Liquid Metal Cooling Reactor and Management Method Based on Improving Fuel Utilization

Abstract

The invention discloses a liquid metal cooling reactor and a management method based on improving the fuel utilization rate. The reactor core is surrounded by a low-temperature strong moderator component, and a high-temperature strong moderator component is arranged on the sub-periphery. Rod assemblies and high power moderated assemblies. According to the inherent neutronic characteristics, power and burnup distribution characteristics of the liquid metal cooled fast reactor, the present invention constructs components with different functions and uses: low-power fuel components for reducing neutron leakage at the outermost periphery of the reactor core, and for reactors The high-power fuel assembly and control rod assembly inside the core form a unique liquid metal-cooled fast reactor core loading scheme, which significantly improves the average unloading fuel consumption and nuclear fuel conversion ratio of the liquid metal-cooled fast reactor, and enhances liquid metal cooling. Engineering feasibility of a fast reactor closed uranium-plutonium fuel cycle system.

Description

technical field [0001] The invention relates to the technical field of nuclear reactors, in particular to a liquid metal cooling reactor and a management method based on improving fuel utilization. Background technique [0002] Liquid metal-cooled reactors using a closed uranium-plutonium fuel cycle system have great development potential in nuclear waste transmutation and nuclear fuel proliferation, such as sodium-cooled fast reactor (SFR), lead (bismuth) cooled fast reactor (LFR), etc. It is of great significance to the sustainable development of nuclear fuel. In addition, the liquid metal cooling reactor also has high safety and economy, so it has become the main reactor type of the IV generation advanced nuclear energy system. Because liquid metal has no neutron moderation ability, the loading of highly enriched uranium plutonium oxide fuel or uranium dioxide fuel in the core is relatively high. In order to meet the safety requirements, liquid metal reactors usually us...

AI Technical Summary

Problems solved by technology

In order to meet the safety requirements, liquid metal reactors usually use strong neutron-absorbing stainless steel as the cladding material, which affects the fuel economy of the core.

At the same time, the neutron leakage of the liquid metal cooling fast reactor is large, which will also reduce the fuel utilization rate

The above reasons lead to a large gap between the proliferation capacity of the closed uranium-plutonium cycle nuclear fuel of metal fast reactors compared with the theoretical value. Therefore, it is very necessary to explore a liquid metal cooling fast reactor core design method with a higher nuclear fuel utilization rate, and to improve the nuclear fuel capacity. Breeding Capability, Enhanced Engineering Realization of Closed Uranium-Plutonium Nuclear Fuel Cycle Systems

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