Jörg DehnertSaxon State Office for Environment, Agriculture and Geology · Climate, Air, Noise, Radiation
Jörg Dehnert
Dr.
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303
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Publications (122)
Radon-222 contributes to half of the natural radiation exposure of humans and is one of the main causes of lung cancer. Of particular importance for humans is the exposure to radon-222 indoors, which enters living and working areas from the soil air, e.g. through cracks in the foundations of buildings. An easy and efficient way to minimise indoor r...
Large parts of the new Radiation Protection Act came into effect on December 31, 2018. For the first time, a reference radon activity concentration of 300 Bq/m3 has been established as an annual average for indoor workplaces. In addition, there are obligations and a timetable for those responsible for workplaces located in radon prevention areas. I...
Am 31.12.2018 traten große Teile des neuen Strahlenschutzgesetzes in Kraft. Es wurde erstmals ein Referenzwert für die Radonaktivitätskonzentration von 300 Bq/m3 im Jahresmittel für Arbeitsplätze in Innenräumen festgelegt. Hinzu kommen Pflichten und ein Zeitplan für die Verantwortlichen von Arbeitsplätzen, die in Radonvorsorgegebieten liegen. In Sa...
The new German Radiation Protection Act (StrlSchG) of December 31, 2018 established a reference value of 300 Bq/m3 for the annual average radon activity concentration in buildings with recreation and living rooms as well as workplaces. It is expected that the reference value will be exceeded in a vast number of buildings throughout Germany and that...
The new German Radiation Protection Act (StrlSchG) of 31 December 2018 established a reference value of 300 Bq/m3 for the annual average radon activity concentration in buildings with recreation and living rooms as well as workplaces. It is expected that the reference value will be exceeded in a vast number of buildings throughout Germany and that...
A new Quick-Erect Stopping System (QESS) for miners was developed to reduce the radon exposures of miners are employed in remediation work at old mining sites in Germany (Dehnert 2020).
The QESS is a light-weight, modular, and reusable construction kit consisting of interlocking telescopic aluminum tubes, radon-proof foil, and expanding foam to shu...
A new Quick-Erect Stopping System (QESS) for miners was developed to reduce the radon exposures of miners are employed in remediation work at old mining sites in Germany. The QESS is a lightweight , modular, and reusable construction kit consisting of interlocking telescopic aluminum tubes, radon-proof foil, and expanding foam to shut off radon-ric...
The Quick-Erect Stopping System (QESS) offers a new way of reducing the radon exposure of miners in Germany, especially during remediation work in old mines. The QESS is a lightweight, modular and reusable construction kit of interlocking
telescopic aluminum tubes, radon-proof foil and expanding foam. It is designed to seal off radon-rich parts of...
The Quick-Erect Stopping System (QESS) offers a new way of reducing the radon exposures of miners in Germany, especially during remediation work in old mines. The QESS is a light-weight, modular, and reusable construction kit of interlocking telescopic aluminum tubes, radon-proof foil, and expanding foam. It is designed to seal off radon-rich parts...
In 1168, the first silver was found in the Saxon Erzgebirge. Mining began shortly thereafter and continues to this day at varying intensities. About 250 miners are permanently engaged in rehabilitation work at old mining sites so that houses and roads are safe and the mine water can drain through galleries. The radon potential in the Erzgebirge is...
The Ore Mountains (Erzgebirge) and Vogtland are low-mountain regions in the East German state of Saxony. Here, silver deposits were found in 1168. Mining began shortly after, continues at varying intensity to this day, and has left numerous galleries and shafts. Today, eight companies with about 250 miners carry out maintenance at more than 40 smal...
The Saxon low mountain ranges have a high radon potential. An important pillar of underground radiation protection is official radon personal dosimetry. Miners in active mining, during rehabilitation work at old mining sites and during Wismut remediation are monitored with official radon personal dosimetry. Radon personal dosimetry is also open to...
The Saxon low mountain ranges have a high radon potential. An important pillar of underground radiation protection is official radon personal dosimetry. Miners in active mining, during rehabilitation work at old mining sites and during Wismut remediation are monitored with official radon personal dosimetry. Radon personal dosimetry is also open to...
The new Radiation Protection Act (StrlSchG) of 31 December 2018 established a reference value of 300 Bq/m3 for the annual average radon activity concentration in buildings with recreation and living rooms and workplaces. It is expected that the reference value will be exceeded in a large number of buildings throughout Germany and that radon protect...
