cued to the relevant section:

“Risk of exposure induced death must be kept below 3%, at a 95% confidence interval.”

I have been following the development of Ex-Rad or ON 01210.Na for many years now.
https://en.wikipedia.org/wiki/Ex-Rad

Its not a wonder drug to fight cancer or radiation damage but it does work very well against specific damage. Mainly hematologic cancers and gastric cancers.

Its main problem is its not a cure but a only a preventative. So the person must continually take the drug and it only lasts about a week in the body.

This is the kind of drug that could benefit from a moon based research lab. A years worth of study of pigs taking the drug on the surface of the moon in an unshielded dome. The humans could live in shielded domes.
I don’t think caring for pigs in a zero G environment like fLOP-G would work out well.

I never did like these studies where they administered huge doses of something over a short period of time to “simulate” exposure. They almost never directly relate to real life.

Under: Materials and Methods / Mouse Irradiation

Wild-type mice (C57BL/6J; male, 6 to 8 wk old; n = 10) were irradiated (dose: 0.5 Gy) using a simulated space radiation source at the NASA Space Radiation Laboratory (NSRL), Brookhaven National Laboratory for iron (56Fe; energy: 1,000 MeV per nucleon; LET: 148 keV/μm) irradiation, and a 137Cs source was used for γ-ray (LET: 0.8 keV/μm) whole-body irradiation of mice. Mice were euthanized either 7 d, 60 d, or 12 mo after radiation exposure.

So while not explicitly stated, it appears that the entire dose (0.5 Gy = 50 rad, for those still used to cgs units) likely was given in a single short exposure.

I think the reason they do it this way is that it’s cheaper to get access to a high rate source for a short period than to have continuous access to a lower rate source for a much longer period of time. I would think that rate would be as important as total dose in these tests, but I’ve not read any scholarly arguments on the subject.

The linked article says a very low dose [of iron ion radiation] was delivered over the equivalent of a months-long period in deep space but doesn’t give specifics. Is the paper publicly available?