The heat pipe cooled reactor, characterized by compact size, high safety, and transportability, has emerged as a promising solution for nuclear energy miniaturization. Based on this design, the nuclear power system can be integrated into a standard shipping container for vehicle-mounted mobility, allowing for rapid deployment to remote areas with underdeveloped grid infrastructure, thereby ensuring a continuous and stable energy supply.

This study aims to present the previously proposed and designed Mobile Nuclear Power System (MNPS-1000), a megawatt-scale heat pipe cooled reactor system integrating open Brayton and closed Rankine cycles, while updating its conceptual design based on technical requirements.

The system comprised a 3 MWt thermal power heat pipe cooled reactor and a combined energy conversion system with combination of Brayton cycle and closed Rankine cycle. Driven by parameter matching calculations and design requirements, design analyses of the reactor system and the equipments for energy conversion system of MNPS-1000 were performed, and the layout design of the system was carried out.

The system achieves an electrical output of 1 MWe through the combined energy conversion system and can be integrated into a standard container for on-board mobile applications.

The conceptual design of the MNPS-1000 demonstrates the feasibility of mobile nuclear power system for energy supply, offering high energy density and rapid deployment capabilities.