Yes, CARRELS is a Scrabble word!

Letter values in Scrabble US: C 3, A 1, R 1, R 1, E 1, L 1, S 1.

Is it a valid word?

CARRELS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

French surgeon and biologist who developed a way to suture and graft blood vessels (1873-1944)
small individual study area in a library

Also: alexis carrel.