Search results for "TOKAMAK"
showing 4 items of 54 documents
Progress of the conceptual design of the European DEMO breeding blanket, tritium extraction and coolant purification systems
2020
Abstract In the frame of the EUROfusion consortium activities the Helium Cooled Pebble Bed (HCPB) and the Water Cooled Lithium Lead (WCLL) concepts are being developed as possible candidates to become driver Breeding Blanket (BB) for the EU DEMO, which aims at the tritium self-sufficiency and net electricity production. The two BB design options encompass water or helium as coolants and solid ceramic with beryllium/beryllides or PbLi as tritium breeder and neutron multipliers. The BB segments have evolved towards a more stable conceptual design taking into account multiple feasibility aspects and requirements imposed by interfacing systems. Possible solutions to improve shielding capabiliti…
Status of EU DEMO heat transport and power conversion systems
2018
Abstract DEMO in Europe is considered to be the nearest-term reactor design to follow ITER and capable of demonstrating production of electricity, operating with a closed fuel-cycle and to be a facilitating machine between ITER and a commercial reactor. The aim of this paper is to show the design progress of the complex system’s “chain” devoted to the extraction of the plasma generated pulsed thermal power and its conversion into electricity delivered to the grid, including the Primary Heat Transport System (PHTS), the Power Conversion System (PCS) and the Intermediate Heat Transport System (IHTS) – provided by an Energy Storage System (ESS) – in between PHTS and PCS, which is introduced fo…
Draining and drying process development of the Tokamak Cooling Water System of ITER
2016
Abstract The ITER Organization (IO) developed a thermal-hydraulic (TH) model of the complex first wall and blanket (FW/BLK) cooling channels to determine gas flow rate and pressure required to effectively blow out the water in the FW/BLK. In addition, US ITER conducted experiments for selected geometries of FW/BLK flow channels to predict the blowout parameters. The analysis indicates that as low as 2 MPa of pressure difference over the blanket modules will ensure substantial evacuation of the water in blankets with just a few percent remaining in the blanket flow channels. A limited validation study indicates that the analysis yields less conservative results to compare against data collec…
Ydinfuusion fysikaaliset perusteet energiantuotannossa ja fuusiolaitteiden kehitys
2016
Kahden atomin, joiden massaluku on alle 60, yhdistymistä yhdeksi atomiksi kutsutaan fuusioksi. Tämän ydinreaktion seurauksena vapautuu valtavasti energiaa ja sen valjastamista ihmiselle hyödyllisen muotoon on tutkittu yli 50 vuoden ajan. Keskeisin tavoite tälle pro gradu -tutkielmalle oli selvittää lämpöydinfuusion fysikaaliset perusteet, minkälaisia merkittäviä läpimurtoja fuusiotutkimuksessa on saavutettu ja toisaalta minkälaisia ratkaisemattomia ongelmia energiantuottoon kykenevän fuusiovoimalan edessä on. Edistysaskelien ja ratkaisemattomien ongelmien osalta keskitytään menestyksekkäimpään koelaitteeseen, tokamakiin. Tähän mennessä erilaisia koejärjestelmiä on ehdotettu useita, mutta to…