BASSIST: an applied thermodynamic database for radionuclide chemistry

2003 ◽  
Vol 91 (11) ◽  
Author(s):  
Lionel Bion

AbstractBASSIST (Base Applied to Speciation in Solution, at Interfaces and SolubiliTy) is an applied thermodynamic database (TDB) for chemistry of long-lived radionuclides. This TDB is developed at the French Atomic Energy Commission (CEA) and concerns solution, sorption and dissolution equilibria. The order of the different steps necessary to elaborate this TDB are presented, from a critical review of experimental acquisitions until to a database compilation. Important concepts such as the heterogeneity of data, the coherence of database and the use of chemical analogies between elements are discussed by using an example of application of the TDB in speciation calculation. The TDB BASSIST is built by using "certified" data, such as selected values of the Nuclear Energy Agency (NEA) and some uncertified data from literature. In the last part of this article, the choice of chemical analogies between elements, the impact of different sets of data on uranium(IV) speciation calculations are discussed.

2008 ◽  
Vol 10 (2) ◽  
pp. 149-152 ◽  
Author(s):  
Jorge Morales Pedraza ◽  
Eddy O. Sánchez Noda ◽  
Ramón Lorenzo Rodríguez Cardona ◽  
Isabel Otero

1994 ◽  
Vol 353 ◽  
Author(s):  
Masayoshi Hayashi

It is a great pleasure for me to deliver the keynote address this morning, opening the 18th International Symposium on the Scientific Basis for Nuclear Waste Management. On behalf of the Atomic Energy Commission of Japan, I would like to welcome all of you, particularly those who have travelled across the ocean to attend this symposium.


Author(s):  
Muzna Assi

The disused sealed radioactive sources including orphan sources in Lebanon, along with the growing industry of sealed radioactive sources in medical, industrial and research fields have posed a serious problem for authorities as well as users due to the lack of a national store for disused radioactive sources. Assistance from the International Atomic Energy Agency (IAEA) was requested to condition and store disused radium needles and tubes present at two facilities. The mission took place on July 25, 2001 and was organized by the IAEA in cooperation with the Lebanese Atomic Energy Commission (LAEC). Other disused radioactive sources were kept in the facilities till a safer and securer solution is provided; however orphan sources, found mainly during export control, were brought and stored temporarily in LAEC. The necessity of a safe and secure store became a must. Prior to October 2005, there was no clear legal basis for establishing such store for disused radioactive sources, until the ministerial decree no 15512 dated October 19, 2005 (related to the implementation of decree-law no 105/83) was issued which clearly stated that “The LAEC shall, in cooperation with the Ministry of Public Health, establish a practical mechanism for safe disposal of radioactive waste”. Following this, the work on inventory of disused sealed sources along with collecting orphan sources and placing them temporarily in LAEC was legally supported. Moreover, several missions were planned to repatriate category I and II sources, one of which was completed specifically in August 2009; other missions are being worked on. In 2008, a national technical cooperation project with the IAEA was launched. Under the Technical Cooperation (TC) project with reference number LEB3002, the project was entitled “Assistance in the establishment of a safe temporary national storage at the LAECfor orphan sources and radioactive waste” which cycle is 2009–2011. Under this project, a national store for radioactive sources in the third basement of LAEC is being established. The area is being reconstructed currently and will be equipped when ready under LEB3002 project. Along with this, a system for sealed disused sources management has been prepared, part of which is applied now and the rest will be applied upon the establishment of the store. This paper will cover the inventory collection process, the study for the establishment of this store, the present and prospective waste management system, and the waste acceptance criteria.


2014 ◽  
Vol 41 (1) ◽  
pp. 87-91 ◽  
Author(s):  
Rana Baydoun ◽  
Omar Samad ◽  
Maria Aoun ◽  
Bilal Nsouli ◽  
Ghassan Younes

AbstractA new radiocarbon laboratory has been established recently at the Lebanese Atomic Energy Commission. This laboratory consists of benzene synthesis line and a low background liquid scintillation counter, Tri-Carb 3180 TR/SL for measurements with Bismuth Germanate (BGO) guard detector. The effectiveness of the benzene line was tested firstly by preparing benzene from a wood sample after carbide and acetylene receiving. Normalization and standardization of the liquid scintillation counter was carried out, as well as the Factor of Merit (E2/B) was determined for three different counting regions. To assure accuracy and reliability of results, reference materials were used. Based on z-score and u-score evaluation, as well as Student’s t-test, acceptable data were obtained from travertine and wood samples available through the International Atomic Energy Agency (IAEA-C2 and IAEA-C5), and humic acid (U) and murex shell (R) from the Fifth International Radiocarbon Intercomparison (VIRI). After that, a preliminary study was done, which is the base for future research in order to assess the anthropogenic impact and degree of environmental pollution in terms of radiocarbon isotope ratio (Δ14C) deduced from the Percent Modern Carbon or PMC. This work represents the results of four reference materials and those of five green grass samples. The Δ14C of green grass samples collected from two different clean zones were found to be 50‰ and 52‰, while the values of those collected from different polluted zones were 23‰, 7‰ and 15‰.


Politologija ◽  
2020 ◽  
Vol 100 (4) ◽  
pp. 106-152
Author(s):  
Justinas Juozaitis

Lithuanian foreign policy perceives International Atomic Energy Agency (IAEA) as an organization with the most significant authority in nuclear safety, capable of assessing Ostrovets NPP's compliance with international nuclear safety standards objectively. Simultaneously, the IAEA is one of the most important international institutions through which Lithuania sought to reveal the shortcomings of the Ostrovets NPP while attempting to legitimize its critical position towards the power plant. Given the relevance of IAEA in Lithuanian foreign policy, the article examines IAEA's public discourse on nuclear energy in Belarus. It aims to assess its role in the process of legitimizing Lithuania's opposition to Ostrovets NPP. After analyzing the IAEA’s leadership statements, the official press releases and the reports published by the peer-review missions during 2007 – 2020, the paper concludes that the IAEA formed a public discourse that exclusively favoured Belarus and significantly contradicted to Lithuania's official position. In this way, the IAEA did not legitimize Lithuania's foreign policy towards Ostrovets NPP. On the contrary, the organization supported nuclear energy development in Belarus. In relation with the findings, the paper provides three suggestions for reshaping the role of IAEA in Lithuanian foreign policy.


2008 ◽  
Vol 10 (2) ◽  
pp. 103-107 ◽  
Author(s):  
Nazly Hilmy ◽  
Menkher Manjas ◽  
Ferdiansyah ◽  
Basril Abbas ◽  
Jorge Morales Pedraza

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