2017 EQ Technical Meeting @ Clear water beach Nov.8 th -10 th. 2017 EQ tests of electrical equipment used in Japanese NPP Nov.10 Th.2017 Yasutaka Eguchi Mitsubishi Heavy Industries, LTD 7IS-AZ-20170065 R0 2017 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved.
This presentation is based on the studies performed by The Cable Ageing Working Group in The Federation of Electric Power Companies of Japan, consisted by Japanese utilities and plant suppliers including; Hokkaido Electric Power Co., Inc. Tohoku Electric Power Co., Inc. Tokyo Electric Power Co., Inc. Chubu Electric Power Co., Inc. Hokuriku Electric Power Co., Inc. The Kansai Electric Power Co., Inc. The Chugoku Electric Power Co., Inc. Shikoku Electric Power Co., Inc. Kyushu Electric Power Co., Inc. The Japan Atomic Power Co., Inc. (JAPC) J-power/Electric Power Development Co., Inc. (EPDC) Toshiba Co., Hitachi-GE Nuclear Energy, Ltd, and Mitsubishi Heavy Industries, Co. Ltd. with Mitsubishi Electric Co. 2017 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 2
Contents 1. Purpose 2. EQ Tests 1. Cables 2. MOV actuators 3. Conclusions 2017 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 3
1. Purpose Assessment of Cable Aging for Nuclear Power Plant (ACA) done by JNES proposed suggestions to the Environmental Qualification (EQ) test method of cable in Japan. Thermal and Radiation simultaneous aging shall be considered Tentative value of the activation energy at temperature of actual plant shall be 62.8kJ/mol (15kcal/mol) JNES-RE-2013-2049 Guide for Ageing Evaluation of Cables for Nuclear Power Plants (called ACA guide ) has reflected the suggestions. NRA, Japanese regulatory body, required the EQ test of cable based on this guide. EQ tests of electrical equipment in accordance with ACA guide have been done by Japanese utilities and plant suppliers. 2017 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 4
2. EQ Tests Specimens 1 Cables 8 vendors, 21 types of cables 2 Electrical equipment MOV actuator, electrical penetration assembly, Transmitter, coaxial connector and etc. 2017 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 5
2.1 Cables Specimen Type: FR-CPHS Insulation material: EP rubber Conductor Number: 4 Conductor size: 3.5mm 2 Manufacturer: Hitachi Cable Co. Ltd. Used years: 15.5 years in NPP Test sequences a. Baseline functional test b. Simultaneous, thermal and radiation, aging test for normal condition c. Functional test d. DBE radiation exposure test e. DBE environment test f. Acceptance test, withstand voltage test 2017 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 6
2.1 Cables b. Simultaneous, thermal and radiation, aging test for normal condition Service condition 50 C -0.005Gy/h Service Life Aging test condition 40 years 120 C negligible 137 days 50 years 120 C *1 177 days 60 years 120 C *1 217 days 60 C -0.3Gy/h 16 years 120 C 16.5Gy/h 106 days 25 years 120 C 15.3Gy/h 178 days 30 years 120 C 15.0Gy/h 219 days *1: Radiation degradation is estimated, because radiation rate is low. 2017 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 7
2.1 Cables d. DBE* radiation exposure test Total dose: 1.5MGy Dose rate: under 10kGy/h e. DBE* environment test Heating steam (Note 2) Chemical spray Steam Steam 190 Temperature Pressure 4.22 kg/cm 2 G 150 4.22 kg/cm 2 G 123 123 Note 1:within 1 minute Note 2:H3BO3(2000~ 3000ppm) +NaOH(PH8.5~ 10) 2.46 kg/cm 2 G 1.22kg/cm 2 G Note1 300sec 3Hr Time 1 Day 15 Days * The DBE is inside containment condition at LOCA 2017 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 8
2.1 Cables f. Acceptance test, withstand voltage test Service condition 50 C -0.005Gy/h Service Life Withstand test AC1500V-1min. 40 years success 50 years success 60 years success 60 C -0.3Gy/h 16 years success 25 years success 30 years success The specimen withstand the tests that a qualified life is 60years on 50 C - 0.005Gy/h and is 30 years on 60 C - 0.3Gy/h. 2017 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 9
2.2 MOV actuator Specimen of MOV actuator Type: SMB-OOO Manufacturer: Nippon Gear Co. Ltd. Test sequences of MOV actuator a. Baseline functional test b. Simultaneous, thermal and radiation, aging test for normal condition c. Cycle aging test d. Pressure aging test e. Vibration test f. Functional test g. DBE radiation exposure test h. DBE environment test 2017 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 10
2.2 MOV actuator b. Simultaneous, thermal and radiation, aging test for normal condition Service condition 60 C -0.3Gy/h Life Aging test condition 40 years 100 C 120Gy/h 112 days c. Cycle aging test Open-close: 2000 times d. Pressure aging test 0.45MPa- 3min, 20 times e. Vibration test 0.75G, 5Hz to 100Hz to 5Hz at a rate of 2 octaves per minute 2017 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 11
2.2 MOV actuator g. DBE radiation exposure test Total dose: 1.5MGy Dose rate: under 10kGy/h h. DBE environment test Open-close: 20min, 5 and 10hour, 1, 3, 5, 6, 7, 10 and 15day (Note 2) Chemical spray Heating steam Steam Steam 190 Temperature Pressure 4.22 kg/cm 2 G 150 4.22 kg/cm 2 G 123 123 Note 1:within 1 minute Note 2:H 3BO3(2000~ 3000ppm) +NaOH(PH8.5~ 10) 2.46 kg/cm 2 G 1.22kg/cm 2 G Note1 300sec 3Hr Time 1 Day 15 Days The specimen withstand the test that a qualified life is 40years on 60 C - 0.3Gy/h. 2017 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 12
3. Conclusions EQ tests of electrical equipment based on the ACA guide have been done by Japanese utilities and plant suppliers. The Results of the EQ tests will be referred as the EQ tests satisfied the requirements of the ACA guide in Japan. 2017 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 13