Fuel Assembly Failure Detection System
A failure detection system for post-irradiation fuel assemblies, using offline ex-core sipping inspection. The system flushes the fuel assembly surface through a circulating water loop and measures radioactive gamma content in the circulating water to identify assembly failure.
Product Overview
▅ Core Technical Advantages
Fast and accurate fuel assembly failure detection: A high-sensitivity gamma content measurement system captures trace radioactive gamma signals in circulating water. Optimized water flushing helps identify failure signals quickly and supports timely fuel assembly safety assessment.
Safe offline sipping inspection: The ex-core offline inspection mode is isolated from the operating core. A closed sipping loop reduces radioactive leakage risk and direct personnel contact, supporting safe and controlled inspection.
Water-isolated detection design: The fuel assembly remains underwater throughout the process at an equipment working depth of 10-15 m. The flushing and detection loop is arranged onshore and connected through underwater sealed interfaces, using the water layer as radiation shielding.
Modular rapid assembly: Process loop, radiation detection, gamma testing and electrical control modules use standardized interfaces, enabling fast assembly and commissioning for different site layouts and inspection scales.
Full-parameter real-time monitoring: Temperature, pressure and flow sensors monitor loop conditions in real time. Detection data and loop parameters are analyzed together to avoid accuracy loss caused by process fluctuations.
Intelligent data management: The control system automatically collects gamma content data, loop parameters and equipment status, supports data storage, traceability and abnormal-condition alarms, and generates inspection reports aligned with nuclear safety management needs.
▅ Key Technical Parameters
Detection object: post-irradiation fuel assemblies
Detection method: offline sipping
Detection element: gamma
Equipment working water depth: 10-15 m
Circulating medium: deionized water
Loop monitoring parameters: temperature / pressure / flow
Product size for inspection: 300 mm x 300 mm x 3000 mm
Applicable materials: post-irradiation nuclear fuel assemblies
Core functions: fuel assembly failure detection, gamma content measurement and loop-parameter monitoring
Typical applications: nuclear power plant fuel workshops, nuclear fuel handling plants and nuclear power operation inspection centers
▅ Application Value
The system combines offline sipping isolation, high-sensitivity gamma detection and full-parameter monitoring to provide reliable data for nuclear fuel safety assessment. The underwater storage and onshore detection mode reduces direct contact with radioactive materials and improves detection response by more than 60% compared with conventional methods.