Given the ambiguity and the lack of specific details, here are some general steps to understand what an "NEA R1 License" might entail:

R1 - Registration as a radiation worker | Licence & Accreditation

Must be a Singapore Citizen, Permanent Resident, or hold a valid work visa. Age: Applicants must be at least 18 years old.

S$25.00 (for changes to personal or employer details). How to Apply