This [Washington Post][1] news article states that with the advent of computer simulation of nuclear tests, live tests are no longer needed.

Generally speaking there are 3 aspects of an Explosion resulting from a nuclear weapon test that are tested:

(a) effectiveness, (b) yield, and (c) explosive capability.

Russia carried out its last nuclear test in 1990, UK in 1991,the US in 1992, France and China in 1996, India & Pakistan in 1998.

[List Of Nuclear Weapon Tests][2]

Therefore, does this mean that all aspects of a Nuclear Explosion can be simulated using Super computers or is there any aspect of a Nuclear Explosion that cannot be simulated by Super Computers? [1]: https://www.washingtonpost.com/national/national-security/supercomputers-offer-tools-for-nuclear-testing--and-solving-nuclear-mysteries/2011/10/03/gIQAjnngdM_story.html [2]: https://en.wikipedia.org/wiki/List_of_nuclear_weapons_tests#Soviet_Union