Równoczesne tłumienie promieniowania gamma i neutronów w jednowarstwowej osłonie betonowej

• Autorzy: Safamehr Majid , Izadinia Mohsen , Hashemi Seyed Hamid , Hoseini Seyed Jalil

Identyfikatory

DOI

10.32047/CWB.2021.26.6.5

Warianty tytułu

EN

Simultaneous attenuation of gamma ray and neutrons in single layer concrete shield

• Języki publikacji: PL EN

Abstrakty

PL

Dzięki możliwości zastosowania różnych połączeń, beton jest jednym z najbardziej odpowiednich materiałów do konstruowania osłon przed promieniowaniem. W niniejszych badaniach kruszywo hematytowe i magnetytowe zastąpiło kruszywo zwykłe, oddzielnie i całkowicie w dwóch etapach. Dodatkowo zastępowano 2,5, 5 i 10% masowych cementu węglikiem boru. Przeprowadzono badanie gęstości, tłumienia promieniowania gamma z użyciem źródła Co 60 i promieniowania neutronowego z użyciem Am-Be 241. Zgodnie z wynikami, zastąpienie kruszywa zwykłego kruszywem hematytowym, poprawiło liniowy współczynnik tłumienia i makroskopowy przekrój czynny absorpcji neutronów betonu odpowiednio o 17% i 73%. Właściwości te poprawiły się odpowiednio o 37% i 105%, przy zastosowaniu kruszywa magnetytowego. Ponadto, przy dodaniu do składu betonu maksymalnie 10% węglika boru, makroskopowy przekrój czyny wzrósł o 120%, jednak liniowy współczynnik tłumienia zmniejszył się tylko o 5-8%. Oznacza to, że możliwe jest uzyskanie odpowiedniego tłumienia promieniowania gamma i wiązek neutronów jednocześnie, w jednej warstwie betonowej osłony. Ponadto stwierdzono dobrą zgodność wyników badań i symulacji Monte Carlo.

EN

The ability to create various compounds has made concrete one of the most suitable materials for constructing radiation shields. In this investigation, hematite and magnetite aggregates were used to replace ordinary aggregate, separately and completely in two stages. Boron carbide was also substituting cement at percentages of 2.5, 5, and 10 by mass. The density test, gamma irradiation with Co 60 and neutron irradiation with Am-Be 241 were performed. According to the results, the replacement of ordinary aggregates with hematite aggregates in concrete, improved the linear attenuation coefficient and macroscopic cross section by 17% and 73%, respectively. These parameters increased by 37% and 105%, respectively, by the use of magnetite aggregates. Moreover, with the addition of a maximum of 10% boron carbide to the concrete, the macroscopic cross-section increased by 120%, however, the linear attenuation coefficient decreased by between 5% and 8%. This means that it is possible to have a suitable attenuation of gamma ray and neutron beams in a single layer of concrete shield simultaneously. In addition, the results of the tests and Monte Carlo simulation were found to have good consistency.

Słowa kluczowe

PL

węglik boru; beton; promienie gamma; hematyt; magnetyt; neutron; osłona betonowa; tłumienie promieniowania

EN

boron carbide; concrete; gamma rays; hematite; magnetite; neutron; concrete shield; attenuation

• Wydawca: Fundacja Cement, Wapno, Beton
• Czasopismo: Cement Wapno Beton
• Rocznik: 2021
• Tom: R. 26, nr 6
• Strony: 503--514
• Opis fizyczny: Bibliogr. 22 poz., il., tab.

Twórcy

autor

Safamehr Majid

• Department of Civil Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran

autor

Izadinia Mohsen

• Department of Civil Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran

autor

Hashemi Seyed Hamid

• Department of Civil Engineering, Arak University, Arak, Iran

autor

Hoseini Seyed Jalil

• Department of Civil Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran

Bibliografia

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