Atomic Energy of Canada Limited

About: Atomic Energy of Canada Limited is a company organization based out in Ottawa, Ontario, Canada. It is known for research contribution in the topics: Neutron & Zirconium alloy. The organization has 4845 authors who have published 4826 publications receiving 102951 citations.

Stopping powers of C, Al, Si, Ni, Ag and Au for 7Li ions

Abstract: Absolute stopping values for 7Li ions in selected target elements were measured over the energy range 0.2–1.8 MeV. Surface barrier particle detectors were used to measure the energy loss of 7Li ions in passing through thin, self-supported films. The results show that in the slowing down process, the effective charge ratio of lithium to hydrogen ions, at constant velocity, is not independent of the stopping medium.

Flow regime boundaries for an interior subchannel of a horizontal 37‐element bundle

Abstract: A needle contact probe system has been constructed and used to determine flow regime transitions for an interior subchannel in the upper half of a 37-element horizontal bundle (to include the effect of gravity separation) for adiabatic air-water flow. For the experimental range considered (up to ˜15.5 K*s−1, 50% quality), five distinct flow regimes were identified. Using the equivalent hydraulic diameter concept and cross-sectional average superficial velocities, air quality and total mass flux, flow regime maps were constructed. These maps are shown to deviate from pipe flow regime maps. The stratified smooth flow regime was never observed at the lowest flow rate considered due to the periodical disturbance of the flow by the bundle end plates and mid-plane spacers. On a construit un systeme de sonde a contact par pointe, et on l'a employe pour determiner les limites de regimes d'ecoulement pour un sous-canal interieur dans la moitie superieure d'un faisceau horizontal de 37 elements (pour tenir compte de l'effet de la separation par gravite); ce systeme a ete utilise dans le cas d'un ecoulement adiabatique d'air et d'eau. On a identifie cinq regimes d'ecoulement distincts sur la plage experimentale etudiee (allant jusqu'a ˜ 15.5 kg*s−1, qualite 50%). On a etabli des cartes de regime d'ecoulement, en employant le concept du diametre hydraulique equivalent, les vitesses superficielles moyennes dans une section droite, la qualite de l'air et le debit total en masse. On voit que ces cartes different de celles des regimes d'ecoulement dans les tubes. On n'a jamais observe le regime d'ecoulement stratifie et non turbulent au plus faible debit etudie, a cause de la perturbation periodique de l'ecoulement par les plaques d'extremite du faisceau et des espaceurs a mi-plan.

Bioconcentration of fallout 137Cs by fungi and red-backed voles (Clethrionomys gapperi).

Abstract: Cesium-137 and 40K concentrations were measured in vegetation and in red-backed voles (Clethrionomys gapperi) in southeastern Manitoba, Canada, following the Chernobyl accident in 1986. Voles from wet coniferous habitats contained concentrations of 137Cs twenty- to fiftyfold higher than vole