Tag Archives: radioactive water Pacific Ocean

Cleaning Radioactive Water

tritium. Image from wikipedia

Russia’s nuclear energy giant Rosatom’s subsidiary RosRAO has created a prototype water decontamination plant for use at Tokyo Electric Power Co. Holdings’ Fukushima Daiichi nuclear power station — the site of Japan’s largest nuclear disaster in March 2011. The scrubbing facility, unveiled in June 2014, is capable of removing tritium, or radioactive hydrogen, from nuclear-tainted water, something beyond the capabilities of the Fukushima plant’s current cleanup equipment. Distillation and electrolysis isolate and concentrate the isotope, which is then locked away in titanium. Experiments under conditions similar to those on the ground reportedly show the technology cutting wastewater’s radioactive material content to one-6,000th the initial level, making it safe for human consumption or release into the ocean.

Duplicating the facility near the Fukushima site and running it for the five years necessary to process 800,000 cu. meters of contaminated water would cost around $700 million in all. Companies in Japan and the U.S. are at work on their own facilities for tritium disposal, but the Russian plan’s cost and technological capability make it fully competitive, according to the project’s chief.

Rosatom has made other overtures to Japan. Executives from a mining and chemical unit have visited several times this year for talks with Japanese nuclear companies, aiming to cooperate on decommissioning the Fukushima plant and upgrading a reprocessing plant in Aomori Prefecture for spent nuclear fuel. Russia has amassed a wealth of expertise dealing with damaged nuclear reactors in the wake of the Chernobyl disaster, and would like Japan to draw on that knowledge, the subsidiary’s chief executive said.

Revving up nuclear technology exports is essential to re-energizing Russia’s domestic industry and breaking free of dependence on the resource sector, Moscow has decided. The nuclear business, along with the space industry, is one of the few tech-intensive sectors where the country is internationally competitive. President Vladimir Putin has leaned more heavily on leaders in Europe and emerging countries in recent years to agree to deals with Russia’s nuclear companies.

In Japan, the public has grown wary of nuclear energy since the accident, leaving demand for new plants in the country at next to nil. Yet Japan has more than 10 reactors slated for decommissioning, creating a market worth up to 1 trillion yen ($9.42 billion) by some calculations. Russia aims to use cooperation on the Fukushima plant to crack the broader market and grow its influence, a source at a French nuclear energy company said…

But Japanese Prime Minister Shinzo Abe nevertheless visited Russia in May 2016 for top-level talks despite U.S. objections, eager to make progress on territorial disputes over islands north of Hokkaido. Preparation is underway for another summit in the far-eastern city of Vladivostok in September 2016, as well as a visit by Putin to Japan before the year is out.
Excerpts from TAKAYUKI TANAKA, Japan nuclear cleanup next target in Russian economic offensive, Nikkei Asian Review, July 24, 2016

Leaking Radioactive Water into the Ocean

How to Release Radioactive Waste to the Pacific Ocean: IAEA on Fukushima

storage tanks for nuclear water Fukushima

From the Report of the IAEA regarding  Radioactive Water at Fukushima:  While the IAEA is recognizing the usefulness of the large number of water treatment systems deployed by TEPCO for decontaminating and thereby ensuring highly radioactive water accumulated at the site is not inappropriately released to the environment including the adjacent Pacific Ocean, the IAEA team also notes that currently not all of these systems are operating to their full design capacity and performance. ….The IAEA team is of the opinion that the present plan to store the treated contaminated water containing tritium in above ground tanks, with a capacity of 800,000 m 3 , is at best a temporary measure while a more sustainable solution is needed. Therefore the present IAEA team reiterates the advisory point of the previous decommissioning mission: “The IAEA team believes it is necessary to find a sustainable solution to the problem of managing contaminated water at TEPCO’s Fukushima Daiichi NPS. This would require considering all options, including the possible resumption of controlled discharges to the sea. TEPCO is advised to perform an assessment of the potential radiological impact to the population and the environment arising from the release of water containing tritium and any other residual radionuclides to the sea in order to evaluate the radiological significance and to have a good scientific basis for taking decisions. It is clear that final decision making will require engaging all stakeholders, including TEPCO, the NRA, the National Government, Fukushima Prefecture Government, local communities and others”.

From the IAEA report Released on May 14, 2015 MISSION REPORT IAEA INTERNATIONAL PEER REVIEW MISSION ON MID-AND-LONG-TERM ROADMAP TOWARDS THE DECOMMISSIONING OF TEPCO’S FUKUSHIMA DAIICHI NUCLEAR POWER STATION UNITS 1-4 (Third Mission) Tokyo and Fukushima Prefecture, Japan 9 – 17 February 2015

Controlling Radioactive Water: Leaks of Fukushima to the Pacific Ocean

pacific

Sensors at the Fukushima nuclear plant have detected a fresh leak of highly radioactive water to the sea, the plant’s operator announced on Feb. 22, 2015, highlighting difficulties in decommissioning the plant.  Tokyo Electric Power Co (Tepco) said the sensors, which were rigged to a gutter that pours rain and ground water at the Fukushima Daiichi plant to a nearby bay, detected contamination levels up to 70 times greater than the already-high radioactive status seen at the plant campus.  Tepco said its inspections of tanks storing nuclear waste water did not find any additional abnormalities, but it shut the gutter to prevent radioactive water from going into the Pacific Ocean.
Fresh leak detected at Fukushima N-plant, Agency France, Presse, Feb. 23, 2015