VinaR - Repository of the Vinča Nuclear Institute
    • English
    • Српски
    • Српски (Serbia)
  • English 
    • English
    • Serbian (Cyrilic)
    • Serbian (Latin)
  • Login
View Item 
  •   Vinar
  • Vinča
  • Doktorske teze
  • View Item
  •   Vinar
  • Vinča
  • Doktorske teze
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Improvements of the neutron leakage model in the calculational procedure of the critical conditions and the homogenized parameters of a nuclear reactor

Amelioration du modele de fuites de neutrons dans le schema de calcul des conditions critiques et des parametres homogeneises d'un reacteur nucleaire

No Thumbnail
Authors
Petrović, Ivan M.
Doctoral thesis
Metadata
Show full item record
Abstract
The new theoretical method, implemented in APOLLO-2 code as the TIBERE procedure, allows to take into account, the influence of assembly heterogeneity on neutron leakage This method lies on the heterogeneous B1 procedure; however this formalism, in its exact form, should lead to very complex calculations; but, assuming a small number of approximations, it is possible to reduce it to a formalism using only calculation tools very close to those existing in APOLLO-2 It is the purpose of the TIBERE model, which allows to define the leakage cross-sections as additional absorption cross-sections having a space and energy dependence, thus cell-consistent leakage rates can be defined in order to perform the whole core calculation The study of this refined heterogeneous leakage treatment was undertaken because of the insufficiency of the homogeneous leakage model, especially in cases when an assembly contains voided or almost voided zones, so that the streaming effect may become important The f...ission rate comparisons between the experimental results obtained from the series of experiments EPICURE where the water was substituted, in the central part of reactor, by aluminium in order to simulate void and the results of the whole reactor calculations were accomplished, where leakages were calculated by the classical (homogeneous) procedure and by the TIBERE (heterogeneous) procedure of APOLLO-2 code They prove that the heterogeneous treatment of leakage give results which lie on the whole closer to the experimental values In other words, the classical leakage procedure underestimates the depression in the zone with aluminium, due to streaming This new model could be used, of course, for PWR's with other types of fuel, and also for other types of reactors. (Author)

Source:
Universite de Paris-Sud - Centre d'Etudes de Saclay, Dept. de Mecanique et de Technologie (France), 1993, 147-
[ Google Scholar ]
URI
http://inis.iaea.org/search/search.aspx?orig_q=RN:25028908
http://vinar.vin.bg.ac.rs/handle/123456789/8548
Collections
  • Doktorske teze
Institution
Vinča

DSpace software copyright © 2002-2015  DuraSpace
About VinaR - Repository of the Vinča Institute of Nuclear Sciences | Send Feedback

OpenAIRERCUB
 

 

All of DSpaceInstitutionsAuthorsTitlesSubjectsThis institutionAuthorsTitlesSubjects

Statistics

View Usage Statistics

DSpace software copyright © 2002-2015  DuraSpace
About VinaR - Repository of the Vinča Institute of Nuclear Sciences | Send Feedback

OpenAIRERCUB