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Molten fuel nuclear reactor with neutron reflecting coolant

專(zhuān)利號(hào)
US10867710B2
公開(kāi)日期
2020-12-15
申請(qǐng)人
TerraPower, LLC（US WA Bellevue）
發(fā)明人
Anselmo T. Cisneros, Jr.; Charles Gregory Freeman; Kevin Kramer; Jeffery F. Latkowski
IPC分類(lèi)
G21C7/28; G21C3/54; G21C1/02; G21C7/22; G21C1/22; G21C15/28; G21C1/32; G21C7/27; G21C11/06; G21C15/02
技術(shù)領(lǐng)域
neutron,reflector,reactor,fuel,neutrons,in,core,flowing,material,molten
地域： WA WA Bellevue

摘要

Configurations of molten fuel salt reactors are described that utilize neutron-reflecting coolants or a combination of primary salt coolants and secondary neutron-reflecting coolants. Further configurations are described that circulate liquid neutron-reflecting material around a reactor core to control the neutronics of the reactor. Furthermore, configurations which use the circulating neutron-reflecting material to actively cool the containment vessel are also described. A further configuration is described that utilizes a core barrel between a reactor core volume of molten fuel salt and a reflector volume, in which the reflector volume contains a plurality of individual reflector elements separated by an interstitial space filled with molten fuel salt.

說(shuō)明書(shū)

The dynamic neutron reflector assembly 500 is in thermal communication with heat exchanger 510 disposed on the opposite side from fuel region 504. The heat exchanger 510 may contain one or more types of liquid coolant circulating therethrough. As neutron reflector 500 exchanges heat with the heat exchanger 510, the heat exchanger 510 may transport the heat away from the dynamic neutron reflector assembly 500 as part of a secondary coolant circuit. The secondary coolant circuit may supply heat to electricity generation equipment, such as, for example, a steam-driven turbine. In an implementation, molten fuel salt may flow upward through the nuclear fuel region 504 and downward through the heat exchanger 510, thus exchanging heat as part of a primary coolant circuit. In other words, the heat exchangers may exchange heat with both the molten fuel salt and exchange heat with the flowing neutron reflector in the channels 502. The flow rate of neutron reflector material may be adjusted to vary contact time with the heat exchangers to vary the temperature of reflector material flowing in the channels 502. As the temperature of reflector material varies, its density changes accordingly. Changes in the density of the reflector material alter its neutron reflective characteristics as denser materials have a higher mass per unit volume and are therefore more likely to reflect neutrons. The channels 502 may be formed in geometric shapes including without limitation square, rectangular, round, circular, polygonal, etc.

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