The new Radiation Protection Act (StrlSchG) of 31 December 2018 established a reference value of 300 Bq/m3 for the annual average radon activity concentration in buildings with recreation and living rooms and workplaces. It is expected that the reference value will be exceeded in a large number of buildings throughout Germany and that radon protect...
A new Quick-Erect Stopping System (QESS) for miners was developed to reduce the radon exposures of miners at small construction sites of old mining in Germany. The QESS is a lightweight, modular, and reusable construction kit of interlocking telescopic aluminum tubes, plastic foils, and expanding foam to shut off radon rich parts of galleries in on...
A new Quick-Erect Stopping System (QESS) for miners was developed to reduce the radon exposures of miners at small construction sites of old mining in Germany. The QESS is a lightweight, modular, and reusable construction kit of interlocking telescopic aluminum tubes, plastic foils, and expanding foam to shut off radon rich parts of galleries in on...
Radiation protection law in Germany changes on December 31, 2018, when large parts of the new Radiation Protection Act will enter into force. At the same time, the Radiation Protection Ordinance will be adapted to the new law. Two GDR regulations on radiation protection in mining continued to apply in the new federal states and are now being repeal...
Radiation protection on construction sites of old mining is demanding because of the high radon potential of the mines, natural density driven mine air current through the galleries and the ramifications of galleries. Monitoring of the underground workplaces consist of the two pillar "operational radon measurements" and "personal dosimetry". Howeve...
Radiation protection law in Germany changes on December 31, 2018, when large parts of the new Radiation Protection Act will enter into force. At the same time, the Radiation Protection Ordinance will be adapted to the new law. Two GDR regulations on radiation protection in mining continued to apply in the new federal states and are now being repeal...
Radiation protection on construction sites of old mining is demanding because of the high radon potential of the mines, natural density driven mine air current through the galleries and the ramifications of galleries. Monitoring of the underground workplaces consist of the two pillar "operational radon measurements" and "personal dosimetry". Howeve...
The number of monitored persons at radon exposed workplaces has risen to 292 in Saxony in 2016. As a result, the radiation protection authority had to deal with user criticism of personal dosimetry during supervisions. The fixed reference dosimeters for the personal radon dosimetry in coops and site caravans disrupt the organization at work. In add...
On average, about 270 miners of eight enterprises work in the old mining of the Saxon low mountain ranges Ore Mountains and Vogtland. They carry out the elimination of mining damages, potential hazards and maintenance of drainage systems. Radiation protection on construction sites of old mining is demanding because of the high radon potential of th...
On average, about 270 miners of eight enterprises work in the old mining of the Saxon low mountain ranges Ore Mountains and Vogtland. They carry out the elimination of mining damages, potential hazards and maintenance of drainage systems. Radiation protection on construction sites of old mining is demanding because of the high radon potential of th...
The number of monitored persons at radon exposed workplaces has risen to 292 in Saxony in 2016. As a result, the radiation protection authority had to deal with user criticism of personal dosimetry during supervisions. The fixed reference dosimeters for the personal radon dosimetry in coops and site caravans disrupt the organization at work. In add...
The visitor mine Frisch Glück ”Glöckl” Johanngeorgenstadt is artificially ventilated by a mine fan. The effective dose of a mountain guide was 14.6 mSv per year. The ventilation was then changed by opening and closing mine doors. The effective dose of the mountain guide was cut in half to 4.8 mSv per year. A mine air experiment was carried out for...
On average, about 270 miners of eight enterprises work on the elimination of mining damages, potential hazards and maintenance of drainage systems in Saxony. Radiation protection on construction sites of old mining is demanding because of the high radon potential of the mines, natural density driven mine air current through the galleries and the ra...
40 of 62 visitor mines, caves and mined cavities have been supervised by the radiation protection authority in Saxony in recent years. Supervision usually includes continuous measurements of radon activity concentrations, time-solved by one minute using an AlphaGUARD PQ 2000PRO. Some of the visitor mines implemented a good radiation protection for...
On average, about 270 miners of eight enterprises work on the elimination of mining damages, potential hazards and maintenance of drainage systems in Saxony. Radiation protection on construction sites of old mining is demanding because of the high radon potential of the mines, natural density driven mine air current through the galleries and the ra...
