Neutronic and Safety Aspects of a Gas-Cooled Subcritical Core for Minor Actinide Transmutation
2005 (English)In: Nuclear Technology, ISSN 0029-5450, Vol. 154, no 1, 41-51 p.Article in journal (Refereed) Published
We have designed a gas-cooled accelerator-driven system dedicated to transmutation of minor actinides. Thanks to the excellent neutron economy of the uranium-free fuel employed, the pin pitch to diameter ratio (P/D) could be increased to 1.8. The increased coolant fraction allows for decay heat removal at ambient pressure. The large coolant fraction further results in a low, pressure loss-26 kPa over the core, 35 kPa in. total. Thanks to the large P/D, the elevation of the heat exchanger necessary to remove decay heat by natural circulation is just more than I m. The absence of uranium in conjunction. with the presence of 35% (heavy atom) americium in the fuel results in a low effective delayed neutron fraction and a vanishing Doppler feedback, making subcritical operation mandatory.
Place, publisher, year, edition, pages
2005. Vol. 154, no 1, 41-51 p.
Accelerator-driven systems; Helium cooling; Minor actinide fuel; Actinides; Cooling; Heat exchangers; Monte Carlo methods; Nuclear reactors; Plutonium; Uranium; Actinide transmutation; Doppler feedback; Gas-cooled accelerator-driven system; Nuclear fuels
Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:kth:diva-6790ISI: 000236616200003ScopusID: 2-s2.0-33645918000OAI: oai:DiVA.org:kth-6790DiVA: diva2:11600
QC 201411272007-02-192007-02-192014-11-27Bibliographically approved