fbpx
Wikipedia

Fukushima Daini Nuclear Power Plant

The Fukushima Daini Nuclear Power Plant (福島第二原子力発電所, Fukushima Daini (pronunciation) Genshiryoku Hatsudensho, Fukushima II NPP, 2F) is a nuclear power plant located on a 150 ha (370-acre) site[1] in the town of Naraha and Tomioka in the Futaba District of Fukushima Prefecture, Japan. The Tokyo Electric Power Company (TEPCO) runs the plant.

Fukushima Daini Nuclear Power Plant
The Fukushima II NPP, pictured in 2015
CountryJapan
LocationNaraha
Coordinates37°18′59″N 141°1′32″E / 37.31639°N 141.02556°E / 37.31639; 141.02556
StatusDecommissioned
Construction beganMarch 16, 1976 (1976-03-16)
Commission dateApril 20, 1982 (1982-04-20)
Decommission dateSeptember 30, 2019 (2019-09-30)
Owner(s)
Operator(s)Tokyo Electric Power Company
Nuclear power station
Reactor typeBWR
Reactor supplierToshiba
Hitachi
Power generation
Units operational4 × 1,100 MW
Nameplate capacity4,400 MW
Capacity factor0%
Annual net output0 GW·h
External links
WebsiteHome page
CommonsRelated media on Commons

After the 2011 Tōhoku earthquake and tsunami, the four reactors at Fukushima Daini automatically shut down.[2] While the sister plant Fukushima Daiichi Nuclear Power Plant, approximately 12 km (7.5 mi) to the north, suffered extensive damage, the Daini Plant was back under control within two days, reaching cold shutdown.[3] The plant has not been operating since, and in July 2019 a decision to decommission the plant was made.[4]

Description edit

All reactors in the Fukushima II Nuclear Power Plant are BWR-5 type[5] with electric power of 1,100 MW each (net output: 1,067 MW each).[6]

The reactors for units 1 and 3 were supplied by Toshiba, and for units 2 and 4 by Hitachi. Units 1–3 were built by Kajima while the unit 4 was built by Shimizu and Takenaka.[6]

Unit First criticality Installation costs
(million yen/MW)
Reactor supplier Architecture Construction Containment[7]
1 31/07/1981 250 Toshiba Toshiba Kajima Mark 2
2 23/06/1983 230 Hitachi Hitachi Kajima Mark 2 advanced
3 14/12/1984 290 Toshiba Toshiba Kajima Mark 2 advanced
4 17/12/1986 250[8] Hitachi Hitachi Shimizu
Takenaka
Mark 2 advanced

Electrical connections edit

The Fukushima Daini plant is connected to the rest of the power grid by the Tomioka Line (富岡線) to the Shin-Fukushima (New Fukushima) substation.[9]

Events edit

1989 incident edit

In January 1989, an impeller blade on one of the reactor coolant pumps in Unit 3 broke at a weld, causing a large amount of metal debris to flow throughout the primary loop. As a result, the reactor was shut down for a considerable length of time.[10]

2011 earthquake and tsunami edit

The March 11, 2011 Tōhoku earthquake resulted in maximum horizontal ground accelerations of 0.21 g (2.10 m/s2) to 0.28 (2.77 m/s2) at the plant site, which is well below the design basis.[11][12] The design basis accident for an earthquake was between 0.42 g (4.15 m/s2) and 0.52 g (5.12 m/s2) and for a tsunami was 5.2 m.[11] All four units were automatically shut down (scram) immediately after the earthquake,[2] and the diesel engines were started to power the reactor cooling.[13] A worker died of injuries from the earthquake when he was trapped in the crane operating console of the exhaust stack.[14][15][16][17][18]

The tsunami that followed the earthquake and inundated the plant was initially estimated by TEPCO to be 14 meters high, which would have been more than twice the designed height.[11] Other sources give the tsunami height at Fukushima Daini plant at 9-meter-high, while the Fukushima Daiichi plant was hit by a 13-meter-high tsunami. The tsunami caused the plant's seawater pumps, used to cool reactors, to fail. Of the plant's four reactors, three were in danger of meltdown.[19] One external high-voltage power line still functioned, allowing plant staff in the central control room to monitor data on internal reactor temperatures and water levels. 2,000 employees of the plant worked to stabilize the reactors. Some employees connected over 9 kilometers of cabling using 200-meter sections of cable, each weighing more than a ton, from their Rad Waste Building to other locations onsite.

