What type of reactor system does not have radioactive steam and condensate?

The type of reactor system that does not have radioactive steam and condensate is the Pressurized Water Reactor (PWR). In a PWR, water is used as both the coolant and the moderator, and it remains under high pressure to prevent it from boiling. The primary coolant circulates through the reactor core to absorb heat from nuclear fission, and then it transfers this heat to a secondary loop where steam is generated.

Since the steam in a PWR is produced from water that has not come into contact with the nuclear fuel or the radioactive coolant, it remains non-radioactive. This allows for the safe production of steam that can be used for power generation without the concern of radioactivity affecting the steam or the condensate. This design helps enhance operational safety and simplifies waste management.

In contrast, other reactor types, like boiling water reactors, involve direct contact between the reactor coolant and the steam produced, leading to radioactivity in the steam and condensate. Therefore, the Pressurized Water Reactor's configuration ensures the separation of the radioactive environment within the reactor core from the secondary loop, allowing for a non-radioactive output, which is a critical safety feature.