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Master's Dissertation
DOI
https://doi.org/10.11606/D.85.2021.tde-03122021-173337
Document
Author
Full name
Fabio Gurian Castanho
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2021
Supervisor
Committee
Costa, Osvaldo Luiz da (President)
Pompeia, Pedro José
Soares, David Mendez
Title in Portuguese
Projeto e desenvolvimento de um dispositivo para abertura de cápsulas de alumínio irradiadas no reator IEA-R1 do IPEN
Keywords in Portuguese
abridor de cápsulas
cápsula irradiada
coelho
dispositivo de abertura
Abstract in Portuguese
Este trabalho propõe um novo dispositivo para abertura de cápsulas de alumínio irradiadas em reator nuclear, implementando melhorias ao procedimento de abertura, com foco na segurança do operador. As principais deficiências identificadas no dispositivo de abertura atual são: a) os detritos radioativos gerados pelo corte contaminam o ambiente de operação; b) o movimento de rotação da cápsula durante a abertura pode causar danos ao material alvo e ao seu invólucro, levando à liberação de materiais radioativos. O novo dispositivo de abertura foi projetado com as seguintes características: a) facilidade na inserção e remoção das cápsulas por meio de telemanipuladores; b) o tipo de corte foi modificado de abrasivo para lâmina tipo disco de corte, reduzindo a geração de pequenos detritos radioativos; c) a rotação da cápsula foi substituída por um movimento na cabeça de corte, mantendo a cápsula fixa; d) aperfeiçoamento de controle, precisão do processo e, parada de emergência, por meio de sistemas melhorados de operação do dispositivo, com comando remoto em painel de controle. Os testes comparativos mostraram que o sistema atual produz em média 0,3(2) mg de detritos por corte, enquanto o sistema proposto de lâmina tipo disco de corte apresentou uma redução de mais de 99 % na geração de detritos. Além disso, a imobilização da cápsula durante a abertura evita danos aos materiais alvo radioativos.
Title in English
Design and development of a device for the opening of irradiated aluminum capsules in the IPEN IEA-R1 nuclear reactor
Keywords in English
capsule opener
irradiated capsule
opening device
rabbit
Abstract in English
This work proposes a new device for opening irradiated aluminum capsules, with the implement of a better opening procedure, focusing on operator safety. The main deficiencies which were identified about the current opening procedure are: a) the radioactive debris generated by the cutting contaminate the environment of manipulation; b) the rotation movement of the capsule during opening may cause damage to the target material and its casing, leading to the release of radioactive target materials. The new opening device was designed with: a) easy insertion and removal of the capsules being done by telemanipulators; b) the type of cutting modified from abrasive to cutting wheel blade, allowing minimal generation of small size radioactive debris; c) the rotation of the capsule being replaced by a movement in the cutting head, keeping the capsule still; d) greater control, process accuracy and emergency stop, through improved remote operating system. Comparative tests showed that the current system produces average 0.3(2) mg of debris per cut, while the proposed system of cutting wheel blade presented a reduction of more than 99 % in the generation of debris. In addition, the immobilization of the capsule during the opening prevents damage to the radioactive target materials.
 
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Publishing Date
2021-12-13
 
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