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Answer to Question #144 Submitted to "Ask the Experts"Category: Doses and Dose Calculations — Internal dose calculations The following question was answered by an expert in the appropriate field: Q
I understand that the average person receives approximately 360 rem of
radiation per year. If you drink 2 litres of water per day that has
approx 5 pCi of radium 226 and 228 per liter, for a period of 70 years,
you would have a 1 in 10,000 chance of develping some form of cancer.
My question to you is how much radium is 5 pCi per liter when compared
to 1 rem or how many pCi would equal a rem?
A
When a person drinks 2 L of water containing 5 pCi of 226Ra,
the internal dose received by the person will increase with time. This
is a chronic intake case, with daily ingestion intake of 10 pCi 226Ra. A calculation using the CINDY internal dosimetry program gives the following results:
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