Michael LersowDr.-Ing. Michael Lersow · Geotechnical processes
Michael Lersow
Dr.-Ing. (Ph.D.)
About
52
Publications
117,427
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59
Citations
Citations since 2017
Introduction
Tailings storage facilities, Geotechnical environmental structures, Radíoactive waste and residues
Additional affiliations
January 2012 - present
Dr.-Ing. Michael Lersow
Position
- Managing Director
January 2009 - December 2011
Federal Office for Radiation Protection/Bundesamt für Strahlenschutz, BfS
Position
- Scientific Assistant
Description
- Planning and construction of repositories
May 1995 - June 2008
Wismut GmbH, BUL Sachsen GmbH, BUL Brandenburg GmbH
Position
- Technical Director (CEO) among others
Description
- Remediation of lignite mining areas in Lusatia and Mitteldeutschland Remediation of uranuim mining areas in Saxony and Thuringia
Education
February 1977 - June 1984
September 1971 - August 1976
Publications
Publications (52)
Im Beitrag wird dargestellt, wo radioaktive Abfälle und Rückstände anfallen, wie diese klassifiziert werden, welche Vorschriften und Regeln bei der Entsorgung einzuhalten sind und welche geotechnischen Umweltbauwerke (Endlager) sich eignen, diese Materialien langzeitsicher zu verwahren. Primäres Schutzziel der Endlagerung ist, “dass Übertritte von...
Deposition of ore mill tailings in in-pond tailings storages exists in different parts of the world and in different climate zones. Tailings ponds are built, in particular for gold, copper, zinc, lead and uranium mill tailings and so on, with huge dimensions. It is the mostly used method of the world to deposit mill tailings. Especially the closure...
Like every other company, the mining company needs reliable basics before the start of its project. Because wrong decisions at this planning step and -phase have long-term effects and can only be corrected with considerable effort. The open cast lakes in the rhenish lignite mining area are clearly larger and deeper than the comparable open cast lak...
Energy source Uranium - resources, production and range from viewpoint technological development.
A sound assessment of the future available uranium resources and connected strategic ranges must be considered trends in the exploration, the level of technological development of different stages of the nuclear fuel cycle (starting with mining and p...
Contribution to the calculation of the gas pressure load of aquifer storages
For the safe operation of underground storage facilities, it is necessary to know the allowable storage pressure. Subject of this work are statements to this problem based on FEM calculations assuming of a simple elastic-ideal plastic material model. It examines gas pressu...
Der Beitrag erhebt keinen Anspruch auf Vollständigkeit. Eine umfangreichere Darlegung des Autors dazu findet sich in: https://www.iablis.de/iablis/themen/2020-schach-dem-wissen/forum-2020/648-das-standortsuchverfahren-fuer-ein-endlager-fuer-waerme-entwickelnden-radioaktiven-abfall-partizipativ,-wissenschaftsbasiert, transparent-oder-doch-zu-hinterf...
Abstract
When the Federal Agency for Final Storage (BGE) submitted the first partial report on the search for a site for a final storage facility (repository) for HAW (High Active Waste) to the Federal Office for the Safety of Nuclear Waste Disposal (BASE) on September 28, 2020, doing stir clearly contradiction in many parts of the Federal Republic...
This book describes repository solutions for all types of radioactive waste and residues in different geotechnical repository structures. The focus is initially on existing or planned final disposal sites in Germany and the process of finding sites. However, international comparisons are drawn, especially to locations in the US. This affects both t...
The task and goal of final disposal is to simultaneously safeguard radioactive material subject to supervision in a Geotechnical Environmental Structure and permanently prevent the dispersion of any radionuclides released from the repository into the biosphere.
Currently, public discussion on the disposal of radioactive substances in Germany and in other parts of the world is focused on the search for a suitable location for the repository for heat-generating radioactive (highly radioactive) waste.
Abstract
This book describes repository solutions for all types of radioactive waste and residues in different geotechnical repository structures. The focus is initially on existing or planned final disposal sites in Germany and the process of finding sites. However, international comparisons are drawn, especially to locations in the US. This affec...
The International Atomic Energy Agency (IAEA) has recognized Very Low Level Waste (VLLW) as a category that provides both practical and economic benefits, see [1]. The criteria for national and international low active and very low radioactive (LLW) disposal classifications are described in the EPRI Final Report [2]. This report provides the techni...