The steam-powered reactor core isolation cooling system (RCIC) in all 4 units was activated and ran as needed to maintain water level. At the same time, operators utilized the safety relief valve systems to keep the reactor pressures from getting too high by dumping the heat to the suppression pools.[13] In unit 3, one seawater pump remained operational and the residual heat removal system (RHR) was started to cool the suppression pool and later brought the reactor to cold shutdown on March 12. In units 1, 2, and 4 heat removal was unavailable, so the suppression pools began heating up and on March 12, the water temperature in the pools of units 1, 2, and 4 reached 100 °C between 05:30 and 06:10 JST,[20][21][22] removing the ability to remove pressure from the reactor and drywell.[13]

Operators had to also prepare an alternate injection line for each unit, as the RCIC can run indefinitely only while there is sufficient pressure and steam in the reactor to drive its turbine. Once the reactor pressure drops below a certain level, the RCIC shuts down automatically. The normal electrically driven Emergency Core Cooling Systems (ECCS) were for the most part unavailable due to the loss of the ultimate heat sink and damage to some of the electrical infrastructure. Operators prepared for this and set up an alternate injection line using a non-emergency system known as the Makeup Water Condensate (MUWC) system to maintain water level which was an accident mitigation method TEPCO put in place at all its nuclear plants.[citation needed] The system was started and stopped in all 4 units, including unit 3, as needed to maintain the water level. The RCICs in each unit later shut down due to low reactor pressure.[when?][citation needed] The MUWC and the makeup water purification and filtering (MUPF) systems were also used to try to cool the suppression pool and drywell in addition to the reactor to prevent the drywell pressure from getting too high. Operators were later able to restore the High Pressure Core Spray portion of the ECCS in unit 4 and switched emergency water injection for unit 4 from the MUWC system to the HPCS.

While the water level was maintained in the three cores using emergency water injection, pressures in the containment vessel continued to rise due to lack of suppression pool cooling and the operators prepared to vent the containments making restoration of heat removal urgent.[clarification needed] Unit 1 was prioritized as it had the highest drywell pressure.[23]

Cold shutdown edit

The ultimate heat sink was restored on March 13 when the service seawater system pumps in the pump room were repaired in units 1, 2 and 4. This allowed the restoration of the normal ECCS and heat removal systems to operable status and cooling was switched to the Residual Heat Removal System (RHR) portion of the ECCS. The RHR systems were first activated to cool down the suppression pools (torus) and drywells to operable status, and water injections were made to the reactors using the Low Pressure Coolant Injection (LPCI) mode as needed. When the suppression pool was cooled down to below 100 °C, the RHR was switched to the shutdown cooling mode and brought the reactors to a cold shutdown.[20]

Coolant temperatures below 100 °C (cold shutdown) were reached in reactor 2 about 34 hours after the emergency shut down (scram).[20] Reactors 1 and 3 followed at 1:24 and 3:52 on March 14 and Reactor 4 at 7:00 on March 15.[24] By March 15, all four reactors of Fukushima II reached cold shutdown, which remained non-threatening.[25]

The loss of cooling water at reactors 1, 2 and 4 was classified a level 3 on the International Nuclear Event Scale (serious incident) by Japanese authorities as of March 18.[26][27][28]

Officials made preparations for release of pressure from the plant on March 12,[29][30] but no pressure release was necessary.[20][31] An evacuation order was issued to the people living within 3 kilometres (1.9 mi) of the plant,[32] subsequently expanded to 10 km (6.2 mi).[14][33] Air traffic was restricted in a 10 km (6.2 mi) radius around the plant, according to a NOTAM.[34] These zones were later superseded by the 20 km evacuation and 30 km no-fly zones around Fukushima Daiichi on March 12 and 15, respectively.[35]

As of June 2011, 7,000 tons of seawater from the tsunami remained in the plant. The plant planned to release it all back into the ocean, as the tanks and structures holding the water were beginning to corrode. Approximately 3,000 tons of the water was found to contain radioactive substances, and Japan's Fisheries Agency refused permission to release that water back into the ocean.[36]

Restoration edit

On December 26, 2011, the Prime Minister officially cancelled the nuclear emergency declaration for the Fukushima Daini plant officially ending the incident. On February 8, 2012, the plant was opened to news media for the first time since the 2011 Tōhoku earthquake and tsunami.

