As said, the only physical quantity relevant for evaluating an explosion/implosion is the energy released, which I estimated at the best of my (limited) knowledge.Again, a collection of numbers conveying little information able to allow a subjective understanding of the forces involved. C'mon Angelo, you can be more helpful than that.
If you can provide a better estimate of this quantity, please post your data.
Computing the total force on the vessel is meaningless, as the force is distributed on a convex shape, hence its resultant is null.