There was a time when ET's were in the top 5% of the Navy, and those chosen for nuke where in the to 5% of the ET's, and those poor souls had to learn about radar or radio to advance. Nuclear instrumentation was a one month course at prototype. To advance, you had to take tests on radars or communications equipment you never saw.
If you are a 2.8 student, you will have to work your butt off to stay in the program. To fail, you will go no where in the Navy. If you fail, you are probably out of the service, because as a nuke ET, out of the engine rooms, you are useless. USELESS, a failure!
In the old days, you either left the nuclear program as head case or were shipped off to Gitmo, or PBR's. But at least you could fix non-nuke equipment. Have no fear, a nuke ET dropout is as I have said, useless to the modern Navy. Drop out and you will soon be back on the streets as a civilian.