I'm wondering about origins of this value that comrade Dyatlov said, "Not great, not terrible". The movie and some documentaries mention that they did not know or that they undervalued the danger of radiation due to relatively low value that dosimeter (intensimeter should be correct term) shows.
I'm wondering about exact numbers, because I have not seen intensimeter measuring 3.6 R/h as max value yet. It is also very strange value, as a max of any gauge on any other device, despite this explanation, is possible through the math: if engineers build geiger tube and circuit to max 1 miliroentgen per second, that should give 3.6 R/h.
I think it is director's number, affected with CDV-715 and CDV-717 devices designed for use by ordinary people in case of nuclear accident, very common in USA and western world during 1960-1980 period, because that device has gauge from 0-5 and red "circuit check" field started at number 3.6
In the Soviet Union, most common devices were DP5B (ДП5Б). This device is mentioned in some sources used during cleanup operations, but maximum reading of this device is 200 R/h.
Intensimeter IT-65 made in former Czechoslovakia has ability up to 500 R/h
Does anyone have any other information/theories why such value was used ?