Ural Federal University
Russian Federation
Russian Federation
Russian Federation
Russian Federation
UDC 539.16.08
The results of the study of the stationary field of neutron radiation of the verification installation UKPN-1M under normal operating conditions are presented. The influence of reflecting and absorbing surfaces, materials of structures, equipment, and tooling on the moderation of the neutron energy spectrum is demonstrated. In certain points of the location space of the UKPN‑1M, the proportion of thermal neutrons in the energy spectrum increases by a factor of 7,5 and the proportion of intermediate energy neutrons doubles. For these local areas of space, the contribution to the equivalent absorbed dose in tissue of thermal neutrons increases from 0,3% to 3,7%, and for intermediate energy neutrons from 5,9% to 18,1% compared to areas of space without the moderation effect of the neutron energy spectrum by surrounding materials. The moderation effect of the neutron flux leads to an overestimation of the results of measuring the equivalent absorbed dose in tissue of neutron radiation compared to the calculated value of the equivalent absorbed dose by the energy spectrum by factors of 3,77, 1,54, and 1,25 respectively for DCS-96 with BDCN-96, DCS-96 with BDMN-96, and MKS-AT1117M with BDCN-06.
neutron radiation, spectra, moderation, dose rate, measuring instruments, metrology
1. Gorin N.V., Ekidin A.A., Golovihina O.S. Atomnaya energetika v nacional'nyh proektah Rossii// Izvestiya vysshih uchebnyh zavedeniy. Yadernaya energetika. 2021. № 1. S. 5-15.
2. Obschie principy radiacionnoy zaschity personala. Publikaciya 75 MKRZ. Ekaterinburg. URALRESCENTR, 1999.
3. Radiacionnaya zaschita i bezopasnost' istochnikov izlucheniya: mezhdunarodnye osnovnye normy bezopasnosti. Obschie trebovaniya bezopasnosti. Seriya norm bezopasnosti MAGATE № GSR, chast' 3, MAGATE, Vena, 2015.
4. Federal'nyy zakon ot 26.06.2008 № 102-FZ «Ob obespechenii edinstva izmereniy».
5. Ukaz Prezidenta RF ot 13 oktyabrya 2018 g. № 585 «Ob utverzhdenii Osnov gosudarstvennoy politiki v oblasti obespecheniya yadernoy i radiacionnoy bezopasnosti Rossiyskoy Federacii na period do 2025 goda i dal'neyshuyu perspektivu».
6. Ekidin A.A., Povarov V.P., Rosnovskiy S.V. i dr. Sovershenstvovanie sistemy dozimetricheskogo kontrolya neytronnogo oblucheniya personala Novovoronezhskoy atomnoy stancii//Izvestiya vysshih uchebnyh zavedeniy. Yadernaya energetika. 2023. № 1. S. 82-95.
7. M. Pyshkina, A. Vasilyev, A. Ekidin et al. «Study of neutron energy and directional distribution at the Beloyarsk NPP selected workplaces», Nuclear Engineering and Technology, 2020. P. 015.
8. Pyshkina M.D., Nikitenko V.O., Zhukovskiy M.V., Ekidin A.A. Neopredelennost' rezul'tatov izmereniy individual'nyh dozimetrov neytronnogo izlucheniya na rabochih mestah//ANRI. 2018. № 4(95). S. 15-23. URL: https:// www.doza.ru/anry/archive/95/1523.pdf (data obrascheniya: 24.09.2022).
9. Pyshkina M.D., Vasil'ev A.V., Ekidin A.A. i dr. Dozimetriya neytronnogo izlucheniya na rabochih mestah personala AO «Institut reaktornyh materialov»//Radiacionnaya gigiena. 2021. T. 14. № 2. S. 89-99.
10. Alekseev A.G., Pikalov V.A., Alekseev P.A. Popravochnye koefficienty pri izmerenii moschnosti ambientnogo ekvivalenta dozy neytronov//ANRI. 2021. № 4(107). S. 32-40.
11. Pyshkina M.D., Vasil'ev A.V., Ekidin A.A. i dr. Professional'noe obluchenie neytronami na Beloyarskoy AES//ANRI. 2021. № 3(106). S. 16-26.
12. INTERNATIONAL ATOMIC ENERGY AGENCY, Neutron Monitoring for Radiation Protection, Safety Reports Series no. 115, IAEA, Vienna, 2023.
13. V. Gressier et al. «Characterisation of the IRSN CANEL/T400 facility producing realistic neutron fields for calibration and test purposes», Radiat. Prot. Dosim., № 110, rr. 523‑527, 2004.
14. Metodika poverki neytronnyh dozimetrov v kollimirovannom puchke MI 172-78.
15. International standard ISO 8529. – Switzerland: International Standard Organization, 2021.
16. Prilozhenie k svidetel'stvu № 43717 ob utverzhdenii tipa sredstva izmereniya. Dozimetry-radio- metry DKS-96.
17. AT1117M Radiation Monitor. URL: https://atomtex.com/sites/default/files/datasheets/at1117m_ all_options_0.pdf (data obrascheniya: 2.12.2024).
18. M. Pyshkina, A. Vasilyev, A. Ekidin, M. Zhukovsky. Development and testing of a neutron radiation spectrometer in fields of radionuclide sources. AIP Conference Proceeding.
19. R. Bedogni, C. Domingo, A. Esposito, F. Fernandez. FRUIT: An operational tool for multisphere neutron spectrometry in workplaces. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 580, pp. 1301-1309.
20. Radiacionnaya bezopasnost'. Rekomendacii Mezhdunar. komis. po radiol. zaschite 1990 g. Publ. 60 MKRZ, ch. 2. Prinyaty MKRZ v noyab. 1990 g. Per. s angl. Kuz'minoy T.D. Pod red. Keirim-Markusa I.B. M.: Energoatomizdat, 1994. 207 s.
21. Publikaciya 103 Mezhdunarodnoy Komissii po radiacionnoy zaschite (MKRZ). Per s angl. pod obschey red. Kiseleva M.F. i Shandaly N.K. M.: Izd. OOO PKF «Alana», 2009.