The following sections are consistent with the classification of radioactive waste previously set out in Chap. 2, Fig. 2.1 and also with the situation in Germany. The reader will notice that there are relatively large differences between individual countries in the long-term safe and long-term safekeeping of this class of radioactive waste. Compari...
The following explanations relate to processing residues and their storage in various locations (tailings ponds) as a result of SDAG Wismut’s uranium mining operations in Saxony and Thuringia. These are possibly the largest uranium mill tailings ponds in the world, so that they can be described as reference objects. Comparisons are made with remedi...
The radioactive wastes with high radioactivity (HAW) are those which are relatively low in volume worldwide, but represent over 90% of the total radioactivity held in wastes. The decay of radionuclides produces significant quantities of heat, which makes direct transport into a safe deposit impossible.
Environmental monitoring is an integral part of the repository concept for all geotechnical environmental structures used for the final disposal of radioactive residues and waste. In this context, reference can be made to the explanations given in Chap. 5, where such environmental monitoring has been presented for the safe long-term storage of uran...
In some countries the time for undertaking a long-term safety assessment for a repository for high-level radioactive waste is set down in law.
In the preceding chapters, the author has attempted to discuss the various problems arising from the need to dispose of respective classes of radioactive waste and residues and consequently the associated geotechnical environmental structures - repository structures - without able to fulfil a necessary licensing practice. This task initially requir...
https://www.springer.com/de/book/9783030329099?gclid=Cj0KCQjwrMHsBRCIARIsAFgSeI2XOUhrEJgSZ26ykHVZbStOveAyS9na9SghpsQcGEloDiClJUzXoncaApu7EALw_wcB
https://www.springer.com/de/book/9783662578216?utm_medium=display&utm_source=criteo&utm_campaign=3_nsn6445_product&utm_content=de_banner_07132017#otherversion=9783662578223 ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------...
Radioaktive Rückstände sind Materialien, die in industriellen und bergbaulichen Prozessen anfallen, und die in der StrlSchV in Anlage XII Teil A genannt werden, sowie Materialien, die die in der StrlSchV in Anlage XII Teil A genannten Voraussetzungen erfüllen. Deren Verwertung oder Beseitigung wird im Teil 3 der Strahlenschutzverordnung (StrlSchV)...
In diesem Kapitel wird neben der Beschreibung der radioaktiven Inventare auf die vorhandenen Endlagerlösungen für hochradioaktive Abfälle eingegangen. Nach Angaben der World Nuclear Association (WNA) entstehen weltweit Jahr für Jahr 12.000 Tonnen hochradioaktiver Abfälle. Zu den hochradioaktiven Abfällen in Deutschland zählen in erster Linie Brenne...
Nach vorliegender Klassifikation, siehe Kap. 2, werden schwach radioaktive Abfälle (Low Active Waste – LAW) durch eine Aktivität A* < 1 E+11 Bq/m³ und einer mittleren Zerfallswärme Qmittel ≅ 200 W/m³ und mittelradioaktive Abfälle (Medium Active Waste – MAW) durch eine Aktivität A* = (1 E+10 bis 1 E+15) Bq/m³ und Zerfallswärme Q < 2 kW/m³ gekennzeic...
Das Umwelt‐Monitoring ist für alle für die Endlagerung radioaktiver Rückstände und Abfälle zur Anwendung kommenden Geotechnischen Umweltbauwerke integraler Bestandteil eines Endlagerkonzeptes. Dabei kann auf die Ausführungen von Kap. 5 verwiesen werden, in welchem ein solches für die langzeitsichere Verwahrung von Uran‐Tailings ponds vorgestellt is...
Derzeit fokussiert sich die öffentliche Diskussion im Zusammenhang mit der Entsorgung radioaktiver Stoffe vor allem auf die Standortsuche für ein Endlager für wärmeentwickelnde radioaktive (hochradioaktive) Abfälle. Um die notwendige Diskussion technisch‐naturwissenschaftlicher Aspekte bei der langzeitstabilen, langzeitsicheren Verwahrung von Abfäl...
