In order to improve 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 NPP against tsunami, outdoor exposure test of actual equipment and components , And grasped the deterioration tendency. By making use of the exposure test results in maintenance, we were able to set up a reasonable and appropriate maintenance cycle and to enhance the safety of the Hamaoka NPP. ...
英字タイトル:
Degradation characteristics of flap gate under outdoor environment

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