Dose rate warning device
A dose rate warning device is a measuring device that is used in radiation protection operations by emergency services to determine the limit of the danger zone .
functionality
The dose rate warning device is based on the principle of the Geiger-Müller counter tube . Due to the shielding effect of the housing, only gamma radiation is measured. If the dose rate of the incident radiation exceeds the set value, an alarm tone is triggered. In Germany this is 25 µSv / h as this is the critical value for defining the danger area in radiation protection operations. Apart from this alarm, the dose rate warning device has no other function, so there is usually no display.
Combined devices
Dose rate measuring devices usually also have an integrated dose rate warning function. However, since this measuring device is used differently for tactical purposes, it cannot be used to define the danger zone at the same time.
Use in radiation protection
The team equipped with the dose rate warning device can use the alarm of the device to recognize where the border to the danger area runs and mark it with barrier tape, for example. As soon as the object has been circled once and thus completely secured, the blockage that has been set up is continuously checked with the dose rate warning device in order to detect the spread of radiation at an early stage.