RELAP5 to TRACE Conversion - Signal Variable Issue #121
Description
Using a simple RELAp5/MOD3 input model (ninevol.i) to convert to TRACE input. The model is a nine-volume vertical pipe with the top three volumes filled with water and the remaining volumes filled with steam. There are nine minor edit requests in the RELAP5 model. The minor edits are for the void fraction in each of the nine hydro volumes. In the conversion process, the nine minor edit requests are converted into nine TRACE signal variables with the signal variable id being 27 which is void fraction. The void fraction for cell 1 in the RELAP5 model is converted to the signal variable for void fraction for cell 1 in the TRACE model. However, the void fraction for cell 2 in the RELAP5 model gets converted the void fraction for cell 1 in the TRACE model. From thereon out, the TRACE converted void fraction signal variables are off be one cell (R5 cell 1 - Tr Cell 1, R5 Cell 2 - Tr Cell 1, R5 Cell 3 - Tr Cell 2, R5 Cell 4 - Tr Cell 3, ...).
The ascii file for the RELAP5 model and the converted TRACE input model are attached. Note that the RELAP5 minor edit requests do not line up with the converted signal variables in the TRACE model.