A preliminary feasibility study is made of seals for a machine running at 8000 rpm, having a 2-in. shaft, and operating with a pressure differential of 5 lb/in{sup2}. The following conditions must be met: during operation the air inleak shall not exceed 50 lb/2000 hr and the loss of Freon 11 shall not exceed 0.02 lb/hr; the leak-up rate during shutdown shall not exceed 1/10 in. of Hg per 24 hr (the contained volume is 100 ft{sup3}). Dry-contact and Freon 11-lubricated contact seals are considered briefly, but neither appears to be practical. The following positive-clearance seals are more feasible and are discussed in greater detail: concentric-cyinder seal, utilization of a journal bearing of the machine as a seal, and a radial-controlled-gap type of seal.

In 1950, the U.S. Geological Survey studied a uranium deposit, previously exploited, at the Silver Cliff mine near Lusk, Wyoming. The deposit consists primarily of uranophane that occurs as fracture fillings and small replacement pockets in faulted and fractured quartzite of Cambrian (?) age. The country rock in the vicinity of the mine is schist of pre-Cambrian age intruded by pegmatite dikes and unconformably overlain by flat-lying Cambrian (?) quartzite. The mine is at the southern end of the Lusk Dome, a local structure probably related to the Hartville uplift. In the immediate vicinity of the mine, this dome is cut by the Silver Cliff fault, which is a north-trneding high-angle reverse fault approximately 1,200 feet in length with a stratigraphic throw of 70 feet. The fractured quartzite has been the locus for the deposition of uranophane, metatorbernite, pitchblende, calcite, native silver, native copper, chalcocite, azurite, malachite, chrysocolla, and cuprite. The fault was probably mineralized throughout its length, but owing to erosion the mineralized zone is now discontinuous. The principal ore body is about 800 feet long. The width and depth of the mineralized zone are not accurately known but are at least 20 feet and 60 feet, respectively. The …

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This document describes aspects of heat transfer for the Hanford production reactors. Boiling, flow rate, cooling water failures, thermocouples, and shielding are considered.

This monthly progress report covers activities in the following areas: pile control; shielding studies; process tube assembly; pile operating equipment; power recovery; pile piping; and test laboratory. A detailed discussion is given for each topic.