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DELAYED HYDRIDE CRACKING IN ZIRCALOY FUEL CLADDING – AN IAEA COORDINATED RESEARCH PROGRAMME
C. COLEMAN,V. GRIGORIEV,V. INOZEMTSEV,V. MARKELOV,M. ROTH,V. MAKAREVICIUS,Y. S. KIM,KANWAR LIAGAT ALI,J.K. CHAKRAVARTTY,R. MIZRAHI,R. LALGUDI 한국원자력학회 2009 Nuclear Engineering and Technology Vol.41 No.2
The rate of delayed hydride cracking (DHC), V, has been measured in cold-worked and stress-relieved Zircaloy-4 fuel cladding using the Pin-Loading Tension technique. At 250 °C the mean value of V from 69 specimens was 3.3(±0.8)x10⁻⁸ m/s while the temperature dependence up to 275 °C was described by Aexp(-Q/RT), where Q is 48.3 kJ/mol. No cracking or cracking at very low rates was observed at higher temperatures. The fracture surface consisted of flat fracture with no striations. The results are compared with previous results on fuel cladding and pressure tubes.
DELAYED HYDRIDE CRACKING IN ZIRCALOY FUEL CLADDING - AN IAEA COORDINATED RESEARCH PROGRAMME
Coleman, C.,Grigoriev, V.,Inozemtsev, V.,Markelov, V.,Roth, M.,Makarevicius, V.,Kim, Y.S.,Ali, Kanwar Liagat,Chakravartty, J.K.,Mizrahi, R.,Lalgudi, R. Korean Nuclear Society 2009 Nuclear Engineering and Technology Vol.41 No.2
The rate of delayed hydride cracking (DHC), V, has been measured in cold-worked and stress-relieved Zircaloy-4 fuel cladding using the Pin-Loading Tension technique. At $250^{\circ}C$ the mean value of V from 69 specimens was $3.3({\pm}0.8)x10^{-8}$ m/s while the temperature dependence up to $275^{\circ}C$ was described by Aexp(-Q/RT), where Q is 48.3 kJ/mol. No cracking or cracking at very low rates was observed at higher temperatures. The fracture surface consisted of flat fracture with no striations. The results are compared with previous results on fuel cladding and pressure tubes.
Bimol C. Roy,Patience Coleman,Meghan Markowsky,Kun Wang,Yongbo She,Caroline Richard,Spencer D. Proctor,Heather L. Bruce 한국축산식품학회 2024 한국축산식품학회지 Vol.44 No.1
This study investigated how birth weight differences in piglets affected carcass and muscle fiber properties as well as meat quality at slaughter. Within litters, piglets were grouped according to their birth weight as either normal (NBW; 1.62–1.73 kg) or low (LBW; 1.18–1.29 kg). At 5 weeks of age, NBW piglets were randomly transitioned to control (C) or isocaloric high fat diets derived from non-dairy (HF), while LBW piglets were randomly transitioned to high fat diets derived from non-dairy (HF) or dairy sources (HFHD). Piglets were reared in individual pens under standardized housing and feeding conditions. Live weight was recorded weekly, and pigs were slaughtered at 12 weeks of age. Hot carcass weights, dressing percentages, lean meat yield, and primal cut proportions were determined. The m. longissimus thoracis was collected from the right side of the carcass for measurement of physical and chemical properties of meat and muscle fiber characteristics. Results indicated that LBW pigs compensated for their live weight compared to NBW pigs at 6 weeks of age. The mean muscle fiber diameter of LBW-HFHD group is significantly higher than NBW-C and NBW-HF group, and the type I muscle fiber diameter is significantly higher than NBW-C group. Dairy fat inclusion in LBW pig diet reduced carcass back fat thickness. This increased the calculated lean meat yield to be comparable to that of NBW pigs fed a commercial diet. Incorporating dairy-sourced high-fat into LBW pigs’ diets appears to be an effective strategy for producing carcasses equivalent to NBW pigs.
Kim, M. E.,Gorman, G. M.,Cho, N. M.,Kong, K. S.,Champaneria, C. N.,Greene, J. E.,Bruckner, C. L.,Walsworth, C. R.,Do, V. A.,Coleman, D. W.,Hew, P. R.,Chung, S. C.,Jung, W.,Seo, H. C.,Hwang, Y. I.,Chu, 대한전자공학회 1993 ICVC : International Conference on VLSI and CAD Vol.3 No.1
This paper .discusses the GaAs HBT device and IC technology and its application to commercial wireless communication systems in the 0.8-6 GHz frequency range. Key performance/cost advantages of the GaAs HBT previously established over silicon bipolar and GaAs MESFET in this frequency regime are now being applied to critical RF front-end requirements of wireless voice and data communication systems. GaAs HBT components developed far such wireless systems include small-signal .and power functions which offer combinations of higher gain-bandwidth, higher efficiency, lower distortion, wider dynamic range and simpler design implementations. GaAs HBT/IC fabrication technology, device/IC performance and system applications are discussed.
