Research and application of the neutronics and thermal–hydraulic coupling based on the MORE framework

The MORE framework, developed by the Nuclear Power Institute of China (NPIC), is a new coupling framework that integrates multiple powerful functionalities for handling input and output data from simulation codes. SHARK, also developed by NPIC, is an advanced whole core transport code that incorporates constructive solid geometry (CSG), the subgroup method, and the 2D/1D transport method. TH1D, another code developed by NPIC, is a single-channel thermal–hydraulic code that utilizes the single-channel model and one-dimensional heat conduction equation. Both SHARK and TH1D are encapsulated within the MORE framework. The coupling system generates interfaces for coupling which are controlled by a supervisor. Finally, validation of the coupling system is conducted using the VERA benchmark, with numerical results demonstrating that the MORE framework is suitable for accurate whole core coupling calculations.