[en] Shop test of the sludge mobilization cart system to be used in the AZ-101 Mixer Pump Demonstration Test Tests hardware and software. This procedure involves testing the Instrumentation involved with the Gamma Cart System, local and remote, including depth indicators, speed controls, interface to data acquisition software and the raising and lowering functions. This Procedure will be performed twice, once for each Gamma Cart System. This procedure does not test the accuracy of the data acquisition software

[en] A capillary rheometer has first and second fluid reservoirs interconnected by a capillary tube to form a balance module which is mounted in a glove box when radioactive fluid or slurry is investigated. The first reservoir is balanced on a knife edge and the second reservoir is suspended from a weighing means, such as a load cell. Fluid is forced under controlled measured pressure from the first to the second reservoir and the flow rate is determined by measuring the loads on load cell 8 at discrete time intervals. In an alternative embodiment, the capillary tube may have a permeable wall, and permeate flow through the wall of the capillary may be measured by the load cell. In another embodiment a filter in reservoir collects the solid contents of a slurry, the liquid contents of the slurry being forced by applied pressure to the second reservoir. (author)

[en] Shop Test of the Gamma Cart System to be used in the AZ-101 Mixer Pump Demonstration Test. Tests hardware and software. This procedure involves testing the Instrumentation involved with the Gamma Cart System, local and remote, including: depth indicators, speed controls, interface to data acquisition software and the raising and lowering functions. This Procedure will be performed twice, once for each Gamma Cart System. This procedure does not test the accuracy of the data acquisition software

[en] This Software Configuration Management Plan (SCMP) provides the instructions for change control of the AZ1101 Mixer Pump Demonstration Data Acquisition System (DAS) and the Sludge Mobilization Cart (Gamma Cart) Data Acquisition and Control System (DACS)

[en] By bonding ions to the surface of matter to give it a charge, and forming a froth with the aid of a frothing agent having groups of opposite charge to the ions, so that it bonds to the matter, the matter is carried in the froth to the surface of the liquid. The oxidation state of the surface of the matter may be changed, before bonding takes place with the ions, to one which facilitates that bonding. For example, uranium dioxide particles are oxidised with hydrogen peroxide, sodium carbonate added to produce a negatively charged uranyl carbonate complex and a froth formed with the aid of cetyl trimethylammonium bromide. Cationic groups in the latter bond to the uranyl carbonate complex, causing the uranyl carbonate complex to be concentrated in the froth at the surface of the liquid. The froth is then skimmed off to remove the uranium dioxide particles. This invention is particularly applicable to separation of actinides from Magnox sludge resulting from nuclear fuel reprocessing. (author)

[en] Liquid effluents containing hazardous constituents particularly radioactive contamination are treated to form precipitates in the effluent which are capable of capturing the hazardous constituents. The effluent containing the precipitates is then treated with flocculating agent to increase the particle size of the precipitates by aggregation and the flocculated precipitates are separated from the liquid in a hydrocyclone. (author)

[en] Ion exchange is performed by contacting a solution containing ions to be absorbed with a hydrous oxide of uranium in a suitable form. The hydrous oxide may be uranium dioxide or uranium hydroxide, and may be prepared by reducing a uranium species, precipitating the reduced species, and drying the precipitate to give the required hydrous oxide. (author)

[en] An actinide such as plutonium is dissolved at a pH of 5.5 or greater by treating the actinide with a conditioning agent and a complexing agent in an aqueous medium. For example the conditioning agent may comprise hydrogen peroxide and the complexing agent may comprise citrate ions. The pH of the aqueous medium is controlled using carbon dioxide or a carbonate such as sodium carbonate to above 5.5. The method is particularly useful in the dissolution of Magnox-sheathed fuel elements (author)

[en] Persistence of DNA-adducts has been observed in a variety of experimental circumstances and has been suggested as one potential mechanism for explaining the long-term delay before expression of proliferative disease. In this concept, a stable DNA-adduct, which is a remnant of a prior exposure in a nondividing cell, would not express the genotoxic effect until the cells were stimulated to divide, and thus explain the long-term delay in expression of cancer. An alternative view of the observation of persistent DNA-adducts, described in this communication, is the continuing replenishment of DNA adducts by formation and turnover of these adducts from exposure to a constant supply of the ultimate carcinogenic species derived from a prior exposure. It is of interest to note that virtually all experiments where ''persistent'' adducts have been observed have been high dose exposures. During the course of experiments designed to develop improved methods for detection of DNA adducts and related derivatives derived from polynuclear aromatic hydrocarbons (PAH), we observed that there was a continuous excretion of urinary derivatives of the injected benzo(a)pyrene (BaP) beyond the initial burst of detoxification. This report describes the time dependent distribution of those derivatives in blood, urine, feces, and at the site of injection. 11 refs., 5 figs., 4 tabs

[en] Among the requirements set forth by the interim final rule, 29 CFR Part 1910.120, promulgated by the Occupational Safety and Health Administration (OSHA) in response to the Superfund Amendments and Reauthorization Act of 1986 (SARA), are specific provisions for health and safety training of employees involved in hazardous waste operations. These training provisions require a minimum of 40 hours of initial instruction off the site for employees involved in corrective operations and cleanup activities at hazardous waste sites. A less detailed training requirement of 24 hours is specified for employees working in more routine treatment, storage, and disposal activities. Managers and supervisors who are directly responsible for or who supervise employees engaged in hazardous waste operations must complete 8 additional hours of training related to management of hazardous waste site activities. Consistent with the intent of 29 CFR 1910.120, a training program has been developed at Oak Ridge National Laboratory (ORNL) to comply with the need to protect the safety and health of hazardous waste workers. All hourly requirements specified in the interim final rule are met by a comprehensive program structure involving three stages of training. This paper will outline and discuss the content of each of these stages of the program. The involvement of various ORNL organizations in facilitating the training will be highlighted. Implementation strategies will be discussed as well as progress made to date