Mills, R.W.,Slingsby, B.M.,Coleman, J.,Collins, R.,Holt, G.,Metelko, C.,Schnellbach, Y. Korean Nuclear Society 2020 Nuclear Engineering and Technology Vol.52 No.9
The standard method for calculating anti-neutrino emissions from a reactor involves knowing the fractional fission rates for the most important fissioning nuclides in the reactor. To calculate these rates requires detailed reactor physics calculations based upon the reactor design, fuel design, burnup dependent fuel composition, location of specific fuel assemblies in the core and detailed operational data from the reactor. This has only been published for a few reactors during specific time periods, whereas to be of practical use for anti-neutrino reactor monitoring it is necessary to be able to predict these on the publicly available information from any reactor, especially if using these data to subtract the anti-neutrino signal from other reactors to identify an undeclared reactor and monitor its operation. This paper proposes a method to estimate the fission fractions for a specific reactor based upon publicly available information and provides a database based upon a series of spent fuel inventory calculations using the FISPIN10 code and its associated data libraries.
the CONCORD Working Group,Matz, M.,Coleman, M.P.,Sant, M.,Chirlaque, M.D.,Visser, O.,Gore, M.,Allemani, C. Academic Press 2017 Gynecologic oncology Vol.144 No.2
Objective: Ovarian cancers comprise several histologically distinct tumour groups with widely different prognosis. We aimed to describe the worldwide distribution of ovarian cancer histology and to understand what role this may play in international variation in survival. Methods: The CONCORD programme is the largest population-based study of global trends in cancer survival. Data on 681,759 women diagnosed during 1995-2009 with cancer of the ovary, fallopian tube, peritoneum and retroperitonum in 51 countries were included. We categorised ovarian tumours into six histological groups, and explored the worldwide distribution of histology. Results: During 2005-2009, type II epithelial tumours were the most common. The proportion was much higher in Oceania (73.1%), North America (73.0%) and Europe (72.6%) than in Central and South America (65.7%) and Asia (56.1%). By contrast, type I epithelial tumours were more common in Asia (32.5%), compared with only 19.4% in North America. From 1995 to 2009, the proportion of type II epithelial tumours increased from 68.6% to 71.1%, while the proportion of type I epithelial tumours fell from 23.8% to 21.2%. The proportions of germ cell tumours, sex cord-stromal tumours, other specific non-epithelial tumours and tumours of non-specific morphology all remained stable over time. Conclusions: The distribution of ovarian cancer histology varies widely worldwide. Type I epithelial, germ cell and sex cord-stromal tumours are generally associated with higher survival than type II tumours, so the proportion of these tumours may influence survival estimates for all ovarian cancers combined. The distribution of histological groups should be considered when comparing survival between countries and regions.
the CONCORD Working Group,Matz, M.,Coleman, M.P.,Carreira, H.,Salmeron, D.,Chirlaque, M.D.,Allemani, C. Academic Press 2017 Gynecologic oncology Vol.144 No.2
Objective: Ovarian cancer comprises several histological groups with widely differing levels of survival. We aimed to explore international variation in survival for each group to help interpret international differences in survival from all ovarian cancers combined. We also examined differences in stage-specific survival. Methods: The CONCORD programme is the largest population-based study of global trends in cancer survival, including data from 60 countries for 695,932 women (aged 15-99years) diagnosed with ovarian cancer during 1995-2009. We defined six histological groups: type I epithelial, type II epithelial, germ cell, sex cord-stromal, other specific non-epithelial and non-specific morphology, and estimated age-standardised 5-year net survival for each country by histological group. We also analysed data from 67 cancer registries for 233,659 women diagnosed from 2001 to 2009, for whom information on stage at diagnosis was available. We estimated age-standardised 5-year net survival by stage at diagnosis (localised or advanced). Results: Survival from type I epithelial ovarian tumours for women diagnosed during 2005-09 ranged from 40 to 70%. Survival from type II epithelial tumours was much lower (20-45%). Survival from germ cell tumours was higher than that of type II epithelial tumours, but also varied widely between countries. Survival for sex-cord stromal tumours was higher than for the five other groups. Survival from localised tumours was much higher than for advanced disease (80% vs. 30%). Conclusions: There is wide variation in survival between histological groups, and stage at diagnosis remains an important factor in ovarian cancer survival. International comparisons of ovarian cancer survival should incorporate histology.