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Title: Study of Degradation Processes in Dielectric Materials Used in Electronic Control Equipment Operated in 'Kozloduy' NPP

Abstract

The electronic equipment for control of different systems of Units 5 and 6 is studied for presence of degradation processes occurring in result of continuous usage in conditions of controlled radiation background in compliance with 'Kozloduy' NPP safety codes. Systems, operated in a continuous mode in the course of about 10 years were chosen - separate units containing different dielectric materials (varnish coating, circuit board bases, cable insulations, electro protective elements, etc.) were extrapolated. Series of test samples were prepared which were connected with flat or coaxial condensers and their characteristic parameters were measured: tg{delta}, {epsilon}, low voltage conductivity and leak currents at voltages that exceed the working ones several times. When comparing the obtained data with the reference ones, a conclusion is made about the effectiveness of electric ageing during operation in the course of time.

Authors:
 [1];  [2]
  1. 'Kozloduy' NPP, Kozloduy (Bulgaria)
  2. Department of Semiconductor Physics, Faculty of Physics, University of Sofia 'St. Kliment Ohridski', 5 J. Bourchier Blvd., 1164 Sofia (Bulgaria)
Publication Date:
OSTI Identifier:
21057145
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 899; Journal Issue: 1; Conference: 6. international conference of the Balkan Physical Union, Istanbul (Turkey), 22-26 Aug 2006; Other Information: DOI: 10.1063/1.2733143; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; AGING; CONTROL EQUIPMENT; DIELECTRIC MATERIALS; ELECTRIC CONDUCTIVITY; ELECTRONIC EQUIPMENT; KOZLODUY-1 REACTOR; LEAKAGE CURRENT; NUCLEAR POWER PLANTS; PERMITTIVITY; REACTOR OPERATION; REACTOR SAFETY; RELAXATION LOSSES

Citation Formats

Naydenov, Nayden, and Popov, Angel. Study of Degradation Processes in Dielectric Materials Used in Electronic Control Equipment Operated in 'Kozloduy' NPP. United States: N. p., 2007. Web. doi:10.1063/1.2733143.
Naydenov, Nayden, & Popov, Angel. Study of Degradation Processes in Dielectric Materials Used in Electronic Control Equipment Operated in 'Kozloduy' NPP. United States. doi:10.1063/1.2733143.
Naydenov, Nayden, and Popov, Angel. Mon . "Study of Degradation Processes in Dielectric Materials Used in Electronic Control Equipment Operated in 'Kozloduy' NPP". United States. doi:10.1063/1.2733143.
@article{osti_21057145,
title = {Study of Degradation Processes in Dielectric Materials Used in Electronic Control Equipment Operated in 'Kozloduy' NPP},
author = {Naydenov, Nayden and Popov, Angel},
abstractNote = {The electronic equipment for control of different systems of Units 5 and 6 is studied for presence of degradation processes occurring in result of continuous usage in conditions of controlled radiation background in compliance with 'Kozloduy' NPP safety codes. Systems, operated in a continuous mode in the course of about 10 years were chosen - separate units containing different dielectric materials (varnish coating, circuit board bases, cable insulations, electro protective elements, etc.) were extrapolated. Series of test samples were prepared which were connected with flat or coaxial condensers and their characteristic parameters were measured: tg{delta}, {epsilon}, low voltage conductivity and leak currents at voltages that exceed the working ones several times. When comparing the obtained data with the reference ones, a conclusion is made about the effectiveness of electric ageing during operation in the course of time.},
doi = {10.1063/1.2733143},
journal = {AIP Conference Proceedings},
number = 1,
volume = 899,
place = {United States},
year = {Mon Apr 23 00:00:00 EDT 2007},
month = {Mon Apr 23 00:00:00 EDT 2007}
}