ICEM11 Final Program 9.7.11pm_ICEM07 Final Program ... - Events

Session 9 Abstracts
5) ENVIRONMENTAL SURVEILLANCE SYSTEM FOR THE SHCHUCHYE SITE (wP-59042)
Stephane Belbeze, Matthieu Hallouin, Antea (France)
An intergovernmental agreement on cooperation about chemical weapon destruction was signed between France and the Russian
federation on 14th February 2006 in the context of a Global Partnership dedicated to preventing catastrophic terrorism and the
proliferation of weapons of mass destruction. It came into effect on 25th April 2007 after ratification by both countries. The present
demonstrated project was launched as part of this collaboration on the Shchuchye site (Russia – Kurgan Oblast). The project
concerned the environmental surveillance system for the Shchuchye site required for the safe operation of the installation used to
destroy chemical weapons.
The aim was to implement equipments and methods of analysis for very low concentrations of pollutants in the three environmental
compartments: air, water and soil. This has been achieved with the help of industry and other organizations in France (Environment/SA
for supplies, INERIS and Antea Group) and Russia (ROST Association and EKROS Engineering). This system takes
account of the normal operation of the installation as well as incident management. It includes 11 stationary atmospheric measuring
stations constructed by Environment/SA and EKROS Engineering including ASTEK dedicated toxic gas detector : “Terminator
FOV-1”, 3 mobile atmospheric measuring stations, 2 mobile soil & water measuring stations, 4 sampling cars constructed by
Environment/SA and EKROS Engineering, a complete Chemical analysis laboratory which can handle ppb analysis of toxic gases,
organics and minerals pollutants, an information collection center and a meteo station which can retrieve, display and archive all
the datas or alarm from the stationary and mobile stations. Antea Group has provided a technical expertise and various negotiations
during the negotiation phase, the project initiation files & contracts redaction, the project Monitoring and reporting to stakeholders,
the REX. Up to 2009, No other site of the world uses such an innovative system. Antea Group worked on this project for 4
years. It successfully began operating in March 2009, before the start of destruction operations, after 15 months of work on the site.
6) 25 YEARS AFTER CHERNOBYL NPP ACCIDENT: EXPERIENCE AND TRENDS OF RADIOACTIVE
CONTAMINATED SOILS REHABILITATION IN BELARUS (wP-59242)
Leanid Maskalchuk, JIPNR-Sosny NAS of Belarus (Belarus)
The paper describes the developed and applied soil decontamination measures and methods in Belarus after the Chernobyl
NPP accident. It is considered the possibility of using of organomineral amendments based on natural raw materials (sapropel)
and industrial wastes (hydrolyzed lignin, clay-salt slimes) for rehabilitation of radioactive contaminated soils.
SESSION 9 — POSTER SESSION: LOW/INTERMEDIATE LEVEL WASTE MANAGEMENT (1.1)
1) NUMERICAL MODELING FOR COLLOID-FACILITATED MIGRATION OF N-NUMBER
RADIONUCLIDES CHAINS IN THE FRACTURED ROCK (w/oP-59257)
Chun-Ping Jen, National Chung Cheng University (Taiwan)
A previous numerical model for N-member radionuclide decay chains has been extended to include the effect of radionuclide
sorption with groundwater colloids. Published distribution coefficients were employed in the nuclide decay chain to illustration the
present model. The colloid concentration was assumed constant in time and space owing to equilibrium between colloid generation
and sedimentation by chemical and/or physical perturbations. Furthermore, the diffusion of colloids into the rock matrix was
ignored because the diameter of colloid is relatively large and colloids and fracture surfaces are like-charged. The results indicated
that colloids could facilitate the transport of radionuclides and the large adsorbability of nuclides with colloids enlarged the effect
of acceleration by colloids. The influence of colloids on the radionuclide transport was expected to be crucial to the actinides with
large adsorbability; however, the present results revealed that the low-adsorbing nuclides whose parent nuclides have large capability
of sorption could be also facilitated significantly by colloids indirectly. Therefore, the role of colloids played in the transport
of the radionuclides decay chain should be assessed carefully in the radioactive waste disposal. The numerical method presented
herein is helpful to verify/validate further complex far-field models.
2) LABORATORY EXPERIMENTS ON THE ALTERATION OF HIGHLY-COMPACTED BENTONITE BY
ALKALINE SOLUTION AND THE EFFECTS ON PHYSICAL PROPERTIES (wP-59318)
Satoru Miyoshi, Shinya Morikami, Yukinobu Kimura, Tomoko Jinno, Shuichi Yamamoto, Obayashi Corporation (Japan)
The issue has to be considered for the evaluation of performance of multiple burrier systems in geological repository of
radioactive waste wheather alkaline leachate from cement matterials may alterate clay materials so that they can not show the
required performance. In order to study on the alkali alteration of compacted bentonite and the effect on the physical properties,
using modified consolidation apparatus, we have done a series of experiments for a long term such that alkali solution is injected
into compacted bentonite to measure the temporal change of swelling pressure, flow rate, and the compositions of outflow solution.
We settled two cases for the experiment: one is the case where 1.0 mol/L sodium hydroxide solution is injected (case 1) and
the other saturated calcium hydroxide solution (case 2). The dry density of specimen for both cases are 1.6 g/cm3. The dissolution
of the minerals in the high-pH environment is mainly considered in case 1 and the effect of the secondary minerals to be generated
in calcium rich environment is mainly considered in case 2. The experiment is done in the bath with constant temperature 70
celcius degree to reasonably accelerate the reaction of alkali alteration. In addition to the above measurements, a series of analysis
of solid phase is done after one and half year injection of alkaline solution. Through the experiment, we found that the dissolution
rate of montmorillonite is much lower than those of accompanying minerals and that the physical properties are reasonably kept
even though some part of the minerals are dissolved.
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