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Start DateEnd DateHeadlineTextMediaMedia CreditMedia CaptionMedia ThumbnailTypeTag
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3/11/2011 14:46:003/11/2011 14:46:00Unit 2 Fukushima Daiichi TimelineTimeline of technical events at Unit 2SimplyInfo.Org<a href="http://www.simplyinfo.org" title="Visit the site">SimplyInfo Website</a>title
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3/11/2011 14:46:013/11/2011 14:46:01EarthquakeReactor scrammedhttp://earthquake-report.com/wp-content/uploads/2011/03/honshu-11-03-2011.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/11/2011 14:47:003/11/2011 14:47:00Loss Of Offsite PowerLoss of all off site powerhttp://farm9.staticflickr.com/8100/8657451159_ef4dc5d398_o.jpgINPO<a href="http://nas-sites.org/fukushima/files/2012/08/INPO-Meng-August-2012-NAS-FINAL.pdf" title="Visit the site">INPO</a>
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3/11/2011 14:47:013/11/2011 14:47:01Reactor ScramAll control rods fully insertedhttp://farm9.staticflickr.com/8519/8676175586_5dc99e2067_o.jpgINPO<a href="http://nas-sites.org/fukushima/files/2012/08/INPO-Meng-August-2012-NAS-FINAL.pdf" title="Visit the site">INPO</a>
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3/11/2011 14:47:023/11/2011 14:47:02Emergency Diesel Generator 2 StartsEmergency Diesel EDG2 starts automaticallyhttp://photo.tepco.co.jp/library/130306_01/130306_01.jpgINPO<a href="http://nas-sites.org/fukushima/files/2012/08/INPO-Meng-August-2012-NAS-FINAL.pdf" title="Visit the site">INPO</a>
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3/11/2011 14:47:033/11/2011 14:47:03Emergency Diesel Generator 1 StartsEmergency Diesel EDG1 starts automaticallyhttp://photo.tepco.co.jp/library/130306_01/130306_01.jpgINPO<a href="http://nas-sites.org/fukushima/files/2012/08/INPO-Meng-August-2012-NAS-FINAL.pdf" title="Visit the site">INPO</a>
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3/11/2011 14:47:043/11/2011 14:47:04MSIV Closed MSIV's Main Steam Isolation Valves fail in the closed position -normally open http://farm9.staticflickr.com/8124/8657416263_47f34dec52_o.jpgINPO<a href="http://nas-sites.org/fukushima/files/2012/08/INPO-Meng-August-2012-NAS-FINAL.pdf" title="Visit the site">INPO</a>
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3/11/2011 14:50:003/11/2011 14:50:00RCIC Manually StartedOperators start RCIChttp://3.bp.blogspot.com/-mRp0dDxr2_o/TgoqewpX9TI/AAAAAAAAAUw/8n1EwlGXjbs/s1600/rcic_pump.jpgINPO<a href="http://nas-sites.org/fukushima/files/2012/08/INPO-Meng-August-2012-NAS-FINAL.pdf" title="Visit the site">INPO</a>
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3/11/2011 14:51:003/11/2011 14:51:00RCIC Automatically ShutdownRCIC Auto shutdown due to high RPV water levelhttp://farm9.staticflickr.com/8125/8660176913_2f57cf8e1c_o.jpgINPO<a href="http://nas-sites.org/fukushima/files/2012/08/INPO-Meng-August-2012-NAS-FINAL.pdf" title="Visit the site">INPO</a>
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3/11/2011 14:52:003/11/2011 14:52:00SRV Controlling Pressure Automatically SRV's in auto, controlling reactor vessel pressurehttp://farm9.staticflickr.com/8126/8657436885_3d2b6001c9_o.jpgINPO<a href="http://nas-sites.org/fukushima/files/2012/08/INPO-Meng-August-2012-NAS-FINAL.pdf" title="Visit the site">INPO</a>
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3/11/2011 15:00:003/11/2011 15:00:00RHR Starts Wetwell CoolingRHR system cooling wetwell, aka torus or suppression chamberhttp://farm9.staticflickr.com/8385/8674815641_38af1fd5e3_o.jpgSNL<a href="http://energy.sandia.gov/wp/wp-content/gallery/uploads/Fukushima_SAND2012-6173.pdf" title="Visit the site">SNL</a>
