Steam/Hydrogen Venting: IF you have a Cooling Vent in your reactor, it will slowly vent the gases made by SUC use at one bucket's worth of water every minute. This means that you can then introduce one bucket of water or an equivalent into the reactor core every minute without causing an explosion.
Smoking Hazard: If you light a fire while a reactor is venting hydrogen gas, it will EXPLODE IN YOUR FACE. Solution: Ban Flint and Steel in your reactor complex. The radius for this event happening is 3 metres around the reactor. Take note that it will also explode if you do not take at least 30 seconds for the gas to diffuse into the air.