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Fuel element design handbook

Description: The economic development of nuclear reactors depends upon the integrated progress in the fields of reactor design, fuel element design, reactor operation, and fuel production and separation. Broad criteria, which restrict the fuel element design, are determined by the mutual consideration of the problems encountered in all the above fields. Hence, no stage of reactor design or operation is independent of the fuel element problem, nor can the fuel element designer disregard the interest of any one field. As an introduction to the fuel element design problem, this chapter describes how the general criteria for a fuel element are determined.
Date: September 1, 1958
Creator: Merckx, K.R.
Partner: UNT Libraries Government Documents Department

Naval reactors physics handbook. Volume 3: The physics of intermediate spectrum reactors

Description: The present volume has been prepared for persons with some knowledge of the physics of nuclear reactors. It is intended to make available the accumulated physics experience of the Knolls Atomic Power Laboratory in its work on intermediate spectrum reactors. Only those portions have been selected which were deemed to be most useful and significant to other physicists concerned with the problems of reactor design. The volume is divided into four parts which are more or less independent of one another. Part 1 (Chaps. 2--9), Investigation of Reactor Characteristics by Critical Assemblies, reflects the importance of the properties of critical assemblies and of the techniques for obtaining experimental information about such assemblies. Part 2 (Chaps. 10--20), Reactivity Effects Associated with Reactor Operation, details the use of both critical assemblies and reactor theory to make and test predictions of the manner in which the reactivity of an intermediate power reactor will vary during operation. Part 3 (Chaps. 21--26), Heat Generation and Nuclear Materials Problems, considers how reactor heat generation is spread out in space and time, and what nuclear effects result from the presence of beryllium or sodium in the reactor. Part 4 (Chaps. 27--38), Reactor Kinetics and Temperature Coefficients, relates to the transient or near-transient behavior of intermediate reactors.
Date: September 1, 1958
Creator: Stehn, J.R.
Partner: UNT Libraries Government Documents Department

PINEX: The pinhole neutron experiment

Description: The pinhole neutron experiment is sometimes called ``Pinex``, a name which has also been used to describe the pin method of measuring the time required for imploding metals to travel to certain locations in space. The two experiments are not related and should not be confused with each other. The pinhole neutron experiment is very similar to the optical pinhole camera in which light passing through a pinhole in an opaque screen produces an inverted image of the source. In the pinhole neutron experiment 14 Mev neutrons from a thermonuclear device travel in straight.lines from their respective points of origin outward in all directions. Those which pass through a pinhole in an opaque neutron shield make an inverted neutron image of the source. Some of the neutrons which form the image are captured by threshold detector plates which have been suitably located behind the pinhole. Neutrons that have sufficient energy react with the nuclei of the detector plate to form radioactive nuclei that by their decay locate the position of the image on the plate. The image may be made visible by autoradiography or counting techniques. In the autoradiograph, an x-ray film is placed in contact with the image plate. As the radioactive nuclei decay, they expose the film. The image is visible when the film has been adequately exposed and developed. In the counting method, the image plate is cut into small pieces; each the size of a resolution element. Each piece is separately counted. The number of neutrons causing its radioactivity is determined and plotted on a drawing of the plate. These numbers indicate the shape of the D-T plasma at the time of ``burn``. It is the object of this paper to discuss the factors affecting the various parameters in the experiment and what information is required ...
Date: November 21, 1958
Creator: Sartain, C.C.
Partner: UNT Libraries Government Documents Department

Wooden explosives for woodcock

Description: The explosives group of the Chemistry Division has spent considerable time on the high explosives portion of the Woodcock program. The preliminary results obtained in the course of this investigation as well as data accumulated at other laboratories throughout the country are presented in this memorandum. Part I is concerned with the preparation and properties of the most promising `wooden` explosives (shock insensitive and high-temperature stable) explosives. Part II deals with several substitute explosives which could be used immediately in a hydrodynamic program. Part III presents a tentative schedule and indicates the role various groups at UCRL have agreed to play in the Woodcock explosives program for the next few weeks.
Date: July 23, 1958
Creator: Kury, J.
Partner: UNT Libraries Government Documents Department

