Patent Number: 
Section: claims

1. A method for using a molten salt reactor, the method comprising:obtaining a molten salt reactor comprising:a reactor core comprising graphite and defining an internal space; anda graphite fuel wedge that defines multiple fuel channels, wherein the fuel wedge is received within the internal space, wherein an outer surface of the fuel wedge comprises a first contoured shape, wherein an internal surface of the internal space comprises a second contoured shape, wherein the first contoured shape of the fuel wedge substantially corresponds in shape to and contacts the second contoured shape of the internal surface of the reactor core as the reactor core operates, and wherein the fuel channels are configured to allow a fissionable fuel to flow from a first end of the fuel wedge to a second end of the fuel wedge, andflowing the fissionable fuel through the fuel channels. 2. The reactor of claim 1, varying a rate at which the fissionable fuel flows through the fuel channels to vary a temperature of the fissionable fuel. 3. The reactor of claim 1, wherein the fuel wedge comprises:a first section comprising a first portion of the fuel channels, anda second section comprising a second portion of the fuel channels,wherein the first section and the second section are disposed end to end within the internal space such that the first and second portions of the fuel channels are aligned, and are in fluid communication, with each other,wherein an alignment pin extends between the first section and the second section of the fuel wedge, andwherein a seal is disposed between the first section and the second section of the fuel wedge.