Answers by ICPP personnel to questions asked by Eurochemic are given on a variety of subjects, including off-gas sampling systems, off-gas filtration, iodine evolution during fuel dissolution, and process cell contamination. Data are presented on the% of I/sup 131/ retained in waste solutions in the absence and presence of mercury. (D.L.C.)

An experimental investigation into the gas dynamics of a jet-driven vortex tube for application of a cavity nuclear reactor to rocket propulsion has shown that viscous retardation of the vortex motion is severe, because of a high level of turbulence near the periphery. Based on the experience gained in this study, it is estimated that the achievement of vortex strengths sufficient for practical application will require the use of small diameter tubes with appreciable expenditure of power for recirculation of the gas. The effect of the high degree of turbulence on the separation process near the periphery remains to be determined. The independent variables which were found to influence the vortex strength significantly for a given gas and temperature condition are the tube diameter, the mass flow rate per unit tube length, the injection velocity, and the wall pressure. Estimates of the degree of turbulence in vortex flow have been made from data on the variation in tangential velocity with radius. Virtual (total) viscosities near the periphery ranged from 30 to 700 times the molecular viscosity for tangential Reynolds numbers of from 4 x 10/sup 4/ to 2 x l0/sup 6/. Measurements of the position of the mole- fraction peak …

This monthly document details activities of the Hanford Operations Office during the month of May 1960. (FI)

This memorandum discusses coupling of the reactor exhaust system to the filter building, under Project CG-791, which will require diversion of the 105 Building exhaust air to two temporary stacks. The temporary stacks will be installed over each of two exhaust fans. The use of these temporary (short) stacks during the tie-in period (estimated at 8 to 16 days) could greatly aggravate radiological problems because of reduced dilution and of the reactor building exhaust air. Special operating requirements are given.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Will Wilson, regarding a legal question submitted for clarification: Questions concerning the permit provisions of the Special Fuels Tax Law, Art. 10.11(1) Chapter 10, H.B. 11, 3rd C.S. 56th Leg., as it pertains to "User Permits"