RADIOLOGICAL IMPACT OF USING DECORATIVE GRANITE AS AN ATTENUATOR OF IONIZING RADIATION.

Granite is a widely available rock, which can be used as a shielding material, for bulk in the form of the aggregate in concrete. It has the weakness that it is more radioactive than many other rocks, which can be used in concrete. This paper looks at its properties as a shielding material and the activity level.

A FEASIBILITY TEST FOR QUICK RADON RISK ASSESSMENT BY MEASURING AN IN SITU RADIATION DOSE RATE.

Radon concentration was estimated using an accumulation chamber equipped with AlphaGUARD radon monitor. It varies from 12.6 ± 1.

ASSESSMENT OF RADIOLOGICAL HAZARDS OF USING PETROLEUM RAW MATERIALS AND THEIR WASTE.

Activity concentrations of 238U, 232Th and 40K in raw and waste petroleum materials (Egypt and Kuwait) were measured using gamma ray spectrometer. The average values of 226Ra, 232Th and 40K were 21.1 ± 3.

Full core analysis of IRIS reactor by using MCNPX.

This paper describes neutronic analysis for fresh fuelled IRIS (International Reactor Innovative and Secure) reactor by MCNPX code. The analysis included criticality calculations, radial power and axial power distribution, nuclear peaking factor and axial offset percent at the beginning of fuel cycle. The effective multiplication factor obtained by MCNPX code is compared with previous calculations by HELIOS/NESTLE, CASMO/SIMULATE, modified CORD-2 nodal calculations and SAS2H/KENO-V code systems.

Effect of pretransplant hepatitis C virus on the development of new-onset diabetes mellitus after transplant in Egyptian living-donor renal allotransplant recipients at Mansoura Urology and Nephrology Center.

Objectives: New-onset diabetes mellitus after transplant is a common complication in renal allograft recipients. Recently, a high prevalence of diabetes mellitus has been reported in patients with chronic hepatitis C virus. The association between hepatitis C and diabetes mellitus is well demonstrated in the general population, but some controversy still exists.

Evaluation of radionuclide concentrations and associated radiological hazard indexes in building materials used in Egypt.

Radionuclide concentrations of ²²⁶Ra, ²³²Th and ⁴⁰K in different types of building materials used in Egypt were measured using gamma-ray spectroscopy. The results showed relatively moderate radionuclide concentrations for all samples except granite, which showed extremely high concentrations of 78.75 ± 2.

Evaluation of growth in low-body-weight kidney transplant Egyptian children: 25-year experience.

Background: Identification of problems associated with kidney transplantation in low-body-weight children is an essential step toward improving graft function and patient survival as well as quality of life.

Patients And Methods: This study comprised 63 renal transplant children weighing 25 kg or less at time of renal transplantation. All children received a living donor renal allotransplant between December 1984 and March 2009.

Simultaneous measurements of radon and thoron exhalation rates and comparison with values calculated by UNSCEAR equation.

We simultaneously measured radon and thoron exhalation rates in areas of weathered acid rocks in Japan to investigate the relationship between them and between measured and calculated radon exhalation rates. To calculate the radon exhalation rate, we used an equation proposed by UNSCEAR. Our analysis showed that both the radon and thoron exhalation rates measured at one location in a natural environment fluctuated widely, even within one day.