NSUF 17-1091: Characterize the Irradiated Microstructure and Understand the Fission Product Behavior in an Irradiated and Safety Tested AGR-1 TRISO Fuel Particle New Proposal

TRISO-coated particle fuel is a center piece in developing the high temperature gas reactor, and the post-irradiation characterization is highly desired for improving the knowledge in understanding the fuel performance at normal and accident conditions and for providing qualification data and pathway in further improving the fuel fabrication process. In this proposal, it is planned to examine the TEM lamellae already prepared from the UCO kernel of a selected AGR-1 fuel particle, which was irradiated to burnup of 18.6 FIMA in ATR and subsequently safety tested at 1600C. The APT tips will be selectively prepared from the areas of interest and features identified by TEM if possible, otherwise similar areas will be identified in the cross sectioned TRISO mount for the APT tip fabrication. The combination of TEM characterization (Z-contrast imaging, EDS spectral mapping, diffraction, and EELS analysis) and APT studies is aimed to fully characterize the irradiated microstructure and to determine the elemental concentrations and crystalline structures of the unknown phases and isolated precipitates. The project PI is fully committed to meet the NSUF required research schedule and deliverable expectations.

Additional Info

Field	Value
Abstract	TRISO-coated particle fuel is a center piece in developing the high temperature gas reactor, and the post-irradiation characterization is highly desired for improving the knowledge in understanding the fuel performance at normal and accident conditions and for providing qualification data and pathway in further improving the fuel fabrication process. In this proposal, it is planned to examine the TEM lamellae already prepared from the UCO kernel of a selected AGR-1 fuel particle, which was irradiated to burnup of 18.6 FIMA in ATR and subsequently safety tested at 1600C. The APT tips will be selectively prepared from the areas of interest and features identified by TEM if possible, otherwise similar areas will be identified in the cross sectioned TRISO mount for the APT tip fabrication. The combination of TEM characterization (Z-contrast imaging, EDS spectral mapping, diffraction, and EELS analysis) and APT studies is aimed to fully characterize the irradiated microstructure and to determine the elemental concentrations and crystalline structures of the unknown phases and isolated precipitates. The project PI is fully committed to meet the NSUF required research schedule and deliverable expectations.
Award Announced Date	2017-09-20T12:37:28.083
Awarded Institution	None
Facility	None
Facility Tech Lead	Yaqiao Wu
Irradiation Facility	None
PI	Yong Yang
PI Email	[email protected]
Project Type	RTE
RTE Number	1091