Radiation visual effects visible after reactor repair

[tinyhoot]

It seems that, on the highest setting, the visual effects of radiation continue even after the reactor has been repaired. It's spotty and does not happen everywhere; supposedly the locker room works as intended but areas near it do not.

[Mar-Veloz]

I also experienced this on the "Reminder" radiation setting, so I don't think the bug is unique to the "Chernobyl" setting. I was able to fix the bug for myself locally with a one-line change, which I'll submit it as a PR.