G - Physics – 21 – C
Patent
G - Physics
21
C
G21C 3/28 (2006.01) G21C 3/328 (2006.01) G21C 7/27 (2006.01) G21C 1/10 (2006.01)
Patent
CA 2099324
ABSTRACT A method and apparatus is described for breeding fissile material in a pressure tube heavy water moderated reactor containing a plurality of fuel bundles, wherein the bundle has a plurality of elongated fuel rods or fuel elements containing fuel material which are mechanically supported therein. A first group of fuel rods containing fertile material is arranged in a first region of the fuel bundle. A second group of fuel rods containing fissile material is arranged in a second region of the fuel bundle such that it surrounds the first region of fertile material. This arrangement results in that the second region of fissile material being relatively impenetrable to thermal neutrons generated in the moderator while exposing the fissile material, initially during an early part of its life in the reactor, to an epithermally rich neutron spectrum to breed fissile material in the second region, while the fissile material is depleted in the first region. The bred fissile material in the second region, is placed in a thermally rich neutron spectrum, to convert the bred fissile material to energy, thereby increasing the amount of energy produced from a fuel bundle over the fuel life.
Atomic Energy Of Canada Limited - Energie Atomique Du Canada Limitee
Dastur Adi R.
Gowling Lafleur Henderson Llp
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