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3/11/2011 15:02:003/11/2011 15:02:00RCIC Manually StartedOperators start RCIChttp://3.bp.blogspot.com/-mRp0dDxr2_o/TgoqewpX9TI/AAAAAAAAAUw/8n1EwlGXjbs/s1600/rcic_pump.jpgSNL<a href="http://energy.sandia.gov/wp/wp-content/gallery/uploads/Fukushima_SAND2012-6173.pdf" title="Visit the site">SNL</a>
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3/11/2011 15:07:003/11/2011 15:07:00RHR StoppedRHR system cooling of wetwell torus stopshttps://farm9.staticflickr.com/8385/8674815641_66e879ff55_n.jpgJNTIhttp://www.gengikyo.jp/english/shokai/Tohoku_Jishin/report.pdf
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3/11/2011 15:25:003/11/2011 15:25:00Torus Spray Started Operators start torus suppression chamber spray cooling https://farm8.staticflickr.com/7391/16374507649_e27472527b_n.jpgINPO<a href="http://energy.sandia.gov/wp/wp-content/gallery/uploads/Fukushima_SAND2012-6173.pdf" title="Visit the site">SNL</a>
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3/11/2011 15:27:003/11/2011 15:27:001st Tsunami Wave1st tsunami wave hits the planthttp://farm9.staticflickr.com/8119/8657415885_dd3e0981db_o.jpgSNL<a href="http://energy.sandia.gov/wp/wp-content/gallery/uploads/Fukushima_SAND2012-6173.pdf" title="Visit the site">SNL</a>SNL<a href="http://energy.sandia.gov/wp/wp-content/gallery/uploads/Fukushima_SAND2012-6173.pdf" title="Visit the site">SNL</a>
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3/11/2011 15:28:003/11/2011 15:28:00RCIC Stops RCIC stopshttp://farm9.staticflickr.com/8125/8660176913_2f57cf8e1c_o.jpgSNL<a href="http://energy.sandia.gov/wp/wp-content/gallery/uploads/Fukushima_SAND2012-6173.pdf" title="Visit the site">SNL</a>
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3/11/2011 15:31:003/11/2011 15:31:00HPCI InoperableHPCI inoperable due to no DC powerhttps://farm9.staticflickr.com/8120/8658465390_5287e422b2_n.jpgANS<a href="http://fukushima.ans.org/inc/Fukushima_Appendix_H.pdf" title="Visit the site">ANS</a>
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3/11/2011 15:35:003/11/2011 15:35:002nd Tsunami Wave2nd tsunami wave hits the planthttp://farm9.staticflickr.com/8119/8657415885_dd3e0981db_o.jpgSNL<a href="http://energy.sandia.gov/wp/wp-content/gallery/uploads/Fukushima_SAND2012-6173.pdf" title="Visit the site">SNL</a>SNL<a href="http://energy.sandia.gov/wp/wp-content/gallery/uploads/Fukushima_SAND2012-6173.pdf" title="Visit the site">SNL</a>
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3/11/2011 15:36:003/11/2011 15:36:00RHR StopsRHR stopshttp://farm9.staticflickr.com/8534/8675062483_1f56151747.jpgSNL<a href="http://energy.sandia.gov/wp/wp-content/gallery/uploads/Fukushima_SAND2012-6173.pdf" title="Visit the site">SNL</a>
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3/11/2011 15:39:003/11/2011 15:39:00RCIC StartsRCIC starts manually http://3.bp.blogspot.com/-mRp0dDxr2_o/TgoqewpX9TI/AAAAAAAAAUw/8n1EwlGXjbs/s1600/rcic_pump.jpgSNL<a href="http://energy.sandia.gov/wp/wp-content/gallery/uploads/Fukushima_SAND2012-6173.pdf" title="Visit the site">SNL</a>
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3/11/2011 15:41:003/11/2011 15:41:00Station BlackoutTotal loss of power (Including DC)http://farm9.staticflickr.com/8100/8657451159_ef4dc5d398_o.jpgSNL<a href="http://energy.sandia.gov/wp/wp-content/gallery/uploads/Fukushima_SAND2012-6173.pdf" title="Visit the site">SNL</a>
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3/11/2011 15:41:013/11/2011 15:41:01HPCI Failed To StartHigh Pressure Coolant Injection fails to start due to loss of dc powerhttp://farm9.staticflickr.com/8099/8591868991_27ec6658e4.jpgSNL<a href="http://energy.sandia.gov/wp/wp-content/gallery/uploads/Fukushima_SAND2012-6173.pdf" title="Visit the site">SNL</a>
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3/11/2011 15:41:023/11/2011 15:41:02RHR Service Water FailsRHR service water fails to operatehttp://farm9.staticflickr.com/8534/8675062483_1f56151747.jpgSNL<a href="http://energy.sandia.gov/wp/wp-content/gallery/uploads/Fukushima_SAND2012-6173.pdf" title="Visit the site">SNL</a>
