Production of a novel high strength heavy concrete using tourmaline and galena for neutron and photon radiation shielding
International Journal of Radiation Research. 2014; 12 (3): 277-282
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| IMEMR
| ID: emr-149953
المكتبة المسؤولة:
EMRO
ABSTRACT
High density concrete is extensively used for efficient radiation attenuation in radiotherapy rooms and nuclear reactors. Over the past eight years, some efficient galena-based concrete samples for shielding X or gamma rays was produced. The goal of this study was to produce a novel high density concrete against neutron and photon radiations using tourmaline and galena. Attenuation of gamma photons was measured using a Farmer type ionization chamber with a standard [60]Co buildup cap on a Theratron[60] Co therapy unit. Neutron shielding characteristics were measured by using an Am-Be source. The MCNP4C radiation transport computer code was used to investigate the effects of various shield thicknesses on the attenuation of gamma-ray photons and neutrons. The concrete samples had a density of 4.0- 4.2 g/cm[3]. The compressive strength was 326 - 560 kg/cm2. The calculated value for Half Value Layer [HVL] of the tourmaline-galena concrete samples for 60Co gamma rays was 2.72 cm, which is much less than that of ordinary concrete [6.0 cm]. The MC-derived HVL for photons with the same energy was 2.77 cm, which is in a good agreement with the experimental data. Moreover, ToGa concrete had up to 10 times greater neutron attenuation compared to that of the reference concrete. Tourmalin-Galena Concrete opens a new horizon in economic and efficient gamma/neutron shielding in high-energy radiotherapy bunkers, nuclear power plants, and shielding of radioactive sources
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الفهرس:
IMEMR
الموضوع الرئيسي:
Radiation
/
Sulfides
/
Monte Carlo Method
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Photons
/
Lead
/
Neutrons
نوع الدراسة:
Health_economic_evaluation
اللغة:
En
مجلة:
Int. J. Radiat. Res.
السنة:
2014