An experimental investigation on the effects of barite/hematite on the radiation shielding properties of serpentine concretes

Masoud, M.A.; Kansouh, W.A.; Shahien, Mohamed G.; Sakr, K.; Rashad, Alaa M.; Zayed, Ahmed M.

doi:10.1016/j.pnucene.2019.103220

Cited by 61 publications

(29 citation statements)

References 58 publications

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“…The duration of the gamma ray counting also varies from as short as 90 s to as long as 120 min. At 120 min and 90 s of measurement, the statistical uncertainty of the data is ±2% and ±0.3%, respectively [ 62 , 110 ].…”

Section: Radiation Shieldingmentioning

confidence: 99%

“…For neutron radiation, radiation sources can either be a plutonium–beryllium source (Pu–Be) or a americium–beryllium source (Am–Be). Pu–Be emits energy of 3.92 and 4.43 MeV, while Am–Be emits about 4.5 MeV [ 110 , 160 ]. As neutrons have no charge, their detection is performed indirectly through nuclear reactions that produce charged particles [ 161 ].…”

Section: Radiation Shieldingmentioning

confidence: 99%

“…The total intensity of neutrons with and without RSC is used to determine the total neutron cross section or macroscopic removal cross section ∑ R (E n ) in cm −1 , which can be calculated using Equation (6) [ 110 , 160 ]

where t is the thickness of sample (cm), and I 0 and I are the total intensity of the fast neutron flux emitted without and with the sample, respectively. The total macroscopic removal cross section, ∑ R (E n ), is the probability of a fission or fast neutron having a first collision that would displace it from the group of penetrating neutrons [ 162 ].…”

Section: Radiation Shieldingmentioning

confidence: 99%

“…Similar to gamma ray attenuation, ∑ R (E n ) is used to determine HVL and relaxation length λ using Equations (7) and (8) [ 110 ]

…”

Section: Radiation Shieldingmentioning

confidence: 99%

“…The combination of serpentine and heavyweight minerals as the aggregate in concrete has also been studied. A study on serpentine replacement with barite or hematite as the aggregate was conducted with exposure to Pu–Be at an energy level of 0.8–11 Mev [ 110 ]. This finding indicates that replacing serpentine with 50% barite achieved the highest ∑ R (E n ) of 0.1484 cm −1 .…”

Section: Radiation Shieldingmentioning

confidence: 99%

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Recent Trends in Advanced Radiation Shielding Concrete for Construction of Facilities: Materials and Properties

et al. 2022

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Nuclear energy offers a wide range of applications, which include power generation, X-ray imaging, and non-destructive tests, in many economic sectors. However, such applications come with the risk of harmful radiation, thereby requiring shielding to prevent harmful effects on the surrounding environment and users. Concrete has long been used as part of structures in nuclear power plants, X-ray imaging rooms, and radioactive storage. The direction of recent research is headed toward concrete’s ability in attenuating harmful energy radiated from nuclear sources through various alterations to its composition. Radiation shielding concrete (RSC) is a composite-based concrete that was developed in the last few years with heavy natural aggregates such as magnetite or barites. RSC is deemed a superior alternative to many types of traditional normal concrete in terms of shielding against the harmful radiation, and being economical and moldable. Given the merits of RSCs, this article presents a comprehensive review on the subject, considering the classifications, alternative materials, design additives, and type of heavy aggregates used. This literature review also provides critical reviews on RSC performance in terms of radiation shielding characteristics, mechanical strength, and durability. In addition, this work extensively reviews the trends of development research toward a broad understanding of the application possibilities of RSC as an advanced concrete product for producing a robust and green concrete composite for the construction of radiation shielding facilities as a better solution for protection from sources of radiation. Furthermore, this critical review provides a view of the progress made on RSCs and proposes avenues for future research on this hotspot research topic.

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Section: Radiation Shieldingmentioning

confidence: 99%