ClassNK has issued an approval in principle (AiP) for an ammonia-fuelled 200,000-dwt bulk carrier jointly developed by a Japanese consortium of owners, shipbuilders and marine technology companies
The consortium partners are ITOCHU Corp, Nihon Shipyard, Mitsui E&S Machinery, Kawasaki Kisen Kaisha, (K Line), and NS United Kaiun Kaisha.
Prior to issuing the AiP, ClassNK carried out the design review of the capsize bulk carrier design developed by ITOCHU, Nihon Shipyard, Mitsui E&S, K-Line, and NS United Kaiun in line with Part C of its Guidelines for Ships Using Alternative Fuels. Additionally, the class society carried out a risk assessment through HAZID (Hazard Identification Study).
The consortium plans to deliver the vessel in 2026, with ClassNK continuing in its role as the certification body, providing appropriate standards for ammonia-fuelled ships through a collaborative process.
While ammonia is seen as an emerging alternative fuel for decarbonisation, it still presents some major challenges to its use. Though carbon-free when combusted, ammonia is highly toxic to humans and corrosive to materials. Engine technology, bunkering and safety guidelines and adequate supply are just some of the issues that must be addressed to ensure the fuel’s safe uptake in the industry.
ClassNK has been involved in projects aiming for zero-emission ships using ammonia fuel in terms of safety assessment, and has issued its “Guidelines for Ships Using Alternative Fuels” as a necessary standard to minimise the risks related to ammonia-fuelled ships for the ships, crews, and environment by stipulating requirements for installation, controls, and safety devices.
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