How close is Plant Vogtle Unit 3 to being operational?

Power-ascension testing for Unit 3 is nearly complete, standing at approximately 95%. The unit has operated as designed during the testing sequence, but the remaining pre-operational testing and start-up activities are critical for its eventual commercial operation.

Are there any other risks or potential issues that could affect the Unit 3 schedule or costs?

Yes, Southern Co. and Georgia Power explicitly state that ongoing or future challenges could impact the schedule and costs. These include potential issues with managing contractors and vendors, cost escalation due to inflation, the inherent complexities of new technology, and the possibility of new challenges being identified during continued testing which may require engineering changes or remediation.

Has this delay impacted Plant Vogtle Unit 4?

This specific 8-K filing focuses on Plant Vogtle Unit 3. While the report acknowledges that challenges at Unit 3 could affect costs and schedules, it does not provide specific details on the status or potential impact to Unit 4 in this filing. Investors should refer to other filings for updates on Unit 4.

SOUTHERN CO 8-K SEC Disclosure

Q: What is the main reason for the delay in Plant Vogtle Unit 3's in-service date?

The primary reason for the revised projected in-service date to July 2023 is the identification and ongoing remediation of a degraded hydrogen seal in the main generator during the start-up and pre-operational testing phase. This issue has also necessitated a planned maintenance outage.

Summary

Southern Co. (SO) has filed an 8-K to report an update on the in-service date for Plant Vogtle Unit 3, operated by its subsidiary Georgia Power. The company announced that due to the identification and remediation of a degraded hydrogen seal in the main generator during start-up testing, the projected in-service date for Unit 3 has been pushed to July 2023. This is a slight delay from previous expectations, with power-ascension testing now approximately 95% complete. The company acknowledges that further operational challenges, including those related to new technology, contractor management, and potential cost escalations, could still impact the schedule and costs. While Unit 3 has operated as designed during testing, the successful completion of remaining pre-operational testing and start-up remains contingent on continued progress and the absence of unforeseen issues. Investors should monitor future updates closely, as the ultimate outcome of these matters and potential further impacts on cost and schedule are not yet determinable.

Key Highlights

1Georgia Power projects a July 2023 in-service date for Plant Vogtle Unit 3.
2A degraded hydrogen seal in the main generator was identified during start-up and pre-operational testing.
3Remediation of the hydrogen seal and planned maintenance outage have led to the revised in-service date.
4Power-ascension testing for Unit 3 is approximately 95% complete.
5The company warns of potential further schedule delays and cost increases due to ongoing or future challenges, including contractor management and inflation.
6Challenges may arise from the use of new technology within the plant's systems.
7The ultimate outcome of these matters cannot be determined at this time.

SOUTHERN CO 8-K Report, Corporate Update (Jun 16, 2023)

Summary

Key Highlights

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