The AP via The Daily Star:
” TOKYO: An outside investigation team appointed by the operator of Japan’s damaged Fukushima nuclear plant said Thursday that an instruction from the company’s then-president to avoid using the term “meltdown” delayed the full disclosure of the status of three reactors.
Tokyo Electric Power Co. described the condition of the three reactors as less serious “core damage” for two months after a March 2011 earthquake and tsunami destroyed the plant.
The panel of three TEPCO-commissioned lawyers said the company used the milder term despite knowing that the damage far exceeded its meaning, because of the instructions by then-President Masataka Shimizu. The report said he was apparently under pressure from the Prime Minister’s Office, but that the panel did not find direct evidence of that.
TEPCO reported to the authorities on March 14, 2011, that the damage, based on a computer simulation, involved 25 to 55 percent of the fuel but did not say it constituted a “meltdown,” the report said. The company’s internal manual defined a “meltdown” as a core condition with damage exceeding 5 percent of the fuel.
In May 2011, TEPCO finally used the description after another computer simulation showed fuel in one reactor had almost entirely melted and fallen to the bottom of the primary containment chamber, and that the two other reactor cores had melted significantly.
TEPCO has been accused of softening its language to cover up the seriousness of the disaster. But the investigation found TEPCO’s delayed acknowledgement did not break any law.
In the 70-page report, the lawyers said Shimizu instructed his deputy not to use the word “meltdown” during news conferences immediately after the crisis when officials were peppered with questions about the reactor conditions. TEPCO’s vice president at the time, Sakae Muto, had used the phrase “possibility of meltdown” until March 14, 2011.
Video of a news conference that day shows a company official rushing over to Muto when he was about to respond to a question about the conditions of the reactors, showing him a memo and hissing into his ear, “The Prime Minister’s Office says never to use this word.”
Yasuhisa Tanaka, the lawyer who headed the investigation, said interviews of 70 former and current TEPCO officials, including Muto and Shimizu, showed that Muto had planned to use the word “meltdown” until he saw the memo, which has since not been found.
“Mr. Shimizu’s understanding was the term ‘meltdown’ could not be used without permission from the Prime Minister’s Office,” Tanaka told a news conference at TEPCO headquarters. “The notion that the word should be avoided was shared company-wide. But we don’t believe it was a cover-up.”
The Nuclear and Industrial Safety Agency, Japan’s nuclear regulatory unit at the time of the accident, was also reluctant to use the word. Two spokesmen were replaced between March 12 and 13, 2011, after suggesting meltdowns had occurred.
Government and parliamentary investigations have suggested officials, seeking to play down the severity of the Fukushima Dai-ichi crisis, resisted using the term. Tanaka said his investigation, which did not interview government officials, could not track down what exactly happened between Shimizu and the Prime Minister’s Office.
The Prime Minister’s Office has denied putting any pressure on TEPCO and the safety agency over language. But previous investigations of the accident show it demanded they coordinate with the office and unify approaches before making any announcement.
TEPCO has said the delay in confirming the meltdown didn’t affect the company’s emergency response at the plant. Although the reactors have been stabilized significantly, the company is still struggling with the plant’s decades-long decommissioning.
Delays in the announcement of meltdowns surfaced earlier this year in a separate investigation in which TEPCO acknowledged that a company manual had been overlooked, reversing its earlier position that it had no internal criteria for a meltdown. TEPCO has eliminated the definition of a meltdown from the manual that was revised after the Fukushima accident. ”
source
* * *
The Asahi Shimbun:
” Former government leaders vehemently rejected suggestions in a report that they were pulling the strings behind a suspected meltdown cover-up when the Fukushima nuclear disaster was unfolding in 2011.
The report, compiled by an investigation panel commissioned by Tokyo Electric Power Co., operator of the crippled nuclear power plant, said Masataka Shimizu, who was TEPCO president at the time of the accident, instructed employees not to use the term “meltdown,” leading to a delay in the official announcement.
But the report also implied that Shimizu was acting on orders from high up in the government.
