With an aging fleet of nuclear generating facilities, the imperative to limit the use of non-renewal fossil fuels and the inevitable need for additional electricity to power Canada's economy, a renaissance in the use of nuclear technology in Canada is at hand. The experience and knowledge of over 40 years of CANDU research, development and operation in Ontario and elsewhere has been applied to a ...

A neutron absorber control rod for use in a fuel assembly of a nuclear reactor is described comprising: (a) an elongated hollow tubular member having opposite ends and a hermetically sealed chamber; (b) neutron absorber material pellets contained in the chamber and located nearer to the trailing than to the leading end of the member. ...

A glaze forming composition is described for glazing nuclear fuel pellets with a burnable absorber, the composition comprising cadmium oxide (CdO) present in the range of about 50 to 95 percent by weight as a first burnable absorber and at least one glaze forming oxide.

The absorber was packed with sodium bifluoride (NaHF2) pellets. ... The heat treatment drove off HF from the sodium bifluoride. Com-. The absorber was ...

This standard provides analytical chemistry methods for the analysis of boron carbide powder and pellets.

Hybrid nuclear reactor grey rods are described, wherein geometric combinations of relatively weak neutron absorber materials such as stainless steel, zirconium or INCONEL, and relatively strong neutron absorber materials, such as hafnium, silver-indium cadmium and boron carbide, are used to obtain the reactivity worths required to reach zero boron change ...

Language: English ...

Although air weapons are considerably lower in power than other firearms, there is increasing concern that serious injuries can result from their misuse. The present study was therefore carried out to improve understanding of the terminal ballistic behaviour of air rifle pellets. Pellets were fired into ballistic gel under a variety of conditions. The ...

In storing of radioactive wastes by drying, pulverization and pelletizing, radioactive waste pellets are solidified with an alkali silicate solution as a filler, a substance having an action to harden the alkali silicate solution, and a substance having an action to absorb the water formed by the hardening reaction of the alkali ...

An attractive new limiter concept is investigated. The TRAIL (Tokamak Rail Gun Limiter) system impacts a stream of moderate velocity pellets (100 to 200 m/sec through the plasma edge region to absorb energy and define the plasma boundary. The pellets are ...

An attractive new limiter concept is investigated. The Tokamak Rail Gun Limiter (TRAIL) system impacts a stream of moderate velocity pellets (100 to 200 m/sec through the plasma edge region to absorb energy and define the plasma boundary. The pellets are ...

An annular burnable poison pellet of aluminium oxide - boron carbide (Al/sub 2/O/sub 3/ - B/sub 4/C) adapted for positioning in the annular space of concentrically disposed zircaloy tubes. Each tubular pellet is fabricated from Al/sub 2/O/sub 3/ powders of moderate sintering activity which serves as a matrix for B/sub 4/C medium size particle distribution. ...

This patent describes a nuclear reactor having a fuel assembly and a control rod moveable in and out for controlling the reactivity of the reactor, the control rod comprising: (a) an elongated tubular cladding; (b) means for closing the opposite ends of the cladding; (c) first pellets of a first type disposed within the cladding in an end-to-end relationship; and (d) second ...

... and habit of singing high above the ground. (Anthus spragueii) Date: May 2009 Sources: Committee on the Status ... http://bna.birds.cornell.edu/bna/species/439. Anthus spragueii ...

... habitat loss and disturbance caused by coastal development. (Limosa haemastica) Date: May 2009 Sources: Brown, S., C. Hickey, ... http://bna.birds.cornell.edu/bna/species/629.

A method of applying a burnable absorber coating on a nuclear fuel pellet comprising the step of exposing the nuclear fuel pellet to a gas stream of boron trichloride and anhydrous ammonia at a temperature of from about 600/sup 0/-800/sup 0/ C. A coating of boron nitride is formed as a reaction product of boron trichloride with ...

Integral fuel burnable absorbers (IFBA) are added to some rods in the fuel assembly to counteract excessive reactivity. These IFBA elements (usually boron or gadolinium) are presently incorporated in the UO(sub 2) pellets either by mixing in the pellets o...

... Condor, BNA accounts for the American White Pelican (Pelecanus erythrorhynchos) and the Mountain Plover (Charadrius montanus), a paper ... ...

An attractive new limiter concept is investigated. The Tokamak RAIl Gun Limiter (TRAIL) system directs a stream of moderate velocity pellets (100 to 200 m/s) through the plasma edge region to absorb energy and define the plasma boundary. The pellets are recycled, after cooling, to the injector in an electromagnetic mass accelerator. ...

An attractive limiter concept impacts a stream of moderate velocity pellets (100 to 200 m/sec) through the plasma edge region to absorb energy and define the plasma boundary. The pellets are recycled, after cooling, to the injector in an E-M mass accelerator. Heat fluxes of approximately 30,000 W/sq cm can be readily accommodated by ...

