Published February 1993 | Version v1
Report Restricted

ZEISIG: Approximate calculation of the intergranular gas fraction and the intragranular gas driven swelling for SAS4A

Creators

Description

A simple model has been developed for estimating, under steady-state irradiation conditions and for operational transients, the fraction of intergranular gas residing in fast reactor fuel and the intragranular gas driven swelling. The total gas retention in the fuel, the grain size and the irradiation conditions (mainly time dependent temperatures) must be known. Use has been made of parts of the fission gas model contained in the code LAKU and of results calculated with this code. The routine (named ZEISIG) is intended for insertion into the fast reactor accident model SAS4A as an extension of its fission gas model for steady-state reactor operation. (orig.)

Availability note (English)

MF available from INIS under the Report Number.

Abstract (German)

Ein einfaches Modell ist entwickelt worden zu dem Zweck, den intergranularen Gasanteil und das intragranulare Schwellen im Brennstoff Schneller Reaktoren bei stationaerer Bestrahlung und bei Betriebstransienten zu bestimmen. Die gesamte Gasrueckhaltung im Brennstoff, die Korngroesse und die Bestrahlungsbedingungen (im wesentlichen die zeitabhaengigen Temperaturen) muessen bekannt sein. Zum Teil werden Modellvorstellungen aus dem Code LAKU benutzt, zum Teil Rechenergebnisse dieses Codes. Das Modell (ZEISIG) ist fuer einen Einbau in den Reaktor-Unfallcode SAS4A bestimmt zur Erweiterung seines Spaltgasmodells fuer stationaeren Reaktorbetrieb. (orig.)

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Additional details

Publishing Information

Imprint Pagination
43 p.
Report number
KFK--5124

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
25010981
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Descriptors DEI
COMPUTER CODES; FBR TYPE REACTORS; FISSION PRODUCTS; FUEL PINS; GASES; GRAIN BOUNDARIES; IRRADIATION; MATHEMATICAL MODELS; REACTOR OPERATION; STEADY-STATE CONDITIONS; SWELLING; TRANSIENTS; Z CODES
Descriptors DEC
BREEDER REACTORS; CRYSTAL STRUCTURE; DEFORMATION; EPITHERMAL REACTORS; FAST REACTORS; FLUIDS; FUEL ELEMENTS; ISOTOPES; MATERIALS; MICROSTRUCTURE; OPERATION; RADIOACTIVE MATERIALS; REACTOR COMPONENTS; REACTORS