<span>The person needs to be wearing a dosimeter badge. This is used as a way of measuring the overall radiation that has collected upon the person in the nuclear environment. While the badge does not actually protect against the radiation, it does give the wearer information about whether or not they are in a potentially unsafe situation.</span>
Individual Characteristics are properties of physical evidence that can be attributed to a common source with a high degree of certainty. Examples of individual evidence include anything that contains nuclear DNA, toolmarks, and fingerprints.