Molten salt reactor capable of realizing online refueling and refueling method ofmolten salt reactor

Abstract

The invention discloses a molten salt reactor capable of realizing online refueling and a refueling method of the molten salt reactor. The molten salt reactor capable of realizing online refueling comprises a protective container, a reactor container arranged in the protective container, a reactor core, a supporting mechanism and a hoisting mechanism, the supporting mechanism comprises a plurality of supporting rails which are arranged in parallel at intervals and stretch across the reactor vessel; the reactor core comprises a plurality of fuel assemblies arranged in the length direction of the supporting rail, and each fuel assembly comprises a fuel grid and a TRISO fuel ball contained in the fuel grid in the height direction of the fuel grid. The top of the fuel grid is suspended on the support rail; and the hoisting mechanism is located above the supporting mechanism. According to the molten salt reactor capable of realizing on-line refueling, the TRISO fuel ball is arranged in the vertical fuel grid to form a single fuel assembly, and the single fuel assembly is matched with the supporting mechanism and the hoisting mechanism over the fuel assembly to realize arrangement and movement of the fuel assembly in the reactor container, so that on-line refueling of the molten salt reactor and fine adjustment of the axial enrichment degree of the fuel assemblies are realized; and modular construction and power expansion are realized.

Description

technical field [0001] The invention relates to the technical field of nuclear power, in particular to an on-line refueling molten salt reactor and a refueling method thereof. Background technique [0002] The Molten Salt Reactor (MSR) is the only liquid-fueled reactor among the six Generation IV nuclear energy systems that can be used for power generation, transmutation of nuclear waste, hydrogen production, and production of nuclear fuel. Molten salt reactors include two technical directions. The first type is liquid fuel molten salt reactors, where fissile materials are dissolved in molten fluoride salts; the second type is solid fuel molten salt reactors, where molten fluoride salts are only used as coolants and fuel Using coated particles, similar to the fuel of the pebble bed HTR, the solid fuel type molten salt reactor is usually called a fluoride salt cooled solid fuel high temperature reactor (FHR). [0003] Taking the liquid fuel molten salt reactor as an example,...

AI Technical Summary

Problems solved by technology

However, the above-mentioned patents have the following problems: the coolant in the primary loop is forced circulation, the system flow is complicated, the molten salt pump, the key equipment, is technically difficult, expensive and easy to damage. Once the molten salt pump is damaged or the primary loop pipeline leaks, it will cause the core Loss of cooling in active zone causes severe nuclear accident

In this patent, the fission fuel molten salt is loaded in the fuel pipe, but the fuel molten salt is relatively corrosive to the fuel pipe. Once leaked, it will pollute the entire primary circuit coolant, which is not good for the control of radioactive substances, and it is difficult to collect and control the fission gas.

In addition, the fuel loading scheme is not introduced in the patent, and it is not clear whether it is necessary to shut down the reactor for refueling

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