U.S. Nuclear Regulatory Commission
Question 217: How will licensees handle cases where occupationally exposed workers inform the licensee that they are concurrently being exposed (and/or monitored) at another facility, but refuse to name the other facility? (Note that if the worker is under contract, the other facilities may be competitors of the licensee).
Answer: Without knowing the occupational dose received by the worker at the other facility, the licensee cannot demonstrate compliance with the occupational dose limits for the worker if it permits the worker to receive concurrently an occupational dose. The licensee cannot allow the worker to receive any occupational exposure after the licensee becomes aware the worker is also receiving an occupational exposure at another facility which the worker refuses to name. See 56 FR 23383, third column, and Question 41 for additional information concerning concurrent employment.
(Reference: 10 CFR 20.1201, 10 CFR 20.2106)