ASME Columbia Basin Section: 2017 PUREX Tunnel Collapse – It's Predecessors and Aftermath

This technical presentation examines the 2017 radiological emergency at the Plutonium Extraction (PUREX) facility when Tunnel 1 partially collapsed, triggering a site-wide take-cover condition. Speaker Mike Maloof, who served as Design Authority for the failed equipment tunnels, will discuss the precursors to the collapse, immediate emergency response actions taken during the 36-hour recovery operation, and the overall assessment of this incident.