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Stephan T.A.,TUV NORD Systems GmbH and Co. KG | Moch E.,TUV NORD Systems GmbH and Co. KG | Hauschild J.,TÜV SÜD | Rumpf J.,TUV NORD Systems GmbH and Co. KG | And 2 more authors.
Chemie-Ingenieur-Technik | Year: 2013

Whilst many of Germany's neighbors apply probabilistic safety and risk analyses along with the corresponding valuation criteria, this is not yet the case in Germany. Nevertheless risk analyses are carried out in Germany as well. Some of these applications are described in this article. Furthermore possibilities are pointed out for using probabilistic analyses as a complement of the proved deterministic procedure. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

The inspections according to § 14 of the German plant safety ordinance (Betriebssicherheitsverordnung) to be performed by an accredited inspection body (ZÜS) are an important milestone within the commissioning phase of a power plant. In the commissioning phase of unit D of the Lingen CCGT plant, the corresponding actions of the manufacturer with its notified body on the one hand and the plant operator with its ZÜS on the other hand were in interaction. The relevant interfaces and scopes of work have been defined through early coordination.

To assess technical installations proactively and decide whether special inspections are necessary to protect employees and third-parties based on the potential risks they pose, a research project called Criteria to assess the risks posed by technical installations was performed. It looks at the effect that potentially dangerous installations can have beyond the immediate surroundings and to what extent inspections can affect how safe technical installations are based on the quality and frequency of the inspections. The results can help determine which technical installations are so dangerous that they require additional monitoring by third-parties and which safety measures for handling these installations should be regulated by law. © 2011 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Both in national and in European regulations and rules defaults are contained of the technology for the installation of fire detection and fire fighting systems in rolling stock. These contain however no requirements regarding the verification for functionality, effectiveness and reliability of these systems. For this reason guidelines have been compiled by the "Arbeitsgemeinschaft Brandmelde- und Brandbekämpfungstechnik in Schienenfahrzeugen (ARGE)", which are presented in this publication. The experience shows that the proof procedures are practicably, at relative expenditure feasible and necessary. The ARGE guidelines achieved a large acceptance and are now an important component for the fire protection-technical evaluation in the permission process of rolling stock.

Fechner D.,Helmholtz Center Geesthacht | Fechner D.,TUV NORD Systems GmbH and Co. KG | Hort N.,Helmholtz Center Geesthacht | Blawert C.,Helmholtz Center Geesthacht | And 3 more authors.
Journal of Materials Science | Year: 2012

The increasing use of magnesium castings for automotive components and the number of newly developed alloys raise the question of suitable recycling processes. Remelting offers a high potential of energy saving and thereby improves the live cycle balance of magnesium components. Effective recycling processes are likely to involve the mixing of different alloys but little is known about the interaction of alloying elements. In order to approach this issue, the influence of strontium, silicon and calcium on phase formation and mechanical properties of magnesium alloy AM50 has been investigated. After strontium addition, X-ray diffraction demonstrated the formation of the Al4Sr and the Mg 17Sr 2 phases. However, after simultaneous alloying with strontium, silicon and calcium the ternary Zintl phase Sr 6.33Mg 16.67Si 13 was detected. This phase forms preferably instead of Al 4Sr,Mg 17Sr 2 andMg 2Si. Compared to the two strontium-containing phases, precipitates of the ternary Zintl phase exhibit a rather compact morphology. This results in a higher elongation-at-fracture under tensile stress. © 2012 Springer Science+Business Media, LLC.

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