Slug Impact Loading on the Vessel Head during a Postulated In-Vessel Steam Explosion in Pressurized Water Reactors–Assessments and Discussion of the Investigation Strategy
| Autor: | R. Krieg, G. Messemer, E. Stratmanns, T. Stach, T. Malmberg |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Nuclear and High Energy Physics
Nuclear engineering 05 social sciences Pressurized water reactor Nuclear reactor 050905 science studies Condensed Matter Physics Pressure vessel law.invention 03 medical and health sciences 0302 clinical medicine Safeguard Nuclear Energy and Engineering Containment law Environmental science Head (vessel) 0509 other social sciences Reactor pressure vessel 030217 neurology & neurosurgery Steam explosion |
| Zdroj: | Nuclear Technology. 111:369-385 |
| ISSN: | 1943-7471 0029-5450 |
| DOI: | 10.13182/nt95-a15867 |
| Popis: | The most severe consequence of a pressurized water reactor in-vessel steam explosion is a molten fuel slug impact against the head of the reactor pressure vessel that could cause a failure of this head and lead to missiles endangering the reactor containment. An investigation is described that attempts to determine the maximum slug impact that a vessel head is capable of withstanding without failing and, consequently, without impairing the containment safety-related function. Preliminary theoretical assessments are presented that suggest that the head might be able to withstand rather strong impacts and that the shape of the fuel slug will have only a moderate influence on the results, provided the upper internal structures are taken into account. A low sensitivity against the slug shape is an essential prerequisite for a reliable safety proof. However, investigations primarily based on computational models are not sufficient; therefore, an investigation concept is proposed that relies on model experiments in which the geometry is scaled down by factors of 10 and 20, respectively. Theoretical and experimental investigations for liquid-structure impact problems in different scales are discussed to assess the degree of similarity that can be obtained. Finally, model experiments are described in some detail simulating themore » molten fuel slug impact on the vessel head.« less |
| Databáze: | OpenAIRE |
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