Gas Turbine High Temperature Reactor Power Plant. GHR project. Volume IV. Experimental investigations. Reporting Period 1964-1965

Automatic translation: For the project of a gas turbine, which is located in the primary circuit of a gas-cooled high-temperature reactor (GHR) and is therefore under helium pressure, it should be clarified - whether helium affects the long-term behavior of the materials, those for gas turbines and adjacent plant components in question come, unfavorably influenced. It was initially feared that at the high temperatures of 600 to 800°C grain boundaries Injury could be caused by the helium that possibly lead to embrittlement of the materials and thus cause premature, non-deforming fractures of system parts could. From the few data in the literature (1) (2) on the creep behavior of some materials in helium atmosphere was.not clear whether with a damaging influence of helium, in particular larger deformations, must be expected. Therefore should own experiments shed light on this.