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Example text
In the top of ducts, however, could have the opposite effect due to turbulence generation. The ignition inside venting devices needs to be further investigated. The principal purpose of inerting is to limit the supply of oxygen.
2, Helium-Helium Intermediate Heat Exchanger An intermediate heat exchanger (IHX) circuit serves as an interface component to connect the nuclear with the chemical system. It thus • • • 24 minimizes contamination of the process heat exchanger and allows it to be placed outside the reactor containment, prevents water and process gas ingress into the nuclear core in case of a tube rupture, and reduces hydrogen permeation from the process gas into the primary helium as well as tritium permeation in the reverse direction.
Secon. 10 125 KVK Prim. Secon. 85 Temperature in [°C] 950 220 950 220 950 220 950 220 Temperature out [°C] 293 900 293 900 293 900 293 900 No. 5 25 The IHX is a new type of component in terms of its specific nuclear requirements and its thermal load. The aim is a service life of 140,000 h at a system pressure of 4 MPa and temperatures up to 950 °C [29]. Drawbacks of an IHX are its technical problems due to the higher temperature, plus 50 - 70 K, compared with the reformer, its additional electricity demand, 50 MW(e) in a 3000 MW(th) PNP HTGR, which reduces the overall efficiency and last but not least, the fact that it presents an additional component which may fail.