Abstract: A neutron producing target is irradiated with a deuteron beam accelerated by a deuteron accelerator to generate neutrons, and first samples are directly irradiated with the fast neutrons produced in the neutron producing target. The fast neutrons, which have initially been scattered by a nuclear reaction in the first samples and have passed through the first samples, are multi-scattered by a neutron scattering material made of a light element disposed around the neutron producing target and the first samples to generate, by a nuclear reaction with the first samples and second samples, various radioisotopes in large amounts at the same time from the first samples and the second samples. Thereby, a new RI production technology can generate various radioisotopes in large amounts at the same time.

Abstract: An irradiation target is formed into a sphere. The spherical irradiation target can be iridium metal containing natural or enriched iridium. The radiation source can be manufactured by manufacturing a spherical irradiation target, accommodating the spherical irradiation target in a rotating capsule, and rotating an axial flow impeller by a downward flow of a reactor primary coolant, whereby the rotating capsule is rotated. This radiation source provides an improved nondestructive inspection image having a high geometric resolution, and has no radiation source anisotropy and also has high target recyclability.

Abstract: An irradiation target is formed into a sphere. The spherical irradiation target can be iridium metal containing natural or enriched iridium. The radiation source can be manufactured by manufacturing a spherical irradiation target, accommodating the spherical irradiation target in a rotating capsule, and rotating an axial flow impeller by a downward flow of a reactor primary coolant, whereby the rotating capsule is rotated. This radiation source provides an improved nondestructive inspection image having a high geometric resolution, and has no radiation source anisotropy and also has high target recyclability.

Abstract: Dosimeters 140 are housed in dosimeter housing pockets 130 of a dosimeter fitting wear including: wear main bodies 120, 150 which cover measuring positions on at least subject bodies 100, 102, and 110, and can be detachably fitted on the subject bodies, and the dosimeter housing pockets 130 provided at positions that come to the measuring positions when the wear main bodies are fitted on the subject bodies, and then the wear main bodies are fitted on the subject bodies. Thereby, a number of dosimeters can be easily fitted on or detached from the surfaces of subject bodies without hindering medical activities, and set positions of the dosimeters can be easily reproduced.

Abstract: Dosimeters 140 are housed in dosimeter housing pockets 130 of a dosimeter fitting wear including: wear main bodies 120, 150 which cover measuring positions on at least subject bodies 100, 102, and 110, and can be detachably fitted on the subject bodies, and the dosimeter housing pockets 130 provided at positions that come to the measuring positions when the wear main bodies are fitted on the subject bodies, and then the wear main bodies are fitted on the subject bodies. Thereby, a number of dosimeters can be easily fitted on or detached from the surfaces of subject bodies without hindering medical activities, and set positions of the dosimeters can be easily reproduced.

Abstract: A personal radiation dosemeter comprising a radiation detector means coupled to an electronic measurement circuit arranged in combination therewith to generate signals representative of an amount of radiation detected by the radiation detector. The radiation detector means is arranged to be screened from ambient light and is further provided with a light source optically coupled to the radiation detector and arranged to operate under control of a test control circuit to generate light of a wavelength which may be detected by said radiation detector. This arrangement provides, in combination with said electronic measurement circuit an integrity test for said radiation detector means.

Abstract: A personal radiation dosemeter comprising a radiation detector means coupled to an electronic measurement circuit arranged in combination therewith to generate signals representative of an amount of radiation detected by the radiation detector. The radiation detector means is arranged to be screened from ambient light and is further provided with a light source optically coupled to the radiation detector and arranged to operate under control of a test control circuit to generate light of a wavelength which may be detected by said radiation detector. This arrangement provides, in combination with said electronic measurement circuit an integrity test for said radiation detector means.