I think by "division" you must mean nuclear fission
Nuclear fission
The process by which a nucleus divides, resulting in the segregation of the genome to opposite poles of a dividing cell.
Sub Critical
A nuclear meltdown will be in process releasing radioactive material
Most commonly used material to produce nuclear energy in Uranium.
To make a nuclear bomb, you need the fissionable material such as a Plutonium239 isotope, an explosive to start the nuclear chain reaction, a detonator, and a pusher.
Duplicated nuclear material is called chromatin.
mitosis
mitosis, during anaphase; Duplication of the Cells nuclear material is called replication, and the utilization of this condition is called Cellular division, also known as Growth.
Duplicated nuclear material is called chromatin.
meiosis
The process of nuclear division which creates two new identical nuclei is called mitosis.
A material in Class 4 Division 3, more properly called Division 4.3, is a Dangerous When Wet material.
Nuclear division in eukaryotic cells is called mitosis.
During nuclear division and the process of metabolic activities ,some waste materials are formed in the nucleus. it is called nuclear waste.
An un-dividing chromosome remain in the form of loose chromatin material as seen in the inter-phase nucleus. At the tome of nuclear division this chromatin material is organized in the form of thread like structures called chromosomes.
It's called a Chromosome
The process or nuclear division is known as mitosis.