System Status
• Level A of purifier below 75% via purifier overview HMI page
• PTA below 3 psig via purifier overview HMI page
• PT-110-N reading 50-65 psig via ODH HMI page
• Ensure EV-102-N and EV-105-N are closed via the ODH HMI page.
• LN2 Tank is above 10 inwc (If it is below 24 inwc, then follow the steps on ... page for a refill).
* Ensure HCV-13 is open: ask the Target Expert on shift whether it was changed recently.
* Note down the start time and the initial level for the elog entry.
Procedure
- Open EV-200-N via ODH HMI page.
- Open EV-100-N via ODH HMI page.
- Monitor TE-104-N and TE-109-N, and ensure they continue to fall to below 95K. This should take 5 - 10 minutes.
- When temperatures reach ~90K, Open VNFA via the purifier overview HMI page, and immediately move to the next step.
- Immediately close EV-200-N.
- Monitor purifier level A and PTA via purifier overview LN2 page on HMI.
- If PTA goes above 8 psig, close EV-100-N.
- When level A reaches 90%, close EV-100-N.
- Open EV-200-N.
- Close VNFA.
- If needing to fill LN2 shield, then transition to that procedure. If LN2 shield does not need to be filled, then leave EV-200-N opened until the transferline warms up (check TE-104,109 after ~4hrs and then close EV-200-N).
- Note down the finish time and the final level for the elog entry.
- Post a Fermilab elog entry regarding this fill (see the past elog entries for the format