Computerized system for nuclear emergency response in the ENEA Nuclear Research Center of Frascati

At the National Committee for Research and Development of Nuclear Energy and Alternate Energy Sources (ENEA) Center of Frascati, there are several radiation-producing machines: two tokamaks and three electron accelerators; moreover, a neutron generator will begin to operate in a short time. A completely automatic monitoring system has been developed. Radiation control is performed by means of classical active and passive detectors. An automatic acquisition system has been developed: Measured quantities are acquired and stored in a specific data base; information regarding radioactivity levels, machines status, personnel dosimetry and meteorological parameters are available in real time. If any of the radiometric quantities exceeds appropriate reference levels, the following operations automatically activate: An automatic switch turns off the machines and an alarm signal is broadcast to the Health Physics group. In addition, the "Nuclear Emergency" software module starts if a radionuclide emission is detected. This module has been implemented to provide response to radiological emergencies in the ENEA nuclear research centers. The modularity of the computer-based system allows its utilization also in other nuclear centers, such as at nuclear power plants. When activated, the "Nuclear Emergency" displays an alarm signal and informs the Health Physics group about the monitor's location and characteristics and the measured data exceeding the reference level. If emission of radionuclides occurs, a preliminary evaluation of their diffusion in the atmosphere and an estimation of the population dose are performed. Statistical analysis of the event is also possible.