DS397 Saf Use Mod RRs with NUSSC comments 18-06-2010

NEW EXPERIMENTSIII-4. A major reason for modifications is the need to cater for new experiments or to extendexisting experiments. Such modifications can entail new hazards.ADDITIONAL REASONS FOR A PROJECTIII-5. The need for modifications may also arise from considerations of reactor economy,fuel availability, human factors, and physical security.III-6. The relevance of these or other considerations to a particular reactor depends stronglyon the reactor type, age and utilization, and on national safety criteria. Therefore, the reasonfor modification for each of the many existing research reactors cannot be identified anddiscussed in this Safety Guide.55