TY - GEN
T1 - Insulation performance of safety-related cables for nuclear power plants under simulated severe accident conditions
AU - Minakawa, Takefumi
AU - Ikeda, Masaaki
AU - Hirai, Naoshi
AU - Ohki, Yoshimichi
N1 - Publisher Copyright:
© 2017 Institute of Electrical Engineers of Japan. All rights reserved.
PY - 2017/12/4
Y1 - 2017/12/4
N2 - To examine electrical insulation behavior of cables under severe accident environmental conditions, safety-related low voltage cables used as severe accident management equipment were subjected to two tests that simulated two environments: 1) at 155 oC, which is the simulated highest assumed temperature when proper accident management measures are taken, 2) at 200 oC, which is the maximum durable temperature of a primary containment vessel. In addition, electrical insulation resistance was measured for the cables during steam exposure in the two tests. As a result, all the cables passed the acceptance criteria of the tests. The minimum volume resistivity of the cables during the test at 155 oC was around 108 Ωm, confirming that the cables have a sufficient insulation performance. On the other hand, the minimum volume resistivity during the severer test at 200 oC was around 105 Ωm due to the increase in leak current.
AB - To examine electrical insulation behavior of cables under severe accident environmental conditions, safety-related low voltage cables used as severe accident management equipment were subjected to two tests that simulated two environments: 1) at 155 oC, which is the simulated highest assumed temperature when proper accident management measures are taken, 2) at 200 oC, which is the maximum durable temperature of a primary containment vessel. In addition, electrical insulation resistance was measured for the cables during steam exposure in the two tests. As a result, all the cables passed the acceptance criteria of the tests. The minimum volume resistivity of the cables during the test at 155 oC was around 108 Ωm, confirming that the cables have a sufficient insulation performance. On the other hand, the minimum volume resistivity during the severer test at 200 oC was around 105 Ωm due to the increase in leak current.
KW - Electrical volume resistivity
KW - Ethylene propylene diene rubber
KW - Nuclear power plant
KW - Severe accident
KW - Silicone rubber
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U2 - 10.23919/ISEIM.2017.8166590
DO - 10.23919/ISEIM.2017.8166590
M3 - Conference contribution
AN - SCOPUS:85041901974
T3 - Proceedings of the International Symposium on Electrical Insulating Materials
SP - 716
EP - 719
BT - Proceedings of 2017 International Symposium on Electrical Insulating Materials, ISEIM 2017
PB - Institute of Electrical Engineers of Japan
T2 - 2017 International Symposium on Electrical Insulating Materials, ISEIM 2017
Y2 - 11 September 2017 through 15 September 2017
ER -