Nuclear Plant Updates as of March 27, 2011

Conditions of Fukushima Dai‐ichi Nuclear Power Station Unit 1-6 as of March 27

Unit 1 – Lighting was restored to control room on March 24. Water temperature in spent fuel pool is unknown. Water temperature in reactor is unknown. Fresh water is being injected into the core.

Unit 2 – Li…ghting was restored to control room on March 26. Water temperature in spent fuel pool is 70C. Water temperature in reactor is unknown. Seawater is being injected into the spent fuel pool and fresh water is being injected into the core.

Unit 3 – Lighting was restored to control room on March 22. Water temperature in pool is unknown. Water temperature in reactor is unknown. Seawater is being injected into the spent fuel pool and fresh water is being injected into the core.

Unit 4 – Water temperature in spent fuel pool is unknown. No fuel is in the reactor pressure vessel. Seawater is being injected into the spent fuel pool.

Unit 5 – In cold shutdown since March 20. External power restored on March 21. Cooling started on March 24. Water temperature in pool is 34.6C. Water temperature in reactor is 43.2C.

Unit 6 – In cold shutdown since March 20. External power restored on March 22. Water temperature in pool is 20.5C. Water temperature in reactor is 49.4C.

Source: http://www.nisa.meti.go.jp/english/files/en20110327-1-2.pdf

You can get regular updates on the NISA website: http://www.nisa.meti.go.jp/english/index.html


Verdict: This is the state of the reactors as reported by the Nuclear and Industrial Safety Agency (NISA) of Japan. This is the organization that has been reporting on the reactors since the quake. I believe that their data should be the most reliable, but perhaps others would disagree?

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