Abstract: As the lessons learned by the Fukushima Daiichi NPPs accident, Chubu Electric Power carried out the Emergency Safety Measures at Hamaoka NPPs immediately, and announced the plan for tsunami countermeasures including the construction of 18m-height tsunami protection wall in July 2011. Furthermore, the company announced the additional severe accident and tsunami countermeasures, and etc. in December 2012 and in April 2013, such as the installation of Filtered Containment Venting System and incr...
英字タイトル:
Safety upgrading activities against Tsunami, Earthquake, and Severe Accident at Hamaoka NPPs

As the lessons learned from the Fukushima Daiichi NPP accident, we will implement installing the sea wall in order to block direct intrusion of tsunami on Hamaoka Nuclear Power Station. In addition, assuming a tsunami higher than the sea wall, we will implement countermeasures to prevent flooding inside the building and the important equipment containment room. In this paper, we present countermeasures to prevent flooding for penetrations and openings of ventilation. ...
英字タイトル:
Prevention measures of flooding inside building at Hamaoka NPS

In order to verify the operational reliability of automatic closure system(hereinafter referred to as “flap gates“) used at air conditioning openings of buildings as a measure to protect Hamaoka Nuclear Power Station against tsunami, operational tests on actual size equipment has been conducted. Tests showed reliable operation in response to repeated rises in the water level. Tests also showed normal operation of flap gates in the case of waves containing debris and sediment. ...
英字タイトル:
Use of flap gates at building openings of Hamaoka Nuclear Power Station