That will depend on many variables (e.g. type of computer, detail of simulation, period of simulated, complexity of weapon being tested).
A few years ago I wrote a very simplified program to simulate a basic spherical implosion atomic bomb weapon design using one of my small Linux based desktop computers running an ARM processor. A typical simulation of roughly the first 20 microsecond of the explosion (beginning from the last few microseconds of the implosion compression of the core) took 2 to 3 minutes of realtime. I made no attempt to develop code for the complex multistage hydrogen bomb designs or even boosted fission designs due to the difficulty of writing the equations for ignition of thermonuclear fusion.
Using the supercomputers that the weapons labs have available they can simulate the full process from the firing of the detonators on the outside of the explosive lenses for several minutes after the complete vaporization of the outer casing. While I have no access to these Top Secret Restricted Data classified programs and thus cannot give a reasonable estimate of how much realtime it takes for one weapons simulation, even if it takes hours (or days) it is much less expensive to run these simulations than to take the weapon, all the instrumentation, the test crew, etc. to a test site and perform the test for real.
The important issue is not the time to simulate but the cost ratio between simulation and testing.
Nuclear weapons take their energy from the Strong Nuclear force that holds the atomic nucleus together.Conventional weapons take their energy from the Electromagnetic force that holds electrons in orbitals around the atomic nucleus.The Strong force is a couple thousand times stronger than the Electromagnetic force.
Yes, you first must have a security clearance then you have to take classes on the weapons you might be using.
They are good because different places won't take the risk of losing more people.
We still not a nuclear country
It took thousands of dollars, and so much time. He claimed to have nuclear weapons, but he was joking.
it takes about millions and millions of years to develope a nuclear power.
nuclear fusion reaction
Earthquakes, tidal waves & North Korean nuclear weapons.
with a nuclear weapon they vary from short and long distances it depends what they equip the missile with like external boosters if everything is added which could make it fly further it would reach almost 7 000 miles ish give or take a few hundred
The Personnel Reliabililty Program (PRP) is indeed a long running program that nuclear weapons handling personnel must qualify for and maintain qualification status in order to deal with any nuclear weapons handling. Generally only personnel in a unit's Weapons Division are certified for handling. For example, on my boat, our Weapons Department comprised Torpedo, Fire Control, and Sonar Divisions, so all of us were PRP certified, as well as Nuclear EOD trained. Civilians must also be certified (e.g., truck transport drivers, crane operators).Having been a PRP member myself for 5 years (I was the capstan operator for my particular boat), I can tell you it doesn't take much to be decertified from the program. Being prescribed certain medications can get you temporarily removed, and even a minor mistake during handling will get you permanently removed. There is no tolerance for screwups when it comes to nuclear power or nuclear weapons in the military.
I think they are still testing
well many people say that war is good for or country because we can win and take over our nation.