[en] The plan for the long-term management of Savannah River Plant high-level waste, now stored as alkaline salt and sludge in large underground tanks, is to convert this waste to a high integrity solid for shipment to a Federal repository. The reference process consists of the following steps: hydraulic removal of waste from tank, separation of sludge and dissolved salt, decontamination of dissolved salt by ion exchange, incorporation of sludge and ion exchange eluate into borosilicate glass, evaporation of decontaminated salt solution, shipment of doubly encapsulated glass canisters, and storage of decontaminated salt cake. 12 figures, 5 tables

[en] Federal regulatory criteria for geologic disposal of high-level waste are under development. Also, interim performance specifications for high-level waste forms in geologic isolation are being developed within the Federal program responsible for repository selection and operation. Two high-level waste forms, borosilicate glass and crystalline ceramic, have been selected as candidate immobilization forms for the Defense Waste Processing Facility (DWPF) which is to immobilize high-level wastes at the Savannah River Plant (SRP). An assessment of how these two waste forms conform with the proposed regulatory criteria and repository specifications was performed. Both forms were determined to be in conformance with postulated rules for radionuclide releases and radiation exposures throughout the entire waste disposal system, as well as with proposed repository operation requirements

[en] High-resolution real-time ultrasound (US) and computed tomography (CT) were compared in 48 patients with a clinical diagnosis of thyroid abnormality and also correlated with biopsy or surgery. The modalities were considered comparable in 38 cases (79%), while CT was superior in 5 and US in 5. Both techniques lacked histopathological specificity. CT appears to be advantageous in detecting substernal thyroid extension and confirming thyroiditis, while the ability of US to detect small nodules makes it the procedure of choice in evaluating suspected intrinsic thyroid abnormalities