JNFL’s application for examination of a nuclear fuel reprocessing plant was criticized by the Regulatory Commission for “lacking a sense of urgency”
JNFL Senior Managing Executive Officer Rei Sudo (left) and others explain at the Nuclear Regulation Authority’s review meeting in Minato-ku, Tokyo.
November 22, 2022
JNFL found multiple errors in the seismic calculation results of the application it submitted to the Nuclear Regulation Authority during the examination required for the operation of its reprocessing plant for spent nuclear fuel from nuclear power plants in Rokkasho Village, Aomori Prefecture. The errors were discovered when the Nuclear Regulation Commission pointed them out to JNFL. Even two years after the application was submitted, NNFL continues to reveal its inadequacies, and there is no prospect that the review will be completed.
The errors were in the results of seismic calculations for the cooling tower fire detectors, which NNFL submitted on November 8 in the form of an amendment to its application. According to NNFL, when the results of the seismic calculations were transcribed into the application, incorrect values were entered in several places. Although the documents were checked before submission, the mistake was not noticed. The cause of the error has not been disclosed, saying that it is under investigation. The correction will be corrected and resubmitted in the future.
According to the secretariat of the regulatory commission, the error in the calculation results was so simple that a person with expert knowledge would be able to recognize it at a glance.
At the review meeting held on March 15, the person in charge at the secretariat of the regulatory commission commented, “In the review of facility design, making a mistake in numerical values is a definite and serious problem,” and “It is the most rudimentary of rudiments. Why don’t they notice it? Why don’t they realize this? They have no sense of crisis at all. Rei Sudo, executive vice president of Nenryo, who is in charge of handling the review, simply stated, “This is something that really shouldn’t happen. We take this very seriously.
The reprocessing plant, a core facility under the government’s nuclear fuel cycle policy, met the new regulatory standards for basic accident countermeasures in July 2020, and in December of the same year, JNFL applied for a review of detailed facility designs and construction plans. However, there has been no significant progress since the application stage due to inadequate explanations from NNFL.
In September of this year, NNFL announced for the 26th time that it was postponing the completion of the plant due to the difficulties encountered in the review process. The company plans to announce the next target date for completion by the end of this year, but the examination process will inevitably become even more difficult due to the discovery of numerical errors. (Kenta Onozawa)
https://www.tokyo-np.co.jp/article/215291?fbclid=IwAR3axQXraZ9FR1wgBWFW97VsXYaz7LEtnmRwhAa8f6fSsxczwS8WNBpIdY4
Japan looks to finalize nuclear reactor service extension by year-end
This Feb. 13, 2021 photo taken from a Mainichi Shimbun helicopter shows the Fukushima Daiichi nuclear power plant in Fukushima Prefectur
November 8, 2022
TOKYO (Kyodo) — Japan’s industry ministry is considering extending the lifespan of nuclear reactors to beyond the current 60 years with ambitions to finalize the plan by the end of the year, in a bid to cut carbon emissions and ensure stable energy supplies threatened by Russia’s war in Ukraine, sources familiar with the matter said Tuesday.
The Ministry of Economy, Trade and Industry is looking to extend the number of years nuclear power stations can remain open by considering screening periods, necessary for stricter plant safety operations, as separate from the total service life, which could allow nuclear reactors to operate for longer. During safety checks, the nuclear plants are not operational.
A ministry panel is set to discuss extending the service life of the nuclear power stations in such a way as a main scenario among other options, with plans to finalize their decision by the end of the year, the sources said.
Under the current safety rules, the Nuclear Regulation Authority limits nuclear reactors’ service period to 40 years in principle. If approved by the regulatory body however, the period can be extended by up to 20 years.
The panel will also look at scrapping the 60-year lifespan, as well as maintaining the current rules as two alternative options, in case the proposal is found not to be viable.
Prime Minister Fumio Kishida said in August that Japan will push ahead with the use of nuclear power, citing the plan as an option to achieve net-zero emissions and secure a stable electricity supply.
