Revalidation hazards analyses 123 Table 3.7 Transportation Hazards Analysis (THA) Guidewords Traditional Guidewords High Flow Low/No Flow THA High speed of vehicle Vehicle accidentally stops Ship hits dock Train locomotive loses power Truck reverses into a loading dock Inadvertent reversing of train Locomotive fire/Engine room fire Truck fire/Freight car fire Derailment of a tank car Ship runs aground Truck overturns Reverse Flow High Temperature Loss of Containment performed, with the What-If technique probably being the preferred method. In the case of the plant that is being mothballed, the analysis will include items such as the