U.S. Nuclear Regulatory Commission

U.S. Nuclear Regulatory Commission

Question 21: Is it time to update Regulatory Guide 1.109

and its corresponding codes due to the updated dose

conversion factors in the revised Part 20?

Answer: Perhaps, but such an update could only be a

partial update at this time. The full updating could only

occur if and when Appendix I is recast as an effective dose

equivalent. The evaluation of whether Appendix I should be

changed is currently underway. (Reference: Regulatory

Guides)