Reflectors for molten chloride fast reactors

Patent metadata

Field	Value
Publication number	US-11075015-B2
Application number	US-201916299783-A
Country	US
Kind code	B2
Filing date	Mar 12, 2019
Priority date	Mar 12, 2018
Publication date	Jul 27, 2021
Grant date	Jul 27, 2021

Abstract

A reflector assembly for a molten chloride fast reactor (MCFR) includes a support structure with a substantially cylindrical base plate, a substantially cylindrical top plate, and a plurality of circumferentially spaced ribs extending between the base plate and the top plate. The support structure is configured to encapsulate a reactor core for containing nuclear fuel. The MCFR also includes a plurality of tube members disposed within the support structure and extending axially between the top plate and the bottom plate. The plurality of tube members are configured to hold at least one reflector material to reflect fission born neutrons back to a center of the reactor core.

First claim

What is claimed is:

1. A reflector assembly for a molten chloride fast reactor (MCFR) comprising:
at least one reflector structure, wherein the at least one reflector structure is circumferentially arrangeable in a substantially cylindrical shape having a longitudinal axis that encapsulates a reactor core for containing nuclear fuel; and
one or more tank sections disposed within the at least one reflector structure, wherein the one or more tank sections are configured to hold at least one reflector material to reflect fission born neutrons back to a center of the reactor core; and
a support structure that holds the at least one reflector structure in the substantially cylindrical shape, wherein the support structure includes a top plate and a bottom plate, the at least one reflector structure disposed between the top plate and the bottom plate, wherein the support structure also includes a plurality of circumferentially spaced ribs that at least partially extend from the top plate along the longitudinal axis, and wherein the plurality of circumferentially spaced ribs also extend between an outer circumferential edge of the top plate and an inner circumferential edge of the top plate.

2. The reflector assembly of claim 1 , wherein the at least one reflector structure forms a single tank section of the one or more tank sections.

3. The reflector assembly of claim 1 , wherein the at least one reflector structure is monolithically formed with the one or more tank section defined therein.

4. The reflector assembly of claim 1 , wherein the at least one reflector structure comprises two or more tank sections of the one or more tank sections, each of the two of more tank sections axially aligned along the longitudinal axis.

5. The reflector assembly of claim 4 , wherein the at least one reflector structure comprises a plurality of reflector structures and each of the two or more tank sections are formed by individual and separable reflector structures of the plurality of reflector structures.

6. The reflector assembly of claim 1 , wherein the one or more tank sections are formed by a grid pattern of a plurality of radial members and a plurality of circumferential members, each disposed within the at least one reflector structure.

7. The reflector assembly of claim 6 , wherein the at least one reflector structure comprises two circumferential ends, and wherein the two circumferential ends comprise curved surfaces.

8. A reflector assembly for a molten fuel nuclear reactor comprising:
a plurality of modular reflector structures disposed adjacent to one another and positioned circumferentially around a longitudinal axis to at least partially encapsulate a reactor core in a substantially cylindrical shape;
at least one tank section disposed within each of the plurality of modular reflector structures;
reflector material held within the at least one tank section configured to reflect fission born neutrons back to a center of the reactor core; and
a support structure configured to hold the plurality of modular reflector structures in place within the molten fuel nuclear reactor, wherein the support structure includes a substantially cylindrical top plate and a substantially cylindrical bottom plate, the plurality of modular reflector structures disposed between the top plate and the bottom plate, wherein the support structure further includes a plurality of ribs extending from the substantially cylindrical top plate along the longitudinal axis, and wherein the plurality of circumferentially spaced ribs also extend in a radial direction from an outer circumferential surface of the plurality of modular reflector structures towards an inner circumferential surface of the plurality of modular reflector structures.

9. The reflector assembly of claim 8 , wherein the reflector material comprises liquid lead.

10. The reflector assembly of claim 8 , wherein the support structure further comprises one or more restraint hoops positioned around an outer perimeter of the plurality of modular reflector structures.

11. The reflector assembly of claim 8 , wherein two ribs of the plurality of ribs at least partially form an exit flow channel from the reactor core.

12. The reflector assembly of claim 8 , wherein the support structure further comprises a plurality of ribs extending between the substantially cylindrical top plate and the substantially cylindrical bottom plate.

13. The reflector assembly of claim 8 , further comprising a flow guide disposed below the plurality of modular reflector structures, wherein the flow guide comprises a lower reflector.

Assignees

• Terrapower Llc

Inventors

• Cisneros Jr Anselmo T
• Freeman Charles Gregory
• Kramer Kevin
• Latkowski Jeffery F

Classifications

• G21C15/10

  from reflector or thermal shield · CPC title

• G21C7/28

  by displacement of the reflector or parts thereof · CPC title

• G21C3/54

  Fused salt, oxide or hydroxide compositions · CPC title

• G21C3/22

  with fissile or breeder material in contact with coolant · CPC title

• G21C1/022

  characterised by the design or properties of the core · CPC title