Nuclear Engineering and Technology

  • 제53권6호
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  • Pages.1955-1963
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  • 2021
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  • 1738-5733(pISSN)
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  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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Investigation of a novel on-site U concentration analysis method for UO2 pellets using gamma spectroscopy

  • Lee, Haneol (Korea Institute of Nuclear Non-proliferation and Control (KINAC)) ;
  • Park, Chan Jong (Korea Institute of Nuclear Non-proliferation and Control (KINAC))
  • 투고 : 2020.07.13
  • 심사 : 2020.11.30
  • 발행 : 2021.06.25
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초록

As the IAEA has applied integrated safeguards and a state level approach to member states, the importance of national inspection has increased. However, the requirements for national inspection for some member states are different from the IAEA safeguards. In particular, the national inspection for the ROK requires on-site U concentration analysis due to a domestic notification. This research proposes an on-site U concentration analysis (OUCA) method for UO2 pellets using gamma spectroscopy to satisfy the domestic notification requirement. The OUCA method calculates the U concentration of UO2 pellets using the measured net X-ray counts and declared 235U enrichment. This research demonstrates the feasibility of the OUCA method using both MCNP simulation and experiment. It simulated and measured the net X-ray counts of different UO2 pellets with different U concentrations and 235U enrichments. The simulated and measured net X-ray counts were fitted to polynomials as a function of U concentration and 235U enrichment. The goodness-of-fit results of both simulation and experiment demonstrated the feasibility of the OUCA method.

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참고문헌

  1. International Atomic Energy Agency (IAEA), in: The Structure and Content of Agreements between the Agency and States Required in Connection with the Treaty on the Non-proliferation of Nuclear Weapons, vol. 9, 1972. INFCIRC/153 (corrected).
  2. Korea Institute of Nuclear Non-proliferation and Control (KINAC), Handbook of Nuclear Safeguards, 2019, pp. 112-116. KINAC/INSA-001/2019.
  3. Ministry of Government Legislation (ROK MOLEG), Notification on special nuclear material (n.d.). Retrieved May 29, 2020, from, http://law.go.kr/admRulSc.do?tabMenuId=tab107.
  4. H. Lee, H.Y. Kim, J.Y. Choi, H. Seo, Investigation of optimized sample size of nuclear fuel pellets for national inspection, Transactions of the KNS autumn meeting, Goyang, ROK (2019). October 23-25.
  5. International Atomic Energy Agency (IAEA), Safeguards Techniques and Equipment 2003 Edition, 2003, pp. 27-30. International Nuclear Verification Series No. 1, IAEA/NVS/1(Rev.).
  6. S.C. Shon, et al., Comparative analysis for the determination of nuclear materials in spent fuels by electrochemical method, Transactions of the KNS Spring meeting, Jeju, ROK (2001). May 24-25,.
  7. K. Zhao, et al., International Target Values 2010 for Measurement Uncertainties in Safeguarding Nuclear Materials, vol. 48, IAEA ESRADA BULLETIN, 2012, pp. 14-20.
  8. S. Ahn, et al., Development of Reliability Improvement Plan for Thermogravimetric Analysis for the Measurement of UO2 Stoichiometry, 2018, pp. 3-4. KINAC/CR-005/2018.
  9. K. Ollila, K. Lindqvist, Air-oxidation Tests with Gd-Doped UO2: Preliminary Dissolution Experiments with Pre-oxidized Gd-Doped UO2+x, 2003, pp. 11-16. Posiva 2003-08.
  10. S. Dhara, S.S. Kumar, N.L. Mirsa, Betterment in EDXRF analytical results for compositional characterization of mixed uranium thorium oxide samples with bead specimens compared with pressed pellet specimens, X Ray Spectrom. 45 (2016) 268-273. https://doi.org/10.1002/xrs.2701
  11. D.B. Pelowitz, MCNPXTM User's Manual Version 2.7.0, 2011, pp. 5-139. LA-CP-11-00430.
  12. S.M. Bowman, I.C. Gauld, OrigenArp Primer, How to Perform Isotopic Depletion and Decay Calculations with SCALE/ORIGEN, 2010, pp. 21-36. ORNL/TM-2010/43.
  13. Korea Atomic Energy Research Institute (KAERI), Table of gamma rays, Retrieved March 10, 2020, from, http://atom.kaeri.re.kr:8080/gamrays.html.
  14. M. Caccia, A. Ebolese, M. Maspero, R. Santoro, Background removal procedure based on SNIP algorithm for gamma ray spectroscopy with the CAEN Educational Kit, Educational Note 2 (2017) ED3163.