Japan relies heavily on fossil fuel imports for power generation, with its energy self-sufficiency rate standing at 12.1 percent as of fiscal 2019, lower than many other developed countries.
Nuclear power plant operators must pass the tougher regulations to restart their reactors after a nationwide halt which occurred after the Fukushima nuclear disaster of March 11, 2011, which was caused by a massive earthquake and tsunami. Only a handful of reactors in Japan have since resumed operations, while the public remains concerned over their safety.
Some utilities face prolonged screening processes by the NRA. More than nine years have passed since the safety examinations of Hokkaido Electric Power Co.’s Tomari nuclear power plant began, for example.
The electric power industry has urged more than 60 years of service will be safe provided appropriate maintenance operations are guaranteed.
The safety watchdog proposed earlier this month that the safety of nuclear plants aged 30 years or older, regardless of whether a reactor lifespan is extended, be checked at least once a decade to obtain approval for their continued operation.
https://mainichi.jp/english/articles/20221108/p2g/00m/0bu/042000c
NRA risks losing its reputation as neutral nuclear watchdog body
Members of the Nuclear Regulation Authority hold a meeting Nov. 2 in Tokyo’s Minato Ward.
November 5, 2022
The Nuclear Regulation Authority (NRA) has started working on legal revisions to effectively eliminate the limit on the operational life span of nuclear reactors.
The NRA appears to be responding to growing calls for the “revival” of nuclear power generation within the government and the business community. The NRA was set up as a highly independent nuclear safety watchdog in line with lessons gleaned from the 2011 Fukushima nuclear disaster. It should not forget its original mission.
The legal life span of a nuclear reactor is 40 years in principle but can be extended to 60 years at a maximum.
But the Ministry of Economy, Trade and Industry (METI), acting at Prime Minister Fumio Kishida’s behest, has proposed increasing the life span of reactors. Acting in tandem with the government’s move, the NRA instructed its Secretariat, a government agency, to review the current rules.
In a recent meeting on this issue, the NRA Secretariat presented a proposal which would require reactors that have been in service for 30 years to undergo inspections for signs of degradation at intervals of 10 years or less to win permission for continued operation. As long as they keep passing these periodical inspections, they can run beyond the 60-year limit.
The NRA is expected to work out, possibly by the end of the year, an outline of a draft revision of the Nuclear Reactor Regulation Law for the extended operations of nuclear plants.
The 40-year cap was a rule established under a bipartisan agreement reached through Diet debate that focused on the bitter lessons from the triple meltdown at the Fukushima No. 1 nuclear power plant in 2011. This rule, along with the suspension of new construction and expansion of nuclear power plants, played an important role in reducing the nation’s dependence on atomic energy, a policy goal adopted by the government. The rule must not be changed without national debate after only 10 years.
The NRA argues that whether to extend the legal life of reactors is a policy decision concerning the use of nuclear power that is outside its mandate. That means the NRA’s mandate is to ensure proper regulations of nuclear power generation according to the government’s policy.
At a glance, this position appears to be based on the principle of the separation of nuclear safety regulation from the government’s policy to promote nuclear power generation. But it is, in effect, regulation in line with promotion.
Nuclear power plants inevitably wear down over time. There are many plant parts that were not designed to be replaced. As the initial design philosophy for reactors has become outdated, the risk of unexpected problems and malfunctions increases. The 40-year rule was partly aimed at avoiding such unclear and unpredictable risks.
Extended life spans will inevitably increase the burden of inspections and raise the cost of electricity generated by aging reactors due to costs incurred by taking the necessary measures to pass inspections. This also raises questions about whether extended operations of reactors will make economic sense.
The NRA claims the regulations for reactors that have run for 30 years or longer would become “far more rigorous than now” under the proposed change. Some NRA experts have said the new system should make it harder for older reactors to pass inspections. Others have pointed out the importance of responding to the risks posed by natural disasters like earthquakes, tsunami and volcanic eruptions.
