Dear professor Anees,

The effective dose for the Uranium:

4.5 X 10-8 Sv/Bq for ingestion

and 8 x 10-6 Sv/Bq for inhalation

Best regards

WHO limit for uranium in drinking water is 30 ppb i.e. 30 micro gram per litre. This is on chemical toxicity of heavy metals like U. Rest you refer to reports/papers on uranium in drinking water which is one of the main source of Uranium. 

According to NRC: https://www.nrc.gov/waste/llw-disposal/llw-pa/uw-streams/bg-info-du.html

“In sufficient amounts, uranium that is ingested or inhaled can be harmful because of its chemical toxicity. Like mercury, cadmium, and other heavy-metal ions, excess uranyl ions depress renal function (i.e., affect the kidneys). High concentrations in the kidney can cause damage and, in extreme cases, renal failure. The general medical and scientific consensus is that in cases of high intake, uranium is likely to become a chemical toxicology problem before it is a radiological problem. Since uranium is mildly radioactive, once inside the body it also irradiates the organs, but the primary health effect is associated with its chemical action on body functions.

In many countries, current occupational exposure limits for soluble uranium compounds are related to a maximum concentration of 3 µg uranium per gram of kidney tissue. Any effects caused by exposure of the kidneys at these levels are considered to be minor and transient. Current practices, based on these limits, appear to protect workers in the uranium industry adequately. In order to ensure that this kidney concentration is not exceeded, legislation restricts long term (8 hour) workplace air concentrations of soluble uranium to 0.2 mg per cubic meter and short term (15 minute) to 0.6 mg per cubic meter.

Like any radioactive material, there is a risk of developing cancer from exposure to radiation emitted by natural and depleted uranium. The annual dose limit set by the IAEA for a member of the public is 1 mSv, while the corresponding limit for a radiation worker is 20 mSv. The additional risk of fatal cancer associated with a dose of 1 mSv is assumed to be about 1 in 20,000. This small increase in lifetime risk should be considered in light of the risk of 1 in 5 that everyone has of developing a fatal cancer. It must also be noted that cancer may not become apparent until many years after exposure to a radioactive material.”

Thank you Dr. Khalid Haneen for your comment. I am asking about the safety level of uranium concentration uptake. 

Yes professor Anees,

I mean doses lower than those reported will be ineffective

Best regards

Thanks a lot Dr. MUNISH KUMAR about your comment. that means the safety level of uranium concentration in drinking water is 30 ppb according to WHO. So I want to ask about the reference value of uranium excretion via urine.   

Thanks a lot Dr. Florian Glodeanu for your useful notes about the uranium level and its effect.