Hamaoka Nuclear Plant Restart in Jeopardy Amid Data Falsification Scandal at Chubu Electric Power

Chubu Electric Power announced on the 5th that it had submitted inappropriate data concerning the evaluation of seismic motion to the Nuclear Regulation Authority (NRA) during the review process for the restart of Hamaoka Nuclear Power Plant Units 3 and 4, which are currently suspended. The company's president and other executives held an emergency press conference to explain the situation.

This inappropriate incident involves suspicions that seismic motion was evaluated using methods that differed from those explained to the NRA. Specifically, it is alleged that, in order to "underestimate" the magnitude of the anticipated seismic shaking, "a wave not closest to the average was intentionally selected as the representative wave." This practice lacks scientific validity and is viewed as an act that undermines the very foundation of safety evaluation.

In response to this situation, the Nuclear Regulation Authority has suspended its review of Hamaoka Nuclear Power Plant Units 3 and 4 since December 22 last year and plans to discuss this misconduct at its regular meeting on the 7th. Chubu Electric Power has expressed its intention to establish a third-party committee to fully investigate the problem.

Following this announcement, a barrage of harsh criticism has erupted on social media, with comments such as "This happens because they're pushing for a restart at all costs," "Lowest standards of integrity," and "Forgery and fabrication." Chubu Electric Power is already facing lawsuits regarding residents' rights to life and personal rights, and just last November, 20 instances of inappropriate procedures in nuclear plant construction were discovered. This latest issue concerning seismic data has further deepened distrust in the company's corporate ethics and commitment to safety. Voices are calling for "a fraudulent constitution that compromises safety assurance" and even for "decommissioning," making an early restart an extremely difficult prospect.

The arbitrary manipulation of data related to the safety of nuclear facilities is an extremely malicious act, equivalent to "falsification." Chubu Electric Power faces a long and arduous path to regain public trust.

The context

The Hamaoka Nuclear Power Plant, operated by Chubu Electric Power, is located in Shizuoka Prefecture, Japan, a region known for its high seismic activity and proximity to a major tectonic plate boundary. Following the devastating Fukushima Daiichi nuclear disaster in March 2011, all units at Hamaoka were ordered to shut down by then-Prime Minister Naoto Kan due to the plant's exceptionally high seismic risk. Since then, Chubu Electric Power has been seeking approval from the Nuclear Regulation Authority (NRA) for the restart of its reactors, a process that requires meeting stringent new safety standards.

The NRA is an independent regulatory body established after the Fukushima disaster to oversee nuclear safety in Japan. Its reviews are crucial for any plant seeking to resume operations. Seismic evaluation is a particularly critical component of these reviews, especially for a plant like Hamaoka. The alleged deliberate manipulation of seismic data, an act described as "falsification," represents a severe breach of trust and a direct challenge to the fundamental principles of nuclear safety. This incident comes amidst ongoing public skepticism towards nuclear power in Japan and growing pressure on utilities to prioritize safety and transparency.