Radiation Monitoring

[Pete Grey]

Not knowing much about the levels of radiation deemed to be “normal” or safe I thought I should find out.

The International Commission on Radiological Protection ( ICRP) recommend 20 millisieverts per year as an occupational effective dose (this is the accumulative dose) a limit 50 millisieverts is allowed providing the average over 5 years does not exceed 20 millisieverts per year. A whole CT body scan is 15-20 millisieverts.

1000 microsieverts is 1 millisievert, and 0.2 microsievert/hour is less than 2 millisieverts a year.

Incidentally anyone flying at 40,000 feet will receive a dose of between 3 and 9 microsieverts/hour due to cosmic radiation.

This puts things in perspective.

Any way SS and Joe thanks for the information.