Sökning: "decay ratio"

Visar resultat 1 - 5 av 44 avhandlingar innehållade orden decay ratio.

  1. 1. Noise diagnostics of Stationary and Non-Stationary Reactor Processes

    Författare :Carl Sunde; [2007]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; core-barrel vibrations; break-frequency method; wavelet; decay ratio; detector tube impacting; two-phase flow; spectral analysis; noise diagnostics;

    Sammanfattning : This thesis concerns the application of noise diagnostics on different problems in the area of reactor physics involving both stationary and non-stationary core processes. Five different problems are treated, divided into three different parts. LÄS MER

  2. 2. The Effect of Different Perturbations on the Stability Analysis of Light Water Reactors

    Författare :Victor Dykin; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; stability indicators; damped harmonic oscillator; decay ratio; BWR and PWR stability; reduced order models; propagating density perturbation; non-white driving force; autocorrelation function; Green s function technique; density wave oscillations;

    Sammanfattning : Neutron noise analysis techniques are studied and developed, with primary useof determining the stability of Boiling Water Reactors (BWRs). In particular, the role ofa specific perturbation prevailing in Light Water Reactors, the propagating densityperturbation, in the stability of BWRs and on the noise field of LWRs in general, isinvestigated by considering three topics. LÄS MER

  3. 3. Noise Applications in Light Water Reactors with Traveling Perturbations

    Författare :Victor Dykin; [2012]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Green s function technique; transit times; decay ratio; cross-correlation function; void fraction; global and regional instabilities; propagating density perturbation; BWR stability; reduced order models; non-white driving force; local component; Monte Carlo; space-dependent neutron noise; density wave oscillations;

    Sammanfattning : Neutron noise induced by perturbations traveling with the coolant of light water reactors (LWRs) is investigated. Different methods to simulate the effect of propagating perturbations are considered. The studies are performed in both open- and closed-loop systems and summarized in three chapters. LÄS MER

  4. 4. Plasmonic Properties of Pt and Pd Nanodisks

    Författare :Christoph Langhammer; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; scattering; electron-hole pairs; plasmon mediated photochemistry; Pd; Localized Surface Plasmon Resonance; Pt; plasmon decay; absorption; extinction; branching ratio;

    Sammanfattning : .... LÄS MER

  5. 5. On Alpha-decay and Alpha Clustering

    Detta är en avhandling från Zagreb University

    Författare :Gordana Dodig-Crnkovic; Göteborgs universitet.; Gothenburg University.; [1988]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The half-life for the Alpha-decay of 212 Po is calculated within a harmonic oscillator representation. Clustering induced by the nuclear interaction appear by considering a large configuration space. The role of clusterisation in the alpha-decay process is clearly demonstrated. LÄS MER