But the specifics of the new regulations and operational rules remain unclear. The ongoing policy debate on the issue, clearly driven by arguments for promoting nuclear power, raises doubts about whether the government could develop a new regulatory system that can win the support of the residents and administrations of host communities and the public as a whole.
To prevent another nuclear tragedy, it is vital for the NRA to remain solidly committed to maintaining its independence. Serious doubt about its independence would deliver a huge blow to its credibility with society.
If its independence is undermined, the NRA might be unable to resist future political pressure for relaxing the safety regulations or safety inspections of aged and risky reactors.
The NRA must realize that the situation poses a critical test of its commitment to its core mission as the nuclear safety watchdog.
Japan set to extend maximum lifespan of nuclear plants beyond 60 yrs
Nuclear I love you forever. Despite of the still ongoing Fukushima nuclear disaster, the Japanese government is still in love with nuclear….
Oct 5, 2022
The head of Japan’s nuclear regulator said Wednesday a rule that limits the operating life of nuclear power plants to a maximum of 60 years is expected to be removed from the country’s regulations.
The possible change is in line with Prime Minister Fumio Kishida’s goal of extending the lifespan to reduce carbon emissions and provide a stable electricity supply. Still, public concern over the safety of nuclear facilities is deep-seated in Japan following the 2011 Fukushima disaster.
“We can assure you that strict regulations will never be compromised,” Shinsuke Yamanaka, chairman of the Nuclear Regulation Authority, said at a press conference.
Following the nuclear crisis triggered by a massive earthquake and tsunami, Japan introduced stringent safety standards limiting nuclear reactors’ service period to 40 years in principle.
However, that period can be extended once by 20 years if safety upgrades are made and a reactor passes the regulation authority’s screening.
The Ministry of Economy, Trade and Industry said Wednesday it would determine the plants’ operational service per a regulation under its jurisdiction, and its plan was approved by the regulatory body.
The NRA plans to create a system to ensure each aging nuclear power plant’s safety.
New head of nuclear regulator vows to maintain ‘transparency’.
September 27, 2022
The new chairman of the Nuclear Regulation Authority vowed to maintain “independence and transparency” as the government agency performs its watchdog role over Japan’s nuclear industry.
Shinsuke Yamanaka, 66, an expert on nuclear material science, took the helm of the NRA on Sept. 26.
“I will never forget the Fukushima nuclear disaster at Tokyo Electric Power Co.’s Fukushima No. 1 nuclear plant,” he said at a news conference. “With this resolve, I remain committed to the NRA’s policy to regulate the nuclear industry while steadfastly maintaining independence and transparency.”
The appointment of Yamanaka, who has been an NRA commissioner since 2017, comes as the administration of Prime Minister Fumio Kishida seeks a return to more reliance on nuclear energy. It is the first such move since the 2011 triple meltdown at the Fukushima plant.
The administration is considering building nuclear plants and new reactors to replace aged ones, something the industry ministry and nuclear industry have pushed for years.
Yamanaka pledged that the NRA will continue to remain neutral.
“The NRA should sincerely carry out its duties while keeping in mind that the safety of nuclear energy is never a guarantee,” he said.
On the NRA’s prolonged examinations of reactors to assess if they meet the new reactor safety regulations, Yamanaka said his agency will be open to measures to help speed the process.
“Our basic stance is to conduct strict inspections, but we are willing to take measures to expedite the regulation procedures and improve communications between us and nuclear plant operators,” he said.
Japan hosted 54 commercial reactors before the Fukushima nuclear accident. Of these, 27 reactor operators had applied for restarts under the more stringent reactor regulations that went into force in 2013. Only 10 have gone back online so far, however, as the NRA examinations continue.
Yamanaka also cited three things he wants to focus on in the coming years: strengthening the NRA’s ability to disseminate information, having a field-oriented approach and developing human resources.
