Effect of Ice on an Explosion

I have asked this question before, I think, but did not get a direct answer. If an explosion is detonated in the core of an iceberg, will the ice absorb most of the energy from the explosion, via the three phases of the ice as it melts and then vaporizes or will the explosion happen too fast for this effect to have an appreciable effect on the explosion?

I recall an aircraft carrier being built with an ice and sawdust (pykrete) hull that was supposedly torpedo proof. It was never put into service because of the expense and difficulty maintaining the ice.

It lies at the bottom of Patricia lake in Canada.