E-Pulse, 2010-04

An online news publication of the College of Health and Human Services at Governors State University

Validation of MCNP NPP Activation Simulations for Decommissioning Studies by Analysis of NPP Neutron Activation Foil Measurement Campaigns

In this paper, an overview of the Swiss Nuclear Power Plant (NPP) activation methodology is presented and the work towards its validation by in-situ NPP foil irradiation campaigns is outlined. Nuclear Research and consultancy Group (NRG) in The Netherlands has been given the task of performing the corresponding neutron metrology. For this purpose, small Aluminium boxes containing a set of circular-shaped neutron activation foils have been prepared. After being irradiated for one complete reactor cycle, the sets have been successfully retrieved, followed by gamma-spectrometric measurements of the individual foils at NRG. Along with the individual activities of the foils, the reaction rates and thermal, intermediate and fast neutron fluence rates at the foil locations have been determined. These determinations include appropriate corrections for gamma self-absorption and neutron self-shielding as well as corresponding measurement uncertainties. The comparison of the NPP Monte Carlo calculations with the results of the foil measurements is done by using an individual generic MCNP model functioning as an interface and allowing the simulation of individual foil activation by predetermined neutron spectra. To summarize, the comparison between calculation and measurement serve as a sound validation of the Swiss NPP activation methodology by demonstrating a satisfying agreement between measurement and calculation. Finally, the validation offers a chance for further improvements of the existing NPP models by ensuing calibration and/or modelling optimizations for key components and structures

Indicators for the development of sustainable tourism in the Baltic Sea Region

SIGLEAvailable from TIB Hannover: RN 8422(2001,68) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Umwelt, Naturschutz und Reaktorsicherheit, Berlin (Germany)DEGerman

Indikatoren fuer die Entwicklung von nachhaltigem Tourismus im Ostseeraum

Available from TIB Hannover: RN 8422(2001,67) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

The discursive construction of national identities.

The concept of the nation as an imagined community has gained importance in the relevant literature during the last decade. How do we construct national identities in discourse? Which topics, which discursive strategies and which linguistic devices are employed to construct national sameness and uniqueness on the one hand, and differences to other national collectives on the other hand? These questions were investigated in our study on the Austrian nation and identity. Taking several current social scientific approaches as our point of departure, we have developed a method of description and analysis of these phenomena which has applications beyond the discursive production of national identity in the specific Austrian example studied. By focusing particularly on the discursive construction of (national) sameness, this study has broken new ground in discourse-historical analysis, which until now has mainly been concerned with the analysis of the discursive construction of difference