1. SPD-SWPF-0208 1 SALT WASTE PROCESSING FACILITY (SWPF) LESSONS LEARNED

2. SPD-SWPF-0208 2 HISTORY SWPF project initiated to provide radioactive salt waste decontamination capability necessary to support the liquid waste cleanup at SRS SWPF features caustic side solvent extraction and monosodium titanate adsorption and filtration for Cesium and actinide removal, respectively Using these extraction methods significantly reduces the material to be vitrified Parsons was chosen to design, build, commission, and operate the SWPF

3. SPD-SWPF-0208 3 DESIGN The preliminary safety analysis was consistent with DOE directives and guidance The conclusion was that primary confinement system and the central building structure warranted performance category 2 design criteria, i.e. PC-2 Exceeded local guidance for protection of the co-located worker

4. SPD-SWPF-0208 4 DNFSB DNFSB review concluded that protection of the co-located worker warranted use of PC-3 design criteria PC-3 invokes a increased level of conservatism in design and construction Extensive discussion ensued between the Department and the DNFSB The subjective nature of the safe harbor guidance made issue resolution difficult

5. SPD-SWPF-0208 5 PATH FORWARD After extensive discussions with the DNFSB, DOE decided to implement the recommended upgrades The design upgrades and associated construction increased the overall project cost and extended the schedule Parsons and DOE are working on the Enhanced Preliminary Design to incorporate the design upgrades Currently proceeding on track to CD-2

6. SPD-SWPF-0208 6 LESSONS LEARNED Keep stakeholders/regulators fully informed of critical decision points in the project and any associated issues and/or impacts Better coordination with all affected parties is necessary Objective criteria are warranted for determining worker protection and seismic design standards Issues need to be aggressively managed and resolved