A 100,000-kilowatt reactor core fuel management method

Abstract

The invention discloses a 100,000-kilowatt reactor core fuel management method. The core contains 57 fuel assemblies, and the height of the active section is 215 cm, which is regulated by pure rod control. Fuel management of about 1 / 3 of the core refueling has been achieved by mixing enrichment charges, radial and axial partitioning of the core, using different quantities and mass percentages of combustible poisons, and adopting optimized control rod grouping and lifting sequence , the core refueling cycle is about 24 months; the batch unloading fuel consumption is about 43000MWd / tU, and the maximum component unloading fuel consumption is no more than 52000MWd / tU; the scheme meets the stuck rod criterion, and the core power distribution meets the relevant safety analysis requirements. The invention changes the batch loading and unloading strategy commonly used in small piles, realizes the multi-batch loading and unloading fuel management strategy in the long-life, pure rod control small piles, improves the fuel utilization rate, and strengthens the competition of multi-purpose small piles force.

Description

technical field [0001] The invention relates to the technical field of nuclear design, in particular to a 100,000-kilowatt reactor core fuel management method. Background technique [0002] Domestic research on reactor fuel management is aimed at large-scale commercial PWRs, and the longest refueling cycle is about 18 months. There are few public reports on the core fuel management of modular reactors in foreign countries, and the mainstream of small modular reactors adopts a one-time pass fuel management scheme without dumping. [0003] Large-scale commercial pressurized water reactors have no outstanding requirements for system simplification. Soluble boron is mainly used for burnup compensation and reactivity regulation. The burnup shadow effect is small, and the difficulty of fuel management is relatively low. In order to simplify the system design, modular small reactors To enhance the flexibility of the core operation to adapt to multiple purposes and to emphasize the...

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Problems solved by technology

[0003] Large-scale commercial pressurized water reactors have no outstanding requirements for system simplification. Soluble boron is mainly used for burnup compensation and reactivity regulation. The burnup shadow effect is small, and the difficulty of fuel management is relatively low. In order to simplify the system design, modular small reactors Enhance the flexibility of core operation to adapt to multiple purposes and emphasize modularity. Most of them adopt a full-stack loading and unloading strategy. Due to the uneven fuel consumption in the reactor, the fuel economy is bound to be greatly reduced.

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