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DOI: 10.5445/IR/1000076910

Lessons learned from the QUENCH-LOCA experiments

Stuckert, Juri; Große, Mirco; Steinbrück, Martin; Walter, Mario; Wensauer, Andreas

Abstract (englisch):
Seven QUENCH-LOCA bundle tests (QUENCH-L0…-L5 and -L3HT) with different cladding materials (Zry-4, M5®, Opt. ZIRLO™) were performed according to a temperature/time-scenario typical for a LBLOCA in German PWRs. For two tests (QUENCH-L4 and -L5) pre-hydrogenated claddings (with 100 and 300 wppm H for M5® and Opt. ZIRLO™, correspondingly) were used. Generally, a peak cladding temperature of about 1350 K (1250 K for QUENCH-L5) was reached at the end of the heat-up phase at the bundle elevation of 950 mm. The maximal heat-up rate was 8 K/s (2.6 K/s for commissioning test QUENCH-L0); the cooling phase lasted about 120 s (0 s for QUENCH-L0) and was terminated by 3.3 g/s/effective rod water flooding. The tangential temperature gradient across a rod was between 30 and 70 K on the burst onset.
The detailed profilometry measurements performed over whole length of the claddings showed formation of not only main ballooning area (with burst) but also, for several rods of each bundle, additional two or three ballooning regions. Another parameter calculated based on profilometry measurements is the bundle blockage. The maximal coolant channel bloc ... mehr

Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Angewandte Werkstoffphysik (IAM-AWP)
Publikationstyp Vortrag
Jahr 2017
Sprache Englisch
Identifikator URN: urn:nbn:de:swb:90-769106
KITopen ID: 1000076910
HGF-Programm 32.02.11; LK 01
Erschienen in 23rd International QUENCH Workshop, Karlsruhe Institute of Technology, Karlsruhe, 17.-19.10.2017
Bemerkung zur Veröffentlichung Proceedings of the 23th QUENCH Workshop:
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