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

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)