damage tolerance of nuclear graphite at elevated

International Atomic Energy Agency

The IAEA is the world's centre for cooperation in the nuclear field, promoting the safe, secure and peaceful use of nuclear technology. It works in a wide range of areas including energy generation, health, food and agriculture and environmental protection.

Corrosion

Galvanic corrosion occurs when two different metals have physical or electrical contact with each other and are immersed in a common electrolyte, or when the same metal is exposed to electrolyte with different concentrations.In a galvanic couple, the more active metal (the anode) corrodes at an accelerated rate and the more noble metal (the cathode) corrodes at a slower rate.

Rev1 plays central roles in mammalian DNA‐damage

We thus demonstrated that elevated expression of Rev1 alone is sufficient to confer enhanced UV‐damage tolerance and that this tolerance depends on its physical interaction with monoubiquitinated PCNA and Polζ but is independent of Polη.

Detection of protein and DNA damage induced by elevated

of nuclear DNA damage was observed as tail length 8.70 m, tailed DNA 8.01%, and tail moment unit 34.18 in non-irrigated O 3-treated wheat nuclei. These results show that O 3-treatment alone induced high levels of oxidative protein and DNA damage in wheat 2

Activation of nuclear factor kappaB In vivo selectively

2004/9/1Activation of nuclear factor kappaB In vivo selectively protects the murine small intestine against ionizing radiation-induced damage. Wang Y(1), Meng A, Lang H, Brown SA, Konopa JL, Kindy MS, Schmiedt RA, Thompson JS, Zhou D.

Genomic determinants of coral heat tolerance across

Some like it hot Coral reefs are threatened by increasing temperatures. Acute temperature increases stress and damage corals. However, more gradual temperature changes can result in adaptation and subsequent tolerance for higher temperatures. Dixon et al. show that the heat tolerance that currently exists across coral populations from different latitudes can be inherited.

Composite Sheets

Choose from our selection of composite sheets, including over 1,400 products in a wide range of styles and sizes. In stock and ready to ship. With an aramid honeycomb core sandwiched between carbon fiber or fiberglass for rigidity, these panels are strong, but lightweight, and won't conduct heat.

A New Method to Measure Crack Extension in Nuclear

Graphite components, used as moderators, reflectors, and core-support structures in a High-Temperature Gas-Cooled Reactor, play an important role in the safety of the reactor. Specifically, they provide channels for the fuel elements, control rods, and coolant flow.

Irradiation responses and defect behavior of single

2018/10/1Nuclear power accounts for more than 11% of world electricity production and is a clean energy source with near-zero carbon emission.1,2 On the other hand, the long-term reliability and safety of nuclear power systems depend on the integrity of its structural materials.3 For future advanced fission and fusion reactors, the core structure materials are generally exposed to the aggressive

Damage Mechanics

Equation (7) gives the principal damage values [D.sub.1] and [D.sub.2].Based on geometrical damage mechanics, all elements in this matrix could be obtained by the method mentioned previously, and the anisotropic constitutive relation of jointed rock sample could finally be confirmed.

Chernobyl

Notes references Notes a. Chernobyl is the well-known Russian name for the site; Chornobyl is preferred by Ukraine. []b. Much has been made of the role of the operators in the Chernobyl accident. The 1986 Summary Report on the Post-Accident Review Meeting on the Chernobyl Accident (INSAG-1) of the International Atomic Energy Agency's (IAEA's) International Nuclear Safety Advisory Group

Tokaimura Criticality Accident

Tokaimura Criticality Accident 1999 (Updated October 2013) In 1999 three workers received high doses of radiation in a small Japanese plant preparing fuel for an experimental reactor. The accident was caused by bringing together too much uranium enriched to a

Damage Evolution in Stitched and Unstitched

Aymerich, F, Priolo, P. Damage Evolution in Stitched and Unstitched Graphite/Epoxy Laminates Subject to Low-Velocity Impact. Proceedings of the ASME 8th Biennial Conference on Engineering Systems Design and Analysis.Volume 3: Dynamic Systems and

Earthquake simulations check nuclear reactors can safely

David Pitt is a project engineer at Atkins Nuclear Power Group, where he manages the Seismic Damage Tolerance Assessment project. "I've been at Atkins for two years now," he says. "Previously I was in New Zealand working as a senior engineer in the hydroelectric sector, and before that I was an engineer in the oil and gas industry.

