In order to investigate the process of Accident of Fukushima Nuclear Plants, an accident scenario of Fukushima Daiichi Nuclear Power Plant, Unit 1 is analyzed from the data open to the public. Phase equilibrium process model and adiabatic expansion model were introduced. Original data reported in the first stage of the accident were examind to clalify the behaviour of the isolation condensers (ICs) which are generally believed unfunctional after the arrival of Tsunami and station blackout. The original...
英字タイトル:
Behaviour of isolation condensers (ICs) in accident of Fukushima Daiichi Nuclear Power Plant, Unit 1, based on thermodynamic model (And yet, the IC was working after Tsunami arrival)

Inorder to clarify the process of Accident of Fukushima Nuclear Plants, an accident scenario of Fukushima Daiichi Nuclear Power Plant, Unit 3 is analyzed from the data open to the public. Phase equilibrium process model was introduced in which the vapor and water are at saturation point in the vessels. The present accident scenario assumes that the high pressure coolant injection system (HPCI) did not worked properly, but the steam in the reactor pressure vessel (RPV) leaked through the turbine of HPCI...
英字タイトル:
Behaviour of high pressure coolant injection system (HPCI) in accident of Fukushima Daiichi Nuclear Power Plant, Unit 3, based on thermodynamic model

An accident scenario of Fukushima Daiichi Nuclear Power Plant, Unit 1 is analyzed from the data open to the public. The author assumed that the isolation condensers were partially functional at the initial stage of the accident. The estimation describes that the rupture time of the pressure containment vessel was at 4:00 12/3/2011 and the rupture area was approximately 8 cm in equivalent diameter. The estimation shows that the rupture time of the reactor pressure vessel was at approximately 6:00 12/3...
英字タイトル:
Heat and Fluid Flow in Accident of Fukushima Daiichi Nuclear Power Plant, Unit 1- When the Isolation Condenser Was Working -

An accident scenario of Fukushima Daiichi Nuclear Power Plant, Unit 3 is analyzed from the data open to the public. The author assumed that the high pressure coolant injection system (HPCI) stopped before TEPCO stopped it manually, and the vapor in the reactor pressure vessel (RPV) is condensed in the condensate storage tank. The estimation describes that the rupture time of the reactor pressure vessel was at 8:55 13/3/2011. The estimation shows that the rupture time of the pressure containment vesse...
英字タイトル:
Heat and Fluid Flow in Accident of Fukushima Daiichi Nuclear Power Plant, Unit 3 - When the high pressure coolant injection system (HPCI) stopped -