Working level month (WLM) definition
Working level month (WLM) means an exposure to one working level for 170 hours and calculated as 2,000 working hours per year divided by 12 months per year and is approximately equal to 170 hours per month.
Working level month (WLM) means a unit of exposure used to express the accumulated human exposure to radon decay products. It is calculated by multiplying the average radon progeny concentration in working levels to which a person has been exposed by the number of hours exposed and dividing the product by one hundred seventy hours per month.
Working level month (WLM) means a cumulative exposure to radon decay products calculated by multiplying the radon daughter concentration in units of working levels by the number of hours exposed and dividing by 170.
More Definitions of Working level month (WLM)
Working level month (WLM) means an exposure to 1 working level for 170 hours - - 2,000
Working level month (WLM) means a unit of exposure used to express the accumulated human exposure to radon decay products. It is calculated by multiplying the average radon progeny concentration in working levels to
Working level month (WLM) means an ex- posure to one working level for 170 hours.