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Updated: Nov 18, 2025

Split Point Analysis and Uncertainty Quantification of Thermal-Optical Organic/Elemental Carbon Measurements
Published on: September 7, 2019
Derivation of uncertainty propagation for clearance measurement
Hirotaka Sakai1, Taiki Yoshii1, Satoru Kawasaki1
1Regulatory Standard and Research Department, Secretariat of Nuclear Regulation Authority (S/NRA/R), 1-9-9, Roppongi, Minato-ku, Tokyo 106-8450, Japan.
Abstract:
Clearance measurements are performed to calculate the sum of the ratios of the measured activity concentration to the limit for all nuclides to be considered. In the derivation of the uncertainty, the modeling of the measurement is essential. By using formula for the modeling, the uncertainty and upper limits of the coverage interval can be calculated by uncertainty propagation. The treatment of the ratio of the activity concentration of difficult-to-measure-nuclides to that of the key nuclide is also described.
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