... Abstract : Control rods of the AFRRI-TRIGA reactor are routinely ... Descriptors : *RESEARCH REACTORS, CONTROL RODS, CALIBRATION, DATA ...

Considerable effort has been dedicated to ensuring the structural integrity of long rods during axial acceleration, but little work has addressed the subject of lateral acceleration of the sabot/rod package while it is still in-bore. Drysdale states ''Cer...

... of the model was an accelerator with 60 +/-% 5 percent phase acceptance under conditions of central rod potential, angular momentum, and transit ...

A single pull rod mechanism for actuating the contacts of each phase of a three-phase gas insulated circuit breaker arrangement utilizes acceleration springs only in relation to the second and third phases. Contact parting velocity is measured externally of the breaker thereby providing a check on the breaker operation without breaking the integrity of the ...

... C ROOTZO - SQUARE ROOT OF ZO, APPEARING OCCASIONALLY C Udotor - ORIGINAL ACCELERATION OF ROD / Uo C ... The Stark House ...

A control drive is described for the control rod for a sodiumcooled nuclear reactor with a pivoting cover consisting of a braced support and a motor device as well as an installation for the accelerated ejection of a control rod for emergency shutdowns. The control rod drive is characterized by parts for the ...

The shut-off mechanism described is provided with an accelerating device to speed up the drop of safety rods which are located above the core. The accelerating device imparts a collision momentum to the rods, the collision energy being released in fractions of milliseconds. (NPO)

The complex dependence of the reactivity-time function {rho}(t) for the HERBE safety rods during reactor shutdown is determined by combining both previously obtained reactivity worth data {rho}(z) and measurements of safety rod trajectory z(t). The integral reactivity-time function of the safety rods {rho}(T), including the ...

An RFQ resonator for a linear accelerator having a reduced level of interfering modes and producing a quadrupole mode for focusing, bunching and accelerating beams of heavy charged particles, with the construction being characterized by four elongated resonating rods within a cylinder with the rods being ...

A four-cylinder-Stirling-engine, transient-engine-simulation computer program is presented. The program is intended for controls analysis. The associated engine model has been simplified to shorten computer calculation time. The model includes engine mechanical drive dynamics and vehicle load effects. The computer program also includes subroutines that allow (1) acceleration ...

The performance of a 4-Mv linear accelerator in routine clinical service is evaluated after 5 years' service. Routine maintenance procedure' s are also discussed. (C.H.)

The acoustic wave generation in a specimen irradiated by a pulsed microwave is predicted theoretically. The specimen is a viscoelastic rod inserted into a wave guide. The model is based on Maxwell's equations, heat equation and thermoviscoelasticity theory. Computations show the presence of temperature oscillations due to the electromagnetic interferences in the irradiated ...

The relation between the strain in an elastic wave traveling along a slender rod and the acceleration of a free end as the wave reflects from that end is given by the equation epsilon = 1/(2c)integral adt, where a = acceleration, c = wave velocity, and epsilon = strain in the rod. An air gun and projectiles have ...

... Exposure to strong acids in aqueous environments appeared to accelerate ... This suggests that any residual phosphoric acid present may contribute ...

... a part out of the seeded boron beam which ... and are accelerated towards a stainless steel target coated ... the grid and the quadrupole rods): 36 eV. ...

The report documents a computer code which has been implemented to position control rods according to a prescribed schedule during the calculation of a reactor history. Control rods may be represented explicitly with or without internal black absorber conditions in selected energy groups, or fractional insertion may be done, or both, in a problem. There is ...

During a routine quarterly inspection of the boron-carbide control rods of the Omaha Veterans Administration Hospital 18 kW Triga Mark I reactor, a pin hole leak was detected approximately 3 mm from the chamfered edge. The leak was found by observing bubbles when the rod was withdrawn from the reactor tank for visual observation, and ...

The rod photoreceptors are implicated in a number of devastating retinal diseases. However, routine imaging of these cells has remained elusive, even with the advent of adaptive optics imaging. Here, we present the first in vivo images of the contiguous rod photoreceptor mosaic in nine healthy human subjects. The images were collected ...

The rod photoreceptors are implicated in a number of devastating retinal diseases. However, routine imaging of these cells has remained elusive, even with the advent of adaptive optics imaging. Here, we present the first in vivo images of the contiguous rod photoreceptor mosaic in nine healthy human subjects. The images were collected ...

The relation between the strain in an elastic wave traveling along a slender rod and the acceleration of a free end as the wave reflects from that end is given by the equation epsilon = 1/(2c)integral adt, where a = acceleration, c = wave velocity, and ep...

