Radiation protection structure for spent fuel transport ship

Abstract

The invention aims to disclose a radiation protection structure for a spent fuel transport ship. The radiation protection structure comprises a cargo compartment area, wherein the cargo compartment area is at least provided with a cargo compartment capable of carrying one or more spent fuel cargo bags; shielding bodies are arranged at a cargo compartment cover, a prow transverse bulkhead, a close-to-stern transverse bulkhead and bulkheads on the two sides of the cargo compartment, and the shielding bodies are formed by combining one or more shielding materials selected from the group consisting of steel, concrete, polyethylene and fresh water in a layered mode. Compared with the prior art, the neutron-gamma ray composite shielding bodies are arranged in key areas of the cargo compartment,so comprehensive shielding of neutrons and gamma rays released by spent fuels is realized, the probability that radioactive particles penetrate out of the cargo compartment is reduced, the irradiationlevel of other areas of a ship outside the cargo compartment is reduced, and therefore, a irradiation dose received by crews in the transportation process of the spent fuels is reduced; and the shielding material is mature and economical, the weight of the shielding bodies is low, comprehensive neutron-gamma ray shielding effect is good, and the purpose of the invention is achieved.

Description

technical field [0001] The invention relates to a radiation protection structure of a transportation ship, in particular to a radiation protection structure of a spent fuel transportation ship used for a radioactive material transportation ship. Background technique [0002] The capacity of the fuel storage pool built into the nuclear power plant is limited, and generally can only meet the storage needs of the spent fuel discharged within more than ten years, while the design life of the nuclear power plant is 40-60 years. At present, many nuclear power plants in my country are already facing the problem of insufficient in-plant storage capacity. In the future, the amount of spent fuel produced in my country will continue to increase year by year. Therefore, the safe transportation of spent fuel to reprocessing plants is important and urgently needed for the development of nuclear energy in my country. [0003] Spent fuel refers to the irradiated nuclear fuel discharged from...

AI Technical Summary

Problems solved by technology

The existing structural design cannot achieve the effect of reducing neutrons and gamma rays at the same time, the radiation level in most areas of the ship is still high, and the radiation exposure level received by the crew during the transportation of spent fuel increases

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