Novel radioactive substance transport container

Abstract

The invention discloses a novel radioactive substance transport container. The novel radioactive substance transport container is characterized in that a shielding barrel is mounted on the inner bottom surface of a lower tank, the novel radioactive substance transport container further comprises an embedded bent pipe, the embedded bent pipe penetrates the side walls of the shielding barrel, the end, which extends into the shielding barrel, of the embedded bent pipe is an inner end, the lowermost point of the inner end of the embedded bent pipe is higher than the upper end surface of the bottom wall of the shielding barrel, the end, which extends out of the shielding barrel, of the embedded bent pipe is an outer end, and the uppermost point of the outer end of the embedded bent pipe is higher than the upper end surface of the bottom wall of the shielding barrel; the bottom wall and the side walls of the shielding barrel are divided into inner walls, lead sandwich layers and outer walls from the inside to the outside, low-alloy steel is rolled and welded to form the outer walls, and filling lead pigs are integrally heated to form the lead sandwich layers. The novel radioactive substance transport container has the advantages that radioactive substances with large sizes and tonnage and high dose can be packaged and transported by the container, and the novel radioactive substance transport container is applicable to hydraulic components of main pumps of nuclear power plants; container surface dose rates are lower than 2mSv / h after the hydraulic components are shielded by the container under the condition that the maximum surface dose rates of the hydraulic components are 600mSv / h, and dose rates of certain positions which are separated from the surfaces of the container by distances of 2m are lower than 0.1mSv / h.

Description

technical field [0001] The invention belongs to the field of safe transport of radioactive substances, and relates to a novel large-size, large-tonnage, high-dose radioactive material transport container, in particular to a transport container for transporting hydraulic components of a main pump of a nuclear power plant. Background technique [0002] The hydraulic part of the main pump of the nuclear power plant is the heart part of the main pump of the nuclear power plant. During actual operation, it has been in contact with the reactor coolant for a long time, forming fixed pollution on the surface. The dose rate of gamma rays is very high. Before decontamination, the measured side can reach 450mSv / h , The bottom reaches 600mSv / h. In order to ensure the safe operation of the nuclear power plant, the hydraulic components must be regularly sent to the maintenance station for maintenance. This requires the use of special containers for packaging and transportation of the hydr...

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Problems solved by technology

[0003] Due to the large volume, heavy weight and high dosage of the hydraulic components of the main pump of the nuclear power plant, the design of the transport container is difficult, and the manufacturing and inspection requirements are high. At present, there is no such special transport container in China. It is necessary to rent foreign shipping containers, not only the rent is expensive, but also the shipping costs are a huge expense

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