Study of the boron homogenizing process employing an experimental low-pressure bench simulating the IRIS reactor pressurizer – Part I

Annals of Nuclear Energy, Volume 53,  2013, Pages 254-258.
Jair de Lima Bezerra, Carlos Alberto Brayner de Oliveira Lira, Antonio Carlos de Oliveira Barroso, Fernando Roberto de Andrade Lima, Mário Augusto Bezerra da Silva.Departamento de Energia Nuclear, Centro de Tecnologia e Geociências, Universidade Federal de Pernambuco, Av. Prof. Luiz Freire, 1000, 50740-540 Recife – PE, Brazil and

Centro Regional de Ciências Nucleares do Nordeste, Comissão Nacional de Energia Nuclear, Av. Prof. Luiz Freire, 200, 50740-540 Recife – PE, Brazil and

Instituto de Pesquisas Energéticas e Nucleares, Comissão Nacional de Energia Nuclear, Av. Prof. Lineu Prestes, 2242 Cidade Universitária, 05508-900 São Paulo, Brazil




The reactivity control of a nuclear reactor to pressurized water is made by means of controlling bars or by boron dilution in the water from the coolant of a primary circuit. The control with boron dilution has great importance, despite inserting small variations in the reactivity in the reactor, as it does not significantly affect the distribution of the neutron flux. A simplified experimental bench with a test section manufactured in transparent acrylic, was built in reduced scale as to be used in a boron homogenizing process, simulating an IRIS reactor pressurizer (International Reactor Innovative and Secure). The bench was assembled in the Centro Regional de Ciências Nucleares do Nordeste (CRCN-NE), an entity linked to the Comissão Nacional de Energia Nuclear (CNEN), Recife – PE.


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