Quantitative Fit Test (QNFT) for Respirator Law and Legal Definition

According to 10 CFR 20.1003 [Title 10 – Energy; Chapter I -- Nuclear Regulatory Commission; Part 20 -- Standards for Protection Against Radiation; Subpart A -- General Provisions], the term quantitative fit test (QNFT) for respirator means “an assessment of the adequacy of respirator fit by numerically measuring the amount of leakage into the respirator.”