Abstract
Several cables in safety-related systems in nuclear power plants are required to maintain their intended electrical insulating function while they are exposed to harsh environmental conditions in the primary containment vessel during assumed accidents. This must be satisfied even after the cables are operated for their full service period. For such cables, the behavior of their insulation under accidents is a matter of concern. In this research, after silicone rubber insulated cables were pre-aged by simultaneous thermal and radiation exposure, they were irradiated or exposed to high temperature steam to simulate the environmental conditions during the accident, or subjected to the combination of these conditions. The resultant changes in various properties were analyzed by instrumental analyses. As a result, it has been confirmed that the pre-aging and radiation exposure induce cross-linking and depolymerization of siloxane chains to produce cyclic siloxanes, whereas the steam exposure causes significant depolymerization and the generation of low-molecular cyclic siloxanes.
| Original language | English |
|---|---|
| Title of host publication | 2018 IEEE CEIDP Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2018 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 602-605 |
| Number of pages | 4 |
| Volume | 2018-October |
| ISBN (Electronic) | 9781538661925 |
| DOIs | |
| Publication status | Published - 2018 Nov 26 |
| Event | 2018 IEEE CEIDP Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2018 - Cancun, Mexico Duration: 2018 Oct 21 → 2018 Oct 24 |
Other
| Other | 2018 IEEE CEIDP Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2018 |
|---|---|
| Country | Mexico |
| City | Cancun |
| Period | 18/10/21 → 18/10/24 |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering
Cite this
Aging State Analysis of Safety-related Cables for Nuclear Power Plants Exposed to Simulated Accident Conditions. / Minakawa, Takefumi; Ikeda, Masaaki; Hirai, Naoshi; Ohki, Yoshimichi.
2018 IEEE CEIDP Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2018. Vol. 2018-October Institute of Electrical and Electronics Engineers Inc., 2018. p. 602-605 8544872.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Aging State Analysis of Safety-related Cables for Nuclear Power Plants Exposed to Simulated Accident Conditions
AU - Minakawa, Takefumi
AU - Ikeda, Masaaki
AU - Hirai, Naoshi
AU - Ohki, Yoshimichi
PY - 2018/11/26
Y1 - 2018/11/26
N2 - Several cables in safety-related systems in nuclear power plants are required to maintain their intended electrical insulating function while they are exposed to harsh environmental conditions in the primary containment vessel during assumed accidents. This must be satisfied even after the cables are operated for their full service period. For such cables, the behavior of their insulation under accidents is a matter of concern. In this research, after silicone rubber insulated cables were pre-aged by simultaneous thermal and radiation exposure, they were irradiated or exposed to high temperature steam to simulate the environmental conditions during the accident, or subjected to the combination of these conditions. The resultant changes in various properties were analyzed by instrumental analyses. As a result, it has been confirmed that the pre-aging and radiation exposure induce cross-linking and depolymerization of siloxane chains to produce cyclic siloxanes, whereas the steam exposure causes significant depolymerization and the generation of low-molecular cyclic siloxanes.
AB - Several cables in safety-related systems in nuclear power plants are required to maintain their intended electrical insulating function while they are exposed to harsh environmental conditions in the primary containment vessel during assumed accidents. This must be satisfied even after the cables are operated for their full service period. For such cables, the behavior of their insulation under accidents is a matter of concern. In this research, after silicone rubber insulated cables were pre-aged by simultaneous thermal and radiation exposure, they were irradiated or exposed to high temperature steam to simulate the environmental conditions during the accident, or subjected to the combination of these conditions. The resultant changes in various properties were analyzed by instrumental analyses. As a result, it has been confirmed that the pre-aging and radiation exposure induce cross-linking and depolymerization of siloxane chains to produce cyclic siloxanes, whereas the steam exposure causes significant depolymerization and the generation of low-molecular cyclic siloxanes.
UR - http://www.scopus.com/inward/record.url?scp=85059744505&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85059744505&partnerID=8YFLogxK
U2 - 10.1109/CEIDP.2018.8544872
DO - 10.1109/CEIDP.2018.8544872
M3 - Conference contribution
AN - SCOPUS:85059744505
VL - 2018-October
SP - 602
EP - 605
BT - 2018 IEEE CEIDP Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2018
PB - Institute of Electrical and Electronics Engineers Inc.
ER -