To pursue global excellence, JANSI considers that it is critical important for JANSI to collect and analyze new information in Japan and overseas to evaluate and support operators’ voluntary preventive measures to Design Basis Event and External Event in addition to Severe Accident measures.

JANSI developed evaluation method to evaluate and support operators’ safety improvement base on IAEA Safety Report Series No. 46 “Assessment of Defense in Depth for Nuclear Power Plants”. Domestic plants targeted to safety requirement developed from light of defense in depth of SRS 46 are evaluated on whether their safety measures are satisfactory to requirements or not and if it is unsatisfactory, mechanism is analyzed on whether other measures are possible as complement. In parallel with this, further good practices and new knowledge can be found by surveying and studying Japan’s and overseas safety improvement measures various range of issues can be detected to consider. With both evaluations, JANSI identifies issues and considers effectiveness and feasibility of safety improvement measure, providing suggestions to plants as necessary .

JANSI collects, surveys and up-dates new knowledge related to safety improvement (such as measures on safety improvement in Japan and overseas) in order to understand the excellence on international safety improvement and develop it to operators.