{"id":525,"date":"2003-09-04T17:15:46","date_gmt":"2003-09-04T08:15:46","guid":{"rendered":"http:\/\/www.cnic.jp\/english\/wordpress\/?p=525"},"modified":"2015-02-27T18:04:57","modified_gmt":"2015-02-27T09:04:57","slug":"significant-incidents-at-nuclear-power-plants-and-nuclear-fuel-facilities-in-2002","status":"publish","type":"post","link":"https:\/\/cnic.jp\/english\/?p=525","title":{"rendered":"Significant Incidents at Nuclear Power Plants and Nuclear Fuel Facilities in 2002"},"content":{"rendered":"\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Date<\/td>\nOperator\/ Owner<\/td>\nFacility Name<\/td>\nType<\/td>\nShort Description of Events<\/td>\n<\/tr>\n
Jan. 30<\/td>\nKEPCO<\/td>\nTakahama 4<\/td>\nPWR<\/td>\nDamage to steam generator tube found during periodic inspection.<\/td>\n<\/tr>\n
Mar. 4<\/td>\nTEPCO<\/td>\nKashiwazaki-Kariwa 1<\/td>\nBWR<\/td>\nReactor manually shut down due to coolant leak found caused by crack in shaft seal ring of recirculation pump motor<\/td>\n<\/tr>\n
Mar. 7<\/td>\nTohoku-EPCO<\/td>\nOnagawa 2<\/td>\nBWR<\/td>\nCoolant leak detected at condenser coolant flux measurement pipe during periodic inspection; 8cm crack found in welds of two measurement pipes.<\/td>\n<\/tr>\n
Mar. 31<\/td>\nJAPCO<\/td>\nTokai II<\/td>\nBWR<\/td>\nReactor automatically shut down due to transmission line stoppage caused by lightning; one of 185 control rods failed to insert into reactor core.<\/td>\n<\/tr>\n
Apr. 2<\/td>\nHokuriku-EPCO<\/td>\nShika 1<\/td>\nBWR<\/td>\nReactor manually shut down due to recirculation pump shaft oscillation during test operation.<\/td>\n<\/tr>\n
Apr. 3<\/td>\nJAPCO<\/td>\nTokai II<\/td>\nBWR<\/td>\nReactor manually shut down due to feedwater stopped during test operation; one control rod failed to insert into reactor core.<\/td>\n<\/tr>\n
Apr. 18<\/td>\nShikoku-EPCO<\/td>\nIkata 1<\/td>\nPWR<\/td>\nPrimary coolant pump shut down due to reactor containment sump water level increased alarm followed primary coolant pump shaft oscillation increased alarm during periodic inspection.<\/td>\n<\/tr>\n
Apr. 21<\/td>\nJNC<\/td>\nFugen<\/td>\nATR<\/td>\nReactor manually shut down due to level of noble gasses storage equipment monitoring system and level of off-gasses chimney monitoring system during test operation; leak found at two special fuel assemblies.<\/td>\n<\/tr>\n
Apr. 26<\/td>\nTEPCO<\/td>\nKashiwazaki-Kariwa 7<\/td>\nBWR<\/td>\nRadioactive leak found at two fuel assemblies during periodic inspection.<\/td>\n<\/tr>\n
May 5<\/td>\nTEPCO<\/td>\nKashiwazaki-Kariwa 3<\/td>\nBWR<\/td>\nReactor power manually reduced due to condenser vacuum rate lowered caused by turbine control equipment failed.<\/td>\n<\/tr>\n
May 14<\/td>\nTEPCO<\/td>\nKashiwazaki-Kariwa 7<\/td>\nBWR<\/td>\nCracks found at reactor internal recirculation pump propeller during periodic inspection.<\/td>\n<\/tr>\n
May 25<\/td>\nChubu-EPCO<\/td>\nHamaoka 2<\/td>\nBWR<\/td>\nReactor manually shut down due to water leak from residual heat removal system low pressure injection pipe isolation valve drain piping weld during reactor start-up operation.<\/td>\n<\/tr>\n
May 31<\/td>\nShikoku-EPCO<\/td>\nIkata 3<\/td>\nPWR<\/td>\nLeak found at heat exchange tube of feedwater heater during periodic inspection.<\/td>\n<\/tr>\n
Jun. 4<\/td>\nJNC<\/td>\nTokai site<\/td>\nPFFF<\/td>\nWorkers exposed to plutonium during glove exchange operation of glove box at plutonium fuel processing facility.<\/td>\n<\/tr>\n
Jun. 20<\/td>\nTohoku-EPCO<\/td>\nOnagawa 2<\/td>\nBWR<\/td>\nReactor manually shut down due to increased water leak from recirculation pump mechanical seal.<\/td>\n<\/tr>\n
Jun. 20<\/td>\nShikoku-EPCO<\/td>\nIkata 2<\/td>\nPWR<\/td>\nContainment vessel off-gasses monitoring system stopped due to filtration system being stuck.<\/td>\n<\/tr>\n
Aug. 22<\/td>\nTEPCO<\/td>\nFukushima I-3<\/td>\nBWR<\/td>\nCracks found at control rod drive pressurized water system piping around contaiment vessel penetration area.<\/td>\n<\/tr>\n
