Method for shortening the statistical measurement times in the domain of radioactivity measurements

摘要

Method for the detection of an exceeding of a predetermined limiting value in a radioactivity measurement, with the following procedure steps: ;a total duration of measurement for a contamination measuring device is calculated, ;several single measurements are performed with the measuring device, with duration of measurement shorter than the total duration of measurement. ;after each single measurement, a probability is calculated on the basis of the previously measured measurement values, that with one or several single measurement(s) during a time period the mean value of all the single measurements exceeds the limiting value, the time period having at least the length of the time still remaining to the attainment of the total duration of measurement, ;in the case that the calculated probability is smaller than or equal to a predetermined certainty to exceed the limiting value in the remaining duration of measurement, a signal is generated that an exceeding of the limiting value did not occur and the procedure is ended, otherwise further single measurements are performed until either the total duration of measurement is reached or exceeded or until in one of the single measurements the calculated probability is smaller than or equal to the predetermined limiting probability, and the procedure is ended.