b'the glovebox wall/window with an optical camera with no image magnification. No gross changes in geometry were detected, however a likely fuel failure was seen inthe SETH-I rodlet that will befurther investigated.Accomplishments: Nuclear fuel safety criteria for RIA events are generally reported in terms of a peak radial average enthalpy or a change in peak radial average enthalpy. For the current LWR fuel design, the initial enthalpy limit for fuel rods consisting of UO 2pellets incased in a Zircaloy cladding were established in 1974 and published in the Atomic Energy Commission (AEC) Regulatory Guide 1.77 [3]. Initially, a limit was set to 1170 J/g UO 2radial average fuel enthalpy for both fresh and irradiated fuel based on the maintenance of rod-like (coolable) geometry. This enthalpy limit was based on a review of Special Power Figure 2. Seth F-I Postcontaining the fuel test specimensExcursion Reactor Test (SPERT) and Transient Images. were then transferred from TREAT toTREAT experimental data from the INLs Materials and Fuels Complex1960s. Leading on from the PBF (MFC) for disassembly and postexperimental program, testing transient examination. Capsulesof higher burnup fuels in the were disassembled in a shielded1980s and 1990s performed in nitrogen gas atmosphere gloveboxRussia, Japan, and France began to to minimize oxidation and furtheruncover PCMI as a new fuel failure degradation of the materials. Visualmechanism for fuels with extended examination was performed throughburnups. The current RIA fuel failure limits are inclusive of low 102 2020|AFC ACCOMPLISHMENTS'