کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8177801 | 1526389 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Statistical uncertainties of nondestructive assay for spent nuclear fuel by using nuclear resonance fluorescence
ترجمه فارسی عنوان
عدم قطعیت آماری آزمون غیر سازنده برای سوخت هسته ای با استفاده از فلورسانس رزونانس هسته ای
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کلمات کلیدی
تست غیردولتی، فلورسانس رزونانس هسته ای، پراکندگی لیزر کمپون، پرتو فوتون مونو پر انرژی،
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
ابزار دقیق
چکیده انگلیسی
We estimated statistical uncertainties of a nondestructive assay system using nuclear resonance fluorescence (NRF) for spent nuclear fuel including low-concentrations of actinide nuclei with an intense, mono-energetic photon beam. Background counts from radioactive materials inside the spent fuel were calculated with the ORIGEN2.2-UPJ burn-up computer code. Coherent scattering contribution associated with Rayleigh, nuclear Thomson, and Delbrück scattering was also considered. The energy of the coherent scattering overlaps with that of NRF transitions to the ground state. Here, we propose to measure NRF transitions to the first excited state to avoid the coherent scattering contribution. Assuming that the total NRF cross-sections are in the range of 3-100Â eVÂ b at excitation energies of 2.25, 3.5, and 5Â MeV, statistical uncertainties of the NRF measurement were estimated. We concluded that it is possible to assay 1% actinide content in the spent fuel with 2.2-3.2% statistical precision during 4000Â s measurement time for the total integrated cross-section of 30Â eVÂ b at excitation energies of 3.5-5Â MeV by using a photon beam with an intensity of 106Â photons/s/eV. We also examined both the experimental and theoretical NRF cross-sections for actinide nuclei. The calculation based on the quasi-particle random phase approximation suggests the existence of strong magnetic dipole resonances at excitation energies ranging from 2 to 6Â MeV with the scattering cross-sections of tens eVÂ b around 5Â MeV in 238U.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 737, 11 February 2014, Pages 170-175
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 737, 11 February 2014, Pages 170-175
نویسندگان
Toshiyuki Shizuma, Takehito Hayakawa, Christopher T. Angell, Ryoichi Hajima, Futoshi Minato, Kenya Suyama, Michio Seya, Micah S. Johnson, Dennis P. McNabb,