Parametric thermohydraulic calculations for advanced pressurized water reactors with the code HADA-2
Description
The paper describes the improvements introduced in the computer code HADA for the thermohydraulic design of Advanced Pressurized Water Reactors. The main modifications are the use of the water enthalpy, rather than the water temperature, for the equation giving the limitation due to the hot channel factor, and the introduction of a correction factor to ensure that the ratio between the critical heat flux and the hot channel heat flux is always greater than 1.3. About 200 different reactors have been calculated with the improved version HADA-2 of the code. The main results of these calculations are that, in the range of interest, homogeneous and heterogeneous reactors are about equivalent (same net electrical output of the plant for the same ratio between water and fuel rod volume). For the homogeneous reactors the optimum designs are for H/d=20 (H=axial pitch of the integral spiral ribs on fuel rod surface, d=diameter of the fuel rod) and for the heterogeneous reactors for H/d=35. (orig.)
Availability note (English)
MF available from INIS under the Report Number.Abstract (German)
Der Bericht beschreibt die Verbesserung, die in dem Rechenprogramm HADA zur thermohydraulischen Auslegung von fortgeschrittenen Druckwasser-Reaktoren eingefuehrt worden sind. Die wichtigsten Aenderungen sind die Verwendung von Wasserenthalpie anstelle von Wassertemperatur in der Gleichung, die der Begrenzung aus dem Heisskanalfaktor entspricht und die Einfuehrung eines Korrekturfaktors, so dass das Verhaeltnis zwischen kritischer Heizflaechenbelastung und Heisskanalheizflaechenbelastung immer groesser als 1.3 ist. Etwa 200 Reaktoren sind mit der verbesserten Version HADA-2 des Rechenprogrammes gerechnet worden. Die Hauptergebnisse dieser Berechnungen sind, dass die homogenen und heterogenen Reaktoren in dem praktisch interessanten Bereich etwa aequivalent sind (etwa gleiche elektrische Kraftwerknettoleistung fuer gleiches Verhaeltnis zwischen Wasser- und Brennstabvolumen). Die optimale Auslegung fuer die homogenen Reaktoren ist fuer H/d=20 (H=axiale Steigung der integralen spiralfoermigen Rippen auf der Brennstaboberflaeche, d=Brennstabdurchmesser) und fuer die heterogenen Reaktoren fuer H/d=35. (orig.)
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Additional details
Publishing Information
- Imprint Pagination
- 122 p.
- Report number
- KFK--4148
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 18023938
- Subject category
- S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Descriptors DEI
- CRITICAL HEAT FLUX; DEPARTURE NUCLEATE BOILING; FORTRAN; FUEL RODS; H CODES; HYDRAULICS; PRESSURE DROP; PWR TYPE REACTORS; REACTOR CORES; TEMPERATURE DEPENDENCE
- Descriptors DEC
- BOILING; COMPUTER CODES; ENRICHED URANIUM REACTORS; FUEL ELEMENTS; HEAT FLUX; NUCLEATE BOILING; PHASE TRANSFORMATIONS; POWER REACTORS; PROGRAMMING LANGUAGES; REACTOR COMPONENTS; REACTORS; THERMAL REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS
Optional Information
- Secondary number(s)
- EUR--10532e.