Published 1984 | Version v1
Report Restricted

Considerations of material transport and blockage formation in deformed fuel element clusters of LMFBRS

Creators

  • 1. GKSS-Forschungszentrum Geesthacht G.m.b.H., Geesthacht-Tesperhude (Germany, F.R.). Inst. fuer Anlagentechnik

Description

Local coolant blockages have been considered so far only for intact fuel element geometry. Operational experience of subassembly behaviour in sodium cooled fast breeder reactors however show that deformation of bundles have to be included in further considerations. Material sources for particulate and blockage forming matter as well as the transport behaviour of granulate are discussed in this report. In principle no safety relevant worse consequences are expected in the case of deformed fuel rods and spacers compared to the intact geometry with respect to formation and growth of local blockages in the high power core region. (orig.)

Availability note (English)

MF available from INIS under the Report Number.

Abstract (German)

Lokale Kuehlkanalblockaden wurden bisher nur fuer intakte Brennelementgeometrien untersucht. Betriebserfahrungen bezueglich des Brennelementverhaltens in natriumgekuehlten Schnellen Brutreaktoren zeigen jedoch, dass auch deformierte Buendel in die Betrachtungen einzubeziehen sind. Materialquellen fuer partikelfoermige Blockadebildner und das Transportverhalten von Granulat werden in diesem Bericht mitdiskutiert. Grundsaetzlich werden keine im sicherheitstechnischen Sinne verschlechternden Auswirkungen der Stab- und Abstandshalterdeformationen im Vergleich zu intakter Geometrie auf die Bildung und das Wachstum von lokalen Kuehlungsstoerungen im Leistungsbereich des Reaktorkerns erwartet. (orig.)

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Additional details

Additional titles

Original title (German)
Betrachtungen zum Materialtransport und zur Blockadebildung in deformierten Brennelementbuendeln von Schnellen Brutreaktoren

Publishing Information

Imprint Pagination
15 p.
Report number
GKSS--84/E/2

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
15044298
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Descriptors DEI
BAKING; DEFORMATION; FLOW BLOCKAGE; FUEL ELEMENT CLUSTERS; FUEL ELEMENT FAILURE; GRANULAR MATERIALS; LMFBR TYPE REACTORS; PARTICLES; SPACERS; SWELLING; VELOCITY
Descriptors DEC
ACCIDENTS; BREEDER REACTORS; EPITHERMAL REACTORS; FAST REACTORS; FBR TYPE REACTORS; FUEL ASSEMBLIES; HEATING; LIQUID METAL COOLED REACTORS; MATERIALS; REACTOR ACCIDENTS; REACTORS

Optional Information

Notes
With 4 figs., 1 tab.