Coupling the RELAP Code with External Calculation Programs (Shared Memory Version) (NUREG/IA-0405)

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Publication Information

Manuscript Completed: September 2011
Date Published: October 2011

Prepared by:
Felix Maciel

Comisión Nacional de Energía Atómica
Centro Atómico Bariloche
San Carlos de Bariloche
R8402AGP, Argentina

A. Calvo, NRC Project Manager

Prepared for:
Division of Systems Analysis
Office of Nuclear Regulatory Research
U.S. Nuclear Regulatory Commission
Washington, DC 20555-0001

Prepared as part of:
The Agreement on Research Participation and Technical Exchange
Under the Thermal-Hydraulic Code Applications and Maintenance Program (CAMP)

Published by:
U.S. Nuclear Regulatory Commission
Washington, DC 20555-0001

Availability Notice


A communication library has been developed for the connection of external calculation programs to the RELAP code using shared memory techniques. Modifications to the RELAP program have been introduced in order to implement these facilities.

A portable (non multi-platform) version of the communication library has been achieved, producing a reliable, good performance coupling.

This permits exporting variables from RELAP, operating with them in an external program, and transferring them back to RELAP, working in a synchronized way.

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