South-Ukraine NPP: Info. on Operation, Radiological Situation

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Discussion Overview

The discussion revolves around the operation and radiological situation of the South-Ukraine Nuclear Power Plant (NPP) following a transformer fire incident on January 15, 2015. Participants explore the implications of the fire, its causes, and the overall safety and operational status of the plant.

Discussion Character

  • Technical explanation
  • Debate/contested

Main Points Raised

  • Post 1 reports that the transformer fire did not affect the operation of the South-Ukraine NPP and that the radiological situation remained unchanged, with background radiation levels consistent with natural levels.
  • Post 2 provides details on the firefighting efforts, noting that there were no reported casualties and that multiple units of firefighting equipment were deployed.
  • Post 3 mentions that transformer fires are relatively common and not necessarily linked to the nuclear operations of the plant.
  • Post 5 raises a question about whether the transformer issues are recurring and speculates on possible bypassing of safety measures and insufficient oil analysis.
  • Post 6 echoes the inquiry about transformer issues, suggesting a potential common mode problem and referencing similar incidents at another nuclear power plant.

Areas of Agreement / Disagreement

Participants express differing views on the implications of the transformer fire, with some acknowledging the commonality of such incidents while others speculate on the operational practices that may have contributed to the event. There is no consensus on the underlying causes or future implications of the transformer issues.

Contextual Notes

The discussion includes assumptions about the operational protocols at the NPP and the nature of transformer issues, which remain unresolved. Specific details about the transformer’s condition and the plant's operational history are not fully explored.

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INFORMATION NOTICE ON SOUTH-UKRAINE NPP OPERATION:

On January 15, 2015, 22:03 Kyiv time, the South-Ukraine NPP (SU NPP) АТ-1 grid automatic transformer was tripped by the electrical protection system, with subsequent conflagration.

The fire was extinguished at 23:42 Kyiv time, January 15, 2015.

The disturbance did not impact the operation of SU NPP power units. The NPP’s radiological situation remained unchanged.

The background radiation at the South-Ukraine NPP industrial site remains at the level of natural background radiation, as registered before the start-up of the nuclear power plant, and amounts to 11,4 µR/h.

The amount of radioactive materials released into the environment does not exceed the established permitted levels.

Information. The South-Ukraine NPP is located on the banks of Pivdennyi Buh river in a town of Yuzhnoukrayinsk, Mykolayiv region, and is a Separated Subdivision of the State Enterprise “National Nuclear Energy Generating Company “Energoatom”. The NPP belongs to the South-Ukraine Power Complex.

The Power Complex consists of the following facilities: South-Ukraine NPP (3 power units of VVER-1000 type to the total installed capacity of 3000 MW), Oleksandrivka HPS on Pivdennyi Buh river (2 hydro-units to the total installed capacity of 11,5 MW) and Tashlyk HPSPP (Phase 1 commissioned: 2 hydro-units to the total electrical capacity of 320 MW in generation mode; Phase 2 under construction: hydro-unit № 3).
http://www.energoatom.kiev.ua/en/press/nngc/40921-povdomlennya_pro_robotu_yujnoukransko_aes/
 
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Engineering news on Phys.org
CEO of South-Ukrainian NPP gave the details on the fire station:

the victims and the victims at the time of the message, the number of dead and injured is not.

To extinguish the fire was drawn 16 units of special fire fighting equipment and 125 personnel of the PRNG 27 1 GPSO State in Mykolaiv oblasti._Na fire extinguishing Posted: 1 powder master stream nozzle, 2 manual powder barrel, the barrel 3 GPS-600, six barrels of water "And "and 2 water barrel" B

https://translate.google.ru/translate?hl=ru&sl=ru&tl=en&u=http%3A%2F%2Fglavcom.ua%2Fnews%2F263266.html
 
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Transformer fires are not that uncommon and aren't related to the nuclear side of the plant.
 
that's right.
however, I want to warn the Russian slander in the future. :)
 
Is this the same unit which has been tripping due to transformer issues?

I'm speculating they might have bypassed transformer trips and didn't do sufficient oil analysis to determine if the transformer was good or not. Or maybe a common mode problem with transformers (unlikely but possible)Edit: different site/unit
 
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Hiddencamper said:
Is this the same unit which has been tripping due to transformer issues?

I'm speculating they might have bypassed transformer trips and didn't do sufficient oil analysis to determine if the transformer was good or not. Or maybe a common mode problem with transformers (unlikely but possible)
There were events at Zaporozhiya, Unit 3 nuclear power plant tripped on 28 November, and at Unit 6 in December. The current event deals with South Ukraine Unit, which apparently had transformer malfunction.

http://www.energoatom.kiev.ua/en/press/nngc/40921-information_notice_on_southukraine_npp_operation/

http://www.world-nuclear-news.org/R...outh-Ukraine-plant-extinguished-16011501.htmlDaily status of Ukraine NPPs (thanks to a.ua.)
http://www.snrc.gov.ua/nuclear/en/publish/category/36180
 
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Thanks!
 
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http://www.snrc.gov.ua/nuclear/en/publish/article/268022