An attractive new limiter concept is investigated. The TRAIL (Tokamak Rail Gun Limiter) system impacts a stream of moderate velocity pellets (100 to 200 m/sec through the plasma edge region to absorb energy and define the plasma boundary. The pellets are recycled after cooling, to the injector of an E-M mass accelerator. Heat fluxes of ...

An improved annular burnable poison pellet of aluminum oxide-boron carbide (A1/sub 2/O/sub 3/-B/sub 4/C) adapted for positioning in the annular space of concentrically disposed zircaloy tubes. Each tubular pellet is fabricated from A1/sub 2/O/sub 3/ powders of moderate sintering activity which serves as a matrix for B/sub 4/C medium size particle ...

Birds are exposed to Pb by oral ingestion of spent Pb shot as grit. A paucity of data exists for retention and clearance of these particles in the bird gastrointestinal tract. In the current study, northern bobwhite quail (Colinus virginianus) were orally gavaged with 1, 5, or 10 Pb shot pellets, of 2-mm diameter, and radiographically followed over time. Blood Pb levels and ...

Plastic pellets found stranded on beaches are hydrophobic organic materials and thus, they are a favourable medium for persistent organic pollutants to absorb to. In the present study, plastic pellets are used to determine the diffuse pollution of selected Greek beaches. Samples of pellets were taken from these ...

The NCSU electrothermal plasma gun SIRENS has been used to accelerate plastic (Lexan polycarbonate) pellets, to determine the feasibility of the use of electrothermal guns as pellet injectors. The use of an electrothermal gun to inject frozen hydrogenic pellets requires a mechanism to provide protective shells (sabots) for shielding ...

Hydrogen sulfide is effectively removed from hot gaseous mixtures useful for industrial purposes by employing a solid absorbent consisting of silica-supported iron oxide in pellet form.

Spectra of absorbed molecules are usually studied by means of pressed disks of the adsorbent; an aluminum ring around the pellet of the die greatly facilitates the pressing. To eliminate undesired scattering of the radiation the particle size of the adsor...

In the present design of the control rod for the experimental Very High Temperature Gas-cooled Reactor, sintered pellets of boron carbide mixed with graphite are used as a neutron absorber, which are clad with the sheath material of Hastelloy XR. The sint...

This standard provides analytical chemistry methods for the analysis of boron carbide powder and pellets for the following: total C and B, B isotopic composition, soluble C and B, fluoride, chloride, metallic impurities, gas content, water, nitrogen, and oxygen. (DLC)

The purpose of this paper is to describe the planned use of an integral fuel burnable absorber (IFBA) in two demanding loading patterns. The IFBA used in a thin boride coating on the surface of the fuel pellet. Typically, approx.30% of the fuel rods in an assembly contain coated pellets. The first loading pattern is for a three-loop ...

Integral fuel burnable absorgers (IFBA) are added to some rods in the fuel assembly to counteract excessive reactivity. These IFBA elements (usually boron or gadolinium) are presently incorporated in the U)2 pellets either by mixing in the pellets or as coatings on the pellet surface. In either case, the incorporation of ifba into ...

This patent describes a method of cleaning a floating chemical spill on a body of water. It comprises: providing a quantity of popular bark-based pelleted or granular product, flotation means and a flexible net having openings generally smaller than the smallest whole pellet dimension of the pelleted product, spreading the net over a ...

An improved laser system and method for implosion of a thermonuclear fuel pellet in which that portion of a laser pulse reflected by the target pellet is utilized in the laser system to initiate a succeeding target implosion, and in which the energy stored in the laser system to amplify the initial laser pulse, but not completely ...

Acrylic fibers (pan fibers) absorb palladium from a hot solution of palladium nitrate in nitric acid. When palladium-loaded acrylic fibers are burned, fibers consisting of palladium and palladium oxide are formed. Reduction of this mixture with hydrogen produces fibers of palladium metal. The fibers may be compressed into pellets which offer less ...

Online (A. Poole, Ed.). Ithaca: Cornell Lab of Ornithology. Retrieved from http://bna.birds.cornell.edu/bna/species/672. Plentovich, S., N. R. Holler and G. E. Hill. 1999....

Poole, Ed.). Ithaca: Cornell Lab of Ornithology. Retrieved August 2009 from http://bna.birds.cornell.edu/bna/species/327. Species Profile from NatureServe 'I'iwi Vestiaria...

A small spherical, or cylindrical, pellet is imploded by an intensive, evenly distributed, short energy pulse. At the surface of the pellet the matter ionizes, its temperature and pressure rapidly rise, and the ablated plasma, by reaction, implodes the inner nucleus of the pellet. The involved structure of the energy ...

A fuel element is designed which is particularly adapted for reactors of high power density used to generate steam for the production of electricity. The fuel element consists of inner and outer concentric tubes forming an annular chamber within which is contained fissionable fuel pellet segments, wedge members interposed between the fuel segments, and a spring which, ...

