Diffusion coefficients for hydrogen in beta zirconium were determined from permeation rates in the range 650 to 850 deg C. Both the steady-state method, which is dependent upon the hydrogen concentration, and the time-lag method, which is independent of hydrogen concentration, were employed to obtain diffusion data. Zirconium disks, 0.03 to 0.1 cm thick and varying in hydrogen concentration from 9 to 33 at.%, were used to measure permeation rates. The diffusion coefficients determined by the steady-state and time-lag methods on samples of differing thickness were in agreement. It was concluded that the permeation process was diffusion controlled. The diffusion coefficients were found to be independent of concentration and can be expressed by D = 6.14 x 10/ sup 4/ exp (--45,900/RT). (auth)

Daily newspaper from Stillwater, Oklahoma that includes local, state, and national news along with advertising.

Daily newspaper from Alva, Oklahoma that includes local, state, and national news along with advertising.

The measured diffusivity of uranyl nitrate in water at 25 ction prod- C was 0.7 x 10/sup -6/ cm/sup 2//sec with about 40% average deviation. A program was started to develop nonnuclear uses for depleted uranium. Two continuous DRUHM reaction runs were terminated due to erratic operation of the sodium metering system. In the second Fluorox run with crude UF/sub 4/ which lasted for 29 hr, a total material balance of 94.8% was obtained and 17.9% of the theoretical amount of UF/sub 6/ was collected in cold traps and chemical traps. Room temperature flow rate-pressure drop calibrations of a multiclone (thirteen 0.60-in. diam hydroclones in parallel) for installation with the HRT replacement circulating pump were completed. Mixed oxides of U : Th = 0.08 : 1 and all have low yield stresses of 0.02 to 0.05 lb/sq ft compared to 0.2 to 1.0 lb/sq ft for normal Th-U or Th oxides of 1.5 to 2.5 micron mean diameter. The rates of uranium anion exchange from solutions containing between 0.025 and 0.20 M sulfate were measured and apparent uranium diffusion coefficients between 1.2 x 10/sup -7/ cm/sup 2//sec and 1.6 x 10/sup -7/ cm/sup 2//sec were calculated. In bench scale studies, …

The measured diffusivity of uranyl nitrate in water at 25ºC was 0.7*10^e cm^2/sec with about 40% average deviation. A program was started to develop nonnuclear uses for depleted uranium. Two continuous DRUHM reaction tuns were terminate due to erratic operation of the sodium metering system. In the second Fluorox run with crude UF, which lasted for 29 hr, a total material balance of 94.8% was obtained and 17.9& of the theoretical amount of UF was collected in cold traps and chemical traps.

Daily newspaper from Levelland, Texas that includes local, state, and national news along with advertising.

Daily newspaper from Orange, Texas that includes local, state and national news along with extensive advertising.

Daily newspaper from Orange, Texas that includes local, state and national news along with extensive advertising.

Photograph of the west side of State Highway 54. The wheat on this field was planted on the contour with ridges. The back of the photograph proclaims, "West side of S. H. 54. Wheat planted on contour with terraces. This field was subjected to an excess of 6-inch rainstorm. No soil loss nor damage to the crop."

Photograph of debris and silt on concrete corner post at Deadwomans Crossing. County black-top road in immediate foregeound covered with water. Deer Creek was bank full at time photo was made.

Photograph of a view of a pond from the spillway. Pond has detention storage to protect state and county highways and cropland from flood damage. Fence will be above permanent water level.

Photograph of a waterway constructed above a natural draw. Owner failed to seed to permanent vegetation. Upper part of field is terraced to discharge runoff into the waterway. Photo made shortly after 6-inch rain. Soil in waterway was washed away to depth of cultivation.

Photograph of debris and silt on concrete corner post at Dead Woman's Crossing. County black-top road in immediate foreground covered with water. Deer Creek was bank full at time photo was made.

Photograph of SCS Technician Dan Hamill viewing full pipe discharge from stockwater pond that has detention storage of flood water designed to protect cropland and roads below the structure.

Photograph of wheat planted on contour with terraces. This field was subjected to an excess of 6-inch rainstorm. No soil loss nor damage to the crop. Looking down a terrace channel.

Photograph of West side of SH 54. Wheat planted on contour with terraces. This field subjected to an excess of 6-inch rainstorm. No soil loss nor damage to the crop.

Photograph of this Non-terraced cropland field is across the highway east of pictures OK-1007-10 and OK-1007-12. Six inch rain caused numerous rill gullies. The field had to be reworked and reseeded.

Photograph of "SCS Technician Don Hamill viewing full pipe discharge from stockwater pond that has detention storage of flood water designed to protect cropland and roads below the structure."

Photograph of runoff water from unprotected cropland fields deposited silt and topsoil over part of the road. Excess water washed part of black top road material down the natural drain.

Photograph of the lower portion of a natural draw. Erosion severe with silt being deposited in stock water pond across road. Surface of pond water can be seen beneath trees in distance.

Photograph of silt and water from Deer Creek over county black top road at Dead Woman's Crossing. Mud bar blocks entrance to bridge.

Photograph of a silt fan formed in channel of terraces. Result of over 6-inch rain in several hours. Note crop residue on surface. Farming operations had been performed on contour. Large body of water is the erosion control dam.

Photograph of water and silt over county road at Dead Woman's Crossing. Timber and silt carried by Deer Creek over cropland field. Result of 6 inch rainstorm over watershed.

Photograph of water and silt over county road at Deadwoman Crossing. Timber and silt carried by Deer Creek over cropland field. Result of 6 inch rainstorm over watershed.