Published September 1982
| Version v1
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Investigations on reactivity accidents with the HTR-module
Description
Using the axially one-dimensional short-time dynamics program DYNOTTO, power transients and temperature transients of low-power pebble-bed HTR (HTR-Module) in reactivity accidents within the first half hour have been investigated. Even in case of accidents such as the uncontrolled withdrawal of all control rods, assuming complete failure of the shut-down mechanism it is shown that especially low-power HTR are highly inherently safe. Fuel temperatures remain below 1,2000C and during the further history of the accident, largely determined by after-heat development, no critical values could be detected. (orig.)
Availability note (English)
MF available from INIS under the Report Number.Abstract (German)
Unter Verwendung des axial-eindimensionalen Kurzzeitdynamik-Programms DYNOTTO werden Leistungs- und Temperaturtransienten eines Kugelhaufen-Hochtemperaturreaktors kleiner Leistung (HTR-Modul) bei Reaktivitaetsstoerfaellen innerhalb der ersten halben Stunde untersucht. Auch bei Stoerfaellen wie dem ungewollten Ausfahren aller Regelstaebe mit unterstelltem Ausfall der gesamten Anlagenabschaltung zeigt sich die hohe inhaerente Sicherheit insbesondere kleiner Hochtemperaturreaktoren. Die Brennstofftemperaturen bleiben unter 1.2000C, und auch fuer den weiteren, von der Nachwaermeproduktion bestimmten Stoerfallverlauf zeichnen sich keine kritischen Werte ab. (orig.)
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Additional details
Additional titles
- Original title (German)
- Untersuchungen zu Reaktivitaetsstoerfaellen beim HTR-MODUL
Publishing Information
- Imprint Pagination
- 17 p.
- Report number
- Juel-Spez--172
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 14772761
- Subject category
- S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Descriptors DEI
- ACCIDENTS; D CODES; HTGR TYPE REACTORS; PEBBLE BED REACTORS; REACTIVITY
- Descriptors DEC
- COMPUTER CODES; GAS COOLED REACTORS; GRAPHITE MODERATED REACTORS; HOMOGENEOUS REACTORS; REACTORS; SOLID HOMOGENEOUS REACTORS