Patent ID: 8203128
Filing Date: 2012-06-19
Classification: G21F

Abstract:
1. A radiation source container that accommodates a radiation source, comprising: a radiation source capsule; a radiation source holder including an aperture that emits unidirectionally radiation emitted from a radiation port of said radiation source capsule, that provides screening such that no leakage of said radiation takes place except from said aperture, and that fixes said radiation source capsule in a manner that is difficult to attach or detach; an irradiation window that transmits radiation emitted from said aperture; an attenuation plate provided between said radiation port of said radiation source capsule and said irradiation window, that attenuates an amount of radiation emitted from said radiation source capsule prior to reaching said irradiation window; a shutter provided between said attenuation plate and said irradiation window and that screens a radiation emitted from said irradiation window; and a capsule cover whereby, when a recommended use period in respect of a sealing performance of said radiation source capsule has expired, said attenuating plate is removed and said radiation port of said radiation source capsule is resealed with one having same material properties and same thickness as said removed attenuating plate, entirely covering said radiation source capsule.