Update to Information Sheet Regarding the Tohoku Earthquake
The Federation of Electric Power Companies of Japan (FEPC) Washington DC Office
As of 12:30PM (EST), March 19, 2011
- Radiation Levels
- At 10:30PM (JST) on March 19, radiation level outside main office building (approximately 1,640 feet from Unit 2 reactor building) of Fukushima Daiichi Nuclear Power Station: 2,854 micro Sv/hour.
- Measurement results of ambient dose rate around Fukushima Nuclear Power Station announced at 4:00PM and 7:00PM on March 19 are shown in the attached two PDF files respectively.
- For comparison, a human receives 2,400 micro Sv per year from natural radiation in the form of sunlight, radon, and other sources. One chest CT scan generates 6,900 micro Sv per scan.
- Fukushima Daiichi Unit 1 reactor
- At 4:50PM on March 19, pressure inside the reactor core: 0.205MPa.
- At 4:50PM on March 19, water level inside the reactor core: 1.75 meters below the top of the fuel rods.
- At 4:50PM on March 19, pressure inside the primary containment vessel: 0.18MPaabs.
- As of 9:00PM on March 19, the injection of seawater continues into the reactor core.
- Recovery work of power supply is to be scheduled.
- Fukushima Daiichi Unit 2 reactor
- At 9:05PM on March 18, access to the substation for reserve power supply from external transmission line was completed.
- As of 1:30PM on March 19, the work for laying the electric cable from the substation to the load site is being carried out.
- At 4:30PM on March 19, pressure inside the reactor core: -0.009MPa.
- At 4:30PM on March 19, water level inside the reactor core: 1.3 meters below the top of the fuel rods.
- At 4:30PM on March 19, pressure inside the primary containment vessel: 0.135MPaabs.
- As of 9:00PM on March 19, the injection of seawater continues into the reactor core.
- Activities for connecting the commercial electricity grid are underway.
- Fukushima Daiichi Unit 3 reactor
- At 0:30AM on March 19, Tokyo Fire Department began to shoot water aimed at the spent fuel pool, continuously until 01:10AM.
- At 5:25PM on March 19, pressure inside the reactor core: -0.050MPa.
- At 5:25PM on March 19, water level inside the reactor core: 1.85 meters below the top of the fuel rods.
- At 5:25PM on March 19, pressure inside the primary containment vessel: 0.210MPaabs.
- At 5:30PM on March 19, Tokyo Fire Department began to shoot water continuously aimed at the spent fuel pool.
- As of 9:00PM on March 19, the injection of seawater continues into the reactor core.
- As of 9:00PM on March 19, activities for recovering the external power supply are underway.
- Fukushima Daiichi Unit 4 reactor
- No official updates to the information in our March 19 update have been provided.
- As of 9:00PM on March 19, activities for recovering the external power supply are underway.
- Fukushima Daiichi Unit 5 reactor
- At 5:00AM on March 19, pump for Residual Heat Removal (RHR) started up and cooling of spent fuel storage pool has started.
- At 6:00AM on March 19, the temperature of the spent fuel pool was measured at 155.8 degrees Fahrenheit.
- At 9:15AM on March 19, making 3 holes in the roof of reactor building to prevent hydrogen from accumulating has been completed.
- At 6:00PM on March 19, the temperature of the spent fuel pool was measured at 118.6 degrees Fahrenheit.
- Fukushima Daiichi Unit 6 reactor
- At 4:22AM on March 19, the second unit of emergency diesel generator started up.
- At 5:11AM on March 19, Fuel Pool Cooling (FPC) pump started to circulate the water of spent fuel pool.
- At 6:00AM on March 19, the temperature of the spent fuel pool was measured at 151.7 degrees Fahrenheit.
- At 9:15AM on March 19, making 3 holes in the roof of reactor building to prevent hydrogen from accumulating has been completed.
- At 6:00PM on March 19, the temperature of the spent fuel pool was measured at 152.6 degrees Fahrenheit.
- Fukushima Daiichi Common Spent Fuel Pool
- At 11:19AM on March 18, the temperature of the spent fuel pool was measured at 131.0 degrees Fahrenheit.
Our official sources are:
- Office of The Prime Minister of Japan
- Nuclear and Industrial Safety Agency (NISA)
- Tokyo Electric Power Company (TEPCO) Press Releases
- Ministry of Education, Culture, Sports, Science and Technology (MEXT)
Do you know if the Tohoku grid was energized at the Fukushima Dai-ichi plant after the quake and before the explosions? It was up at Dai-ini on March 12th, I understand. If the grid was down, do you know what the problem was, or where the corrective work was performed?
ReplyDeleteguginom@yahoo