The Nuclear Regulation Authority on Wednesday revised its disaster mitigation guidelines compiled in light of the Fukushima crisis by adding criteria for evacuation and other protective actions against radiation exposure.
According to the revised guidelines, people living within a 5-km radius of a nuclear power plant will be given iodine tablets, which help prevent thyroid cancer, ahead of time so they can promptly take the pills in the event of a fallout crisis.
People living outside the 5-km zone, meanwhile, will be ordered to evacuate if a radiation dose of 500 microsieverts per hour is detected, a tougher criteria than the International Atomic Energy Agency’s benchmark of 1,000 microsieverts.
Read the rest of the story: Nuclear agency updates disaster mitigation rules.
The quake fault running under reactor 2 at the Tsuruga nuclear power plant in Fukui Prefecture is probably active, a panel from the Nuclear Regulation Authority stated in a draft report Monday, effectively condemning the two-reactor complex.
The report, compiled from the panel’s search for potentially active faults at the Tsuruga plant, is a heavy blow to Japan Atomic Power Co., which may have to scrap the reactor at great cost.
“If new knowledge is obtained, the judgment could be reviewed. However, at least at this point, the fault at the plant site is highly likely an active fault that needs to be considered in terms of seismic design,” the report said.
The draft report said the fault or zone of small rocks and sediment called D-1 could move simultaneously with a major active fault called the Urazoko, which is about 200 to 300 meters from the reactor buildings.
Read the rest of the story: Active fault to scuttle Tsuruga plant.
The Nuclear Regulation Authority presented a draft outline Monday of new safety measures to prevent or minimize the consequences of severe atomic plant crises.
Among other features, the NRA said utilities will be required to build a special safety facility housing a secondary control room for reactor operations to protect reactors against natural disasters and acts of terrorism, such as the intentional crashing of an aircraft into a nuclear plant.
The new safety standards are expected to come into force in July, replacing the current ones, which the triple-meltdown disaster that erupted in March 2011 at the Fukushima No. 1 plant proved were insufficient.
Read the rest of the story: NRA drafts tightened nuke plant safety rules.
Four out of the six members on Japanese government panel drafting new nuclear safety regulations each received between three million and 27 million yen in payments, donations and grants from entities in the atomic energy industry in the last three to four years, the Nuclear Regulation Authority said.
But after disclosing the data on Friday, the new nuclear watchdog’s secretariat said all four members “were selected in line with regulations, and there should thus be no problem” over their appointment.
According to the Japan Times, critics, however, cited the risk of their judgment being swayed by power companies and other nuclear-related bodies, and of the possibility that new safety regulations could be watered down.
The NRA requires experts involved in drafting safety standards for nuclear plants and other matters to disclose their remuneration and other payments received, but it has no provision to disqualify them if previously withheld information comes to light, the report said.
Read the rest of the story: Nuclear industry gave millions in grants to Japans safety experts.