Bonding of DATB progress report

Description: A series of DATB (diaximotrinitrobenzine) pressings were made in an effort to find the most suitable binder. The requirements for this binder were as follows: Thermal stability (Must be as stable as DATB or not show any reaction with DATB at 200 degrees C); Density (Must press to 95% theoretical or higher); Compressive Strength (Must be strong enough to machine, and stronger if possible); Moldability (Must be adaptable to isostatic pressing conditions). After investigating various materials such as epoxies, a high temperature silicon phenolic and Exon, it was found that, DATB could not be pressed at 110 degrees C and 20,000 psi to an acceptable density and strength. While a plastic binder is not needed for reasons of strength or desensitization, it may however be needed as a plasticizer to resist thermal shock. This can only be determined by the production of larger specimens at Site 300. Summarized data is presented.
Date: August 2, 1958
Creator: Archibald, P. B.
Partner: UNT Libraries Government Documents Department

Proposed gamma polarization experiment on an underground shot

Description: This memorandum represents a preliminary look at using a nuclear device as a source of polarized rays to perform a polarization experiment on the photoelectric effect. No intensities have been computed but just a look at the effect to be expected. It is anticipated that this would be a more difficult experiment to perform than the earlier proposed neutron polarization experiment. The theory of the experiment and the proposed experiment are described.
Date: August 8, 1958
Creator: McMaster, W.H.
Partner: UNT Libraries Government Documents Department

Progress report - bonding of DATB - progress report

Description: DATB (diaminotrinitrobenzine) pressings were made in an effort to find the most suitable binder. After successfully pressing ball milled DATB at 110 C,it was found that normal DATB (fine powder) could also be hot pressed at this temperature and 20,000 psi. Bulk density might vary from batch to batch.
Date: August 1, 1958
Creator: Archibald, P.
Partner: UNT Libraries Government Documents Department

Isthmus of tehuantepec

Description: this document is a preliminary report on the Isthmus of Tehuantepec as a location for a non-military application of nuclear devices. This report is a revised and combined version of two previous reports, and is intended to provide preliminary information to personnel within the Laboratory and will he used as a base or starting point by the Non-Military Applications Study Committee in developing a final report.
Date: March 1, 1958
Creator: Miles, R. A.
Partner: UNT Libraries Government Documents Department

Application of neutron monitors to process control in Recuplex. Status report

Description: A program was. initiated early in 1957 to develop a neutron monitor capable of detecting plutonium (Pu) concentration in process vessels in Recuplex. This followed an earlier application by Finished Products Operation and Research and Engineering of neutron monitoring to powder counting which had been successful and was being regularly used. The process vessel monitoring was to be done by the ``in tank probe`` method, utilizing the monitored solution as its own-moderator, and detecting the resulting slow and thermal neutrons with boron trifluoride (BF{sub 3}) type proportional counters. This report is intended to present the history of the Recuplex program; a summary of the development work to date; the current status of the monitoring system; and the immediate plans for future installations and work. This report is intended as a design guide for presently scheduled and future monitor installations in Recuplex and elsewhere of the types herein described. The report also includes calibration curves for both D-11 tank and H-3 column monitors, schematic representation of all installations, manual switching panel circuit diagram, pre-amplifier circuit diagram, probe well designs, and Kl-2 instrument tank design.
Date: July 14, 1958
Creator: Kelly, P. R. & Hildreth, N. T.
Partner: UNT Libraries Government Documents Department

A PRELIMINARY SURVEY OF SOME FLUORIDE COMPOUNDS - II

Description: These two parts were issued separately, but are cataloged as a unit. The two compounds Na/sub 4/U/sub 3/F/sub 17/ and Na/sub 3/Th/sub 2/F/sub 11/ were found to have a face-centered cubic structure. From parameter dimensions and intensity values these two compounds appear to be isomorphous. Na/sub 5/U/sub 3/F/sub 17/ has an identical cell size with alpha -Na/sub 2//UF/sub 6/. A group of three compounds (Rb/sub 2/ThF/sub Rb/sub 2/ZrF/sub 6/, and CsZrF/sub 6/) were reliably identified as being uniaxial by use of their optical properties. These compounds were tentatively indexed on the basis of data obtained from powder x-ray spectrometer patterns found to best fit a hexagonal unit cell. (W.L.H.)
Date: May 14, 1958
Creator: Harris, L.A.
Partner: UNT Libraries Government Documents Department

