A nuclear fusion system comprises a nuclear fusion device for providing heat energy, a capacitor for storing electrical energy for use by the nuclear fusion device in providing the heat energy, and an electrical conductor for carrying electrical energy from the capacitor to the nuclear fusion device, each of the nuclear fusion device, the capacitor and the conductor being located within a first chamber. The first chamber is located within a second chamber. A fluid is located between the first and second chambers, surrounds the nuclear fusion device, the capacitor and the conductor, and receives heat energy from each of the nuclear fusion device, the capacitor and the conductor, resulting in the fluid being heated. A thermal energy converter receives heated fluid from the second chamber. A super insulating material encloses the second chamber to reduce heat loss from the heated fluid to the cooler ambient.