United States Nuclear Regulatory Commission - Protecting People and the Environment

U.S. Nuclear Regulatory Commission

Question 114: A licensee is required to provide individual

monitoring for each occupationally exposed individual who

is likely to receive, in a year, a dose in excess of 10% of

the applicable limits in 10 CFR 20.1201, 10 CFR 20.1207, or

10 CFR 20.1208. Must a licensee account for the exposure

that an individual may receive at another licensee's

facility, if that worker transfers to another licensed

facility during the monitoring year, when determining if it

is likely that the individual may exceed 10% of the limits?

In addition, if a new employee already has an exposure in

excess of 10% of the limits when they start work at the new

employer, must the new employer automatically monitor the


Answer: No. The licensee is only responsible for

evaluating the potential for exposure at its facility. If

the licensee makes an evaluation that the dose will not

exceed the 10% threshold, the licensee need not record or

monitor the dose. If the licensee opts to measure the

dose, although its preliminary evaluation shows that it is

not necessary and finds that the threshold has been

exceeded, it must reevaluate its program and provide

monitoring as required. In addition the licensee will need

to reconsider the requirements to sum internal and external

doses. (Reference: 10 CFR 20.1502)

Page Last Reviewed/Updated Thursday, March 29, 2012