Yes, RETRIEVALS is a Scrabble word!

Letter values in Scrabble US: R 1, E 1, T 1, R 1, I 1, E 1, V 4, A 1, L 1, S 1.

Is it a valid word?

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

(computer science) the operation of accessing information from the computer's memory
the cognitive operation of accessing information in memory
the act of regaining or saving something lost (or in danger of becoming lost)