Journal of the Korean Society of Radiology (한국방사선학회논문지)

The Korean Society of Radiology (한국방사선학회)
권호 표지
DOI QR코드

DOI QR Code

Evaluation of the Filling Sodium States Inside the Fuel rod of Sodium-Cooled Fast Reactor by Optimized Spatial Resolution in Medical Digital Radiographic Images

의료용 디지털방사선영상의 공간분해능 최적화에 의한 소듐냉각고속로 연료봉 내부의 소듐 충전상태 평가

  • 성열훈 (청주대학교 방사선학과)
  • Received : 2016.02.11
  • Accepted : 2016.02.29
  • Published : 2016.02.29
Download PDF
⟨ Previous Next ⟩

Abstract

The purpose of this study was tried to evaluate the filling sodium states inside the fuel rod of sodium-cooled fast reactor by digital medical X-ray. We used the diagnostic X-ray generators in digital radiography (DR). This study have found the optimal conditions by changing the effective focal spot size of X-ray tube and post-processing of the DR method with a tungsten edge plate in order to ensure excellent sharpness At this time, the sharpness and resolution were evaluated using the MTF (modulation transfer function). As a result, this study obtained a spatial resolution of 3.871 lp/mm (0.1 MTF), 3.290 lp/mm (0.5 MTF) when implemented the contrast strengthen post-processing in small focal spot. In this research, the result is able to evaluate the level of sodium inside the fuel rod by using the diagnostic X-ray generators in medical digital radiographic images.

본 연구에서는 디지털 의료용 X선을 이용하여 소듐냉각고속로 금속연료봉 내부의 소듐 충전상태를 평가하고자 하였다. 의료용 X선은 디지털방사선(digital radiography, DR)시스템을 사용하였다. 최상의 공간분해능을 도출하기 위해 X선관의 초점크기와 디지털영상후처리 방법을 변화시켰다. 이때 텅스텐을 이용한 에지방법의 변조전달함수(modulation transfer function, MTF)를 사용하여 선예도(0.5 MTF)와 해상도(0.1 MTF) 를 평가하였다. 그 결과 소초점에서 영상후처리의 대조도를 강화시킨 조건에서 3.871 lp/mm (0.1 MTF)와 3.290 lp/mm (0.5 MTF)의 공간분해능을 얻었다. 결론적으로 이러한 결과는 디지털 의료용 X선을 이용하여 소듐냉각고속로 금속연료봉 내부의 소듐 충전상태를 관찰할 수 있었다.

Keywords

References

  1. http://en.wikipedia.org/wiki/Atoms_for_Peace
  2. http://en.wikipedia.org/wiki/Nuclear_power
  3. http://en.wikipedia.org/wiki/Generation_IV_reactor
  4. http://www.iaea.org/INPRO
  5. Report of Phase 1A of the International Project on Innovative Nuclear Reactors and Fuel Cycles (INPRO), "Guidance for the evaluation of innovative nucle ar reactors and fuel cycles", IAEA-TECDOC-1362, International Atomic Energy Agency, 2003.
  6. M. K. Lee, "Study on the progress of international generation IV nuclear energy systems project and for mulation R&D policy", Graduate School of Pusan National University, 2007.
  7. J. Y. Lim, K. Y. Lee, M. H. Kim, "Nuclear core design and performance evaluation of a Pb-Bi Cooled transmutation fast reactor", The journal of industrial liaison research institute, Vol. 13, No. 1, pp. 1-7, 2007.
  8. J. M. Ryskamp, "A Technology roadmap for generation IV nuclear energy systems", Idaho National Engineering and Environmental Laboratory, US-DoE and GIF, 2002.
  9. Y. I. Kim, Y. B. Lee, C. B. Lee, J. W. Chang, C. W. Choi, "Design concept of advanced sodium-cooled fast reactor and related R&D in Korea", Science and Technology of Nuclear Installations, Vol. 2013, p p. 1-8, 2013.
  10. S. J. Oh, S. H. Kim, H. J. Jeon, K. H. Kim, C. B. Lee, "Analysis of neutrons radiography in SFR simulated metal fuel core fault", Korean Radioactive Waste Society, Vol. 10, No. 2, pp. 129-130, 2012. in Korean.
  11. H. Fujita H, D. Y. Tasi, J. Morishita, K. Ueda, A. Ohtsuka, "A simple method for detering the modulation transfer function in digital radiography", Medical Imaging, IEEE Transactions, Vol. 11, No. 1, pp. 34-39, 1992. https://doi.org/10.1109/42.126908
  12. Y. H. Seoung, "Evaluation of the Spatial Resolution for Exposure Class in Computed Radiography by Using the Modulation Transfer Function", Journal of Digital Convergence, Vol. 11, No. 8, pp.273-279, 2013. https://doi.org/10.14400/JDPM.2013.11.8.273
  13. Y. H. Seoung, "Quantitative Analysis of Spatial Resolution for the Influence of the Focus Size and Digital Image Post-Processing on the Computed Radiography", Journal of Digital Convergence, Vol. 12, No. 11, pp.407-414, 2014. https://doi.org/10.14400/JDC.2014.12.11.407
  14. H. W. Cho, K. S. Chon, "Change of MTF for Sampling Interval in Digital Detector", Journal of the Korea Society of Radiology, Vol. 8, No. 5, pp. 224-230, 2014.
  15. B. S. Kang, "Development of Image Quality Evaluation Program for Digital Diagnostic Radiography", Journal of the Korea Society of Radiology, Vol. 2, No. 2, pp. 5-10, 2008.