[en] The role of normative standards is to enhance the economic competitiveness of a nation by facilitating the free exchange of goods and services. Approximately 80 percent of all globally traded products are affected by standards and regulations that embody standards. In the present paper we provide a general discussion about the role of normative standards both in the United States and globally, and conclude with a specific discussion of international standards in the area of reactor technology. (authors)

[en] Current hole plasmas in JET are those in which the current density within r/a < 0.3 is close to zero. Tritium ions injected quasi-tangentially into such plasmas can fulfil a stagnation condition whereby their vertical drift is cancelled by the poloidal component of their parallel velocity. These ions remain trapped at approximately 0.2 m from the plasma axis and can be detected by a distortion in the neutron emission profile. Numerical modelling of the steady-state distribution reproduces the experimental results while the decay of neutron emission after the cessation of injection is found to be sensitive to small changes in the q-profile

[en] This paper discusses the Monte Carlo modeling of a time-of-flight (TOF) experiment used to investigate the Fe-56 neutron scattering cross section. This involves utilizing experimental data to provide a Monte Carlo neutron source distribution for which experiments can be compared with simulation. Results indicate this can be an effective methodology for the generation of a source of this kind. Comparisons of calculation and experiment of the time of flight experiment have shown possible deficiencies in the Fe-56 scattering cross section. (authors)

[en] Monte Carlo analysis of a Time-of-Flight (TOF) experiment can be utilized to examine the accuracy of nuclear cross section data. Accurate determination of this data is paramount in characterization of reactor lifetime. We have developed a methodology to examine the impact of modifying the current cross section libraries available in ENDF-6 format (1) where deficiencies may exist, and have shown that this methodology may be an effective methodology for examining the accuracy of nuclear cross section data. The new methodology has been applied to the iron scattering cross sections, and the use of the revised cross sections suggests that reactor pressure vessel fluence may be underestimated. (authors)

[en] Time reversal invariance violation is tightly constrained in the Standard Model, and the existence of a T-violating effect above the predicted level would be an indication of new physics. A sensitive probe of this symmetry in the weak interaction is the measurement of the D-coefficient in neutron decay. This parameter characterizes the triple-correlation of neutron spin, electron momentum, and neutrino (or proton) momentum, which changes sign under time reversal. The emiT experiment, now on line, attempts to improve the measurement of D, whose current average is 0.3±1.5x10^-3

[en] A partial-wave analysis of the reaction pi^-p-->pi⁺pi^-pi^-p at 18 GeV/c has been performed on a data sample of 250 000 events obtained in the Brookhaven experiment E852. The well-known a₁(1260), a₂(1320) and pi₂(1670) resonant states are observed. The existence of the pi(1800), a₁(1700) and a₄(2040) states is confirmed. The a₃(1874) state is also observed. The exotic 1^-+ pi₁(1600) state produced in the natural parity exchange process is found to decay in the rho(770)pi^- channel. A mass-dependent fit results in a resonance mass of 1593±8_-47⁺²⁹ MeV/c² and a width of 168±20_-12⁺¹⁵⁰ MeV/c²

[en] An overview is given of the experimental method, the analysis technique and the results for trace tritium experiments conducted on the JET tokamak in 2003. Observations associated with events such as sawtooth collapses, neo-classical tearing modes and edge localized modes are described. Tritium transport is seen to approach neo-classical levels in the plasma core at high density and low q₉₅, and in the transport barrier region of internal transport barrier (ITB) discharges. Tritium transport remains well above neo-classical levels in all other cases. The correlation of the measured tritium diffusion coefficient and convection velocity for normalized minor radii r/a = [0.65, 0.80] with the controllable parameters q₉₅ and plasma density are found to be consistent for all operational regimes (ELMy H-mode discharges with or without ion cyclotron frequency resonance heating, hybrid scenario and ITB discharges). Scaling with local physics parameters is best described by gyro-Bohm scaling with an additional inverse beta dependence