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3/11/2011 15:41:033/11/2011 15:41:03Multiple System Failures From TsunamiDiesel generators 2A and 2B both fail. 2B fails due to power panel failure. Power panels flooded by tsunami taking out power distribution, loss of instrumentation, loss of monitoring for HPCI and RCIC, loss of normal and emergency lighting, https://farm9.staticflickr.com/8659/16375131309_59448ecde2_o.jpgINPO<a href="https://www.dropbox.com/s/qqrx7u04a5mo0ut/INPO%2011_005_Special_Report_on_Fukushima_Daiichi_MASTER_11_08_11_1.pdf?dl=0" title="Visit the site">INPO</a>
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3/11/2011 15:50:003/11/2011 15:50:00Loss Of Instrument FunctionPower to measuring instruments lost including water level and drywell pressureJNTI<a href="http://www.gengikyo.jp/english/shokai/Tohoku_Jishin/report.pdf" title="Visit the site">JNTI</a>
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3/11/2011 16:02:003/11/2011 16:02:00RCIC offRCIC tripped on high RPV water levelhttp://farm9.staticflickr.com/8125/8660176913_2f57cf8e1c_o.jpgANS<a href="http://fukushima.ans.org/inc/Fukushima_Appendix_H.pdf" title="Visit the site">ANS</a>
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3/11/2011 16:03:003/11/2011 16:03:00RCIC started manuallyRCIC started manuallyhttp://3.bp.blogspot.com/-mRp0dDxr2_o/TgoqewpX9TI/AAAAAAAAAUw/8n1EwlGXjbs/s1600/rcic_pump.jpgANS<a href="http://fukushima.ans.org/inc/Fukushima_Appendix_H.pdf" title="Visit the site">ANS</a>
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3/11/2011 16:36:003/11/2011 16:36:00Can't Read Reactor Water LevelAmong other instruments lost, reactor water level can't be read. Batteries and cables are brought in to try to power instruments to read them.INPO<a href="https://www.dropbox.com/s/qqrx7u04a5mo0ut/INPO%2011_005_Special_Report_on_Fukushima_Daiichi_MASTER_11_08_11_1.pdf?dl=0" title="Visit the site">INPO</a>
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3/11/2011 17:12:003/11/2011 17:12:00Plan Considered To Inject Water By RHRWorkers considered using the RHR system to connect into and inject water to the reactor via fire truckhttp://farm9.staticflickr.com/8385/8674815641_38af1fd5e3_o.jpgINPO<a href="https://www.dropbox.com/s/qqrx7u04a5mo0ut/INPO%2011_005_Special_Report_on_Fukushima_Daiichi_MASTER_11_08_11_1.pdf?dl=0" title="Visit the site">INPO</a>
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3/11/2011 20:07:003/11/2011 20:07:00RPV Pressure 7000RPV pressure instrument read at 7000http://farm6.staticflickr.com/5280/6926257642_0008178346.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/11/2011 20:49:003/11/2011 20:49:00Temporary LightingTemporary lighting to the main control room workinghttp://farm8.staticflickr.com/7248/7072335835_ff82cae871.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/11/2011 21:02:003/11/2011 21:02:00Water At Top Of FuelWater level may have dropped to top of fuel assemblies http://farm9.staticflickr.com/8110/8659549172_b3c5b05398_o.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/11/2011 21:30:003/11/2011 21:30:00Workers Run Power CablesWorkers begin running cabling to power SLC pumps SNL<a href="http://energy.sandia.gov/wp/wp-content/gallery/uploads/Fukushima_SAND2012-6173.pdf" title="Visit the site">SNL</a>
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3/11/2011 21:50:003/11/2011 21:50:00Water level 3400 mm Reactor water level readout restored in main control room, water is 3400mm above the top of the fuel assemblieshttp://farm8.staticflickr.com/7363/8715246204_9d93df8c83.jpgSNL<a href="http://energy.sandia.gov/wp/wp-content/gallery/uploads/Fukushima_SAND2012-6173.pdf" title="Visit the site">SNL</a>