The evacuation order was partly rescinded for Daini evacuees in August 2012. Some of the residents, such as the 7200 at Naraha, were permitted to return during daylight hours only, but others were ordered to remain away. The area did not become seriously contaminated and was safe to visit without protective clothing.[37] In 2015, the evacuation order for Naraha was completely lifted, allowing residents to return and reconstruction efforts to begin. Naraha is the first of a number of towns in the area to have had its evacuation order removed.

2016 earthquake edit

On Tuesday, November 22, 2016, a magnitude 6.9 earthquake struck Japan 37 km (23 mi) east southeast of Namie, Fukushima Prefecture at a depth of 11.3 km (7.0 mi). The shock had a maximum intensity of VII (Very strong).[38] 14 people were injured and more than 1,900 homes briefly lost electricity.[39] Though a warning of a possible tsunami of 3 m (9.8 ft) in height was issued,[40] a 60 cm (24 in) wave was reported by NHK in the port of Onahama of Iwaki, Fukushima; a 90 cm (35 in) wave hit Sōma, Fukushima; and another wave 1 m (3 ft 3 in) in height struck the Fukushima Daiichi Nuclear Power Plant site after the 6.9 shock.[41] Chief Cabinet Secretary Yoshihide Suga said that the third reactor's spent fuel pool cooling systems at Fukushima Daini had stopped as a result of the earthquake; TEPCO later reported the restart of the spent fuel cooling system after only 100 minutes of stoppage.[40][41][42][43]

Decommissioning edit

On 31 July 2019, the TEPCO board of directors decided to decommission the plant, in response to local demands for a decision. Decommissioning is expected to take more than 40 years to complete, and will include moving spent nuclear fuel from spent fuel pools to on-site dry cask storage.[4]

