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Independent Oversight Inspection, Savannah River Site - December 2009

December 2009

Inspection of Reinforced Concrete Construction at the Savannah River Site Mixed Oxide Fuel Fabrication Facility

The U.S. Department of Energy (DOE) Office of Independent Oversight conducted a nuclear safety inspection at the Mixed Oxide (MOX) Fuel Fabrication Facility (MFFF) construction project, focusing on construction quality, specifically for reinforced concrete, at the MFFF construction project. This purpose of the inspection was to provide mission support to site management in determining whether the facility structure is constructed in accordance with the applicable requirements.

The overall quality of concrete that has been placed in the MFFF to date is adequate. Essentially all of the concrete met specifications for temperature and slump at the time of placement, and the results of unconfined compression tests performed on cured concrete samples have consistently met or exceeded strength requirements. Placements not meeting specifications were documented on NCRs and dispositioned in accordance with the MOX Services QA program.

Sections 2 and 3 of this report discuss the key positive attributes and weaknesses, respectively, identified during this inspection. Section 4 presents the results of the Independent Oversight assessment of the manufacture, testing, and placement of reinforced concrete and related activities performed by MOX Services and its subcontractors. Independent Oversight’s conclusions regarding the quality of reinforced concrete construction at the MFFF are presented in Section 5, and opportunities for improvement for consideration by NNSA and MOX Services are presented in Section 6. Appendix A provides supplemental information, including team composition.  Appendix B presents a finding identified during this Independent Oversight inspection.