Pressure-tube type heavy-water moderated nuclear reactor

Details Pressure-tube type heavy-water moderated nuclear reactor Pressure-tube type heavy-water moderated nuclear reactor

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G21C 15/22 (2006.01) G21C 1/04 (2006.01) G21C 1/20 (2006.01) G21C 5/00 (2006.01)

Patent

CA 2025713

A pressure tube type nuclear reactor arranged in such a manner that pressure tubes each of which accommodates nuclear fuel and through each of which a coolant passes are accommodated in respective calandria tubes disposed in a calandria tank which contains heavy water, wherein the pressure tubes are arranged so as to form an equilateral triangular lattice configuration and/or a member, which replaces heavy water positioned around the calandria tube, is positioned around the calandria tube. Therefore, the volume ratio of nuclear fuel to heavy water can be made a proper value with which the coolant void reactivity coefficient becomes closer to negative values so that the self-control performance of the pressure tube type nuclear reactor is improved.

Réacteur nucléaire à tubes de force arrangé de manière que les tubes de force, dont chacun loge du combustible nucléaire et dans chacun desquels passe un caloporteur, sont placés respectivement dans des tubes de cuve disposés dans une calandre qui contient de l'eau lourde, les tubes de force étant disposés de manière à former un treillis de triangles équilatéraux et/ou un élément, qui remplace l'eau lourde placée autour du tube de cuve, est placé autour du tube de cuve. Par conséquent, la proportion volumique de combustible nucléaire par rapport à l'eau lourde peut devenir une valeur propre avec laquelle le coefficient de vide dans le caloporteur se rapproche de valeurs négatives, de sorte que la performance autonome du réacteur nucléaire à tubes de force s'en trouve améliorée.

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