40 of 62 visitor mines, caves and mined cavities have been supervised by the radiation protection authority in Saxony in recent years. Supervision usually includes continuous measurements of radon activity concentrations, time-solved by one minute using an AlphaGUARD PQ 2000PRO. Some of the visitor mines implemented a good radiation protection for...
The visitor mine Frisch Glück "Glöckl" Johanngeorgenstadt is artificially ventilated by a mine fan. The effective dose of a mountain guide was 14.6 mSv per year. The ventilation was then changed by opening and closing mine doors. The effective dose of the mountain guide was cut in half to 4.8 mSv per year. A mine air experiment was carried out for...
The number of monitored persons at radon exposed workplaces has risen to 292 in Saxony in 2016. As a result, the radiation protection authority had to deal with user criticism of personal dosimetry during supervisions. The fixed reference dosimeters for the personal radon dosimetry in coops and site caravans disrupt the organization at work. In add...
A new Express-Brattice-System (EBS) for miners was developed to reduce the radon exposures of miners at small construction sites of old mining. The EBS is a lightweight, modular and reusable construction kit of interlocking telescopic aluminum tubes, plastic foils and glue foam to shut off radon rich parts of galleries in some minutes only. Das Exp...
Das Express-Wetterblenden-System (EWS) ist eine Schnellbaublende im Baukastensystem bestehend aus zweiteiligen, ineinander steckbaren Teleskoprohren aus Aluminium in unterschiedlichen Längen, radondichter Folie und Bauschaum. Mit dem EWS können in kürzester Zeit Grubenbaue mit beliebigen Querschnitten abgetrennt werden. Das EWS ist leicht und daher...
Die Erfindung betrifft ein Verfahren zum Errichten einer Wetterblende zum Abdichten einer Bergbauöffnung in einem Gebirge und eine Wetterblende zur Durchführung des Verfahrens, wobei die Wetterblende aus einem Haltegerüst und einer luftundurchlässigen Abdichtungsbahn besteht.
Aufgabe der Erfindung ist es, ein Verfahren und eine Wetterblende vorzusc...
A new Express-Brattice-System (EBS) for miners was developed to reduce the radon exposures of miners at small construction sites of old mining. The EBS is a lightweight, modular and reusable construction kit of interlocking telescopic aluminum tubes, plastic foils and glue foam to shut off radon rich parts of galleries in some minutes only.
ABSTRACT: A new Express-Brattice-System (EBS) for miners was developed to reduce the radon exposures of miners at small construction sites of old mining. The EBS is a lightweight, modular and reusable construction kit of interlocking telescopic aluminum tubes, plastic foils and glue foam to shut off radon rich parts of galleries in some minutes onl...
A new Express-Brattice-System (EBS) for miners was developed to reduce the radon exposures of miners at small construction sites of old mining. The EBS is a lightweight, modular and reusable construction kit of interlocking telescopic aluminum tubes, plastic foils and glue foam to shut off radon rich parts of galleries in some minutes only. Zur Sen...
More than 40 underground construction sites have been supervised by the radiation protection authority in Saxony in recent years. The presentation deals with stories of underground supervisions to share the experiences with authorities and miners to improve the underground radiation protection. A new Express-Brattice-System (EBS) for miners was dev...
More than 40 underground construction sites of old mining have been supervised by the radiation protection authority in Saxony in recent years. The paper deals with stories of underground supervisions to share the experiences with authorities and miners to improve the underground radiation protection. Supervision usually includes continuous measure...
A new Express-Brattice-System (EBS) for miners was developed to reduce the radon exposures of miners at small construction sites of old mining. The EAS is a lightweight, modular and reusable construction kit of interlocking telescopic aluminum tubes, plastic foils and glue foam to shut off radon rich parts of galleries in some minutes only.
Zur Se...
More than 40 underground construction sites have been supervised by the radiation protection authority in Saxony in recent years. The poster deals with stories of underground supervisions to share the experiences with authorities and miners to improve the underground radiation protection. A new Express-Brattice-System (EBS) for miners was developed...
More than 40 underground construction sites have been supervised by the radiation protection authority in Saxony in recent years. The paper deals with stories of underground supervisions to share the experiences with authorities and miners to improve the underground radiation protection. A new Express-Brattice-System (EBS) for miners was developed...
The demands of the EC Water Framework Directive are opening new possibilities for the application of investigation methods that were formerly used only at contaminated sites. This work describes the application of Direct Push (DP) techniques for the recording and geostatistical processing of high resolution groundwater quality profiles. These profi...
