30 Sep 2019
In the coming weeks, IADC will publish fourteen nominations in the running to receive the Safety Award 2019 on its website and social media. The winner will be announced on 17 October 2019.
IADC is proud to announce that the thirteenth nomination is:
Van Oord’s pre-assembled onshore “CPS Storage & Handling system” avoids the risks of crane lifting
When a subsea power cable is laid, there is an area where the cable may be subjected to increased dynamic forces, which the cable is not necessarily designed to survive over the lifetime of the installation. A Cable Protection System (CPS) is used to protect the subsea power cables against these negative impacts over the long term. The installation of this protective CPS is traditionally done using an on board crane. The crane picks up all parts of the CPS independently from an open top container and then places the parts on the cable highway for installation. This is an operation that has many risks including dropping objects and suspended loads falling on workers. To improve safety and eliminate these risks during the lifting operations, including those caused by the assembly of CPS on deck, a special “CPS Storage & Handling system” has been designed and mobilised on Van Oord's cable laying vessel 'Nexus'. This new system eliminates the need for offshore craning to install the CPS protection during cable installation.
With this new CPS Storage & Handling system the CPS are completely assembled onshore and placed as a whole in racks. Then, when the vessel is in port, the complete rack is placed on the vessel. This saves time and handling of different components and mitigates many risk factors. By eliminating offshore lifting there are no more suspended loads, no one walks below the suspended load and there can be no dropped objects. The system also features a vertical sliding ramp. This ramp, placed in front of the CPS rack is movable, and is pulled by a winch, avoiding the need for manual handling, and allowing workers to slide out any CPS at any time. In addition, the system is weatherproof because no lifting by crane is necessary, operations can continue regardless of whether wind speeds exceed the crane limits. All these factors have created a safer work environment during day-to-day operations.
The CPS rack can store up to 48 CPS systems, in different layers. Any CPS size can be installed at any time. This means there is more flexibility during cable installation, which results in higher production.
The system was designed digitally (in 3D) and after completion of the design, and all calculations were done, the system was directly built and installed on the Nexus. The system is operational and works as expected. Although the CPS is more efficient and installation is done more quickly, which leads to higher production rates and a shorter installation cycle, the real plus is the increased safety for crew.