In den vorangegangenen Kapiteln wurden verschiedene Geotechnische Umweltbauwerke vorgestellt, die definierte radioaktive Inventare dauerhaft sicher aufnehmen oder aufnehmen sollen, und welchen Nachweis es dazu gibt, dies glaubhaft zu belegen und auf dessen Grundlage die Geotechnischen Umweltbauwerke zugelassen und genehmigt werden. Für Tailings pon...
ohne Freigabe – institutionelle Überwachung der Abfälle ist notwendig
Die Aufgabe und gleichzeitig das Ziel der Endlagerung überwachungspflichtigen radioaktiven Materials in einem Geotechnischen Umweltbauwerk ist es, den Übertritt sowie die Ausbreitung von Radionukliden aus dem Inventar des Endlagers in der Biosphäre dauerhaft zu verhindern. Das heißt, das Geotechnische Umweltbauwerk und die Einlagerung des radioakti...
In den vorangegangenen Kapiteln ist der Versuch unternommen worden, die Problemstellungen der Endlagerung von radioaktiven Rückständen und Abfällen in unterschiedlichen Geotechnischen Umweltbauwerken (Endlagerbauwerken) mit notwendigem Tiefgang zu erörtern, ohne den Anspruch zu erheben, einer Genehmigungspraxis zu genügend. Dem Autor ging es auch d...
A holistic view on the availability of the energy source uranium should include – in addition to the resources which are far from fully known – the different factors of the energy yield in nuclear reactors, taking into account future technological possibilities. A static viewpoint based on currently secured resource data and today’s uranium consump...
Der Bergbautreibende benötigt wie jedes andere Unternehmen vor Beginn seines Vorhabens möglichst verlässliche Grundlagen, denn falsche Entscheidungen in dieser Planungsstufe und -phase haben langfristige Auswirkungen und lassen sich nur mit erheblichem Aufwand korrigieren.
Die TRS im Rheinischen Braunkohlenrevier sind deutlich größer und tiefer als...
Abstract
Residues from the processing of ores in many mining countries with different climate zones are deposited on the surface storage facilities . These are created as sluicing dumps with residue ponds (Tailings Ponds).
Examples of such facilities can be found in the processing of bauxite, gold, copper, zinc, lead and uranium ores. But also blas...
Safe and long term stable closure of tailings ponds, epsecially from the uranium ore processing
The secure, long term stable closure of tailings ponds from the uranium ore processing is a major environmental-geotechnical challenge. In selecting closure methods is crucial that the arising environmental geotechnical-construction the hazards, which of...
The reclamation of abandoned (or orphaned) mine sites requires a sustainable design accommodating the ecological and economical conditions, the possible course of construction works and the planned follow-up utilization. In the last two decades geosynthetics have been playing a substantial role by meeting high technical requirements and thus allowi...
Since 1991 the state-owned company Wismut GmbH has been redeveloping the legacies of the 40 years or uranium ore mining in Saxony and Thuringia. The Federal government included 13 bn DM (about 6.3 bn EUR) in the Federal budget for this major environmental protection project in 1991. The balance-sheet of the orevious shutdown and redevelooment activ...
Closure of Wismut Tailings Ponds and decontamination of surface water, pore water and seepage
The storage facilities (tailings ponds) for tailings from uranium ore processing of the SDAG Wismut be all closed with the method of dry in situ remediation with partial dewatering. The tailings body on the air side will be encapsulated by a multifunctiona...
Joint Convention on the Safety of Spent Fuel Management and on the Safety of Radioactive Waste Management
The Joint Convention was adopted on 5 September 1997 at a Diplomatic Conference convened by the IAEA at its headquarters from 1-5 September 1997. It was opened for signature at the IAEA General Conference on 29 September 1997. Pursuant to Artic...
Modular concept of technical solutions for the improvement of the water quality of acid mine water from former open pits
With the decline of the brown coal production in the Lusatian-area in 1990 the dewatering was reduced too. This caused problems with the water balance in the influenced area, and environmental friendly and economic solutions have...
With requirements on the soundings and on the distribution of the locations of the soundings the key foundations are defines sufficiently, in order to an exhaustive proof of the soil mechanical behavior of loose rock carry out. Because of the complexity of the mechanical behavior of loose rock it is necessary the results from different test methods...
