摘要:
The invention relates to a device (1) for cleaning and/or securing a safe containment defined in a device for transporting and/or storing radioactive materials, which device includes active means capable of cleaning and/or securing said safe containment, and further comprising means forming a casing (2) with an opening (8) and defining a cavity (9) as well as means for closing (10) said opening, which device is designed so that said closure means are capable of being maintained in said closed position by a pressure difference between the inside and the outside of said cavity.
摘要:
A method for underwater packaging of radioactive materials includes creating a vacuum in a cavity of a cleaning device to automatically cause a portion of the cleaning device to move upward to actuate the cleaning device from an open position to a closed position; mounting the cleaning device inside a safe containment area of a transportation and/or storage device; placing the transportation and/or storage device in a pool after filling the safe containment area with water; loading a radioactive material into the safe containment area; closing the transportation and/or storage device using at least one cover; extracting the transportation and/or storage device from the pool; draining the water inside the safe containment area; and creating a pressure differential in the safe containment area to dry the safe containment area, wherein the pressure differential causes the cleaning device to automatically actuate from the closed position to the open position.
摘要:
A container for transport and storage of highly radioactive material, the container being made of thick metal and comprising a tube having an internal wall and a base having a lateral wall, the base being non-removably sealed to one end of the tube, and the internal wall and lateral wall forming a right cylinder with circular cross-section in contact with each other. The base is fixed to the container by shrink fitting the lateral wall with a portion of the internal wall in contact with the lateral wall, the base being disposed such that the lateral wall is entirely inside the tube with a portion of the internal wall comprising an opposed shoulder which cooperates with the corresponding shoulder in the lateral wall. A first continuous seam weld is provided on an external surface of the base in contact with the tube and a second continuous weld seem is provided on an internal surface of the base in contact with the tube.
摘要:
A packaging for the transportation and/or storage of nuclear materials, which includes a lateral body which extends along a longitudinal direction (X), where this body is equipped with a radiological protection device. The radiological protection device includes at least one radiological protection structure which includes at least one metallic reinforcement framework which extends along the direction (X) and which is hugged by a block made out of lead or of one of its alloys, cast over the framework, the latter being equipped with at least one element for retaining the cast block along the direction (X). Furthermore, the framework is embedded in the cast block over at least part of its length along this direction (X).
摘要:
Transport and storage of nuclear fuel assemblies may require double confinement depending on the circumstances. A device and a method are described to perform this double conditioning without the need of a hot containment, and in which the loading and pre-positioning steps can take place in a pool. The device (10) includes a metallic inner leak tight conditioning receptacle (20) and a metallic outer leak tight receptacle (30). When the inner receptacle (20) is located in the outer receptacle (30), a passage (15, 25) remains free between the two receptacles, from the open end to the bottom of the outer receptacle. The outer receptacle (30) can be drained through this passage, particularly by a dip tube (33).