Yes, SURVIVAL is a Scrabble word!

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

Is it a valid word?

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

a state of surviving; remaining alive
a natural process resulting in the evolution of organisms best adapted to the environment
something that survives

Also: survival of the fittest, natural selection.