- What are electromagnetic fields?
- Static and low-frequency fields
- What are static and low-frequency fields?
- Direct and alternating voltage
- Effects of static and low-frequency fields
- Reports & Evaluations
- Radiation protection relating to the expansion of the national grid
- Basics transfer of electrical power
- High-frequency fields
- What are high-frequency fields?
- Applications high-frequency fields
- Radiation protection in mobile communication
- What is mobile communication?
- Reports and evaluations
- What is optical radiation?
- UV radiation
- What is UV radiation?
- Sun but safe!
- Effects of UV radiation
- Protection against UV radiation
- UV index
- Infrared radiation
- What is ionising radiation?
- Radioactivity in the environment
- Where does radioactivity occur in the environment?
- What is the level of natural radiation exposure in Germany?
- Air, soil and water
- Building materials
- Industrial residues (NORM)
- BfS laboratories
- Applications in medicine
- Applications in daily life and in technology
- Radioactive radiation sources in Germany
- Register high-level radioactive radiation sources
- Type approval procedure pursuant to RöV and StrlSchV
- Cabin luggage security checks
- Radioactive materials in watches
- Ionisation smoke detectors (ISM)
- What are the effects of radiation?
- Acute radiation damage
- Effects of selected radioactive materials
- Consequences of a radiation accident
- Cancer and leukaemia
- Genetic radiation effects
- Individual radiosensitivity
- Epidemiology of radiation-induced diseases
- Ionising radiation: positive effects?
- Risk estimation and assessment
- Radiation protection
- Basic informations
- Occupational radiation protection
- Nuclear accident management
- What happens in an emergency?
- Federal and state tasks
- In the event of an emergency
- Measuring networks
- Exercises for emergency situations
- Nuclear accidents
- Defence against nuclear hazards
- Service offers
- Radon measurements
- Incorporation monitoring
- Biological dosimetry
- About us
- Science and research
- Research concept
- Scientific collaborations
- EU research framework programme
- BfS research programme
- Third-party funded research
- Departmental research
- Selected research projects
- Selected research results
- Professional opinions
- Laws and regulations
- BfS Topics in the Bundestag
Mining relics with enhanced natural radioactivity
- Relics from mining and ore processing may contain natural radioactive particles and may have adverse effects on man and environment when they are released.
- In Saxony, Thuringia and Saxony-Anhalt, this concerns the relics of mining in the Middle Ages and, in particular, of uranium mining.
- Mining relics were examined in a large project and the resulting environmental radioactivity were assessed.
Since most of the ores exploited presented a strong uranium mineralisation, mining residues (waste rock pile material) and in particular residues from treatment (for example tailings, slags) contain amounts of radionuclides from the uranium radium decay chain which make it necessary to consider these residues from the radiation protection point of view.
External and internal radiation exposure
The following exposure paths are most likely to cause a radiation exposure to the population in mining areas:
- the external radiation exposure due to gamma radiation occurring on surfaces influenced by mining activities (material deposits) or in the immediate vicinity of mining facilities (waste rock piles et cetera) and
the internal radiation exposure due to
- ingestion of drinking water and of agricultural or horticultural products and mushrooms,
- ingestion of contaminated dust and soil by children playing,
- inhalation of contaminated dust and
- inhalation of radon.
The radiation exposure of the population is particularly influenced by the fact that mining residues and ore processing residues (for example waste rock pile material, slags) have frequently been used for landfills and road construction, and even for house building.
Due to the geological conditions the largest part of the mining relics with enhanced natural radioactivity is found in
- Saxony-Anhalt and
where silver, tin, copper and other metal mining activities have been an important economic factor since the Middle Ages. After the Second World War, uranium mining was started, with the SAG/SDAG (Sowjetische Aktiengesellschaft/Sowjetisch-Deutsche Aktiengesellschaft) Wismut being, for a certain period of time, the world’s third biggest uranium producer.
Register of Relics
In fulfilment of its legal task of determining the environmental radioactivity occurring due to mining activities in the presence of natural radioactivity in the Eastern part of Germany, the Federal Office for Radiation Protection (BfS) has performed the Project "Radiological registration, examination and evaluation of mining relics (Register of Relics)".
As shown in the table below, this project has come to the following results: In the Laender of Saxony, Saxony-Anhalt and Thuringia a total of approximately
- 20 million cubic metres of slacks,
- 130 million cubic metres of waste rock pile material and
- 30 million cubic metres of processing residues
were deposited on relics which have to be categorised as "radiologically relevant".
|Parameter||Class A "radiologically irrelevant" and "unrestricted use"||Class A "radiologically irrelevant" and "further observance"||Class B "radiolologically relevant"|
|Amount of residures||437||2553||820|
|Surface (in hectares)||289||255||2280|
|Volume (in cubic metres)||24||5.7||184|
However, identifying the radiologically relevant areas and relics does not necessarily mean that a decision is made about the need for remediation measures since these decisions can only be made after a particular case and site have been examined.
Examinations of a similar quality have not been undertaken for the Western part of Germany. Representative investigations which could be used for an evaluation of the radiological importance of mining relics only exist for Bavaria, Baden-Württemberg and Lower Saxony. BfS estimations have shown that approximately only 1 million cubic metres of radiologically relevant mining residues are stored in the Western part of Germany. Some of these relics have already been examined and partly remediated.
State of 2017.07.20