3 ms·
Worth noting that this is not really unique to this reactor, and the technology has been around for a while (including multiple basically fully functional demon
by gh02t 4y ago
Worth noting that this is not really unique to this reactor, and the technology has been around for a while (including multiple basically fully functional demonstration reactors that were actually built, though they weren't without their technical issues). NuScale's design for example, which is a very different design and also much closer to commercial rollout, has a similar greatly reduced need for a large exclusion zone (https://www.nei.org/news/2018/nrc-staff-agrees-smrs-wont-need-large-epzs https://www.nei.org/news/2018/nrc-staff-agrees-smrs-wont-nee...).
This article is reporting on what amounts to a paper reactor design, which is really only like 0.1% of the effort required to actually build. There are plenty of good design concepts for new and fancy reactors, but the business, regulatory, and PR side is where the challenges really lie. But this general technology is a big deal in the nuclear industry right now and it seems increasingly likely that they might finally build some fully functional plants. Strictly speaking they are actively building some MSR plants, but given the not great track record of actually completing new nuclear plants I will remain pessimistic until they are ready to go critical.
- hairytrog 4y agoNot sure it's a justified reduction in exclusion zone. Yes they use natural circulation to get rid of decay heat if they lose power to run the pumps. BUT - they can't tolerate multiple reactors failing at once, they can't tolerate more than a few control rod withdrawals, and they can't tolerate clogging of the flow channels - Which to me, seem like reasonable accidents. The reduction in exclusion zone for NuScale is not really justified. If they get a reduction, you can expect the big ass reactors to also get a reduction...
- gh02t 4y agoI don't really have an opinion on the matter and I think it's a fair question to consider, but I'll note that the NRC obviously disagrees. At least for now, they could always change their mind. I seriously doubt that they would ever significantly reduce the exclusion zone requirement for any of the currently operating reactors, however.
- hairytrog 4y agoI think that's fair. I bet new large power plants will get the NuScale treatment and reduced exclusion zone though.