The International Association of Classification Societies (IACS) has published a new recommendation, titled Rec. 182, to provide a “comprehensive framework” to support the adoption of onshore power supply (OPS) systems.
Rec. 182 was drawn up to provide “detailed guidance for ship designers, builders, operators and owners on integrating OPS systems into both newbuilds and retrofits, while addressing the technical and operational challenges associated with its implementation”, IACS states. The recommendation is intended to complement IMO’s MSC.1/Circ.1675 – Interim Guidelines on the Safe Operation of OPS Service in Port for Ships Engaged on International Voyages, IACS adds.
Subsequently, Rec. 182 outlines aspects such as: ship requirements for OPS; ship-to-shore connection protocols, with an emphasis on safe connection and disconnection; and testing procedures, for both the first connection and periodic check-ups. IACS states: “At the first call at a shore supply point, ships should undergo mandatory tests, including visual inspections, insulation resistance measurements, functional tests of protection devices and integration tests, to ensure proper operation between ship and shore installations.
“If the time between repeated port calls does not exceed 12 months and no modifications have been made, only limited verification tests are required. However, if the interval exceeds 12 months, comprehensive testing as outlined in the document should be conducted.”
Rec. 182 also covers operational safety measures, including the use of suitable PPE, plus ensuring “effective communication” between shipboard crew and shoreside personnel during connection/disconnection procedures. Documentation of OPS operation procedures – which would include circuit diagrams, compatibility assessments and emergency shutdown protocols – is also underscored in the recommendation, as is a pre-connection safety checklist.
IACS says: “The shift towards decarbonisation has placed a spotlight on reducing emissions from seagoing vessels while at ports, where vessels often rely on auxiliary engines that contribute to greenhouse gas [GHG] emissions. OPS, commonly referred to as ‘cold ironing’ or shore-to-ship power, has emerged as a promising solution, allowing vessels to connect to a land-based electrical grid while at berth, enabling their onboard generators to be switched off.” Cold ironing has been credited with significantly cuttting NOx and SOx emissions, plus particulate matter (PM) levels, in port areas, enabling the future development of sustainable ports.
Rec. 182 can be accessed at the IACS website.
