A casing for radiation doping of silicon

The casing is designed for silicon crystal doping with phosphorus in a nuclear reactor. It enables the silicon crystals to be hydraulically transported into the irradiaton channel, and in the channel to be directly cooled with water. The casing is a body whose bottom is equipped with a valve formed by a disk with a shank and containing at least one hole; the lid of the body also contains at least one hole and can also be equipped with a valve. During the hydraulic transport of the casing in the horizontal and vertical segments of the transport piping, water cannot pass through it. As the casing reaches the bottom of the channel, the valve opens automatically and allows water to cool the crystal. If the lid is also fitted with a valve, the casing can be irradiated in the reverse position, i.e. with the lid against the bottom of the irradiation channel. (P.A.)