User:FourTildes/Daichi status table

Legend
No immediate concern	Concern	Severe Condition

Status of Fukushima I at 22 August 06:00 JST	Unit 1	Unit 2	Unit 3	Unit 4	Unit 5	Unit 6
Connected to grid	1970/11/17	1973/12/24	1974/10/26	1978/02/24	1977/09/22	1979/05/04
Rated Electrical Power output (MWe)	460	784	784	784	784	1,100
Rated Thermal Power output (MWt)^[1]	1,380	2,381	2,381	2,381	2,381	3,293
Type of reactor	BWR-3	BWR-4	BWR-4	BWR-4	BWR-4	BWR-5
Containment type	Mark I	Mark I	Mark I	Mark I	Mark I	Mark II
Core fuel assemblies^[2]	400	548	548	0^[3]	548	764
Spent fuel assemblies^[3]	292	587	514	1,331	946	876
Spent fuel residual decay heat^[4]^[5]	60 kW	400 kW	200 kW	2,000 kW	700 kW	600 kW
Fuel type	Low-enriched uranium	Low-enriched uranium	Mixed-oxide (MOX) and low-enriched uranium	Low-enriched uranium	Low-enriched uranium	Low-enriched uranium
Status at earthquake	In service	In service	In service	Outage (scheduled)	Outage (scheduled)	Outage (scheduled)
Fuel integrity	Fully melted^[6]	Major damage,^[7] possibly fully melted^[8]	Major damage,^[7] possibly fully melted^[8]	Some spent fuel damaged^[9]	Not damaged	Not damaged
Reactor pressure vessel integrity	Damage and leakage suspected^[10]	Damage and leakage suspected^[7]	Damage and leakage suspected^[7]	Not damaged (defueled)	Not damaged	Not damaged
Containment integrity	Damage and leakage suspected^[10]	Damaged at torus	Damage and leakage suspected^[11]	Not damaged	Not damaged	Not damaged
Core cooling system 1 (ECCS/RHR)	Not functional	Not functional	Not functional	Not necessary (defueled)	Functional	Functional
Core cooling system 2 (RCIC/MUWC)	Not functional	Not functional	Not functional	Not necessary (defueled)	Functional (in cold shutdown)	Functional (in cold shutdown)
Building integrity	Severely damaged owing to hydrogen explosion	Slightly damaged, also panel removed to prevent hydrogen explosion	Severely damaged owing to hydrogen explosion	Severely damaged owing to hydrogen explosion	Panel removed to prevent hydrogen explosion	Panel removed to prevent hydrogen explosion
Pressure vessel, water level	Lower than the bottom of fuel	Fuel exposed partially or fully	Fuel exposed partially or fully	Safe (defueled)	Safe (in cold shutdown)	Safe (in cold shutdown)
Pressure vessel, pressure (Two instrument trains)	Stable at 0.016 MPa (gauge) (Train A) / (Train B not in service – suspected faulty) at 22 August 06:00 JST^[12]	Stable at 0.013 MPa (gauge) (Train A) / (Train B not in service) at 22 August 06:00 JST^[12]	Stable at −0.176 MPa (gauge) (Train A) / −0.104 MPa (gauge) (Train B) at 22 August 06:00 JST^[12]	Safe (defueled)	Safe (in cold shutdown)	Safe (in cold shutdown)
Pressure vessel, temperature (not direct measurements)	Decreased to 93.2 °C on 22 August^[12]	Decreased to 107.0 °C by 22 August^[12]	Decreased to 109.4 °C on 22 August^[12]	Safe (defueled)	Safe (in cold shutdown)	Safe (in cold shutdown)
Containment (Drywell) pressure	Stable at 0.1268 MPa (absolute) at 22 August 06:00 JST^[12]	Stable at 0.115 MPa (absolute) at 22 August 06:00 JST^[12]	Stable at 0.1015 MPa (absolute) on 22 August 06:00 JST^[12]	Safe	Safe	Safe
Water injection into core	Seawater injection started 12 March, with freshwater injection started 25 March and continuing^[13]	Seawater injection started 14 March, with freshwater injection started 26 March and continuing^[13]	Seawater injection started 13 March, with freshwater injection started 25 March and continuing^[13]	Not necessary (defueled)	Not necessary	Not necessary
Seawater injection into containment vessel	Not necessary	Not necessary	Not necessary	Not necessary	Not necessary	Not necessary
Containment venting	Temporarily stopped	Temporarily stopped	Temporarily stopped	Not necessary	Not necessary	Not necessary
INES (individual)	Level 5	Level 5	Level 5	Level 3	–	–
INES (combined)	Level 7^[14]^[15]
Evacuation radius	20 km from Nuclear Power Station (NPS), but 30 km should consider leaving as of 25 March 11:30 JST^[16]
General status from all sources regarding reactor cores	Stabilized by injecting water and boron^[17]	Stabilized by injecting water and boron^[17]	Stabilized by injecting water and boron^[17]	Defueled	Cold shutdown on 20 March 14:30 JST^[17]^[18]	Cold shutdown on 20 March 19:27 JST^[17]^[18]
General status from all sources regarding Spent Fuel Pools (SFP)	Cooling system restored 10 August, 32.0 °C on 20 August 11:00 JST^[19]	Cooling system restored 31 May, 36.0 °C on 20 August 11:00 JST^[19]	Cooling system restored 1 July, 32.8 °C on 20 August 11:00 JST^[19]	Cooling system restored 31 July, 42.0 °C on 20 August 11:00 JST^[19]	Cooling system restored, 26.4 °C on 22 August 06:00 JST^[12]	Cooling system restored, 28.2 °C on 22 August 06:00 JST^[12]

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^ "Kurzübersicht aktuelle Sicherheitslage ([[German language|German]]: overview of current safety status)" (in German). Federal Ministry for Environment, Nature Conservation and Nuclear Safety. 20 MarchMarch 2011. Retrieved 20 March 2011. {{cite web}}: Check date values in: |date= (help); URL–wikilink conflict (help)
^ "Workers must cool 4,546 spent fuel rod bundles". The Asahi Shimbun. 20 March 2011. Retrieved 20 March 2011.
^ "Reactor Core Status of Fukushima Daiichi Nuclear Power Station Unit 1" (PDF). TEPCO. 15 May 2011. Retrieved 18 May 2011.
^ ^a ^b ^c ^d Cite error: The named reference TEPCOCore2and3 was invoked but never defined (see the help page).
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^ JAIF (22 September 2011)Update 255: Overview Overview of the status of countermeasures at Fukushima Daiichi Unit
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[4] "Kurzübersicht aktuelle Sicherheitslage ([[German language|German]]: overview of current safety status)" (in German). Federal Ministry for Environment, Nature Conservation and Nuclear Safety. 20 MarchMarch 2011. Retrieved 20 March 2011. {{cite web}}: Check date values in: |date= (help); URL–wikilink conflict (help)

[5] "Workers must cool 4,546 spent fuel rod bundles". The Asahi Shimbun. 20 March 2011. Retrieved 20 March 2011.

[6] "Reactor Core Status of Fukushima Daiichi Nuclear Power Station Unit 1" (PDF). TEPCO. 15 May 2011. Retrieved 18 May 2011.

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[11] JAIF (22 September 2011)Update 255: Overview Overview of the status of countermeasures at Fukushima Daiichi Unit

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