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This report is about the study of mechanism of carbon dioxide fixation by the non-sulfur purple bacterium, Rhodopseudomonas, capsulatus.

On April 1, a new energy peak of 6.1 Bev was attained with the Bevatron. Scattered particles monitored with a counter telescope in triple coincidence gave approximately 100 counts per beam pulse. April 2s the machine was down to air to allow work on beam monitoring equipment. Test operations resumed April 5. Though the total number of accelerated particles is still small, due to low energy beam losses, some cloud chamber tracks have been observed. Several plates have been exposed for Goldhaber. Stars with up to 29 prongs have been observed. The following consists of a discussion of the administration, operation and some of the experimental techniques evolved in the use of the Cosmotron.

The primary purpose of this report is to set forth the reasons why the Task II hydrogen fluoride gas delivery system is unable to supply sufficient quantities of the gas to the process at all times and to make recommendations on how to correct this problem. However, it is also a secondary purpose of this report to make general recommendations on all phases of the gas delivery system where it is felt that an improvement can be made in either the design or operation of the system.

Current H.A.P.O. planning has scheduled significant increases in low-NGS irradiated fuel production for the near future. This action, coupled with the imminent activation of the K-Reactor areas, will result in a uranium production rate which exceeds the anticipated capacities of the Purex, Redox and T Plant separations facilities. Additional separations capacity is scheduled to be provided by reactivating B Plant. However, a number of other separations processing schemes -- which will provide additional capacity -- are being evaluated for their economic and operating attractiveness as compared to combined BiPO4-TBP plant operation. The BPX process described in this memorandum is one such process. It is a modification of the TBX Scheme III of HW-32691. BPX was first proposed by the Manufacturing Department in HW-32908. The pertinent flowsheet details of the BPX process are provided and a discussion elaborates on the novel features of the flowsheet and also lists process items of general technical interest.