Damage tolerance of nuclear graphite at elevated

article{osti_1408441, title = {Damage tolerance of nuclear graphite at elevated temperatures}, author = {Liu, Dong and Gludovatz, Bernd and Barnard, Harold S. and Kuball, Martin and Ritchie, Robert O.}, abstractNote = {Nuclear-grade graphite is a critically important high-temperature structural material for current and potentially next generation of fission reactors worldwide.

Status of materials development for molten salt reactors

2021/5/5article{osti_5195742, title = {Status of materials development for molten salt reactors}, author = {McCoy, Jr., H. E.}, abstractNote = {Experience to date has shown that in a molten-salt reactor environment the alloy Hastelloy N is embrittled by irradiation and suffers shallow intergranular cracking due to the fission product tellurium.

FHR Materials, Fuels and Components White Paper Integrated

However, graphite damage is also observed when Zr or Na redox is added into the salt. This shows optimal redox control is important to minimize corrosion of metallic materials and also avoid graphite damage. Further study is needed on the compatibility of

Tokaimura Criticality Accident

Tokaimura Criticality Accident 1999 (Updated October 2013) In 1999 three workers received high doses of radiation in a small Japanese plant preparing fuel for an experimental reactor. The accident was caused by bringing together too much uranium enriched to a

ISIS Graphite and MAX Phases: Examination of Nuclear

More recently, MAX phases are another class of hexagonal 2D carbide or nitride that are emerging as potential materials for nuclear fuel cladding and pump impellers, on account of their high mechanical and irradiation damage tolerance at elevated temperatures.

Damage Mechanics

Equation (7) gives the principal damage values [D.sub.1] and [D.sub.2].Based on geometrical damage mechanics, all elements in this matrix could be obtained by the method mentioned previously, and the anisotropic constitutive relation of jointed rock sample could finally be confirmed.

Outstanding radiation resistance of tungsten

A body-centered cubic W-based refractory high entropy alloy with outstanding radiation resistance has been developed. The alloy was grown as thin films showing a bimodal grain size distribution in the nanocrystalline and ultrafine regimes and a unique 4-nm lamella-like structure revealed by atom probe tomography (APT). Transmission electron microscopy (TEM) and x-ray diffraction show certain

Irradiation responses and defect behavior of single

2018/10/1Nuclear power accounts for more than 11% of world electricity production and is a clean energy source with near-zero carbon emission.1,2 On the other hand, the long-term reliability and safety of nuclear power systems depend on the integrity of its structural materials.3 For future advanced fission and fusion reactors, the core structure materials are generally exposed to the aggressive

High

2018/12/18Graphite is an ideal solid moderating material with good irradiation performance in high-temperature gas-cooled reactors (HTGRs) and is also used as a high-temperature electrode (synthetic electrode grade graphite) for fuel cells and batteries.1–7 It has ideal properties for electrode and nuclear applications, such as being chemically inert, highly conductive, resistant to corrosion and

Nuclear Materials: Avoiding Structural Integrity Failures

Paul Mummery lead the Nuclear Graphite Research Group (NGRG) at the University of Manchester where his post is funded by the UK's nuclear regulator, the Office for Nuclear Regulation (ONR). He is leading the activity in providing the mechanistic understanding of the effects of irradiation damage on graphite that underpin the empirical relationships used by the industry.

Damage Evolution in Stitched and Unstitched

Aymerich, F, Priolo, P. Damage Evolution in Stitched and Unstitched Graphite/Epoxy Laminates Subject to Low-Velocity Impact. Proceedings of the ASME 8th Biennial Conference on Engineering Systems Design and Analysis.Volume 3: Dynamic Systems and

Role of Nanolaminated Crystal Structure on the

It is interesting to compare the radiation damage tolerance of Ti 3 SiC 2 with the binary carbide SiC. Amorphization appears in SiC at low level of damage, usually 1 dpa; and its swelling is about seven times higher than that of Ti 3 SiC 2 [].

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