– filling the facility with concrete – of the 235-F building, where Plutonium-238 was processed into fuel pellets for space probes. About 400 grams of that nasty isotope remains in the building.
“235-F DEACTIVATION AND DECOMMISSIONING: INVENTORY AND SCENARIOS”
Summary
Facility inventory has a significant influence on the fate and transport modeling of 235-F. This memorandum details the proposed source inventory for 235-F for verification from 235-F Risk Reduction (see Tables 7 and 9) and specifies two scenarios that will be investigated using GoldSim and PORFLOW as follows:
• Grout the entire first floor (including the area directly below PuFF cells)
• Grout the entire first and second floors (including the area directly below PuFF cells).
memo linked here:
https://sti.srs.gov/fulltext/SRNL-L3200-2019-00049.pdf