Tuesday, November 11, 2014

11.14 BERKELEY, CA: Safety Countermeasure of Onagawa NPS after the Great East-Japan Earthquake, and the current situation of nuclear power in Japan



Colloquium: Center for Japanese Studies | November 14 | 10 a.m. | 180 Doe Library

Akiyoshi Obonai, Chief Nuclear Reactor Engineer and Chief Electrical Engineer, Tohuko Electric Power Company

On, March 11, a massive earthquake occurred at 2:46 p.m. Japan standard time, and the epicenter was about 130km off the Pacific Ocean from the Oshika peninsula where Onagawa NPS is located.

This talk will first address what happened at Onagawa Nuclear Power Station (NPS), and how the plant was managed in order to reach a cold shut down.

Next Obonai will go over the safety countermeasure after 3/11, learning the lesson from Onagawa and Fukushima. He conducted the detailed evaluation of 3/11/11 earthquakes and tsunamis. Based on this evaluation, further seismic reinforcement has been conducted and a high levee (about 29m above sea level) was constructed. In addition, safety upgrades were made for severe accidents, i.e. Filtered Containment Vessel System, and alternative decay heat removable system.

Finally, Obonai will talk about the current situation of nuclear power in Japan. For example, government policy, people’s attitude toward nuclear power, and the circumstance for restarting nuclear power station.

Akiyoshi Obonai received his masters in Nuclear Engineering from the University of California, Berkeley in 1994. He currently works for the Tohuko Electric Power Company in reactor operation, reactor safety analysis and nuclear fuel management. He is certified by the Japanese government as a Chief Nuclear Reactor Engineer and Chief Electrical Engineer

cjs-events@berkeley.edu, 510-642-3415



Institute of East Asian Studies Calendar: Safety Countermeasure of Onagawa NPS after the Great East-Japan Earthquake, and the current situation of nuclear power in Japan


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