According to Joseph Trevithick in “Lockheed Martin Now Has a Patent For Its Potentially World Changing Fusion Reactor”
If the system works, it’s hard to underscore just how dramatically it could change not just the future of warfare, but the basic nature of human existence. Running on approximately 25 pounds of fuel – a mixture of hydrogen isotopes deuterium and tritium – Lockheed Martin estimated the notional reactor would be able to run for an entire year without stopping. The device would be able to generate a constant 100 megawatts of power during that period.
According to the company website on the CFR, the reactor could be powerful enough to run an aircraft carrier, power a plane the size of a C-5 Galaxy airlifter, provide electricity to cities with anywhere from 50 to 100,000 people, and maybe even speed up a trip to Mars. In each case, the compact reactor would take the place of large conventional fuel systems or fission reactors, eliminating weight and bulk. This in turn could create trade space for additional system or carrying capacity in terms of personnel or materiel or potentially allow for a more energy efficient overall shape or design.
The U.S. government also reserves the right to classify patents it feels might be a threat to national security if they were public, so the fact that this one is not might also calls into question how mature the system might be in actuality.