Analysis device for the detection of fission products by measurement of a radioactivity

An analysis device for the detection of fission products by measurement of a radioactivity, comprising:

• a first line for carrying a liquid sample;
• a first detector connected to the first line and configured for measuring the radioactivity of fission products contained in the liquid sample;
• a second line for carrying a gas sample;
• a second detector connected to the second line and configured for measuring the radioactivity of fission products contained in the gas sample, the first line and the second line each including an inlet side configured for connection to an expelling device configured for expelling fission products from at least one defective fuel rod and for removing liquid and/or gas samples containing fission products from the environment of the at least one fuel rod;
• and
• a separation device, separate from the expelling device, for separating gas from the first line carrying the liquid sample, the separation device including a line having an outlet opening for gas separated from the liquid sample, the outlet opening fluidly connected to the second line in such a manner that the gas separated from the liquid sample is suppliable as a gas sample through at least part of the second line to the second detector for measuring the radioactivity of fission products contained therein,
• the analysis device being configured such that gas samples expelled from the expelling device are suppliable to the second detector via the inlet side of the second line configured for connection to the expelling device and gas samples separated from the liquid sample are suppliable to the second detector via the line of the separation device having the outlet opening for gas separated from the liquid sample.