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

Session 34 Abstracts
3) PILOT TEST OF PRECIPITATION SETUP FOR DUST SUPRESSOR AND TRANSURANIC ELEMENTS
REMOVAL FROM WASTEWATERS OF CHERNOBYL NUCLEAR POWER PLANT (w/oP-59256)
Valentin Avramenko, Svetlana Bratskaya, Dmitry Marinin, Institute of Chemistry FEBRAS; Anatoliy Terzi,
Mariya Yarmolyuk, Chernobyl Nuclear Power Plant (Russia/Ukraine)
In this paper we report the results of pilot tests of flocculation/precipitation setup for dust-suppressor (DS) and transuranic elements
(TRU) removal from wastewaters of Chernobyl Nuclear Power Plant (ChNPP), including those of the Object Shelter . Tests
were performed on the pilot unit (PU), which included service tank, precipitation tank, and accumulation tank, 300 dm3 each, connected
with pipelines with dosing and pumping equipment, and throttle valves providing controlled dosing, mixing, precipitation
and mechanical filtration of radioactive wastewaters under different conditions. Three samples of the wastewaters drainage waters
from the Object Shelter , combined drainage waters of Object Shelter and 3rd reactor unit of ChNPP, and evaporator concentrate
from SVO unit of ChNPP were tested. The reagent compositions used in pilot tests were based on coagulant POLYPACS-30 LF
(aluminum polyoxychloride), synthetic cationic flocculants Besfloc K6634, K510CA, K6732 («Kolon Life Science, Inc», South
Korea) varying in molecular weight and charge density, and natural cationic flocculant «Chitofloc» (Institute of Chemistry
FEBRAS, Russia). The following wastewater parameters were controlled during the pilot tests: pH, dry residue, oxygen consumption,
total alpha- and beta-activity, isotope composition, optical density and DS content.
It was shown that wastewaters with DS content of 200-300 mg/L could be effectively…
4) SEPARATION PROCESSES FOR THE PRETREATMENT OF HIGH-LEVEL NUCLEAR
WASTES AT THE SAVANNAH RIVER SITE (w/oP-59291)
David Hobbs, Aiken, Thomas Peters, Kathryn Taylor-Pashow, Fernando Fondeur, Charles Nash, Samuel Fink,
David Herman, Savannah River National Laboratory (SRNL) (USA) Presentation by: Jim Marra, US DOE (USA)
Separation methods for the pretreatment of the high-level nuclear wastes (HLW) at the Savannah River Site (SRS) include the
Caustic Side Solvent Extraction (CSSX) process for cesium and adsorption/ion exchange for the removal of cesium, strontium and
alpha-emitting actinides. The CSSX process uses a calixarene extractant in combination with phase modifiers in a hydrocarbon
diluent. Monosodium titanate (MST), a hydrous metal oxide, is the baseline material for the removal of strontium and alpha-emitting
radionuclides (principally Pu-238, Pu-239, Pu-240 and Np-237). Two pretreatment facilities, the Modular Caustic Side Solvent
Extraction Unit (MCU) and the Actinide Removal Process (ARP) facility began radioactive operations at SRS in 2008.
Together these facilities can treat approximately 4 million liters of waste per year. The same separation processes are also planned
for the much larger Salt Waste Processing Facility (SWPF). The SWPF, which has a design throughput of about 27 million liters
per year, is under construction and scheduled to begin radioactive operations in 2014.
Current R&D activities for the CSSX process are focused on implementing a new solvent system and stripping flowsheet that
offers enhanced extraction and stripping of cesium. This next generation solvent system features a different calixarene extractant,
uses caustic instead of nitric…
SESSION 34 — URANIUM SITES, ER ISSUES, SITE CHARACTERIZATION
AND MONITORING - PART 2 OF 2 (4.12) (4-6)
1) SAMPLING IN DECOMMISSIONING: CETAMA SEMINAR AND INTERNATIONAL OVERVIEW (w/oP-59209)
Guy Granier, Daniele Roudil, CEA MARCOULE; Didier Dubot, CEA/FAR/USLT/SPRE/SAS (France)
The quality of measurement is crucial for the safety of nuclear facilities and is a primary requirement for the characterization
of nuclear materials, fissile material monitoring and accountancy.
The Commission for the Establishment of Analysis Methods (CETAMA) is a unit of the French Alternative Energies and Atomic
Energy Commission (CEA) set up to improve the quality of analysis and measurement results, in the nuclear field, by proposing
suitable scientific and technical developments:
• Preparation and/or certification or reference materials;
• Organization of interlaboratory comparisons to assess the quality of the results and to validate analysis methods
• Published methods and reference documents validated by laboratory experiment
• Organization of workshops to share the reporting of experience among analysts
To ensure, at each level of its exploitation, a control of nuclear material dissemination is a main priority of nuclear industry in
France. Analysis is the main tool of supervision to follow this goal.
By the choice of adapted tracers, with definite frequencies the analysis allows a control and a follow-up of the nuclear operation
of the installations.
For more than 50 years of uninterrupted evolution this industry developed the comprehensive view about different aspects,
civil, military, production of energy or medical…
2) FOAM NOVEL DELIVERY TECHNOLOGY FOR REMEDIATION
OF VADOSE ZONE ENVIRONMENTS (wP-59019)
Dawn Wellman, Danielle P Jansik, Shas Mattigod, Lirong Zhong, Pacific Northwest National Laboratory;
Yuxin Wu, Lawrence Berkeley National Lab; Martin Foote, MSE Technology Applications;
Z. F. (Fred) Zhang, Pacific Northwest National Laboratory; Susan Hubbard, Lawrence Berkeley National Lab (USA)
Deep vadose zone environments can be a primary source and pathway for contaminant migration to groundwater. These environments
present unique characterization and remediation challenges that necessitate scrutiny and research. The thickness, depth,
and intricacies of the deep vadose zone, combined with a lack of understanding of the key subsurface processes (e.g., biogeochemical
and hydrologic) affecting contaminant migration, make it difficult to create validated conceptual and predictive models of subsurface
flow dynamics and contaminant behavior across multiple scales. These factors also make it difficult to design and deploy
sustainable remedial approaches and monitor long-term contaminant behavior after remedial actions.
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