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3/11/2011 22:00:003/11/2011 22:00:00RCIC operation can't be confirmedOperation of the RCIC can't be confirmedhttp://3.bp.blogspot.com/-mRp0dDxr2_o/TgoqewpX9TI/AAAAAAAAAUw/8n1EwlGXjbs/s1600/rcic_pump.jpgANS<a href="http://fukushima.ans.org/inc/Fukushima_Appendix_H.pdf" title="Visit the site">ANS</a>
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3/11/2011 23:25:003/11/2011 23:25:00Drywell Pressure DW pressure readout restored, pressure readings of 20 PSIA, 9.141 mPahttp://farm6.staticflickr.com/5280/6926257642_0008178346.jpgSNL<a href="http://energy.sandia.gov/wp/wp-content/gallery/uploads/Fukushima_SAND2012-6173.pdf" title="Visit the site">SNL</a>
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3/11/2011 23:25:013/11/2011 23:25:01RPV Pressure 6300RPV Pressure instrument restored, read at 6300 (6.3 mpa)http://farm6.staticflickr.com/5280/6926257642_0008178346.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/11/2011 23:54:003/11/2011 23:54:00Drywell Pressure 40 mpaDrywell Pressure 40 mpahttp://farm6.staticflickr.com/5280/6926257642_0008178346.jpgANS<a href="http://fukushima.ans.org/inc/Fukushima_Appendix_H.pdf" title="Visit the site">ANS</a>
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3/12/2011 1:30:003/12/2011 1:30:00RPV Pressure 5300, Drywell .151 absRPV Pressure 5300, Drywell .151 abshttp://farm6.staticflickr.com/5280/6926257642_0008178346.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/12/2011 2:50:003/12/2011 2:50:00RPV Pressure 5600RPV Pressure instrument read at 5600http://farm6.staticflickr.com/5280/6926257642_0008178346.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/12/2011 2:55:003/12/2011 2:55:00RCIC Function ConfirmedWorkers confirm the function of the RCIC. Wearing breathing protection and boots, workers attempted to verify the condition of RCIC. 10 minutes of work took an hour. Water level in RCIC room was up to workers boots. Could hear faint metallic sounds and assume this is the RCIC operating. Second attempt to check RCIC, room had more water. RCIC exit pump pressure was checked on an instrument rackhttp://3.bp.blogspot.com/-mRp0dDxr2_o/TgoqewpX9TI/AAAAAAAAAUw/8n1EwlGXjbs/s1600/rcic_pump.jpgTEPCO, INPO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/12/2011 3:15:003/12/2011 3:15:00Drywell Pressure .161 absDrywell pressure read at .161 abshttp://farm6.staticflickr.com/5280/6926257642_0008178346.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/12/2011 3:58:003/12/2011 3:58:00AftershockAftershock at the planthttp://www.fukuleaks.org/web/wp-content/uploads/2015/02/japanquake-150x150.jpgANS<a href="http://fukushima.ans.org/inc/Fukushima_Appendix_H.pdf" title="Visit the site">ANS</a>
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3/12/2011 4:20:003/12/2011 4:20:00RCIC Suction In WetwellRCIC now drawing water off the wetwell aka torus or suppression chamberhttp://3.bp.blogspot.com/-mRp0dDxr2_o/TgoqewpX9TI/AAAAAAAAAUw/8n1EwlGXjbs/s1600/rcic_pump.jpgSNL<a href="http://energy.sandia.gov/wp/wp-content/gallery/uploads/Fukushima_SAND2012-6173.pdf" title="Visit the site">SNL</a>
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3/12/2011 8:46:003/12/2011 8:46:00Reactor Water Level 3600Reactor water level 3600, RPV pressure 6000, Drywell pressure .186 abshttp://farm8.staticflickr.com/7363/8715246204_9d93df8c83.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/12/2011 12:55:003/12/2011 12:55:00Reactor Water Level 3600Reactor water level 3600. RPV pressure 6100, Drywell pressure .211 abshttp://farm8.staticflickr.com/7363/8715246204_9d93df8c83.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/12/2011 15:22:003/12/2011 15:22:00Reactor Water Level 3600Reactor water level 3600, RPV pressure 6300, Drywell pressure .231 abshttp://farm8.staticflickr.com/7363/8715246204_9d93df8c83.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/12/2011 15:36:003/12/2011 15:36:00AftershockAftershock at the plant, Unit 1 explosion at the same timehttps://farm8.staticflickr.com/7438/16562936751_7733026baa_n.jpgANS<a href="http://fukushima.ans.org/inc/Fukushima_Appendix_H.pdf" title="Visit the site">ANS</a>
