3. AS IT 15 CONCEIVABLE THAT EXTERNAL EVENTS SUCH AS NATURAL HAZARDS, E.C. EARTHQUAKES, TORNADOES, TROPICAL CYCLONES MIGHT INCREASE SIGNIFICANTLY THE PROBABLITY OF SEVERE ACCIDENTS, IT IS ESSENTIAL TO INCLUDE THESE EVENTS IN THE STUDY. HOWEVER, IT IS APPRECIATED THAT A VIGOUROUS QUANTITATIVE ANALYSIS OF THESE EVENTS WOULD NEED SIGNIFICANT EFFORT AND THE ESSENTIAL INPUT DATA MIGHT NOT BE READILY AVAILABLE. IT WOULD THEREFORE SUFFICE IF THE CONSEQUENCES OF SUCH EXTERNAL EVENTS BE CONSIDERED ## A QUALITATIVE MANNER USING THE SAME GENERAL APPROACH THAT WAS
USED IN THE RSS.