Included are summaries of studies of: DCX-1 operation and performance; DCX-2 design and engineering; plasma physics; vacuunn arcs; ion production; acceleration and injection; plasma theory and computations; instrumentation; magnetics; cross-section measurements; vacuum systems and techniques; bell- lightning; and design and engineering. Separate abstracts were prepared for the 11 sections. (B.O.G.)

Tests were performed on the Shippingport PWR to determine the magnitude and location of coolant system leakages. The total leakage from pressurizer relief and reactor relief valves was 62.1 gal/hr. The total plant leakage was 19.3 gal/hr. (T.F.H.)

Design studies were made for the cooling, shielding, and electrical- control support systems required for the testing of the isotope-fueled 125-w generator in a hot-cell facility. A ceric oxide fuel containing 10 wt.% SiC exhibited suitable burn-up characteristics in simulated postorbital re-entry heating conditions. Inconel X was selected as the fuelcontainment material. Negative pitch angle injections were evaluated for the injection-stage flight vehicle. The second electrically heated 125-w generator was assembled and prepared for checkout. A successful reproducible process for bonding the p element was developed in which GeTe was furnace melted into an iron shoe and a spring-loaded element was bonded to the shoe in an induction furnace. The p element contact resistance was 0.1 milliohm. The maximum output on the first generator was measured as 78.2 w. Measurements were stopped when power output deteriorated to 28.8 w. An inspection showed that oxidation due to insufficient reducing atmosphere at the hot junction contacts was the cause. Parametric thermoelectric generator performance tests were conducted in which the internal gas pressure was varied from 0 to 1.5 atm. and the external pressure was either 1 atm. or a vacuum. The fabrication, operation, and penformance of cesium diodes were studied. The effect …

Calibration testing was conducted to determine the direction and magnitude of drift in core thermocouples, primary loop and pressunizer resistance thermometers. and the resistance thermometers in the secondary side of the boilers. Because of operational conditions, only those sensing elements in coolant loops A and C could be evaluated. An analysis of data from A and C loops is included. (J.R.D.)

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BS>Twelve papers are included which were presented at the Symposium on Physics and Nondestructive Testing. The subject matter of the papers include neutron radiography, elastic waves, ultrasonic waves, magnetic properties, applied mathematics, and accelerator applications. Separate abstracts have been prepared for eleven papers, while the remaining paper was previously abstracted in NSA. (D.L.C.)

The relief valves that were tested included four each in the reactor coolant loop and in the purification system. Test results are tabulated which indicated that all valves operated at or witai the prescribed limits of 2530 plus or minus 50 psig in the "as left" condition. Most of the valves had to be popped and adjusted several times befors the valves would pop at a pressure within the prescribed limitations. Some of the difficulties encountered during the testing are discussed. (B.O.G.)

Experimental work on the preparation and measurement of BaThO/sub 3/ shows that the compound exists and is the most stable compound in the Ba-Th-O system. It is cubic at ordinary temperature, with the perovskite structure, and has a crystal density of 4.59 g/cc. The compound may be prepared from a coprecipitated mixture of the barium and thorium oxalates at 750 deg C, and the reaction is driven to completion below 1000 deg C in the presence of an excess of barium. BaThO/sub 3/ appears to hydrolyze readily in the presence of moisture and/or CO/sub 2/. It does not, therefore, appear to have the chemical stability required in a protective coating, and it is inadvisable to measure other coating parameters at this time. It may, however, serve as a superior thermionic emitter. (auth)

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Experimental results are summarized for investigations on the condenser fluid mechanics of mercury under zerogravity, two-phase conditions. Conditions required for interfacial stability in tubes were determined as a function of tube diameters. Correlated two-phase pressure drop data are presented as functions of tube inlet Reynolds number and vapor specific volume. Flow regime stability was studied under zero-gravity and 2.55-gravity conditions and at various Reynolds numbers. the effect of noncondensable gas on flow performance in mercury forced convection condensers was evaluated. (D.L.C.)

A summary is given of the development of equipment to obtain data for the corrosion and solubility properties of rubidium, and for the corrosion and thermodynamic properties of cesium. (B.O.G.)

The study which has been carried out under Contract AT(30-1)2477 has as its objective the review of all work which has been done on the application of radionuclear techniques to research in water resources and supply, the evaluation of this work, and the suggestions of specific experiments which must be performed if these applications are to be extended.

Description of 15 specific systems employing search-type selection principles.

