A newly released Department of Energy assessment of the criticality accident alarm system at the Y-12 nuclear weapons plant said the operation is “adequately” maintained, but the review team identified two “deficiencies” that raised uncertainty as to whether the system will fully function as planned.
A nuclear criticality accident is an uncontrolled nuclear chain reaction with release of dangerous levels of radiation. Such an accident is Y-12’s biggest fear because of the huge volume of fissionable material — highly enriched uranium — that is stored and processed at the Oak Ridge plant. The only criticality accident in Y-12 history occurred June 16, 1958, and eight workers were hospitalized with severe doses of radiation. (Accident scene is pictured, right.)
The new assessment was conducted earlier this year, and it included a review of the alarm components in four Y-12 facilities — Buildings 9212, Beta-2E, 9215 and 9720-5 — that are involved in the handling of enriched uranium. Continue reading →