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UID:123763-1781528400-1781533800@euradschool.eu
SUMMARY:InCoManD webinars on microbial activity | Characterization of Complex/Coupled Biogeochemical Processes at the Metal Canister/Bentonite/Radionuclide Interface in Deep Geological repositories
DESCRIPTION:This talk will examine the role of microorganisms in deep geological repositories (DGRs) for nuclear waste. We will explore who these microbes are\, how they survive in extreme environments\, and how their activity affects the safety of the repository over thousands of years. \n\nMicrobial Diversity: the key groups of bacteria\, fungi\, and archaea found in engineered barriers (like bentonite clay) and the surrounding host rock will be identified.\nEnvironmental Limits Microbial survival is restricted by the harsh conditions inside a repository. We will discuss how high temperatures\, radiation\, high clay density\, and changes in water and oxygen levels control whether microbes stay dormant or become active.\nImpact on Repository Safety Microbial activity can change how well the barrier system works. Key topics include:\n\n\nCorrosion: Bacteria causing metal waste containers to rust or degrade.\nGas: Microbes producing gases that could increase internal pressure.\nClay Changes: Biological processes altering the protective properties of bentonite.\nRadionuclide mobility: How microbes can either “trap” radioactive elements (like uranium) through biomineralization or help them move through the environment.\n\n\nFuture Challenges: Finally\, we will highlight the need for more long-term experiments in underground labs to help us better predict how biology will interact with nuclear waste barriers over geological timescales.\n\n  \nLearning Outcomes \nUpon completion of this session\, participants should be able to: \nKnowledge \n-Evaluate how physicochemical stressors—such as radiation\, thermal loads\, high bentonite density\, and shifting redox potentials—limit or stimulate microbial activity \n-Analyze the dual role of microbes in repository performance\, specifically their ability to drive Microbiologically Influenced Corrosion (MIC) versus their capacity for radionuclide immobilization through biomineralization \n-Recognize current knowledge gaps in the “Safety Case” for deep geological repositories and prioritize future research needs for robust long-term modelling. \nSkills \n– Competence in determining the “limits of life” based on physical and chemical constraints. \n-Ability to evaluate the coupled interactions between microbial metabolism and mineralogical changes \n– Proficiency in identifying microbial risks (corrosion\, gas buildup) versus biological benefits (immobilization) within a repository’s safety framework \nRecording
URL:https://euradschool.eu/event/incomand-webinars-on-microbial-activity-characterization-of-complex-coupled-biogeochemical-processes-at-the-metal-canister-bentonite-radionuclide-interface-in-deep-geological-repositories/
LOCATION:Online
CATEGORIES:EURAD webinar
ORGANIZER;CN="EURAD KM":MAILTO:euradmobility@sckcen.be
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DTSTART;TZID=Europe/Brussels:20260618T130000
DTEND;TZID=Europe/Brussels:20260618T140000
DTSTAMP:20260619T080907Z
CREATED:20260619T080828Z
LAST-MODIFIED:20260619T080907Z
UID:123785-1781787600-1781791200@euradschool.eu
SUMMARY:Lunch & Learn | Polish Radioactive Waste Management Plant R&D Program
DESCRIPTION:About\nThe presentation outlines the strategic role and planned research and development (R&D) program of the Radioactive Waste Management Plant (ZUOP)\, which is the sole operator of radioactive waste disposal facilities in Poland and is responsible for the management of radioactive waste and spent nuclear fuel. The program is closely aligned with the national policy framework and addresses key challenges related to the safe operation\, closure\, and future expansion of waste management infrastructure\, including the existing repository in Różan and the planned development of new near-surface and deep geological repositories.\nThe R&D activities are focused on ensuring the long-term safety and effectiveness of radioactive waste management systems across their entire lifecycle. A significant component concerns the continued safe operation and eventual closure of the existing repository\, including the assessment of engineered barriers\, investigation of material ageing processes\, and analysis of radionuclide migration in the environment. In parallel\, the program addresses the complex task of retrieving and managing historical waste stored at the site\, with emphasis on safety\, waste characterisation\, and evaluation of suitable processing and disposal pathways.\nA major priority is the development of a new near-surface repository\, which requires comprehensive site selection studies\, including geological\, hydrogeological\, and environmental analyses\, as well as the design of engineered barrier systems and repository structures. The program also includes the formulation of waste acceptance criteria and the development of monitoring systems to ensure safety during operation and after closure. Research on multibarrier systems plays a key role\, focusing on the selection and testing of materials\, modelling of radionuclide transport\, and the design of safe waste packages and containers.\nIn addition\, the program supports the development of advanced methods for waste treatment and conditioning\, including mechanical\, chemical\, and thermal processing\, as well as immobilization techniques based on cementitious and geopolymer matrices. These efforts aim to address both existing waste streams and future waste arising from nuclear power plants\, including more complex and organic waste forms.\nLong-term objectives of the program include the establishment of a deep geological repository for high-level radioactive waste and spent nuclear fuel\, supported by the creation of a Polish Underground Research Laboratory (PURL). The research conducted within the program is intended to provide the scientific and technical basis for the safe design and implementation of such facilities in the future.\nOverall\, the ZUOP R&D program represents a comprehensive and integrated approach to radioactive waste management\, combining infrastructure development\, technological innovation\, safety assessment\, and long-term planning to ensure compliance with regulatory requirements and support the sustainable development of nuclear energy in Poland. \nSpeaker: Urszula Brykala \nRecording\n \n 
URL:https://euradschool.eu/event/lunch-learn-polish-radioactive-waste-management-plant-rd-program/
LOCATION:Online
CATEGORIES:EURAD webinar
ORGANIZER;CN="EURAD KM":MAILTO:euradmobility@sckcen.be
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