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Inspection methods for physical protection. Task II. Review of research reactor licensees' physical security practices
Security systems and security procedures for the AFRRI reactor, the University of Maryland TRIGA reactor, and the University of Virginia CAVALIER and UVAR reactors are described.
Date:
July 3, 1980
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Low-Cost Solar Array Project. Task I. Silicon material: investigation of the hydrogenation of SiCl/sub 4/. Fifth quarterly report
Reaction kinetic measurements on the hydrochlorination of SiCl/sub 4/ and mg silicon metal in the presence of a copper catalyst were last reported as a function of reaction temperature, reactor pressure and H/sub 2//SiCl/sub 4/ ratio, 3 SiCl/sub 4/ + 2 H/sub 2/ + Si ..-->.. 4 SiHCl/sub 3/. The same reaction was repeated at a lower catalyst loading of 2 wt%. In the presence of 2 wt% cuprous chloride (based on silicon metal), the hydrochlorination reaction rate is doubled to give about the same performance as those obtained at a higher copper catalyst loading. The effect of particle size distribution of the mg silicon metal on the hydrochlorination reaction rate was studied. Reaction kinetic measurements were made on 150 x 400 mesh Si and on 32 x 65 mesh Si in addition to the standard 65 x 150 mesh Si used in previous studies. Results of these experiments show that the reaction rate is essentially independent of the silicon metal particle size. Thus, the reaction occuring on the Si metal surface is the rate-determining step. Mass transfer via diffusion of reactants and product is not rate-limiting. A plausible mechanism of the hydrochlorination reaction is discussed.
Date:
July 3, 1980
Creator:
Mui, J. Y. P.
Object Type:
Report
System:
The UNT Digital Library
Comparison between calculation and measurement of energy deposited by 800 MeV protons
The High Energy Transport Code, HETC, was obtained from the Radiation Shielding Information Center (RSIC) at Oak Ridge National Laboratory and altered as necessary to run on a CDC 7600 using the LTSS software in use at LLNL. HETC was then used to obtain calculated estimates of energy deposited, for comparison with a series of benchmark experiments done by LLNL. These experiments used proton beams of various energies incident on well-defined composite targets in good geometry. In this report, two aspects of the comparison between calculated and experimental energy depositions from an 800 MeV proton beam are discussed. Both aspects involve the fact that workers at SAI had previously used their version of HETC to calculate this experiment and reported their comparison with the measured data. The first aspect addressed is that their calculated data and LLNL calculations do not agree, suggesting an error in the conversion process from the RSIC code. The second aspect is not independent of the first, but is of sufficient importance to merit separate emphasis. It is that the SAI calculations agree well with experiments at the detector plate located some distance from the shower plate, whereas the LLNL calculations show a clearcut discrepancy there …
Date:
April 3, 1980
Creator:
Loewe, W.E.
Object Type:
Report
System:
The UNT Digital Library
CAMAC serial highway interface for the LSI-11
A CAMAC Serial Highway Interface has been designed for the Local Control and Instrumentation System of the Mirror Fusion Test Facility. There are over 50 distinguishable systems in the facility, each of which consists of the LSI-11 computer, fiber optic communication links, and the CAMAC system. The LSI-11 computer includes a 32k memory, serial modem interface and the CAMAC Serial Highway Interface.
Date:
April 3, 1980
Creator:
Lau, N.H.
Object Type:
Article
System:
The UNT Digital Library
Defluoridation study for Boise geothermal water
Methods of removing fluorides from water are reviewed and recommendations are made for treating geothermal water used by the Boise Geothermal Project, Boise, Idaho. The Boise geothermal water except for its high fluoride content would be high quality, suitable for primary drinking water. Fluoride ranges from about 15 to 25 mg/l in water from various wells in the Boise region where the Project plans to obtain hot water. Four techniques for removing fluorides from water have been studied extensively during the past 15 years or so. Electrodialysis and reverse osmosis are useful in reducing total dissolved solids from brackish water, but are nonspecific and are too expensive for treatment of the Boise geothermal water. Selective precipitation is a widely used technique for treating water, but would also prove expensive for the Boise geothermal water because of the relatively high solubility of fluoride salts and consequently high concentration (and cost) of precipitants required to reduce the fluorides to an acceptable level. Ion-exchange separation using activated alumina as the exchange medium appears to be the most promising technique and we recommend that some laboratory and pilot studies be conducted to establish suitability and operating boundaries.
