scholarly journals LMFBR Operational and Experimental In-Core, Local-Fault Experience, Primarily With Oxide Fuel Elements

1983 ◽  
Vol 105 (3) ◽  
pp. 669-678 ◽  
Author(s):  
D. K. Warinner
Keyword(s):  
Oxide Fuel ◽  
Delayed Neutron ◽  
Failure Frequency ◽  
Fault Accommodation ◽  
Fuel Failure ◽  
Failure Propagation ◽  
Gaseous Fission ◽  
Gaseous Fission Product ◽  
Element Failure ◽  
Fuel Elements

Case-by-case reviews of selective world experience with severe local faults, particularly fuel failure and fuel degradation, are reviewed for two sodium-cooled thermal reactors, several LMFBRs, and LMFBR-fuels experiments. The review summarizes fuel-failure frequency and illustrates the results of the most damaging LMFBR local-fault experiences of the last twenty years, beginning with BR-5, and including DFR, BOR-60, BR2’s MFBS-and Mol-loops experiments, Fermi, KNK, Rapsodie, EBR-II, and Treat-D2. Local-fault accommodation is demonstrated and a need to more thoroughly investigate delayed-neutron and gaseous-fission-product signals is highlighted in view of uranate formation, observed blockages, and slow fuel-element failure-propagation.

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.

scholarly journals Behavior of mixed-oxide fuel elements during an overpower transient

1993 ◽  
Vol 204 ◽  
pp. 217-227 ◽  
Author(s):  
H. Tsai ◽  
L.A. Neimark ◽  
T. Asaga ◽  
S. Shikakura
Keyword(s):  
Mixed Oxide ◽  
Oxide Fuel ◽  
Mixed Oxide Fuel ◽  
Fuel Elements

Physicochemical interaction of oxide fuel with the cladding of the fuel elements of A fast reactor

1984 ◽  
Vol 56 (4) ◽  
pp. 207-212 ◽  
Author(s):  
V. A. Tsykanov ◽  
E. F. Davydov ◽  
E. P. Klochkov ◽  
V. K. Shamardin ◽  
V. N. Golovanov ◽  
...  
Keyword(s):  
Fast Reactor ◽  
Physicochemical Interaction ◽  
Oxide Fuel ◽  
Fuel Elements

Thermal opening of oxide fuel elements with zirconium cans

1973 ◽  
Vol 35 (5) ◽  
pp. 1008-1010
Author(s):  
A. T. Ageenkov ◽  
S. E. Bibikov ◽  
E. M. Valuev ◽  
G. P. Novoselov ◽  
V. F. Savel'ev
Keyword(s):  
Oxide Fuel ◽  
Fuel Elements
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