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Press Release: Turbine Inspection on Oskarshamn 1 Completed – New Time Schedule Established
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2011-12-19: Following the completion of the comprehensive turbine inspection of Oskarshamn 1 (O1) it may be established that the measures required will require more time than earlier planned. According to the new time schedule O1 will be back on the grid on 7 January.
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Press Release: Security of Supply Priority at Oskarshamn 3 – Interruption in Present Test Program
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2011-11-29: Oskarshamn 3 will as of the on-coming Wednesday afternoon interrupt its present test program in order to minimise the risk of operational disturbances during the high load period. The power will thus be reduced to approximately 1,300 MW gross, the level against which the facility so far has been tested. The remaining tests at full power will instead be realised as soon as the weather situation and the power need so permit.
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Press Release: Internal Investigation Indicates Development Needs – Shutdown of O1 Prolonged for Total Turbine Inspection
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2011-11-18: The operations management of Oskarshamn 1 (O1) has decided to get to the bottom of the problems with vibrations in the turbine facility which have caused the current shutdown of the facility. The decision comprises a thorough inspection which is estimated to last for about one month. With the same decisive approach an improvement work assignment has been initiated within the operating department. Its aim is to prevent human error in connection with the types of operational cases having occurred in connection with the testing of the implemented improvements in the turbine.
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Press Release: Operational Interruption at O1 Prolonged
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2011-11-16: When preparing the re-start of Oskarshamn 1 (O1) on late Tuesday evening a disturbance arose on the feed water system which entails a prolongation of the current operational interruption. Analyses and investigations will now be carried out in order to see whether there is any connection between this additional problem and the turbine vibrations which originally were the reason for the shutdown.
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Press Release: Unit Oskarshamn 3 has resumed operation
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2011-11-07: Around 9 p.m. on Saturday evening unit Oskarshamn 3 was again synchronized to the grid after a brief shutdown caused by a faulty set generator protection function.
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Press release: Operational disturbance at unit Oskarshamn 3 in connection with test run
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2011-11-04: On the night before Friday, the operation at unit Oskarshamn 3 was stopped in connection with that one of the generator protection functions was activated during a test performed on the generator. The unit responded exactly as expected during the occurred situation and the work with analysing the cause of the operational disturbance was immediately initiated.
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OKG’s stress tests are now public
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2011-11-02: The nuclear power plants’ reports regarding stress tests have now been submitted to the Swedish Radiation Safety Authority, SSM. In the summarizing public part of the report it can be established that owing to our consequence mitigation systems the Swedish nuclear power plants have the capability to withstand severe accidents without exposing the surroundings to hazardous releases.
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Press Release: The power uprate at unit Oskarshamn 2 is postponed until 2015
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2011-11-02: OKG’s board of directors decided on Tuesday evening that the implementation of the power uprate of unit Oskarshamn 2 will be postponed until 2015. The safety upgrade within the modernization work will however take place according to plan in 2013.
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Press Release: Unit Oskarshamn 2 synchronized to the grid this past weekend
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2011-10-31: Late on Sunday evening, unit Oskarshamn 2 was again synchronized to the grid. The unit was shut down on Sunday 23 October due to a small fire in the turbine facility, caused by an oil leakage.
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Press Release: Planned Operational Interruption at Oskarshamn 1
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2011-10-28: Through a planned operational interruption at Oskarshamn 1 (O1), the operations management hopes to come to terms with turbine vibrations, which for some time have shown a slight increasing trend. The unit is planned to be switched from the grid during the night preceding this Monday and following inspections and measures will re-start later in the week.
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Press Release: Turbine Measure to Be Taken on Oskarshamn 2
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2011-10-20: Early on Tuesday morning Oskarshamn 2 (O2) was restarted after its yearly maintenance shutdown. The power ascent has however been problematic due to turbine vibrations. These are due to the implemented modifications in the turbine system, which were recommended by the supplier. The operations management therefore decided on a minor operational interruption this Thursday, in order to re-balance the turbine.
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Renewal of OKG’s Environmental Impact Certificate
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2011-09-29: At the recurrent review performed at companies being environmentally certified OKG has been approved without any serious deviations and thus has received a renewed Environmental Impact Certificate.
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Press Release: Milestone in OKG’s History – Modernized Oskarshamn 3 delivers at New Maximum Output Level
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2011-09-23: During this Friday OKG made history. Oskarshamn 3 (O3) produced for the first time with the new maximum capacity since the comprehensive modernisation which has been performed on the facility.
– I am happy together with all those who in one way or the other have contributed to realising this milestone, Mr. Ingemar Engkvist, Managing Director, comments. The ambition is now of course to fulfil the current test program in order to be able to secure a stable supply capacity this on-coming winter at the highest possible output level.
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Press release: Unit Oskarshamn 3 back in operation after an operational disturbance
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2011-09-01: The electricity production at unit Oskarshamn 3 (O3) was resumed on the night till Thursday 1 September, after having attended to the faults that resulted in that the unit was temporarily shut down on 25 August.
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Press Release: Oskarshamn 3 Shutdown with Scram
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2011-08-25: At 13:34 hours Oskarshamn 3 (O3) was shutdown due to a fault in the feed-water system, a system which distributes water to the facility.
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Press Release: Prolonged Operational Interruption at Oskarshamn 2
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2011-08-23: The operational interruption at Oskarshamn 2 will be prolonged up until the yearly maintenance outage which will start on 18 September. The aim is to secure the power supply during the cold period this winter.
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Press Release: Oskarshamn 3 Resumed Its Production - Later Than Foreseen
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2011-06-30: Yesterday, on 28 June, Oskarshamn 3 (O3) resumed its electrical output following this year’s maintenance shutdown. The facility was foreseen to resume its production on Sunday 19 June, but due to problems at start-up with two valves as well as turbine vibrations the re-start was delayed.
