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Independent Oversight Followup Review, Idaho National Laboratory - May 2011

May 2011

Idaho National Laboratory Fuel Conditioning Facility Safety Basis Review Followup

The purpose of this follow-up review was to verify how and to what extent Idaho National Laboratory (INL) addressed the Significant Issues that were identified in the April 2010 Independent Oversight report on the INL Fuel Conditioning Facility (FCF) safety basis review, as well as the consideration given to the recommendations that were made. Significant Issues were defined in that report as problems or concerns that affected the validity of the FCF safety basis documentation. The Office of Health, Safety and Security (HSS) fulfilled this objective by reviewing the draft Safety Analysis Report (SAR) for the FCF, technical safety requirements (TSRs), and supporting documentation revisions.

The revisions INL made to the SAR, TSR, and supporting documents appropriately address the Significant Issues identified by Independent Oversight and resolve most of the underlying concerns. INL prepared a new document to describe the accident scenarios, developed a significant new calculation to address cadmium releases, substantially revised the source term and consequence analyses for the pyrophoric fires resulting from loss of argon confinement, and revised the TSRs to more closely capture the assumptions made in the analyses.