Yukio Edano, who was chief Cabinet secretary of the Democratic Party of Japan-led government when the Great East Japan Earthquake and tsunami triggered the nuclear crisis on March 11, 2011, described the report as preposterous.
“As far as I know, it is unthinkable for government officials back then to ask TEPCO to do such a thing,” Edano, now the secretary-general of the opposition Democratic Party, told reporters on June 16.
He accused the panel of merely skimming the surface of the matter and sidestepping the truth behind the instructions to avoid using the term “meltdown.”
“It is utterly irresponsible for the panel to say that it did not uncover that (Shimizu) was instructed by who and what,” he said.
The third-party panel of legal experts said in the report released on June 16 that it can be assumed that Shimizu understood that he was requested by the prime minister’s office to seek its approval beforehand if the company were to announce the “meltdown.”
The panel also said it would be difficult to conclude that TEPCO’s delay in declaring the meltdown was a “deliberate cover-up.”
“Since TEPCO released information on radiation levels inside the reactors and other related data at that time, just not using the term meltdown cannot be described as an act of a deliberate cover-up,” the panel said.
TEPCO declared the meltdown at three reactors at the Fukushima No. 1 plant in May 2011, two months after it occurred.
According to the report, Shimizu entered the chief Cabinet secretary’s office, which is located at the prime minister’s office building, by himself on March 13, 2011. The following day, Sakae Muto, vice president of TEPCO, explained the conditions of the reactors at the plant.
During the news conference, Shimizu handed a memo to Muto through a TEPCO public relations official, telling him not to use the word “meltdown” on the instructions of the prime minister’s office, according to the panel.
Naoto Kan, who was prime minister at the time of the disaster, denied giving the instruction to TEPCO.
“I myself have never given directions to TEPCO not to use the expression ‘meltdown,’” Kan, a member of the Democratic Party, said in a statement.
One reason for the lack of clarity in the report is that Shimizu, who was interviewed twice for a total of four hours, said, “I do not remember very well” with regard to who gave what instructions.
Another TEPCO employee interviewed by the panel said Shimizu “was under tremendous pressure and must not have a detailed recollection.”
The panel interviewed about 60 former and current TEPCO officials but no government officials and bureaucrats who were involved in dealing with the crisis.
“Our authority to investigate is limited, and it is difficult (to uncover the entire truth) in such a short time,” said Yasuhisa Tanaka, the lawyer who headed the investigation.
Tanaka and another panel member, Zenzo Sasaki, a former prosecutor at the Tokyo District Public Prosecutors Office, were also in charge of the third-party investigation into the accident conducted in 2013.
That investigation, based on interviews of TEPCO officials, came under fire for “only arbitrarily presenting TEPCO’s argument that is convenient to the company.”
The findings by the latest panel showed TEPCO officials looking into the nuclear disaster were aware of Shimizu’s order not to use “meltdown,” but TEPCO’s in-house investigation team did not include it in its report in 2012, apparently believing it was not significant enough to mention.
“TEPCO’s efforts to share information inside the company were insufficient,” Tanaka said. “It lacked consideration for local governments, which should have been top priority.”
The revelation that Shimizu ordered the avoidance of “meltdown” fueled feelings of distrust toward TEPCO among local governments hosting TEPCO nuclear power plants.
“We are still in this stage of the investigation even five years after the accident,” said Toshitsuna Watanabe, mayor of Okuma, which co-hosts the crippled Fukushima plant.
Hirohiko Izumida, governor of Niigata Prefecture, home to TEPCO’s Kashiwazaki-Kariwa nuclear power plant, called for a further investigation to reveal the whole picture of the Fukushima disaster.
“We need to step up efforts to uncover what has not been sufficiently investigated before,” he said. “TEPCO, as an organization, should make a sincere response without hiding anything.”
The latest panel was established in March at the request of the Niigata prefectural government’s technology committee, which aims to determine why TEPCO waited until May 2011 to announce the triple meltdown.
TEPCO initially said it did not have the criteria for defining and determining a meltdown.
But it announced in February this year that the company “found” an in-house manual that explained whether a meltdown was taking place. ”
source
Japan Safety : Nuclear Energy Updates 