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.