During the annual inspection of the LN2 tanks, we found that the LN2 tank for CP3 had a high vacuum jacket pressure (110 mtorr), see alog 90283.

We placed an ISP500 on the pump out port to get the jacket pressure back below 10 mtorr, this took ~30 hours of pumping to go from 110 mtorr to 9 mtorr.

No other LN2 tank needed pumpdown.

Closing WP 13448