[en] As was shown in part A and part B of this series of three papers, the current working model used by Radiation Protection (RP) professionals is based on a concept that can be conceptually represented by the expression: RISK = a * DAMAGE, with RISK being the stochastic risk from Ionizing Radiation (IR), DAMAGE being DNA damage and a being a real' positive and constant expression (part A). A list of well documented empirical phenomenology, mainly from the last two decades, was also brought (part B), that show that the natural reality has been, most likely much more complex to be described in a risk model such as the Linear Non Threshold (LNT) one. The discussion in this part will draw on this phenomenology in order to call for new and fresh design efforts of new risk estimation concepts that will describe the natural reality more accurately. It will reflect the notion that acquires more and more supporters as follows: The LNT guideline for risk estimates in RP is based on a too simplified model. It is based on a damage theory that does not take in consideration the biological inter and intra cellular complex damage response network and the complex carcinogenesis