Climate change has led to a significant increase in jellyfish populations globally, causing various problems. For power plants that use nearby seawater for cooling, the intrusion of jellyfish into intake systems can block the flow, leading to reduced output or even shutdowns. This issue is compounded by other small marine organisms like shrimp and salps, making it urgent to develop solutions to prevent their intrusion. This study addressed the problem using the BioSonics DT-X 120 kHz scientific fish finder to conduct preliminary tank experiments. We also deployed underwater acoustic and camera buoys around the intake of nuclear power plant, utilizing a bidirectional communication system between sea and land to collect data. Data collection took place from July 31, 2023 to August 1, 2023. While harmful organisms such as jellyfish and salps were not detected, we successfully gathered acoustic data on small fish measuring backscattering strength (SV). Analysis showed that fish schools were more prominent in the evening than during the day. The highest fish distribution was observed at 3:30 AM on July 31 with an SV of -44.8 dB while the lowest was at 12:30 PM on the same day with an SV of –63.4 dB. Additionally, a solar-powered system was used to enable real-time data acquisition from sea buoys with smooth communication between the land server and the offshore buoy located 1.8 km away. This research developed an acoustic-based monitoring system for detecting harmful organisms around the intake and provided foundational data for preventing marine organism intrusion and planning effective measures.

최근 사람이나 동물에서 세계적으로 문제가 되고 있는 주요 질병발생은 특정지역이나 국가에 국한되지 않고 국경 없이 전 세계적으로 전파되고 있다. 현재 국내에서 발생하고 있고 FMD, AI라고 하는 구제역, 고병원성 조류인플루엔자와 같은 질병이 그 예로써, 농림축산검역본부는 이러한 질병들의 국내 유입으로 인한 발생이나 확산을 막기 위해 국경과 방역현장의 최전방에서 업무를 수행하고 있는 기관이다. FMD, AI, BSE 등 동물과 인간의 건강을 위협하는 악성가축전염병의 국내 유입 및 확산방지를 위한 농림축산검역본부의 조직과 인력, 그리고 역할 소개와 더불어 국내 축산업과 국민의 건강을 보호하고 지키는 일은 정부기관의 노력만으로는 불가능하며 일반국민, 축산농가, 관련 협회 및 단체 등의 협조가 반드시 필요함을 강조하고자 한다.