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Abstract  

The Savannah River Site (SRS) Burial Ground had a container labeled as Box 33 for which they had no reliable solid waste stream designation. The container consisted of an outer box of dimensions 48″ × 46″×66″ and an inner box that contained high density and high radiation dose material. From the outer box Radiation Control measured an extremity dose rate of 22 mrem/h. With the lid removed from the outer box, the maximum dose rate measured from the inner box was 100 mrem/h extremity and 80 mrem/h whole body. From the outer box the material was sufficiently high in density that the Solid Waste Management operators were unable to obtain a Co-60 radiograph of the contents. Solid Waste Management requested that the Analytical Development Section of Savannah River National Laboratory perform a γ-ray assay of the item to evaluate the radioactive content and possibly to designate a solid waste stream. This paper contains the results of three models used to analyze the measured γ-ray data acquired in an unusual configuration.

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Abstract  

The use of thermogravimetric analysis–mass spectrometry (TGMS) to study the state of preservation of archaeological bones has been investigated. As part of a collaborative multi-analytical study, bones exhumed from graves of the late Roman period in France and Italy were examined. A decrease in organic matter for the archaeological bones compared to that for new bone was confirmed, demonstrating that diagenesis of aged bones can be detected using TGMS. Different amounts of collagen were determined for bones from different graves and could, for the majority of specimens, be correlated with the visually observed preservation states.

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Abstract  

This pape discusses the use, of stable Cs as an activatable tracer for measuring performance of plant root intrusion barriers for solid waste disposal site cover systems. Experiments conducted at small-scale demonstrate the effectiveness and practicality of the technique and suggest that the methodology has application to a better understanding of plant root ecology.

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Wetwang site. This is one of the few chariot burial sites found in the UK. The object was displayed in a showcase with RH values ranging between 35 and 52% and within 6 weeks deterioration was observed with the formation of akaganéite crystals. A similar

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materials occurred during the burial into the marine environment. In fact, inorganic substrates replace organic matter; phosphate and silicates have been detected into petrified wood and calcium minerals in wood buried in terrestrial region. In our case

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Abstract  

Low-density polyethylene (LDPE) blended with poly(3-hydroxybutyrate) (PHB) and additivated with pro-oxidant were soil buried for 180 days and characterized using thermogravimetry (TG) and differential scanning calorimetry (DSC). TG data showed that both onset and maximum rate degradation temperatures decreased as a function of biodegradation time. Apparent activation energies (E a) using the Broido integral method decreased with the burial time increasing. PE crystallinity degree values increased in general up to 2 months of biodegradation. At the end of the soil burial (SB) test these values decreased principally for samples that were previously thermo-oxidized in an oven.

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. A. & Khokhlova , O. S. , 2003 . Biomorphic indicators of humaninduced transformation of soils under early nomad burial mounds in southern Russia . Revistas Mexicana de Ciencias Geológics. 20 . ( 3 ) 283 – 288

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Summary  

This report presents the results of the determination of radionuclide component of the scales on the inner surfaces of oil well pipes and pump-compressors for certain oilfields in Kazakhstan. Results of 96 investigations show that the main contamination of pipe surface scales with radionuclides was related to the accumulation of 226Ra, 228Ra and their daughter decay products. Study of the scales removed by means of a special solution of “COX ASIA-CLEAN' revealed that practically all radionuclides were removed from the inner surface of the pipes. Scales, after segregation from the solution, contained the radionuclides in strongly bound conditions. Loss of radon isotopes comprised at most 3& to 5& of the radioactivity within the scales. These results suggest that an economically effective method for burial of radioactive scales is possible. Methods of cleaning and burial were tested at one of the oilfields in Kazakhstan.

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Abstract  

Determination of retardation factors and coefficients of distribution using a simplified mathematical model for analyzing the migration of leachate and radioactive material contained in radioactive waste burial concrete trench systems has been developed. Results show that concrete for engineered trench systems secures radionuclide preservation in solidified medium for longer than 300 years. These results will be used for constructing future radioactive waste storing centers in Yugoslavia.

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Abstract  

The 18 km long banks of the Bohunice NPP waste water recipient are contaminated by137Cs as a result of two accidents on the CO2 cooled NPP-A1 unit in 1976 and 1977. Contamination acceptance limits 6 or 8 Bq137Cs/g of soil, depending on contaminated area size, were derived on the basis of developed principles, and approved by the authorities. Removing and safe burial of 1100 m3 of contaminated soil from steep area and 15 cm thick clean soil covering on about 1 ha of flat area of the contaminated banks is planned in frame of the re-considered restoration project implementation in 1995/96.

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