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Title: New aspects in the analysis of loss-of-flow transients for homogeneous and heterogeneous LMFBR cores

Abstract

This paper presents the results of analyses of unprotected loss-of-flow (LOF) transients which have been performed to date using the new SAS4A code system. Accident histories for homogeneous and heterogeneous demo-sized cores (300 MWe) are compared and emphasis is placed on phenomena occurring after the initiation of fuel motion as described by LEVITATE. LEVITATE is the SAS4A model for the analysis of fuel and cladding dynamics under loss-of-flow (LOF) conditions and is believed to be the most-sophisticated computational tool currently available for fuel-motion analysis. The results of this analysis indicate that the initiation phase of an unprotected loss-of-flow accident has a considerably lower energetics potential in a heterogeneous core than in a homogeneous core. The difference is larger than previously indicated by SAS3D. Better phenomenological models implemented in SAS4A provide increased confidence in this aspect of safety evaluation of LMFBR cores.

Authors:
;
Publication Date:
Research Org.:
Argonne National Lab., IL (USA)
OSTI Identifier:
6194524
Report Number(s):
CONF-820704-48
ON: DE83009491
DOE Contract Number:  
W-31-109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: International topical meeting on LMFBR safety, Lyon, France, 18 Jul 1982
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; LMFBR TYPE REACTORS; LOSS OF FLOW; HEAT TRANSFER; HYDRAULICS; COMPUTER CALCULATIONS; FUEL ELEMENT FAILURE; FUEL PINS; REACTOR CORES; REACTOR SAFETY; ACCIDENTS; BREEDER REACTORS; ENERGY TRANSFER; EPITHERMAL REACTORS; FAST REACTORS; FBR TYPE REACTORS; FLUID MECHANICS; FUEL ELEMENTS; LIQUID METAL COOLED REACTORS; MECHANICS; REACTOR ACCIDENTS; REACTOR COMPONENTS; REACTORS; SAFETY; 220900* - Nuclear Reactor Technology- Reactor Safety; 210500 - Power Reactors, Breeding

Citation Formats

Tentner, A M, and Wider, H U. New aspects in the analysis of loss-of-flow transients for homogeneous and heterogeneous LMFBR cores. United States: N. p., 1982. Web.
Tentner, A M, & Wider, H U. New aspects in the analysis of loss-of-flow transients for homogeneous and heterogeneous LMFBR cores. United States.
Tentner, A M, and Wider, H U. Fri . "New aspects in the analysis of loss-of-flow transients for homogeneous and heterogeneous LMFBR cores". United States. https://www.osti.gov/servlets/purl/6194524.
@article{osti_6194524,
title = {New aspects in the analysis of loss-of-flow transients for homogeneous and heterogeneous LMFBR cores},
author = {Tentner, A M and Wider, H U},
abstractNote = {This paper presents the results of analyses of unprotected loss-of-flow (LOF) transients which have been performed to date using the new SAS4A code system. Accident histories for homogeneous and heterogeneous demo-sized cores (300 MWe) are compared and emphasis is placed on phenomena occurring after the initiation of fuel motion as described by LEVITATE. LEVITATE is the SAS4A model for the analysis of fuel and cladding dynamics under loss-of-flow (LOF) conditions and is believed to be the most-sophisticated computational tool currently available for fuel-motion analysis. The results of this analysis indicate that the initiation phase of an unprotected loss-of-flow accident has a considerably lower energetics potential in a heterogeneous core than in a homogeneous core. The difference is larger than previously indicated by SAS3D. Better phenomenological models implemented in SAS4A provide increased confidence in this aspect of safety evaluation of LMFBR cores.},
doi = {},
url = {https://www.osti.gov/biblio/6194524}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {1}
}

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