Hokuriku Electric Power Company has announced an upward revision to its tsunami risk estimate for the Shika Nuclear Power Plant in Ishikawa Prefecture, following the Noto Peninsula earthquake two years ago. The new maximum expected tsunami height is now set at just over 12 meters, approximately 5 meters higher than the previous estimate [1].
This revision represents a significant change impacting the plant's safety measures and risk management. Hokuriku Electric plans to strengthen tsunami countermeasures, including the consideration of additional protective barriers and other safety enhancements [1]. The Nuclear Regulation Authority has indicated that it will need to review its safety inspections and regulatory responses for the Shika plant in light of the updated tsunami estimate [1].
The change may affect local residents, financial markets, and the insurance industry. There is increased attention on nuclear-related stocks and Hokuriku Electric's share price, with financial analysts noting that the higher tsunami estimate raises the hurdle for restarting operations and could exert short-term downward pressure on the stock [1]. However, the company's commitment to enhanced safety is seen as potentially restoring trust and reducing risk over the medium to long term [1].
Currently, Hokuriku Electric's share price is experiencing a slight adjustment. Market participants are closely monitoring the company's future regulatory responses, the scale of additional investments required, and the timing of any restart disclosures. The added costs for seismic and tsunami countermeasures and possible delays in resuming operations are cited as risk factors, prompting a cautious stance in investment decisions related to the company and the sector [1].
CONCLUSION
Hokuriku Electric's decision to raise the tsunami risk estimate for the Shika Nuclear Plant has introduced new uncertainties for investors, with short-term stock pressure and concerns over additional costs and operational delays. However, the company's proactive safety measures may support long-term confidence and risk mitigation. Market participants are expected to closely follow further regulatory and corporate disclosures.