
Passive nuclear safety is a design approach for safety features, implemented in a , that does not require any active intervention on the part of the operator or electrical/electronic feedback in order to bring the reactor to a safe shutdown state, in the event of a particular type of emergency (usually overheating resulting from a or loss of coolant flow). Such design features tend to rely on the engineering of components such that their predicted behavio.

Nuclear power in space is the use of in , typically either small systems or for electricity or heat. Another use is for scientific observation, as in a . The most common type is a , which has been used on many space probes and on crewed lunar missions. Small fission reactors for Earth observation satellites, such as the , have also been flown. A

Renewable energy is one of the most effective tools we have in the fight against climate change, and there is every reason to believe it will succeed. A recent New York Times column seems to imply that renewable energy investments. . In addition to the climate benefits that they will help deliver, renewables already provide a wide range of market and public health benefits that far. . Much is said about the need to adapt the electric grid to the variability associated with integrating renewable energy into our electricity mix. Until recently, the huge costs of maintaining back-up generation and transmission in case they’re needed to keep the lights on when.