Respuesta :
Because even though fission and fusion reactions both produce humongous amounts of energy, they're completely opposite in an important way.
A fission reaction, you might say, is teetering "on the edge". Once you get it going, then as long as there's some fuel lying around, the reaction keeps going on its own, and can run out of control. This is the reason why fission reactions are so desirable for commercial power generation. The reaction keeps itself going, and all WE have to do is keep it supplied with fuel, and keep it SLOWED DOWN so it doesn't run out of control.
A fusion reaction is exactly opposite. It needs extreme temperature and pressure to keep going. If either the temperature or the pressure falls off, the fusion reaction dies out. This is a big part of the reason why we're not at the point yet of being able to use fusion reactions for commercial power generation. We don't yet have dependable, reliable ways to CONTAIN a fusion reaction, maintaining the temperature and pressure it needs to keep going.
There are NO fusion reactors that run continuously. If there WAS one, and a spy damaged it, the worst thing he could do might be, let's say, to drill a hole in it or break a piece off of it. Either way, as soon as the temperature or the pressure in the vessel dropped off, the "fire would go out", and the "fusion reactor" would turn into a big tank of cold hydrogen and helium. If the spy stuck around and set fire to it, then Big Deal ! The hydrogen would burn in air and produce ... water ! The helium would do exactly nothing, because helium is totally non-reactive. It would just float out of the tank, through the hole, up and away into the sky. The reaction would just totally stop, and the whole event would be a big bunch of nothing.
Colin's idea for the story unlikely to be accurate because even though fission and fusion reactions both produce huge amounts of energy, they're completely opposite in a way they undergo reaction.
What is nuclear fission and fusion?
When the slow moving neutrons are bombarded with the heavy radioactive nuclei, the product is the more number of neutrons are produced with the large amount of energy. This multiplying process is called nuclear fission.
The same happens in nuclear fusion where large amount of energy is needed to make more heavy nuclei.
In a fission reaction, as long as there is fuel present, the reaction keeps going on its own, and eventually it can run out of control. This is the reason why fission reactions are desirable in commercial power station. The reaction is kept in control by using the control rods.
A fusion reaction is exactly opposite. It needs very high temperature and pressure. If either the temperature or the pressure falls off, the fusion reaction stops.
There are no fusion reactors that run continuously. If there was one, and a spy damaged it. Fusion reactor would turn into a big tank of cold hydrogen and helium. If the spy stuck around and set fire to it. The hydrogen would burn in air and produce water. The helium would do nothing, because helium is non-reactive.
Learn more about nuclear fusion and fission.
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