Minutes and Action List of Sept 16 2019 ArgonCube2x2 Instalaltion Meeting
· Attendance: John, Jim, Gary, Min Jeong, Howard, Sai, Ting, Clarence and Steve
- Jim mentioned there is a switch on breaker box panel (PP-NMB-1-D1) for the Minerva DAQ
racks. We will use it to disconnect power to racks before decommissioning.
· We have some discussion on water target survey requirement. Howard mentioned we will likely need to survey the target from both downstream and upstream ends.
- Jim commented that the expansion of the water target is confined by the neighboring target while 100% filled -- the target may touch its neighbor targets. We need clarification on this.
- It will take 2 weeks to fill the target with water, survey and empty it
- Maybe we should the target off the current location before doing the detail survey.
- Need to discuss the work with Minerva collaboration and neutrino division management.
· Clarence gave a very detailed description of Minerva electronics disassembly. Here are some comments:
- There are a few PMT storage boxes in Whiteband building. We should find whether we need to move them to MINOS hall
- We need couple of storage cabinets in the MINOS hall to storage electronics boards, fibers and cables.
- There is a suggestion to separate works needs to be done on the lifter and works can be done on the floor
- We can also use some clarification on to inspect damaged fiber and cables in the procedure
- Looks like we can use a scissor lift loft instead of articular arm lifter for electronics disassembly work. We shall try both lifter type out
- Need to start write the hazard analysis for electronics disassembly work
· On electronics rack layout.
- Steve to find out the exact size of Minos and Minerva racks
- we need to access both front and back of the racks.
- We suggest to turn the rack side way and leave about 30" space between racks
- There are also posts on the west catwalk we need to get around.
- We also need to push the racks to be as close as possible to the catwalk guard rails so we have enough egress space on the catwalk
- Min Jeong is also rethinking of the location for the cryogenic condenser.
- Jim and Angela posted the decommissioning environmental review. John is working on updating the JHAs.
- Action list:
- Howard to finalize the requirement for water target survey
- Jim and Ting to find out the shipping method from Kevin McFarland for veto scintillator
- Clarence to finish the disassembly procedure incorporating comments
- Steve to find out rack size and space requirement at downstream end
- Gary to relocate the racks by turning them sideway and also add 30” gap between racks for opening door panels
- Gary to shorten the Minerva support rails to 5’ instead of 10’
- Gary to remove the gas TPC vessel and service station from the layout
- Steve to follow up the Minerva electrical disconnection procedure
- Ting, Jim and John to discuss technician need and availability
- Next meeting is Sept 30. We will focus on tasks for getting ready to start the decommissioning (listed below for reference)
Startup preparation for decommissioning in October
- JHAs, technician review, task code
- MSB, MINOS and tunnel clean up
- Strongback and steel cart inspection
- Minerva electrical disconnection
- transform to Minerva rack
- conduits on detector?
- Minerva electronic disassembly shifter
- phyicisits plus techs
- lifter training class arrangement
- Storage area for electronics:
- Storage cabinet in Minos?
- Other building like Lab 6?
- Shipping arrangement for Minerva veto scintillator
- Rochester to pay the shipping cost
- Container, packaging material
- Scrap material transfer
- railhead storage arrangemt
- free fermilab truck
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