Characterization of radiation hardened fibers in a research grade nuclear reactor

Zirconium alloys are used for many applications in nuclear components, such as the pressure tube material in a pressurized heavy water reactor, nuclear fuel cladding, etc. One of the problems during the operation of a nuclear reactor is the degradation of the zirconium alloys, which is due to an increase of the hydrogen content in the zirconium alloy. Therefore a non-destructive determination of the hydrogen concentration in zirconium alloy is one of the important issues that need to be addressed. The resonant ultrasound spectroscopy (RUS) technique is evaluated for a characterization of the hydrogen concentration in Zr-2.5Nb alloy. Referring to the terminal solid solubility for dissolution (TSSD) of Zr-2.5Nb alloy, the plot of the mechanical damping coefficient (Q-1) versus the temperature or the deviation of the resonant frequency for the temperature (df/dT) versus the temperature was correlated for the hydrogen concentration in Zr-2.5Nb alloy. It was found that the temperature at an abrupt change of the slope can be correlated with the hydrogen concentration of the Zr-2.5Nb alloy.

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Physico-Chemical Characterization of Particle Fallout from a Damaged Nuclear Reactor — Consequences for Remediation Procedures

Biotechnology for Waste Management and Site Restoration ◽

10.1007/978-94-009-1467-4_7 ◽

1997 ◽

pp. 51-54

Author(s):

C. Ronneau ◽

J. Cara ◽

J. Vanbegin ◽

P. Froment

Keyword(s):

Nuclear Reactor ◽

Chemical Characterization ◽

Physico Chemical

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Expedited Testing Program for Performance Characterization of Asphalt Mixtures

Transportation Research Record Journal of the Transportation Research Board ◽

10.1177/0361198119857033 ◽

2019 ◽

Vol 2673 (12) ◽

pp. 225-233

Author(s):

Intikhab Haidar ◽

Charles W. Schwartz ◽

Sadaf Khosravifar

Keyword(s):

Permanent Deformation ◽

Performance Testing ◽

Testing Procedure ◽

Test Methods ◽

Asphalt Mixtures ◽

Test Specifications ◽

Research Grade ◽

Repeated Load ◽

Lengthy Process

The past two decades have seen significant efforts to standardize a series of simplified test methods to characterize the dynamic modulus (DM) and repeated load permanent deformation (RLPD) performance characteristics of asphalt mixtures using the asphalt mixtures performance tester (AMPT). While the current AASHTO T 79 test specifications for the AMPT are faster and easier to perform than their preceding research grade test protocols, there is still reluctance among highway agencies and industry to conduct performance testing using the AMPT. One significant reason is the lengthy process of sample preparation and testing for the DM and RLPD tests. Two studies to expedite this process are reported here. First, the potential for abbreviating the DM testing procedure was examined. It provides the option to fully exclude testing at 40°C by adding an additional frequency of 0.01 Hz at 20°C. This approach reduces time for testing as well as for sample conditioning at high temperature. Second, the possibility of reducing the total number of required specimens was evaluated. The variation of the DM under repetitive testing and the appropriateness of performing the RLPD test on samples already tested for DM were evaluated. The results showed that specimen damage or densification because of DM testing is insignificant. As a consequence, DM test specimens can be re-used for RLPD testing, reducing the required number of samples from 12 to 9.

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Characterization of new radiation hardened bipolar operational amplifiers

2009 European Conference on Radiation and Its Effects on Components and Systems ◽

10.1109/radecs.2009.5994727 ◽

2009 ◽

Author(s):

Geraldine Chaumont ◽

Benoit Cornanguer ◽

Patrick Briand ◽

Christophe Prugne ◽

Florence Malou

Keyword(s):

Operational Amplifiers ◽

Radiation Hardened

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Prototyping and characterization of radiation hardened SiC MOS structures

2019 European Space Power Conference (ESPC) ◽

10.1109/espc.2019.8931985 ◽

2019 ◽

Author(s):

Francesco Pintacuda ◽

Vincenzo Cantarella ◽

Michele Muschitiello ◽

Silvia Massetti

Keyword(s):

Radiation Hardened ◽

Mos Structures

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Characterization of Changes in Properties and Microstructure of Glassy Polymeric Carbon Following Au Ion Irradiation

MRS Proceedings ◽

10.1557/proc-1215-v16-26 ◽

2009 ◽

Vol 1215 ◽

Cited By ~ 1

Author(s):

Malek Amir Abunaemeh ◽

Mohamed Seif ◽

Young Yang ◽

Lumin Wang ◽

Yanbin Chen ◽

...

Keyword(s):

Photoelectron Spectroscopy ◽

Nuclear Reactor ◽

Ion Irradiation ◽

Pyrolytic Carbon ◽

X Ray ◽

Triso Fuel ◽

Transmission Electron ◽

Displacement Per Atom ◽

Polymeric Carbon

AbstractThe TRISO fuel has been used in some of the Generation IV nuclear reactor designs [1,2]. It consists of a fuel kernel of UOx coated with several layers of materials with different functions. Pyrolytic carbon (PyC) is one of the materials in the layers. In this study we investigate the possibility of using Glassy Polymeric Carbon (GPC) as an alternative to PyC. In this work, we are comparing the changes in physical and microstructure properties of GPC after exposure to irradiation fluence of 5 MeV Au equivalent to a 1 displacement per atom (dpa) at samples prepared at 1000, 1500 and 2000°C. The GPC material is manufactured and tested at the Center for Irradiation Materials (CIM) at Alabama A&M University. Transmission electron microscopy (TEM), Rutherford backscattering spectroscopy (RBS), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy were used for the analysis.

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