Sökning: "Chemical Accidents"

Visar resultat 11 - 15 av 23 avhandlingar innehållade orden Chemical Accidents.

1. 11. Accident-tolerant uranium nitride

   Författare :Aneta Herman; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; accident-tolerant fuel; uranium nitride; chromium; glucose; internal sol-gel;

   Sammanfattning : After the nuclear accident at Fukushima-Daiichi in 2011, a search for alternatives to a current fuel-clad standard UO2-Zircaloy was encouraged by government and industry and novel fuel-clad systems were selected. These systems are often referred to as Accident Tolerant systems, because of an improved response to severe accidents. LÄS MER

3. 12. Fabrication and Testing of Doped Uranium Nitride as an Accident Tolerant Fuel Alternative

   Författare :Luis Guillermo Gonzalez Fonseca; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; internal gelation; density; Uranium nitride; sintering; microspheres; doping; waterproofing.; ATF;

   Sammanfattning : Nuclear energy is a carbon-free energy source often considered less harmful to the environment than fossil fuels. However, accidents have shown that there are some safety concerns regarding nuclear energy that need to be continuously assessed and further improved. LÄS MER

4. 13. Development of an Environment-Accident Index : A planning tool to protect the environment in case of a chemical spill

   Författare :Åsa Scott Andersson; Mats Tysklind; Ingrid Fängmark; Olof Stjernström; Stellan Fisher; Per Leffler; Ronald Wennersten; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Environmental chemistry; Environment-Accident Index; Chemical Accidents; environmental effects; questionnaire; expert judgements; statistical multivariate design; PCA; PLS; Miljökemi; Environmental chemistry; Miljökemi;

   Sammanfattning : The increasing mass and complexity of chemicals being produced and transported has resulted in more rigorous demands on both authorities as well as chemical-handling industries to assess the risks involved. The Environment-Accident Index (EAI), has been proposed as a planning tool created as an equation in which chemical properties (variables describing the chemical involved) are combined with site-specific properties (variables describing the accident site). LÄS MER

5. 14. Stability of Alternative Nuclear Fuel Materials in Aqueous Systems

   Författare :Sawsan El Jamal; Mats Jonsson; Mats Johnsson; Claire Corkhill; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; UC; UN; UO2; gamma radiolysis; oxidative dissolution; H2O2; studtite; additive; UC; UN; UO2; gammaradiolys; oxidativ upplösning; H2O2; studtite; additiv; Kemi; Chemistry;

   Sammanfattning : Nuclear power produces a large portion of the electricity worldwide. It has been the largest low-carbon energy source for more than 30 years and has played an essential role in the security of energy supplies for many countries. LÄS MER

7. 15. Experimental Study on Steam Explosions in Chemical Solutions and Seawater

   Författare :Yucheng Deng; Weimin Ma; Sevostian Bechta; Andrei Komlev; Renaud Meignen; KTH; []
   Nyckelord :Severe accident; fuel coolant interactions; steam explosion; chemical additives; seawater; Svåra haverier; bränsle-kylmedelsinteraktioner; ångexplosion; kemiska tillsatser; havsvatten; Kärnenergiteknik; Nuclear Engineering;

   Sammanfattning : Steam explosions may be encountered in severe accidents of light water reactors (LWRs), which are thermal detonations caused by rapid and intense vaporization of the coolant upon its direct contact with the core melt (corium). Motivated by the interest in understanding and mitigation of severe accident progression, many studies have been conducted to investigate the steam explosion phenomena during severe accidents. LÄS MER