Thermal-Hydraulic Experiments on the Tall LBE Test Facility
2004 (English)In: Utilisation and Reliability of High Power Proton Accelerators Workshop Proceedings, Daejeon, Republic of Korea, 16-19 May 2004, 2004, 465-476 p.Conference paper (Refereed)
Royal Institute of Technology (KTH) is participating in two specific research projects of the EURATOM Fifth Framework Programme, one named as TECLA and the other as PDS-XADS, both on Accelerator-driven Transmutation of Waste (ATW) using lead-bismuth eutectic (LBE) as spallation target as well as coolant in a subcritical reactor which is driven by an accelerator.According to the work-package profiles of TECLA and PDS-XADS, the Thermal-hydraulic ADS Lead-bismuth Loop (TALL) was designed and erected at KTH to investigate the heat transfer performance of different heat exchangers, and the thermal-hydraulic characteristics of natural circulation and forced circulation flow under steady and transient conditions.The specifications of TALL are chosen to simulate prototypic thermal hydraulic conditions of an ADS reactor, with well-conditioned flow and controllable power for thermal-hydraulic tests. The facility is 6.8m tall and the placement of heaters and heat exchangers allows natural convection flows as should occur in the prototypic vessel. The LBE loop is of full height and has been scaled for prototypic (power/volume) ratio to represent all the components whose LBE volume, pressure drops, flow velocity and heating rates correspond to one tube of the heat exchanger design chosen. The loop is re-configurable for thermal-hydraulic experiments with steady and transient conditions. Sections of the loop allow for easy replacement.The facility has come into operation sine September 2003, and investigations on LBE flow and heat transfer characteristics have been carried out for straight-tube heat exchanger and U-tube heat exchanger, respectively.Transient experiments with the test facility will be investigated with reference to safety issues of ADS. While simulating decay heat in the core tank, the temperature and flowrate transient characteristics are measured during the following conditions,a) loss of heat sink (switch off the pump of the secondary loop);b) loss of external driving head (switch off the pump of the primary loop)--- completely passive mode of LBE loop operation;c) switch on and off the heater to simulate accelerator trips;d) blockage in pipes; ande) Sudden increase in power.The above experiments will provide valuable data for the safety evaluations of ADS design since the data can be employed for validation of safety analysis codes particular to an LBE-cooled reactor.
Place, publisher, year, edition, pages
2004. 465-476 p.
IdentifiersURN: urn:nbn:se:kth:diva-59527DOI: 10.1787/9789264013810-enISBN: 9789264013810ISBN: 9789264013803OAI: oai:DiVA.org:kth-59527DiVA: diva2:475630
OECD/NEA 4th International Workshop on the Utilisation and Reliability of High Power Proton Accelerator, Daejeon, Republic of Korea, 16-19 May 2004
QC 201201122012-01-112012-01-112012-01-12Bibliographically approved