1. Research Scholar, Dept. of Mining Engineering, Indian Institute of Technology, Banaras Hindu Univ., Varanasi 221 005, India (corresponding author). ORCID: .
2. Scientific Officer, Health Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
3. Scientific Assistant, Health Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
4. Scientific Officer, Radiation Safety Systems Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.