I found this paper: https://www.sciencedirect.com/science/article/abs/pii/S0168900224001530 https://www.sciencedirect.com/science/article/abs/pii/S01689... Ess

I found this paper: https://www.sciencedirect.com/science/article/abs/pii/S0168900224001530 https://www.sciencedirect.com/science/article/abs/pii/S01689... Essentially, they use optical fiber as radiation sensors on Fukushima. So, while the concern about cloudiness is valid, the reality is that at least some types of optical fibers work okay even there.