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Author Sandri, S. ♦ Coniglio, A. ♦ D'Arienzo, M.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2005
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations
Subject Keyword Coolants ♦ Corrosion ♦ Radiation safety ♦ Plasma confinement ♦ Heat pumps ♦ Heat sinks ♦ Protection ♦ Dusty plasma ♦ Aerosols ♦ Personnel ♦ incidents recovery ♦ radiation protection ♦ nuclear fusion ♦ ITER
Abstract Two incidents among those defined for the ITER systems are analysed from the radiological safety point of view due to their major impact on the worker safety: (1) "In-vessel FW pipe break": (2) "heat exchanger leakage". For both incidents no direct personnel exposure is envisaged during the events. Nevertheless, the maintenance activities needed to restore the systems to their original performance are responsible of an increase of the individual dose and of the occupational radiation exposure (ORE). Maintenance scenarios are described for both the after-incidents situations and the related timing and person power are estimated and discussed. Dose rates related to the FW module operations are derived from previous analyses. Original new assessment of the dose rate in the operator position are performed in the current study to evaluate the impact of heat exchanger (HX) tube plugging. The radiological source term for the scenario is the activated corrosion product (ACP) already assessed for previous analysis. The evaluation of the inner surface concentration of ACP is based on the model prepared for the code PACTITER used to assess the source term. Computer models for dose rate assessment are presented. Collective doses for the repair activities following the two incidents are quantified for the maintenance activities to recover both the "in-vessel FW pipe break" and the "heat exchanger leakage"
Description Author affiliation: ENEA ION-IRP, Rome (Sandri, S.; Coniglio, A.)
ISBN 0424401596
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2005-09-26
Publisher Place USA
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 4.66 MB
Page Count 4
Starting Page 1
Ending Page 4

Source: IEEE Xplore Digital Library