Modular prismatic high-temperature gas cooled reactor power distribution optimization method

Abstract

The invention discloses a modular prismatic high-temperature gas cooled reactor power distribution optimization method. The method comprises the following steps: determining an average enrichment degree, an enrichment degree ratio factor of fuel assemblies in each radial region and an enrichment degree ratio factor of fuel assemblies in each axial layer; determining the enrichment degree of each fuel assembly according to the average enrichment degree, the enrichment degree ratio factor of the fuel assemblies in each radial area and the enrichment degree ratio factor of the fuel assemblies in each axial layer; and outputting an optimization result according to the enrichment degree of each fuel assembly. The invention has the beneficial effects that the enrichment degrees of the fuel assemblies at different positions are optimized according to the zoning and layering arrangement, so that the reactor core power distribution can be effectively optimized, the highest temperature of the reactor core fuel is as low as possible, the temperature rise allowance of the reactor core is improved, and the inherent safety of the reactor core is ensured.

Description

technical field [0001] The invention belongs to the technical field of nuclear reactor engineering, and in particular relates to a modular prism type high-temperature air-cooling power distribution optimization method. Background technique [0002] The rapid development of the economy has increased the demand for energy, but traditional coal and other fossil fuels will bring serious environmental problems, which prompts my country to continue to explore and develop clean energy. Among various types of new energy, nuclear energy has the advantages of cleanness, high energy density, almost no greenhouse gas emissions, and low fuel transportation pressure. [0003] The modular prismatic high-temperature gas-cooled reactor is an advanced reactor type belonging to the fourth-generation nuclear energy system, and has superior inherent safety. The ceramic fuel particles used in this type of reactor can effectively prevent the release of fission products; the graphite core has a la...

AI Technical Summary

Problems solved by technology

When the fuel temperature is too high, the core temperature rise margin will be reduced, and the temperature negative feedback will not be able to introduce enough negative reactivity, which may make the core unable to shut down only relying on the temperature negative feedback, and the inherent safety of the core Under accident conditions, the fuel temperature may also exceed the temperature limit, resulting in a greatly increased breakage rate of ceramic fuel particles and the release of radioactive substances such as fission products.

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