THREE-DIMENSIONAL VISUALIZATION OF RADIOACTIVE CONTAMINATION FIELDS USING A COMPLEX GAMMA SPECTROMETRIC METHOD

The article presents the results of approbation of the complex method of three-dimensional characterization of radioactive contamination, which allows to build maps with the fields of radioactive contamination of areas and objects in real time. The proposed γ-spectrometric method is optimized for the conditions of necessity to carry out prompt primary assessment of radiation situation at NFC enterprises and consists in carrying out γ-spectrometric measurements using horizontal and angular collimating protection for the detector. Measurements in this case are a successive set of γ spectra in the control measuring points that form a network of radiation survey of the facility.

1. Ermilov A.N., Ermilova E.V. Natural and social aspects of radioecological situation in Kazakhstan // Arid ecosystems. – 2005. – Т. 1. – No. 26–27. – P. 39–48.

2. Kuzin R.E., Kozhin O.V., Lebedev I.V., Mogirev A.M., Pisanenko S.S. Information support of radiation control system at a large flow of investigated samples // Applied informatics. – 2012. – No. 2 (38). – P. 26–31.

3. Spiridonov S.I., Kuznetsov V.K., Panov A.V., Titov I.E. On the optimization of radioecological monitoring in the region of nuclear fuel cycle enterprises location // Radiation and risk. – 2019. – Т. 28. – No. 4. – P. 44–53.

4. Gavrilov P.M., Kokhomsky A.G., Izmestjev K.M., Seyelev I.N., Silaev M.E. Gamma-spectrometric method of controlling the activity and nuclide composition of lowactive solid radioactive wastes // Proceedings of the Tomsk Polytechnic University. – 2007. – Т. 310. – No. 2. – P. 99–102.

5. Robert R. Finck, Christopher L. Rääf. A rotating slit collimator-based gamma radiation mapper. Journal of Environmental Radioactivity. – 2017. – V. 177. – P. 225–232.

6. 6 Kantsev V.M., Lazarev L.N., Minaev I.G., Sushko N.I., Shulev V.I. Some questions of choosing the optimal geometric dimensions of cylindrical collimators for spectrometry of strong extended γ-sources // Proceedings of the Tomsk Kirov Order of the October Revolution and the Order of the Labor Red Banner Polytechnic Institute. – 1973. – Т. 235. – P. 61–65.

7. Whetstone Z.D., Dewey S.C., Kearfott K.J. Simulation of a method for determining one-dimensional 137Cs distribution using multiple gamma spectroscopic measurements with an adjustable cylindrical collimator and center shield // Applied Radiation and Isotopes. – 2011. –V. 69. – P. 790–802.