scholarly journals Remote Monitoring of Molten Radioactive Glass

1991 ◽  
Vol 257 ◽  
Author(s):  
Alfred Schneider ◽  
Kang-Wen K. Li ◽  
Ray F. Schumacher
Keyword(s):  
Continuous Monitoring ◽  
Glass Composition ◽  
Ternary Systems ◽  
Waste Glass ◽  
Rise Velocity ◽  
Savannah River ◽  
Monitoring Method ◽  
Target Composition ◽  
On Line

ABSTRACTAn on-line method is described for the near-continuous monitoring of the composition of a molten radioactive waste glass or, alternatively, for signaling a deviation from the target composition of a waste glass. The principle of this method, proposed by A. Schneider in 1986, is founded on the relation between two specific physical properties and composition in a ternary system. Most glasses currently considered as waste forms can be represented as pseudo-ternary systems. The pair of properties especially well suited for this purpose are the viscosity and density of the molten glass. A novel viscometry method was developed which uses the remotely determined rise velocity of carefully metered gas bubbles. The monitoring method was tested successfully with simulated Savannah River waste glasses. An integrated probe was conceived for a Joule-heated melter for the on-line determination of viscosity, temperature, density, and liquid level. A computer program calculates the glass composition from the measured data, using information from a previously developed data base.

scholarly journals Unsegmented flow approach for on-line monitoring of pH, conductivity, dissolved oxygen and determination of nitrite and ammonia in aquaculture

1994 ◽  
Vol 16 (2) ◽  
pp. 59-62 ◽  
Author(s):  
A. C. Ariza ◽  
P. Linares ◽  
M. D. Luque de Castro ◽  
M. Valcárcel
Keyword(s):  
Dissolved Oxygen ◽  
Continuous Monitoring ◽  
Sea Water ◽  
Flow System ◽  
Photometric Determination ◽  
Fish Feed ◽  
Fish Breeding ◽  
On Line ◽  
High Concentrations

A fully automated flow system for on-line monitoring of analytes/parameters of interest in aquaculture is described. The approach has been optimized for the photometric determination of nitrite and ammonia and the continuous monitoring of pH, conductivity and dissolved oxygen, but these analytes/parameters are readily changeable as required. The system has been tested by monitoring these species in the input and output sea water streams of tanks at a fish breeding farm and also by monitoring water containing high concentrations of fish feed.

Corrosion of inconel-690 electrodes in waste glass melts

1999 ◽  
Vol 556 ◽  
Author(s):  
H. Gan ◽  
A. C. Buechele ◽  
C.-W. Kim ◽  
X. Huang ◽  
R. K. Mohr ◽  
...  
Keyword(s):  
Nuclear Waste ◽  
Glass Composition ◽  
Waste Glass ◽  
Savannah River ◽  
Glass Melts ◽  
Waste Vitrification ◽  
Inconel 690 ◽  
Ac Current ◽  
High Level Nuclear Waste ◽  
High Level

AbstractInconel-690, a Cr-Ni-Fe-based “superalloy,” has become the material of choice for electrodes in joule-heated waste glass melters and is currently employed in the high-level nuclear waste vitrification systems at West Valley and DWPF, as well as in GTS Duratek's privatized M-Area mixed waste vitrification facility at Savannah River. Future applications of joule-heated vitrification technologies will necessitate an assessment of the limits of performance of this material under more demanding conditions than have been studied previously. In this work, Inconel 690 electrodes were tested in several simulated sodium-rich aluminosilicate waste glasses in wide ranges of AC current density, electrical waveform, temperature, and glass composition.

An optimized continuous-monitoring procedure for semiautomated determination of serum acid phosphatase activity.

1976 ◽  
Vol 22 (12) ◽  
pp. 2025-2028 ◽  
Author(s):  
R Bais ◽  
J B Edwards
Keyword(s):  
Acid Phosphatase ◽  
Phosphatase Activity ◽  
Acid Phosphatase Activity ◽  
Continuous Monitoring ◽  
Prostatic Acid Phosphatase ◽  
Monitoring Method ◽  
Modified Method ◽  
Nitrophenyl Phosphate ◽  
Monitoring Procedure

Abstract A continuous-monitoring method for measuring acid phosphatase activity with alpha-naphthyl phosphate as the substrate was critically evaluated and modified. Using partially purified prostatic acid phosphatase, we show that certain conditions for the assay must be satisfied to ensure linearity. These conditions include maintaining the pH between 5.6 and 5.9 and the addition of detergent to sustain linearity. The results obtained with alpha-naphthyl phosphate have been compared with those obtained by using p-nitrophenyl phosphate as substrate. When used with an automatic rate analyzer, the modified method is as sensitive but more reproducible.

Fast calibration of CBED patterns for quantitative analysis

1993 ◽  
Vol 51 ◽  
pp. 674-675
Author(s):  
M.A. Gribelyuk ◽  
M. Rühle
Keyword(s):  
Reciprocal Lattice ◽  
Accurate Determination ◽  
Incident Beam ◽  
Crystal Thickness ◽  
Structure Model ◽  
Beam Direction ◽  
Transmitted Beam ◽  
Reciprocal Vector ◽  
On Line

A new method is suggested for the accurate determination of the incident beam direction K, crystal thickness t and the coordinates of the basic reciprocal lattice vectors V1 and V2 (Fig. 1) of the ZOLZ plans in pixels of the digitized 2-D CBED pattern. For a given structure model and some estimated values Vest and Kest of some point O in the CBED pattern a set of line scans AkBk is chosen so that all the scans are located within CBED disks.The points on line scans AkBk are conjugate to those on A0B0 since they are shifted by the reciprocal vector gk with respect to each other. As many conjugate scans are considered as CBED disks fall into the energy filtered region of the experimental pattern. Electron intensities of the transmitted beam I0 and diffracted beams Igk for all points on conjugate scans are found as a function of crystal thickness t on the basis of the full dynamical calculation.

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