Hybrid monitoring concept development. Modeling of pulse height spectra of gamma-radiation emitted from radioactive cloud released from NPP

In emergency situations with the release of radioactivity to the environment, possible radiation doses to the affected public are estimated with computational modeling. However, it should be noted that the estimates to a certain degree depend on various calculation parameters that may make the predicted radiation doses inconclusive. To reduce occurring uncertainties is possible by adjusting estimated outcomes with measurement data. The gamma-radiation spectra from the released radioactive cloud is measured by systems for radiation situation monitoring in the area surrounding the source of radioactive materials release. The feasibility study aimed at obtaining information needed for improvement of radiation doses estimates quality should be carried out. Due to certain problems related to performance of experimental work, there is the need to develop new approach to calculate gamma-spectra of radioactivity emitted from the released cloud. The solution of this problem will allow to select the parameters of equipment and measurement parameters necessary for adjusting the forecasts of radiation doses to the population in a case of accidents with a radiation factor based on the results of processing gamma radiation spectra.