Publikationsrepositorium - Helmholtz-Zentrum Dresden-Rossendorf

Monte Carlo Simulations have been carried out to estimate the gamma radiation distributions outside the reactor pressure vessel of a generic pressurized water reactor for a set of simplified accident-like reactor states.
This is done as a first step towards the development of a non-invasive core monitoring system for light water reactors.
The results show a change in the shape of the gamma ray distributions for decreasing coolant levels as well as a vast increase in flux for corium accumulating inside the lower head.