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Press Release: Full Production Again at O1
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2011-06-13: At lunch-time on Sunday Oskarshamn 1 (O1) again could supply electricity to the power grid. The facility was taken out of operations on Thursday evening in order to conduct tests on the diesel engines.
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Press Release: Oskarshamn 1 Shut Down for Preventive Maintenance on Diesel Engines
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2011-06-10: Oskarshamn 1 (O1) was disconnected from the grid on Thursday evening in order to perform preventive maintenance on the diesel engines.
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Press Release: Yearly Maintenance Shutdown at Oskarshamn 3
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2011-05-23: Last Sunday, on 22 May, OKG commenced this year’s second maintenance shutdown, which is being carried out at Oskarshamn 3 (O3). In connection with this yearly outage a test was executed which entailed that the facility was disconnected from the grid already on Saturday 21 May. The unit’s maintenance shutdown is planned for a duration of 29 days in order to be in operation again on 19 June.
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Press Release: Successful Outage Completed at Oskarshamn 1
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2011-05-16: Late Sunday evening on 15 May Oskarshamn 1 (O1) was re-connected to the national grid after this year’s successful outage. Despite having been a very intensive shutdown with a great amount of additional work tasks, the original time schedule was kept more or less. The facility is estimated to reach full power output during Tuesday.
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Press Release: The annual outage initiated at unit Oskarshamn 1
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2011-04-18: Today, on Monday 18 April, the annual outage period at OKG is initiated with the outage at unit Oskarshamn 1 (O1). This year’s outage at unit O1 is fairly short and will last for approximately 23 days with a scheduled restart on 11 May.
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Press Release: Oskarshamn 2 in Operation Again
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2011-04-14: On Wednesday 13 April at 9:15 o’clock a.m. Oskarshamn 2 (O2) was turned to the grid again following a short service interruption. Full output in the power production was reached at 7:40 o’clock p.m. the same day, according to plan.
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Press Release: Oskarshamn 2 to Be Interrupted Temporarily for Service on Controle Valve
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2011-04-11: On Tuesday 12 April Oskarshamn 2 (O2) will conduct a planned operational interruption for service on a control valve to the high pressure turbine.
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Press Release: Oskarshamn 3 Has Resumed Its Operations
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2011-04-04: On Sunday afternoon, according to plan, Oskarshamn 3 (O3) was reconnected to the grid following an operational interruption of almost a week, where trouble shooting to take care of a steam flow valve and also the exchange of a fuel assembly was conducted.
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Press Release: Oskarshamn 3 to Be Interrupted Temporarily for Maintenance on Control Valve and Replacement of Fuel Assembly
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2011-03-24: This Thursday the operations management at Oskarshamn 3 decided on a one-week interruption of the electricity production in order to perform measures on one of the four valves controlling the steam flow to the conventional turbine equipment. In parallel the replacement of one fuel assembly is being planned. The operational interruption is estimated to take place between 28 March and 3 April.
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Press Release: Oskarshamn 3 in Operation Again Following Short Operational Disturbance
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2011-02-26: During last Friday Oskarshamn 3 resumed its power output following measures taken on the faults which caused the interruption of the unit during the night preceding last Tuesday.
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Press Release: Operational Disturbance at Oskarshamn 3
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2011-02-22: During the night towards 22 February Oskarshamn 3 (O3) was scrammed. The reason for the production loss is not yet established but trouble shooting and investigations are in progress.
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Press Release: Public Crisis Preparedness in Focus at Accident Training Centering on OKG
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2011-01-31: Starting on 2 February the public preparedness in a crisis situation will be trained from the starting point of a fictitious nuclear accident at OKG. The leadership of the training has devised a scenario which during two days and nights will create such major problems at OKG that the society’s other resources also will be put to serious tests. Totally around fifty different organizations with altogether nearly six thousand persons will be trained.
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Press Release: Oskarshamn 1 Producing Again Following Two Days of Operational Interruption
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2011-01-27: All according to the established time schedule Oskarshamn 1 (O1) was connected to the national power grid at 5 a.m. on Thursday 27 January. The reactor was manually removed from the grid two days earlier following the detection of an oil leak in the turbine facility.
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Press Release: Oskarshamn 1 Manually Interrupted – Restart this Thursday
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2011-01-25: On Tuesday 25 January the operational management at Oskarshamn 1 (O1) chose to remove the unit from the grid following an oil leak which was detected in the turbine facility. Restart is foreseen to be on Thursday 27 January.
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Press Release: The Production Year 2010 – Production Records despite Setbacks
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2011-01-17: – During the year 2010 OKG was subject to several production disturbances at Oskarshamn 1 and 3, together with prolonged maintenance outages primarily on Oskarshamn 3. At the same time several production records were broken during the year, Mr. Lars Thuring, Managing Director (MD) at OKG, says.
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Press Release: Last Saturday Oskarshamn 3 resumed its Production
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2011-01-10: On last Wednesday, 5 January, the reactor of Oskarshamn 3 (O3) was scrammed, as a safety precaution, following decreasing nitrogen gas pressure in the reactor containment. On last Saturday, 8 January, the facility could be restarted, following measures taken after implemented investigations on the cause.
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Press Release: Reactor trip at Oskarshamn 3
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2011-01-07: On 5 January at noon, the operations management at unit Oskarshamn 3 (O3) made the decision to stop the production. The reason for the decision to take the unit off the power grid was identified reduction of the nitrogen pressure in the containment. At this moment, planning is in progress regarding possible measures to be taken and unit Oskarshamn 3 is expected to be in operation again by Saturday 8 January.
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