Mit einer flächendeckenden Befragung von 194 Wassserver- und Abwasserentsorgern wurde der betriebswirtschaftliche Kostendeckungsgrad in Sachsen bei den Wasserversorgungsleistungen mit 99 % und bei Abwasserentsorgungsleistungen mit 95 % für Teil- und 98 % für Vollentsorgung ermittelt. Hinsichtlich der Umsetzung des Grundsatzes der Kostendeckung ents...
Die Studie ermittelt den betriebswirtschaftlichen Kostendeckungsgrad bei 194 sächsischen Wasserver- und Abwasserentsorgern.
Der Kostendeckungsgrad liegt bei den Wasserversorgungsleistungen bei 99 Prozent und bei den Abwasserentsorgungsleistungen bei 95 Prozent für Teil- bzw. bei 98 Prozent für Vollentsorgung. Damit hat der Freistaat Sachsen bei de...
Mit dem Modell STOFFBILANZ wurden die Stickstoff-, Phosphor- und Sedimenteinträge in
die Gewässer im Freistaat Sachsen quantifiziert. Die Ergebnisse enthält der Nährstoffatlas
Sachsen. Daraus wurden regionale Bewirtschaftungsziele abgeleitet und eine Gebietskulisse
„Wasserrahmenrichtlinie/ Hochwasserschutz“ zur Förderung von Agrarumweltmaßnahmen
im...
The input of nitrogen, phosphor and sediments in the waters of Saxony was quantified with the model Stoffbilanz. The results are compiled in the nutrient map Saxony. Regional management objectives were drawn from these results and the special area of conservation "Water Framework Directive/Flood protection" for the promotion of agricultural environ...
The estimation of the infiltration of lake and river waters into aquifers is of vital interest in many fields. The paper focuses on the use of radon as an indicator for the assessment of such infiltration processes. Radon is produced naturally in every aquifer matrix and thus as the naturally occurring compound is present in groundwater. On the con...
Die EU-Wasserrahmenrichtlinie (WRRL) verlangt bis zum Jahr 2009 die Erarbeitung von Bewirtschaftungsplänen nach Flusseinzugsgebieten und das Erstellen von Maßnahmenprogrammen für Wasserkörper, die die Ziele der Richtlinie bis 2015 wahrscheinlich nicht erreichen. Bei der Bestandsaufnahme der WRRL wurden Grundwasserkörper ausgewiesen und deren Belast...
The status review is the first milestone of the Water Framework Directive (WFD) implementation. It had been finished in time and was delivered to the European Union commission in the “Report 2005”. The main problem of surface water consists in deficits of the criteria of fish fauna, which results mainly from structural deficits of the water bodies...
The Water Framework Directive governs the protection of groundwater and surface water and promotes sustainable water use. It sets up a timetable to ensure that a good status of all waters will be achieved by 2015. The first step is a status review of the waters. For the groundwater, this procedure is divided into an initial characterisation, a furt...
Die Staatliche Umweltbetriebsgesellschaft (UBG) führt im Auftrag des Sächsischen Landesamtes für Umwelt und Geologie zahlreiche Grundwasserprobennahmen an Landes- und Sondermessnetzen durch. Dabei entstand die Besorgnis, dass bei der Beprobung hoch kontaminierter Grundwässer Gesundheitsgefährdungen für die Probennehmer bestehen könnten. Aus diesem...
Bei der Errichtung neuer Grundwasserbeschaffenheitsmessstellen gibt es zum Sumpfrohr zwei unterschiedliche Auffassungen: Während ein Teil der Fachleute Sumpfrohre zur Vermeidung einer schnellen Versandung von Messstellen als notwendig ansieht, befürchten andere eine Beeinflussung der Grundwasserproben durch die sich in Sumpfrohren ansammelnde Trübe...
The assessment of diffuse contamination inputs to groundwater for its initial characterisation, has been carried out for Saxony by a combined emission/ immission approach, using classified cartographic satellite data IRS-1C. As a result, 23 groundwater bodies (of a total of 67 mainly covering Saxon territory bodies) have been detected as potentiall...
Für viele Gebiete der Umweltüberwachung werden Grundwasseranalysen in großer Zahl benötigt. Die Analysenmethoden sind ausgereift. Eine wesentliche Fehlerquelle bei der Bestimmung von Wasserinhaltsstoffen ist die Probennahme. Aus diesem Grund wurden die Anforderungen an eine repräsentative Grundwasserprobennahme analysiert und darauf aufbauend ein K...
