Nuclear: Another reactor vessel over too tight (Doel)

[Christophe]

A problem at the Doel NPP?
Tuesday 07 August 2012 to 21h57

The 3 reactor of the Doel NPP is temporarily shut down. During a check, a possible defect in the reactor vessel was noted. The Federal Agency for Nuclear Control (FANC) has requested an additional investigation and shut down the reactor as a precaution, said Tuesday evening the Flemish channel vtm

The reactor has been shut down since early June for maintenance, said spokeswoman Electrabel, Lut Vande Velde. During this planned inspection, it was found that further examination was necessary. Pending the results of these reviews, it was decided not to restart the reactor, she said.

"A new method of analyzes of the vessel by means of ultrasonic sensors was carried out during the planned overhaul of the Doel 3 nuclear power plant. If the results of these analyzes are not yet fully established at this stage, it is already apparent that the ultrasonic sensors have detected on the tank the presence of very many indications that could be likened to potential cracks", indicates the FANC on its site.

Pending full results, the 3 reactor will remain at least until 31 next August, adds the FANC, which states that there is no danger for the population, workers and the environment, with the reactor stationary and the nuclear fuel discharged.

The 2 reactor at the Tihange plant will soon be shut down for a planned revision next September, adds FANC on its internal site.

The electricity manager, Elia, told Vtm TV news that there was no fear about electricity supply.

Levif.be, with Belga

Source: http://www.levif.be/info/actualite/belg ... 789634.htm

[Alain G]

"A new method of tank analysis using ultrasonic sensors

Am I dreaming?


It has been used for a long time in other areas such as pipeline welds and other areas and these cons come to discover this process!


I pity you to have such idlers!

[dirk pitt]

no, that's just the journalist with the con who just discovered this technique.

[Flytox]

"A new method of tank analysis using ultrasonic sensors

Am I dreaming?


It has been used for a long time in other areas such as pipeline welds and other areas and these cons come to discover this process!


I pity you to have such idlers!

"A new method Vessel analysis using ultrasonic sensors was performed during the planned revision of the Doel 3 nuclear power plant.

In the standardized vocabulary of control the word Method refers to "the family" of testing such as X-rays, Magnetic particle inspection, Penetrant testing, Eddy currents, Ultrasound, Acoustic emission, Barkausen noise ... The journalist certainly did not mean that Ultrasound testing was new.

AMHA this is a "new" control technique in the Ultrasound Method, but still uses ultrasound translators. When you have the time, the material, IT and human resources, you can set up much more sophisticated controls and "discover" new things ...

Afterwards, the article does not say whether it is an improvement in anomaly detection that has allowed this discovery, or whether the control has never been done properly before.

[Did67]

"the presence of very many indications which could be likened to potential cracks"

admirable phrase, which illustrates well the omerta around the nuclear!

"a walker with glasses and hat, striped suit and crocodile shoes carrying a machine gun that can be likened to a mafioso!"

[Flytox]

"the presence of very many indications which could be likened to potential cracks"

admirable phrase, which illustrates well the omerta around the nuclear!

"a walker with glasses and hat, striped suit and crocodile shoes carrying a machine gun that can be likened to a mafioso!"

+ 1;

[Obamot]

... especially since it does not detract from the main cause that the world of nuclear occult obviously. Which is the fact of the premature wear of the power plants, which can not - in terms of physics itself - withstand the heavy constraints that they are subjected to by exposure to radiation, over time ...

Inexorable extension of cracks:
(for example at the Mühleberg power plant, similar to Fukushima)


Source: ...>

They are currently installing "tie rods", a DIY which consists neither more nor less in noting that they can do nothing but try to reduce the development of cracks:...>Worse, the operators wanted to do without the controls on the welds !!!

... so they can only see the cracks and other degradations that are spreading and are well known in the BA environment. Real cancer of the materials.

Worse, they continue to hide their faces:

Events at the Fukushima nuclear power plant (Japan) in the spring of 2011 opened the nuclear debate in Switzerland.

Before we closed his mouth?

BKW aims for a long-term operation of the CNM as long as safety and profitability are guaranteed.

I would have sworn, however, that neither profitability (waste storage, material constraints, dismantling, etc.) nor security, could be guaranteed! Otherwise why would we have decided to leave the nuclear!

Small historical: while during this time in Parliament, one is worried about the tide of the reactor which flees:

We learned in October 2009 thata crack would have appeared on the tank of the reactor of the Mühleberg nuclear power plant. In other countries, this would have justified a shutdown of the reactor.

Why did the Federal Council not decide to stop the plant?

http://www.parlament.ch/f/suche/pages/g ... d=20095495

The Federal Council is responsible for:

- to reconsider its decision of 2009 and to withdraw from the Mühleberg nuclear power plant its unlimited license to operate over time. This plant must be decommissioned without delay;

- to oblige the federal authorities and the Bern Motor Forces to publish all the documents relating to the operational safety of the Mühleberg plant;

- to inform the population immediately about the information strategy and the evacuation plan in the event of an accident in Mühleberg.
http://www.parlament.ch/f/suche/pages/g ... d=20113264

The Federal Council is responsible for immediately closing the Mühleberg nuclear power plant, which is 40 years old.

Development
The Federal Council made the first impact immediately after the nuclear disaster in Fukushima, Japan, by ordering the five nuclear power plants in operation in our country to undergo a security check. It has long been known that Swiss nuclear power plants are not designed to withstand potential earthquakes. In 1999, the surveillance authorities had already demanded proof of their resistance to earthquakes. The results, released in 2007, show that the risk of seeing nuclear power plants hit by an earthquake is twice as high as previously thought. The supervisory authority required operators to consider a higher risk.
http://www.parlament.ch/f/suche/pages/g ... d=20113256

Meanwhile at the central ....:

During the annual 2011 review, the mantle of the reactor core of the Mühleberg Nuclear Power Plant (CNM) was inspected using a new control system for accurate measurement of crack depth. As a result, contrary to the assumptions made so far, no cracks are passing through the mantle of the reactor core. Otherwise, existing cracks have not spread, or very weakly.

https://kernenergie.bkw-fmb.ch/manteau- ... cteur.html

You're not the guys, the new techniques are just for the purpose of increasing the yield and ... minimizing the cracks: talking about those of the mantle while the big unresolved problem is that of the reactor vessel herself!!!



We live a great world!

[Christophe]

I see that we have the same opinion on the treatment of this information ...

For the "new" method do not search: it is a new method "in a radioactive environment"

[Flytox]

The conditions of Ultrasound control and access (congestion) to the surface for translators are unfortunately not specified. In this material and this thickness the US control is normally not the most problematic. Usually we are capable of an error of 1 even 2 mm (being nasty) which has certainly allowed to validate this control technique upstream to validate this piece.

And then, damn it! Here it is an error of 15 mm! Or the first measure was completely bogus .... or so it's the second
but there is at least one validation that is bogus.

[Alain G]

no, that's just the journalist with the con who just discovered this technique.

Sorry for the language I used but I'm just a little surprised that the nuke just discovered this process!



Does anyone know if it is the welds that are targeted or the metal (stainless steel) when knows that the weld creates tension that can crack with the temperature changes related to the operation of the reactor?