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Topic/Matter Intersection

Topic:"Unplanned Outage" in M12516

Matter: NSP Maritime Link Inc. (NSPML) - 2025 Q3 Quarterly Report
4 passages 2 documents

Unplanned Outage across all matters →

N-1Q3 Report 2025 3 passages
1 & Labrador. NS Power continues to work with NLH to finalize the associated protocols. p. p. 10
1 Recommendation number 1 is closed. 1 & Labrador. NS Power continues to work with NLH to finalize the associated protocols. 30 a high enough system load. It is possible the test may shift to 2026 should these 31 conditions not occur. 1 Th...

AI summary The Labrador Island Link (LIL) has undergone planned and unplanned outages, with the latter occurring in October 2023 due to a failed switch. The commissioning of the LIL in 2023 has enabled the Muskrat Falls Project to fully operate, delivering significant benefits to NS Power customers. NS Power is reporting these benefits in accordance with the Board's directions in Decision M10206.

f) Forced Outages: p. p. 20
f) Forced Outages: • Pole 1 reactor hall emergency exit door limit switch was triggered, resulting in a pole trip. Although the door was closed and latched, it had buckled due to exposure to intense sunlight. Pole 1 was deblocked after the...

AI summary A pole trip occurred at Pole 1 due to a triggered emergency exit door limit switch, which buckled from intense sunlight exposure. The door was closed and latched, but a permanent corrective solution is still pending after the limit switch was readjusted and Pole 1 was deblocked.

2024 Forced Outages and Remedial Actions : p. p. 27
2024 Forced Outages and Remedial Actions : • On May 22, 2024, Pole 1 was offline for opportunistic warranty work as NLH transfers were not scheduled. Bi- pole outage occurred during 'Neutral Isolate' switching sequence that was required to...

AI summary On May 22, 2024, Pole 1 was taken offline for warranty work, leading to a bi-pole outage during a 'Neutral Isolate' switching sequence. The outage was caused by a timing algorithm in the switching sequence logic, which triggered a protection trip to both poles. A software change was implemented and tested on May 27, 2024.

100552Board Letter re: Accepted as filed and requesting further updates 1 passage
M12516 & M12627 – NSP Maritime Link Inc. – Q3 & Q4 2025 Quarterly Reports p. p. 0
spring helicopter inspection of the overhead transmission was completed in May. In the Q4 report, NSPML stated that the company completed a second helicopter inspection of the Newfoundland and Labrador transmission lines, and that the insp...

AI summary NSPML completed helicopter inspections of transmission lines and site visits by an independent engineer, noting operational status and some deficiencies. The Labrador Island Link test was postponed to 2026, and several outages occurred on the link in late 2025, including an unplanned outage due to a failed switch.

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