Feb 7 2018
Weekly Reporting
Week of November 16 - 22, 2017
Issues:
None
Accomplishments this week:
15 (of 16) SSAs have been moved to LERF gallery. Personnel Safety System (PSS) wiring is in progress in Zone 3, AC power is being run to SSAs.
Waveguide installation has begun, 100’s of feet have been hung & is moving forward.
Spreadsheet for all cryomodule to rack connections is in progress. Rack nomenclature has been work out. Racks and SSAs have been labeled
All connectors for CMs have arrived as well as some of the cable. A spreadsheet for routing of each of the cables from CM to rack is progressing well.
Radiation assessment is complete and found that a 3’ wall is sufficient shielding. The external shield blocks are 4’ cubes, my thought was that all 27 were way overkill… The first test cycle will have all 27 blocks installed with TLD radiation monitors at the joints in the first row (of the two rows) of the blocks. These will be analyzed for actual (total) dose. We will not build any movable shielding in the vault, and in fact the difference in time to move 12 vs 27 blocks may not be a significant cost difference. https://wiki.jlab.org/lerf/index.php/File:LERF_TRUCK_ENTRANCE_SHIELDING.pdf