Determination of gamma and fast neutron shielding parameters of magnetite concretes

Oto, Berna; Gür, Aycan; Kavaz, Esra; Çakır, Tahir; Yaltay, Namık

doi:10.1016/j.pnucene.2016.06.011

Cited by 99 publications

(32 citation statements)

References 42 publications

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“…There have been many studies on the shielding parameters of concretes, most of which have focused on the transmission of gamma rays 9,10 and low energy neutrons. 11,12 There is surprisingly very little work reported using fast neutrons. The concept of an effective neutron-removal cross-section 1,13 is a useful parameter to express neutron attenuation in hydrogenous media.…”

Section: Attenuation Of Fast Neutrons By Concretementioning

confidence: 99%

Neutron transmission studies for concrete used in the nuclear industry

Buffler

Hutton

Leadbeater

et al. 2020

Int. J. Mod. Phys. Conf. Ser.

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Progress in the establishment of a fast neutron beam reference facility for the non-destructive testing of concrete and other materials used in the nuclear industry is described. An additional area of interest is the development of methods for the independent verification of the alignment to regulatory codes of the constituent materials used in concrete mixes for nuclear facilities, both existing and planned. The project is based on the principle of analyzing the distributions in energy of the neutrons transmitted through the sample. Modern methods of spectrum unfolding allow such analyses to be undertaken without the need for the neutron beam to be ns-pulsed in order to measure neutron energies by time-of-flight. First measurements and analyses of mortar (concrete without large aggregate) using continuous beams of fast neutrons are presented.

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Section: Attenuation Of Fast Neutrons By Concretementioning

confidence: 99%

Neutron transmission studies for concrete used in the nuclear industry

Buffler

Hutton

Leadbeater

et al. 2020

Int. J. Mod. Phys. Conf. Ser.

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show abstract

“…In the case of shielding against high-energy photons (gamma radiation) the increase in concrete density by change of aggregate type, e.g., from a normal to a heavy-weight type, is sufficiently effective [12,13]. Protection against neutrons is a more complex and sophisticated task [14][15][16], because neutrons are no-charge particles travelling in straight lines and interacting only with atomic nuclei while passing through matter. Neither the electrons surrounding a nucleus (the atomic electron cloud) nor the electric field caused by a positively charged nucleus affect a neutron's flight.…”

Section: Introductionmentioning

confidence: 99%

Influence of Polymer Modification on the Microstructure of Shielding Concrete

2020

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In this paper an analysis of the influence of polymer modification on the microstructure, shielding properties against neutrons, and compressive strength of heavy-weight magnetite concrete is carried out. The modifications involve the addition of acrylic or epoxy dispersions as well as micro- or/and macrofibers. A computer image analysis method is used to evaluate the microstructure of concretes and parameters of pore structure are calculated; these parameters include relative volume fraction, relative specific surface area, and pore arrangement ratios, including a proprietary ratio based on Voronoi tessellation. An assessment of significance of differences between stereological parameters of reference concrete and polymer modified concretes, as well as the impact of polymer form (dispersion or fibers) on shielding properties and compressive strength is carried out using Student’s t-test. The results show that except for the effect of the addition of both polypropylene micro- and macrofibers on the relative volume of pores, all other modifications result in statistically significant changes in the values of stereological parameters. Nevertheless, it is shown that neither polymer dispersions nor fibers have a statistically significant impact on shielding properties, but that they do influence compressive strength.

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“…Recently with the increase in the use of radiation in various applications in daily life, many researchers have focused on examining the gamma or X ray attenuation properties of many materials to reduce or retain X or gamma rays. In the literature, several experimental or computational studies have been extensively carried out to estimate X or gamma ray attenuation behaviors of diverse materials such as concrete (Akkurt, Basyigit, Kilincarslan and Mavi, 2005;Singh and Badiger 2014;Oto, Gur, Kavaz, Cakir and Yaltay, 2016), glass system (Mostafa, Issa and Sayyed, 2017;Kurudirek, Büyükyıldız and Özdemir, 2010;Sayyed, Kaky, Şakar, Akbaba, Taki and Agar, 2019a) stainless steel (Akkurt 2009;Singh, Medhat and Shirmardi, 2015;Alim, Şakar, Baltakesmez, Han, Sayyed and Demir, 2019) various ores (Oto, Yıldız, Akdemir and Kavaz, 2015) and like.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Mass Attenuation Coefficient, Effective Atomic Number and Electron Density of Some Aluminum Alloys

Cengiz

Çağlar

2020

Caucasian Journal of Science

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Aluminum alloys have numerous application fields in today's technology due to their excellent mechanical features, high electrical and thermal conductivity, magnificent corrosion resistance, good weldability, good formability and similar properties. In the present study, we investigated the mass attenuation coefficient (µm), effective atomic number (Zeff) and effective electron density (Ne) of four different type commercially available aluminum alloys. For his purpose, µm, Zeff, and Ne values of 5083, 5754, 6061 and 6082 coded aluminum alloys were determined by employing NaI(Tl) gamma ray spectrometry at 661.66,1173.23 and 1332.48 keV gamma ray energies obtained from 137 Cs and 60 Co radioactive sources. Also these parameters theoretically determined using PhyX-PSD computer program at the photon energies of 1 keV-1 GeV and compared with the experimental results. The variation of µm, Zeff, and Ne with incident photon energy presented graphically. From the obtained results it might be concluded that the µm, Zeff, and Ne values for studied alloy samples depend on the incident photon energy and elemental composition of alloys. In addition, it was observed from the theoretical and experimental results that aluminum alloys under study have almost the same gamma ray attenuation capacity.

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Determination of gamma and fast neutron shielding parameters of magnetite concretes

Cited by 99 publications

References 42 publications

Neutron transmission studies for concrete used in the nuclear industry

Neutron transmission studies for concrete used in the nuclear industry

Influence of Polymer Modification on the Microstructure of Shielding Concrete

Assessment of Mass Attenuation Coefficient, Effective Atomic Number and Electron Density of Some Aluminum Alloys

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