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Information × Registration Number 0203U008036, 0100U003303 , R & D reports Title Development of techniques of monitoring of structure of NPP radioactive gas ejection's and contamination by divided substances popup.stage_title Head Rudychev V., Registration Date 10-04-2003 Organization Kharkov National University named after V.N.Karazin popup.description2 The subject under investigation in the present work is gas-aerosol release, which accompanies VVER-1000 equipped NPP operation. Release propagation leads to the environment contamination and additional people exposure, thus there is a social need in monitoring of content of radionuclide release of NPP and also in observation of contamination with fission products. The specific object under investigation is the radiation from release components which can be used for isotope identification and measuring. This is naturally added by the problem of remote detecting of fission materials that can occur in the environment in uncontrolled way. The goal of the work is to prove a possibility of creation of the monitoring technique for NPP release which would be additional to the existed one and is based on gamma spectroscopy without gas mixture sampler. Also we take aim to propose the method for a remote detecting of fission materials. The base method of project execution is analysis of radionuclides radiation when they are transported inside piping system for gas release purification after VVER-1000 discharge, and using the existed gamma spectrometers for this purpose. During last stage an algorithm was completed for the reconstruction of spectral composition of nuclide radiation with Ge(Li) detector using. A calibration procedure is proposed for the efficiency obtaining in wide energy region for cylindrical gas-aerosol source. The sensitivity and efficiency error were determined and that was the base for predicting the list of radionuclides, that can be checked with the method if they are components of release. The previous experiments were performed in the course of remote detecting of fission materials with a pulsed high-current neutron generator, which radiated the model at 2.4m distance, and the induced signal was detected by neutron-gamma sensor. The conclusion has been expressed that neutron sounding method can be successfully used for fission materials remote detecting under reverse signal checking from fission neutrons. Product Description popup.authors popup.nrat_date 2020-04-02 Close