In Japan the Nuclear Waste Management Organization (NUMO) was set up in October 2000. The country has interim storage facilities for all waste classifications at or near the Rokkasho-mura reprocessing plant. A final disposal facility is expected to be in operation at 2035. The waste management strategy is reprocessing of all spent fuel: first in Europe, and then domestic at Rokkasho. Japan dumped low-level waste in the Pacific Ocean in 12 dumping operations between 1955 and 1969.(*01)

The Ministry of Economy, Trade and Industry (METI) is seeking permission from the Aomori prefecture to build a low-level waste storage facility at Rokkasho, adjacent to the reprocessing plant. In particular this will be for LLW and what is internationally designated as ILW returned from France from 2013. NISA recommended approval early in 2012 to increase capacity to 2000 drums (200-liter).(*02)

Interim storage & reprocessing
In 1995, Japan’s first high-level waste interim storage facility opened in Rokkasho-mura – the Vitrified Waste Storage Center. The first shipment of vitrified HLW from Europe (from the reprocessing of Japanese fuel) also arrived in that year. The last of twelve shipments from France was in 2007, making a total of 1310 canisters. The first shipments from UK arrived in March 2010, with 1850 canisters to go in about 11 shipments in the coming decade.(*03)
In 2005 the utilities Tepco and JAPC announced that a Recyclable Fuel Storage Center would be established in Mutsu City.The application was licensed in May 2010. Application for the design and construction approval was submitted to the Minister of METI in June 2010, and it was approved in August 2010, and the construction work started. The center will store spent fuel generated from Boiling Water Reactors (BWRs) and Pressurized Water Reactors (PWRs) in metallic dry casks, and is scheduled to start commercial operation in July 2012.(*04) The JPY 100 billion facility will provide interim storage for up to 50 years before used fuel is reprocessed.(*05)
The Rokkasho reprocessing plant is seriously delayed. First expected to start operation in 1992(!)(*06) and in 1998 supposed start in January 2003,(*07) is currently (April 2012) in a test phase and still not in full commercial operation. The pre-service tests of the main part of the reprocessing plant are now implemented by Nuclear and Industrial Safety Agency (NISA), and the completion is planned in October 2012.(*08)

Final disposal site selection
In the 1980s and 1990’s two sites were selected for underground research laboratories: already in April 1984 Horonobe, and in August 1995 Mizunami. Mizuname is adjacent to the Tono uranium mine where various kinds of research were conducted using existing mine shafts.(*09)

In May 2000, the Japanese parliament (the Diet) passed the Law on Final Disposal of Specified Radioactive Waste (the “Final Disposal Law”) which mandates deep geological disposal of high-level waste (defined as only vitrified waste from reprocessing spent fuel). In line with this, the Nuclear Waste Management Organisation (NUMO) was set up in October 2000 by the private sector to progress plans for disposal, including site selection, demonstration of technology there, licensing, construction, operation, monitored retrievable storage for 50 years and closure of the repository. Some 40,000 canisters of vitrified HLW are envisaged by 2020, needing disposal – all the arisings from the Japanese nuclear plants until then.

In December 2002, NUMO started to solicit applications (without a specified deadline) from local communities to host a geological repository for vitrified high-level waste that would be at least 300 meters underground. The plan is to select a site by the late 2020s. The selection process is to go through three stages: literature survey; preliminary investigation; detailed investigation for selection of a repository site (about 15 years). The facility would open to accept high-level wastes in the late 2030s.(*10)

Due to a lack of response from municipalities, the amount of the money offered to incentivize applications for the literature-survey stage was raised in 2007 to a maximum of ¥2 billion ($25 million). Up to ¥7 billion (US$90 million) would be provided during the preliminary investigation stage.(*11)

In January 2007, the mayor of Toyo-cho in Kochi Prefecture made the first application(*12) – but without consulting his town council. This resulted in his forced resignation and a special election in April 2007 that resulted in the victory of a candidate opposed to the application. The application was withdrawn.(*13) After this fiasco, the siting policy was changed to allow the government to actively solicit targeted municipalities to apply for a literature survey. So far, as of this writing, it has been the only application.(*14)

Repository operation is expected from about 2035, and the JPY 3000 billion (US$ 28 billion) cost of it will be met by funds accumulated at 0.2 yen/kWh from electricity utilities (and hence their customers) and paid to NUMO. This sum excludes any financial compensation paid by the government to local communities.

In mid 2007 a supplementary waste disposal bill was passed which says that final disposal is the most important issue in steadily carrying out nuclear policy. It calls for the government to take the initiative in helping the public nationally to understand the matter by promoting safety and regional development, in order to get the final disposal site chosen with certainty and without delay. It also calls for improvement in disposal technology in cooperation with other countries, revising the safety regulations as necessary, and making efforts to recover public trust by, for example, establishing a more effective inspection system to prevent the recurrence of data falsifications and cover-ups.

In order to make communities volunteer as possible repository host, the Nuclear Safety Commission of Japan’s Advisory Board on High-level Waste Repository Safety issued the report on ‘Safety Communication on Geological Disposal’ in January 2011. This report is based on the “Committee’s recognition that it is important, in confidence building of the safety of geological disposal, to establish a safety communication system, which enables stakeholders or their representatives to participate in the process”.(*15)

In the vision of Green Action Japan, “Japan’s nuclear waste management policy is unsustainable and in deep trouble because it is dependent on reprocessing with no alternative plan formulated. Aomori Prefecture is concerned that without a final repository site selected and without the implementation of the pluthermal program, it will become the final de-facto repository for spent nuclear fuel and high-level waste. In turn, local sites being targeted for interim storage are concerned that if reprocessing at the Rokkasho Reprocessing Plant in Aomori does not go forward as planned, they in turn may become a de-facto waste dump because the spent fuel stored at their sites would not be able to be shipped to Rokkasho. In the meantime, the prefectures with nuclear power plants are stating they do not want to extend nuclear waste storage space any further.”(*16)

Sources
*01- IAEA: Inventory of radioactive waste disposals at sea, IAEA-Tecdoc-1105, August 1999
*02- World Nuclear Association, Nuclear Power in Japan, March 2012
*03- IPFM: Managing spent fuel from nuclear power reactors, 2011, p.54
*04- Japan: Joint Convention on the Safety of Spent Fuel Management and on the Safety of Radioactive Waste Management National Report of Japan for the fourth Review Meeting, October 2011
*05- Akahata Sunday Edition: N-related money behind restart of N-waste storage facilities construction, 2 October 2011
*06- Nuclear Monitor 716: Two year delay for Rokkasho plant, 24 September 2010, p.6
*07- Nuke Info Tokyo: Japan’s HLW disposal plan, CNIC, March/April 1998
*08- Japan, October 2011, p.2
*09- Nuke Info Tokyo, March/April 1998
*10- Nuclear Waste Management Organization of Japan: Siting Factors for the Selection of Preliminary Investigation Areas, December 2002
*11- NUMO 2008: Geological Disposal of Radioactive Waste in Japan,July 2008, p.8
*12- NUMO: Tokyo town applies as a volunteer area for exploring the feasibility of constructing a repository for high-level radioactive waste, Press release, 25 January 2007
*13- Aileen Mioko Smith: The Failures of Japan’s Nuclear Fuel Cycle Program 1956 – 2007, Green Action Japan, May 2007
*14- no further applications are announced at the NUMO website, April 2012
*15- OECD: National framework for Management and regulation of radioactive waste and decommissioning, October 2011, p.9
*16- Green ActionJapan: Japanese nuclear power plant waste, website, visited April 2012