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  1. Neutron data

    The JRC is by far the largest provider of neutron data in the European Union. The data is generated by measurements at its two large-scale particle accelerators, and is used for the safe operation of nuclear reactors, handling of nuclear waste and investi ...

    30 April 2014

  2. Gamma-ray measurements with LaBr3: Ce detectors- thinking outside the box

    JRC contribution to a conference demonstrating how these detectors may be used to obtain information not only about gamma-rays, but also about neutrons, i.e. thinking "inside” and "outside” the box, respectively. Recently developed cerium-doped ...

    30 April 2014

  3. Neutron spectra measurement and comparison of the HFR and THOR BNCT beams

    This paper aims to measure the spectra of HB11 (high flux reactor, HFR) and the Tsing Hua open-pool reactor (THOR) boron neutron capture therapy (BNCT) beams by multiple activation foils. The selfshielding corrections were made with the aid of MCNP calcul ...

    30 April 2014

  4. New work on updating and extending the Nuclear Data Standards

    An IAEA Data Development Project was initiated to provide a mechanism for allowing new experimental data and improvements in evaluation procedure to be incorporated into new evaluations of the standards. The work on this project is ongoing. In the past ve ...

    30 April 2014

  5. New Evaluation of Neutron Resonance Parameters of Tungsten

    The importance of tungsten in criticality safety calculation motivated a new evaluation of neutron resonance parameters for the most abundant isotopes 182, 183, 184, 186W. The new evaluation is mainly based on a combined analysis of experimental data alre ...

    30 April 2014

  6. Thin Tristearin Deposits as Solid Hydrogen-Rich Layers for Neutron Metrology

    Layers of solid material with a relatively high, constant content of hydrogen that is stable over al long period of timer are needed for recoil proton telecscopes and for precise determination of the cross section ratio of 235U(n,f)/H(n,n). Thin layers of ...

    30 April 2014

  7. Self-irradiation Induced Structural Changes in the Transplutonium Pyrochlores An2Zr2O7 (An=Am, Cf)

    We have pursued the fundamental chemistry of actinide pyrochlore oxides, An2Zr2O7 (An-Am, Cm, Bk, and Cf), using X-ray diffraction as well as optical spectroscopy. One recent facet of our studies has been to observe the structural changes of these materia ...

    30 April 2014

  8. Sensitivity Analysis of Neutron Cross-Sections Considered for Design and Safety Studies of LFR and SFR Generation IV Systems

    We evaluated the sensitivity of several design and safety parameters with regard to five different nuclear data libraries, JEF2.2, JEFF3.0, ENDF/B-VI.8, JENDL3.2, and JENDL3.3. More specifically, the effective multiplication factor, bum-up reactivity swin ...

    30 April 2014

  9. Boron Analysis and Boron Imaging in Biological Materials for Boron Neutron Capture Therapy (BNCT)

    Boron Neutron Capture Therapy (BNCT) is based on the ability of the stable isotope 10B to capture neutrons, which leads to a nuclear reaction producing an alpha- and a 7Li-particle, both having a high biological effectiveness and a very short range in tis ...

    30 April 2014

  10. Neutron Flux from a 14-MeV Neutron Generator with Tungsten Filter for Research in NDA Methods for Nuclear Safeguards and Security

    The Joint Research Centre has taken into operation a new experimental device designed for research in the fields of nuclear safeguards and security applications. The research projects currently undertaken include detection of shielded contraband materials ...

    30 April 2014

  11. A Preliminary Evaluation of Irradiation Damage in Model Alloys by Electric Properties Based Techniques

    The most important effect of the degradation by neutron irradiation is a decrease in the ductility of reactor pressure vessel (RPV) ferritic steels. The main way to determine the mechanical behaviour of the RPV steels is tensile and impact tests, from whi ...

    30 April 2014

  12. Preparation and characterisation of thin film nuclear targets for neutron physical measurements

    In the target preparation laboratory of the Insitute for Reference Materials and Measurements, lithium fluoride, 10B, gold and tristearin thin films are produced by physical vapour deposition for neutron spectroscopy experiments and for neutron cross sect ...

