It is of interest to investigate the time following a complete loss of coolant incident when the pile would be exposed to the ambient air. This is of concern due to the fast propagation of graphite burn-up when brought in contact with air at or above the operating temperature of the graphite (1292{degree}F). One possible way conjectured in which the pile can be exposed to the surrounding environment is for the centering flange gasket (neoprene) or the bellows gas seal (silicone) to fail. This particular study was concerned with the temperature transient of the seals following the extreme accident condition of complete loss of coolant. This problem is one of many being investigated in a concentrated effort to re-evaluate the effectiveness of the confinement system of the smaller reactors. The maximum credible accident for the DUN operated production reactors has been the loss of coolant to a single cross header. The Hanford philosophy of reactor safety has been the provision of reliable methods of cooling fuel in all accident situations short of severance of the primary coolant piping or destruction of the reactor building. However, for the present study the more serious accident of complete loss of coolant was investigated. …

This memorandum describes the goals for the fourth quarter of fiscal year 1967, for the Plowshare Program. The goals are set out as minimum goals to be achieved by different divisions in the laboratory which are involved in this program. Some of the direction depends upon whether a preliminary test explosion is fired.

The objective of the meeting was to provide a companion meeting to the ''First Symposium on Accelerator Radiation Dosimetry and Experience'' which was held November 3-5, 1965, at the Brookhaven National Laboratory. This first symposium was limited in scope to an intensified discussion of dosimetry techniques. The biology which is associated with high energy radiation was specifically excluded, since it was the original plan to hold a second symposium devoted entirely to biology. Thus the present Symposium was a sequel to the first and they were inseparable in their objectives. Since those attending the BNL Symposium were almost entirely health physicists with a background in physical science and actively engaged in the solution of radiation protection problems at high energy accelerators, it was felt that it would be necessary to begin the BID Symposium with a general review session on radiation biology, in order to provide a biological background for the proper understanding of the later sessions. This first session was arranged to give the health physicist a meaningful transition from fundamental radiobiological considerations to current new research activities in high energy biology. In our opinion, and also based on the comments of several of those attending these objectives were …

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This report presents the details of the status of special reactor process tube loading during the month of January 1967.