The Review of Laser Engineering
Online ISSN : 1349-6603
Print ISSN : 0387-0200
ISSN-L : 0387-0200
Volume 40 , Issue 3
Special Issue on Growing Laser Application on Nuclear Engineering
Showing 1-7 articles out of 7 articles from the selected issue
Special Issue on Growing Laser Application on Nuclear Engineering
Special Issue
Laser Review
  • Hiroshi HORIIKE
    2012 Volume 40 Issue 3 Pages 164-
    Published: 2012
    Released: July 16, 2020
    JOURNALS FREE ACCESS
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  • Eisuke MINEHARA
    2012 Volume 40 Issue 3 Pages 165-
    Published: 2012
    Released: July 16, 2020
    JOURNALS FREE ACCESS
    A new laser decontamination device has been developed to evaporate instantly with almost no temperature rise and to clean up the radioisotope (RI) contaminated stainless steel components, devices and major structural objects of nuclear power station, nuclear fuel reprocessing plants, accelerator facilities and the related ones. The laser decontamination device delivers the tightly focused laser light of GW/cm2 just on the surface to clean up RI contained rust mold on and inside the stress corrosion cracks and corrosion pitting in the stainless steel-made components, devices and objects. The decontamination device is newly designed to measure three-dimensional surface map very quickly, and successfully to peel the three-dimensional irregular surface according to the measured map using the three dimensional fast scanner, displacement meter and laser system. In the cold tests, the device performed to peel off the surface of cans and multi-stepped plates very precisely, very uniformly and very quickly.
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  • Akira YOSHIKAWA, Takayuki YANAGIDA, Kentaro FUKUDA, Noriaki KAWAGUCHI, ...
    2012 Volume 40 Issue 3 Pages 171-
    Published: 2012
    Released: July 16, 2020
    JOURNALS FREE ACCESS
    Single crystal scintillator materials are widely used for detection of high-energy photons and particles. There is continuous demand for new scintillator materials with higher performance because of increasing number of medical, industrial, security and other applications. This article presents the recent development of three novel inorganic scintillators; Pr-doped Lu3Al5O12 (Pr:LuAG), Ce doped Gd3 (Al, Ga)5 O12 (Ce:GAGG) and Ce or Eu-doped 6LiCaAlF6 (Ce:LiCAF, Eu:LiCAF). Pr:LuAG shows very interesting scintillation properties including very fast decay time, high light yield and excellent energy resolution. Taking the advantage of these properties, positron emission mammography (PEM) equipped with Pr:LuAG were developed. Ce:GAGG shows very high light yield, which is much higher than that of Ce:LYSO. Survey meter using Ce:GAGG is developed using this scintillator. Ce:LiCAF and Eu:LiCAF were developed for neutron detection. The advantage and disadvantage are discussed comparing with halide scintillators. Eu-doped LiCAF indicated five times higher light yield than that of existing Li-glass. It is expected to be used as the alternative of 3He.
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  • Hideaki NIKI
    2012 Volume 40 Issue 3 Pages 177-
    Published: 2012
    Released: July 16, 2020
    JOURNALS FREE ACCESS
    The interest on isotopes and their applications increased in many fields such as nuclear power generation and medicine. Laser isotope separation is a promising technique for its high selectivity and efficiency. Isotopes of Gd and Zr, which are important materials in nuclear engineering, can be separated by selective stepwise or multiphoton ionization method based on polarization selection rules. Development of isotope separation of 93Zr, 126Sn, and 135Cs is desired for future nuclear transmutation of long-lived fission products. Separation method of 48Ca by radiation pressure is proposed for double-beta- decay experiment.
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  • Akihiko NISHIMURA
    2012 Volume 40 Issue 3 Pages 183-
    Published: 2012
    Released: July 16, 2020
    JOURNALS FREE ACCESS
    The recent improvement of laser technologies will contribute to the maintenance of nuclear power plants. The Japan Atomic Energy Agency developed a specially designed probing system was developed to inspect and repair the cracks of the welded beads of the heat exchanger tubes of nuclear power plants. Eddy current testing detected inner wall cracks in heat exchanger tubes. The tube thickness was 4.5 mm and the inner diameter was 23 mm. The minimum detectable depth of the cracks was 10% of the tube thickness. Endoscope observation confi rmed the cracks along the welded beads. Laser welding by a 300 W compact fi ber laser successfully repaired them. The probing system will operate in new nuclear power plants with various laser monitoring technologies for coolant pipes.
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  • Hideaki OHGAKI, Takehito HAYAKAWA, Izuru DAITO
    2012 Volume 40 Issue 3 Pages 188-
    Published: 2012
    Released: July 16, 2020
    JOURNALS FREE ACCESS
    Progress in laser physics and accelerator physics has enabled us to use a new generation gamma-ray beam, namely laser Compton scattering (LCS) gamma-ray beam. The LCS gamma-ray beam has advantages that are an energy-tunable quasi-monochromatic gamma-ray beam. We have studied a nondestructive assay using nuclear resonance fluorescence with a LCS gamma-ray beam. This assay can be applied to the detection of nuclear materials hidden in cargo or a container. By measuring the amounts of the levels of oxygen, nitrogen, and carbon, the type of explosive can also be identified. We have demonstrated the detection of lead or melamine hidden in iron shields with thicknesses of 10-15 mm. Advanced laser technology is crucial to realize a compact gamma-ray source that can be installed in seaports.
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