The first step in a proposed processing method for recovery of uranium from graphite-uranium fuels consists of oxidation of the fuel by oxygen to volatilize the carbon. Residue ash from the combustion step can be treated in a variety of ways to recover and purify the uranium. The combustion step may be caried out by contacting the solid fuel in a fixed or moving bed with a stream of oxygen-bearing gas in a tubular or annular reactor. Oxidizing gas may be introduced to the reactor at several points up the reactor and there may be continuous or intermittent addition of fresh fuel and removal of residue ash.

Report documenting the progress of the Army Gas-Cooled Reactor Systems Program to develop a mobile nuclear power plant for military field operation.

Boron-10 has a high thermal neutron capture cross section (3880 barns). Following neutron capture, the subsequent nuclear disintegration produces an alpha particle and a lithium-7 nucleus with the release of an average of 2.34 MeV for the particle irradiation, and in 93% of the reactions there is also the emission of an 0.48 MeV gamma ray: [equation not transcribed]. The kinetic energy is divided between the lithium-7 nucleus and the alpha particle giving the equal and opposite momentums with a range in tissue of about 8-14μ or approximately 1 cell diameter (1). This fact and the reported favorable partition of boron between tumor and the normal brain suggested a possible therapeutic usefulness which has been investigated clinically. The object of our study is to document the biological effects of the B10 (n,α) Li7 reaction on the brain of dogs injected with boron-10 30 minutes prior to irradiation with thermal neutrons. For this, we felt it desirable to estimate a dose for the boron-10 reaction which if exceeded, produces destruction of normal tissue. This dose could then be a reference dose to be utilized as a maximal limit for the irradiation of normal tissue. We have assured that the largest fluence …

This describes about Cold Compacting of Uo$Sub 2$ + Zrh$Sub 2$ Fuel Pellets for Critical Experiments.

This test was conducted to determine the adequancy of the Core Band to withstand the forces imposed upon it during Reactor Operation.

The biological evaluation of the thermal neutron capture reaction of boron-10, B10 (n,α)Li7 + 2.786 MeV, has previously been studied, using different particles from the boron-10 thermal neutron capture reaction compared with 250 kvp x-rays has been reported as 1.05 for spleen-thymic weight reduction (1), as 1.5 to 2.0 for skin lesions in pigs (2), and 1.87 for skin lesions of the rabbit's ear (3). The significance of such a calculation is felt to be unreliable for the boron-10 reaction in animals because of the vagaries of dose determination resulting from irregular boron distribution, and by the presence of an adventitious irradiation from fast neutrons and capture gammas that is inadequately determined at present. Our present experiment attempts to circumvent the difficulties attendent to studies of the boron-10 reaction in animals by comparing the effect of this reaction on the proliferative capacity of HeLa cells with those produced with 250 kvp x-ray.

Efforts have been made to experimentally evaluate and to calculate the effect of reactor environment on splines. This report follows some of these efforts and relates them to operational experience. The use of splines in the Hanford Reactors has improved the efficiency and ease of operating the reactors. With the widespread use of splines, it is important to know the effect of reactor exposure to safely and efficiently use the splines in reactor operation.

This report provides an addendum to the February 1963 production studies and details Neptunium 237 production yields.

The first man-made nuclear reactor -- or "pile" as it was then called -- was rather hurriedly improvised and operated in a crowded space under the athletic bleachers of Stagg Field at the University of Chicago on December 2, 1942. Just prior to this time, there began the assembly of a group of physicists with an unusual assignment. They were determined that radiation hazards of unprecedented proportions must be coped with successfully in the conduct of reactor programs as planned. Since these physicists were to be concerned with the health of radiation workers, they were called health physicists. There was no formal instruction available to this first group of health physicists and they perforce received training as they felt their way by firsthand experience and by trial and error. Health physics at Oak Ridge National Laboratory from the very beginning has been organized into three principal areas: applied activities, education and training and research.

The N-Reactor Hazard Summary Report examines the hazard from operating the N-Reactor with a uniform fuel loading enriched to 0.947% U{sup 235}. Incentives have been developed for reactor testing of a block of 49 tubes loaded with co-producer elements, i.e. elements capable of producing both weapons grade plutonium and tritium. The element utilizes an outer fuel tube enriched to 1.25% U{sup 235} with an inner target lithium-aluminum rod. Criteria have been developed to guide the evaluation of safety aspects of such tests. It is the purpose of this document to review the hazards associated with the proposed test and to set forth special precautions which will be necessary to maintain a high level of safety.

This report details activities of the Irradiation Processing Department during the month of February 1964.

This report details activities of the Irradiation Processing Department during the month of March 1964.

This document details activities of the Irradiation Processing Department during the month of October 1964.

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This report details progress in an intensive investigation which was launched to determine the basic mechanisms leading to gross loss of UO{sub 2} fuel upon thermal cycling of UO{sub 2}-W cermets and to suggest means of overcoming this serious operational problem. (This problem was recently uncovered at both Lewis Research Center and at Hanford). More than 40 separate experiments were conducted in four high temperature furnaces, at temperatures to 2600 C, pressures from 10{sup {minus}5} mm vacuum to 1000 psi, atmospheres including wet, pure and tank H{sub 2}-Ar mixtures, N{sub 2}, and He, and cycle periods from 30 seconds to 15 hours. Specimens examined included two types of NASA-fabricated plates, three types of Hanford high energy impacted discs, and several other materials used for single experiment evaluation.

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Criminal intelligence report regarding George Bouhe, a native born Russian who was acquainted with Lee Harvey and Marina Oswald. Bouhe stated that Oswald appeared withdrawn.

Criminal intelligence report regarding an interview with Frank H. Ray, an acquaintance of Lee Harvey and Marina Oswald. Ray stated that he had met Lee Harvey and Marina at a party which was given by Declan Ford. Marina stayed with Ray and his wife for a few days due to domestic problems. Oswald was able to affect a reconciliation with his wife some time afterward.

Second page of a criminal intelligence report regarding an interview with Frank H. Ray, an acquaintance of Lee Harvey and Marina Oswald. Ray stated that he had met Lee Harvey and Marina at a party which was given by Declan Ford. Marina stayed with Ray and his wife for a few days due to domestic problems. Oswald was able to affect a reconciliation with his wife some time afterward.

Criminal intelligence report regarding George Bouhe, a native born Russian who was acquainted with Lee Harvey and Marina Oswald. Bouhe stated that Oswald appeared withdrawn.

First page of a criminal intelligence report regarding an interview with Frank H. Ray, an acquaintance of Lee Harvey and Marina Oswald. Ray stated that he had met Lee Harvey and Marina at a party which was given by Declan Ford. Marina stayed with Ray and his wife for a few days due to domestic problems. Oswald was able to affect a reconciliation with his wife some time afterward.

First page of a criminal intelligence report regarding an interview with Frank H. Ray, an acquaintance of Lee Harvey and Marina Oswald. Ray stated that he had met Lee Harvey and Marina at a party which was given by Declan Ford. Marina stayed with Ray and his wife for a few days due to domestic problems. Oswald was able to affect a reconciliation with his wife some time afterward.