Question Relevance
What do people do in the areas where discrete radioactive objects are located? This will determine the relevant exposure scenarios, exposure pathways and parameter values for the assessment.
What is the population of discrete radioactive objects? Probability of encountering an object depends upon the population of objects present on the land. This depends on the number of objects found, the area monitored and the detection probability.
Is the population of objects constant or time-variant? The instantaneous probability of encountering an object is related to the instantaneous number of objects present. If the number of objects varies with time the so does the probability of encounter.