Authors:K. Mathew, S. Bürger, S. Vogt, P. Mason, M. Morales-Arteaga, and U. Narayanan
The International Organization for Standardization (ISO) Guide to the expression of Uncertainty in Measurement (GUM) was developed
to meet the demand for a standardized way of evaluating and expressing uncertainties. The Davies and Gray (D&G) titrimetry
method is routinely used in nuclear safeguards for uranium accountability measurement and a statement of the uncertainty that
can reasonably be attributed to the measured assay value is therefore of importance. A mathematical model for an uncertainty
evaluation of D&G measurements in compliance with ISO GUM is presented. This is illustrated by a numerical example and the
utilization of the uncertainty budget is explored.
Authors:Werner Hässelbarth, Jürgen Rauch, and Stefan M. Sarge
al. [ 4 ] presents the concept and design of the calorimeter, the main measurements and the data evaluation. In all developments—calorimeter, measuring system, data acquisition and evaluation—the consideration of uncertainty sources has been an
uncertainty related to the economic operations. They also complicate the ability to sustain a trusting environment that is widely adopted as one of the most important factors of economic stability, while they cause lags in economic recovery by increasing the
Stochastic spatial simulation is a widely used method to quantify and display spatial uncertainty. Multiple, alternative, and equiprobable realizations are used to represent the spatial uncertainty of the given
Authors:P. Robouch, G. Arana, M. Eguskiza, S. Pommé, and N. Etxebarria
The concepts of the Guide to the expression of Uncertainties in Measurements for chemical measurements (GUM) and the recommendations of the Eurachem document "Quantifying Uncertainty in Analytical Methods" are applied to set up the uncertainty budget for k0-NAA. The "universally applicable spreadsheet technique", described by Kragten, is applied to the k0-NAA basic equations for the computation of uncertainties. The variance components — individual standard uncertainties — highlight the contribution and the importance of the different parameters to be taken into account.
Authors:F. Bronson, V. Atrashkevich, G. Geurkov, and B. Young
To properly interpret the quality of a gamma-spectroscopy measurement, an uncertainty estimate must be made. The uncertainty
in the efficiency calibration is the dominant component to the total propagated measurement uncertainty for many types of
measurements. Any deviations between the as-calibrated geometry and the as-measured geometry contribute to the total uncertainty.
A mathematical technique has been developed to evaluate the variations between calibration and measurement conditions. A sensitivity
analysis mode identifies those variables with the largest contribution to the uncertainty. The uncertainty mode uses probabilistic
techniques for the combined variables to compute average efficiency and uncertainty, and then to propagate those values with
the gamma-spectroscopic analysis into the final result for that sample.