Abra low-middle radioactive waste disposal site accident emergency radioactive diffusion-preventing system

Abstract

The invention discloses an abra low-middle radioactive waste disposal site accident emergency radioactive diffusion-preventing system which comprises a diffusion-preventing ventilating system and a solid pollutant cleaning and packing apparatus, wherein the diffusion-preventing ventilating system comprises a No.1 ventilating shaft and a No.2 ventilating shaft, a smoke discharge channel, a ventilating channel and a mechanical ventilating device; the smoke discharge channel is a sealed spaced at the tops of a tunnel top plate and a tunnel, the middle of the sealed space is arranged by being vertical to a separation plate, the separation plate divides the sealed space into a normal smoke discharge channel and an accident smoke discharge channel, the normal smoke discharge channel and the accident smoke discharge channel are respectively communicated with the No.1 ventilating shaft, the ventilating channel comprises a normal ventilating channel and an accident ventilating cannel, the normal ventilating channel and the accident ventilating channel are respectively communicated with the No.2 ventilating shaft, and the accident smoke discharge channel and the accident ventilating channelare internally provided with radioactive filtering devices. The system disclosed by the invention not only can meet the requirement of ventilating and smoke discharge of a disposal repository in a normal operation state, but also can prevent diffusion of radioactive wastes in an accident emergency state.

Description

technical field [0001] The invention belongs to the technology of underground nuclear power plants, and specifically refers to an accident emergency radioactive proliferation prevention system of a low and intermediate radioactive waste disposal site in a rock cave. Background technique [0002] The cavern type low and intermediate radioactive waste disposal site is located in the underground space tens of meters to hundreds of meters deep. The disposal area generally has a combination of tunnel type, silo type, and tunnel silo. The disposal area is connected to the ground facilities through two tunnels. connected. Low and intermediate level waste packages are transported to the disposal area by transport vehicles. Through the analysis of various possible accidents during the operation of the disposal site, the most credible accident occurred during the transportation and hoisting of waste packages. Accidents that may occur during the transportation of waste packages are c...

AI Technical Summary

Problems solved by technology

There is also a possibility that during the decades of operation of the repository, the waste packaging is rusted or decomposed by microorganisms to produce gas, and the gas carries radioactive particles and pollutes the disposal area in the form of aerosols

[0003] The above possible accidents all require dust removal and filtration of radioactive solids and aerosols, and reconditioning of waste packages. Currently, the domestic operating disposal sites are all near-surface disposal sites, and the solid waste formed after the waste package is damaged can be collected again. , but the gaseous waste can only be allowed to spread, and the general tunnel fire prevention and smoke exhaust facilities do not consider the limitation of radioactive waste

Images