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2014年5月22日 (木)


May 21, 2014
EDITORIAL: Startling Fukushima testimony raises grave questions

When faced with a life-threatening crisis, humans do not necessarily behave according to set rules. Some will do anything to save their skins. Without factoring in this possibility, is it ever possible to design something that is guaranteed to be safe?

We raise the issue because of a document that recently came to light. It is a record of statements made by Masao Yoshida, who was the manager of the Fukushima No. 1 nuclear power plant at the time of the March 2011 disaster. Yoshida died last July of esophageal cancer.
This valuable document covers exchanges Yoshida made when he was questioned by the government's Investigation Committee on the Accident at the Fukushima Nuclear Power Stations of Tokyo Electric Power Co.

The document begs a fundamental question: Is it right to entrust operations of nuclear power plants to electric power companies that are private enterprises?

According to the document, Yoshida said that on March 15, four days after the Great East Japan Earthquake and tsunami crippled the Fukushima No. 1 plant, fears were being voiced that the plant's No. 2 reactor containment vessel was damaged or destroyed. At that most critical juncture, according to the document, about 90 percent of plant workers defied Yoshida's orders and fled to the Fukushima No. 2 plant, about 10 kilometers away, to seek temporary refuge.

Doubts have always existed about the efficacy of disaster response measures at nuclear power plants. Would any utility really order its workers to risk their lives and keep performing their duties? How many workers would the utility be able to continue to secure during an accident? At Fukushima, these questions were no longer just theoretical.

The safety of commercial nuclear power plants today can be maintained only if plant operators deal appropriately with any mishap. The more serious the situation, the more people are needed to contain the crisis. But unlike Self-Defense Forces personnel, police officers and firefighters, who are all special-status government workers, nuclear power plant operators are private-sector workers.

The 50 or so workers who stayed at the Fukushima No. 1 plant while the crisis unfolded came to be called the "Fukushima 50" and were lauded around the world for their heroic dedication. But there is no guarantee such heroism will come into play when the next nuclear crisis occurs. The document raises grave questions.

Yet, Shunichi Tanaka, chairman of the Nuclear Regulation Authority, was reportedly not even aware of the document's existence. We find it extremely hard to understand that the head of this organization, created to prevent a recurrence of nuclear crisis, was not familiar with all the details from the outset of the Fukushima disaster.

The possibility of plant workers deserting en masse during a crisis was not even raised during discussions last year on establishing new regulatory standards for nuclear power plants.

Yotaro Hatamura, an expert in the science of failures and former chairman of the government's investigation committee on the Fukushima accident, stated in the overview of the investigation report: "Whatever may happen will happen. Whatever is thought to never happen will also happen." Has nobody heeded Hatamura's warning?

The government's investigation committee interviewed 772 individuals in connection with the Fukushima disaster. There must be many valuable opinions that have yet to be made public.

TEPCO must reveal every aspect of the mass desertion, and waste no time in doing so. The utility cannot be entrusted with nuclear power plant operations so long as it refuses to face the issue head-on.

For its part, the government should disclose all investigation committee materials to the public and make every effort to ensure that people learn lessons from the Fukushima accident. In the absence of any such effort, we firmly oppose the restart of reactors that are currently off-line.

--The Asahi Shimbun, May 21


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