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3/12/2011 15:37:003/12/2011 15:37:00Reactor Water Level Drops to 3550Reactor water level drops for first time down to 3550http://farm8.staticflickr.com/7363/8715246204_9d93df8c83.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/12/2011 17:30:003/12/2011 17:30:00Preparations To VentPlant manager gives order to vent reactor. Media reports "some steam" releasedhttp://farm9.staticflickr.com/8351/8335279600_820e862a96_o.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/12/2011 18:20:003/12/2011 18:20:00RPV Pressure 3600RPV pressure 3600, Drywell pressure .256 abshttp://farm6.staticflickr.com/5280/6926257642_0008178346.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/12/2011 20:05:003/12/2011 20:05:00Effort to restore power abandonedWorkers ordered to anti-seismic building after unit 1 explodeshttps://farm8.staticflickr.com/7258/7072236665_d8abbe1d00_o.jpgTEPCO<a href="http://www.tepco.co.jp/en/nu/fukushima-np/plant-data/f1_7_Sousajisseki_20110717.pdf" title="Visit the site">TEPCO</a>
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3/13/2011 3:00:003/13/2011 3:00:00Reactor Water 3650Reactor water 3650, RPV pressure 6.098 Drywell pressure .315 abs *ANS notes the slow rise of drywell pressure here could incidate a leakhttp://farm8.staticflickr.com/7363/8715246204_9d93df8c83.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/13/2011 8:00:003/13/2011 8:00:00Reactor Water 3650Reactor water 3650, RPV pressure 6.100, Drywell pressure .350http://farm8.staticflickr.com/7363/8715246204_9d93df8c83.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/13/2011 8:10:003/13/2011 8:10:00Containment Vent OpenPCV containment vent valve open. *ANS notes the MOV was opened 25%. INPO cites vent valve MO-271 was openedhttp://farm9.staticflickr.com/8351/8335279600_820e862a96_o.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/13/2011 9:25:003/13/2011 9:25:00Reactor Water 3700Reactor water 3700, RPV pressure 6.080, Drywell pressure .365 abshttp://farm6.staticflickr.com/5280/6926257642_0008178346.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/13/2011 9:55:003/13/2011 9:55:00Reactor Water 3700Reactor water 3700, RPV pressure 1.283, Drywell pressure .160 abshttp://farm8.staticflickr.com/7363/8715246204_9d93df8c83.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/13/2011 10:15:003/13/2011 10:15:00Additional Valve OpenedWorkers used the small generator in the control room, which had been installed to restore some lighting, to
energize the solenoid for the large air-operated suppression chamber vent valve AO-205		INPO<a href="https://www.dropbox.com/s/qqrx7u04a5mo0ut/INPO%2011_005_Special_Report_on_Fukushima_Daiichi_MASTER_11_08_11_1.pdf?dl=0" title="Visit the site">INPO</a>
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3/13/2011 11:00:003/13/2011 11:00:00Venting Ready Except Rupture DiscVenting prepared except rupture dischttp://farm9.staticflickr.com/8351/8335279600_820e862a96_o.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/13/2011 11:20:003/13/2011 11:20:00Venting CommencedVenting commencedhttp://farm9.staticflickr.com/8351/8335279600_820e862a96_o.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/13/2011 11:35:003/13/2011 11:35:00Reactor Water 3700Reactor water 3700, Drywell pressure .380 abshttp://farm8.staticflickr.com/7363/8715246204_9d93df8c83.