Author: E. C. W. PerrymanPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
An appraisal of delayed hydrogen cracking in zr-2 1/2 percent nb pressure tubes
Author: E. C. W. PerrymanA further appraisal of delayed hydrogen cracking zr-2 1/2 percent nb and zircaloy-2 pressure tubes
Author: E. W. C. PerrymanDelayed hydrogen cracking in zr-2.5 percent nb and zircaloy-2 pressure tubes
Author: E. C. W. PerrymanEvaluation and prevention of delayed hydrogen cracking of ht zr-2.5 wt percent nb pressure tubes
Author: Scientific and Technical Aerospace Reports
Author: Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1282
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Delayed hydrogen cracking in zr-2.5 wt percent nb alloy
Author: C. E. ColemanERDA Energy Research Abstracts
Author: United States. Energy Research and Development AdministrationPublisher:
ISBN:
Category : Medicine
Languages : en
Pages : 1104
Book Description
ERDA Energy Research Abstracts
Author: United States. Energy Research and Development Administration. Technical Information CenterPublisher:
ISBN:
Category : Force and energy
Languages : en
Pages : 1682
Book Description
Zirconium in the Nuclear Industry
Author: Gerry D. MoanPublisher: ASTM International
ISBN: 0803128959
Category : Nuclear fuel claddings
Languages : en
Pages : 891
Book Description
Annotation The 41 papers of this proceedings volume were first presented at the 13th symposium on Zirconium in the Nuclear Industry held in Annecy, France in June of 2001. Many of the papers are devoted to material related issues, corrosion and hydriding behavior, in-reactor studies, and the behavior and properties of Zr alloys used in storing spent fuel. Some papers report on studies of second phase particles, irradiation creep and growth, and material performance during loss of coolant and reactivity initiated accidents. Annotation copyrighted by Book News, Inc., Portland, OR.
Initiation of Delayed Hydride Cracking in Zr-2.5Nb Micro Pressure Tubes
Author: Ravi Kumar SundaramoorthyPublisher:
ISBN:
Category :
Languages : en
Pages : 280
Book Description
Pressure tubes pick up hydrogen while they are in service within CANDU reactors. Sufficiently high hydrogen concentration can lead to hydride precipitation during reactor shutdown/repair at flaws, resulting in the potential for eventual rupture of the pressure tubes by a process called Delayed Hydride Cracking (DHC). The threshold stress intensity factor (KIH) below which the cracks will not grow by delayed hydride cracking of Zr-2.5Nb micro pressure tubes (MPTs) has been determined using a load increasing mode (LIM) method at different temperatures. MPTs have been used to allow easy study of the impact of properties like texture and grain size on DHC. Previous studies on MPTs have focused on creep and effects of stress on hydride orientation; here the use of MPTs for DHC studies is confirmed for the first time. Micro pressure tube samples were hydrided to a target hydrogen content of 100 ppm using an electrolytic method. For DHC testing, 3 mm thick half ring samples were cut out from the tubes using Electrical Discharge Machining (EDM) with a notch at the center. A sharp notch with a root radius of 15 mu m was introduced by broaching to facilitate crack initiation. The direct current potential drop method was used to monitor crack growth during the DHC tests. For the temperature range tested the threshold stress intensity factors for the micro pressure tube used were found to be 6.5-10.5 MPa.m1/2 with the value increasing with increasing temperature. The average DHC velocities obtained for the three different test temperatures 180, 230 and 250oC were 2.64, 10.87 and 8.45 x 10-8 m/s, respectively. The DHC data obtained from the MPTs are comparable to the data published in the literature for full sized CANDU pressure tubes.