Department of Energy Mercury Chamber Considerations, July 2011 Beam Dump Gravity Drain Requires Flow Control • Bulk flow exits dump via overflow drains • Gravity drain intended to remain closed until end-of run, but this liquid becomes static • Decay heating requires gravity drain to have flow control Proton Beam Mercury Jet Gravity Drain Flow Control 4 Managed by UT-Battelle for the U.S. Department of Energy Mercury Chamber Considerations, July 2011 Mercury Overflow Overflow drains WC Shielding Mercury Chamber Basics • Chamber serves as both jet and beam dumps – Chamber must encompass the nozzle tip • No openings into chamber during operation – Mercury flows in a closed loop – Likely will be double-walled for mercury containment, possibly water cooled • No embedded sensors • Gravity drain of mercury required • Penetrations (ports) into chamber – Nozzle – Hg drains (overflow and maintenance) – Vents (in and out) – Beam windows (upstream and downstream) – Cooling? 5 Managed by UT-Battelle for the U.S. Department of Energy Mercury Chamber Considerations, July 2011 Simple Chamber – Overflow Drain Options Drain Slots Drain Pipes • Splash mitigation not shown • Size of drainage system outlets TBD Drain Chamber 6 Managed by UT-Battelle for the U.S. Department of Energy Mercury Chamber Considerations, July 2011 Mercury Chamber Ports • Chamber requires several ports • Sizes likely to increase due to remote handling requirements Vents (In/Out) Jet Nozzle Beam Pipe Maintenance Drain (Valved) 7 Managed by UT-Battelle for the U.S.