AISによるむつ小川原沖の船舶動静と衝突頻度の評価

摘要

青森県むつ小河原港は、六ヶ所村の核燃料再rn処理施設に対し、全国の原子炉施設から海上輸rn送されてくる使用済核燃料あるいは廃棄物の搬rn入港であり、それらの運搬船が頻繁に通航するrn港周辺及びむつ小河原沖の航行安全は放射性物rn質の安全輸送の面から重要な検討課題である。rn海上輸送の安全には国の安全基準を満たす堅牢rnな輸送容器及び運搬船を用いた対策が実施されrnてきたが、近い将来、核燃料サイクルを含む諸rn事情の変化から輸送物の多様化及び輸送量の増rn加が見込まれており、関係各所は状況の変化にrn適切に対処すべく航路計画等の輸送システム全rn体を見わたしたリスク管理について検討を始めrnている。%The marine transport of nuclear fuels in Japan's coastal waters has been safely conducted using an exclusive vessel meeting national safety standards. One of the current issues is to prepare the changes in the situation proactively since it is expected that the progress of the nuclear fuel cycle will bring an increase in volume and diversity of packages to be transported. The organizations concerned have begun to survey recent studies to know the possibility of risk management for the marine transport system. Of accidents related to marine transport, collisions between vessels are regarded as one of the risks that can reasonably manage by the reliable infomation. Here we focus attention to onboard Automatic Identification System (AIS) data to examine traffic characteristics and the applicability to the risk asessment. In this study, area traffic information is arranged according to aspects of interest by analyzing AIS data received several months at the port of Mutsu-Ogawara, place of loading packages, and the collision frequency results thereby estimated are reported. Finally, the uses of the obtained information for our purpose and their effects are considered.