Fission product behaviour during faults in light water reactors
Creators
- 1. Kraftwerk Union A.G., Erlangen (Germany, F.R.). Hauptabteilung Radiochemie/Nachbestrahlungsuntersuchungen
Description
The most important chemical reactions of the fission iode from serious faults in light water reactors have been taken into account in the latest transfer models (in the Federal Republic of Germany in the code IMPAIR), which describes behaviour and release in the case of core melt-down. The result of this study is that even when there are serious faults, the fission iode emitted from the fuel as a result of reactions determined by the law of nature is kept predominantly within the reactor plant and only a very small proportion reaches the surrounding neighbourhood. As proof that these model analyses are also valid in real practice, the behaviour of the fission iode can be valid for the accident at TMI 2. In such a serious incident only very small parts (an order of magnitude of 10-4%) of the fission iode released from the fuel escaped into the surrounding environment as a result of the chemical reactions of that kind. (orig.)
Abstract (German)
Die wichtigsten chemischen Reaktionen des Spaltiods aus schweren Stoerfaellen in Leichtwasserreaktoren wurden in neueren Transportmodellen beruecksichtigt (in der Bundesrepublik Deutschland im Code IMPAIR), die das Verhalten und die Freisetzung im Kernschmelzfall beschreiben. Das Ergebnis dieser Analysen ist, dass auch bei derart schweren Stoerfaellen das aus dem Brennstoff ausgetretene Spaltiod infolge naturgesetzlich bedingter Reaktionen weitaus ueberwiegend innerhalb der Reaktoranlage zurueckgehalten wird und nur ein sehr kleiner Anteil in die Umgebung gelangt. Als Beweis dafuer, dass diese Modellbetrachtungen auch in der Realitaet Gueltigkeit haben, kann das Verhalten des Spaltiods beim Stoerfall TMI-2 gelten. Als Folge derartiger chemischer Reaktionen sind bei diesem schweren Stoerfall nur sehr geringe Anteile (Groessenordnung 10-4%) des aus dem Brennstoff freigesetzten Spaltiods in die Umgebung uebergetreten. (orig.)Additional details
Additional titles
- Original title (German)
- Auswirkung chemischer Reaktionen auf das Verhalten des Spaltiods bei hypothetischen Ereignissen im Leichtwasserreaktor
Publishing Information
- Journal Title
- VGB Kraftwerkstech.
- Journal Volume
- 66
- Journal Issue
- 4
- Series
- VGB Kraftwerkstech.
- Journal Page Range
- 389-394
- ISSN
- 0372-5715
- CODEN
- VGBKB
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 17062826
- Subject category
- S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Descriptors DEI
- CESIUM; CESIUM IODIDES; CHEMICAL REACTIONS; CONTAINMENT; ENVIRONMENTAL IMPACTS; FALLOUT; FEDERAL REPUBLIC OF GERMANY; FISSION PRODUCT RELEASE; HYPOTHESIS; IODINE; MATHEMATICAL MODELS; MELTDOWN; ORGANIC IODINE COMPOUNDS; PRIMARY COOLANT CIRCUITS; PWR TYPE REACTORS; RADIOACTIVE AEROSOLS; REACTOR CORES; SILVER; SILVER IODIDES; THREE MILE ISLAND-2 REACTOR
- Descriptors DEC
- ACCIDENTS; AEROSOLS; ALKALI METAL COMPOUNDS; ALKALI METALS; CESIUM COMPOUNDS; COLLOIDS; COOLING SYSTEMS; DEVELOPED COUNTRIES; DISPERSIONS; ELEMENTS; ENRICHED URANIUM REACTORS; EUROPE; HALIDES; HALOGEN COMPOUNDS; HALOGENS; IODIDES; IODINE COMPOUNDS; METALS; NONMETALS; ORGANIC COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; POWER REACTORS; REACTOR ACCIDENTS; REACTOR COMPONENTS; REACTOR COOLING SYSTEMS; REACTORS; SILVER COMPOUNDS; SOLS; THERMAL REACTORS; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS; WATER COOLED REACTORS; WATER MODERATED REACTORS