The Pechora–Kama Canal test used three "clean" nukes and today the dose measures between 9 and 70 μSv [micro-Sieverts] per week.

This is about the same as the local natural background dose.

https://www.sciencedirect.com/science/article/abs/pii/S02659...

You can estimate your personal yearly dose with this calculator, though for me it only works in firefox.

https://www.epa.gov/radiation/calculate-your-radiation-dose

From the wikipedia article on the tiaga bombs.

> "the current external γ-ray dose rate to a human from the contaminations associated with the 'Taiga' experiment was between 9 and 70 μSv [micro-Sieverts] per week". The report also recommends periodic monitoring of the site was recommended. In comparison, typical exposure from naturally occurring background radiation is about 3mSv per year, or 57μSv per week