See also edit

References edit

  1. ^ Tepco site (Japanese). Text and answers to the Fukushima II plant quiz[permanent dead link]. Page 8.
  2. ^ a b . Nuclear Engineering International. March 11, 2011. Archived from the original on March 14, 2011. Retrieved March 11, 2011.
  3. ^ Gulati, Ranjay; Casto, Charles; Krontiris, Charlotte (July 2014). "How the Other Fukushima Plant Survived". Harvard Business Review. Retrieved March 16, 2017.
  4. ^ a b "Tepco declares Fukushima Daini for decommissioning". World Nuclear News. July 31, 2019. Retrieved July 31, 2019.
  5. ^ "Reactors in operation". IAEA. December 31, 2009. Retrieved March 12, 2011.
  6. ^ a b . Council for Security Cooperation in the Asia Pacific. Archived from the original on February 15, 2005. Retrieved March 14, 2011.
  7. ^ 福島第二原子力発電所 設備の概要|東京電力. Tepco.co.jp. Retrieved on 2013-09-06.
  8. ^ "原発の発電コスト". Nuketext.org. October 28, 2008. Retrieved March 16, 2011.
  9. ^ Tepco Annual Report 2003 April 3, 2012, at the Wayback Machine. Page 24. (Japanese).
  10. ^ WISE (November 23, 1990). . WISE. Archived from the original on March 26, 2012. Retrieved July 4, 2011.
  11. ^ a b c "Fukushima faced 14-metre tsunami". World Nuclear News. March 24, 2011. Retrieved March 24, 2011.
  12. ^ "The record of the earthquake intensity observed at Fukushima Daiichi Nuclear Power Station and Fukushima Daini Nuclear Power Station (Interim Report)". TEPCO. April 1, 2011.
  13. ^ a b c "Insight to Fukushima engineering challenges". World Nuclear News. March 18, 2011. Retrieved March 19, 2011.
  14. ^ a b "IAEA update on Japan Earthquake". March 12, 2011. Retrieved March 12, 2011.
  15. ^ TEPCO (March 12, 2011). "Press Releases". TEPCO. Retrieved March 12, 2011.:"We sincerely pray for the repose of his soul."
  16. ^ asahi.com (March 12, 2011). "福島第二原発で作業員1人死亡 第一では2人が不明". Retrieved March 20, 2011.
  17. ^ The Sankei News (March 12, 2011). . Archived from the original on March 23, 2011. Retrieved March 20, 2011.
  18. ^ ANN News (March 12, 2011). . Archived from the original on March 15, 2011. Retrieved March 20, 2011.
  19. ^ Yomiuri Shimbun 2012-02-09 Ver.13S page 1&2, Fukushima No. 2 plant was 'near meltdown'
  20. ^ a b c d Cold shutdowns at Fukushima Daini, World Nuclear News, March 14, 2011, retrieved March 14, 2011
  21. ^ reports for reactor 1, reactor 2, and reactor 4 of Tokyo Electric, received 11:50 JST
  22. ^ Winter, Michael "Cooling system fails at 3 reactors at another Japanese nuclear plant" USA Today, March 11, 2011, 6:01 EST.
  23. ^ "Chronology of Events at Fukushima Daini nuclear power station" (PDF). TEPCO.
  24. ^ . March 15, 2011. Archived from the original on March 18, 2011.
  25. ^ "3 Week Update on Japan's Nuclear Crisis". April 2, 2011. Retrieved April 2, 2011.
  26. ^ "IAEA Update on Japan Earthquake". Retrieved March 16, 2011. Japanese authorities have assessed that the loss of cooling functions in the reactor Units 1, 2 and 4 of the Fukushima Daini nuclear power plant has also been rated as 3. All reactor Units at Fukushima Daini nuclear power plant are now in a cold shut down condition..
  27. ^ "Japan nuclear safety agency says level 5 incident at Fukushima reactors No. 1, 2, 3, raised from level 4". The Huffington Post.
  28. ^ Nuclear and Industry Safety Agency (March 18, 2011). "東北太平洋沖地震による福島第一原子力発電所及び福島第二原子力発電所の事故・トラブルに対するINES(国際原子力・放射線事象評価尺度)の適用について" (Press release) (in Japanese). Ministry of Economy, Trade and Industry. Retrieved March 18, 2011.
  29. ^ "RPT-TEPCO releasing pressure at one Fukushima reactor". Reuters. March 11, 2011.
  30. ^ World Nuclear News (March 12, 2011). "Battle to stabilise earthquake reactors". World Nuclear News. Retrieved March 12, 2011.
  31. ^ "Press release 11". TEPCO. March 13, 2011.
  32. ^ "Battle to stabilise earthquake reactors, update 2". World Nuclear News. March 12, 2010.
  33. ^ . Archived from the original on April 2, 2011. Retrieved March 30, 2011. Smoke from Fukushima Daini nuclear plant
  34. ^ "Pilot information for Sendai Airport". March 12, 2011. Retrieved March 12, 2011.
  35. ^ Japan invokes 30km no-fly zone around Fukushima plant; more flights to north-east - Update 4 | CAPA. Centre for Aviation. Retrieved on 2013-09-06.
  36. ^ Kyodo News, "Fishermen to Tepco: Don't release water", Japan Times, June 9, 2011, p. 1.
  37. ^ Restoration plans for Fukushima area. World-nuclear-news.org (2012-09-04). Retrieved on 2013-09-06.
  38. ^ "M6.9 - 37km ESE of Namie, Japan". United States Geological Survey. November 21, 2016. Retrieved November 21, 2016.
  39. ^ Breslin, Sean (November 22, 2016). "Strong Japan Earthquake Produces Tsunami but Spares Major Damage". The Weather Channel. Retrieved November 23, 2016.
  40. ^ a b Fifield, Anna (November 22, 2016). "Tsunami warning for Japan's Fukushima coast after 6.9-magnitude earthquake". The Washington Post. Naha, Japan. ISSN 0190-8286. Retrieved November 23, 2016.
  41. ^ a b "Japan earthquake sparks tsunami at Fukushima". BBC News. November 22, 2016. Retrieved November 23, 2016.
  42. ^ . NHK World. November 22, 2016. Archived from the original on November 24, 2016. Retrieved November 23, 2016.
  43. ^ . NHK World. November 23, 2016. Archived from the original on November 24, 2016. Retrieved November 23, 2016.

