甲板下積載禁止危険物の閉囲された車両甲板への積載に関する調査研究

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In accordance with the International Maritime Dangerous Goods Code (IMDG Code), "underdeck stowage" is prohibited for particular dangerous substances, materials or articles. In other words, "on-deck only" is assigned, as stowage category, to particular dangerous goods depending on properties of dangerous goods and on number of passengers on a ship on which the dangerous goods is to be stowed. The IMDG Code was fully implemented in the Japanese national regulation, i.e., "Regulations for the Carriage and Storage of Dangerous Goods in Ships", and entered into force on first of January 2004. By such amendment to the national regulation, stowage of dangerous goods of "on-deck only" on closed vehicle spaces were automatically prohibited, while such dangerous goods can be stowed open vehicle spaces. On the other hand, many ro-ro ferries, in particular those for long voyage, have no open vehicle space and the above mentioned prohibition of stowage of particular dangerous goods on closed vehicle spaces resulted in difficulties of transportation of such dangerous goods, which were commonly used in chemical industry. Because the big effect of the prohibition of stowage was recognized, special stowage of some of dangerous goods of "on-deck only" on close vehicle spaces were tentatively permitted until the end of year 2004. The purpose of this study is to provide guidance for judgment on the special stowage of dangerous goods of "on-deck only" on closed vehicle spaces. In this study, we investigated the properties of dangerous goods petitioned for special stowage in 2004 and further investigated the current practice for carrying dangerous goods on closed vehicle spaces onboard ro-ro ferries. After that, taking into account the hazards and risks involved in such special stowage, we categorized dangerous goods for the judgment on special stowage. As the results of study, briefly speaking, we propose not to permit special stowage of explosives, toxic gases, liquefied flammable or oxidizing gases, organic peroxides, radioactive materials and dangerous goods of other classes for which "packing group I" are assigned. Furthermore, we specified the necessary safety measures for the special stowage, as well as the application of safety measures in relation to properties of dangerous goods. The safety measures include installation of various equipment, e.g., a fixed fire-extinguishing system, a hydrant with a fire pump, a fixed fire-detection system, fire-extinguishers, fire-fighter's outfit and other protective clothing. The safety measures further include limitation of number of vehicles for passenger ships and various operational safety measures, e.g., inspection of cargoes prior to shipment, securing of cargoes during loading, continuous mechanical ventilation, instruction for emergency procedures and booklets.
独立行政法人海上技術安全研究所の論文
2005-11-22

甲板下積載禁止危険物の閉囲された車両甲板への積載に関する調査研究

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