Ōma Nuclear Power Plant

{{Infobox power station

| name = Ōma Nuclear Power Station

| image = Kernkraftwerk Ōma.jpg

| image_caption = Ōma Nuclear Power Plant (2019)

| coordinates = {{coord|41|30|35|N|140|54|37|E|region:JP_type:landmark|display=inline,title}}

| country = Japan

| location = Ōma, Aomori

| owner =

| operator = Electric Power Development Company (J-Power)

| construction_began = {{start date|2010|05|07}}

| commissioned = 2030 (planned)

| decommissioned =

| status = U

| np_reactor_supplier =

| np_reactor_type = ABWR

| ps_cooling_source = Tsugaru Strait

| ps_cooling_towers =

| ps_units_decommissioned =

| ps_units_uc = 1 x 1,383 MW

| ps_units_planned =

| ps_electrical_capacity = 1,383

| ps_annual_generation =

| ps_units_operational =

| cost =

| website =

}}

The {{nihongo|Ōma Nuclear Power Station|大間原子力発電所|Ōma genshiryoku hatsudensho}} is a nuclear power facility under construction in Ōma, Aomori, Japan.

It will be operated by the Electric Power Development Company (J-Power).

The reactor would be unique for Japan in that it would be capable of using a 100% MOX fuel core, as requested by the 1995 decision by the Japanese Atomic Energy Commission.

The fuel would utilize surplus plutonium by blending it with natural uranium, reducing the total radioactivity of nuclear waste and dramatically reducing the waste's lifetime.

In 2008, J-Power announced a 2.5-year delay to allow for additional work to make the plant resistant to a strong earthquake, making the operation start date in November 2014.{{cite web|url=https://www.bloomberg.com/apps/news?pid=20601101&sid=a5hlasWtsTT4|title=J-Power Delays Oma Nuclear Plant Start by 2½ Years (Update2)|last=Nakayama|first=Michio|author2=Sato, Shigeru |website=Bloomberg News|date=November 11, 2008|accessdate=2008-11-19}}{{cite web|url=http://www.world-nuclear-news.org/NN-J_Power_reschedules_Ohma_start_up-1111084.html|title=J-Power reschedules Ohma start-up|date=November 11, 2008|work=World Nuclear News|accessdate=2008-11-19}}

Following the Fukushima Daiichi nuclear disaster of March 2011 construction at Oma was suspended for 18 months.

Work was resumed in October 2012.

In March 2013, the main reactor building was at its full height.{{cite news|url=http://www.japantimes.co.jp/news/2013/03/12/national/work-resumes-on-aomoris-new-oma-nuclear-plant/|title=Work resumes on Aomori's new Oma nuclear plant|date=March 12, 2013|newspaper=The Washington Post|accessdate=2014-02-04}}

In December 2014 J-Power applied for safety checks at the Oma nuclear plant, slated for startup in 2021.{{cite news |url= http://www.japantimes.co.jp/news/2014/12/16/national/j-power-forges-ahead-with-oma-nuclear-plant-despite-local-tensions |title= J-Power forges ahead with Oma nuclear plant despite local tensions |work= The Japan Times |date= 2014-12-16 |accessdate= 2017-03-03 |url-status= dead |archiveurl= https://web.archive.org/web/20170304040733/http://www.japantimes.co.jp/news/2014/12/16/national/j-power-forges-ahead-with-oma-nuclear-plant-despite-local-tensions |archivedate= 2017-03-04 }}

In September 2016, the commissioning date was postponed again, this time to late 2023 or early 2024.{{Cite web|url=http://www.world-nuclear-news.org/Articles/Further-delay-in-completion-of-Ohma-plant|title=Further delay in completion of Ohma plant - World Nuclear News}} In September 2018, the startup was postponed until 2026 to allow for expanded screening.{{Cite web|url=https://english.kyodonews.net/news/2018/09/b636c5eb33b7-extended-screening-pushes-back-mox-fuel-plant-construction-for-3rd-time.html|title=Extended screening pushes back MOX fuel plant construction for 3rd time}}

As of September 2024, the reactor's start has been postponed to 2030 due to delays in the commencement of safety tests.{{Cite web |script-title=ja: 大間原子力発電所　安全対策工事の開始６回目の延期 |trans-title=Ōma Nuclear Power Station - Sixth postponement of the start of safety measures work|url= https://www3.nhk.or.jp/lnews/aomori/20240906/6080023544.html|archive-url=https://web.archive.org/web/20240906180712/https://www3.nhk.or.jp/lnews/aomori/20240906/6080023544.html|archive-date=6 September 2024|website=NHK}}