External links edit

fukushima, daini, nuclear, power, plant, confused, with, fukushima, daiichi, nuclear, power, plant, 福島第二原子力発電所, fukushima, daini, pronunciation, genshiryoku, hatsudensho, fukushima, nuclear, power, plant, located, acre, site, town, naraha, tomioka, futaba, dis. Not to be confused with Fukushima Daiichi Nuclear Power Plant The Fukushima Daini Nuclear Power Plant 福島第二原子力発電所 Fukushima Daini pronunciation Genshiryoku Hatsudensho Fukushima II NPP 2F is a nuclear power plant located on a 150 ha 370 acre site 1 in the town of Naraha and Tomioka in the Futaba District of Fukushima Prefecture Japan The Tokyo Electric Power Company TEPCO runs the plant Fukushima Daini Nuclear Power PlantThe Fukushima II NPP pictured in 2015CountryJapanLocationNarahaCoordinates37 18 59 N 141 1 32 E 37 31639 N 141 02556 E 37 31639 141 02556StatusDecommissionedConstruction beganMarch 16 1976 1976 03 16 Commission dateApril 20 1982 1982 04 20 Decommission dateSeptember 30 2019 2019 09 30 Owner s TEPCOOperator s Tokyo Electric Power CompanyNuclear power stationReactor typeBWRReactor supplierToshibaHitachiPower generationUnits operational4 1 100 MWNameplate capacity4 400 MWCapacity factor0 Annual net output0 GW hExternal linksWebsiteHome pageCommonsRelated media on Commons edit on Wikidata After the 2011 Tōhoku earthquake and tsunami the four reactors at Fukushima Daini automatically shut down 2 While the sister plant Fukushima Daiichi Nuclear Power Plant approximately 12 km 7 5 mi to the north suffered extensive damage the Daini Plant was back under control within two days reaching cold shutdown 3 The plant has not been operating since and in July 2019 a decision to decommission the plant was made 4 Contents 1 Description 1 1 Electrical connections 2 Events 2 1 1989 incident 2 2 2011 earthquake and tsunami 2 2 1 Cold shutdown 2 2 2 Restoration 2 3 2016 earthquake 2 4 Decommissioning 3 See also 4 References 5 External linksDescription editAll reactors in the Fukushima II Nuclear Power Plant are BWR 5 type 5 with electric power of 1 100 MW each net output 1 067 MW each 6 The reactors for units 1 and 3 were supplied by Toshiba and for units 2 and 4 by Hitachi Units 1 3 were built by Kajima while the unit 4 was built by Shimizu and Takenaka 6 Unit First criticality Installation costs million yen MW Reactor supplier Architecture Construction Containment 7 1 31 07 1981 250 Toshiba Toshiba Kajima Mark 22 23 06 1983 230 Hitachi Hitachi Kajima Mark 2 advanced3 14 12 1984 290 Toshiba Toshiba Kajima Mark 2 advanced4 17 12 1986 250 8 Hitachi Hitachi ShimizuTakenaka Mark 2 advancedElectrical connections edit The Fukushima Daini plant is connected to the rest of the power grid by the Tomioka Line 富岡線 to the Shin Fukushima New Fukushima substation 9 Events edit1989 incident edit In January 1989 an impeller blade on one of the reactor coolant pumps in Unit 3 broke at a weld causing a large amount of metal debris to flow throughout the primary loop As a result the reactor was shut down for a considerable length of time 10 2011 earthquake and tsunami edit This section needs to be updated Please help update this article to reflect recent events or newly available information March 2017 The March 11 2011 Tōhoku earthquake resulted in maximum horizontal ground accelerations of 0 21 g 2 10 m s2 to 0 28 2 77 m s2 at the plant site which is well below the design basis 11 12 The design basis accident for an earthquake was between 0 42 g 4 15 m s2 and 0 52 g 5 12 m s2 and for a tsunami was 5 2 m 11 All four units were automatically shut down scram immediately after the earthquake 2 and the diesel engines were started to power the reactor cooling 13 A worker died of injuries from the earthquake when he was trapped in the crane operating console of the exhaust stack 14 15 16 17 18 The tsunami that followed the earthquake and inundated the plant was initially estimated by TEPCO to be 14 meters high which would have been more than twice the designed height 11 Other sources give the tsunami height at Fukushima Daini plant at 9 meter high while the Fukushima Daiichi plant was hit by a 13 meter high tsunami The tsunami caused the plant s seawater pumps used to cool reactors to fail Of the plant s four reactors three were in danger of meltdown 19 One external high