AP2/ERF is a large family of transcription factors in plant. Genes in the AP2/ERF family encode transcriptional regulators with a variety of functions involved in the developmental and physiological processes in plants. Two AP2/ERF family transcriptional regulators (BnaERFB3-1 and BnaERFB3-2) were isolated from B. napus by in silico cloning method using ...

... 7. A study 3hould be conducted to estimste the timeliness and accuracy achievable by a ccm~uter-bnaed ditnge assessment system and the ...

Forty-eight materials were tested for their ability to absorb H2S from hot simulated producer gas (1,000F - 1,300F). The material found best from the standpoint of absorption capacity, durability, and amendability to regeneration was sintered pellets of 7...

A displacer rod for use in a mechanical spectral shift pressurized water nuclear reactor comprises a sectioned substantially hollow low neutron absorbing metal rod capable of displacing reactor coolant without absorbing a high amount of neutrons. The tubular sections can be made of stainless steel or Zircaloy tubing and may contain ...

Even using the same assay parameter, reagent and calibrator (N-latex RF kit II), the results of the assay for serum rheumatoid factors (RFs) with the Behring Nephelometer Analyzer (BNA) were higher than those with the Behring Nephelometer II Analyzer (BNII) ([BNII]=0.76 [BNA]-5.7 kIU/l, r=0.997, Sy/x=60.73, n=99). The mean bias (BNA ...

/BL*BL1GBLg,BL]*BLy BLaeBL �BM* BM*]BM1�BMaaBM��BMdRBM|TBM�`BM=BM�&BN* �BNA�BN��BN�BN`�BN�qBNVBNj|BN��BNa_BN BNaBN�. BNn*BJRBJ+BK ...

Two integrated core/scrape-off layer/divertor transport codes TOPICS-IB and JINTRAC with links to MHD stability codes are coupled with models of pellet injection to clarify effects of the pellet on the behaviour of edge-localized modes (ELMs). Both codes predict the following two triggering mechanisms. Energy absorption by the pellet ...

A novel pellet acceleration concept using millimetre microwaves from MW gyrotron sources is presented that could pave the way for high-speed >3 km s-1 inner-wall pellet injection on ITER-class tokamaks. In the proposed concept, the high gas pressure is created by vapourization of a composite 'pusher' medium attached behind the deuterium-tritium (DT) ...

Forty-eight materials were tested for their ability to absorb H/sub 2/S from hot simulated producer gas (1,000 - 1,300/sup 0/F). The material found best from the standpoint of absorption capacity, durability, and amendability to regeneration was sintered pellets of 75% fly ash - 25% Fe/sub 2/O/sub 3/. The performance of this absorbent ...

The removal of sulfur compounds from natural gas occupies an important place in a number of technological processes, including the production of ammonia and methanol. The influence of the conditions for pelleting granules of a zinc oxide absorbent on its pore structure, distribution of sulfur in the granules as well as the effect of desulfurization ...

An attractive new limiter concept is investigated. The TRAIL (Tokamak Rail Gun Limiter) system impacts a stream of moderate velocity pellets (100 to 200 m/sec through the plasma edge region to absorb energy and define the plasma boundary. The pellets are recycled, after cooling, to the injector in an E-M mass accelerator. Heat fluxes ...

An attractive new limiter concept is investigated. The Tokamak Rail Gun Limiter (TRAIL) system impacts a stream of moderate velocity pellets (100 to 200 m/sec through the plasma edge region to absorb energy and define the plasma boundary. The pellets are recycled, after cooling, to the injector in an E-M mass accelerator. Heat fluxes ...

An attractive new limiter concept is investigated. The Tokamak Rail Gun Limiter (TRAIL) system impacts a stream of moderate velocity pellets (100 to 200 m/sec) through the plasma edge region to absorb energy and define the plasma boundary. The pellets are recycled, after cooling, to the injector in an E-M mass accelerator. Heat fluxes ...

A dimensionally stable hydride composition and a method for making such a composition. The composition is made by forming particles of a metal hydride into porous granules, mixing the granules with a matrix material, forming the mixture into pellets, and sintering the pellets in the absence of oxygen. The ratio of matrix material to hydride is preferably ...

A dimensionally stable hydride composition and a method for making such a composition are disclosed. The composition is made by forming particles of a metal hydride into porous granules, mixing the granules with a matrix material, forming the mixture into pellets, and sintering the pellets in the absence of oxygen. The ratio of matrix material to hydride ...

By considering the ablatant to be a 4-species (H2, H, H+ and e?) reacting gas and assuming the validity of local thermodynamic equilibrium, the ablatant state of a hydrogen pellet during its passage in a tokamak is studied. Results of analysis showed that the pellet ablation rate is sensitive neither to the specific assumption regarding the variation of ...

Mixed depleted UO{sub 2} and PuO{sub 2} (MOX) pellets prototypic of fuel proposed for use in commercial power reactors were made with plutonium recovered from dismantled weapons. We characterized plutonium dioxide powders that were produced at the Los Alamos and Lawrence Livermore National Laboratories (LANL and LLNL) using various methods to recover the plutonium from weapons ...