Detecting transportation pipeline leakage points within chemical plants is difficult due to complex pathways, multi-dimensional survey points, and highly dynamic scenarios. However, hexapod robots’ maneuverability and adaptability make it an ideal candidate for conducting surveys across different planes. The path-planning problem of hexapod robots in multi-dimensional environments is a significant challenge, especially when identifying suitable transition points and planning shorter paths to reach survey points while traversing multi-level environments. This study proposes a Particle Swarm Optimization (PSO)-guided Double Deep Q-Network (DDQN) approach, namely, the PSO-guided DDQN (PG-DDQN) algorithm, for solving this problem. The proposed algorithm incorporates the PSO algorithm to supplant the traditional random selection strategy, and the data obtained from this guided approach are subsequently employed to train the DDQN neural network. The multi-dimensional random environment is abstracted into localized maps comprising current and next level planes. Comparative experiments were performed with PG-DDQN, standard DQN, and standard DDQN to evaluate the algorithm’s performance by using multiple randomly generated localized maps. After testing each iteration, each algorithm obtained the total reward values and completion times. The results demonstrate that PG-DDQN exhibited faster convergence under an equivalent iteration count. Compared with standard DQN and standard DDQN, reductions in path-planning time of at least 33.94% and 42.60%, respectively, were observed, significantly improving the robot’s mobility. Finally, the PG-DDQN algorithm was integrated with sensors onto a hexapod robot, and validation was performed through Gazebo simulations and Experiment. The results show that controlling hexapod robots by applying PG-DDQN provides valuable insights for path planning to reach transportation pipeline leakage points within chemical plants.

A silicon photomultiplier (SiPM) coupled Cs₂LiYCl₆:Ce³⁺ (CLYC) detector was developed for neutron detection in the narrow, mixed radiation field. Studies show that the SiPM and scintillator will suffer a certain degree of damage in high-intensity irradiation environments. To evaluate the effects of the radiation damage, the detector was exposed to a zero-power research reactor. The thermal neutron exposures ranged from 0 up to 7.60 × 10⁷ n/cm². The performance specifications on the gamma ray and thermal neutron pulses, ⁶Li(n, α)³H thermal neutron peaks, energy resolutions, and pulse shape discrimination were analyzed. The results showed that the standard gamma ray and thermal neutron pulses were slightly altered, the thermal neutron peak centroid reduced by 40%, the energy resolution of the ⁶Li(n, α)³H thermal neutron peak deteriorated from 15% to 21%, and the figure of merit of pulse shape discrimination decreased from 1.41 to 1.16. These variation curves can be applied to evaluate and correct the detector irradiation damage.