An advanced hybrid simulation is proposed which consists of the integration of serial computation, parallel computation and knowledge information, processing in order to realize flexible simulation by satisfying both fast computation and software productivity improvement. It is realized as an extention of the following two developments: (1) module-based simulation systems (MSS) as a simulation support enviroment, and (2) a shared-memory-type parallel computer CX-1 as a back-end processor to a main frame computer to improve computation speed in numerical solution of partial differential equations.
The MSS system has been constructed based on module library, module database, automatic module integration, knowledge-based input generator and human interface to improve software productivity both in developing and executing large-scale simulation programs of nuclear power system. The software package of the commuication between CX-1 and host computer is extended so that CX-1 programs may be integrated into MSS. A demonstrative practise of a hybrid BWR reactor core simulatior is conducted using CX-1 as hardware module to solve neutron diffusion equations numerically in two-dimensional space.