Before joining the NRA, he did fuel safety research related to severe nuclear reactor accident at Osaka University.
Yamanaka’s term will run until September 2027. He replaced Toyoshi Fuketa, who finished his term as the second chairman of the NRA, which was established in 2012.
The same day, Tomoyuki Sugiyama, who specializes in reactor safety, joined the NRA as one of four commissioners.
Sugiyama had researched reactor safety at the Japan Atomic Energy Agency’s Nuclear Safety Research Center.
Examination of Fukushima Daiichi Nuclear Power Plant for discharge of treated water to be finished; Regulatory Commission to solicit public opinion in May.
April 15, 2022
The Nuclear Regulation Authority (NRA) held a meeting on April 15 to review TEPCO’s application for an implementation plan to discharge contaminated water from the Fukushima Daiichi Nuclear Power Plant into the ocean after purification and treatment, and accepted TEPCO’s explanation. The discussion at the review meeting is over, and the NRA will prepare a draft review document summarizing the details of the review by the end of May, and begin the procedures for approval.
One Year After the Decision to Discharge Treated Water into the Sea, the Gulf Between the Government and Fishermen Remains Unbridgeable, and the Sense of Distrust in TEPCO Has Not Changed
In December of last year, TEPCO applied to the Regulatory Commission for a review of its implementation plan, which outlines the design of the facilities, the method of discharge, and the impact on the environment and people after the discharge. So far, 15 review meetings have been held, and discussions have ended without any major changes to the plan.
After compiling a draft of the review report, the Regulatory Commission will solicit opinions (public comments) from the public for 30 days before deciding whether to approve the plan. Normally, the review of an implementation plan is closed to the public and no public comments are solicited, but the committee took an unusual step.
The approval of Fukushima Prefecture, Okuma Town, and Futaba Town, the three municipalities where the plant is located, is required before TEPCO can begin construction of a new undersea tunnel and other facilities to be built in conjunction with the offshore discharge. TEPCO had indicated that it planned to start construction in June, but there is now a possibility of a delay.
According to TEPCO’s plan, the treated water, which mainly contains radioactive tritium, will be diluted with a large amount of seawater to reduce the tritium concentration to less than 1/40th of the national discharge standard, and then discharged through an undersea tunnel to an area about 1 km offshore. The project is scheduled to begin in the spring of 2023. (Kenta Onozawa)
https://www.tokyo-np.co.jp/article/171995?fbclid=IwAR3Dg8jz8qJM3v9ZmAmupioeZ6Bi3c9emoP4mmp_FApNnuYKfl8h3fDGrgQ
Fukushima Daiichi Nuclear Power Plant Decommissioning: “It is Impossible to Foresee the End Date” says the Nuclear Regulation Commission
March 2, 2022
Nuclear Regulatory Commission Chairman Toyoshi Sarada said he believes it is impossible to predict when the decommissioning of the Fukushima Daiichi Nuclear Power Plant will be completed.
Nuclear Regulation Authority Chairman Toyoshi Sarada: “I think it is technically impossible to determine a realistic number of years that we can promise to various parties, for example.
At the press conference, Chairman Saroda stated that he believes it is virtually impossible to set a time limit on when the fuel debris in Fukushima Daiichi reactors Nos. 1 through 3 can be cleaned up.
He also recognized that it is technically impossible to give the people of Fukushima and other prefectures a fixed number of years until the plant is decommissioned.
The government and TEPCO are still aiming for a maximum of 29 years to decommission the reactors amidst difficulties in removing debris and other issues.
Fukushima Daiichi Nuclear Power Plant “debris” storage method to be reconsidered – Chairman of the Regulatory Commission, Mr. Sarada
February 2, 2022
The chairman of the Nuclear Regulation Authority (NRA), Mr. Toyoshi Sarada, has asked Tokyo Electric Power Company (TEPCO) to reconsider the storage method of concrete debris with a very small amount of radioactive materials from the Fukushima Daiichi Nuclear Power Plant, with a view to temporarily burying it underground.
