PEP-II DND Engineering Planning

PEP-II DND Engineering Planning S. DeBarger Accelerator Systems Division SLAC Annual Program Review

Overview • Minimal Maintenance State • Requirements for Minimal Maintenance State • MMS Recommendations from August 2007 • Present State of PEP • PEP-II Disassembly • PEP-II Disassembly Requirements • Demolition & DisposalRecommendations from August 2007 • BaBar Disassembly Effort SLAC Annual Program Review

Requirements for Minimal Maintenance State Taken from S. Ecklund presentation “PEP-II Minimal Maintenance State Upkeep” from 6 Aug 2007 • Preserve PEP-II Components for potential new use. • Control environment • Fire • Water • Physical damage from earthquake, etc. • Theft • Unauthorized use • Store Components in a Safe manner • Control access to any residual radiation • Ensure Stored Energy Hazards are controlled • Monitor state of components • Maintain a clean environment SLAC Annual Program Review

A thorough database of all the equipment in the B-Factory, complete with each item's specs and descriptions, is needed in preparation for eventual disassembly. Each piece of equipment must have its future potential uses contained in the data base since different future uses will each have different funding needs. The data base should be used for rolling up costs. In addition, the lab had identified several classes of equipment that were valuable and required special handling and consideration. These details should be provided in the data base. ES&H activities in the ramp down and MMS phases must be discussed explicitly in the lab's plans and their costs should be estimated. The related funding needs stated in the White Paper are underestimated and should be restated, and SLAC and the DOE should plan for additional money. In order to plan the ramp down stage, the purpose and goals of the MMS should be stated more clearly. The lab should prepare plans which incorporate different assumptions for the length of the MMS, including the option of deleting the MMS entirely. These plans should include cost estimates so that decisions on what scenario is optimal can be made based on budget realities. Detailed information on all PEP magnets (HER, LER, & Injection) collected in Excel files by N. Li. These files are available for the use by interested parties. This effort has not been extended to other components. (covered in J. Seeman talk) (covered in J. Seeman talk) MMS Recommendations from August 2007 SLAC Annual Program Review

Fire Protection • All fire protection systems remain active • Inspections of fire extinguishers in progress SLAC Annual Program Review

Water Systems • PR04 RF_PRES90 psi → 64 psi • PR04 RF_FLOW950 gpm → 770 gpm • PR04 KLY_PRES185 psi → 61 psi • PR04 KLY_FLOW1200 gpm → 665 gpm • PR04 HCS_PRES57psi → 43 psi • PR04 HCS_FLOW1111 gpm –> 865 gpm • PR08 KLY_PRES195 psi → 158 psi • PR08 KLY_FLOW1080 gpm → 760 gpm • PR12 RF_PRES • 131 psi → 102 psi • PR12 RF_FLOW1085 gpm → 925 gpm • PR12 KLY_PRES211 psi → 55 psi • PR12 KLY_FLOW2185 gpm → 1020 gpm • PEP-II has 13 separate water systems. • Only 6 systems have multiple pumps. • Have reduced all systems to a single pump. SLAC Annual Program Review

PEP LCW within BaBar • Secure and drain LCW from PEP systems to prevent damage to BaBar from leaks in an infrequently monitored system. A view of some of the PEP LCW connections located in the BaBar backward tunnel SLAC Annual Program Review

Tunnel Security • Using PEP PPS system to secure tunnels • Opening doors to permit scheduled activities • Activity authorization from Area Manager (K. Burrows) • Returning to Controlled Access at the end of each day. • IR-2 doors secured with locks provided by BaBar group. • Access to IR-2 is coordinated with BaBar group and PEP-II Area Manager SLAC Annual Program Review

Monitoring of PEP-II Accelerator Housing • Area Manager performing regular walk-throughs. • Lighting systems being maintained. • Water seepage controlled • Seepage from ceilings diverted away from equipment • Water which collects in sumps is pumped to temporary storage, where it is tested and released into the sanitary sewer. • Video recording of PEP beamline components made following shutdown in April 2008. SLAC Annual Program Review

Radiological Controls • PEP tunnel surveyed following the end of PEP operations. All areas downposted to Radiologically Controlled Area (< 5 mR/h) with one exception. • HER Tune-Up Dump is a posted Radiation Area (70 mR/h @ 30 cm). • Contamination Areas posted at HER Tune-Up Dump and HER Abort Dump • Lead blanket installed at HER Tune-Up Dump to reduce radiation level in immediate vicinity. • All materials removed from the accelerator housing are surveyed and tagged by Radiation Protection Field Operations. SLAC Annual Program Review

Control System • SLAC Control Program (SCP) remains up and operational. • Distributed elements (Micros, CAMAC racks & modules, etc.) remain in place for now. • Support is limited by parts availability and loss of institutional expertise. • Some items may be redeployed elsewhere at SLAC. SLAC Annual Program Review

Power Supplies • PEM has applied administrative locks on 83 circuit breakers in PEP-II. • Details can be found in PEM electronic logbook & in 9 April 2008 email from S. Ratkovsky to K. Burrows with subject “PEP Breaker List”. • SLAC electricians have opened all PEP RF High Voltage Power Supply 12.47 kV switches. • SLAC electricians have opened all chopper bulk power supply 480 VAC Siemens breakers. SLAC Annual Program Review

