If you're after a save after Rannoch because you keep getting killed, the trainer doesn't work on that section. It's a scripted event, so you're killed as soon as the beam touches you.
--------------------------------------------------------------------------- "Remember the good old days when you could just slap Omni-Gel on everything?" - Shepard, ME2
"Not right now. Trying to determine how Scale Itch got aboard. Sexually transmitted disease carried only by Varren..... Implications unpleasant." - Mordin, ME2