Device suitable for flushing surface of spent fuel dry-method storage container

Abstract

The invention belongs to the technical field of mechanical design, and particularly relates to a device suitable for flushing the surface of a spent fuel dry-method storage container. The device comprises a flushing water tank, flushing supports, flushing sprayers, flushing pipes and quick connectors; and the multiple flushing pipes form a loop through the quick connectors, each flushing pipe is provided with one flushing sprayer and one flushing support used for fixing, and one flushing pipe is connected with the flushing water tank. Radiation risks and industrial risks caused by the fact that personnel stand beside a spent fuel pool to flush the surface of the storage container are avoided, the surface pollution level of the full-load spent fuel container meets the radioactive substancetransportation standard in a nuclear power plant, meanwhile, the radiation dosage borne by the personnel when the personnel flush the storage container is reduced, the operation time of the personnelduring near-edge operation is shortened, risks of the personnel during near-edge operation are reduced, the operation process is optimized, and the safety of the personnel and equipment is ensured.

Description

technical field [0001] The invention belongs to the technical field of mechanical design, and in particular relates to a device suitable for surface flushing of spent fuel dry storage containers. Background technique [0002] In the early stage of construction of a nuclear power plant, a pool for storing spent fuel was built. Due to the limitation of the storage capacity of the spent fuel pool, with the increase of the operating life of the unit, the number of spent fuel components produced increased year by year. Conventional storage can no longer meet the rapid development of China's nuclear power industry. develop. With the development and utilization of China's nuclear power technology, the domestic nuclear power industry has gradually introduced, digested, absorbed and implemented the dry storage technology of spent fuel. [0003] In the dry storage process, the dry storage container needs to be put into the spent fuel pool, and the burned spent fuel is loaded into the...

AI Technical Summary

Problems solved by technology

Since the spent fuel pool contains radioactive particles and hot particles with high radiation doses are very easy to attach to the outer surface of the storage container, when the storage container is hoisted out of the spent fuel pool, in order to ensure that the pollution level of the outer surface of the storage container meets the on-site transportation standard, now The stage method is to arrange two flushing personnel to carry out spray guns in the process of lifting the container from the refueling well to wash the surface of the container at 360 degrees all the time. After the storage container is loaded with spent fuel assemblies, it is lifted to above the liquid level of the spent fuel pool. , due to the lack of good shielding of water, the radiation level of the storage container will gradually increase, even if the personnel have been working all the time, it is impossible to ensure that every part of the container surface can be rinsed in place

Moreover, due to the high radiation level on the surface of the container, there are also potential radiant heat particles, and it is easy to produce high doses of radiation to the surrounding flushing personnel. In addition, personnel need to stand by the pool to manually flush the surface of the container. There is also a large industrial Safety risks also bring challenges to the first-level anti-foreign body requirements in nuclear fuel pools

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