Neutron Resonance Transmission Analysis of Reactor Fuel Samples

Behrens, J.W.; Johnson, R.G.; Schrack, R.A.

doi:10.13182/nt84-a33538

Cited by 34 publications

(15 citation statements)

References 2 publications

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“…Behrens et al [3] actually determined the amount of SNMs and some MAs in a cut spent fuel, with an accuracy of 1 -20%. This clearly shows a sufficient potential of NRTA to quantify fissile and fertile materials in nuclear fuels.…”

Section: Introductionmentioning

confidence: 99%

Development of Neutron Resonance Transmission Analysis as a Non-Destructive Assay Technique for Nuclear Nonproliferation<sup> </sup>

Tsuchiya

Kitatani

Maeda

et al. 2018

Plasma and Fusion Research

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Currently, there is much demand for a non-destructive assay technique to quantify special nuclear materials of 235 U and Pu isotopes in a field of nuclear nonproliferation. For this purpose, a compact NRTA system is under development. The performance of a proposed compact NRTA system was investigated by calculating a neutron transmission spectrum for a spent nuclear fuel. In this paper, we mainly evaluated how a transmission spectrum was affected by neutron pulse width and flight path length of the system and discuss the appropriate values from a viewpoint of measurement of special nuclear materials.

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Section: Introductionmentioning

confidence: 99%

Development of Neutron Resonance Transmission Analysis as a Non-Destructive Assay Technique for Nuclear Nonproliferation<sup> </sup>

Tsuchiya

Kitatani

Maeda

et al. 2018

Plasma and Fusion Research

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“…Neutron resonance transmission analysis (NRTA) and neutron resonance capture analysis (NRCA) are useful NRD methods to identify and quantify the target nuclide [2]. They have already been applied to quantify nuclear materials [3][4][5]. Densitometry with a resonance analysis code such as REFIT [6] is used in general and can determine the areal density with high accuracy.…”

Section: Introductionmentioning

confidence: 99%

Non-destructive assay of nuclear materials using a self-indication method

et al. 2017

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Abstract. The integrity test applicable to TRU fuel containing MA with high radioactivity and high decay heat is important for safety. Neutron resonance transmission analysis is adapted for identification and quantification of nuclides in fuels by neutron time-of-flight measurement. In this work, a self-indication method was applied to the measurement of the transmitted neutron. The validation of the self-indication method was performed by using a pulsed neutron source and natural uranium samples at the KURRI-LINAC. The results show that the target areal density can be easily determined from the reduction of the counting rate around the resonances with and without sample. It was confirmed that the reduction ratio due to the neutron resonance absorption can be estimated to within 10%. The numerical estimation showed that the areal density of fuel material can be determined in the range from 10 −6 to 10 −2 (b −1 ) using multiple resonances and suitable thickness self-indicator.

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“…Neutron resonance densitometry (NRD) [1] with the time-of-flight (TOF) technique based on neutron resonance transmission analysis (NRTA) [2] and neutron resonance capture analysis (NRCA) [3,4] is a promising way to characterize the debris. However, there are two difficulties in applying those methods to fuel debris.…”

Section: Introductionmentioning

confidence: 99%

Development of Nondestructive Assay to Fuel Debris of Fukushima Daiichi NPP (1): Experimental Validation for the Application of a Self-Indication Method

Hori

Sano

Takahashi

et al. 2014

Nuclear Back-End and Transmutation Technology for Waste Disposal

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We have proposed a new concept of the "self-indication method" combined with neutron resonance densitometry (NRD) for nondestructive assaying of the distribution of nuclear materials in the fuel debris of Fukushima Daiichi NPP. To verify the method, we performed experiments using a 46 MeV electron linear accelerator at the Kyoto University Research Reactor Institute. First, we measured the area densities of gold foil 10, 20, 30, 40, and 50 μm thick by area analysis at the 4.9 eV resonance region. It was confirmed that the area densities of the target nuclide can be determined by conventional NRD and the self-indication method within 3 % accuracy, respectively. As the next step, we added a silver foil of 50 μm thickness to a gold foil of 10 μm thickness and measured the area density of the gold foil. It was shown that the contribution from the other nuclide (silver foil) can be remarkably suppressed by applying the self-indication method. Finally, we have demonstrated a nondestructive assay of nuclear material using a mixture composed of a natural uranium foil, sealed minor actinide samples of 237 Np and 243 Am. The results indicated that the self-indication method is useful for assaying a mixture of materials with high activity such as fuel debris.

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Neutron Resonance Transmission Analysis of Reactor Fuel Samples

Cited by 34 publications

References 2 publications

Development of Neutron Resonance Transmission Analysis as a Non-Destructive Assay Technique for Nuclear Nonproliferation<sup> </sup>

Development of Neutron Resonance Transmission Analysis as a Non-Destructive Assay Technique for Nuclear Nonproliferation<sup> </sup>

Non-destructive assay of nuclear materials using a self-indication method

Development of Nondestructive Assay to Fuel Debris of Fukushima Daiichi NPP (1): Experimental Validation for the Application of a Self-Indication Method

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