NSUF 19-2893: Understand the Fission Products Behavior in UCO Fuel Kernels of safety tested AGR2 TRISO Fuel Particles by Using Titan Themis 200 with ChemiSTEM Capability

TRISO fuel is considered for multiple applications including high temperature gas reactors, small modular reactors and accident tolerant fuel for Light water reactors. The post-irradiation characterization is highly desired for improving the knowledge in understanding the fuel performance at normal and accident conditions. Providing a qualification data and a pathway for further improvement of the fuel fabrication process for new generation advanced gas reactors, are additional key objectives. In this proposal, we plan to quantify the metallic fission product and determine the fission products crystal structure by using FEI Titan with ChemiSTEM. The proposed TEM work are aimed to complement our previously acquired knowledge using the Tecnai F20, particularly for quantifying the Pd rich fission products and determine the atomistic structures of previously identified intermetallic fission products. The anticipated project outcomes will significantly improve our knowledges in the fuels’ microstructural and elemental evolutions upon different fuel fabrication variants. The project PI is fully committed to meet the NSUF required research schedule and deliverable expectations.

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Abstract	TRISO fuel is considered for multiple applications including high temperature gas reactors, small modular reactors and accident tolerant fuel for Light water reactors. The post-irradiation characterization is highly desired for improving the knowledge in understanding the fuel performance at normal and accident conditions. Providing a qualification data and a pathway for further improvement of the fuel fabrication process for new generation advanced gas reactors, are additional key objectives. In this proposal, we plan to quantify the metallic fission product and determine the fission products crystal structure by using FEI Titan with ChemiSTEM. The proposed TEM work are aimed to complement our previously acquired knowledge using the Tecnai F20, particularly for quantifying the Pd rich fission products and determine the atomistic structures of previously identified intermetallic fission products. The anticipated project outcomes will significantly improve our knowledges in the fuels’ microstructural and elemental evolutions upon different fuel fabrication variants. The project PI is fully committed to meet the NSUF required research schedule and deliverable expectations.
Award Announced Date	2019-09-17T14:48:12.977
Awarded Institution	Center for Advanced Energy Studies
Facility	Microscopy and Characterization Suite
Facility Tech Lead	Alina Zackrone, Yaqiao Wu
Irradiation Facility	None
PI	Yong Yang
PI Email	[email protected]
Project Type	RTE
RTE Number	2893