scholarly journals Knowledge Management in the Federal Company for Radioactive Waste Disposal (BGE)

2021 ◽  
Vol 1 ◽  
pp. 251-253
Author(s):  
Gunnar Hoefer ◽  
Sebastian Wanka ◽  
Peter L. Wellmann

Abstract. With completion of the restructuring of the nuclear waste disposal landscape in Germany, the competences for construction and running of repositories for radioactive waste products are since 2017 with the Federal Company for Radioactive Waste Disposal (BGE). The BGE has over 50 years of experience in the disposal of nuclear waste in Germany. Over a period of several decades substantial effort was put into the research and developmental work on nuclear waste disposal in Germany, which led to a considerable state of knowledge, both thematically and quantitatively; however, so far no consistent overview exists on the various works and therefore on the total state of knowledge, as these works only partially exist or existed in the very different organizations (diffuse and local) within the nuclear waste disposal landscape. The emerging loss of specialist knowledge in Germany caused by the withdrawal from nuclear energy and the recession of national mining activities is doing the rest. This imminent loss of knowledge must be taken into consideration as a critical factor, especially considering the age structure within the BGE and the simultaneously occurring processes on selection of a site for disposal of highly radioactive waste products. For this reason, in the division of research and development/knowledge management (R&D/KM) an independent department for knowledge management was created in order to establish an infrastructure for knowledge management and a connection between knowledge management platforms and knowledge carriers in the company. In addition to the collection and distribution of the available knowledge, current results from research and development are also to be fed into the “learning organization”. For this purpose, knowledge management provides a digital information basis, into which current results from research and development are also entered as a knowledge store. This knowledge store consisting of over 14 000 documents, contains mostly research reports and scientific publications, which are concerned with diverse topics for the final disposal of radioactive waste products in geological formations. The total stock of internal company documents available can be accessed with a browser-based text analysis software. Intelligent search algorithms render the textual contents accessible, combine them with synonyms and dictionaries deposited in the system and make the resulting hits of the search queries available for the user in order of importance in summarized and full text versions. Using specific query terms, as known from search machines or library servers, this software analyzes the available documents of the digital information basis and in a brief summary of results, in addition to a brief description of the contents, the naming of relevant keywords, the identification of sources, compilers, institutions, knowledge carriers and an extended optimized information analysis of hits, also provides the possibility to retrieve the complete document and the download. The research options can, in addition to the queries via the established internet search engines also be combined with queries via the incorporated information or databank catalogue of national and international scientific institutions or libraries, which are concerned with research programs relevant for repositories. In order to further increase and optimize the information possibilities for employees of the BGE, a variety of knowledge landscapes has been implemented in the intranet, which enable specific queries on topics, expert information, institution, country and persons. Using these tools a first essential target of knowledge management, the collection, availability and distribution of written down knowledge in the company has been achieved. For the development of person-related and group-related knowledge the department of knowledge management is compiling concepts, which can only be implemented together and jointly with them, as they border on certain interfaces in the organization/company. This particularly concerns measures that fall into the areas of human resources, such as personnel management and personnel strategies or in the area of the particular project; keyword lessons learnt.

2010 ◽  
Vol 45 (2) ◽  
pp. 153-160
Author(s):  
Daisuke SUGIYAMA ◽  
Taiji CHIDA ◽  
Hiroshi KIMURA ◽  
Masashi FURUKAWA

2011 ◽  
Vol 5 (1) ◽  
pp. 93 ◽  
Author(s):  
Hitoshi Makino ◽  
Kazumasa Hioki ◽  
Hiroyuki Umeki ◽  
Hiroyasu Takase ◽  
Ian G. McKinley

2020 ◽  
Vol 54 ◽  
pp. 157-163
Author(s):  
Axel Liebscher ◽  
Christoph Borkel ◽  
Michael Jendras ◽  
Ute Maurer-Rurack ◽  
Carsten Rücker

