On May 8, 2026 at 04:24, the reactor at Mihama Power Plant Unit 3 was manually shut down. In response to an alarm indicating a large temperature difference in the upper and lower parts of the high-pressure turbine compartment, the team confirmed a steam leak and took prompt action. There was no radiological impact on the environment.<\/p>\n","protected":false},"comment_status":"open","ping_status":"closed","template":"","meta":{"Ticker":"","DATE":"","longName":"","company_name_ja":"","fullTimeEmployees":0,"address":"","phone":"","website":"","industry":"","sector":"","regularMarketPrice":0,"financialCurrency":"","marketCap":0,"fiftyTwoWeekLow":0,"fiftyTwoWeekHigh":0,"epsTrailingTwelveMonths":0,"epsForward":0,"bookValue":0,"totalRevenue":0,"OperatingIncome":0,"operatingMargins":0,"NetIncome":0,"profitMargins":0,"ebitda":0,"trailingPE":0,"forwardPE":0,"priceToBook":0,"returnOnEquity":0,"recommendationMean":0,"recommendationKey":"","targetMeanPrice":0,"numberOfAnalystOpinions":0,"analyst_earnings_data":"","dividendRate":0,"dividendYield":0,"payoutRatio":0,"totalEsg":0,"environmentScore":0,"socialScore":0,"governanceScore":0,"title":"","providerPublishTime":"","link":"","longBusinessSummary":"","longBusinessSummary_ja":"","quarterly_revenue":0,"quarterly_net_income":0,"quarterly_operating_profit":0,"enterprise_value":0,"company_officer_1_name":"","company_officer_1_title":"","company_officer_2_name":"","company_officer_2_title":"","company_officer_3_name":"","company_officer_3_title":"","company_officer_4_name":"","company_officer_4_title":"","company_officer_5_name":"","company_officer_5_title":"","company_officers_update_time":"","get_dividend_history_year1":0,"get_dividend_history_year2":0,"get_dividend_history_year3":0,"get_dividend_history_year4":0,"get_dividend_history_year5":0,"get_dividend_history_year6":0,"get_dividend_history_year7":0,"get_dividend_history_year8":0,"get_dividend_history_year9":0,"get_dividend_history_year10":0,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"jir_stock_code":"9503","jir_company_name":"Kansai Electric Power Company, Incorporated","jir_importance":"\u2605\u2605\u2605\u2606\u2606","jir_publication_date":"2026-05-08","jir_source_link":"https:\/\/japanir.jp\/wp-content\/uploads\/2026\/05\/9503-20260508-01.pdf","jir_short_summary":"On May 8, 2026 at 04:24, the reactor at Mihama Power Plant Unit 3 was manually shut down. In response to an alarm indicating a large temperature difference in the upper and lower parts of the high-pressure turbine compartment, the team confirmed a steam leak and took prompt action. There was no radiological impact on the environment.","jir_summary":"### Overview of the Event\nAt 04:08 on May 8, 2026, an alarm indicating a large temperature difference in the upper and lower parts of the high-pressure turbine compartment was triggered at Mihama Power Plant Unit 3 (operating under constant rated thermal output). The operator confirmed a steam leak from around the high-pressure turbine area. The reactor was manually shut down at 04:24, and by 04:43, it was confirmed that the steam leak had stopped. Further investigation into the cause is planned.\n\n### Impact and Future Responses\nThis incident involved a steam leak from the secondary system, with no radiological impact on the environment. The company will promptly disclose any findings that could affect earnings or require public disclosure.","jir_financial_highlights":"Manual Reactor Shutdown Time: 2026-05-08 04:24 (Unknown)\nSteam Leak Confirmation Time: Around 2026-05-08 04:10 (Unknown)\nSteam Leak Stop Confirmation Time: 2026-05-08 04:43 (Unknown)","jir_category":"","jir_hashtags":"#KansaiElectric, #ReactorShutdown, #GeneralIR","jir_key_figures":"Manual Reactor Shutdown Time: 2026-05-08 04:24\nSteam Leak Confirmation Time: Around 2026-05-08 04:10\nSteam Leak Stop Confirmation Time: 2026-05-08 04:43","jir_meta_title":"\u3010Kansai Electric Power\u3011Manual Reactor Shutdown at Mihama Power Plant Unit 3\uff5cMay 2026","jir_meta_description":"Kansai Electric Power announced on May 8, 2026, that the reactor at Mihama Power Plant Unit 3 was manually shut down due to a steam leak, with no radiological impact on the environment. Further investigation into the cause is planned.","jir_og_title":"\u3010Kansai Electric Power\u3011Manual Reactor Shutdown at Mihama Power Plant Unit 3\uff5cMay 2026","jir_og_description":"On May 8, 2026, the reactor at Mihama Power Plant Unit 3 was manually shut down due to a steam leak. There is no environmental radiological impact.","jir_og_image_url":"\/assets\/og\/company-general_ir.jpg","jir_chart_data_collection":"[]","ir_related_company":7311,"ir_release_date":"","ir_type":"","ir_is_new":false,"ir_document_url":"","jir_ir_type":"general_ir","footnotes":""},"sector":[],"importance":[],"class_list":["post-45356","ir_release","type-ir_release","status-publish","hentry"],"yoast_head":"\n