Device for simulating an environment exposed to radiation and/or contaminated by radioactive components, comprising: - a beacon intended to simulate a source of radiation or a contaminated zone, the beacon comprising a radio frequency transmitter able to transmit a radio frequency identification signal with a first range, the radio frequency identification signal containing an identifier of the beacon, and a magnetic field generator able to generate a magnetic field with a second range, less than the first range, the magnetic field being distinct from the radio frequency identification signal, and - a user terminal for simulating a personal measurement device, the user terminal comprising a radio frequency receiver adapted to receive the identification signal transmitted by the transmitter, a magnetic field detector adapted to detect the magnetic field, and a microprocessor configured to calculate a distance between the user terminal and the beacon as a function of the received identification signal, and wherein the microprocessor is configured to: - compare the distance calculated between the user terminal and the beacon with a predefined threshold, and - if the calculated distance between the user terminal and the beacon is greater than the predefined threshold, calculating a simulated radiation dose rate value received by a user wearing the personal measuring device, as a function of a radiation value assigned to the radiation source or contaminated area, and the calculated distance between the user terminal and the beacon, and - if the calculated distance between the user terminal and the beacon is less than or equal to the predefined threshold, calculating a simulated radiation dose rate value received by the user wearing the personal measurement device, as a function of the magnetic field detected by the magnetic field detector. - a beacon intended to simulate a source of radiation or a contaminated zone, the beacon comprising a radio frequency transmitter able to transmit a radio frequency identification signal with a first range, the radio frequency identification signal containing an identifier of the beacon, and a magnetic field generator able to generate a magnetic field with a second range, less than the first range, the magnetic field being distinct from the radio frequency identification signal, and - a user terminal for simulating a personal measurement device, the user terminal comprising a radio frequency receiver adapted to receive the identification signal transmitted by the transmitter, a magnetic field detector adapted to detect the magnetic field, and a microprocessor configured to calculate a distance between the user terminal and the beacon as a function of the received identification signal, and - compare the distance calculated between the user terminal and the beacon with a predefined threshold, and - if the calculated distance between the user terminal and the beacon is greater than the predefined threshold, calculating a simulated radiation dose rate value received by a user wearing the personal measuring device, as a function of a radiation value assigned to the radiation source or contaminated area, and the calculated distance between the user terminal and the beacon, and - if the calculated distance between the user terminal and the beacon is less than or equal to the predefined threshold, calculating a simulated radiation dose rate value received by the user wearing the personal measurement device, as a function of the magnetic field detected by the magnetic field detector.