engleski

RELAP5/mod2 Code for Win95/NT Environment with F90 Capabilities

Some aspects of modifications necessary to convert RELAP5/mod2 to fortran 90 and to initiate its usage as Windows 95/NT application are discussed. Main characteristics requested from new version are shown. The change in original memory allocation scheme (FTB package) and introduction of dynamic memory allocation are described. The consequences of removal of variables with bit patterns are displayed and changes in INP package are commented. As a result of implemented changes the code is better documented and its maintenance and changes can be easier realized. The new version passed the first phase of the testing. The numerical consistency of the code for different levels of optimization is improved. The calculational speed is increased for up to 50%, for most cases, in Win95 environment. Some useful experience in using fortran 90, directly applicable to RELAP5/mod3.2 is acquired.

code conversion; FTB package; dynamic memory allocation; optimization

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