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Effects Of Irradiation On The Iodine Induced Stress Corrosion Cracking Of Candu Zircaloy Fuel Cladding
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Book Synopsis Effects of irradiation on the iodine-induced stress corrosion cracking of CANDU zircaloy fuel cladding by : J. C. Wood
Download or read book Effects of irradiation on the iodine-induced stress corrosion cracking of CANDU zircaloy fuel cladding written by J. C. Wood and published by . This book was released on 1983 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Iodine-Induced Stress Corrosion of Zircaloy Fuel Cladding by : L. Brunisholz
Download or read book Iodine-Induced Stress Corrosion of Zircaloy Fuel Cladding written by L. Brunisholz and published by . This book was released on 1987 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Iodine induced stress corrosion cracking of Zircaloy fuel cladding materials by :
Download or read book Iodine induced stress corrosion cracking of Zircaloy fuel cladding materials written by and published by . This book was released on 2000 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Zirconium Oxide on the Stress-Corrosion Susceptibility of Irradiated Zircaloy Cladding by : RF. Mattas
Download or read book Effect of Zirconium Oxide on the Stress-Corrosion Susceptibility of Irradiated Zircaloy Cladding written by RF. Mattas and published by . This book was released on 1982 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cladding specimens were obtained from two fuel rods irradiated in the Big Rock Point Reactor to a burnup of ~8 gigawatt days per ton. Both claddings had a uniform, thick (~4 μm) zirconium oxide layer on the inner surface. The significant difference between the two rods was the degree of fission-gas release (0.2 versus 14.3 percent). The high-gas-release rod contained a significantly greater amount of fission-product deposits, and, in some areas, breaks in the inner-surface oxide were observed. The cladding speciments, with the fuel removed, were subjected to stress-rupture tests in an iodine environment using internal gas pressurization to evaluate their stress corrosion cracking (SCC) susceptibility. All tests were conducted at an initial iodine concentration of 0.6 mg/cm2 and a temperature of 325°C. Specimens from the high-gas-release rod exhibited signifciantly increased susceptibility to iodine SCC, with a threshold stress level of ~200 MPa as compared with ~280 MPa in the specimens from the low-gas-release rod. The results suggest that the inner-surface oxide provides a barrier to iodine penetration. Hence, the thick unbreached oxide on the low-gas-release rod provided greater resistance to iodine SCC than the breached oxide on the high-gas-release rod.
Author :R. Sejnoha Publisher :Philadelphia : American Society for Testing and Materials ISBN 13 : Total Pages :24 pages Book Rating :4.:/5 (1 download)
Book Synopsis Iodine-induced Stress Corrosion Cracking of Fixed Deflection Stressed Slotted Rings of Zircaloy Fuel Cladding by : R. Sejnoha
Download or read book Iodine-induced Stress Corrosion Cracking of Fixed Deflection Stressed Slotted Rings of Zircaloy Fuel Cladding written by R. Sejnoha and published by Philadelphia : American Society for Testing and Materials. This book was released on 1979 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modeling of Zircaloy Stress-Corrosion Cracking by : RE. Einziger
Download or read book Modeling of Zircaloy Stress-Corrosion Cracking written by RE. Einziger and published by . This book was released on 1984 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Failure Mechanisms of Irradiated Zr Alloys Related to PCI by : L. Rouillon
Download or read book Failure Mechanisms of Irradiated Zr Alloys Related to PCI written by L. Rouillon and published by . This book was released on 2000 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: The impact of irradiation damage accumulated in fuel claddings on their mechanical behavior and their susceptibility to iodine-induced stress corrosion cracking (I-SCC) was studied in irradiated zirconium and standard Zircaloy-4 sheets subjected to interrupted tension tests in methanol/iodine solutions and in an inert environment. The study of the I-SCC cracks has been carried out by SEM, while the characterization of the irradiation defects and the activated slip systems used TEM.
Book Synopsis Reduced Yield Stress for Zirconium Exposed to Iodine by :
Download or read book Reduced Yield Stress for Zirconium Exposed to Iodine written by and published by . This book was released on 2014 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis The effects of three different coatings on iodine-induced stress-corrosion cracking of zircaloy-4 by : B. A. Surette
Download or read book The effects of three different coatings on iodine-induced stress-corrosion cracking of zircaloy-4 written by B. A. Surette and published by . This book was released on 1976 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fracture of Zircaloy Cladding by Interactions with Uranium-Dioxide Pellets in Water Reactor Fuel Rods by : E. Smith
Download or read book Fracture of Zircaloy Cladding by Interactions with Uranium-Dioxide Pellets in Water Reactor Fuel Rods written by E. Smith and published by . This book was released on 1977 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The paper summarizes the main features of a detailed theoretical study of Zircaloy cladding fracture that is caused by the growth of stress corrosion cracks which form near fuel pellet cracks as a consequence of a power increase after a sufficiently high burn up. It is shown that unless stress corrosion crack growth in irradiated Zircaloy is able to proceed at very low stress intensifications, fracture is unlikely when there are uniform friction effects at the fuel-cladding interface, when the interfacial friction coefficient is less than unity, when a symmetric distribution of fuel cracks exists, and when symmetric interfacial slippage occurs (that is, "uniform" conditions). Otherwise, the observed fuel rod failures must be due to departures from uniform conditions, and this investigation shows that a very high interfacial friction coefficient, and particularly fuel-cladding bonding, are means of providing sufficient stress intensification at a cladding crack tip to explain the occurrence of cladding fractures.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1993 with total page 922 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fracture of Zircaloy-2 in an Environment Containing Iodine by : B. van der Schaaf
Download or read book Fracture of Zircaloy-2 in an Environment Containing Iodine written by B. van der Schaaf and published by . This book was released on 1974 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many Zircaloy cladding failures and the results of out-of-pile iodine stress corrosion tests are so similar as to suggest that fission of uranium produces enough iodine to attack the cladding locally. This paper presents a study of the effects of iodine on the fracture of Zircaloy-2 sheet being stressed very locally. Discs produced from Zircaloy-2 sheet were bent biaxially by pressing an indentor into the center of the disc. The force necessary to penetrate the discs decreased when either the initial amount of iodine or the temperature was increased, for cold-worked as well as recrystallized Zircaloy-2. Uniaxial short-time creep tests and tests with stressed slotted rings, both performed in environments containing iodine, did not result in stress corrosion cracking.
