We show a new system named AZCATL-CRP to design full power control rod patterns in BWRs. Azcatl-CRP uses an ant colony system and a reactor core simulator for this purpose. Transition and equilibrium cycles of Laguna Verde Nuclear Power Plant (LVNPP) reactor core in Mexico were used to test Azcatl-CRP. LVNPP has 109 control rods grouped in four sequences and currently uses control cell core (CC...

The PUREX technology based on aqueous processes is currently the leading reprocessing technology in nuclear energy systems. It seems to be the most developed and established process for light water reactor fuel and the use of solid fuel. However, demand driven development of the nuclear system opens the way to liquid fuelled reactors, and disruptive technology development through the applicatio...

This paper summarizes a study of the implications of a technology-neutral regulation for advanced nuclear power plant designs and proposes a predominately rationalist approach to future nuclear plant regulations. The current body of regulations has been developed and evolved over the past 50 years with consideration of the knowledge and incidents experienced from operation of the Light Water Re...


 The IPR-R1 Triga research reactor, located at CDTN (Nuclear Technology Development Center) in Brazil, is one of the oldest reactors operation worldwide. Brazilian Nuclear Energy Commission (Cnen) has granted a Permit for Permanent Operation license reactor. This authorization includes some conditions to be settled within period up two years, that is, until end 2019, which not yet been ca...

15 The UASB process for wastewater treatment has been extensively studied, but the use of zeolite to improve 16 UASB reactor performance has rarely been explored. In this study, a UASB reactor modified with natural 17 zeolite operating at high nitrogen concentrations (0.5 g/L, 0.7 g/L and 1 g/L) was evaluated. Two laboratory 18 bioreactors, one with zeolite and one without, were operated at amb...

One of the oldest research reactors was launched over forty years ago. The WWR-M reactor started operating in December, 1959 at Petersburg Nuclear Physics Institute (PNPI) in Gatchina. Ever since it has been normally operating without replacement of the tank. Russia’s concern for this reactor as a stationary neutron source was significantly increased, when many research reactors were shut down ...

The performance of an EGSB (expanded granular sludge bed) reactor type using flocculent sludge was evaluated for the post-treatment of effluent from UASB reactor treating domestic sewage. A pilot-scale 157.5-L EGSB reactor was monitored during a 331-day period. The original concept of the EGSB reactor was based on the granular sludge use and by applying high upflow liquid velocities (vup). Howe...

Methyl tert-butyl ether ~MTBE! biodegradation was investigated using a continuously stirred tank reactor with biomass retention ~porous pot reactor! operated under aerobic conditions. MTBE was fed to the reactor at an influent concentration of 150 mg/L ~1.70 mM!. An identical reactor was operated as a killed control under the same conditions. Operation of these reactors demonstrated that remova...