CONSIDERATIONS FOR THE DEVELOPMENT OF A DEVICE FOR THE DECOMMISSIONING OF THE HORIZONTAL FUEL CHANNELS IN THE CANDU 6 NUCLEAR REACTOR. PART 10 - PRESENTATION OF THE DECOMMISSIONING DEVICE OPERATING

• Main Authors: Constantin D. STANESCU, Gabi ROSCA FARTAT, Constantin POPESCU
• Format: Article
• Language: English
• Published: Academica Brancusi 2015-05-01
• Series: Fiabilitate şi Durabilitate
• Subjects: Candu reactor; fuel channel; decommissioning device; dismantling; operator panel; cutting; extraction
• Online Access: http://www.utgjiu.ro/rev_mec/mecanica/pdf/2015-01/28_Constantin%20D.%20STANESCU,%20Gabi%20ROSCA%20FARTAT,%20Constantin%20POPESCU%20-%20CONSIDERATIONS%20FOR%20THE%20DEVELOPMENT%20OF%20A%20DEVICE%20FOR%20THE%20DECOMMISSIONING%20OF%20THE%20HORIZONTAL%20FUEL%20CHANNELS%20IN%20THE%20CANDU%206%20NUCLEAR%20REACTOR.%20PART%2010.pdf

This paper presents a solution proposed by the authors in order to achieve of a cutting and extracting device operating panel for the decommissioning of the horizontal fuel channels in the CANDU 6 nuclear reactor. The Cutting and Extraction Device (CED) is fully automated, connected by wires to a Programmable Logic Controller (PLC) and controlled from a Human Machine Interface (HMI). The Cutting and Extraction Device (CED) performs the dismantling, cutting and extraction of the fuel channel components, moving with variable speed, temperature monitoring and video surveillance inside the pipe, unblock and extract the channel closure plug (from End Fitting - EF), unblock and extract the channel shield plug (from Lattice Tube - LT), block and cut the middle of the pressure tube, block and cut the end of the pressure tube, block and extract the half of pressure tube. All operations can be monitored and controlled from a operating panel. The PLC fully command the device in automatic or manually mode, to control the internal sensors, transducers, electrical motors, video surveillance and pyrometers for monitoring cutting place temperature. The device controller has direct access to the measured values with these sensors, interprets and processes them, preparing the next actionafter confirming the action in progress. The design of the Cutting and Extraction Device (CED) shall be achieved according to the particular features of the fuel channel components to be dismantled and to ensure radiation protection of workers.