voltage power line still functioned allowing plant staff in the central control room to monitor data on internal reactor temperatures and water levels 2 000 employees of the plant worked to stabilize the reactors Some employees connected over 9 kilometers of cabling using 200 meter sections of cable each weighing more than a ton from their Rad Waste Building to other locations onsite The steam powered reactor core isolation cooling system RCIC in all 4 units was activated and ran as needed to maintain water level At the same time operators utilized the safety relief valve systems to keep the reactor pressures from getting too high by dumping the heat to the suppression pools 13 In unit 3 one seawater pump remained operational and the residual heat removal system RHR was started to cool the suppression pool and later brought the reactor to cold shutdown on March 12 In units 1 2 and 4 heat removal was unavailable so the suppression pools began heating up and on March 12 the water temperature in the pools of units 1 2 and 4 reached 100 C between 05 30 and 06 10 JST 20 21 22 removing the ability to remove pressure from the reactor and drywell 13 Operators had to also prepare an alternate injection line for each unit as the RCIC can run indefinitely only while there is sufficient pressure and steam in the reactor to drive its turbine Once the reactor pressure drops below a certain level the RCIC shuts down automatically The normal electrically driven Emergency Core Cooling Systems ECCS were for the most part unavailable due to the loss of the ultimate heat sink and damage to some of the electrical infrastructure Operators prepared for this and set up an alternate injection line using a non emergency system known as the Makeup Water Condensate MUWC system to maintain water level which was an accident mitigation method TEPCO put in place at all its nuclear plants citation needed The system was started and stopped in all 4 units including unit 3 as needed to maintain the water level The RCICs in each unit later shut down due to low reactor pressure when citation needed The MUWC and the makeup water purification and filtering MUPF systems were also used to try to cool the suppression pool and drywell in addition to the reactor to prevent the drywell pressure from getting too high Operators were later able to restore the High Pressure Core Spray portion of the ECCS in unit 4 and switched emergency water injection for unit 4 from the MUWC system to the HPCS While the water level was maintained in the three cores using emergency water injection pressures in the containment vessel continued to rise due to lack of suppression pool cooling and the operators prepared to vent the containments making restoration of heat removal urgent clarification needed Unit 1 was prioritized as it had the highest drywell pressure 23 Cold shutdown edit The ultimate heat sink was restored on March 13 when the service seawater system pumps in the pump room were repaired in units 1 2 and 4 This allowed the restoration of the normal ECCS and heat removal systems to operable status and cooling was switched to the Residual Heat Removal System RHR portion of the ECCS The RHR systems were first activated to cool down the suppression pools torus and drywells to operable status and water injections were made to the reactors using the Low Pressure Coolant Injection LPCI mode as needed When the suppression pool was cooled down to below 100 C the RHR was switched to the shutdown cooling mode and brought the reactors to a cold shutdown 20 Coolant temperatures below 100 C cold shutdown were reached in reactor 2 about 34 hours after the emergency shut down scram 20 Reactors 1 and 3 followed at 1 24 and 3 52 on March 14 and Reactor 4 at 7 00 on March 15 24 By March 15 all four reactors of Fukushima II reached cold shutdown which remained non threatening 25 The loss of cooling water at reactors 1 2 and 4 was classified a level 3 on the International Nuclear Event Scale serious incident by Japanese authorities as of March 18 26 27 28 Officials made preparations for release of pressure from the plant on March 12 29 30 but no pressure release was necessary 20 31 An evacuation order was issued to the people living within 3 kilometres 1 9 mi of the plant 32 subsequently expanded