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Nuclear Science, IRE Transactions on

Issue 3 • Date July 1961

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Displaying Results 1 - 13 of 13
  • Table of contents

    Page(s): c1
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  • IRE Professional Group on Nuclear Science

    Page(s): c2
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  • A Digital Start-Up Control Uniit for Nuclecar Reactors

    Page(s): 1 - 12
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    The use of digital circuits for control of a nuclear reactor in the start-up range was proposed in a paper given by S. N. Lehr and V. P. Mathes at the Nuclear Engineering and Science Conference in 1959. A control of this type eliminates the many periodic adjustments that are required with linear circuits and results in a more accurate, reliable, and maintenance free unit. This paper describes the design and development of such a unit which computes and displays digitally the reactor level and period over nine decades of power. The level of the reactor is obtained from a discriminator and binary counter which resolve 2.5 m. v. pulses spaced as little as one microsecond apart. A time modulation technique incorporating binary counters for comparison and read-out is used to compute the period with a short term memory employed to provide statistical smoothing. View full abstract»

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  • Use of Entrance Hodoscope for Particle Identification in Very-High-Energy Blbble Chamber Experiments

    Page(s): 13 - 21
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    At energies of 10 Bev and higher, it is not easy to obtain physically separated beams of ¿ and ¿ mesons. We have constructed a hodoscope system which will register the identity of each of 20 particles entering a bubble chamber over a 100 microsecond time interval. Particles are localized by a scintillator hodoscope with matrix elements 1 cm square. Particle identity is determined with Cerenkov counters. The combined information is displayed on an oscilloscope and photographed at each bubble chamber expansion. View full abstract»

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  • The Log Count Rate Period Meter Used with Safety Circuits

    Page(s): 22 - 26
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    Equations are presented that give the probable rate of spurious reactor scrams due to counter noise in the period circuits commonly used at low reactor power. It is shown how a filter introduced to reduce the spurious scram rate, will delay the circuit response in the case of true emergencies. A numerical example shows that a compromise can be reached that gives a very satisfactory circuit. View full abstract»

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  • Proportional Control and Pressurizer Parameter Study of a Pressure Tube Reactor

    Page(s): 27 - 34
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    An investigation of the transient behavior of a pressure tube reactor indicated a definite need for external control to handle even normal load perturbations. Three proportional controllers were developed which were effective in containing the transients of the system for changes in load. A comparison of the three controllers indicated little preference between them with regard to variations in reactor power, primary loop temperature or system pressure. The final selection of a controller was thus an economic consideration. The result of the parameter study of the pressurizer indicated that a pressurizer size of 30 cubic feet, ¿ of the total volume of the primary coolant, was adequate for the containment of the pressure and volume surge transients. View full abstract»

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  • A Double-Delay-Line Clipped Linear Amplifier

    Page(s): 45 - 50
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    A compact transistorized linear amplifier has been designed that is suitable for many radiation counting applications. The amplifier delivers symmetrical double-delay-line differentiated output pulses, up to ± 10 volts in amplitude with a differential non-linearity of ± 1%. It tolerates input signals 400 times full scale without producing spurious output pulses. Both a prompt output and one delayed by two microseconds are available. The clipping lines and the signal delay line are all terminated at both ends so that physically small, relatively imperfect delay lines can be employed. Five amplifiers occupy only 12-¿ inches in a standard 19 inch relay rack. View full abstract»

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  • A Digital Data Handler for Pulsed Particle Accelerators

    Page(s): 51 - 56
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    This paper described a digital data handler for storing information in a magnetic core memory during the pulse of a synchrotron and transferring it to a slow memory during the dead time. Digital measurements of trajectory, pulse height, time of flight, run number, etc., are typical data. The magnetic core memory provides capacity for storing 32 words (events) of 96 bits during a burst. The information contained in the core memory is then transferred to one inch magnetic tape during the dead time of the accelerator. Thence the information may be fed to a computer for future study. For economy, the data handler has one buffer which serves as the input, output and shift register. View full abstract»

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  • Contributors

    Page(s): 57 - 59
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  • Eighth Annual PGNS Meeting-International Symposium on Aerospace Nuclear Propulsion

    Page(s): 60
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  • Information for authors

    Page(s): 60a
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  • Institutional listings

    Page(s): 60b
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Aims & Scope

This Transactions ceased production in 1962. The current retitled publication is IEEE Transactions on Nuclear Science.

Full Aims & Scope