It has been 11 years since the accident at the Fukushima Daiichi Nuclear Power Plant occurred in March 2011. The decommissioning of the nuclear power plant involves the removal of nuclear fuel that has cooled down after melting down. The biggest challenge is to remove the fuel debris. On the other hand, the disposal of low-level radioactive waste, which is generated in large quantities every day at the decommissioning site, is also a major issue.
As a result of the hydrogen explosions in the three reactor buildings, concrete fragments were scattered.
At a meeting of the Nuclear Regulation Authority held on the 2nd, Mr. Sarada said, “Even if we assume that the waste will be transferred in the future, there are some areas where it would be much more advantageous to bury and store the waste,” and expressed his desire to ask TEPCO to reconsider the storage method with a view to temporarily burying it underground.
The amount of waste from the decommissioning of the nuclear power plant is increasing, but the management at the site is not up to the task, so a realistic storage method must be considered with an eye to the future, he said.
Nuclear regulator says cost-cutting culture creating mistakes, delays at Fukushima plant
Labor shortage cited for Fukushima N-plant errors
Regulators to review Fukushima Daiichi plant work
NRA safety license for Sendai reactors legal, Fukuoka court finds, dismissing volcano risk lawsuit
Japan’s nuclear watchdog weighs giving children priority in distribution of iodine tablets
As a reminder, Iodine tablets only protect you from Iodine 131, not from all the other radionuclides.
Plus it has to be taken at least 4 hours before an exposure to radiation, and as usually you will be informed always late of the nuclear accident by the government authorities it will be too late for you to take those tablets….
Just another prop from the nuclear industry and of government, a make believe that you will be safe because they generously distribute you iodine tablets.
The Nuclear Regulation Authority decided Wednesday to review the nation’s distribution system for iodine tablets against radiation exposure.
November 21, 2018
The Nuclear Regulation Authority decided Wednesday to review the nation’s distribution system for iodine tablets against radiation exposure.
Japan’s nuclear regulation body decided Wednesday to review the nation’s distribution system for iodine tablets against radiation exposure, with an eye on giving priority to children.
Current rules say iodine tablets should be in principle distributed in advance to all residents living within a 5-kilometer radius of 16 nuclear plants in 13 prefectures, where doing so is deemed difficult in emergency situations.
But some municipal governments have yet to hand out the tablets to all residents, including children who are more vulnerable to radiation exposure.
An expert panel set up by the Nuclear Regulation Authority will hold its first meeting next month to review the distribution system with the aim of compiling a report by April. The NRA will decide on a new policy based on the report.
Radioactive iodine released in nuclear accidents could be accumulated in the thyroid gland, increasing the risk of thyroid cancer, particularly among children.
If the tablets are taken beforehand, potassium iodine can saturate the thyroid gland and block radioactive iodine from being stored there.
When Japan was hit by a nuclear crisis at the Fukushima No. 1 plant following the March 2011 earthquake and tsunami, iodine tablets stored at municipal governments were not effectively used.
According to the NRA, the plan to review the pre-distribution of iodine tablets is based on a guideline compiled by the World Health Organization in 2017. WHO says the protection of children and adolescents must be considered a priority as their risk of developing thyroid cancer is higher than adults. Individuals older than 40 are less likely to benefit from iodine tablets.
WHO says the timely administration of the tablets is the key for blocking radioactive exposure, and the most effective protection is offered if they are taken before or immediately at the time of radioactive exposure.
Experts are expected to discuss whether it is reasonable to reflect the WHO recommendations in the NRA’s manual on the pre-distribution of iodine tablets.
Among other topics, the panel will study how doctors will be involved in tablet distributions. It will also hear the views of municipal governments on the matter.
Watchdog says TEPCO nuclear disaster drill ‘unacceptable’
Regulator urges release of treated Fukushima radioactive water into sea
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