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/13/2011 12:05:003/13/2011 12:05:00Prepare To Use SeawaterPlant manager gives order to prepare to inject sea water into the reactorhttp://farm9.staticflickr.com/8125/8659623360_5c84d6def3_z.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/13/2011 13:52:003/13/2011 13:52:00Radiation Increase1557.5 μSv/h at MP4 https://farm8.staticflickr.com/7489/16020015252_b3cb7a2afd_n.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/13/2011 14:15:003/13/2011 14:15:00Reactor Water 3750Reactor water 3750, Drywell pressure .390 abshttp://farm8.staticflickr.com/7363/8715246204_9d93df8c83.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/13/2011 14:45:003/13/2011 14:45:00Reactor Water 3750Reactor water 3750, Drywell pressure .395 abshttp://farm8.staticflickr.com/7363/8715246204_9d93df8c83.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
67
3/13/2011 15:30:003/13/2011 15:30:00Reactor Water 3750Reactor water 3750, RPV pressure 5.850, Drywell pressure .400 abshttp://farm8.staticflickr.com/7363/8715246204_9d93df8c83.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
68
3/13/2011 22:00:003/13/2011 22:00:00Reactor Water 3900Reactor water 3900 Drywell pressure .430 abshttp://farm8.staticflickr.com/7363/8715246204_9d93df8c83.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
69
3/13/2011 23:59:003/13/2011 23:59:00Reactor Water 3900Reactor water 3900 Drywell pressure .435 abshttp://farm8.staticflickr.com/7363/8715246204_9d93df8c83.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/14/2011 0:05:003/14/2011 0:05:00Preparation For Seawater InjectionPlant manager orders preparation for seawater injectionhttp://farm9.staticflickr.com/8125/8659623360_5c84d6def3_z.jpgANS<a href="http://fukushima.ans.org/inc/Fukushima_Appendix_H.pdf" title="Visit the site">ANS</a>
71
3/14/2011 1:30:003/14/2011 1:30:00Reactor Water 3900Reactor water 3900, Drywell pressure .440 abshttp://farm8.staticflickr.com/7363/8715246204_9d93df8c83.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
72
3/14/2011 1:40:003/14/2011 1:40:00NISA cites problem with injecting water at unit 2TEPCO headquarters official handling contact with government ministries and agencies began speaking with these words: “We’ve got something urgent.” It was about NISA’s repeated instruction to inject water into the No. 2 reactor. The RCIC would soon no longer work. NISA officials wanted TEPCO to switch as soon as possible to the injection of water from outside sources. There arose a serious obstacle to letting that happen: There was little seawater available nearby in pools, and the fire engine pumps at the plant were incapable of pumping seawater from the ocean because they had insufficient power to lift water over the 10-meter elevation from sea level. https://farm9.staticflickr.com/8648/16378457049_8bcf71fa20_n.jpgMain Timeline<a href="http://www.fukuleaks.org/web/?page_id=7419" title="Visit the site">SimplyInfo.org Main Daiichi Timeline</a>
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3/14/2011 3:05:003/14/2011 3:05:00Problem with TEPCO contract fire fightersContracted fire crews from Nanmei Kosan expressed concerns over the rising radiation levels. TEPCO debated telling them there was no risk, ended up having Nanmei Kosan's office demand the workers stay.https://farm6.staticflickr.com/5191/6948992456_5fe8fb00e9_n.jpgMain Timeline<a href="http://www.fukuleaks.org/web/?page_id=7419" title="Visit the site">SimplyInfo.org Main Daiichi Timeline</a>
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3/14/2011 4:30:003/14/2011 4:30:00Reactor Water 3900Reactor water 3900, RPV pressure 5.400, S/C pressure .467http://farm8.staticflickr.com/7363/8715246204_9d93df8c83.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
75
3/14/2011 6:00:003/14/2011 6:00:00CAMS Radiation ReadingsDrywell CAMS 1.00E-03 SC CAMS 9.00E-03https://farm8.staticflickr.com/7405/15942497424_78e6a08bf7_n.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
