b'Figure 3. Scale representation of Big-BEAST and Little-BEAST optionswere predicted. The test pins wereresults demonstrate that it should shown to have minimal thermalbe feasible to irradiate BEAST in neutron flux, a strong fast flux,the NEFT from a thermal-hydraulic and to achieve prototypic linearperspective. Future modeling is heating rates ranging from 300-400needed to optimize the design W/cm. The heat rate in the boosterfurther and explore other irradiation fuel was found to significantlypositions such as ATRs smaller flux decrease with each ring toward thetraps (south or east flux traps). It is experiment center showing that itpresumed that the NEFT option will converts most of thermal neutronsbe ideal since it can accommodate to fission reactions. more booster fuel, thicker thermal A finite element analysis modelneutron filters, and more test developed using Abaqus was utilizedspecimens (Big-BEAST). The NEFT, to provide preliminary temperaturehowever, it is a hotly contested predictions. Simple hand calculationsposition among ATR users and estimated the hydraulic characteristicsforthcoming studies will determine of BEAST and showed that totalif other flux traps will be adequate flow through the test is within the(Little-BEAST).flow limit currently imposed by ATR (~500 gpm). These preliminary 162 2022|AFC ACCOMPLISHMENTS'