Reactor core loading method of pressurized water reactor nuclear power station reactor

Abstract

The present invention discloses reactor core loading method for pressurized water reactor in nuclear power station, and aims at solving the problems of neutron leakage and short circulation length. The technological scheme includes setting the assemblies to be replaced in the inside and burn-up assemblies to the outside, combining the burn-up assembly level, and arranging reactor cores in one quarter symmetry. The present invention has the advantages of prolonged service life, easy leveling of core power distribution, lower power peak factor, prolonged pressure casing, etc.

Description

technical field [0001] The invention relates to a nuclear reactor technology of a nuclear power plant, in particular to a reactor core loading method of a pressurized water reactor nuclear power plant. Background technique [0002] In the design of the reactor core loading scheme, the traditional nuclear power plant adopts the OUT-IN loading method, that is, the new components are arranged on the periphery of the core, and the other burn-up components are combined according to the burn-up depth and assembled in the inner circle of the core. And it is necessary to ensure 1 / 4 symmetry of the core. Place new components on the periphery of the core (e.g. figure 1 As shown), since the leakage is much larger in the periphery than in the inner circle of the core, the power distribution of the core is easy to flatten, and its power peak factor is correspondingly much lower. [0003] Thus, due to the large neutron leakage and the short cycle length, the fuel utilization economy is ...

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Problems solved by technology

[0003] Thus, the fuel utilization economy is not very good due to the large neutron leakage and the short cycle length

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