for calibrating gamma ray tools using blanket field calibrator models is provided. A counting rate of a first gamma ray tool is simulated based on a model of a first blanket calibrator. When it is determined that the simulated counting rate matches a measured counting rate associated with the first gamma ray tool, a tally multiplier and a corresponding material specification for the model of the first blanket calibrator is determined. A counting rate for a second gamma ray tool is simulated based on the tally multiplier and the material specification determined for the model of the first blanket calibrator. A sensitivity factor for the second gamma ray tool is determined based on the simulation. The second gamma ray tool is calibrated according to a nominal blanket activity calculated from the sensitivity factor of the second gamma ray tool.

System and methods for calibrating gamma ray tools using blanket field calibrator models is provided. A counting rate of a first gamma ray tool is simulated based on a model of a first blanket calibrator. When it is determined that the simulated counting rate matches a measured counting rate associated with the first gamma ray tool, a tally multiplier and a corresponding material specification for the model of the first blanket calibrator is determined. A counting rate for a second gamma ray tool is simulated based on the tally multiplier and the material specification determined for the model of the first blanket calibrator. A sensitivity factor for the second gamma ray tool is determined based on the simulation. The second gamma ray tool is calibrated according to a nominal blanket activity calculated from the sensitivity factor of the second gamma ray tool.

A method for detecting a radionuclide using energy spectrum data represented by a count depending on energy obtained from a radiation detector, including: calculating a count ratio for a particular energy value using a background energy spectrum data measured without a target object to detect the radionuclide and a target energy spectrum measured in the presence of the target object; and comparing a background count ratio and a target object count ratio, where the count ratio is a ratio of a low count sum of count values which is an energy value or less divided by a high count sum of the count values which is greater than the particular energy value, or a ratio of the low count sum of the count values which is smaller than the particular energy value divided by the high count sum of the count values which is the particular energy value or greater.

A method for detecting a radionuclide using energy spectrum data represented by a count depending on energy obtained from a radiation detector, including: calculating a count ratio for a particular energy value using a background energy spectrum data measured without a target object to detect the radionuclide and a target energy spectrum measured in the presence of the target object; and comparing a background count ratio and a target object count ratio, where the count ratio is a ratio of a low count sum of count values which is an energy value or less divided by a high count sum of the count values which is greater than the particular energy value, or a ratio of the low count sum of the count values which is smaller than the particular energy value divided by the high count sum of the count values which is the particular energy value or greater.

A system for inspecting a moving person comprises an x-ray source, disposed in a fixed position with respect to the moving person, to generate one or more scanning x-ray beams. Each of the one or more x-ray beams being obliquely incident on either a front of the moving person, a rear of the moving person, or both. The system further comprises one or more backscatter detectors arranged to detect radiation scattered from the moving person, and to produce a detection signal therefrom. The system further comprises a processor and a memory with computer code instructions stored thereon. The memory is operatively coupled to the processor such that, when executed by the processor, the computer code instructions cause the system to produce a backscatter image based on the detection signal. When two or more x-ray beams are implemented, the two or more x-ray beams are temporarily interleaved to prevent crosstalk.

A system for inspecting a moving person comprises an x-ray source, disposed in a fixed position with respect to the moving person, to generate one or more scanning x-ray beams. Each of the one or more x-ray beams being obliquely incident on either a front of the moving person, a rear of the moving person, or both. The system further comprises one or more backscatter detectors arranged to detect radiation scattered from the moving person, and to produce a detection signal therefrom. The system further comprises a processor and a memory with computer code instructions stored thereon. The memory is operatively coupled to the processor such that, when executed by the processor, the computer code instructions cause the system to produce a backscatter image based on the detection signal. When two or more x-ray beams are implemented, the two or more x-ray beams are temporarily interleaved to prevent crosstalk.