Containment structure for nuclear system

A nuclear containment structure, comprising:

• a plurality of sections, wherein the plurality of sections are stacked axially to comprise the nuclear containment structure:
• a plurality of cavities within the nuclear containment structure, wherein the plurality of cavities comprise a central chamber and a plurality of auxiliary chambers;
• a nuclear reactor vessel, wherein the nuclear reactor vessel is enclosed within the central chamber, the central chamber providing support for the nuclear reactor vessel, the nuclear containment structure shielding the nuclear reactor vessel from kinetic events external to the nuclear containment structure and shielding the external environment from kinetic events within the nuclear reactor vessel;
• a plurality of cooling channels enclosed within the plurality of auxiliary chambers, the auxiliary chambers providing support for the plurality of cooling channels.

A nuclear containment structure, comprising:

• a plurality of sections, wherein the plurality of sections are stacked axially to comprise a vessel, the vessel being configured to:
• mitigate, by using a physical barrier, the movement of radionuclides from inside a containment structure to a surrounding space;
• shield, by varying the alloy properties throughout the containment structure, an exterior of the containment structure from radiation produced inside of the containment structure;
• regulate, by transferring thermal energy, a temperature within the containment structure, wherein the containment structure transmits heat from an inside wall of the containment structure to an external wall of the containment structure;
• and
• regulate, by storing thermal energy, the temperature within the containment structure, wherein the containment structure absorbs heat produced inside of the containment structure, wherein the containment structure comprises one or more materials having different phase change temperatures, wherein one or more of the materials is configured to undergo a phase change to absorb heat.