Methods and results of an investigation of the distribution of solid fission products in HTGR fuel elements

Atomic Energy ◽  
1992 ◽  
Vol 73 (2) ◽  
pp. 612-617
Author(s):  
A. I. Deryugin ◽  
A. S. Chernikov ◽  
B. P. Kolesnikov ◽  
K. N. Koshcheev ◽  
A. D. Kurepin
Keyword(s):  
Fission Products ◽  
Fuel Elements ◽  
Htgr Fuel

Irradiation behavior of pyrolytic silicon carbide

1983 ◽  
Vol 41 ◽  
pp. 72-73
Author(s):  
R. J. Lauf
Keyword(s):  
Silicon Carbide ◽  
Fission Products ◽  
Thermodynamics And Kinetics ◽  
Neutron Fluences ◽  
Fuel Particles ◽  
Sic Coatings ◽  
Irradiation Behavior ◽  
Kinetics Of ◽  
Htgr Fuel

Fuel particles for the High-Temperature Gas-Cooled Reactor (HTGR) contain a layer of pyrolytic silicon carbide to act as a miniature pressure vessel and primary fission product barrier. Optimization of the SiC with respect to fuel performance involves four areas of study: (a) characterization of as-deposited SiC coatings; (b) thermodynamics and kinetics of chemical reactions between SiC and fission products; (c) irradiation behavior of SiC in the absence of fission products; and (d) combined effects of irradiation and fission products. This paper reports the behavior of SiC deposited on inert microspheres and irradiated to fast neutron fluences typical of HTGR fuel at end-of-life.

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.

Matrix graphites for HTGR fuel elements. variants in production. properties. radiation behavior

Atomic Energy ◽  
1992 ◽  
Vol 72 (4) ◽  
pp. 324-330
Author(s):  
A. S. Chernikov ◽  
L. I. Mikhailichenko ◽  
V. A. Reshetnikov ◽  
A. S. Cherkasov ◽  
D. P. Mamii ◽  
...  
Keyword(s):  
Radiation Behavior ◽  
Fuel Elements ◽  
Htgr Fuel

Effect of the migration of fission products on measurements of burnup in fuel elements

1967 ◽  
Vol 23 (2) ◽  
pp. 817-818
Author(s):  
O. A. Miller ◽  
A. M. Demidov ◽  
B. S. Galakhmatova
Keyword(s):  
Fission Products ◽  
Fuel Elements

scholarly journals In-pile steam oxidation of model HTGR fuel elements

1979 ◽  
Author(s):  
S.H. Freid ◽  
H.J. de Nordwall ◽  
A.P. Malinauskas
Keyword(s):  
Steam Oxidation ◽  
Fuel Elements ◽  
Htgr Fuel
Sign in / Sign up

Export Citation Format

Share Document