DEVELOPMENT ATTEMPT OF SUBMERSIBLE COMPLEX FOR DETECTING EXPLOSIVE, TOXIC AND RADIOACTIVE MATERIALS IN POTENTIALLY DANGEROUS OBJ ECTS UNDER WATER
The main problems that were solved during development of submersible complex operating on thermal neutron analysis basis for detecting explosive, toxic and radioactive materials in potentially dangerous objects under water are considered. Main tasks were: selection of watertight capsule material, selection of neutron generator type, selection of detector type and detector characteristics. On the example of obtained spectra, the choice of option for complex construction is explained. As a result, experimental specimen of the complex was built and tested. Complex consisted of: d-d type neutron generator emissing neutrons in continuous mode with neutron yield of 1,5·107 s-1, BGO type gamma-detector and computer with special software. The complex allows detection of 3 kg of explosive and 5 kg of sulfur-containing toxic materials for 10 minutes at distance up to 10 sm, and radioactive substances dissolved in water, including 137Cs with volumetric activity of more than 500 Bq/m3. Options for the complex operation are given.