Production of Radiolytic Gas Bubbles and Their Influence on the Dynamic Behavior of Water Boiler Reactors (thesis); BILDUNG VON RADIOLYTISCHEN BLASEN UND IHR EINFLUSS AUF DAS DYNAMISCHE VERHALTEN VON WASSERKOCHER-REAKTOREN (THESE) (in German)
Technical Report
·
OSTI ID:4028355
Experiments performed in the normal operation range of the Water Boiler Reactor FRF (L-54-F) show that radiolytic gas bubbles are formed only after a critical energy input, when the fuel solution has become highly supersaturated with dissolved gas. The supersaturation observed can be shown to be high enough to allow a nucleation of gas bubbles by the recoil of fission fragments. A simplified dynamical model for water boiler reactors is developed, which includes the critical energy for bubble formation. For power excursions following large positive step reactivity insertions, an explicit solution can be obtained which gives the energy up to the power peak in terms of the reactor parameters including the critical energy for bubble formation. The results of the calculations are in good agreement with the results of the KEWB experiments. (auth)
- Research Organization:
- Frankfurt am Main. Universitat. Institut fur Kernphysik (Germany)
- NSA Number:
- NSA-18-019312
- OSTI ID:
- 4028355
- Report Number(s):
- IKF-9
- Country of Publication:
- Germany
- Language:
- German
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