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0. 20-m (8-in.) Primary Burner Development Report
High-Temperature Gas-Cooled Reactors (HTGRs) utilize graphite-base fuels. Fluidized-bed burners are being employed successfully in the experimental reprocessing of these fuels. The primary fluidized-bed burner is a unit operation in the reprocessing flowsheet in which the graphite moderator is removed. A detailed description of the development status of the 0.20-m (8-in.) diameter primary fluidized-bed burner as of July 1, 1977 is presented. Experimental work to date performed in 0.10; 0.20; and 0.40-m (4, 8, and 16 in.) diameter primary burners has demonstrated the feasibility of the primary burning process and, at the same time, has defined more clearly the areas in which additional experimental work is required. The design and recent operating history of the 0.20-m-diameter burner are discussed, with emphasis placed upon the evolution of the current design and operating philosophy.
Date:
December 1977
Creator:
Stula, R. T.; Young, D. T. & Rode, J. S.
Object Type:
Report
System:
The UNT Digital Library
1/5-scale experiment of a Mark I boiling-water reactor pressure-suppression system under hypothetical LOCA conditions
Experimental results show the sensitivity of hydrodynamically generated vertical loads to changes in the drywell pressurization rate, downcomer submergence, and vent-line loss coefficient. Insignificant effects on peak vertical loads were observed when the vent-line loss was varied. Peak vertical loads can be reduced by adding initial drywell overpressure so that the downcomers are partly cleared of water. Spatial variation of pressure at about the time of vent clearing is seen in comparisons of data from locations along the axis of the toroidal wetwell.
Date:
July 8, 1977
Creator:
Pitts, J. H. & McCauley, E. W.
Object Type:
Article
System:
The UNT Digital Library
2. 05 x 10/sup 9/ age of the Oklo uranium deposit
U and Pb isotopic data on samples (10 to 100 gram) 2 to 10 m away from the borders of the Oklo reactor zones indicate a primary age of 2.05 x 10/sup 9/ years for the Oklo deposit and a secondary age of 0.375 x 10/sup 9/ years. All samples show effects of Pb loss; the average loss is 50 percent. Both the U--Pb and Pb isotopic data are consistent with a model of a primary 2.05 x 10/sup 9/ year age of the deposit, continuous volume diffusion of Pb from uraninite, and either continuous or recent loss of this Pb. In this case the 0.375 x 10/sup 9/ year age is an artifact without time significance. Using an average value of D/a/sup 2/ 3.5 x 10/sup -11/ a/sup -1/ (Cowan, this conference) this model explains the apparent 1.8 x 10/sup 9/ year Pb age observed by other workers. From the /sup 208/Pb//sup 206/Pb data the average U/Th value calculated for the Oklo deposit is approximately 100.
Date:
January 1, 1977
Creator:
Gancarz, A. J.
Object Type:
Article
System:
The UNT Digital Library
2-mm microwave interferometer
A 2-mm microwave interferometer has been developed, and phase shift measurements have been made on the Baseball II experiment. The interferometer system employs a 140-GHz receiver for double down conversion of the plasma signal to a 60-MHz, IF frequency. The 140-GHz references signal is also down-converted and compared with the plasma signal to provide the desired phase change of the signal passing through the plasma. A feedback voltage from a 60-MHz discriminator to a voltage-controlled oscillator in the receiver provides frequency stability of the 60-MHz IF signals.
Date:
March 1, 1977
Creator:
Futch, A. H. & Mortensen, W. K.
Object Type:
Report
System:
The UNT Digital Library
2-MW plasmajet facility thermal tests of concrete. [PWR and BWR]
A test was made in the 2-Megawatt Plasmajet Facility to obtain experimental data relative to the thermal response of concrete to incident heat flux. 14.6 cm diameter by 8.0 cm long concrete cylinders were positioned in a supersonic flow of heated nitrogen from an arc heater. The end of the concrete cylinders impacted by the flow were subjected to heat fluxes in the range of 0.13 to 0.35 kW/cm/sup 2/. Measurements included cold wall surface heat flux and pressure distributions, surface and indepth temperatures, ablation rates, and surface emission spectrographs. The test was part of the Sandia light water reactor safety research program and complements similar tests made in the Radiant Heat Facility at heat fluxes from 0.03 to 0.12 kW/cm/sup 2/. A description of the tests and a tabulation of test data are included.
Date:
July 1, 1977
Creator:
Goin, Kenneth L.