Book Synopsis Iodine Stress-corrosion Cracking in Irradiated Zircaloy Cladding. [PWR; BWR]. by :
Download or read book Iodine Stress-corrosion Cracking in Irradiated Zircaloy Cladding. [PWR; BWR]. written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Irradiated Zircaloy cladding specimens, which had experienced fluences from 0.1 to 6 x 10/sup 21/ n/cm/sup 2/ (E>0.1 MeV), were gas-pressure tested in an iodine environment to investigate their stress-corrosion cracking (SCC) susceptibility. The test temperatures and hoop stresses ranged from 320 to 360/sup 0/C and 150 to 500 MPa, respectively. The results indicate that irradiation, in general, increases the susceptibility of Zircaloy to iodine SCC. For specimens that experienced fluences>2 x 10/sup 21/ n/cm/sup 2/ (E>0.1 MeV), the 24-h failure stress was 177+-18 MPa, regardless of the preirradiation metallurgical condition. An analytical model for iodine SCC has been developed which agrees reasonably well with the test results.
Book Synopsis Iodine stress corrosion cracking of as-received zircaloy-4 at 700 degrees centigrade and 800 degrees centigrade by : D. Lim
Download or read book Iodine stress corrosion cracking of as-received zircaloy-4 at 700 degrees centigrade and 800 degrees centigrade written by D. Lim and published by . This book was released on 1981 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of iodine stress corrosion cracking (iscc) on the rupture behaviour of candu fuel sheathings at temperatures of 700 degrees c and 800 degrees c in isothermal hold tests were investigated under inert gas conditions. the sheaths were tested in the as-received condition with no braze zones or appendages . a test apparatus and specimen design were developed to provide an environment suitable for iscc during high temperature transient conditions. the burst tests showed that the deformation behaviour of the zircaloy tubes was not influenced by the presence of iodine at 800 degrees c at hoop stresses between 15 mpa-35 mpa, when subjected to temperature ramps of approximately 30 degrees c/s. iscc were observed at 700 degrees c at hoop stresses of 40-60-mpa. a three-fold reduction in sheath strain was observed in specimens which failed by iscc when compared with reference specimens containing no iodine. no significant difference in time-to-failure was observed between the reference specimens and the iodine specimens at both temperatures.
Book Synopsis Iodine- and cesium/cadmium-induced cracking of irradiated CANDU zircaloy cladding at 373-573 k - part 1 by : J. C. Wood
Download or read book Iodine- and cesium/cadmium-induced cracking of irradiated CANDU zircaloy cladding at 373-573 k - part 1 written by J. C. Wood and published by . This book was released on 1985 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Influence of Crystallographic Texture and Test Temperature on Initiation and Propagation of Iodine Stress-Corrosion Cracks in Zircaloy by : DB. Knorr
Download or read book Influence of Crystallographic Texture and Test Temperature on Initiation and Propagation of Iodine Stress-Corrosion Cracks in Zircaloy written by DB. Knorr and published by . This book was released on 1984 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of crystallographic texture on the initiation and the propagation of iodine stress-corrosion cracks in unirradiated Zircaloy is examined. Internal gas pressurization tests with iodine are performed on three tubing lots with different textures at 320 and 390°C. These smooth-bar tests yield data for time-to-failure and strain at failure versus hoop stress. Double-cantilever beam specimens provide crack velocity versus K and KISCC data at 300 to 310°C as a function of the texture ahead of the propagating crack. Smooth-bar threshold stress is strongly texture dependent over the temperature range 320 to 390°C. Basal poles oriented toward the direction of applied stress, such as a tangential tubing texture, result in faster crack propagation, lower KISCC, and a lower smooth-bar threshold stress. Plastic strain is shown to play an important role in crack intiation. The implication of texture and plastic strain effects on iodine SCC susceptibility of irradiated material is considered. Linear elastic fracture mechanics is found to be invalid for the short cracks observed in Zircaloy cladding.
Book Synopsis On the stress corrosion cracking of zircaloy fuel sheathing in iodine at 573 k by : C. P. Ashdown
Download or read book On the stress corrosion cracking of zircaloy fuel sheathing in iodine at 573 k written by C. P. Ashdown and published by . This book was released on 1975 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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