In the last years various authors recommended low-flow purging and sampling ( 0,5 L/min) for ground water sampling due to increased transport of particle bound compounds and the possibility of degasification. Low-flow sampling needs more sampling time than conventional sampling techniques. The aim of the study was the evaluation of effects of diff...
The invention describes a method and apparatuses for characterizing groundwater measuring sites by differentiating between groundwater and static water and serves, for example, for determining the pumping-out times of groundwater measuring sites, optimum for investigations of the representative nature, as well as for identifying and localizing defe...
A process and devices are disclosed for characterizing ground water measuring Points by distinguishing ground water from subterranean water accumulation, and are useful in particular for determining the optimim pumping times of ground water measurement points for representative quality tests and for recognising and localising defects in ground wate...
Das Sächsische Landesamt für Umwelt und Geologie betreut mehrere Messnetze zur Grundwasserbeobachtung. An die Repräsentativität der Messergebnisse werden hohe Anforderungen gestellt. Deshalb sollen die Kenntnisse zu einer effektiven und repräsentativen Grundwasserprobennahme vertieft werden. Die Dauer des Abpumpens von Grundwassermessstellen ist ei...
Das Sächsische Landesamt für Umwelt und Geologie betreut mehrere Messnetze zur Grundwasserbeobachtung. An die Repräsentativität der Messergebnisse werden hohe Anforderungen gestellt. Deshalb sollen die Kenntnisse zu einer effektiven und repräsentativen Grundwasserprobennahme vertieft werden. Die Dauer des Abpumpens von Grundwassermessstellen ist ei...
Particles, included in the three environmental spheres of the earth, are important components in water, soil and atmosphere. There is a wide-spread distribution of particles with a diameter between 0.5 µm and 200 µm in ground water, where they can play an active role as solid matter due to their immense surface and multivalent hydrochemical functio...
Bei der Behandlung von Grundwasserschäden werden zunehmend Prozesse der natürlichen Selbstreinigung des Grundwasserleiters einbezogen. Zur Überwachung und Bewertung dieser Prozesse sind standortspezifische Monitoringsysteme für eine verlässliche Grundwasserbeobachtung erforderlich. Die Grundwassermessstellen dieser Systeme müssen für die Entnahme r...
Verfahren zur Unterscheidung von Grund- und Standwasser in Grundwassermessstellen zwecks Bestimmung optimaler Abpumpzeiten bei der Probennahme, dadurch gekennzeichnet, dass
- während des Abpumpvorgangs in definierter zeitlicher Aufeinanderfolge Wasserproben entnommen werden,
- von den entnommenen Proben die Radonaktivitätskonzentration gemessen wir...
The invention describes a method and apparatuses for characterizing groundwater measuring sites by differentiating between groundwater and static water and serves, for example, for determining the pumping-out times of groundwater measuring sites, optimum for investigations of the representative nature, as well as for identifying and localizing defe...
Advantages and disadvantages of fully screened and depth-orientated observation wells in porous aquifers are diversely evaluated in hydrogeological practice. Although guidelines refer to the risk of groundwater mixing downstream of fully screened wells, installation of fully screened wells continues. This paper includes an overview about guidelines...
Advantages and disadvantages of fully screened and depth-oriented observation wells in porous aquifers are diversely evaluated in hydrogeological practice. Although guidelines refer to the risk of groundwater mixing downstream of fully screened wells, installation of fully screened wells continues. This paper includes an overview of guidelines for...
Der Messstellentyp muss dem Erkundungsziel und der hydrogeologischen Situation entsprechen. Zur Erreichung des Erkundungsziels kann die Gewinnung von Mischwasserproben über größere vertikale Abschnitte des Grundwasserleiters oder von tiefenorientierten Grundwasserproben notwendig sein. Mischwasserproben ermöglichen einen zusammenfassenden Überblick...
Die Technologie der Grundwasserprobennahme wird beschrieben. Das Poster enthält Hinweise zu Prüfliste, Messstellenpass, Lotung der Messstelle, Optimierung der Förderrate, Volumenmessung und das optimale Abpumpvolumen.
To determine optimum pump volumes for groundwater observation wells, in addition to the usual parameters electrical conductivity, temperature and pH employed to keep track of the quality criterion, the natural radon activity concentration of the groundwater was used to monitor the hydraulic criterion during groundwater sampling. This technique impr...