U.S. Nuclear Regulatory Commission

Question 388: In regard to Question 91 (previously

answered in the third set of Q&As), can NIOSH approved

respiratory equipment which makes use of a combination

particulate filter and iodine sorbent with a protection

factor for particulates be used in a mixed particulate and

iodine atmosphere to limit intakes? This practice would

seem valid for equipment that is NIOSH approved and has a

protection factor for particulates.

Answer: Yes. However, there is no assigned protection

factor for radioiodine with this equipment. [The NRC may

authorize radioiodine protection factors for this equipment

in accordance with 10 CFR 20.1703 (b) (2) as it has

previously authorized them in accordance with 10 CFR 20.103

(d).] (References: 10 CFR 20.1702, 10 CFR 20.1703).