Details and Image
|Date||Scale Length||Area of Use
|Disk||Radiac #1||Blundell Harling Ltd.||England||Plastic||1952-1956||Dia = 12.7 cm||Radiation Dosage
Notes: "It works as follows: if the exposure rate (roentgens/hr) is known at a given time after a nuclear explosion, the calculator predicts the exposure rate at any other time. It also estimates the dose to personnel who are in the area at specified periods of time after the explosion"