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Materials and water chemistry research results associated with the development of the Oconee-1 Reactor steam generator are presented. A summary of water chemistry data acquired during preoperational testing and power operation to date is also included. These data confirm the operational practicality of the nuclear once-through concept using volatile water treatment and high purity condensate demineralized feedwater.

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The semiinclusive reaction p+p {yields} n charged particles + anything was investigated with nuclear emulsions irradiated with 200 GeV/c protons at the NAL accelerator (Batavia, US). They measured angles {Theta} of all charged particles. In every event particles were ordered on rapidity which was approximated by the value y = -lntg {Theta}lab/2. In every event particles were numbered on increasing the rapidity. Let us consider, for example, distributions of ordered rapidities and distributions of differences of various ordered rapidities and try to make a physical conclusion from the analysis of these distributions.

The investigation of interactions of hadrons with the nucleus in recent time became very important, and there is a hope that it can give the information about the systems produced in this process (lifetime, cross sections etc.) The nuclear photoemulsions are a good detector at the investigation of hadron-nucleus interactions due to a high spatial resolution and a possibility of detection of particles nearly at all energies that enables to study the characteristics of both fast and slow particles. The consistence of emulsion enables to obtain the characteristics of interactions both on light (CNO, <A> = 14) and on heavy(Ag,Br,<A> = 94) nuclei.

The recent discoveries of heavy narrow resonances at masses of 3.1 and 3.7 Gev came at the same time as the successful testing by our group of the electron beam in the Fermilab Tagged Photon Facility. The timing is perfect, as this facility with its clean environment and relatively high photon fluxes and energies will be the ideal location for several important experiments suggested by the new results. We outline below the new significance of our experiment to measure the photon total cross section (Experiment 25A), as well as six other experiments to study the new phenomena we can perform with little increase in running time and with the apparatus already being prepared for Experiment 25. This apparatus is particularly well suited for these experiments which include a definitive check on whether the new resonances are photo produced, a search for a pseudoscaler particle made of charmed quarks and a study of neutral decay modes (which may well be dominant) of new particles. Several of these experiments can most likely be performed nowhere else but the Tagged Photon Lab. We propose to spend some time during testing of the tagging system and the Experiment 25 apparatus to determine the feasibility …

In the estimation of the output in kW/h produced by the geothermal power generation, it is required to know the well characteristics, the heat cycle in the power plant, the output characteristics and the efficiency. Of these three in the latter are seemed to be constant in the present power plant, while only the well characteristics varies in the wide range. One of great importance in the measurement of well characteristics is the determination of the steam flow rate from a well at a given well head pressure. it is, at present, well-known that the corresponding output in kW based on the steam flow rate is defined as the potential for the geothermal area involved. Specifically, in the case of hydrothermal systems the separate system must be equipped in order to know the steam flow rate.

Two BR-2 emulsion stacks 20cm x 10cm x 100 x 0,06 cm in size were irradiated by 200 Gev/c protons at the NAL accelerator in Batavia (US). The scanning along the track was performed. They observed 9339 inelastic interactions on the track length of 3303 m of primary protons.

We present here a summary of the properties of the M-3 neutral beam that might be of interest to other experimenters. We have determined the spectra and yields of neutrons, photons, and kaons. These data were taken in conjunction with experiments E-4 and E-230.

The experimental data on the multiplicity distributions for various kinds of secondaries produced in the proton-nucleus interactions in emulsion at 200 GeV/c and the correlations between them are presented and discussed. All the characteristics of heavy prongs (mean values <n{sub b}>, <n{sub g}>, <N{sub h}>, their distributions and correlations) are independent (or have a very weak dependence) on the collisions energy in the range 20-200 GeV/c. The data contradict to the cascade-evaporation model and qualitatively agree with the mechanism of particle emission via the long-lived intermediate states. The observed weak A-dependence ({approx} A{sup 0.15}) of shower particle distributions is in agreement with the calculated ones according to the simplified two-step model. It is shown that the n{sub s}-distributions agree well with KNO scaling law in the 67-200 GeV/c range, but the form of universal {psi}(n{sub s/n{sub s}})-function has a weak A-dependence.

The coherent diffraction production process is characterized by a very narrow angular distribution of secondary particles that is caused by a small 4-momentum transferred to the nuclei. Besides, they have neither excitation of nuclei, nor disintegration. The quantum numbers of the coherently produced system are the same as those of the incident particle. For proton coherent interactions the number of charged particles must be odd. In this work are presented the data about a cross section for production of three, five and seven charged particles at 200 Gev/c, the energy dependence of these cross sections as angular characteristics of the secondary particles in coherent reactions.

Three new experiments concerning coherent production from nuclei are discussed. Evidence is presented from the Carnegie Mellon-Illinois-Northwestern-Rochester collaboration regarding coherent production of A{sub 2} mesons in collisions of 23 GeV/c {pi}{sup -} with nuclear targets (C, Al, Cu, Ag). The coherent A{sub 2} cross section which vanishes in the forward direction is typically {approx} 2% that of the A{sub 1}. A neutron dissociation experiment conducted at BNL (Rochester-BNL collaboration) has studied the process n {yields} p{pi}{sup -} occurring coherently on nuclei. Using the optical model of Kolbig-Margolis a 30-40 mb cross section was extracted for the scattering of low-mass p{pi}{sup -} systems on nucleons for momenta of {approx} 13 GeV/c. A similar experiment conducted at FERMILAB (FNAL, University of Massachusetts, Northwestern, Rochester Collaboration) has indicated that at high energies ({approx} 200 GeV/c) Coulomb excitation of the neutron accounts for the major part of the reaction n + Pb {yields} (p{pi}{sup -}) + Pb. While p{pi}{sup -} production on C is dominated through Pomeranchukon exchange.

The future projected in the Project Independence Report calls heavily on nuclear energy. Validating the nuclear option will require technology improvement and implementation of new policy. But of all the issues that might compromise nuclear energy the most important now appears to be the public acceptability of this energy source.

For abstract see NSA 31:09262

The topic of computer graphics serves well to illustrate that AEC affiliated scientific computing installations are well represented in the forefront of computing science activities. The participant response to the technical program was overwhelming--both in number of contributions and quality of the work described. Session I, entitled Advanced Systems, contains presentations describing systems that contain features not generally found in graphics facilities. These features can be roughly classified as extensions of standard two-dimensional monochromatic imaging to higher dimensions including color and time as well as multidimensional metrics. Session II presents seven diverse applications ranging from high energy physics to medicine. Session III describes a number of important developments in establishing facilities, techniques and enhancements in the computer graphics area. Although an attempt was made to schedule as many of these worthwhile presentations as possible, it appeared impossible to do so given the scheduling constraints of the meeting. A number of prospective presenters 'came to the rescue' by graciously withdrawing from the sessions. Some of their abstracts have been included in the Proceedings.

A review of research on the dewetting and rewetting phases of loss-of-coolant accidents in LWR's is presented.