Changyu Ko, Sungjun Shim, Jeehoon Koo, Jooyoung Kim, Manhee Jeong
언어
영어(ENG)
URL
https://www.earticle.net/Article/A469059
원문정보
초록
영어
Background: Nuclear material accountancy is essential for nuclear security and non-proliferation, requiring fast and accurate measurement methods. To overcome the limitations of conventional thermal neutron multiplicity counting, this study developed a fast neutron multiplicity counting (FNMC) system using organic scintillators. Materials and Methods: An FNMC system was constructed using a pixelated trans-stilbene array and a silicon photomultiplier (SiPM) array. Performance was evaluated through Monte Carlo N-Particle Extended (MCNPX)-PoliMi simulations and experiments at 50 keVee and 100 keVee energy thresholds, analyzing detection efficiency, crosstalk, and singles (S), doubles (D), and triples (T) rates. Results and Discussion: The FNMC system showed a linear relationship between S, D, and T values and mass, with mass estimation errors of 0.4% at 50 keVee and 2.2% at 100 keVee threshold. Lower energy thresholds provided higher detection efficiency and accuracy. The system effectively minimized crosstalk and pile-up errors. Conclusion: The FNMC system provides a precise and reliable method for rapid nuclear material verification. It demonstrates strong potential for non-destructive analysis and nuclear safeguards applications, offering improved efficiency and accuracy compared to conventional methods.
목차
ABSTRACT Introduction Materials and Methods 1. Point Model 2. MCNPX-PoliMi Geometric Design for FNMC System 3. Development of a Pentagon-Shaped FNMC System 4. Time-Dependent Multiplicity Calculation of 252Cf 5. Mass Calibration Using Parameter Assay Results and Discussion 1. MCNPX-PoliMi Simulation 2. Pulse Shape Discrimination Assessment 3. Measurement of Neutron Multiplicity for 252Cf 4. Time-Dependent Multiplicity Measurement of 252Cf 5. Mass Estimation of 252Cf Conclusion Article Information References
키워드
Fast Neutron MultiplicityOrganic ScintillatorSpecial Nuclear MaterialEnergy ThresholdCrosstalk
저자
Changyu Ko [ Department of Nuclear Engineering, Jeju National University, Jeju, Republic of Korea ]
Sungjun Shim [ LIG Nex1 Co. Ltd., Seongnam, Republic of Korea ]
Jeehoon Koo [ LIG Nex1 Co. Ltd., Seongnam, Republic of Korea ]
Jooyoung Kim [ LIG Nex1 Co. Ltd., Seongnam, Republic of Korea ]
Manhee Jeong [ Department of Nuclear Engineering, Jeju National University, Jeju, Republic of Korea ]
Corresponding Author
대한방사선방어학회 [Korean Association For Radiation Protection]
설립연도
1975
분야
자연과학>기타자연과학
소개
회원 상호간의 협조와 친목을 도모함으로써 방사선방어에 관한 제반연구 및 발전에 이바지함을 물론 학술의 국제교류 및 국제학술단체와의 상호협력 증진에 기여함을 목적으로 하며, 이 목적을 달성하기 위하여 다음 각 호의 사업을 한다.
1. 방사선방어에 관한 학술연구발표회 및 강연회 등의 개최
2. 학회지 및 방사선방어에 관한 학술간행물의 발행 및 배포
3. 방사선방어에 관한 학술의 국제교류 및 협력
4. 방사선방어에 관한 국제학술자료의 조사, 수집 및 번역
5. 방사선방어에 관한 조사 및 연구용역
6. 회원의 연구활동을 위한 제반협조
7. 기타 본 학회의 목적 달성에 필요한 사항
간행물
간행물명
방사선방어학회지 [Journal of Radiation Protection and Research]