SANTOS, A.NASCIMENTO, J.A.2014-11-172014-11-182015-04-022014-11-172014-11-182015-04-02SANTOS, A.; NASCIMENTO, J.A. An integral metallic-fueled and lead-cooler reactor concept for the 4th generator reactor. In: INTERNATIONAL CONFERENCE ON NUCLEAR DATA FOR SCIENCE AND TECHNOLOGY, Oct. 7-12, 2001, Tsukuba, Japan. <b>Proceedings...</b> p. 1081-1084. Disponível em: http://repositorio.ipen.br/handle/123456789/15649.http://repositorio.ipen.br/handle/123456789/15649An Integral Lead Reactor (ILR) concept is proposed for the 4th generation reactor to be used in the future. The ILR is loaded with metallic fuel and cooled by lead. It was evaluated in the 300-1500 MWe power range with the Japanese Fast Set 2 cross sections library. This set was tested against several fast benchmarks and the criticality uncertainty was found to be 0.51 %Ak. The reactor is started with U-Zr and changes to the U-TRU-Zr-RE fuel in a stepwise way. In the equilibrium cycle, the burnup reactivity is less than (3. for a core of the order of 300 MWe, pin diameter of 10.4 mm and a pin-pitch to diameter ratio of 1.308. The lead void rea ctivity is negative for reactor power less than 750 MWe. There is a need to improve the nuclear data for the major actinides.1081-1084openAccessliquid metal cooled reactorsleadfuelsburnupreactor coresequilibriumTexto completo de eventohttps://orcid.org/0000-0002-5989-5705