Gas stoves without extraction are also a lot more likely to use a liquefied gas fuel (i.e. bottled butane/propane) rather than a plumbed in utility gas mains (typically methane) which makes a big difference in particulate emissions during combustion
Considering how dense radioactive materials typically are (i.e. not likely to disperse in the air as a powder under typical working conditions) you’re talking about some hyperbolic extraction fan there :)
Just get a V and a VII in there