We describe tests of EiChrom Industries' Ni-selective ion exchange resin for use in analysis of63Ni in Savannah River Site high level waste. We report measurement of63Ni content in two sets of Savannah River Site glass product from the Defense Waste Processing Facility. The63Ni β-decay activity was chemically separated in quintuplicate from fission product and plutonium α-β activities of up to 103 times the observed63Ni content. The separation used a Ni-dimethlyglyoxime precipitation followed by radiochemical purification using the Ni-selective
extraction chromatography resin. Further removal of interfering activity was based on diagnosis of observed radioactivity
in each successive product phase. We analyzed eleven plant glass product samples using seven spiked standard addition duplicates
to measure63Ni recovery in the separations. Selected liquid scintillation β-decay spectra are shown to validate the method. Interpretation
of accuracy is based upon three distinct comparisions to predicted63Ni content.
The paper analyses the prescriptive Biblical performative verbs zapovedovati(zapovedujem), ukazováti(ukazujem), narocati(narocam) and constructions such as to jemoja zapoved, novo zapoved vam dam, izdajam povelje. The verb zapovedovati is never used performatively in the commandments of the Old Testament. The first person singular form only reports a given situation. In their performative use the prescriptive verbs signal a new situation.
In dealing with biblical subjects (especially in dramatic production between 1910 and 1930) Croatian literary expressionism showed its potent artistic side. This paper attempts to identify active literary mechanisms used by Croatian expressionist writers in their works in order to mark the syntactic and semantic potential of the biblical text. The analysis of intertextual connections between the biblical original and new literary structures results in establishing the dichotomy between affirmation/reconstruction (M. Begović, A. Cesarec, J. Kosor, T. Prpić, F. Galović, S. Tucić, M. Ogrizović) and negation/disputing of biblical contents, motifs and symbols (T. Strozzi, M. Krleža, J. Kulundžić, K. Mesarić). A frequent choice of Christ’s character and events in connection with him for literary interpretation and the construction of structure and semantics of a new text gives evidence of functional overlapping and joining of a Christian myth on Jesus as a Savior of humankind and expressionistic myth on a New Man as a symbolic projection of spiritual renewal.
Authors:D. DiPrete, C. DiPrete, N. Bibler, C. Bannochie, and M. Hay
Waste cleanup efforts underway at the United States Department of Energy’s (DOE) Savannah River Site (SRS) in South Carolina,
as well as other DOE nuclear sites, have created a need to characterize 79Se in radioactive waste inventories. Successful analysis of 79Se in high activity waste matrices is challenging for a variety of reasons. As a result of these unique challenges, the successful
quantification of 79Se in the types of matrices present at SRS requires an extremely efficient and selective separation of 79Se from high levels of interfering radionuclides. A robust 79Se radiochemical separation method has been developed at the Savannah River National Laboratory (SRNL) which is routinely
capable of successfully purifying 79Se from a wide range of interfering radioactive species. In addition to dramatic improvements in the Kd, ease, and reproducibility of the analysis, the laboratory time has been reduced from several days to only 6 h.
Authors:N. Bibler, W. Kinard, W. Boyce, and C. Coleman
Savannah River Site (SRS) is immobilizing the radioactive, high-level waste sludge in Tank 51 into a borosilicate glass for
disposal in a geologic repository. A requirement for repository aceeptance is that SRS report the concentrations of certain
fission product and actinide radionuclides in the glass. This paper presents measurements of many of these concentrations
in both Tank 51 sludge and the final glass. The radionuclides were measured by inductively coupled plasma mass spectrometry
and α, β, and γ counting methods. Examples of the radionuclides are90Sr,137Cs,238U and,239Pu. Concentrations in the glass are 3.1 times lower due to dilution of the sludge with a nonradio-active glass forming frit
in the vitrification process. Results also indicated that in both the sludge and glass the relative concentrations of the
long lived fission products insoluble in caustic are in proportion to their yields from the fission of235U waste in the SRS reactors. This allowed the calculation of a fission yield scaling factor. This factor in addition to the
sludge dilution factor can be used to estimate concentrations of waste acceptance radionuclides that cannot be measured in
the glass. Examples of these radionuclides are79Se,93Zr, and107Pd.
Authors:D. Beals, W. Britt, J. Bibler, and D. Brooks
The use of solid phase extraction (SPE) disks was studied for the quantification of selected radionuclides in aqueous solutions.
The extraction of four radionuclides using six types (two commerical, four test materials) of 3M EmporeTM RAD disks was studied. The radionuclides studied were: technetium-99 (two types of disks), cesium-137 (two types), strontium-90
(one type), plutonium-238 (one type). Extractions were tested from DI water, river water and seawater. Extraction efficiency,
kinetics (flow rate past the disk), capacity, and potential interferences were studied as well as quantification methods.