Author: Petit WiringgalihPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Experimental Investigation on the Initiation of Iodine-induced Stress Corrosion Cracking in Zirconium Alloys
Author: Petit WiringgalihRecent Studies of Crack Initiation During Stress Corrosion Cracking of Zirconium Alloys
Author: B. CoxPublisher:
ISBN:
Category : Cesium/Cadmium
Languages : en
Pages : 17
Book Description
In order to study crack initiation, we had first to develop a technique for reproducibly obtaining large numbers of very small crack initiation regions. The previously used test methods of stressed split-rings or pressurized (or compressed) tubes gave low success rates. Specimens either showed through-wall cracks, or no cracks, with few incipient cracks being observed. This suggested that the propagation time was short compared with the incubation time. Attempts to overcome this by unloading specimens following the first acoustic emission signal still gave a low frequency of incipient cracks.
Energy Research Abstracts
Author: Reduced Yield Stress for Zirconium Exposed to Iodine
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 8
Book Description
Iodine-induced stress-corrosion cracking (ISCC), a known failure mode for nuclear fuel cladding, occurs when iodine generated during the irradiation of a nuclear fuel pellet escapes the pellet through diffusion or thermal cracking and chemically interacts with the inner surface of the clad material, inducing a subsequent effect on the cladding's resistance to mechanical stress. To complement experimental investigations of ISCC, a reactive force field (ReaxFF) compatible with the Zr-I chemical and materials systems has been developed and applied to simulate the impact of iodine exposure on the mechanical strength of the material. The study shows that the material's resistance to stress (as captured by the yield stress of a high-energy grain boundary) is related to the surface coverage of iodine, with the implication that ISCC is the result of adsorption-enhanced decohesion.
ERDA Energy Research Abstracts
Author: Proceedings of the 15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems - Water Reactors
Author: Gabriell IlevbarePublisher: Springer
ISBN: 3319487604
Category : Technology & Engineering
Languages : en
Pages : 2354
Book Description
This 15th Edition of the International Conference on Materials Degradation in Light Water Reactors focuses on subject areas critical to the safe and efficient running of nuclear reactor systems through the exchange and discussion of reseach results as well as field operating and management experience.
Iodine-Induced Stress Corrosion of Zircaloy Fuel Cladding
Author: L. BrunisholzPublisher:
ISBN:
Category : Crack propagation
Languages : en
Pages : 17
Book Description
Because of its impact on nuclear power plant reliability, fuel cladding failure induced by pellet cladding interaction is a problem of major concern. It is usually analyzed as stress corrosion cracking caused by volatile fission products like iodine.
Chemical Aspects of Iodine-Induced Stress Corrosion Cracking of Zircaloys
Author: D. CubicciottiPublisher:
ISBN:
Category : Chemisorption
Languages : en
Pages : 12
Book Description
The thermodynamics of the zirconium-iodine system are summarized. In the gas phase are four stable species: ZrI4, ZrI3, ZrI2, and ZrI. Their enthalpies of formation and free-energy functions are presented. The only one of those species relevant to stress corrosion cracking (SCC) of zirconium alloys by iodine is the tetraiodide. There are also four solid compounds corresponding approximately in composition to the tetra, tri, di, and monoiodides. Ranges of solid solution composition, enthalpies of formation, and free-energy functions for those phases are given. Thermodynamic information for iodine chemisorbed on zirconium surfaces is also presented. These thermochemical results are used to analyze chemical behavior in situations related to SCC. In particular, reaction of cesium iodide with uranium dioxide in a fuel rod may produce an iodine pressure large enough to result in chemisorbtion of iodine on clean zirconium.
Energy Research Abstracts
Author: Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 712
Book Description
Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Modeling of Zircaloy Stress-Corrosion Cracking
Author: RE. EinzigerPublisher:
ISBN:
Category : Alloys
Languages : en
Pages : 32
Book Description
A phenomenological model has been developed for predicting iodine-induced stress-corrosion crack (SCC) initiation and growth in Zircaloy cladding. This model is capable of predicting various observed behaviors related to SCC.