Abstract. The Federal Office for the Safety of Nuclear Waste Management (BASE – Bundesamt für die Sicherheit der nuklearen Entsorgung) is the German federal regulatory authority for radioactive waste disposal. It supervises the German site selection process and is responsible for the accompanying public participation. Task related research is an integral part of BASE's activities. The projects MessEr and übErStand compiled the state-of-the-art science and technology regarding surface based exploration methods suitable for addressing the criteria and requirements specified in the German Site Selection Act. The results support BASE to review and define the surface-based exploration programs to be executed by the national implementer BGE (Bundesgesellschaft für Endlagerung mbH). To support BASE in reviewing the application of the exclusion criteria “active fault zones” according to the Site Selection Act, the project KaStör reviewed the current knowledge on active faults and fault zones in Germany and recommends methodological approaches to date and identify the activity of faulting. For the time being, the Site Selection Act defines 100 ∘C as a draft limit on the temperature at the outer surface of a repository container for all host rocks. The project Grenztemperatur studied the temperature dependency of the different thermal-hydraulic-mechanical-chemical/biological (THMC/B) processes according to available features-events-processes (FEP) catalogues for rock salt, clay stone, and crystalline rock and describes ways to defining host rock specific maximum temperatures based on specific disposal and safety concepts. Safety oriented weighting of different criteria and comparison of different potential regions and sites are key challenges during the siting process. The project MABeSt studied and reviewed methodological approaches to this weighting and comparison problem with special emphasis on multi criteria analysis (MCA) and multi criteria decision analysis (MCDA). A key requirement for safe geological disposal of nuclear waste is barrier integrity. The project PeTroS performed the first triaxial flow-through experiments on natural rock salt samples at disposal relevant p−T conditions and studied potential percolation mechanisms of fluids within rock salt. The data substantiate that the minimum stress criterion and/or the dilatancy criterion are the prime “percolation thresholds” in rock salt. The research results support BASE in fulfilling its tasks as national regulator according to state-of-the-art science and technology and are also relevant to other stakeholders of the siting process.


2021 ◽  
Vol 11 (13) ◽  
pp. 5879
Author(s):  
Suu-Yan Liang ◽  
Wen-Sheng Lin ◽  
Chan-Po Chen ◽  
Chen-Wuing Liu ◽  
Chihhao Fan

Radionuclides are inorganic substances, and the solubility of inorganic substances is a major factor affecting the disposal of radioactive waste and the release of concentrations of radionuclides. The degree of solubility determines whether a nuclide source migrates to the far field of a radioactive waste disposal site. Therefore, the most effective method for retarding radionuclide migration is to reduce the radionuclide solubility in the aqueous geochemical environment of subsurface systems. In order to assess the performance of disposal facilities, thermodynamic data regarding nuclides in water–rock systems and minerals in geochemical environments are required; the results obtained from the analysis of these data can provide a strong scientific basis for maintaining safety performance to support nuclear waste management. The pH, Eh and time ranges in the environments of disposal sites cannot be controlled, in contrast to those under experimental conditions in laboratories. Using a hypothetical error mechanism for the safety assessment of disposal sites may engender incorrect assessment results. Studies have focused on radionuclide reactions in waste disposal, and have offered evidence suggesting that these reactions are mainly affected by the geochemical environment. However, studies have not examined the thermodynamics of chemical reactions or interactions between water and minerals, such as the surface complexation and adsorption of various nuclide-ion species. Simple coefficient models have usually been applied in order to obtain empirical formulas for deriving Kd to describe nuclide distributions in the solid or liquid phase in water–rock geochemical systems. Accordingly, this study reviewed previous research on the applications of geochemical models, including studies on the development of geochemical models, sources of thermodynamic databases (TDBs) and their applications in programs, the determination of the adequacy of TDBs in surface complexation models and case studies, and the selection and application of activity coefficient equations in geochemical models. In addition, the study conducted case studies and comparisons of the activity coefficients derived by different geochemical models. Three activity coefficient equations, namely the Davies, modified Debye–Hückel, and Pitzer equations, and four geochemical models, namely PHREEQC, MINEQL+, MINTEQA2, and EQ3/6, were used in the study. The results demonstrated that when the solution’s ionic strength was <0.5 m, the differences in the activity coefficients between the Davies and modified Debye–Hückel equations were <5%. The difference between the Pitzer and Davies equations, or between the Pitzer and modified Debye–Hückel equations in terms of the calculated activity coefficients was <8%. The effect of temperature on the activity coefficient slightly influenced the modeling outputs of the Davies and modified Debye–Hückel equations. In the future, the probability distribution and uncertainty of parameters of Kd and the equilibrium constant can be used in geochemical and reactive transport models to simulate the long-term safety of nuclear waste disposal sites. The findings of this study can provide a strong scientific basis for conducting safety assessments of nuclear waste disposal repositories and developing environmental management or remediation schemes to control sites marred by near-surface contamination.


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