PROBLEM TO BE SOLVED: To provide a &gamma-ray/neutron-beam irradiation device for medical use having easy handleability and excellent work efficiency, capable of obtaining a desired radiation flux distribution shape.SOLUTION: This radiation irradiation device includes: an irradiation source part 30 for irradiating an irradiation object with a radiation a reactor 10 a neutron irradiation capsule 20 installed in the reactor 10 an introduction pipe 40 for connecting the irradiation source part 30 to the neutron irradiation capsule 20, and introducing radioactive isotope-including solution into the neutron irradiation capsule 20 and a lead-out pipe 50 for connecting the irradiation source part 30 to the neutron irradiation capsule 20, and leading out the radioactive isotope-including solution after being subjected to neutron irradiation from the neutron irradiation capsule 20. In the device, the radioactive isotope-including solution subjected to neutron irradiation in the reactor 10 is conveyed to the irradiation source part 30 through the introduction pipe 40, and is used as an irradiation source for irradiating the irradiation object 108 with a radiation, and thereafter, the radioactive isotope-including solution is returned into the neutron irradiation capsule 20 through the lead-out pipe 50, and is subjected again to neutron irradiation.COPYRIGHT: (C)2011,JPO&INPIT【課題】取り扱いが容易で、作業性に優れ、所望の放射線フラックス分布形状を実現できる医療用γ線・中性子線照射装置を提供する。【解決手段】被照射体に放射線を照射する照射線源部30と、原子炉10と、原子炉10内に設置した中性子照射キャプセル20と、照射線源部30と中性子照射キャプセル20とを連結し放射性同位元素含有溶液を中性子照射キャプセル20に導入する導入配管40と、照射線源部30と中性子照射キャプセル20とを連結し中性子照射キャプセル20から中性子照射後の放射性同位元素含有溶液を導出する導出配管50と、を具備し、導入配管40を介して、原子炉10内で中性子照射された放射性同位元素含有溶液を照射線源部30まで搬送し被照射体108に放射線照射する照射線源として使用し、その後、導出配管50を介して放射性同位元素含有溶液を中性子キャプセル20内に戻して再び中性子照射することを特徴とする放射線照射装置。【選択図】図1