Summary
This presentation tries some special achievements and developments in the remediation mining and its transfer to general tasks in heavy construction, special heavy construction and hydraulics construction to show. The company BUL Sachsen GmbH has a whole series of process developments presented. Is particularly emphasized the vibratory inje...
For the stabilization of dumps with the construction of hidden dams and for building ground improvement, for instance for traffic lines over dumps, nearly all applied compaction methods have the aim to reduce the pore volume in the loose rock. With these methods, a homogenization of the compacted loose rock will be obtained too. The compaction meth...
The Lusatian and Central German Mining Administration Company (LMBV), state branch Eastsaxony, was responsible for the task of ensuring, on the basis of mining operations plan procedure remediation of the plant site of the briquetting plant / power plant "Laubusch", in accordance with legal requirements and authorithy requirements. As focus of cont...
Construction of Traffic Lines on Dumps of Formerly Surface Mining
Brown coal mining in the Lausitz area (Lusatia area) and in the Mitteldeutschland area (central Germany) has influenced the natural grown landscape. For further use of abandoned mining areas includes also the construction of traffic lines across surface mining dumps. Beside a large a...
Method to determine shear strength parameters of loose rock and dump material from plate-loading tests on bottom of borehole, on basis of plasticity theory
The necessary test equipment and a method of determining the stress-strain behavior, the moduli of deformation and the shear strain parameters are available for the plate-loading test on the bot...
Brown coal mining in the Lausitz area (Lusatia area) and in the Mitteldeutschland area (central Germany) has influenced the natural grown landscape. The further use of abandoned mining areas includes the construction of traffic lines over surface mining dumps. Beside a large amount of earthmoving, several foundation ground improvements (deep soil c...
Plate-loading tests on bottom of borehole – method to determine of stress-strain behavior of loose rock and dump material
The necessary test equipment and a method of determining the stress-strain behavior, the moduli of deformation and the shear strength parameters are available for the plate-loading test on the bottom of the borehole. The authors...
Deep soil compaction for ground improvement and to stabilization of dumps and slopes with danger of liquefaction, determination of deformation modulus and shear strength parameters of loose rock
Hidden dams and ground improvement be used for stabilization of dumps and as requirement for construction of traffic lines across dump areas. These compac...
The static calculation of waterproofing of cross sections, which are built as impermeable barriers of potential underground flow spaces for very long service life, can be carried out with FE-program systems. The real behavior of abutment material and rock will be considered through the use of programs for linear elastic, elasto-viscous (time-depend...
Elasto-plastic stress-strain approach by using the yield condition from DRUCKER and PRAGER for the calculation of thick-walled tubes
Wherever highly stressed structures are present these must be assessed with regard to stress, operability and economy of material, it is not illegal to deny the inelastic material behavior and the calculation perform...
Elasto-plastic stress-strain approach by using the yield condition from DRUCKER/PRAGER for the calculation of thick-walled circular-cylindrical facings
For realistic assessment of the bearing capability of highly stressed concrete shaft-facings the use of a elastoplastic material approach is appropriate because the assessment by the theory of elas...
Questions
Questions (6)
Projects
Projects (3)
“The United Nations (U.N.) announced that drought is at risk of becoming ‘the next pandemic’ if urgent action isn’t taken to tackle climate change through water and land management,” The Hill reported. “About 1.5 billion people have suffered from the effects of droughts this century, with the land devastation, food insecurity and other subsequent factors leading to economic costs of an estimated $124 billion.”
“About 130 countries could face a greater risk of drought this century under a high-emissions scenario cited by the U.N.,” Reuters reported. “Another 23 countries will confront water shortages because of population growth, with 38 nations affected by both, it said. Drought — like a virus — tends to last a long time, have a wide geographic reach and cause knock-on damage.”
This project aims to:
- Contribute to achieving the sixth goal of sustainable development (ensure access to water and sanitation).
- Contribute to achieving international water security.
- Raising the awareness of decision-makers and the international civil society, Actors in the social and economic environment, about the risks of drought, through prospective studies.
- Sensitizing decision-makers and the international civil society about ways to conserve blue gold.
- Contribute to finding possible and alternative solutions to face drought.
- How to cope with the next epidemic (drought).
“Long term safe disposal of every kind of radioactive waste and residues in different geotechnical environmental structures"
