Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 50
Book Description
IAEA Co-ordinated Research Program: "Round Robin" on Measuring the Velocity of Delayed Hydride Cracking (DHC)
Author: Preparation of material and specimens for the iaea co-ordinated research programme on delayed hydride cracking
Author: K. V. KiddDelayed Hydride Cracking in Zirconium Alloys in Pressure Tube Nuclear Reactors
Author: International Atomic Energy AgencyPublisher: IAEA
ISBN:
Category : Business & Economics
Languages : en
Pages : 102
Book Description
Dated October 2004. With CD-ROM containing additional information inside back cover
Round robin studies of delayed hydride crack velocity in zr-2.5 nb pressure tubes
Author: G. K. ShekDelayed hydride cracking (dhc) velocity (axial) at 250 degrees celsius for zr-2.5nb chepetski pressure tube materials
Author: R. ChoubeyDelayed hydride cracking (dhc) velocity (axial) at 250 degrees c for zr-2.5nb cezus pressure tube materials
Author: R. ChoubeyInitiation 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.
Dorland's Dictionary of Medical Acronyms and Abbreviations
Author: DorlandPublisher: Elsevier Health Sciences
ISBN: 0323442544
Category : Medical
Languages : en
Pages : 481
Book Description
Medical acronyms and abbreviations offer convenience, but those countless shortcuts can often be confusing. Now a part of the popular Dorland's suite of products, this reference features thousands of terms from across various medical specialties. Its alphabetical arrangement makes for quick reference, and expanded coverage of symbols ensures they are easier to find. Effective communication plays an important role in all medical settings, so turn to this trusted volume for nearly any medical abbreviation you might encounter. - Symbols section makes it easier to locate unusual or seldom-used symbols. - Convenient alphabetical format allows you to find the entry you need more intuitively. - More than 90,000 entries and definitions. - Many new and updated entries including terminology in expanding specialties, such as Nursing; Physical, Occupational, and Speech Therapies; Transcription and Coding; Computer and Technical Fields. - New section on abbreviations to avoid, including Joint Commission abbreviations that are not to be used. - Incorporates updates suggested by the Institute for Safe Medication Practices (ISMP).
Zirconium
Author: Oswald KubaschewskiPublisher:
ISBN: 9789201492760
Category : Zirconium
Languages : en
Pages : 268
Book Description
Publications of Los Alamos Research
Author: Los Alamos National LaboratoryPublisher:
ISBN:
Category : Research
Languages : en
Pages : 176
Book Description