The Battelle Research Reactor is a modified pool reactor located in a sparsely settled 500-acre tract owned by Battelle 13 miles west of Columbus, Ohio. The reactor has been operating since October 29, 1956, at power levels up to 1 megawatt. More than 300 megawattdays have been logged on the reactor with most of this operation at a power level of 1 megawatt. No serious incidents have occurred during the operation of the reactor. With only a few modifications the reactor will operate continuously at a power level of 2 megawatts. First, interlock will be added to the safety instrumentation to scram the reactor in the event of significant reduction in the flow rate of the primary coolant. Second, to provide additional margin of safety against the possibility of local boiling occurring in the core, the primary flow rate will be increased to greater than 1500 gpm. Third, a 700-gallon holdup tank will be added to the primary coolant system to allow for decay of the nitrogen16 formed in the coolant as it passes through the core. Holdup will reduce the dose rate at the surface of the pool to 4 mr per hr or less during routine 2-megawatt operation. …

This is the monthly report for the Hanford Laboratories Operation, July, 1958. Reactor fuels, chemistry, dosimetry, separation processes, reactor technology, financial activities, biology operation, physics and instrumentation research, employee relations, operations research and synthesis operation, programming, radiation protection, and laboratory auxiliaries operation area discussed.

The Objectives of this test are to: (1) Investigate variables which may be responsible for the severe pitting of X-8001 Alloy jackets, and (2) Extend the testing of reduced pH coolant.

A request was made for preliminary data on those engineering and study items to be included in the scope of work covered by Project CG-79L, Confinement of Radioactive Particulate Matter in 105 Building Exhaust Air''. Time has not been available, of course, to accomplish any significant amount of additional engineering work. However, an effort was made to assemble all the information which is currently at hand regarding these items. The results are presented.