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Recalibration Intervals for Radiation Detection Instruments



Leticia Pibida, Ben Estes, Manuel Mejias, Gladys Klemic


In this work we provide a summary of the National Conference of Standards Laboratories (NCSL) Recommended Practice RP-1 calibration interval analysis method, and examples of the method applied to three sets of available NIST data (two models of radiation survey meters and an electronic dosimeter). Information is provided for how to develop control charts to monitor individual instruments' performance over time in order to determine when instrument requires recalibration; examples are provided for a survey meter and a gamma-ray spectrometer.
Technical Note (NIST TN) - 2146
Report Number


NCSL RP-1 calibration interval analysis, calibration of radiation detection instruments, control charts


Pibida, L. , Estes, B. , Mejias, M. and Klemic, G. (2021), Recalibration Intervals for Radiation Detection Instruments, Technical Note (NIST TN), National Institute of Standards and Technology, Gaithersburg, MD, [online],, (Accessed April 13, 2024)
Created April 2, 2021, Updated November 29, 2022