But the most interesting miscreant is the US Navy. The reduction of the NCRP/ICRP recommended limit from 1 mSv per day to 3 mSv/week, which was based on genetic fears which proved to be ginned up and unfounded, took place in 1951. This just happened to be the time when the US Navy was setting the limits for nuclear submariners. //

The Navy's definition of a ``high radiation area", which must be locked or guarded, is 1 mSv/h or higher. Stay times are enforced when entry into an area where the dose rate is 10 mSv/h or higher. A sailor can still get up to 39 mSv in a single exposure without requiring an inquiry. However, 100 mSv in a single exposure triggers an investigation by an independent Accident Review Board. Studies show no increase in cancer among American submariners. A 2001 study by NYU looked at a cohort of 85,498 enlisted submariners. This group had experienced 584 cancer deaths. NYU put the expected age-matched cancer deaths at 685.\cite[page 51]{nnpp-2016}