ospar_deepsea_pollution

Radioaktiver Müll im Atlantik

Als Rückmeldung auf den letzten Deepwave-Newsletter (http://www.deepwave-blog.de/2011/03/24/deepwave-newsletter-maerz-10886213/) hier ein Hinweis zur Frage nach den verklappten Fässern im Atlantik. Eine neue Studie gibt darin eine gute Zusammenfassung was alles schon an Schädigungen im Atlantik (OSPAR- Region) derzeit passierte, u.a. auch in Bezug auf Radioaktivität:

Radioactive waste.

Between 1949 and 1982 radioactive waste was dumped routinely at sites in the North East Atlantic. It included i)‘low level’ wastes from nuclear power plant operations; ii) other nuclear fuel cycle operations, including fuel fabrication and reprocessing; iii) radionuclide use in medicine, research and industry and iv) decontamination and dismantling of redundant plant and equipment [26].

In 1983 increasing concern over the continued sea disposal of radioactive waste led the Contracting Parties to the London Convention [27] to adopt a voluntary moratorium on the sea dumping of all types of radioactive waste. Amendments to the Convention, adopted in 1993 , which came into force on 20 February 1994, eventually banned sea dumping of all types of radioactive waste [25]. Twenty five years from this date, contracting parties are required to complete a scientific study relating to all radioactive wastes and other radioactive matter other than high level wastes, followed by further studies at 25 year intervals [27].

Information relating to dumping sites for radioactive waste was obtained from a single source [26], (Table 1). An estimate of the total area designated for dumping of radioactive waste was 26,323 km2, based on the aggregated areas with overlapping boundaries dissolved for each of the four designated sites (Table 6). However, this does not represent the area of seafloor covered by drums of waste so a second estimate of the extent of this activity was based on the tonnage and estimated number of drums (Table 6). Thiel [5] estimates that, in total, between 1949 and 1982, 222,732 drums containing 114,726 tonnes (t) of radioactive waste were dumped at sites in the deep North East Atlantic. This is a mean of ~0.5 t of waste per drum. Of the 42 dumping events listed in [26], 24 events totalling 112,793 t (Table 6) of waste were deposited in the OSPAR area in waters deeper than 200 m. A second estimate was calculated based on a mean of 0.5 t of waste per drum. It was estimated that there were 225,586 drums within the OSPAR area in waters deeper than 200 m with an approximate area of 1 m2 per drum [26].

Quelle:
www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0012730