An accelerated test for screening potential PCI remedy designs was developed. Fuel rods were designed with a tight diametral fuel-cladding gap and a reduced cladding wall thickness and irradiated in the General Electric Test Reactor. After irradiation at ...

Angularly accelerating a cantilevered rod which sags under gravity couples the out-of-plane dynamics of the flexible rod and causes oscillation in both the horizontal and vertical planes. A parameter-scheduled trajectory planner has been analytically deve...

We describe experimental measurements and hydrocode simulations of two tests in which long (L/D=12), steel rods were accelerated laterally with charges of Detasheet-C high explosive (HE). In each test configuration, 84 rods were initially aligned parallel...

Matching sucker rod pump characteristics to a specific application is greatly simplified with this program, intended for use with an HP-41CV hand-held computer. The user inputs application data and the program calculates all necessary design criteria, including Mill's acceleration factor, peak and minimum polish rod loads and ...

The F1ash:Ti laser in the Polarized Light Source at the Stanford Linear Accelerator Center (SLAC) is used to obtain spin polarized electrons for high-energy particle physics experiments. The F1ash:Ti laser utilizes titanium-doped sapphire (Ti:Sapphire) crystals to produce laser light. The properties of these crystals, or laser rods, greatly affect the ...

During the routine positioning of partial-length control rods in Gang 3 on the afternoon of Monday, July 27, 1992, the partial-length rods continued to drive into the reactor even after the operator released the controlling toggle switch. In response to this occurrence, the Safety Analysis and Engineering Services Group (SAEG) ...

Four routine shutdowns were experienced during the month. A measurable amount of the excess reactivity held in the control rods at the first of the month has been lost in the decrease in the average accumulated exposure of all the metal in the pile. The vertical safety rod guides have been measured for vertical alignment by the ...

The dispersion relation of symmetrical TM waves (usual operating mode of a traveling wave tube) propagating in a Cerenkov maser including a thin annular relativistic electron beam (TAREB), a strongly magnetized plasma column, and a dielectric rod is investigated. The effects of relative permittivity constant of dielectric rod, ...

The planned target for the Accelerator Production of Tritium (APT) neutron source consists of an array of tungsten rod bundles through which D{sub 2}O coolant flows axially. Here, a scoping analysis of flow through an APT target rod bundle was conducted to demonstrate that lateral cross-flows are important, and therefore subchannel ...

A calculation is given of the radiated energy loss from a charged rod which moves at constant speed past an infinite set of parallel semi-infinite conducting plates of infinitesimal thickness, with the rod taken parallel to and at a fixed distance from the plate edges. The problem is analyzed using the Wiener-Hopf technique, and the resulting formulas are ...

The neutron Radiography Reactor (NRAD) is a training, research, and isotope (TRIGA) reactor located at the INL. The reactor is normally shut down by the insertion of three control rods that drop into the core when power is removed from electromagnets. During a routine shutdown, indicator lights on the console showed that one of the control ...

... from Soviet Technical Literature, September 1973,. ... all current laser material is routinely ... accelerators, Electron beams, Materials, Solid state physics ...

... from Soviet Technical Literature, October 1973,. ... effects; all current material is routinely ... accelerators, Electron beams, Materials, Solid state physics ...

... from Soviet Technical Literature, November, 1973,. ... all current laser material is routinely ... accelerators, Electron beams, Materials, Solid state physics ...

... from Soviet Technical Literature, August 1973,. ... all current laser material is routinely ... accelerators, Electron beams, Materials, Solid state physics ...

The two ways in which Monte Carlo computer calculations may be accelerated are discussed. The two types of acceleration, each of which may be considered independent of the other, are called subroutine acceleration and convergence acceleration. Subroutine acceleration is obtained by ...

A twin rod-conduction calorimeter for routine assay of small radioactive sources is described. The equilibration time is about forty minutes and the detection limit about 1 x 10/sup -4/ watt. A thermistor circuit and nonlinear potentiometer are used for the differential temperature measurement. Use of a plutonium sample for calibration is ...

This paper presents results from simulations of beam losses during the operation of a superconducting accelerator. The calculations use a combination of hadron/electromagnetic cascade plus elastic scattering codes with accelerator tracking routines. These calculations have been used in conjunction with the design of the Fermilab ...

With the development of the new arc-heated cathode PIG type source, heavy-ion acceleration in the SF cyclotron has been drastically augmented, which means that a stable routine operation is being realized as well as the number of ion species being increas...

A conceptual design was developed for the target/blanket system of an accelerator-based system to produce tritium. The target/blanket system uses clad tungsten rods for a spallation target and clad lead rods as a neutron multiplier in a blanket surrounding the target. The neutrons produce tritium in {sup 3}He, which is contained in ...

