I'm not familiar enough with Gate's investments nor his foundation's investments to say, and "traveling wave reactor" is something I've read once or twice before but not looked much into.
CANDU reactors have an excellent safety record and fail in a much safer way than light water reactors. I've been looking more into those recently. MSRs, and especially molten thorium salt reactors, I've read about and watch documentaries about quite a bit. Still, I'm just an interested layperson in this discussion. I used to date someone who was planning to be a nuclear engineer, but she ultimately ended up in software, too.
CANDU reactors have an excellent safety record and fail in a much safer way than light water reactors. I've been looking more into those recently. MSRs, and especially molten thorium salt reactors, I've read about and watch documentaries about quite a bit. Still, I'm just an interested layperson in this discussion. I used to date someone who was planning to be a nuclear engineer, but she ultimately ended up in software, too.