Accelerator driving subcritical device with cladding type reactor core structure

Abstract

The invention discloses an accelerator driving subcritical device with a cladding type reactor core structure. The accelerator driving subcritical device adopts a modularization design concept, fuel components are changed to be fuel cladding layers, and an external neutron source is separated from a reactor core part. An external neutron source target and the fuel cladding layers are cooled by using independent loops, so that the target can be cooled by using a coolant different from the fuel, and the design flexibility is improved. The all fuel cladding layers share an electromagnetic pump and a heat exchanger, and another system is used for standby application. Fuel cladding layer cooling loops are connected through concentric tubes, so that the arrangement number of pipelines is reduced. The fuel cladding layers and the external neutron source are all arranged inside a protection container, so that the multiple barriers can be realized. Meanwhile, in the protection container, the cladding layers are externally filled with inert gas, the breakage of the cladding layers can be judged through the pressure of the inert gas under normal work condition, a reactor core is stopped and residual heat is discharged by directly filling the coolant under the accident work condition. Control rod systems are distributed in gaps between the fuel cladding layers.

Description

technical field [0001] The invention relates to the technical field of an accelerator-driven subcritical system, in particular to an accelerator-driven subcritical device with a cladding core structure. Background technique [0002] Nuclear energy is an important part of the national strategy. However, the development of nuclear energy faces two major constraints. One is the disposal of spent fuel, but the multiplication of nuclear fuel. On the one hand, in spent fuel, there are a large number of long-lived fission products and a large number of minor actinide (MA) nuclides, which are not only highly radioactive, but also extremely long-lived, and the lifetime of some nuclides can even reach 10 4 ~10 7 year. The usual international practice is to directly bury it deep in the earth after volume reduction and solidification, but it still cannot solve the radioactive risk problem. The long-lived fission products and MA still pose a great safety threat to the environment and f...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is: in order to solve the difficult problems of spent fuel treatment and nuclear fuel multiplication, and overcome the difficult problems of complex structure, high cost and difficult operation, the present invention designs an accelerator-driven subcritical device with a clad core structure. It has the advantages of simple maintenance, subcritical safety, overall replacement of the modular core, no need for a refueling machine, and avoiding small breaches, etc.

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