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  1. Characteristics of larval and postlarval stages for Pagurus in Monterey Bay, California

    Putnam, John D.
    June 1965.

    The larvae and young adults of Pagurus samuelis (Stimpson, 1857), Pagurus hirsutiusculus (Dana, 1857), Pagurus granosimanus (Stimpson, 1859), and Pagurus hemphillii (Benedict, 1851) were comparative studied to discover characters by which these species could be readily distinguished without the use of a high magnification microscope. P. samuelis and P. hirsutuisculus, P. granosimanus and P. hemphillii, and P. ochotensis could easily be separated into the above groups but further identification proved difficult in the young adults and sometimes impossible in the larvae.

  2. Power Burst Facility [electronic resource] : U(18)O2-CaO-ZrO2 Fuel Rods in Water

    Washington, D.C. : United States. Office of the Assistant Secretary for Nuclear Energy ; Oak Ridge, Tenn. : distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2009

    The Power Burst Facility (PBF) reactor operated from 1972 to 1985 on the SPERT Area I of the Idaho National Laboratory, then known as Nuclear Reactor Test Station. PBF was designed to provide experimental data to aid in defining thresholds for and modes of failure under postulated accident conditions. PBF reactor startup testing began in 1972. This evaluation focuses on two operational loading tests, chronologically numbered 1 and 2, published in a startup-test report in 1974 [1]. Data for these tests was used by one of the authors to validate a MCNP model for criticality safety purposes [2]. Although specific references to original documents are kept in the text, all the reactor parameters and test specific data presented here was adapted from that report. The tests were performed with operational fuel loadings, a stainless steel in-pile tube (IPT) mockup, a neutron source, four pulse chambers, two fission chambers, and one ion chamber. The reactor's four transition rods (TRs) and control rods (CRs) were present but TR boron was completely withdrawn below the core and CR boron was partially withdrawn above the core. Test configurations differ primarily in the number of shim rods, and consequently the number of fuel rods included in the core. The critical condition was approached by incrementally and uniformly withdrawing CR boron from the core. Based on the analysis of the experimental data and numerical calculations, both experiments are considered acceptable as criticality safety benchmarks.

    Online OSTI

  3. Keeping pace with science and engineering : case studies in environmental regulation

    Washington, D.C. : National Academy Press, 1993.

    The technical basis of environmental regulation is always at the edge of scientific and engineering understanding. As knowledge improves, questions will inevitably arise about past decisions. Understanding how the regulatory system accommodates changing scientific and engineering knowledge is vital for achieving environmental values. In this new volume, seven case studies shed light on the interplay between environmental regulation and scientific and engineering understanding, with practical conclusions on how science and engineering should be used for more sound and timely regulatory decision making. The book provides helpful timelines of scientific and regulatory developments for the cases, which include * Factors impeding clean-up strategies in the Chesapeake Bay. * Pivotal questions in the regulation of ambient ozone concentrations. * How science has been heeded but also ignored in regulation of new municipal waste combustors. * Impact of scientific findings on control of chlorination by-products. * Acid rain and what can be learned about research and public policy debate. * Controversy over the need for formaldehyde regulation. * The effect of public perception on management decisions concerning dioxin. This volume will be of practical interest to policymakers, business and environmental advocates, scientists, engineers, researchers, attorneys, faculty, and students.

    Online EBSCO Academic Comprehensive Collection


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