Date:
June 3, 1980
Creator:
Rigdon, L.
Object Type:
Report
System:
The UNT Digital Library
Microchannel plate as a detector of minimum ionizing particle
Micro-channel plate multipliers have been used to detect the passage of relativistic charged particles. Measurements of the detection efficiency and pulse height response versus micro-channel plate gain are presented for one, two and three micro-channel plate arrays. The probability of detecting an avalanche on the detector anode per one channel of MCP crossed by the relativistic particle was calculated. Temporal response and time jitter were measured and are reported. The track images of beam particles crossing the detector are shown.
Date:
September 3, 1980
Creator:
Oba, K; Rehak, P & Smith, S D
Object Type:
Article
System:
The UNT Digital Library
Beam loss by collimation in a neutralizer duct
Beam fractions lost by collimation in a neutralizer duct are computed in x-x' phase space by using three examples of slab beam distributions under a broad range of duct dimensions, beam half-widths, and beam divergences. The results can be used to design compact neutralizers and to specify beam requirements. The computer code ILOST can be used under a broad range of beam conditions to compute the fraction lost by collimation.
Date:
April 3, 1980
Creator:
Hamilton, G.W. & Willmann, P.A.
Object Type:
Report
System:
The UNT Digital Library
Serial interprocessor communications system
A serial communications system based on the EIA RS232-C standard with modem control lines has been developed. The DLV11-E interface is used for this purpose. All handshaking is done with the modem control lines. This allows totally independent full duplex communication. The message format consists of eight bit data with odd parity and a sixteen bit checksum on the whole message. All communications are fully interrupt driven. A program was written to load a program into a remote LSI-11 using the serial line without bootstrap ROM.
Date:
April 3, 1980
Creator:
Labiak, W.; Siemens, P. & Bailey, C.
Object Type:
Article
System:
The UNT Digital Library
[Photograph 2012.201.B0103.0223]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "J. C. Brady, Norman , chairman of the Stained Glass Association of the Southwest , examines a Victorian arch one of the stained glass pieces on display through Oct. 25 at O U's .."
Date:
October 3, 1980
Creator:
Longstreath, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0135.0494]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Stephen Clapp, left, and Michael Trimble chat with Mrs. Sam Cerny, president of the Women's Committee of the Symphony, about the more than 70 young musicians who competed."
Date:
March 3, 1980
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0150.0325]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Earl Eaton . . . litter collector found canceled checks."
Date:
December 3, 1980
Creator:
Albright, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0172.0467]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Bags of a substance believed to be marijuana are among evidence confiscated or purchased during probe."
Date:
March 3, 1980
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0153.0634]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Debbie Davenport, Won interior decorating contest, Vicky Parker"
Date:
March 3, 1980
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0158.0166]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Preschoolers ham it up for the camera during a recent trip to the Del City Municipal Pool."
Date:
June 3, 1980
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0135.0709]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
July 3, 1980
Creator:
Tullous, Don
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0141.0441]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Mr. and Mrs. Leslie Conner Jr., City Attorney."
Date:
May 3, 1980
Creator:
Longstreath, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0150.0326]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
December 3, 1980
Creator:
Albright, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0144.0694]
Caption: "there's a mountain of cottonseed at the Altus Cotton Oil Mill and it's getting bigger every day."
Date:
January 3, 1980
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0143.0132]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Clarissa Cooper reads a poem on brotherhood during the Brotherhood Assembly at Northwest."
