FISSION PRODUCT DISTRIBUTION IN FAST REACTOR OXIDE FUELS.
The reference design of fuel pins for the Prototype Fast Reactor (PFR) has an internal diameter of only 5.08 mm, but center temperatures in excess of 2000 deg C and average radial temperature gradients of almost 1000 deg C/mm are to be expected. These steep temperature gradients provide large driving forces for migration of the various species present and the high temperature of much of the fuel should lead to high mobilities for many species. Extensive redistribution of some fission products is to be expected. Results obtained at Dounreay by post-irradiation examination of fuel pins irradiated in the Dounreay Fast Reactor (DFR) as part of the PFR fuel development program are described. 14 references. (auth)
- Research Organization:
- United Kingdom Atomic Energy Authority, Dounreay (Scotland). Reactor Group
- NSA Number:
- NSA-27-013990
- OSTI ID:
- 4625487
- Report Number(s):
- NP--19599
- Country of Publication:
- United Kingdom
- Language:
- English
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