Aug. 23<\/td>\nTEPCO<\/td>\nKashiwazaki-Kariwa 3<\/td>\nBWR<\/td>\nCracks found at welds of core shroud on (made of SUS316L) lower region during periodic inspection; 360 degree crack found at outside surface of H6a position, and at inside surface of H7a position each.<\/td>\n<\/tr>\n
Sep. 2<\/td>\nTEPCO<\/td>\nFukushima II-2<\/td>\nBWR<\/td>\nReactor manually shut down due to level of off-gasses radiation monitoring system increased.<\/td>\n<\/tr>\n
Sep. 13<\/td>\nJNFL<\/td>\nRokkasho Repro.<\/td>\nRepro.<\/td>\nMistake found at connection of piping in ventilation system.<\/td>\n<\/tr>\n
Sep. 19<\/td>\nChubu-EPCO<\/td>\nHamaoka 4<\/td>\nBWR<\/td>\nCracks found at welds of core shroud (made of SUS316L) lower region during periodic inspection; 360 degree crack found at outside surface of H6a position, and at inside surface of H7a position each.<\/td>\n<\/tr>\n
Sep. 20<\/td>\nTohoku-EPCO<\/td>\nOnagawa 1<\/td>\nBWR<\/td>\nCracks found at welds of primary loop recirculation system piping(made of SUS316L) during periodic inspection.<\/td>\n<\/tr>\n
Sep. 20<\/td>\nChubu-EPCO<\/td>\nHamaoka 1\/3<\/td>\nBWR<\/td>\nIncident not available until Sep. 20, 2003; cracks found at welds of primary loop recirculation system piping (made of SUS316L) during former periodic inspection at Unit 1 and at Unit 3.<\/td>\n<\/tr>\n
Sep. 20<\/td>\nTEPCO<\/td>\nKashiwazaki-Kariwa 1<\/td>\nBWR<\/td>\nCracks found at welds of primary loop recirculation system piping (made of SUS316L) during inspection outage.<\/td>\n<\/tr>\n
Sep. 23<\/td>\nTohoku-EPCO<\/td>\nOnagawa 1<\/td>\nBWR<\/td>\nCracks found at welds of core shroud (made of SUS304L) middle and lower region during periodic inspection; cracks found at outside surface of H2 position and at outside surface of H6a position.<\/td>\n<\/tr>\n
Sep. 30<\/td>\nHokkaido-EPCO<\/td>\nTomari 1\/2<\/td>\nPWR<\/td>\nSignificant wastage found at maintenance boiler tubes.<\/td>\n<\/tr>\n
Sep. 30<\/td>\nTohoku-EPCO<\/td>\nOnagawa 1<\/td>\nBWR<\/td>\nWastage found at residual heat removal system welds during periodic inspection.<\/td>\n<\/tr>\n
Oct. 3<\/td>\nTEPCO<\/td>\nFukushima II-2<\/td>\nBWR<\/td>\nCracks found at welds of core shroud (made of SUS316L) middle region during planned inspection; cracks found at inside surface of H3 position and at inside and outside surface of H4 position.<\/td>\n<\/tr>\n
Oct. 5<\/td>\nTEPCO<\/td>\nKashiwazaki-Kariwa 1<\/td>\nBWR<\/td>\nCracks found at welds of core shroud (made of SUS316L) middle region during periodic inspection; cracks found at inside and outside surface of H3 position and at inside surface of H4 position.<\/td>\n<\/tr>\n
Oct. 11<\/td>\nTEPCO<\/td>\nFukushima I-4<\/td>\nBWR<\/td>\nCracks found at control rod drive pressurized water system piping around contaiment vessel penetration area.<\/td>\n<\/tr>\n
Oct. 13<\/td>\nTEPCO<\/td>\nFukushima I-4<\/td>\nBWR<\/td>\nCracks found at welds of core shroud (made of SUS316L) middle region during inspection outage; cracks found at inside surface of H4 position.<\/td>\n<\/tr>\n
Oct. 21<\/td>\nTohoku-EPCO<\/td>\nOnagawa 1<\/td>\nBWR<\/td>\nCracks found at core spray nozzles during periodic inspection.<\/td>\n<\/tr>\n
Oct. 23<\/td>\nTEPCO<\/td>\nFukushima II-3<\/td>\nBWR<\/td>\nCracks found at welds of core shroud (made of SUS316L) middle region during inspection outage; cracks found at inside surface of H3 position and at inside surface of H4 position.<\/td>\n<\/tr>\n
Oct. 23<\/td>\nJAPCO<\/td>\nTokai II<\/td>\nBWR<\/td>\nrecirculation flux control valve component lapsed and missed.<\/td>\n<\/tr>\n
Oct. 24<\/td>\nJNFL<\/td>\nRokkasho Repro.<\/td>\nRepro.<\/td>\nLeaks and cracks found at spent fuel storage pool welds.<\/td>\n<\/tr>\n
Oct. 30<\/td>\nChubu-EPCO<\/td>\nHamaoka 4<\/td>\nBWR<\/td>\nCracks found at welds of primary loop recirculation system piping (made of SUS316L) during periodic inspection.<\/td>\n<\/tr>\n
Oct. 31<\/td>\nTEPCO<\/td>\nFukushima II-4<\/td>\nBWR<\/td>\nCracks found at welds of core shroud (made of SUS316L) middle region during inspection outage; cracks found at inside surface of H3 position and at inside and outside surface of H4 position.<\/td>\n<\/tr>\n
