Proceedings of the Conference on Nuclear Structure in the Nineties

The proceedings present the most recent results of experimental and theoretical nuclear spectroscopy, revealing the effects of rapid rotation and thermal fluctuations on the shapes and superfluid properties of a wide range of atomic nuclei. Unstable and novel shapes are emphasized, e.g. super-and hyper-deformed shapes, and triaxial quadrupole and octupole shapes (both static and vibrational). Theoretical treatments are given in terms of a variety of mean field models, as well as the Fermion Dynamical Symmetry Model and the Interacting Boson Model. New experimental methods of gamma-ray spectroscopy are discussed, including fluctuation analysis and energy-ordered gamma ray spectroscopy.

The Structural Aging Program provides the US Nuclear Regulatory Commission with potential structural safety issues and acceptance criteria for use in continued service assessments of nuclear power plant safety-related concrete structures. The program was organized under four task areas: Program Management, Materials Property Data Base, Structural Component Assessment/Repair Technology, and Quantitative Methodology for Continued Service Determinations. Under these tasks, over 90 papers and reports were prepared addressing pertinent aspects associated with aging management of nuclear power plant reinforced concrete structures. Contained in this report is a summary of program results in the form of information related to longevity of nuclear power plant reinforced concrete structures, a Structural Materials Information Center presenting data and information on the time variation of concrete materials under the influence of environmental stressors and aging factors, in-service inspection and condition assessments techniques, repair materials and methods, evaluation of nuclear power plant reinforced concrete structures, and a reliability-based methodology for current and future condition assessments. Recommendations for future activities are also provided. 308 refs., 61 figs., 50 tabs.