Yes, SCULLERIES is a Scrabble word!

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

Is it a valid word?

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

a small room (in large old British houses) next to the kitchen; where kitchen utensils are cleaned and kept and other rough household jobs are done