Object Type:
Report
System:
The UNT Digital Library
3-D nonlinear evolution of MHD instabilities
The nonlinear evolution of ideal MHD internal instabilities is investigated in straight cylindrical geometry by means of a 3-D initial-value computer code. These instabilities are characterized by pairs of velocity vortex cells rolling off each other and helically twisted down the plasma column. The cells persist until the poloidal velocity saturates at a few tenths of the Alfven velocity. The nonlinear phase is characterized by convection around these essentially fixed vortex cells. For example, the initially centrally peaked temperature profile is convected out and around to form an annulus of high temperature surrounding a small region of lower temperature. Weak, centrally localized instabilities do not alter the edge of the plasma. Strong, large-scale instabilities, resulting from a stronger longitudinal equilibrium current, drive the plasma against the wall. After three examples of instability are analyzed in detail, the numerical methods and their verification are discussed.
Date:
March 1, 1977
Creator:
Bateman, G.; Hicks, H. R. & Wooten, J. W.
Object Type:
Report
System:
The UNT Digital Library
3-dimensional beam scanning system for particle radiation therapy
In radiation therapy treatment volumes up to several liters have to be irradiated. Today's charged particle programs use ridge filters, scattering foils, occluding rings collimators and boluses to shape the dose distribution. An alternative approach, scanning of a small diameter beam, is analyzed and tentative systems specifications are derived. Critical components are scheduled for fabrication and testing at LBL.
Date:
March 1977
Creator:
Leemann, C.; Alonso, J.; Grunder, H.; Hoyer, E.; Kalnins, G.; Rondeau, D. et al.
Object Type:
Article
System:
The UNT Digital Library
The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 1, Ed. 1 Monday, April 11, 1977
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
April 11, 1977
Creator:
Schott, Bobbie
Object Type:
Newspaper
System:
The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 2, Ed. 1 Monday, April 18, 1977
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
April 18, 1977
Creator:
Schott, Bobbie
Object Type:
Newspaper
System:
The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 3, Ed. 1 Monday, April 25, 1977
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
April 25, 1977
Creator:
Schott, Bobbie
Object Type:
Newspaper
System:
The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 4, Ed. 1 Monday, May 2, 1977
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
May 2, 1977
Creator:
Schott, Bobbie
Object Type:
Newspaper
System:
The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 5, Ed. 1 Monday, May 9, 1977
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
May 9, 1977
Creator:
Schott, Bobbie
Object Type:
Newspaper
System:
The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 6, Ed. 1 Monday, May 16, 1977
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
May 16, 1977
Creator:
Schott, Bobbie
Object Type:
Newspaper
System:
The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 7, Ed. 1 Monday, May 23, 1977
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
May 23, 1977
Creator:
Schott, Bobbie
Object Type:
Newspaper
System:
The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 8, Ed. 1 Monday, May 30, 1977
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
May 30, 1977
Creator:
Schott, Bobbie
Object Type:
Newspaper
System:
The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 9, Ed. 1 Monday, June 6, 1977
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
June 6, 1977
Creator:
Schott, Bobbie
Object Type:
Newspaper
System:
The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 10, Ed. 1 Monday, June 13, 1977
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
June 13, 1977
Creator:
Schott, Bobbie
Object Type:
Newspaper
System:
The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 11, Ed. 1 Monday, June 20, 1977
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
June 20, 1977
Creator:
Schott, Bobbie
Object Type:
Newspaper
System:
The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 12, Ed. 1 Monday, June 27, 1977
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
June 27, 1977
Creator:
Schott, Bobbie
Object Type:
Newspaper
System:
The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 13, Ed. 1 Monday, July 4, 1977
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
July 4, 1977
Creator:
Schott, Bobbie
Object Type:
Newspaper
System:
The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 14, Ed. 1 Monday, July 11, 1977
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
July 11, 1977
Creator:
Schott, Bobbie
Object Type:
Newspaper
System:
The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 15, Ed. 1 Monday, July 18, 1977
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
July 18, 1977
Creator:
Schott, Bobbie
Object Type:
Newspaper
System:
The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 16, Ed. 1 Monday, July 25, 1977
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
July 25, 1977
Creator:
Schott, Bobbie
Object Type:
Newspaper
System:
The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 17, Ed. 1 Monday, August 1, 1977
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
August 1, 1977
Creator:
Schott, Bobbie
Object Type:
Newspaper
System:
The Portal to Texas History