Author: Ralph O. Meyer
Publisher:
ISBN:
Category : Fission gases
Languages : en
Pages : 78

Get Book Here

Book Description

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

Get Book Here

Book Description
Fission gas release data are presented for five fuel rods irradiated at low fuel temperature (below 2700/sup 0/F) with burnups up to 90,000 MWD/MTM. Four of these rods contained ThO/sub 2/-UO/sub 2/ (33.6 weight percent UO/sub 2/) fuel pellets; the fifth rod contained ThO/sub 2/ pellets. These data supplement fission gas release information previously reported for 54 rods containing ThO/sub 2/-UO/sub 2/ and ThO/sub 2/ fuel, some of which experienced fuel temperaures up to 5000/sup 0/F and burnups to 56,000 MWD/MTM. These new data suggest that at burnups exceeding about 80,000 MWD/MTM a sharp increase in fission gas release occurs, possibly caused by microstructural changes in the fuel. This is similar to the behavior of UO/sub 2/ except that the increase occurs in UO/sub 2/ at lower burnup (approximately 40,000 MWD/MTM). The fission gas release calculational model previously reported has been modified to account for the observed increase in the low temperature component. The revised model provides a good best estimate of all the fission gas release data.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

Get Book Here

Book Description

Author: Atomic Energy of Canada Limited
Publisher: Chalk River, Ont. : Chalk River Nuclear Laboratories
ISBN:
Category :
Languages : en
Pages : 11

Get Book Here

Book Description

Author: Michael B. Weinstein
Publisher:
ISBN:
Category : Fission gases
Languages : en
Pages : 68

Get Book Here

Book Description
A sweep gas facility has been used to measure the release rates of radioactive fission gases from small UN specimens irradiated to 8-percent burnup at high fission-rate densities. The measured release rates have been correlated with an equation whose terms correspond to direct recoil release, fission-enhanced diffusion, and atomic diffusion (a function of temperature). Release rates were found to increase linearly with burnups between 1.5 and 8 percent. Pore migration was observed after operation at 1550 K to over 6 percent burnup.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 32

Get Book Here

Book Description

Author:
Publisher: Paris, France : Nuclear Energy Agency, Organisation for Economic Co-operation and Development
ISBN:
Category : Science
Languages : en
Pages : 572

Get Book Here

Book Description
Communicates the results of an international seminar which reviewed recent progress in the field of fission gas behaviour in light water reactor fuel and sought to improve the models used in computer codes predicting fission gas release. State-of-the-art knowledge is presented for both uranium-oxide and mixed-oxide fuels loaded in water reactors.

Author: T. J. Slosek
Publisher:
ISBN:
Category : Fission gases
Languages : en
Pages : 24

Get Book Here

Book Description

Author: Gilbert E. Raines
Publisher:
ISBN:
Category : Fission gases
Languages : en
Pages : 46

Get Book Here

Book Description

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

Get Book Here

Book Description
The steady state gas release, swelling and densification model previously developed for oxide fuels has been modified to accommodate the slow transients in temperature, temperature gradient, fission rate and pressure that are encountered in normal reactor operation. The gas release predictions made by the model were then compared to gas release data on LMFBR-EBRII fuels obtained by Dutt and Baker and reported by Meyer, Beyer, and Voglewede. Good agreement between the model and the data was found. A comparison between the model and three other sets of gas release data is also shown, again with good agreement.