PAR Loop Schedule Review

Description: The schedule for the installation of the PAR slurry loop experiment in the South Facility of the ORR has been reviewed and revised. The design, fabrications and Installation is approximately two weeks behind schedule at this time due to many factors; however, indications are that this time can be made up. Design is estimated to be 75% complete, fabrication 32% complete and installation 12% complete.
Date: April 30, 1958
Creator: Schaffer, Jr. & W.F.
Partner: UNT Libraries Government Documents Department

PAR Loop Schedule Review

Description: The schedule for the installation of the PAR slurry loop experiment in the ┬ĚSouth Facility af the ORR has been reviewed and revised. Changed design philosophy to include maintainability of the loop auxiliaries required extension of the main construction period to the end of,June, with a three month period ending in September, for test and run in during which construction will be completed.
Date: February 28, 1958
Creator: Schaffer, Jr. & W.F.
Partner: UNT Libraries Government Documents Department

PAR Loop Schedule Review

Description: The status of the overall design, fabrication, and installation of the component items of the PAR loop experiment in the ORR is reviewed.
Date: January 15, 1958
Creator: Schaffer, Jr. & W.F.
Partner: UNT Libraries Government Documents Department

ORACLE Manual for Programmers

Description: The "ORACLE", Oak Ridge Automatic Computer and Logical Engine, was installed at Oak Ridge National Laboratory :in 1953 and.has been in operation since that time. This manual describes the machine's design, the number systems it uses, and its basic operations.
Date: January 22, 1958
Creator: Atta, Susie E.
Partner: UNT Libraries Government Documents Department

Transient Thermal Stresses in Pressure Vessels - Part II: Thermal Stress Calculation

Description: This report describes the second part of an IBM 704 Computer Code to determine transient thermal stress in pressure vessels. This part computes stresses from temperature distribution determined by the first part. A brief account is given of the solution of axially symmetric thermal stresses, using harmonic stress functions. This is followed by a description of the Code and complete input and operating instructions for a number of problems: a. Transient temperature distribution due to sudden change of temperature. b. Transient temperature distribution due to surface temperature changing as a function of time. c. Thermal stresses for temperature problems ( a ) or (b). d. Thermal stresses due to previously known temperature distribution. The code is known as TURF6. It was found that the computer results for thermal stresses in a solid sphere subjected to a sudden change of temperature at the surface corresponded within 5% of the theoretical values. The IBM 704 Computer required for this code has a 16 K memory, three drums and two tape units.
Date: April 30, 1958
Partner: UNT Libraries Government Documents Department

Environmental Contamination From Weapon Tests

Description: The program of the Atomic Energy Commission on environmental contamination from weapons tests is designed for the overall evaluation of the hazard to humans from test operations. It is limited to studies of the deposition of activity at long range rather than the problems associated with immediate, close-in fallout. The program has largely been a study of Sr{sup 90}, since considerations based on experience and measurement indicate that it is the isotope of greatest potential hazard. Data are presented pertinent to the monitoring of long-range fallout, particularly Sr{sup 90} and Cs{sup 137}. Values are tabulated for the fallout deposition, air concentrations, water concentrations, and the amounts in foods and human bone. In addition, results are given for some experimental investigations. The report of these results is not interpretative although certain papers that do attempt to interpret the present situation with respect to Sr{sup 90} in particular are reprinted. Bibliographies are presented covering the period since the 1957 hearings before the Joint Committee on Atomic Energy concerning the nature of radioactive fallout and its effects on man. A document list of submissions to the United Nations Scientific Committee on the Effects of Atomic Radiation is given to illustrate the work done in other countries. Several papers on the subject, which have not been generally available, are reprinted.
Date: October 1, 1958
Partner: UNT Libraries Government Documents Department