The isotropic-to-nematic transition in an athermal solution of long rigid rods subject to a gravitational (or centrifugal) field is theoretically considered in the Onsager approximation. The new feature emerging in the presence of gravity is a concentration gradient that coupled with the nematic ordering. For rodlike molecules this effect becomes noticeable at centrifugal ...

A new type of shut-off rod of electro-mechanical design was developed by the American Machine and Foundry Company for use in the NRX reactor following the accident of 1952. The new rods were installed in May, 1956, as part of the control system conversion program which was completed in 1958. Some problems were encountered with limit switch adjustment but ...

Periods of continuously decreasing levels of fuel rod integrity due to debris-induced cladding damage, vibration-induced fretting wear of the cladding, etc. cause difficulties in the assessment of fuel rod performance from coolant activity data. The calculational models currently in use for this purpose in nuclear power plants are not sufficiently capable ...

Optical waveguide lightmode spectroscopy has been used to observe the deposition of bacterial flagellar filaments of mean length 350 nm from bulk solution onto a smooth planar substratum, chemically modified to covalently bind the flagellar filaments on contact. At the highest practicable bulk concentration, the filaments follow the theoretically predicted kinetics of random sequential addition of ...

Development of the $sup 252$Cf fuel rod scanning system is described. The feasibility of the technique was demonstrated and a scanning system was devised, with $sup 252$Cf as a source of neutrons, which fulfilled the following requirements: (a) thermal neutron flux in the vicinity of 5 x 10$sup 6$ n-cm$sup - 2$-s$sup -1$ with a $sup 235$U; $sup 238$U fission ratio of ...

Accelerators for producing commonly used short-lived positron emitters for positron emission tomography are addressed in the context of their use for the preparation of labeled compounds for research and routine biomedical applications. Progress and direction in the preparation and use of radiotracers for studies of the brain are discussed. Advancement to ...

A simulation programme is described which compares the efficiency of laboratory work schedules. The number of days' delay on a sample of request forms submitted to a routine biochemistry laboratory has been calculated for each of three schedules. Analysis of the results indicated that this method of comparing existing and potential work routines is likely ...

GPU acceleration of the dynamics routine in the HIRLAM weather forecast model Van Thieu Vu1 Gerard GPU card using the Compute Unified Device Archi- tecture (CUDA) as parallel programming model. We optimization. On a single GPU, we observe speed- ups by an order of magnitude over our hosting CPU (Intel quad

Purpose. Rod photoreceptors are exquisitely sensitive light detectors that function in dim light. The timely inactivation of their light responses is critical for the ability of rods to reliably detect and count photons. A key step in the inactivation of the rod transduction is the phosphorylation of the rod visual ...

NEWIGL solves the one-dimensional, two-energy group, time-dependent diffusion theory equations using zero, one, or six delayed neutron goups. Thermal feedback is introduced through the solution of simplified, non-boiling heat transfer equations. Geometrical representation can be slab, cylindrical, or spherical. Steady-state diffusion theory routines are included and can be ...

For the accelerator production of tritium (APT), the accelerator driven transmutation facility (ADTF), and the advanced fuel cycle initiative (AFCI), tungsten is being proposed as a target material to produce neutrons. In this study, tungsten rods were irradiated at the 800MeV Los Alamos Neutron Science Center (LANSCE) proton ...

The CMEE (Computational Modules for Electron Effects) library is a collection of computer routines for numerical modeling of electron effects in accelerator and plasma physics codes. The goal of this library is to make these numerical models available to any code in need of electron effects modeling, including high-power microwave codes, fusion wall ...

Experiments at SNL are underway to investigate plasma formation in rod pinch diodes fielded in negative polarity on the RITS-6 accelerator (7.5MV and 180kA at 40 Ohms). The rod pinch diode consists of a small diameter metal rod which extends through a larger diameter metal cathode plate. Electrons formed at the ...

The ISAC facility at TRIUMF utilizes up to 100 ?A from the 500 MeV H- cyclotron to produce the RIB using the Isotopic Separation On Line (ISOL) method. The ISAC-I facility comprised the RNB production target stations, the mass separator and the beam delivery to low energy area and to a room temperature linear accelerator composed of a 4-rod RFQ and an ...

The ISAC facility at TRIUMF utilizes up to 100 ?A from the 500 MeV H- cyclotron to produce the radioactive ion beam (RIB) using the isotopic separation on line method. The ISAC-I facility comprised the RIB production target stations, the mass separator, and the beam delivery to low energy area and to a room temperature linear accelerator composed of a ...