Date:
March 3, 1980
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0138.0458]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Mary Cody, center, is comforted by her husband Kenneth and friend Jeannie Meschnark as the home burns in the background. The fire started when a burned log rolled from the fireplace and set the floor on ablaze."
Date:
January 3, 1980
Creator:
Buehner, Jeff
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Practical aspects of rf acceleration for MFE injection
Several practical aspects of rf acceleration (by a MEQALAC accelerator, for example) of positive and negative ions for MFE neutral injection were considered. The beam transport, gas flow, differential pumping, and compatibility with MFE beam lines were examined. It was found that rf acceleration has several advantages over dc acceleration, especially if high energy (over 100 keV) and/or high purity (over 99%) is required. Therefore rf acceleration should be considered especially in connection with negative ions, which also have competitive advantages under such requirements. Beam densities for rf may be lower than dc beam densities because of space charge limitations and electrode transparency. However, the overall dimensions of an rf system are competitive with or smaller than the dimensions of a dc system of equal current and voltage because the gas pumping and electrical insulation are included within the rf electrode assembly. Ion source development is required to produce an array of many small beams suitable for injection into a MEQALAC.
Date:
June 3, 1980
Creator:
Hamilton, G.W. & Fink, J.H.
Object Type:
Report
System:
The UNT Digital Library
Rutherford scattering of neutral atoms: a technique for measuring plasma ion temperatures. An analysis of the applicability to the central cell plasma of TMX
Rutherford scattering of neutral particles by plasma ions is examined as a method for determining plasma ion in the central cell fo the Tandem Mirror Experiment (TMX). When a scattering configuration, consisting of a 20-keV-, 10-A-deuterium neutral beam and an energy analyzer with a 1% resolution, is arranged such that only neutral particles scattered by plasma ions over an angle of 10/sup 0/ are accepted, central-cell ion temperatures in the 30- to 1000-eV range can be measured. The count rate registered by the detector(s) is estimated to be 2000 counts/ms. Consequently, good statistical accuracy and time resolution are attainable simultaneously. The results of the calculation are presented such that the scaling of the count rates and the energy broadening with scattering angle, neutral-beam energy, ion temperature, and plasma density can easily be deduced. Neutral helium beams are also considered; they have some advantages over deuterium beams. The background signal, caused by neutral particles entering the detector after two successive charge-exchange collisions, is examined and ways to completely eliminate this background are indicated.
Date:
June 3, 1980
Creator:
Granneman, E.H.A.
Object Type:
Report
System:
The UNT Digital Library
CO/sub 2/-laser polishing of fused silica surfaces for increased laser damage resistance at 1. 06. mu. m
Bare fused silica surfaces were prepared by subjecting the mechanically polished surface to a rastered cw CO/sub 2/ laser beam. Analysis shows that this processing causes: (a) removal of a uniform layer of fused silica; and (b) a probable re-fusing or healing of existing subsurface fractures. The fused silica removal rate is found to be a function of the laser intensity and scan rate. These surfaces are seen to have very low scatter and to be very smooth. In addition, they have exhibited entrance surface damage thresholds at 1.06 ..mu..m, and 1 nsec, which are substantially above those seen on the mechanically polished surface. When damage does occur, it tends to be at a few isolated points rather than the general uniform damage seen on the mechanicaly polished part. In addition to the damage results, we will discuss an observational technique used for viewing these surfaces which employs dark-field illumination.
Date:
April 3, 1980
Creator:
Temple, P. A.; Milam, D. & Lowdermilk, W. H.
Object Type:
Article
System:
The UNT Digital Library
Local energy transfer to TLDS by neutrons and photons
The local energy transferred from neutrons and photons to TLD materials with respect to energy transferred to biological tissues or air has been calculated. Experimental response of TLDs was measured for photons with energies above 1.5 keV.
Date:
March 3, 1980
Creator:
Singh, M. S.; Gaines, J. L. & Parlagreco, J. R.
Object Type:
Article
System:
The UNT Digital Library