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[en] The aims of the NKS project FOREST are to compile a sampling guide for radionuclide analysis of northern forests and to strengthen the Nordic collaboration in the field of forest radioecology by creating a network for scientists. Sampling procedures for soil, trees and under storey vegetation are prepared in collaboration with radio ecologists and forest researchers from Finland, Norway and Sweden. Besides the practical instructions for collecting samples in the forest ecosystems, the guide will also contain examples on sampling strategies, guidelines for site description, and quality assurance. At the end of the project a workshop will be organised where the sampling methodology will be discussed. Future challenges in the field of Nordic forest radioecology will also be discussed at this workshop, as will the functions of the network for forest radio ecologists and forest scientists. (au)
[en] The sluggish implementation of energy system transformation is causing a significant climate protection gap, so that the pressure to act to develop and establish a climate-neutral energy system is increasing. The measures formulated so far by the German government are not sufficient to make an adequate national contribution to the climate resolutions of Paris. The 2019 progress report of the Federal Ministry of Economics and Technology also shows a failure to meet targets at many levels. At its annual conference, the Research Association for Renewable Energies therefore discussed where the central technological and socio-economic challenges lie and what energy research can contribute to significantly increasing the speed of transformation. In the presentations collected here, the scientists show which steps are necessary to convert not only the power supply but also the mobility and heating/cooling supply sectors for buildings and industry to sustainable technologies. The opportunities offered by digitisation and questions of acceptance among the population were also addressed. The present conference proceedings summarise the results of the conference.
[de]Die schleppende Umsetzung der Energiewende verursacht eine deutliche Klimaschutzlücke, so dass der Handlungsdruck für die Entwicklung und den Aufbau eines klimaneutralen Energiesystems weiter steigt. Die bisher formulierten Maßnahmen der Bundesregierung reichen nicht aus, um einen adäquaten nationalen Beitrag für die Klimabeschlüsse von Paris zu leisten. Auch der Fortschrittsbericht 2019 des Bundeswirtschaftsministeriums zeigt auf vielen Ebenen eine Zielverfehlung. Daher diskutierte der ForschungsVerbund Erneuerbare Energien auf seiner Jahrestagung, wo die zentralen technologischen und sozio-ökonomischen Herausforderungen liegen und was die Energieforschung beitragen kann, um die Transformationsgeschwindigkeit deutlich zu erhöhen. Die Wissenschaftlerinnen und Wissenschaftler zeigen in den hier gesammelten Vorträgen, welche Schritte notwendig sind, um neben der Stromversorgung auch die Sektoren Mobilität sowie Wärme-/Kälte-Versorgung für Gebäude und Industrie auf nachhaltige Technologien umzustellen. Dabei wurden auch die Chancen der Digitalisierung und Akzeptanzfragen in der Bevölkerung thematisiert. Der vorliegende Tagungsband fasst die Ergebnisse der Konferenz zusammen.
[en] An accurate determination of radionuclides from various sources in the environment is essential for assessment of the potential hazards and suitable countermeasures both in case of accidents, authorised release and routine surveillance. Reliable radiochemical separation and detection techniques are needed for accurate determination of alpha and beta emitters. Rapid analytical methods are needed in the case of an accident for early decision-making. The objective of the first part of this project (RadChem-2004) has been to compare and evaluate radiochemical procedures used at Nordic laboratories for the determination of strontium, uranium, plutonium, americium and curium. The second part of the project (RadChem-2005) is more practically orientated. Each participant has worked with improvement of existing procedures or development of new procedures. One participant has also arranged an intercomparison exercise on the determination of natural radionuclides in ground water. (LN)
[en] The United Kingdom is pursuing a substantial and evolving programme towards minimising the problem of high radon levels in homes. Work focuses on those areas of the country which early surveys have shown to have a significant proportion of affected homes, and involves cooperation between central and local Government, research institutions and private companies. Elements of the programme include: radon measurements on demand from householders in areas of potentially high radon and systematic surveys to refine knowledge of these areas; research into geological, epidemiological, psychological and financial aspects of the problem; the development and dissemination of advice on remedial and preventive measures; and a comprehensive approach to communication with all parties involved in issues of domestic exposure to radon. An account of progress is given, and future options are outlined towards fulfilling the Government's intention that substantial progress towards dealing with the impact of radon should be made by the close of the century. (author)
[en] Conclusions: • The ENEA objective is to support the Italian industrial system in the design, development and construction of the LFR demonstrator ALFRED and, in a longer time, of the ELFR First Of A Kind. • The HLM technology is under development in several European countries. • The viable route to ALFRED seems to be the construction in a European country able to access the EC structural funds for cohesion: Romania has already expressed this purpose. • The conceptual design is still ongoing. The numerical tools for heavy liquid metals have been implemented and tested since years. • The R&D associated with main components is ongoing. Most of the necessary facilities are operational. • The design trade-off between a “adiabatic core” and a “safe core” is achieved. • The issue of fuel cladding material remains the toughest issue to deal with. This is mainly due to the qualification effort which must be envisaged even in irradiation facilities. • Italy is looking for a foreign partner for irradiations aimed to LFR fuel development testing
[en] The publication presents ten selected papers reporting on the progress and status of R and D activities carried out within the project, for establishing and demonstrating processes and methods for application to the decommissioning of nuclear installations at the end of their serviceable life, or to backfitting work in existing nuclear installations. Further tasks reported include studies and experiments relating to the treatment and conditioning of radioactive wastes from decommissioning work and the preparation of specified waste forms for emplacement in a repository, or the development of a novel method for surface decontamination of structural members made of concrete, or possibilities of preparing radioactive or contaminated metallic materials from nuclear installations for recycling and safe re-use, or for the production of components for use in nuclear installations. (orig.)
