Accident-emergency radioactive-substance nonproliferation system of cave-type low-medium radioactive waste disposal site

Abstract

The invention discloses an accident-emergency radioactive-substance nonproliferation system of a cave-type low-medium radioactive waste disposal site. The system includes a nonproliferation ventilation system and a solid pollutant cleaning and packaging device, the nonproliferation ventilation system includes a first ventilation shaft, a second ventilation shaft, a smoke discharging channel, a ventilation channel and mechanical ventilation equipment, the smoke discharging channel is a confined space formed by a tunnel top plate and the top of the tunnel, a segregation board is vertically arranged in the middle of the confined space, the segregation board separates the confined space into a normal smoke discharging channel and an accidental smoke discharging channel, the normal smoke discharging channel and the accidental smoke discharging channel are communicated with the first ventilation shaft separately, the ventilation channel includes a normal ventilation channel and an accidental ventilation channel, the normal ventilation channel and the accidental ventilation channel are communicated with the second ventilation shaft separately, and radioactive-substance filtering devices are arranged in the accidental ventilation channel and the accidental smoke discharging channel. The accident-emergency radioactive-substance nonproliferation system of the cave-type low-medium radioactive waste disposal site can not only meet the ventilation and smoke discharging requirements of a disposal repository on the normal running condition but also prevent radioactive-waste proliferation on the accident-emergency condition.

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...

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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

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