76
3/14/2011 7:45:003/14/2011 7:45:00CAMS Radiation ReadingsDrywell CAMS 1.00E-03 SC CAMS 9.50E-03https://farm8.staticflickr.com/7405/15942497424_78e6a08bf7_n.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
77
3/14/2011 8:00:003/14/2011 8:00:00CAMS Radiation ReadingsDrywell CAMS 1.00E-03 SC CAMS 1.00E-02https://farm8.staticflickr.com/7405/15942497424_78e6a08bf7_n.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/14/2011 9:34:003/14/2011 9:34:00Unsure if SC vent openedCould not confirm SC vent open or not at the timeANS<a href="http://fukushima.ans.org/inc/Fukushima_Appendix_H.pdf" title="Visit the site">ANS</a>
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3/14/2011 9:37:003/14/2011 9:37:00Radiation Increase3130.0 μSv/h at Main Gatehttps://farm8.staticflickr.com/7432/16378855087_df61e243d0_n.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
80
3/14/2011 9:45:003/14/2011 9:45:00CAMS Radiation ReadingsDrywell CAMS 1.00E-03 SC CAMS 1.20E-02https://farm8.staticflickr.com/7405/15942497424_78e6a08bf7_n.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
81
3/14/2011 10:15:003/14/2011 10:15:00CAMS Radiation ReadingsDrywell CAMS 1.00E-03 SC CAMS 9.70E-03https://farm8.staticflickr.com/7405/15942497424_78e6a08bf7_n.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/14/2011 11:01:003/14/2011 11:01:00Unit 3 ExplodesUnit 3 explodeshttps://farm8.staticflickr.com/7414/15945068883_9852e1a543_o.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/14/2011 11:01:013/14/2011 11:01:01Torus Valve DamagedVenting valve to torus suppression chamber damaged by unit 3 explosion. Is now closed. Vent valve AO-205TEPCO, INPO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/14/2011 11:01:023/14/2011 11:01:02Fire Engine & Injection Line DamagedFire engine and water injection line damaged by unit 3 explosionhttp://farm9.staticflickr.com/8125/8659623360_5c84d6def3_z.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/14/2011 11:01:033/14/2011 11:01:03Torus vent pipe damagedThe valves’ closed status and inability to be opened confirmedTEPCO<a href="http://www.tepco.co.jp/en/nu/fukushima-np/plant-data/f1_7_Sousajisseki_20110717.pdf" title="Visit the site">TEPCO</a>
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3/14/2011 11:30:003/14/2011 11:30:00CAMS Radiation ReadingsDrywell 1.00E-03, SC 1.20E-02https://farm8.staticflickr.com/7405/15942497424_78e6a08bf7_n.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/14/2011 12:00:003/14/2011 12:00:00SC temps and water levelSuppression Chamber temp 147c, pressure 485 kpa, water level decreasing https://farm8.staticflickr.com/7391/16374507649_e27472527b_n.jpgANS<a href="http://fukushima.ans.org/inc/Fukushima_Appendix_H.pdf" title="Visit the site">ANS</a>
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3/14/2011 12:30:003/14/2011 12:30:00RPV water level 2950mm* doesn't say if this is above or below fuel, assumed abovehttp://farm8.staticflickr.com/7363/8715246204_9d93df8c83.jpgANS<a href="http://fukushima.ans.org/inc/Fukushima_Appendix_H.pdf" title="Visit the site">ANS</a>
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3/14/2011 13:00:003/14/2011 13:00:00TEPCO communication With DaiichiYoshida asks TEPCO HQ over concerns of hydrogen build up in unit 2 “I want you to think of ways to open a hole in the reactor building immediately by using helicopters or whatever.“ http://www.fukuleaks.org/web/wp-content/uploads/2014/05/2013-07-06_masao-yoshida-ancien-directeur-Fukushima.jpgMain Timeline<a href="http://www.fukuleaks.org/web/?page_id=7419" title="Visit the site">SimplyInfo.org Main Daiichi Timeline</a>