Nov. 15<\/td>\nKEPCO<\/td>\nMihama 1<\/td>\nPWR<\/td>\nReactor manually shut down due to primary coolant valve leak rate increased; cracks found at sea water drain pipes.<\/td>\n<\/tr>\n
Nov. 25<\/td>\nJNFL<\/td>\nRokkasho Uranium Enrichment Plant<\/td>\nEnrich.<\/td>\nHomogenizing operation automatically stopped due to anti-overheat interlock system triggered by uranium hexafluoride cylinder temparature increased at RE-1 line homogeneous vessel.<\/td>\n<\/tr>\n
Nov. 26<\/td>\nTEPCO<\/td>\nFukushima II-4<\/td>\nBWR<\/td>\nCracks found at welds of primary loop recirculation system piping (made of SUS316L) during inspection outage.<\/td>\n<\/tr>\n
Dec. 3<\/td>\nTEPCO<\/td>\nKashiwazaki-Kariwa 2<\/td>\nBWR<\/td>\nCracks found at welds of primary loop recirculation system piping (made of SUS316L) during inspection outage.<\/td>\n<\/tr>\n
Dec. 5<\/td>\nTEPCO<\/td>\nKashiwazaki-Kariwa 2<\/td>\nBWR<\/td>\nCracks found at welds of core shroud (made of SUS316L) top, middle and lower region during planned outage; cracks found at outside surface of H1 position and 360 degree crack found at outside surface of H6a position and at inside surface of H7a position.<\/td>\n<\/tr>\n
Dec. 12<\/td>\nJAPCO<\/td>\nTuruga 2<\/td>\nPWR<\/td>\nRector manually shut down due to fire at turbine building; pipe insulation substace fired.<\/td>\n<\/tr>\n
Dec. 14<\/td>\nTohoku-EPCO<\/td>\nOnagawa 1<\/td>\nBWR<\/td>\nLeak found at insturmentaion nozzle during periodic inspection.<\/td>\n<\/tr>\n
Dec. 18<\/td>\nTEPCO<\/td>\nFukushima II-3<\/td>\nBWR<\/td>\nCracks found at welds of primary loop recirculation system piping (made of SUS316L) during inspection outage.<\/td>\n<\/tr>\n
Dec. 26<\/td>\nTEPCO<\/td>\nFukushima II-2<\/td>\nBWR<\/td>\nCracks found at welds of primary loop recirculation system piping (made of SUS316L) during inspection outage.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

TEPCO: Tokyo Electric Power Co.
\nJNC: Japan Nuclear Cycle Developent Institute
\nKEPCO: Kansai Electric Power Co.
\nTohoku-EPCO: Tohoku Electric Power Co.
\nJAPCO: Japan Atomic Power Co.
\nHokuriku-EPCO: Hokuriku Electric Power Co.
\nJNFL: Japan Nuclear Fuel Limited
\nShikoku-EPCO: Shikoku Electric Power Co.
\nChubu-EPCO: Chubu Electric Power Co.
\nHokkaido-EPCO: Hokkaido Electric Power Co.<\/p>\n

ATR: Advanced Thermal Reactor
\nBWR: Boiling Water Reactor
\nPWR: Pressurized Water Reactor
\nPFFF: Plutonium Fuel Fabrication Facility
\nRepro.: Spent Fuel Reprocessing Plant
\nEnrich.: Uranium Enrichment Plant<\/p>\n","protected":false},"excerpt":{"rendered":"

Date Operator\/ Owner Facility Name Type Short Description of Events Jan. 30 KEPCO Takahama 4 PWR Damage to steam generator tube found during periodic inspection. Mar. 4 TEPCO Kashiwazaki-Kariwa 1 BWR Reactor manually shut...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[17,4],"tags":[],"class_list":["post-525","post","type-post","status-publish","format-standard","hentry","category-accidentlist","category-data"],"acf":[],"_links":{"self":[{"href":"https:\/\/cnic.jp\/english\/index.php?rest_route=\/wp\/v2\/posts\/525","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cnic.jp\/english\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cnic.jp\/english\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cnic.jp\/english\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cnic.jp\/english\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=525"}],"version-history":[{"count":1,"href":"https:\/\/cnic.jp\/english\/index.php?rest_route=\/wp\/v2\/posts\/525\/revisions"}],"predecessor-version":[{"id":2331,"href":"https:\/\/cnic.jp\/english\/index.php?rest_route=\/wp\/v2\/posts\/525\/revisions\/2331"}],"wp:attachment":[{"href":"https:\/\/cnic.jp\/english\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=525"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cnic.jp\/english\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=525"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cnic.jp\/english\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=525"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}