The paper addresses the problem of MOX-fuel self-protection during full cycle of MOX-fuel management. Under conditions of the closed LWR cycle the proliferation-resistance levels were evaluated for fresh and spent MOX-fuel with 231Pa and Cs feed. As it follows from the paper results, combination of these two admixtures being doped into MOX-fuel is able to enhance the inherent radiation barrier ...

Concrete is probably the most extensively used construction material in the world. However, environmental concerns regarding rapid consumption of natural resources and CO2 emission during cement manufacturing process have brought pressure to reduce cement consumption by the use of cement replacement materials (CRMs). The utilization of calcined clay (metakaolin) and silica fume in concrete has ...

The proton form factor, two-photon annihilations into p¯ p as well as exclusive charmonium decays are critically examined. It will be argued that the standard perturbative QCD analysis of these reactions fails, i. e. the need for additional contributions can convincingly be demonstrated. Possible dynamical mechanisms such as colour-octet admixtures to the charmonium states or diquarks inside ba...

The analysis of polymorphic microsatellites is relevant for forensic, paternity testing and to study genetic admixtures and the genetic relationships between populations. Colombia has the second highest number, after Brazil, of Amerindian tribes in America (around 81) followed by Mexico (68 tribes) and Venezuela (20 tribes). Contrary to other genetic markers such as HLA and blood groups, Short ...

abstract: Over the years, Portland cement concretes have undergone increasing demands for constructability, cost, quality, and environmental impact. These were met, mainly, through changes in composition introduction of chemical admixtures. In this sense, a literature review, authors sought to create collection information on evolution these materials their standards from 1937 2020 Brazil . Thi...

INTRODUCTION: Skeletal metastases frequently occur in patients suffering from breast cancer, the spine being the most common site. An improved survival rate of breast cancer has led to a rise in the incidence of skeletal metastases, resulting in serious morbidity (e.g. collapsed vertebrae) and a marked decrease in quality of life. The management of spinal metastatic lesions currently involves i...

Effects of two admixtures, calcium carbonate powder (CCP) and micro silica gel (MSG) on self-compacting concrete (SCC) properties, such as workability, compressive strength, durability are investigated. Results, show that, in some cases, with MSG is unable to provide a stable condition, although flowability higher. Experimental results indicate that the effect CCP sustainability, strength mixtu...

This study experimentally investigated the effects of surfactants and water-repelling agents on hydration process, relative humidity, mechanical properties Portland cement pastes. Based measurement results, degree hydration, saturation, capillary tension autogenous shrinkage, magnitude shrinkage were simulated using a numerical model. In model, elastic creep components calculated separately, co...