[de]Berichtet wird in 10 ausgewaehlten Fachvortraegen ueber Vorhaben zum Forschungsschwerpunkt Entwicklung und Demonstration von Techniken und Verfahren, die bei der Demontage von kerntechnischen Anlagen nach Ende ihres bestimmungsgemaessen Gebrauchs aber evtl. auch im Rahmen von Backfitting-Massnahmen zur Anwendung kommen koennen. Es wird in dieser Vortragsreihe auch ueber Untersuchungen und durchgefuehrte Versuche zur Behandlung, Konditionierung und endlagergerechten Verpackung von radioaktiven Abfallstoffen aus der Stillegung berichtet, des weiteren ueber den derzeitigen Stand der Entwicklung eines neuartigen Verfahrens zur Oberflaechendekontamination von Baukoerpern aus Beton und ferner ueber Moeglichkeiten der Rezyklierung von radioaktiv kontaminierten/aktivierten metallischen Werkstoffen aus kerntechnischen Anlagen mit dem Ziel einer schadlosen Wiederverwertung oder fuer die Fertigung von Komponenten zum Wiedereinsatz im kerntechnischen Bereich. (orig.)
[en] Centre de la Manche disposal facility is the first French surface disposal facility for low and intermediate level short lived radioactive waste. It has been operated for 25 years, from 1969 to 1994. The facility was licensed for the institutional control period in 2003. As there were significant changes in the design of vaults or in waste acceptance criteria during the 25 years of operation, it was decided to implement a capping system including a bituminous membrane that would be able to sustain strains that might be caused by the settlement of waste packages in the eldest parts of the facility, where conditioning modes were different than those as presently practiced. In 2008 Andra submitted to ASN, the regulatory body in France, a file related to the safety of the facility including a study of the opportunity to modify capping system. Andra's project was to improve long term watertightness and to stabilize the sides of the cover by smoother slopes through a progressive approach. This file was completed in early 2015 by a progress report providing in particular results on studies related to the durability of the bituminous membrane. They take into account periodical measurements performed on samples of the membrane extracted from the capping system and studies performed on the phenomenology of ageing of the membrane. These data support the strategy of improvement of the capping system developed by Andra in order to achieve a more passive surveillance. (authors)
[en] The AZTLAN platform project: development of a Mexican platform for the analysis and design of nuclear reactors, financed by the SENER-CONACYT Energy Sustain ability Fund, was approved in early 2014 and formally began at the end of that year. It is a national project led by the Instituto Nacional de Investigaciones Nucleares (ININ) and with the collaboration of Instituto Politecnico Nacional (IPN), the Universidad Autonoma Metropolitana (UAM) and Universidad Nacional Autonoma de Mexico (UNAM) as part of the development team and with the participation of the Laguna Verde Nuclear Power Plant, the National Commission of Nuclear Safety and Safeguards, the Ministry of Energy and the Karlsruhe Institute of Technology (Kit, Germany) as part of the user group. The general objective of the project is to modernize, improve and integrate the neutronic, thermo-hydraulic and thermo-mechanical codes, developed in Mexican institutions, in an integrated platform, developed and maintained by Mexican experts for the benefit of Mexican institutions. Two years into the process, important steps have been taken that have consolidated the platform. The main results of these first two years have been presented in different national and international forums. In this congress, some of the most recent results that have been implemented in the platform codes are shown in more detail. The current status of the platform from a more executive view point is summarized in this paper. (Author)
[en] The self-extracting cyclotron is a high-intensity 14 MeV H+ machine for isotope production. There is no electrostatic deflector. Extraction is achieved with a special shaping of the magnetic field. There are two long poles and two short poles, both with an elliptical gap profile; this provides a steep fall off of the magnetic field at the pole radii. An extraction groove is machined in the iron of one of the longer poles. First harmonic coils create a large orbit separation at the entrance of the extraction path and extract the beam. The machine is presently installed in the industrial isotope production site where the final commissioning and tests took place. Beams of more than 1.5 mA have been extracted and transported. Further development is ongoing in order to increase the current on target to at least 2 mA in the coming months. Commercial isotope production will start in the course of this year. The concept of the machine is explained and the layout of the machine and beam lines is presented. Results of orbit calculations and central region optimizations are given. Results of the measurement of extracted beam shapes and emittances are given. The progress and present status of the project are discussed. (author)