If something is survivable, it means it is possible to live through it or to not be hurt too badly by it.
The word survivable makes people think about danger and being okay after something bad happens.
Examples:
The doctor said the accident was survivable.
Is a tornado survivable?
The storm was survivable because we were safe inside.
I don't think a volcano eruption is survivable!
A zombie apocalypse might not be survivable.
Falling off a bike is survivable, but falling off a cliff is not.