Development of an Electromagnetic Radiation Screening System using Push-Shield Door for Radiation Safety

This study evaluates radiation exposure risks associated with baggage jamming in X-ray security inspection systems and proposes a new push-type shielding door mechanism to mitigate such exposure. Using the Monte Carlo code MCNPX v2.7 and the HDRK-Man computational phantom, simulations were conducted to estimate leakage and operator dose rates under various obstruction scenarios. The results demonstrated that when the lead curtain was fully open due to baggage jam, operator exposure reached up to 22.69 μSv/hr, exceeding public dose limits. Implementation of the newly designed shielding door reduced this dose to 0.06 μSv/hr, achieving a 99.7% reduction in exposure. The proposed system not only ensures compliance with domestic radiation safety regulations but also improves operational efficiency and inspection stability.