Fuel loading method and reactor core

Details Fuel loading method and reactor core Fuel loading method and reactor core

1992-07-24

1994-04-26

Wasil, Daniel D.

Induced nuclear reactions: processes, systems, and elements

Handling of fission reactor component structure within...

Fuel component

G21C 1920, G21C 512

Patent

active

053073878

ABSTRACT:
In a fuel loading method for a reactor core made up by high burn-up fuel, fuel assemblies loaded in a circumferential zone of the core are shuffled between two layers of the circumferential zone until residing in the core for two cycles and, after residing for two cycles, are moved to the fourth layer of the circumferential zone from an outermost layer of the core, thereby reducing the difference in exposure due to a different radial power level in the vicinity of the core boundary. Those fuel assemblies are moved to control cells in a central zone of the core after residing in the circumferential zone for three cycles, and also such fuel assemblies as having resided in the central zone for three cycles are moved to the core outermost layer, thereby reducing the difference in exposure between the fuel assemblies having resided in the central zone and the fuel assemblies having resided in the circumferential zone due to different power levels in the central and circumferential zones. As a result, the difference in exposure between used fuel assemblies is reduced.

REFERENCES:
patent: 4285769 (1981-08-01), Specker et al.
patent: 4378329 (1983-03-01), Uchikawa et al.
patent: 4460538 (1984-07-01), Yamashita
patent: 4574069 (1986-03-01), Ross et al.
patent: 5093070 (1992-03-01), Koyama et al.

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