linear industrial rad

["Randy Ross" <RNROSS@BCSC02.GOV.BC.CA>]

To: RADSAFE --INTERNET RADSAFE@ROMULUS.EH


Sandy, I see what you mean. Thanks for the clarification. Regarding doses to
industrial radiographers in Canada: In 1993,
 862 workers got 0.0 - 0.19 mSv
232 workers got 0.2 - 0.49 mSv
597 workers got 0.5 - 4.99 mSv
432 workers got 5.0 - 29.9 mSv
25 workers got 30.0 - 49.9 mSv
4 workers got > or = 50.0 mSv

This information is from the National Dose Registry. Therefore includes all
workers who wear a TLD or actually all who possess a TLD whether they wear it
is another issue.  I think few don't wear their TLD unless maybe they are
getting close to 50 mSv in one year and don't want to be ordered to stop
working. This is clearly the most exposed group of all users of radiation
(average yearly).  They also get almost half of ALL the overexposures for a
single wearing period for ALL radiation workers.  There were 2,153 workers,
 1.3 % got more than 3 rem and 0.18% more than 5.
 This little group gets typically almost half of the overexposures in the whole
radiation users community approximately 130,000 workers!!!
 How many industrial radiographers are there in the US?
 Does the US have a national dose registry?
 Are these figures similar to doses received by US industrial radiographers?

Radiation Protection, Ministry of Health, British Columbia
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