April 12 2018
From: "Edward Daly" <edaly@jlab.org> To: "Nusair Hasan" <hasan@jlab.org>, "Joe Wilson" <jwilson@jlab.org>, "Kevin Jordan" <jordan@jlab.org>, "Joe Gubeli" <gubeli@jlab.org>, "James Henry" <jhenry@jlab.org>, "Keith Harding" <kharding@jlab.org>, "Joshua Armstrong" <ajoshua@jlab.org>, "Matt Marchlik" <marchlik@jlab.org> Cc: "Kelly Dixon" <kdixon@jlab.org>, "Jonathan Creel" <creel@jlab.org>
Sent: Thursday, April 12, 2018 4:53:26 PM
Subject: Note from LERF Cryo System Mtg - 12APR2018
Dear All,
Here are notes from the meeting:
- Jim provided a description of the system. Josh and Keith described details of their systems.
- Need to add tee for 3 atm He supply; consider adding isolation at LERF vault for the 3 atm warm He line. Nusair to check where 3 atm warm He supply line can be isolated in CHL. Kevin will check in the LERF.
- P&ID needs to be signed.
- Warm gas flow maximum is 3 g/s.
- Use a bellows sealed manual valve for cooldown line. Nusair to provide part number.
- Cryo recommends a relief valve that has guard vacuum for the cooldown line. This requires a change to the P&ID. Cryo has a design for the guard vacuum relief valve drawing. Nusair to provide to Keith.
- Relief system on Cryo Can includes two ASME stamped reliefs.
- Guard vacuum line has all-metal valve to isolate the wall lines from the Cryo Can and CM.
- Remove valve and tee from guard vacuum line. Guard vacuum will be at atmospheric when connection between Cryo Can and transfer lines. (Keith)
- We reviewed some of the comments from the 15-Mar email.
- Need to consider how to manage the heat from the cryomodules during steady state operation.
- Pumpdown control will need to use the heaters.
- Ensure no interferences with the dummy beam pipe. (Jim)
Need to plan a future meeting to review P&ID and detailed operational procedures.
Please let me know if there are any corrections.
Thanks,
Ed