Bringing a nuclear reactor to Mars faces many challenges but it is possible. Nasa is right now working on a project called The Kilo Power
Kilopower. Kilopower is an experimental project aimed at producing new nuclear reactors for space travel. The project started in October 2015, led by NASA.
The DoE’s National Nuclear Security Administration (NNSA). … NASA has also studied the Kilopower reactor as the power supply for crewed Mars missions.
Kilopower is been designed to be safe and sustainable for future missions. This is not new, scientists have been working on putting a nuclear reactor in space for a very long time.
Kilopower is capable of producing up to 10 Kilowatts of electrical power. To put that into perspective that is enough electrical power to power 10 average households for approximately 10 years. That means NASA would have enough power to conduct various experiments and filter water for example.