This report aims to serve as a guide in the execution of a thyroid monitoring program during the intermediate phase of response to a nuclear emergency. Calibration factors for some instruments verified in the framework of the Nordic project THY- ROID (Nyander P. 2014) are listed here as an example. For different times after the intake, we present in this guide the measured values in net count rate or dose rate for example instruments at the levels of the committed effective dose corresponding to a “no thyroid exposure” (< 1 mSv), the lower (20 mSv) and upper (200 mSv) action levels.
