Assessment of the potential for ferrocyanide propagating reaction accidents

The risk posed by the continued storage of ferrocyanide wastes in Hanford Site underground storage tanks has been studied extensively using theoretical analyses, laboratory experiments,tank monitoring, and waste sampling. This report provides an assessment of this hazard and provides the technical basis to resolve the Ferrocyanide Safety Issue for the 18 tanks, and supports the removal of these tanks from the Watch List. Based on the assessment provided in this report, the ferrocyanide waste in all 18 of the current ferrocyanide Watch List tanks, is categorized as safe and cannot burn or explode