Core loading method of pressurized water reactor nuclear power plant first cycle

Abstract

The invention discloses a core loading method of pressurized water reactor nuclear power plant first cycle. A first cycle core adopts a fuel assembly with 4-6 different enrichment degrees, a high leakage loading mode is adopted, and core reactivity inhibition and power distribution control are carried out by simultaneously adopting borosilicate glass solid inflammable poison rods and integrated gadolinium-supported fuel rods. The method greatly prolongs the cycle length of the first cycle core, adopts two solid inflammable poisons to avoid the contradiction of occupation of control rod guiding tubes due to use of too much borosilicate glass and avoid negative influences of unfavorable axial power distribution caused by use of too many integrated gadolinium solid inflammable poisons on running control, makes the core design be flexible, makes the power distribution flattening of the core be easy, has good engineering practicality and design flexibility, and can well realize the economy and safety of the power plant.

Description

technical field [0001] The present invention relates to the field of pressurized water reactor nuclear power plant reactor technology, in particular, it relates to the determination of fuel enrichment, the selection of combustible poisons and the core loading of the first cycle of the pressurized water reactor nuclear power plant arranged in the core method. Background technique [0002] The first cycle core of a PWR nuclear power plant is entirely composed of new fuel. How to effectively take into account the reactivity control and power distribution control of the core through the layout of the fuel and the use of poisons is an important technical issue, which is directly related to the economy of the core operation. and security. [0003] As far as the current first-cycle core design technology is concerned, the first-cycle core usually adopts three different fuel enrichment degrees, and the solid burnable poison uses a single form, such as: using borosilicate glass pois...

AI Technical Summary

Problems solved by technology

[0005] To sum up, when a solid combustible poison is used alone in the design of the first cycle core, if the length of the core cycle and the corresponding replacement cycle are to be extended, the control of the core reactivity and the power of the core cannot be well considered. effective control of distribution

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