There is a growing interest from, newcomer countries to utilise nuclear energy for electricity
generation. The International Atomic. Energy Agency (IAEA) has developed two methodologies,
namely, the IAEA Milestone Approach and the International Project on Innovative Nuclear Reactors
and Fuel Cycles (INPRO) Methodology to help its Member States in assessing the viability of nuclear
power programme (NPP) and nuclear energy system. This paper highlights important features of both
methodologies in supporting deployment of nuclear power programme for a newcomer country. In
summary, the IAEA Milestone Approach focuses for near term while the INPRO Methodology focuses
for long term assessment to support the deployment of first NPP in newcomer countries. Depending
on newcomer country's priority and resources, both methodologies can be performed either separately
or in-parallel.