From looking at the wiki on neutron moderators[0], it seems like light water is used in more reactors globally, so would that be cheaper to use? And maybe for deployment you'd have quadcopters drop biodegradable ballons filled with it.
Would be really interesting to read a feasibility study around this.
Maybe it can help by being a jobs program to stimulate the global economy through secondary effects and have another place capital can seek returns on besides sexting apps ;)
Sorry for being overly sarcastic, but you could just as well pay people to ride bikes around town and hope that stimulates industry. Still there would be no effect on nature around Chernobyl power plant.
Yup, grey413 pointed that out but thanks for reiterating. I was only looking at the cost when I made my comment since graphite stood out to me as being overly expensive.
Would be really interesting to read a feasibility study around this.
[0]: https://en.m.wikipedia.org/wiki/Neutron_moderator