That depends largely on how close you are.
There is no sound emitted by the nuclear fissions themselves. Of course if the material is made into a nuclear weapon then there is a loud sound but this is due to the rapid release of energy causing a blast wave in the surrounding air, not the actual fission process itself.
The meaning of the word nuclear weapon, is a weapon that has a nuclear warhead on it.
This nuclear weapon is called an atomic bomb or a nuclear bomb
Nuclear weapon detonations
If by "bomb" you mean a conventional explosive weapon, then the nuclear weapon is more powerful.
nuclear chemicals such as plutonium
No. LLNL even tested several Uranium-Hydride bombs in the 1950s. Even though their computer models said the devices should explode, none gave a nuclear yield. One could use the waste from the reactor as a Radiological Weapon, but the reactor itself is not useful as a weapon.
NO
no
plutonium + weapon
the first nuclear weapon was issued in WW2 created by the americans in a chicargo squash court
A horn or a siren can produce a loud sound.