The 1MW pool-type Portuguese research reactor (RPI) was converted from using highly enriched uranium (HEU) to using low enriched uranium (LEU) fuel in September 2007. Although the new LEU core has the same number of fuel assemblies as the first HEU core, it has three assemblies less than the last HEU core and also has a different arrangement of the beryllium reflectors. Therefore, the primary i...

Since the installation of TRIGA MARK II reactors in National Centre for Nuclear Energy, Science and Technology (CNESTEN), Neutron Activation Data Analysis software (NADA) neutron activation analysis (NAA) based on relative method was first used; Over years, laboratory has been seeking to develop other softwares k0-INAA standardization namely K0-IAEA k0 Windows. In this paper we will focus compa...

PuBeneutrons sources of Educational Neutron Laboratory in the Center for Physical Sciences and Technology are used several activities including neutron activation educational purposes laboratory irradiation experiments. In this work we address dose rate estimation channels reconstructed PuBe storage device particular positions dedicated experiments using analysis (NAA) MCNP6 modelling.The resul...

This paper presents and discusses the Neutron Activation Analysis (NAA) results newly obtained from pumice pieces found decades ago at the Egyptian sites of Maiyana, Sedment, Kahun, and Amarna – now in the collections of the Ashmolean Museum, Oxford, and the Petrie Museum of Egyptian Archaeology, London – which could be successfully related to several volcanic eruptions in the Mediterranean. Th...

Instrumental neutron activation analysis as carried out at the National Institute of Standards and Technology (NIST) is inadequate for determining Al, Ni, and V at the levels found in the newly prepared Standard Reference Material (SRM) 1577c Bovine Liver. To overcome shortcomings in the value assignment, the authors initiated a cooperative approach using NAA with previously established chemica...

A solvent extraction preconcentration and separation method involving ammonium pyrrolinedithiocarbamate (APDC) and 4-methyl-2-pentanone (MIBK) in conjunction with neutron activation analysis (NAA) was employed for the simultaneous measurement of low levels of inorganic arsenic, antimony and selenium species in natural waters. Several critical factors affecting the APDC/MIBK-NAA method were stud...

The utility of multielement techniques for forensic analysis has been well documented in a recent article [1]. Typical analytical methods used for qualitative analysis include x-ray fluorescence (XRF), and emission spectroscopy (ES). Until the 1980's, neutron activation analysis (NAA) was the definitive method used for quantitative elemental analysis. However this technique has limited applicab...

Elemental composition of two groups 12 clay samples, at and above the Cretaceous/Paleogene (K/Pg) boundary Byala (Black Sea shore, Eastern Bulgaria), is studied by Neutron Activation Analysis (NAA) in order to trace impact events. Iridium anomaly a certain set elements, together with biostratigraphic data, point possible events recorded: first one (at K/Pg boundary), linked giant Chicxulub Mexi...

The two obsidian sources from the island of Melos (Greece), Agia Nychia and Demenegakion, are chemically characterized by three complementary analytical techniques. Ion beam analysis (IBA) comprising particle induced X-ray emission and particle induced gamma-ray emission, neutron activation analysis (NAA) and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) is applied to ...