Abstract: By using information collected on-site, estimation of a damage area at that time and also prediction regarding subsequent expansion of a disaster-affected area are performed. The estimation device includes a storage unit that stores an exposure calculation formula expressing an exposure amount, which is an integrated value of the concentration of a material with respect to time, at a certain time and a certain position, by using the diffusivity and flow rate of the material; an information-acquisition unit that acquires position information of disaster victims at a prescribed time as input information; and a calculation unit that obtains a critical value of the exposure amount by applying the position information of each disaster victim at the prescribed time to the exposure calculation formula and that specifies the disaster-affected area at the prescribed time on the basis of the exposure calculation formula for when the critical value is obtained.

Abstract: A generation source estimation apparatus of a diffusion material is featured by including: an observation information acquisition section which acquires position information, and measured concentration information from each of the observers; a virtual grid setting section which sets virtual discharge points on a virtual grid; an influence function calculation section which calculates influence functions; a residual norm calculation section which calculates, for each of the virtual discharge points, a residual norm that is the sum of squares of a difference between the concentration information acquired from each of the observers, and the product of the influence function associating the virtual discharge point with each of the observers, and the discharge intensity at the virtual discharge point; and an estimation section which estimates, as a discharge point, the virtual discharge point corresponding to the residual norm smallest among the residual norms calculated respectively for all the virtual discharge

Abstract: A neutron moderator includes a neutron generator; a neutron moderating material arranged on one side of the neutron generator; a gamma ray shielding material covering an external surface of the neutron moderating material; and a thermal neutron absorbing material covering the external surface of the neutron moderating material except a side where the neutron generator is arranged.

Abstract: By using information collected on-site, estimation of a damage area at that time and also prediction regarding subsequent expansion of a disaster-affected area are performed.

Abstract: A nuclear material detection device that can detect a nuclear material with high accuracy is provided. The nuclear material detection device (10) detects a nuclear material contained in an object under inspection A to be inspected. A neutron detection sensor (1) is disposed so as to oppose the object under inspection A and detects neutrons emitted from the nuclear material. The neutron detection sensor (1) can detect the two-dimensional position of the source of neutrons emitted from the nuclear material.

Abstract: A neutron moderator includes a neutron generator; a neutron moderating material arranged on one side of the neutron generator; a gamma ray shielding material covering an external surface of the neutron moderating material; and a thermal neutron absorbing material covering the external surface of the neutron moderating material except a side where the neutron generator is arranged.

Abstract: Provided are a security gate system and a security gate control method capable of accurately inspecting inspection targets in a short period of time. The security gate system includes a main route 2; a mass spectrograph 3 for analyzing a sample (for example, a ticket) obtained from an inspection target (for example, a facility user at an airport, etc.) moving in the main route 2; at least one branch route 10 that is divided from the main route 2 at the downstream side of a position where the sample is obtained in the moving direction of the inspection target; gates (a first gate 5 and a second gate 6), which are provided at branch sections of the branch route 10 for switching a flow path of the inspection target; and a control apparatus 20 for performing control to switch between the gates 5 and 6 based on an analysis result of the mass spectrograph 3.

Abstract: A gas-condition predicting device includes an auxiliary storage device for storing each atmospheric condition in association with gas flow-field data in a target area under the atmospheric condition; a meteorological-modeling unit for calculating, using a meteorological model calculation, meteorological parameters at a plurality of evaluation points defined in an enlarged area that includes the target area and that is larger than the target area; and an extraction unit for determining atmospheric conditions in the target area from the meteorological parameters calculated by the meteorological-modeling unit and extracting from the auxiliary memory device gas flow-field data corresponding to the atmospheric conditions.