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4.4 Spent Deionization Resins for SLAC Closed -Loop Low -Conductivity <br />Cooling Water System <br />Site 12010 quantity Qb) <br />SLAC 300` <br />a. 300 lb of this waste was generated in 2010 under CWC 132 <br />Input Materials: <br />exchange resins and <br />Water <br />Debris with beryllium or <br />Resins withDnon�Ion <br />Experimental equipment <br />RCRA metals from <br />deionized water in contact <br />Off-site <br />and materials containing <br />Experimental Equipment <br />with copper piping/tubing <br />Process <br />beryllium or RCRA <br />(CWC Is <br />Repair/Upgrade and <br />FIGURE IIIA.4. DElON17ED COOLING WATER AND ION EXCHANGE RESIN WASTE PROCESS <br />FLOW DIAGRAM <br />metals <br />Hazardous Waste and Process Description <br />Ion exchange resins are installed in-line as part of SLAC's closed-loop, low -conductivity <br />cooling water (LCW) system. LCW is used to cool sections ofthe two-mile linear <br />accelerator and other research equipment. The LCW is initially produced from potable <br />water using a front-end deionization system and the ion exchange resins of this system <br />are recycled with an outside water services vendor. This closed-loop cooling system is <br />constructed of copper tubing and heat exchangers, releasing copper ions that are in tum <br />removed by the in-line ion exchange resins. In-line ion exchange resins are strategically <br />used to polish or remove copper ions from the LCW as it goes through the closed-loop <br />cooling system. The use of LCW and copper heat exchange equipment is essential to <br />controlling the operation of the accelerator and associated equipment. <br />The generation of spent ion exchange resins as a hazardous waste varies depending on <br />how long the resins were in service in an experimental area and the heat load placed on <br />the closed-loop cooling water system. Spent resins are generated from the operation of <br />the linear accelerator and other experimental equipment and may come from different <br />parts of the experimental facilities based on their availability for access and maintenance. <br />Some ion exchange resins in other areas of the experimental facilities may have a shorter <br />replacement cycle and so turn out to be non -hazardous. As a result, the generation of <br />spent resins is quite variable. <br />SLAC has also helped reduce the generation of this waste stream since the last 2006 by <br />more fully implementing a resin recycling program in which old resins are managed and <br />new resins are returned to SLAC by an outside vendor. <br />SOURCE REDUCTION/POLLUTION PREVENTION EVALUATION <br />Description of Measure: <br />No recommended reduction measures except to maintain equipment to maximize <br />_efficiency. <br />4.5 Experimental Equipment Repair/Upgrade and Removal Generating <br />Beryllium or RCRA Metals Waste (RCRA Contaminated Debris and Non - <br />Debris <br />Site 12010 quanti Ib <br />SLAC 1417 <br />Input Materials: <br />Debris with beryllium or <br />Experimental equipment <br />RCRA metals from <br />Off-site <br />and materials containing <br />Experimental Equipment <br />disposal <br />beryllium or RCRA <br />Repair/Upgrade and <br />metals <br />Removal (CWC 181) <br />FIGURE 111.4.5. REPAIRIUPGRADE AND REMOVAL OF EXPERIMENTAL EQUIPMENT AND <br />WASTE GENERATION FLOW DIAGRAM <br />Hazardous Waste and Process Descrigttion <br />Some experimental apparatus use beryllium copper alloys and some operational and <br />experimental activities generate small quantities of debris with other RCRA metals (other <br />than lead) to support electronic operations. <br />SOURCE REDUCTION/POLLUTION PREVENTION EVALUATION <br />Description of Measure: <br />No recommended source reduction measure. SLAC needs to continue to utilize good <br />waste segregation practices to reduce mixing non -hazardous waste with hazardous <br />waste. <br />September 1, 2011 SB 14 Plan 32 September 1, 2011 SB 14 Plan <br />