Русская версия English version

Comparative analysis of calculated and actual neutron and gamma-fields of neutron converter

D.A. Malygina, A.N. Semenenko

Vestnik IGEU, 2025 issue 2, pp. 81—86

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Abstract in English: 

Background. At the moment, only a few universities in Russian Federation have such an installation as a neutron converter, which results in a small number of scientific papers on this issue and the uniqueness of each of them. In this regard, it is necessary to carry out instrumental verification of the calculation results of the DOT software module when solving problems on installations with complex geometry. The purpose of this study is to verify the correspondence of the calculated (theoretical) values obtained in the DOT software package with the data obtained during the experiment.

Materials and methods. A trusted dosimeter-radiometer has been used to obtain the actual results. To obtain the calculated results, the software modules DOT-GEOM and DOT-III, as well as the auxiliary programs ListinG and Surfer 7.0 have been used.

Results. As a result of the experiment, the actual neutron and gamma fields of the neutron converter have been obtained. The authors have obtained calculated neutron and gamma fields of the same converter by modeling with subsequent calculations in the software module. The power distributions of neutron and gamma radiation doses at a distance of 10 cm and 100 cm from the surface of the thermal column of the neutron converter, obtained during the experiment and calculated in the software package, are equal within the error limits.

Conclusions. The results obtained allow us to conclude that the use of this computational code for modeling installations of complex geometry makes it possible to simplify the solution of similar problems using radiation sources of a different type. This technique can be used for the theoretical calculation of neutron and gamma fields of installations of complex geometry, for example, educational laboratory installations to study “Neutron Physics” and “Biological Protection”. However, a single study is not enough to fully analyze the operation of the program code on installations of complex geometry. Therefore, further research involves similar studies on other installations with different geometries and other radiation sources.

References in English: 

1. Dmitriev, S.M., Malyshev, V.A., Osipov, M.S., Samusenkov, V.V. Nauchno-issledovatel'skaya ustanovka dlya podgotovki inzhenerov-fizikov [Scientific research facility for the training of physics engineers]. Trudy NGTU [Proceedings of the NSTU]. Nizhny Novgorod, 2010.

2. Andreev, N.G., Vavilkin, V.N. Razrabotka programmy DOT-Activ dlya rascheta istochnikov i urovney izlucheniya ostanovlennogo reaktora v 2D-geometrii [Development of the DOT-Activ program for calculating sources and radiation levels of a stopped reactor in 2D geometry]. Sbornik statey Х Rossiyskoy nauchnoy konferentsii «Radiatsionnaya zashchita i radiatsionnaya bezopasnost' v yadernykh tekhnologiyakh» [Collection of articles of the X Russian Scientific Conference “Radiation protection and radiation protection in nuclear technologies”]. Moscow, 2015.

3. Andreev, V.V., Andreev, N.G., Kuvshinova, A.A., Levanov, S.L., Khudyakov, I.S. Raschetno-teoreticheskoe obosnovanie konstruktsii neytronnogo konvertera [Computational and theoretical substantiation of the neutron converter design]. Trudy NGTU [Proceedings of the NSTU]. Nizhny Novgorod, 2018, pp. 164–168.

4. Andreev, V.V., Andreev, N.G., Galstyan, K.G., Levanov, S.L. Obosnovanie radiatsionnoy bezopasnosti neytronnogo konvertera na vsekh etapakh zhiznennogo tsikla v ramkakh proektno-orientirovannogo obucheniya studentov NGTU im. R.E. Alekseeva [Justification of the radiation safety of a neutron converter at all stages of the life cycle within the framework of project-oriented training for students of NSTU R.E. Alekseeva]. Nauchno-tekhnicheskiy vestnik Povolzh'ya, 2019, no. 3, pp. 99–101.

Key words in Russian: 
нейтронный конвертор, нейтронное излучение, гамма-излучение, плутоний-бериллиевый источник, дозиметр-радиометр
Key words in English: 
neutron converter, neutron radiation, gamma radiation, plutonium-beryllium source, dosimeter-radiometer
The DOI index: 
10.17588/2072-2672.2025.2.081-086
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