Irradiation capsule design for neutron coloration of topaz in a WWR-K reactor

Akhanov, Assyl; Aitkulov, M.T.; Sairanbayev, D. S.; Гизатулин, Ш. Х.; Романова, Н К; Shaimerdenov, A.A.; Chikhray, Y.; Ualzhanov, Zh; Zholdybayev, T. K.

doi:10.1016/j.apradiso.2022.110472

Cited by 4 publications

(2 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…After carrying out complex neutron-physical and thermophysical calculations and considering fi ve options for the design of the irradiation device [11], the optimal option was determined -a device with a sandwich screen made of boron carbide and tantalum. Subsequently, a mock-up of the selected option of the irradiation device design was made.…”

Section: Methodsmentioning

confidence: 99%

Optimization of conditions for topaz irradiation in the WWR-K reactor

Sairanbayev,

Shaimerdenov,

Aitkulov

et al. 2024

Nukleonika

Self Cite

View full text Add to dashboard Cite

Activation of impurities in topazes happens due to irradiation with thermal neutrons (induced radioactivity occurs), which complicates their further handling. This leads to the need for their long cooling for safe use. The Institute of Nuclear Physics (Kazakhstan) is conducting R&D to develop a method for the effective formation of color centers in topaz during their irradiation in the WWR-K reactor. An irradiation capsule design has been developed in which optimized conditions for irradiating stones in the neutron field of the reactor are formed. The capsule uses shielding materials made of boron carbide and tantalum to cut off thermal neutrons, resulting in a reduction in induced radioactivity in topaz. The effectiveness of the irradiation capsule was tested in the core of the critical facility. As a result, thermal neutron flux is reduced by 5.7 times and the induced activity of the tantalum is reduced by 2.2 times.

show abstract

Section: Methodsmentioning

confidence: 99%

Optimization of conditions for topaz irradiation in the WWR-K reactor

Sairanbayev,

Shaimerdenov,

Aitkulov

et al. 2024

Nukleonika

Self Cite

View full text Add to dashboard Cite

show abstract

“…С целью повышения эффективности радиационного окрашивания топазов в реакторе ВВР-К были рассмотрены несколько разных конструкций облучательной капсулы и на основании проведенных комплексных расчетов была выбрана конструкция облучательной капсулы, позволяющая создать условия для эффективного окрашивания топазов [1]. Однако, только расчетных данных недостаточно для заключения об эффективности конструкции облучательной капсулы.…”

Section: Introductionunclassified

Investigation of Neutron-Physical Characteristics of the Irradiation Capsule Designed for Radiation Coloring of Topaz in the WWR-K Reactor

Aitkulov,

Gizatulin,

Akhanov

et al. 2023

jour

View full text Add to dashboard Cite

This paper presents the results of the study of neutron-physical characteristics of an irradiation capsule designed for radiation coloring of topazes. The studies were performed in the core of the critical facility. Sandwich screen made of boron carbide powder and tantalum foil was used to cut off thermal neutrons inside the capsule. It is shown that using sandwich screen the thermal neutron flux is reduced by 8 times, and the fast neutron flux density is practically unchanged. The activation of the tantalum monitor is reduced by more than a factor of 2. The reactivity effect from loading the irradiation capsule with the screen into the core is minus 0.9% Δk/k.

show abstract