WRAP: user convenient relap code package

A modular computational system known as the Water Reactor Analysis Package (WRAP) is being developed at the Savannah River Laboratory for analysis of loss of coolant accidents (LOCA's) and other transients in water reactor systems. At this time, WRAP is essentially a reprogrammed version of the RELAP4 computer code with an extensively restructured input format, a dynamic dimensioning capability and additional computational capabilities such as an automatic steady-state option for pressurized water reactors and an automatic restart capability with provision for renodalization. The paper summarizes both the capabilities of WRAP at its current stage of development and planned additions to WRAP