Abstract
Differential die-away Analysis (DDAA) technology is a powerful analytical technique to detect fissile materials such as 235U and 239Pu. It can reveal the presence of nuclear materials even when shielded or embedded in non-fissile matrices by inducing fission through externally applied pulsed neutrons. An innovative modular system that is convenient for transportation and suitable for various application scenarios is proposed. The detection sensitivity of the system, with different structures, is studied. The data acquisition hardware, along with real-time online measurement and alerting software, have been developed. The results indicate that a detection system with a bilaterally arranged array of detectors offers enhanced sensitivity, enabling rapid detection of a single nuclear fuel rod (200.4g) under heavy shielding and at standard distances.
Published Version
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