to 10 km 6 2 mi 14 33 Air traffic was restricted in a 10 km 6 2 mi radius around the plant according to a NOTAM 34 These zones were later superseded by the 20 km evacuation and 30 km no fly zones around Fukushima Daiichi on March 12 and 15 respectively 35 As of June 2011 update 7 000 tons of seawater from the tsunami remained in the plant The plant planned to release it all back into the ocean as the tanks and structures holding the water were beginning to corrode Approximately 3 000 tons of the water was found to contain radioactive substances and Japan s Fisheries Agency refused permission to release that water back into the ocean 36 Restoration edit On December 26 2011 the Prime Minister officially cancelled the nuclear emergency declaration for the Fukushima Daini plant officially ending the incident On February 8 2012 the plant was opened to news media for the first time since the 2011 Tōhoku earthquake and tsunami The evacuation order was partly rescinded for Daini evacuees in August 2012 Some of the residents such as the 7200 at Naraha were permitted to return during daylight hours only but others were ordered to remain away The area did not become seriously contaminated and was safe to visit without protective clothing 37 In 2015 the evacuation order for Naraha was completely lifted allowing residents to return and reconstruction efforts to begin Naraha is the first of a number of towns in the area to have had its evacuation order removed 2016 earthquake edit On Tuesday November 22 2016 a magnitude 6 9 earthquake struck Japan 37 km 23 mi east southeast of Namie Fukushima Prefecture at a depth of 11 3 km 7 0 mi The shock had a maximum intensity of VII Very strong 38 14 people were injured and more than 1 900 homes briefly lost electricity 39 Though a warning of a possible tsunami of 3 m 9 8 ft in height was issued 40 a 60 cm 24 in wave was reported by NHK in the port of Onahama of Iwaki Fukushima a 90 cm 35 in wave hit Sōma Fukushima and another wave 1 m 3 ft 3 in in height struck the Fukushima Daiichi Nuclear Power Plant site after the 6 9 shock 41 Chief Cabinet Secretary Yoshihide Suga said that the third reactor s spent fuel pool cooling systems at Fukushima Daini had stopped as a result of the earthquake TEPCO later reported the restart of the spent fuel cooling system after only 100 minutes of stoppage 40 41 42 43 Decommissioning edit On 31 July 2019 the TEPCO board of directors decided to decommission the plant in response to local demands for a decision Decommissioning is expected to take more than 40 years to complete and will include moving spent nuclear fuel from spent fuel pools to on site dry cask storage 4 See also edit nbsp Japan portal nbsp Nuclear technology portal nbsp Energy portalNuclear power in Japan Fukushima Daiichi nuclear disaster List of boiling water reactors List of nuclear power plants in Japan Lists of nuclear disasters and radioactive incidents List of civilian nuclear accidentsReferences edit Tepco site Japanese Text and answers to the Fukushima II plant quiz permanent dead link Page 8 a b Japan initiates emergency protocol after earthquake Nuclear Engineering International March 11 2011 Archived from the original on March 14 2011 Retrieved March 11 2011 Gulati Ranjay Casto Charles Krontiris Charlotte July 2014 How the Other Fukushima Plant Survived Harvard Business Review Retrieved March 16 2017 a b Tepco declares Fukushima Daini for decommissioning World Nuclear News July 31 2019 Retrieved July 31 2019 Reactors in operation IAEA December 31 2009 Retrieved March 12 2011 a b Nuclear Reactor Maps Fukushima Daini Council for Security Cooperation in the Asia Pacific Archived from the original on February 15 2005 Retrieved March 14 2011 福島第二原子力発電所 設備の概要 東京電力 Tepco co jp Retrieved on 2013 09 06 原発の発電コスト Nuketext org October 28 2008 Retrieved March 16 2011 Tepco Annual Report 2003 Archived April 3 2012 at the Wayback Machine Page 24 Japanese WISE November 23 1990 Wise News Communique 342 WISE Archived from the original on March 26 2012 Retrieved July 4 2011 a b c Fukushima faced 14 metre tsunami World Nuclear News March 24 2011 Retrieved March 24 2011 The record of the earthquake intensity observed at Fukushima Daiichi Nuclear Power Station and Fukushima Daini Nuclear Power Station Interim