DNV DNV-OS-C105 PDF

A TLP is usually applied for drilling, production and export of hydrocarbons. Storage may also be a TLP function.

A TLP may be designed to function in different modes, typically operation and survival. Also horizontal movement (e.g. by use of catenary or taut mooring) of TLP above wells may be relevant. Limiting design criteria when going from one mode of operation to another shall be established.

The TLP unit should also be designed for transit relocation, if relevant.

For novel designs, or unproved applications of designs where limited, or no direct experience exists, relevant analyses and model testing shall be performed which clearly demonstrate that an acceptable level of safety can be obtained, i.e. safety level is not inferior to that obtained when applying this standard to traditional designs.

Requirements concerning riser systems are given in DNV-OS-F201.

In case of application of a catenary or taut mooring system in combination with tendons, reference is made to DNVOS- E301.

Requirements related to stability (intact and damaged) are given in Sec.6 for ULS condition and Sec.8 for ALS condition.