sieverts

Albert Stevens survived 64 sieverts deliverted over 20 years (lethal dose 50 % die in 30 days is 4-5 sieverts).

Rem, and Sieverts (Sv), are both dosage measurements, which means they vary based on where they interact with the body.

Two days of strong winds and storms and you've just dumped sieverts on most of the central US and Canada.

The dose equivalent is expressed numerically in rems or sieverts (Sv) (see 10 CFR 20.1003).

However, rads don't distinguish between different types of radiation like sieverts do.

That's measured in rems or sieverts (or Grays, notice the spelling).

Following that math, the 9 day Apollo trip got 0.0114 sieverts.

Hard to say, since that's in grays instead of sieverts.

This is why grays/rads are different units from sieverts/rems.

The gigacounter predicts the sieverts/h based on the local amount of radiation and by assuming that is the dosage all parts of your body are exposed to.

That's sort of the point of sieverts, though.

Beta vs alpha vs gamma radiation have very different biological effects and sieverts, the measuring units that take some of these differences into account, are a gross over simplification.

Different radiation sources aren't casually comparable as "banana multiples" or by counting (or linearly multiplying) sieverts.

Looking up some numbers, "rock" has a conductivity on the order of 10^-5 sieverts per meter.

PS Sieverts are a physical measure, Greys are a measure of biological "harm".

The author states: "the risk of dying from the screening exam was 1/660" And demonstrates with: "This involves a radiation dose of about 30 milli-Sieverts.

A conservative estimate is that one launch on this thing would expose the crew to 5000 Sieverts, or 100 Chernobyls worth.

The first couple of robots they sent in saw up to 650 Sieverts/hr [1] (about 650 Grays/hr, or 650 Joules/kg/hr) [2].

The surface of the moon gets about 60 micro-Sieverts of radiation per hour[2]...