It depends on your perspective. Some parts might be based on real events or inspired by them, but it's likely a fictionalized account with creative elements added.
The Pokhran - II tests, also known as Operation Shakti, were a series of nuclear tests conducted by India in May 1998 at the Pokhran test range. These tests demonstrated India's nuclear capabilities. It was a significant event in India's history as it established India as a nuclear - weapon state. It also had various geopolitical implications both within the region and on the international stage.
I'm not sure specifically which 'parmanu real story' you are referring to. It could be about a movie, a scientific discovery related to the atom (since 'parmanu' means atom in some languages), or a personal account. More context would be helpful.
One key aspect is secrecy. The operation was carried out in a highly secretive manner. Another is the scientific achievement. It showed India's scientific community could develop nuclear technology. Also, it had political implications as it changed India's standing in international politics.
There are several factors. Firstly, the way it shows the setting up of the nuclear test site and the precautions taken. Secondly, the characters' reactions and the decision - making processes seem to be based on real - life scenarios. Also, the inclusion of historical events and how they are interwoven with the fictional elements in the movie makes it seem like a real story.
The secrecy involved was crucial. Scientists and military personnel had to keep the entire operation under wraps to avoid interference from other countries. This secrecy was maintained through careful planning and execution. Another aspect was the political will. The Indian government supported the idea of conducting these tests, which was a bold move considering the international situation at that time.