Report describing ongoing progress made at the Oak Ridge National Laboratory's Thermonuclear Division.

Report documenting research and developments made by the Health Physics Division of the Oak Ridge National Laboratory.

This article describes a test procedure for a liquid high explosive. The liquid to be tested is NTN, a mixture of nitromethane, tetranitomethane, and 1-nitropropane in 52, 33.3, and 14.7 weight per cent. The test is to study the sensitivity of the explosive to shock by firing it in projectiles from a M1A1 155mm howlitzer, with a charge such that it will not exceed 16,500 g`s acceleration.

The Reactor Nuclear Data Tape Programs were designed to compile and/or modify a nuclear data library tape from basic nuclear cross-section input. It is intended that this cross-section library tape will be utilized to provide up-to- date nuclear data for various reactor codes. Program RNDP was designed to compile an initial tape from certain minimal input data, or to add or delete complete blocks of data from an existing tape. Program RNDM was designed to compile and add to an existing tape macroscopic cross section data consisting of mixtures of microscopic cross sections available on the tape. Program RNOC was designed to modify and copy an existing tape, or to compile a new tape from sets of binary cards punched by Program RNDP. These programs were written using the FORTrAN-II system of automatic coding for the IBM7090. (auth)

The absolute differential cross sections for elastic scattering of 31-Mev He3 ions on Be, Al, Cu, Sn(nat), Sn120, and Bi have been measured in the angular range of approximately 10 to 120 deg in the center-of-mass system. Thin self-supporting foil targets were chosen to span the parameter A 1/3, where A is the target mass number. The first excited states of the isotopes of the above elements had sufficient energy separation from the ground state to enable elastic scattering to be resolved from inelastic scattering. The detection system, consisting of Cal(Tl) scintillation crystals, was capable of 3%pulse-height resolution and 1 degree angular resolution. Characteristically, the light-element angular distributions show strong diffraction effects. The differential cross section divided by the Rutherford cross section decreases exponentially at large angles for the heavy elements, and the differential cross sections break away from Rutherford behavior at angles which increase almost linearly with increase of atomic number of the target nucleus. A comparison of the results for natural tin, and tin enriched to 85% in Sn120, indicated that within the experimental uncertainties over the measured angular interval, there were no pronounced isotopic effects. The data are presented both in tabular and graphical form to allow …

The distortion behavior of graphite as a function of irradiation temperature is reviewed. The behavior of needlecoke and CSF graphite was examined over moderate exposures in the GETR. Results showed needle-coke to be less contracting than CSF. Details of contraction show a minimum contraction rate per 10/sup 21/ nvt at 600 to 800 deg C for both types. Limitations to be placed on the data presented are listed. (P. C.H.)

"A comparison of the grafting of a 2:1 molar mixture of methacrylic acid and styrene to both polypropylene film and fabric using CO60 source and electron accelerator as sources of ionizing radiation is made on the basis of mutual or simultaneous grafting and post-irradiation grafting.

"Rates of acetylene polymerization induced by Kr/sup 85/ in d-c fields were up to 15 times greater than those observed when no fields were imposed. Work to determine the relations between acetylene pressure, Kr/sup 85/ concentration, and the field intensity is continuing. In other activities, equipment is being designed to study the effects of megacycle electric fields on radioinduced chemical reactions."

""Progress is reported on: design of a continuous flow system for the irradiation of silane using a Cos5 source; pile irradiation of silane samples at elevated temperatures; investigation of materials other than silane, including nonsilicon compounds as well as those containing the silyl group; modification of the existing vacuum system for handling larger quantities of silane as well as increasing the accuracy of the pressure measurements; and use of an electric discharge for the decomposition of silane. Studies were continued on the radiation- and thermalinduced decomposition of sikane at 325 and 350 deg C. A preliminary value of G= 33 was obtained for silane."

"Progress is reported on: design of a continuous flow system for the irradiation of silane using a Cos5 source; pile irradiation of silane samples at elevated temperatures; investigation of materials other than silane, including nonsilicon compounds as well as those containing the silyl group; modification of the existing vacuum system for handling larger quantities of silane as well as increasing the accuracy of the pressure measurements; and use of an electric discharge for the decomposition of silane. The work performed during the period of this report consisted of the following: 1. Preparation of samples of trichlorosilane and hydrogen and subsequent thermal and irradiation studies, and analysis of these samples. 2. Preparation of mixed samples of silane and argon and subsequent thermal and irradiation studies and and analysis. 3. Outlining of future investigations to be conducted on this project."