The ISAC facility at TRIUMF utilizes up to 100 {mu}A from the 500 MeV H{sup -} cyclotron to produce the radioactive ion beam (RIB) using the isotopic separation on line method. The ISAC-I facility comprised the RIB production target stations, the mass separator, and the beam delivery to low energy area and to a room temperature linear accelerator composed of a ...

Results from an instrumented fuel assembly irradiation program being performed at Halden, Norway, are reported. Accelerated pellet-cladding interaction modeling is being conducted to predict the probability of fuel rod failure under normal operating condi...

Results from an instrumented fuel assembly irradiation program being performed at Halden, Norway, are reported. Accelerated pellet-cladding interaction modeling is being conducted to predict the probability of fuel rod failure under normal operating condi...

Results from an instrumented fuel assembly irradiation program being performed at Halden, Norway, are reported. Accelerated pellet-cladding interaction modeling is being conducted to predict the probability of fuel rod failure under normal operating condi...

Results from an instrumented fuel assembly irradiation program being performed at Halden, Norway, are reported. Accelerated pellet-cladding interaction modeling is being conducted to predict the probability of fuel rod failure under normal operating condi...

A simple and reliable method of making accurate proton beam profiles at accelerator energies is described. The profile is obtained by counting the proton-induced /sup 24/Na activity which occurs when a proton beam strikes an array of aluminum rods. (auth)

Mass, Force Bob Moyer (505) 844-3738 Microwave Dave Krukar (505) 844-5944 Flow, Acceleration, Shock, Humidity. Rod Mahoney (505) 845-3295 AC Electrical Bud Burns (505) 844-5460...

To overcomoe the problems of disposal of radioactive fission products, this patent suggests exposing themo to radiation to convert themo into stable or short-lived isotopes. This may be done either in an accelerator or in a reactor e.g. in the fuel rods or mooderator of a heterogeneous reactor or in pipes or the control rods ...

A method for applying novel coatings to substrates is provided. The ends of multiplicity of rods of different materials are melted by focused beams of laser light. Individual electric fields are applied to each of the molten rod ends, thereby ejecting charged particles that include droplets, atomic clusters, molecules, and atoms. The charged particles are ...

The methodology and analysis used to characterize the structural performance of a sabot/rod as it is subjected to lateral and axial loading during launch is presented. The method described incorporates both experimental and numerical phases in the evaluation. 9 refs., 10 figs., 2 tabs.

We describe experimental measurements and hydrocode simulations of two tests in which long (L/D=12), steel rods were accelerated laterally with charges of Detasheet-C high explosive (HE). In each test configuration, 84 rods were initially aligned parallel to one another in an array of four concentric rings. The first test had a central ...

This report provides calculations and calculation checks on the outer shutdown system, consisting of eight shutdown rods located on the outside of the core. The function of the system is to scram the reactor, or to break the chain reaction of the fission process. The shutdown rods are clad with a neutron-absorbing material (i.e., hafnium) to achieve scram. ...

The Fernald Environmental Management Project is unique among Department of Energy (DOE) sites by virtue of successful efforts by the Fernald Environmental Restoration Management Corporation (FERMCO) and DOE-Fernald Area Office (FN) in securing a stak-eholder-assisted final site closure vision and all Record of Decisions (ROD) or Interim RODs required to ...

Several accelerator-based neutron capture therapy applications are under development. These applications include boron neutron capture therapy for glioblastoma multiform and boron neutron capture synovectomy (BNCS) for rheumatoid arthritis. These modalities use accelerator-based charged-particle reactions to create a suitable neutron source. Neutrons are ...

Beam commissioning of a new 4 rod RFQ has started at Brookhaven National Laboratory (BNL). The RFQ will accelerate intense heavy ion beams provided by an Electron Beam ion Source (EBIS) up to 300 keV/u. The RFQ will accelerate a range of Q/M from 1 to 1/6, and the accelerated beam will be finally delivered to the ...

To satisfy experiment needs for Sandia's Advanced Reactor Safety Program, a programmable Transient Rod Withdrawal (TRW) mode has been developed for the Annular Core Research Reactor (ACRR). The programmable mode is a modification of the existing continuous-withdrawal TRW mode and permits speed and direction changes during the pulse sequence. Basically, a TRW operation ...

We describe an Accelerator Mass Spectrometer to be operated by TRIUMF Applied Programs for a consortium of earth scientists. The equipment will provide routine determinations of UC, Be and SWAl in mg-sized samples derived from natural materials. The measurement system is designed around a used, but suitably upgraded, EN Tandem Van de Graaff ...

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