2017 | AFC ACCOMPLISHMENTS 34 High resolution optical microscopy in HFEF Postirradiation examination of the Advanced Test Reactor (ATR) irradiated Accident Tolerant Fuel (ATF) concepts continues at the Idaho National Laboratory Hot Fuel Examination Facility (HFEF).The metallography hot cell station was updated with a new high resolution microscope. Figure 1. High resolution 1000x image with precipitates measurements down to the micrometer range in metallic fuel from AFC-4A. Project Description: This new capability will support both the AccidentTolerant Fuel portion and the Advanced Reactor Fuel portion of AFC. A variety of different irradiation tests designed to provide data on several different potential ATF and ARF concepts have already been examined with this new capability. Optical