Vacuum Systems • Venting of HER and LER vacuum systems began on2 Jul 08. • Venting is performed by MFD Vacuum as low priority work when technician support is available. • Venting sequence detailed in 3 Jun 08 email fromS. DeBarger to D. Bostic with subject “Sequence for Venting of PEP Rings”. SLAC Annual Program Review

PEP-II Disassembly Requirements • Indentify and preserve equipment with value to future projects. • Magnets • RF system (HVPS, klystrons, waveguide, cavities, …) • Vacuum components (pumps, gauges, controllers, power supplies, valves, …) • DC power supplies • PPS Keybanks • Properly dispose of items which do not have application to future projects. • Cable plant • Obsolete electronics • Vacuum chambers • Maintain a safe and clean environment in PEP tunnels, Interaction Region and other support buildings. • Fire protection • Lighting • 120V AC power distribution • Door security SLAC Annual Program Review

Planning for demolition and disposal should begin in FY 2008, even if, as described in the SLAC plans, it would begin around 2014 and last approximately 4 years. This planning will require extra funding from the DOE. SLAC has little experience in several of the demolition and disposal projects and they will either need to learn more relevant skills quickly, hire additional personnel, or outsource some activities to qualified specialized companies to succeed. Once the ramp down is complete, the reviewers believe that it would be best for the BaBar detector and PEP-II equipment to be disassembled as soon as possible by the physicists, engineers and staffers who are on site now and have detailed knowledge of the B-Factory… Planning for demolition and disposal has been impacted by the FY 2008 budget. Additional funding for demolition & disposal planning is expected in FY 2009. Laboratory reorganization effortshave delayed the assignment or hiring of personnel with demolition and disposal experience until FY 2009. A reduced demolition and disposal scope eliminates the need for some of the described demolition experience. BaBar is planning disassembly activities that will begin in the current calendar year (covered in W. Wisniewski talk). Those PEP-II items which interfere with the disassembly of BaBar will be removed. Demolition & DisposalRecommendations from August 2007 SLAC Annual Program Review

The disassembly projects will need local project managers as well as a Federal Project Director. An activities timeline and spending profile are vital parts of such planning and the lab should prepare such documents and have them reviewed by the OHEP. Detailed bottoms up cost estimates for both the BaBar detector and PEP-II equipment disassembly projects will be essential and the rough estimates presented at the review, especially in the case of PEP-II, should be replaced. Handling and movement of equipment from the interaction regions which might be activated will required special care and planning. Any movement of such pieces of equipment must be done in a way that satisfies the restrictions of the metals moratorium, as discussed at the review … As disassembly projects are initiated, appropriate project managers will be identified. An activities timeline and spending profile will be prepared once the scope of disassembly project is determined. The cost estimate for the disassembly of BaBar has been revised. Cost estimates for PEP-II disassembly will be prepared when the scope of that disassembly is defined (after the component allocation is determined). Material handling will be accomplished with the help of SLAC’s Radiation Protection and Environmental Protection Departments. This is already being done in the case of the BaBar disassembly work. Demolition & DisposalRecommendations from August 2007 SLAC Annual Program Review

All of the demolition and disposal activities would have to be coordinated with the lab steward, OBES. They would have to be mindful of other developments and projects at the lab and plans for equipment and space that go beyond the needs and interests of the OHEP. Some of the demolition and disposal activities are beyond the scope of the OHEP. These include the final stage of demolition and disposal of the PEP-Il tunnel and a consideration of the final condition of the soil and waste at the lab site... Since many of the activities in the demolition and disposal phase involve activated materials that would be impacted by the state of the metals moratorium, the state of that directive must be integrated into the planning scenarios… Demolition and disposal of PEP will get lab-wide concurrence before proceeding. Current guidance is that the PEP tunnel as well as the Interaction Regions and other support buildings have enough usefulness to possible future programs that demolition is not being contemplated at the moment. The impact of the metals moratorium and suspension is being integrated into planning scenarios. Demolition & DisposalRecommendations from August 2007 SLAC Annual Program Review

Support of BaBar Disassembly Effort • BaBar disassembly will require the removal of PEP-II components which run through, or are in the immediate proximity of, the BaBar detector. • Support tube (central beampipe, B1 &Q1 magnets) • Forward Raft (Q2, Q4, & Q5 magnets) • Backward Raft (Q2, Q4, & Q5 magnets) • Luminosity chamber • 10-m collimator • One (of three) Low Pressure Vacuum Chamber • This will require Accelerator Systems engineering support develop a schedule, check and revise procedures, and certify fixtures and tooling. • Preliminary goal is to complete removal of these PEP-II items by the end of March 2009. SLAC Annual Program Review

PEP-II Disassembly at BaBar BaBar doors opened, cables and services disconnected to permit access SLAC Annual Program Review

PEP-II Disassembly at BaBar Forward Raft Removed SLAC Annual Program Review

PEP-II Disassembly at BaBar Carbon fiber center section encloses SVT SLAC Annual Program Review

Conclusions • Present activities are aligned with the requirements for the Minimal Maintenance State. • Planning for disassembly of PEP has made minmal progress due to • Pending decisions on future use of PEP components • Lack of funding and low priority compared with other laboratory programs. SLAC Annual Program Review

PEP-II DND Engineering Planning