Pipe Welding Workmanship Incident in the Fixed Fire-Extinguishing System Construction at Kashiwazaki-Kariwa Nuclear Power Station
First written in FY2022-Q3. 3 of 7 entries say "Worsened", first in FY2023-Q1. Latest entry: FY2026.
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- FY2026RestatedAnnual report
「Occurrence of nonconformities: Nonconformities, such as construction defects, may occur and result in increased costs. To ensure the consistent practice of the three actuals principle, we provide education and awareness programs for relevant personnel, while strengthening our quality assurance framework to prevent nonconformities before they occur.」
The company continues to disclose the risk of nonconformities, such as construction defects, and preventive measures as a general risk item, rather than progress on the individual Kashiwazaki-Kariwa case. - FY2024-Q2Remedial-work costs for Unit 6 and other expenses continue to weigh on quarterly profitAnnual report
「On the profit front, although revenue increased, operating profit came to ¥1,002 million, down 28.9% year on year, due to provisions for contract losses, including rework costs arising from welding defects in the welded joints of the fixed fire-extinguishing system piping at Unit 6 of the Kashiwazaki-Kariwa Nuclear Power Station, and the higher cost ratio resulting from the progress of projects accounted for under the cost recovery method.」
Provisions for loss on construction contracts related to remedial-work costs for welding defects at Unit 6 of the Kashiwazaki-Kariwa Nuclear Power Station continue to be a factor behind the decline in operating profit for the quarter. - FY2023AdvancedAnnual report
「Remedial work on Unit 7 has been completed, and the company will reliably carry out remedial work on Unit 6 after thoroughly implementing recurrence-prevention measures.」
The response progressed through completion of remedial work on Unit 7, continued remedial work on Unit 6 and an agreement on cost sharing with some subcontractors. - FY2023-Q3WorsenedAnnual report
「For the remedial-work costs for Unit 6 of the Kashiwazaki-Kariwa Nuclear Power Station, the company recorded ¥685 million as a provision for loss on construction contracts in cost of sales and ¥1,015 million as a provision for loss on damage compensation in extraordinary losses, according to the causes. In addition, because the company reached an agreement on cost sharing with some of the subcontractors that performed the work on Units 6 and 7, it recorded ¥1,680 million as a reversal of the provision for loss on damage compensation under extraordinary income.」
The company determined that remedial work was necessary for Unit 6 in addition to Unit 7 and recorded provisions totalling approximately ¥1.6 billion. Meanwhile, it also recorded a ¥1,680 million reversal following an agreement on cost sharing with some subcontractors. - FY2023-Q1WorsenedAnnual report
「For Unit 7 of the Kashiwazaki-Kariwa Nuclear Power Station, the company recorded additional costs for remedial work related to welding defects according to their causes, including ¥85 million as a provision for loss on damage compensation recognised as an extraordinary loss and ¥120 million as a provision for loss on construction contracts recognised in cost of sales. The company is holding discussions with the subcontractor that performed the work to seek an appropriate share of the costs. For Unit 6, the company is conducting an investigation in the same manner as for Unit 7 and will take appropriate action in consultation with the relevant parties if it determines that remedial work is necessary.」
Additional remedial-work costs arose in connection with welding defects at Unit 7 of the Kashiwazaki-Kariwa Nuclear Power Station, and the company recorded an ¥85 million provision for loss on damage compensation and a ¥120 million provision for loss on construction contracts. The investigation of Unit 6 is also continuing, and the company is at the stage of determining whether remedial work is necessary. - FY2022MaterialisedAnnual report
「Costs of remedial work related to welding defects at Units 6 and 7 of the Kashiwazaki-Kariwa Nuclear Power Station were recorded as a provision for loss on damage compensation and a provision for loss on construction contracts.」
Welding defects in piping at Units 6 and 7 of the Kashiwazaki-Kariwa Nuclear Power Station actually occurred, and the company recorded, among other items, a ¥1,622 million provision for loss on damage compensation for remedial-work costs. - FY2022-Q3First statedAnnual report
「During the third quarter of the current consolidated cumulative period, an issue arose involving the construction of pipe welds in the fixed fire-extinguishing system installation work for Units 6 and 7 of the Kashiwazaki-Kariwa Nuclear Power Station, for which the company had received the order. Details are as posted on the company's website dated 24 December 2021. The group's performance may be affected by costs incurred for site investigations and remedial work, among other expenses.」
The company disclosed as a new risk that an issue involving pipe welds had arisen in the fixed fire-extinguishing system installation work for Units 6 and 7 of the Kashiwazaki-Kariwa Nuclear Power Station, and that the cost burden from site investigations and remedial work could affect performance. The company states that the amount of the impact is currently difficult to estimate reasonably.