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3/14/2011 13:05:003/14/2011 13:05:00Reconnection Of Fire LineWork starts to reconnect water injection fire line. Workers switched to using the harbor to pull sea water after unit 3 exploded. Previous work used the backwash valve pit by unit 3. It was now high in radiation and debris. http://farm9.staticflickr.com/8125/8659623360_5c84d6def3_z.jpgTEPCO, INPO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
91
3/14/2011 13:18:003/14/2011 13:18:00Reactor Water DroppingReactor water level on downward trendhttp://farm9.staticflickr.com/8122/8676039680_d8103f69c9.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/14/2011 13:25:003/14/2011 13:25:00RCIC FailureRCIC appears to be lost (at time of trip, indicated water level was approx 95 inches (2400mm) above (top of fuel) TAF, drywell pressure 67 psi (465 kPa)http://farm9.staticflickr.com/8125/8660176913_2f57cf8e1c_o.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
93
3/14/2011 14:00:003/14/2011 14:00:00Suppression Pool SaturatedSuppression chamber reaches saturation point. Water at the point it can no longer quench steam or cool steam releaseshttps://farm8.staticflickr.com/7391/16374507649_e27472527b_n.jpgWNA, INPO <a href="http://www.world-nuclear.org" title="Visit the site">WNA</a>
94
3/14/2011 14:40:003/14/2011 14:40:00CAMS Radiation ReadingsDrywell 1.00E-03, SC 1.30E-02https://farm8.staticflickr.com/7405/15942497424_78e6a08bf7_n.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
95
3/14/2011 15:15:003/14/2011 15:15:00CAMS Radiation ReadingsDrywell 1.08E-03 SC 1.03E-02https://farm8.staticflickr.com/7405/15942497424_78e6a08bf7_n.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/14/2011 16:34:003/14/2011 16:34:00RPV depressurization SRV openRPV depressurization SRV open * TEPCO admitted in 2015 that SRV nitrogen actuation lines fail at 170c temperatures rendering the valves unusable.https://farm9.staticflickr.com/8662/16564288592_be9bc7d6a9_n.jpgTEPCO<a href="http://www.tepco.co.jp/en/nu/fukushima-np/plant-data/f1_7_Sousajisseki_20110717.pdf" title="Visit the site">TEPCO</a>
97
3/14/2011 16:34:013/14/2011 16:34:01Seawater Injection StartsSeawater injection using the firefighting line commenced. **2014 reports admit that all or most of this fire line injection water back flowed into the turbine building due to the lack of backflow valves in the piping. https://farm9.staticflickr.com/8603/15945246293_5152c85271_n.jpgTEPCO<a href="http://www.tepco.co.jp/en/nu/fukushima-np/plant-data/f1_7_Sousajisseki_20110717.pdf" title="Visit the site">TEPCO</a>
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3/14/2011 16:45:003/14/2011 16:45:00Debate between Daiichi and TEPCO HQConfusion over ability to establish the venting line, HQ wanting water injected, apparently not understanding the need to vent.https://farm9.staticflickr.com/8648/16378457049_8bcf71fa20_n.jpgMain Timeline<a href="http://www.fukuleaks.org/web/?page_id=7419" title="Visit the site">SimplyInfo.org Main Daiichi Timeline</a>
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3/14/2011 17:17:003/14/2011 17:17:00Water Level Falls To Top Of FuelWater in the reactor falls to top of fuel assemblieshttp://farm9.staticflickr.com/8103/8674938681_9423c9953a.jpgTEPCO<a href="http://www.simplyinfo.org/wp-content/uploads/2013/03/TEPCOtimeline110618e15-1.pdf" title="Visit the site">TEPCO</a>
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3/14/2011 18:02:003/14/2011 18:02:00Pressure Decrease, SRV 2 Opened AgainReactor pressure decrease confirmed
SRV2 valve opened to resume
depressurization due to insufficient reactor
pressure decrease * ANS cites SRVs have no air pressure or voltage at this point *** TEPCO admitted in 2015 that SRV nitrogen actuation lines fail at 170c temperatures rendering the valves unusable.		https://farm9.staticflickr.com/8662/16564288592_be9bc7d6a9_n.jpgTEPCO<a href="http://www.tepco.co.jp/en/nu/fukushima-np/plant-data/f1_7_Sousajisseki_20110717.pdf" title="Visit the site">TEPCO</a>