World's First Ever LNG FSU Tank Visit Extension with Sloshing Virtual Sensor

Abstract In order to ensure the proper efficiency of an offshore LNG project, it is essential to maintain the safe and continuous operations and to reduce the downtime due to the maintenance activities. In this purpose, GTT has developed an innovative digital solution, the SVS, to monitor the sloshing activity inside the LNG tanks in operation and allowing to extend the cargo tank entry period while complying with the requirements of the regulatory authorities. The purpose of the paper is to share the background and the learnings of this world's first ever preparation and implementation of Alternative Survey Plan supported by Sloshing Virtual Sensor solution as well as the other engineering work related to the cargo tanks for this FSU conversion project. It will include the different steps, from the HAZID workshop with all stakeholders following a RBI approach to the performance of the engineering justification dossier and deployment of the digital solution onboard the FSU.