    30 April 2014

  13. Neutron detector characterization for SCINTIA array

    SCINTIA is a new detector array of organic scintillators under development at the Institute for Reference Materials and Measurements (IRMM). The present design of SCINTIA includes NE213, p-therphenyl, stilbene and Li glass neutron detectors positioned in ...

    30 April 2014

  14. The Neutrons for Science Facility at SPIRAL-2

    The 'Neutrons For Science' (NFS) facility will be a component of SPIRAL-2, the future accelerator dedicated to the production of very intense radioactive ion beam, under construction at GANIL in Caen (France). NFS will be composed of a pulsed ne ...

    30 April 2014

  15. Evaluation of Neutron Cross Sections for Hafnium in the Resolved Resonance Range

    The international High Priority Request list notes:- "In the nuclear industry hafnium is used as neutron absorbing material to regulate the fission process. Interpretation of critical experiments with UOx fuel conducted by CEA in the AZUR zero-power ...

    30 April 2014

  16. Partition between the fission fragments of the excitation energy and of the neutron multiplicity at scission in low-energy fission

    The partition between the light (L) and the heavy (H) fission fragments of the excitation energy available at scisssion is studied in the frame of the sudden approximation i.e., under the assumption that the neck rupture and the absorption of the neck pie ...

    30 April 2014

  17. Novel 4π Detection System for the Measurement of the 6Li(n,α)3H Reaction Cross-Section

    A dedicated one-dimensional Time Projection Chamber (1D-TPC) was designed and produced at IRMM to determine the 6Li(n,?)3H cross section, in the 0.4-2.8 MeV energy range, aiming at 5% accuracy. The basic TPC components were a twin gridded ionisation chamb ...

    30 April 2014

  18. A Transparent Detector for n_TOF Neutron Beam Monitoring

    In order to obtain high precision cross-section measurements using the time-of-flight technique, it is important to know with good accuracy the neutron fluence at the measuring station. The detector dedicated to these measurements should be placed upstrea ...

    30 April 2014

  19. Fission Cross-Section Measurements of 233U, 245Cm and 241,243Am at CERN n_TOF Facility

    Neutron-induced fission cross-sections of minor actinides have been measured using the n_TOF white neutron source at CERN, Geneva, as part of a large experimental program aiming at collecting new data relevant for nuclear astrophysics and for the design o ...

    30 April 2014

  20. Reactivity impact of 16O thermal elastic-scattering nuclear data for some numerical and critical benchmark systems

    The thermal neutron-elastic-scattering cross-section data for 16O used in various modern evaluated-nuclear-data libraries were reviewed and found to be generally too high compared with the best available experimental measurements. Some of the proposed rev ...

    30 April 2014

  21. A method for the estimation of fissile mass by measuring the number of neutron signals within a specific time interval

    The purpose of this paper is to present a new method for the estimation of fissile mass by a measurement of the number of neutron signals in time intervals. The method uses the stochastic transport equation to express the first three central moments (mean ...

    30 April 2014

  22. Simulation of MG-AR and TE-TE Ionisation Chambers with MCNPX in a Straightforward Gamma and Beta Irradiation Field

    New methods are required for a better interpretation of the response of ionisation chambers in order to improve further the determination of the absorbed doses in a mixed neutron-gamma BNCT field. Simulations might help to understand in particular the beh ...

    30 April 2014

  23. Database for Time-of-Flight Spectra Including Covariances

    A data format for time-of-flight spectra (transmission, reaction and self-indication yields) and their covariance matrices based on the AGS (Analysis of Geel Spectra) format is discussed in collaboration between EC-JRC IRMM and IAEA-NDS for the EXFOR libr ...

    30 April 2014

  24. Coupled Neutronics Thermal-Hydraulics Analysis using Monte Carlo and Sub-channel Codes

    The accuracy and the degree of spatial resolution of safety studies, required for new reactor concepts, imply the use of coupled 3D neutronic and 3D thermal hydraulic codes. Tools to perform the coupling between neutronic codes both deterministic and stoc ...

    30 April 2014

  25. Neutron-induced fission cross section of 245Cm: New results from data taken at the time-of-flight facility n TOF

    The neutron-induced fission cross-section of 245Cm was measured at n_TOF in a wide energy range and with high resolution. The energy dependence, measured for the first time in a single measurement from thermal to 1 MeV neutron energy, has been determined ...

    30 April 2014