Induced nuclear reactions: processes – systems – and elements – Handling of fission reactor component structure within... – Fuel component
Patent
1989-12-08
1992-03-03
Bentley, Stephen C.
Induced nuclear reactions: processes, systems, and elements
Handling of fission reactor component structure within...
Fuel component
376349, 376419, 376428, 376435, G21C 1902
Patent
active
050930702
ABSTRACT:
A core of boiling water reactor is divided into a central region and a peripheral region surrounding it in the radial direction thereof. The loading fraction of new first fuel assemblies containing burnable poison and loaded in the central region is greater than the loading fraction of the new first fuel assemblies loaded in the peripheral region. The loading fraction of second fuel assemblies loaded in the central region of the core and operating in a second operation cycle is smaller than the loading fraction of the second fuel assemblies loaded in the peripheral region of the core and operating in the second operation cycle. The second fuel assemblies contain no burnable poison. In such a core, the reactivity of the peripheral region is greater than that of the central region in the beginning of an operation cycle. Contrary, the reactivity of the central region is greater than that of the peripheral region in the end of an operation cycle.
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Chen et al., "Optimal Power Profile Fuel Management", Annals Of Nuclear Energy, vol. 4, 1977, pp. 407-415.
Aoyama Motoo
Koyama Junichi
Maruyama Hiromi
Nakajima Akinobu
Bentley Stephen C.
Hitachi , Ltd.
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