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Modelling and code development for the improved description of fp and aerosol release during lwr core heat -up and degradation

Description: Das Projekt "Modelling and code development for the improved description of fp and aerosol release during lwr core heat -up and degradation" wird vom Umweltbundesamt gefördert und von Institut für Kerntechnik und Energiewandlung durchgeführt. Objective: The objective of the present research is to improve the modelling of fp/aerosol release during core heat-up and degradation, introducing models of the physical processes governing the fuel structure modifications and transformations and describing the interactions with phenomena of various natures which influence and determine these processes. General information: the present research activity is divided into the following tasks: 1. Assessment of the advanced module mitra and evaluation of the development and validation needs to make it applicable to fission product transport behaviour in the various phases of fuel degradation. 2. Comparison of the modelling capabilities of mitra and fiprem and respective code structure in view of setting-up an integrated module. 3. Integration of mitra/fiprem into a single module, coupling with kess and sensitivity studies. The two codes will be merged into a single module treating fp/aerosol release phenomena by a mechanistic description. The new module will be coupled with kess. A sensitivity study will be performed on relevant parameters which exert a strong influence of fp/aerosol release. 4. Elaboration of models of fp mass and energy sources in the core thermo hydraulics and of the interface/coupling requirements with thermo hydraulics and fp chemistry codes. 5. Applications to the phebus fp predictions.

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SupportProgram

Origin: /Bund/UBA/UFORDAT

Tags: Brennstoff ? Leichtwasserreaktor ? Thermodynamik ? Mechanisches Verfahren ? Aerosol ? Brennstoffverbrauch ? Energieträger ? Hydraulik ? Integrierte Umweltschutztechnik ? Kerntechnische Anlage ? Schadstoffemission ? Verfahrensparameter ? Strahlung ? Physikalisches Verfahren ? Kerntechnik ? Emission ? Modul ? Physikalisches Modell ? Prognosemodell ? Schadstoffausbreitung ? Energiequelle ? Sensitivitätsanalyse ? Studie ? Technikfolgenabschätzung ? Bewertungsverfahren ? Energieumwandlung ? Vergleichsanalyse ? Bohrkern ? Produktbewertung ? Modellierung ? Prozesskettenanalyse ? Ausbreitungsvorgang ? Radioaktivität ? Stofftransport ? Anlagenbetrieb ? Physikalische Größe ? Physikalischer Vorgang ? Spaltprodukt ? Brennstoffzusammensetzung ? Temperaturerhöhung ?

Region: Baden-Württemberg

Bounding box: 9° .. 9° x 48.5° .. 48.5°

License: cc-by-nc-nd/4.0

Language: Deutsch

Organisations

Time ranges: 1988-12-21 - 1990-12-20

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