Antinuclear

Australian news, and some related international items

The stress corrosion problem could be affecting all of France’s nuclear reactors

 Nuclear: the stress corrosion phenomenon could affect all of France’s reactor models.
Four additional reactors, including one of 900 megawatts (MW), could be affected by the “stress corrosion” phenomenon detected on portions of auxiliary piping in the primary circuit of certain EDF nuclear reactors.

This announcement is part of the review of certain welds initiated at the end of 2020 and which should be completed in 2024. The company is continuing its discussions with the Nuclear Safety Authority (ASN) “on the overall strategy of controls, expertise and treatment of this phenomenon”.

On April 14, when updating its information note on the subject, EDF announced that “indications were detected during the performance of non-destructive ultrasonic testing” on portions of the pipes of the B3 reactors at Chinon (Indre-et-Loire), reactor 3 at Cattenom (Moselle), reactor 2 at Flamanville (Manche) and reactor 1 at Golfech (Tarn-et-Garonne).

The company is continuing its investigations to characterize the nature and origin of the problem. The discovery of these signs of stress corrosion in Chinon marks a turning point, since it is the first time that a 900 megawatt (MW) reactor is concerned. If the indications are confirmed, the 33 reactors in this series could be affected.

Until now, the stress corrosion phenomenon was limited to more powerful and recent reactors. Initially, the problem was detected, at the end of 2020, on the four reactors of the N4 series, with a power of 1,450
MW: reactors 1 and 2 of the Civaux power plant (Vienne) and reactors B1 and B2 of Chooz (Ardennes). EDF had been forced to shut them down to assess and replace the damaged sections.

In this case, the stainless steel near the welds concerned showed cracks created by a corrosion phenomenon which simultaneously involves the material and its intrinsic characteristics, mechanical stresses and the aggressive nature of the fluid in circulation.

Actu Environnement 28th April 2022

https://www.actu-environnement.com/ae/news/nucleaire-corrosion-sous-contrainte-tous-modeles-reacteurs-39539.php4

May 2, 2022 Posted by | Uncategorized | Leave a comment

Plastic pollution accelerating the consequences of climate change in Canada’s Arctic, according to new research

Plastic pollution accelerating the consequences of climate change in Canada’s Arctic, according to new research

As Canada’s Arctic continues to accumulate plastic, and climate change takes its toll on northern environments and communities, experts have evidence to suggest each threat is exacerbating the other, according to a recent paper published in Nature this month.

May 2, 2022 Posted by | Uncategorized | Leave a comment

Scientists: Japan’s Plan To Dump Nuclear Waste Into The Pacific Ocean May Not Be Safe — Fukushima 311 Watchdogs

University of Hawaii Kewalo Marine Lab Director Robert Richmond is worried about the wastewater discharge on marine life.  April 25, 2022 A panel of scientists has identified critical gaps in the data supporting the safe discharge of wastewater into the Pacific. Independent scientists are questioning Japan’s plans to dump just over 1 million tons of […]

Scientists: Japan’s Plan To Dump Nuclear Waste Into The Pacific Ocean May Not Be Safe — Fukushima 311 Watchdogs

May 2, 2022 Posted by | Uncategorized | Leave a comment

IAEA Releases First Report on Safety of Planned Water Discharge from Fukushima Daiichi Site — Fukushima 311 Watchdogs

April 298, 2022 The International Atomic Energy Agency (IAEA) Task Force, which is reviewing Japan’s policy to discharge treated water from the Fukushima Daiichi nuclear power station against relevant international safety standards, today released its first report. The report summarizes the overall progress in the technical preparations for the water discharge. It compiles the initial […]

IAEA Releases First Report on Safety of Planned Water Discharge from Fukushima Daiichi Site — Fukushima 311 Watchdogs

May 2, 2022 Posted by | Uncategorized | Leave a comment