Published September 1977 | Version v1
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Experimental check of models and data to describe the resonance-absorption in HTR-fuel

Creators

Description

Measurements of effective resonance integrals of spherical HTGR fuel assemblies are performed. These measurements were carried out to test calculations models taking into account the influence of the grain structure on the effective resonance integral caused by the use of coated particles. Further the resonance overlap of these resonance absorber is examinated. It shows, that there is in general a good agreement between measurement and calculation. In addition to earlier investigations of the resonance absorption of Hafnium, investigations on the doppler effect on resonance absorption have been performed at temperatures up to 5000C. Calculation for the Hafnium resonance integral using the computer program GAROL with the modified set of resonance parameters show good agreement with the measurements. These calculations give also a way to determine the resonance integral for infinite dilution. (orig.)

Availability note (English)

MF available from INIS under the Report Number.

Abstract (German)

Es werden Messungen effektiver Resonanzintegrale an Brennstoffzonen kugelfoermiger HTR-Brennelemente durchgefuehrt. Sie werden mit Rechenmodellen, die den Einfluss der koernigen Struktur der coated particles auf das effektive Resonanzintegral beruecksichtigen, ueberprueft. Weiterhin werden Resonanzueberlappungseffekte der Resonanzabsorber untersucht. Die Berechnungen zeigen im allgemeinen eine gute Uebereinstimmung mit den experimentellen Ergebnissen. In Ergaenzung frueherer Arbeiten zur Resonanzabsorption von Hafnium werden hier experimentelle Untersuchungen bei hoeheren Temperaturen bis zu 5000C beschrieben. Vergleichende numerische Berechnungen mit Hilfe des Rechenprogramms GAROL unter Verwendung des modifizierten Parametersatzes ergeben gute Uebereinstimmung mit dem Experiment. Darueber hinaus wird mittels dieser Rechnungen eine einfache Methode zur Bestimmung des RI unendlich aufgezeigt. (orig.)

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Additional details

Additional titles

Original title (German)
Experimentelle Ueberpruefung von Modellen und Daten zur Beschreibung der Resonanzabsorption in HTR-Brennstoffanordnungen

Publishing Information

Imprint Pagination
81 p.
Report number
Juel--1459

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
9383639
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Resource subtype / Literary indicator
Thesis
Descriptors DEI
COMPARATIVE EVALUATIONS; COMPUTER CALCULATIONS; DOPPLER COEFFICIENT; G CODES; HAFNIUM 177; HAFNIUM 178; HAFNIUM 179; HTGR TYPE REACTORS; PERFORMANCE TESTING; RESONANCE ABSORPTION; RESONANCE INTEGRALS; THORIUM; URANIUM; Z CODES
Descriptors DEC
ABSORPTION; ACTINIDES; COMPUTER CODES; ELEMENTS; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; GAS COOLED REACTORS; GRAPHITE MODERATED REACTORS; HAFNIUM ISOTOPES; INTEGRALS; INTERMEDIATE MASS NUCLEI; INTERNAL CONVERSION RADIOISOTO; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; METALS; NUCLEI; RADIOISOTOPES; REACTIVITY COEFFICIENTS; REACTORS; SECONDS LIVING RADIOISOTOPES; STABLE ISOTOPES; TESTING

Optional Information

Notes
28 figs.; 7 tabs.; 38 refs.