Table summary of reactor unit status at 15-april-1200 utc
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The document reports on the status of 6 nuclear power plant units in the aftermath of an earthquake. Unit 1 experienced damaged core and fuel integrity with a high but stable reactor pressure vessel temperature. Fresh water was being injected into the reactor pressure vessel and spent fuel pool via mobile pumps. Unit 2 had severe core damage and an increasing reactor pressure vessel temperature but fresh water injection was restoring cooling. Units 3 and 4 had damaged cores but stable reactor conditions and were receiving fresh water injection to cooling systems. Units 5 and 6 were in cold shutdown during maintenance and remained stable using off-site power.
Table summary of reactor unit status at 15-april-1200 utc
- 1. 04/15/2011 15:00 UTC Unit 1 2 3 4 Power (MWe /MWth) 460/1380 784/2381 784/2381 784/2381 Type of Reactor BWR-3 BWR-4 BWR-4 BWR-4 Status at time of EQ In service – auto shutdown In service – auto shutdown In service – auto shutdown Outage Core and fuel integrity Damaged Severe damage Damaged No fuel in the Reactor RPV & RCS integrity RPV temperature high but stable RPV temperature stable RPV temperature stable Not applicable due to outage plant status Containment integrity No information Damage suspected Damage suspected AC Power AC power available - power to instrumentation – Lighting to Central Control Room AC power available – power to instrumentation – Lighting to Central Control Room AC power available – power to instrumentation – Lighting to Central Control Room AC power available – power to instrumentation – Lighting to Central Control Room Building Severe damage Slight damage Severe damage Severe damage Water level of RPV Around half of Fuel is uncovered Around half of Fuel is uncovered Around half of Fuel is uncovered Not applicable due to outage plant status Pressure of RPV Increasing Stable Stable CV Pressure Drywell Increasing Stable Stable Water injection to RPV Injection of freshwater – via mobile electric pump with off-site power Injection of freshwater – via mobile electric pump with off-site power Injection of freshwater – via mobile electric pump with off-site power Water injection to CV No information No information No information Spent Fuel Pool Status Fresh water injection by concrete pump truck Freshwater injection to the Fuel Pool Cooling Line Freshwater injection via Fuel Pool Cooling Line and Periodic spraying Fresh water injection by concrete pump truck
- 2. 04/14/2011 11:00 UTC Unit 5 6 Power 784/2381 1100/3293 Type of Reactor BWR-4 BWR-5 Status at the EQ occurred Outage Outage Core and Fuel Cold Shutdown Being maintained using off-site electrical power and existing plant equipment. Cold Shutdown Being maintained using off-site electrical power and existing plant equipment. RPV & RCS integrity Containment int. AC Power Building Water level of RPV Pressure of RPV Containment Pressure Water injection to RPV Water injection to CV Spent Fuel Pool Status Severe condition Concern No immediate concern