Multichannel Model for Relocation of Molten Fuel Cladding in Unprotected Loss-of-Flow Accidents in Liquid-Metal Fast Breeder Reactors

1979 ◽  
Vol 69 (2) ◽  
pp. 297-318 ◽  
Author(s):  
M. Ishii ◽  
W. L. Chen ◽  
M. A. Grolmes
Keyword(s):  
Liquid Metal ◽  
Fuel Cladding ◽  
Fast Breeder Reactors ◽  
Breeder Reactors

scholarly journals Features of methods for monitoring the fuel cladding tightness in lead-cooled fast breeder reactors

2021 ◽  
Vol 7 (4) ◽  
pp. 319-325
Author(s):  
Anastasiya V. Dragunova ◽  
Mikhail S. Morkin ◽  
Vladimir V. Perevezentsev
Keyword(s):  
Liquid Metal ◽  
Fission Products ◽  
General Description ◽  
Fuel Cladding ◽  
Reactor Plant ◽  
Reactor Unit ◽  
Basic Principles ◽  
Gaseous Fission ◽  
Breeder Reactors ◽  
Fuel Elements

To timely detect failed fuel elements, a reactor plant should be equipped with a fuel cladding tightness monitoring system (FCTMS). In reactors using a heavy liquid-metal coolant (HLMC), the most efficient way to monitor the fuel cladding tightness is by detecting gaseous fission products (GFP). The article describes the basic principles of constructing a FCTMS in liquid-metal-cooled reactors based on the detection of fission products and delayed neutrons. It is noted that in a reactor plant using a HLMC the fuel cladding tightness is the most efficiently monitored by detecting GFPs. The authors analyze various aspects of the behavior of fission products in a liquid-metal-cooled reactor, such as the movement of GFPs in dissolved and bubble form along the circuit, the sorption of volatile FPs in the lead coolant (LC) and on the surfaces of structural elements, degassing of the GFPs dissolved in the LC, and filtration of cover gas from aerosol particles of different nature. In addition, a general description is given of the conditions for the transfer of GFPs in a LC environment of the reactor being developed. Finally, a mathematical model is presented that makes it possible to determine the calculated activity of reference radionuclides in each reactor unit at any time after the fuel element tightness failure. Based on this model, methods for monitoring the fuel cladding tightness by the gas activity in the gas volumes of the reactor plant will be proposed.

Evolution of Sodium Technology R&D Actions Supporting French Liquid-Metal Fast Breeder Reactors

2005 ◽  
Vol 150 (1) ◽  
pp. 3-15 ◽  
Author(s):  
G. Rodriguez ◽  
F. Baque ◽  
J. C. Astegiano
Keyword(s):  
Liquid Metal ◽  
Fast Breeder Reactors ◽  
Breeder Reactors

Design of Material Strength Test in Lead-Bismuth Flow

2002 ◽  
Author(s):  
Masatoshi Kondo ◽  
Koji Hata ◽  
Minoru Takahashi
Keyword(s):  
Heavy Metals ◽  
Liquid Metal ◽  
Strength Test ◽  
Circulation Loop ◽  
Material Strength ◽  
Chemical Characteristics ◽  
Liquid Lead ◽  
Fast Breeder Reactors ◽  
Breeder Reactors ◽  
Physical And Chemical

Liquid lead and lead-bismuth have drawn the attention as one of the candidate coolants of the fast breeder reactors (FBRs), and the accelerator driven transmutation systems (ADSs). In order to use the coolant to the systems, the physical and chemical characteristics of the heavy metals are necessary. This plan has been proposed for the strength test of materials in the liquid metal surroundings. The lead-bismuth circulation loop with the strength test has been designed, and the strength test of candidate materials has been planned.

Sign in / Sign up

Export Citation Format

Share Document