Report TEPCO April 1 2011 a b c Insight to Fukushima engineering challenges World Nuclear News March 18 2011 Retrieved March 19 2011 a b IAEA update on Japan Earthquake March 12 2011 Retrieved March 12 2011 TEPCO March 12 2011 Press Releases TEPCO Retrieved March 12 2011 We sincerely pray for the repose of his soul asahi com March 12 2011 福島第二原発で作業員1人死亡 第一では2人が不明 Retrieved March 20 2011 The Sankei News March 12 2011 東電 協力会社社員3人死亡 2人不明 福島と茨城 Archived from the original on March 23 2011 Retrieved March 20 2011 ANN News March 12 2011 地震 第二原発 閉じ込められた従業員は死亡 Archived from the original on March 15 2011 Retrieved March 20 2011 Yomiuri Shimbun 2012 02 09 Ver 13S page 1 amp 2 Fukushima No 2 plant was near meltdown a b c d Cold shutdowns at Fukushima Daini World Nuclear News March 14 2011 retrieved March 14 2011 reports for reactor 1 reactor 2 and reactor 4 of Tokyo Electric received 11 50 JST Winter Michael Cooling system fails at 3 reactors at another Japanese nuclear plant USA Today March 11 2011 6 01 EST Chronology of Events at Fukushima Daini nuclear power station PDF TEPCO All Fukushima No 2 plant reactors safely halted March 15 2011 Archived from the original on March 18 2011 3 Week Update on Japan s Nuclear Crisis April 2 2011 Retrieved April 2 2011 IAEA Update on Japan Earthquake Retrieved March 16 2011 Japanese authorities have assessed that the loss of cooling functions in the reactor Units 1 2 and 4 of the Fukushima Daini nuclear power plant has also been rated as 3 All reactor Units at Fukushima Daini nuclear power plant are now in a cold shut down condition Japan nuclear safety agency says level 5 incident at Fukushima reactors No 1 2 3 raised from level 4 The Huffington Post Nuclear and Industry Safety Agency March 18 2011 東北太平洋沖地震による福島第一原子力発電所及び福島第二原子力発電所の事故 トラブルに対するINES 国際原子力 放射線事象評価尺度 の適用について Press release in Japanese Ministry of Economy Trade and Industry Retrieved March 18 2011 RPT TEPCO releasing pressure at one Fukushima reactor Reuters March 11 2011 World Nuclear News March 12 2011 Battle to stabilise earthquake reactors World Nuclear News Retrieved March 12 2011 Press release 11 TEPCO March 13 2011 Battle to stabilise earthquake reactors update 2 World Nuclear News March 12 2010 NHK WORLD English Archived from the original on April 2 2011 Retrieved March 30 2011 Smoke from Fukushima Daini nuclear plant Pilot information for Sendai Airport March 12 2011 Retrieved March 12 2011 Japan invokes 30km no fly zone around Fukushima plant more flights to north east Update 4 CAPA Centre for Aviation Retrieved on 2013 09 06 Kyodo News Fishermen to Tepco Don t release water Japan Times June 9 2011 p 1 Restoration plans for Fukushima area World nuclear news org 2012 09 04 Retrieved on 2013 09 06 M6 9 37km ESE of Namie Japan United States Geological Survey November 21 2016 Retrieved November 21 2016 Breslin Sean November 22 2016 Strong Japan Earthquake Produces Tsunami but Spares Major Damage The Weather Channel Retrieved November 23 2016 a b Fifield Anna November 22 2016 Tsunami warning for Japan s Fukushima coast after 6 9 magnitude earthquake The Washington Post Naha Japan ISSN 0190 8286 Retrieved November 23 2016 a b Japan earthquake sparks tsunami at Fukushima BBC News November 22 2016 Retrieved November 23 2016 TEPCO to study cooling system stoppage NHK World November 22 2016 Archived from the original on November 24 2016 Retrieved November 23 2016 Seismic activity continues off Fukushima NHK World November 23 2016 Archived from the original on November 24 2016 Retrieved November 23 2016 External links edit nbsp Wikimedia Commons has media related to Fukushima II Nuclear Power Plant Tokyo Electric Power Company 東京電力 Webcam showing Fukushima I Nuclear Power Plant Official site c o Tokyo Electric Company 東京電力 福島第一原子力発電所 TEPCO News Releases Tokyo Electric Power Company IAEA Alert Log International Atomic Energy Agency All Things Nuclear H2O project Extensive information about the events during and after the tsunami permanent dead link Retrieved from https en wikipedia org w index php title Fukushima Daini Nuclear Power Plant amp oldid 1184261352, wikipedia, wiki, book, books, library,

article

, read, download, free, free download, mp3, video, mp4, 3gp, jpg, jpeg, gif, png, picture, music, song, movie, book, game, games.