Abstract We have calculated the amount of radioactive heat production (RHP) that could possibly prevent postulated underground ocean Enceladus from freezing. An internal source is necessary to justify observed output and allow tidal dissipation heating models work. Also based on terrestrial evidence, we assumed most common radiogenic element can produce such 238 U. Our results show a minimum in...

In the context of feasibility study for geological disposal radioactive waste, this work focuses on numerical modeling hydromechanical response and induced damage zones around an experimental gallery at underground research laboratory (URL) Bure in France. A new phase-field method is first proposed by considering two independent fields order to easily describe both tensile shear cracks. The ext...

Chemical alterations of bentonite are critical factors for the ultra-long-term stabilization barriers and backfill in radioactive waste disposal. The chemical may deteriorate properties bentonite-based materials. However, experimental studies on effects swelling characteristics permeability materials have not been investigated extensively. In this study, were clarified based one-dimensional pre...

Background: Many radioactive compounds may be released into the environment and hence into the drinking water supplies due to the human activities. Radionuclides can also enter the food chain if the contaminated water is used for drinking or irrigation purposes. Objective: To estimate the annual effective dose of natural radioactive materials like 226Ra and 40K in drinking water of wells in Zan...

STUDIES OF BONE lWABOLISM WITH THE AID OF RADIOACTIVE STRONTIUM by D. e. JonesandD. H. Copp,M.D. January16T 1948 The kinetics of skeletal uptake and urinary excretion of radiostrontium were studied during the critieal first hour following intraperitoneal injection of a carrier-free dose. These experiments not only provided valuable data con.cerning the metabolism and fixation of this important ...

Radioactive cesium (Cs) is a significant concern due to its role as major byproduct of nuclear fission and potential for radioactive contamination. Internal contamination with Cs is...

Isotope dilution mass spectrometry (IDMS) is used extensively at NBS in the certification of elemental concentrations in Standard Reference Materials. It is regarded at NBS as a "definitive method," that is, a method of proven high accuracy. Since the theme of this symposium is accuracy in trace element analysis, it is appropriate to review the role IDMS plays in accurate inorganic analysis. Th...

Utilizing the gel electrophoresis/DNA binding assay and a new technique of direct binding of radioactive DNA to protein blots, we have investigated putative factors selective for the cAMP-responsive element (CRE) of the lactate dehydrogenase A subunit promoter in rat ovary nuclear extracts. Analysis of linker-scanning mutants of lactate dehydrogenase A subunit promoter fragments by DNA binding ...