The 12th International Conference on Environmental ... - Events

Session 12-14 Abstracts
J) A STUDY ON THE ONCE-THROUGH BACK-END FUEL CYCLE SCENARIO - 16129
Yoon Hee Lee, Kunjai Lee,Kunjai Lee, KAIST (Korea);Jongsoon Song, Chosun University (Korea)
<strong>The</strong>re are three options for spent fuel management, recycle, once-through and wait and see. <strong>The</strong> national policy for spent fuel
in Korea is wait and seeand it has to be clearly decided for spent fuel management. <strong>The</strong> final disposal is the last stage is essential
even though the recycling option will be chosen for spent fuel management. And the long-term management considering safety and
retrievability is needed.
In this study, once-through fuel cycle was focused on for back-end fuel cycle. <strong>The</strong> international trend for SF management policy
and the Korean situation has been investigated. <strong>The</strong> once-through back-end fuel cycle scenarios has been developed and
screened. It is evaluated that the technical and economical aspect for the scenarios.
<strong>The</strong> optimal scenario has been derived by relative comparison and the long-term SF management strategy has been proposed
which satisfies both domestic conditions and international trends.
K) AERODYNAMIC RESISTANCE OF A NEW FILTERS FOR CS-137
VAPOUR CAPTURE AT HIGH TEMPERATURE - 16146
Albert Aloy, Alexander Strelnikov, Khlopin Radium Institute (Russia);
Sergey Rovny, Nikolay Pyatin, PA “Mayak” (Russia)
Major characteristics of two alumosilicate filters based on fly ash (FAF) and porous shamotte (PS) were studied for high-temperature
trapping of Cs-137 vapours. To determine aerodynamic resistance of the filters, a test facility was designed and built to
determine that the aerodynamic resistance of the initial PS was significantly lower than that of the FAF at linear air flows up to 15
cm/sec.
<strong>The</strong>rmal treatment at 1400-15000С made it possible to increase mechanical strength of the PS by factors of 1.5- 3.4, without
any significant aggravation of other characteristics that exceeded similar parameters for the FAF.
L) SEPARATION OF RARE EARTH PRECIPITATES FROM LICL-KCL EUTECTIC SALTS
BY A DISTILLATION AT A REDUCED PRESSURE -16162
Hee-Chul Eun, Korea Atomic Energy Research Institute(Korea); Hee-Chul Yang,
Yung-Zun Cho, Han-Soo Lee, In-Tae Kim, Korea Atomic Energy Research Institute (Korea)
Distillation and condensation characteristics of LiCl-KCl eutectic salts containing rare earth precipitates were investigated to
separate the rare earth precipitates from the salts effectively. <strong>The</strong> distillation flux of the salts was increased by about 1,000 times
by reducing the ambient pressure from 760 Torr to 0.5 Torr. <strong>The</strong> salt vapors were almost changed into salt lumps during a salt distillation
at the ambient pressure of 0.5 Torr and they were collected in the condensed salt storage. However, fine salt particles were
formed when the salt distillation was processed at 10 Torr and it is difficult for them to be recovered. <strong>The</strong>refore, it is thought that
a salt vacuum distillation and condensation should be processed to recover almost all of the vaporized salts at a pressure below 0.5
Torr.
M) DEVELOPMENT OF A LCC STRUCTURE FOR THE RECOVERY OF
ACTINIDES FROM MOLTEN SALT - 16167
Seungwoo Paek, Si-Hyung Kim, Dal-Seong Yoon, Joon-Bo Shim, Do-Hee Ahn,
Han-Soo Lee, Korea Atomic Energy Research Institute (Korea)
Pyroprocessing technologies have been known as the non-proliferation process in the treatment of spent nuclear fuel, because
actinide elements, including uranium and TRU, and small amounts of rare earth fission products could be simultaneously recovered
using LCC (Liquid Cadmium Cathode). However, the electro-deposition of a U/TRU mixture on a LCC has been recognized
to be disturbed by the growth of uranium dendrites which act as a solid cathode resulting in the obstruction of TRU deposition.
<strong>The</strong>refore, the inhibition of the growth of uranium dendrite on LCC is considered as a key technique for the electrowinning process.
In this study, the stirrer type and the mesh type LCC structures have been prepared to develop a LCC assembly with a high efficiency.
<strong>The</strong> electro-deposition behaviors of uranium on the different type LCC structures in molten salt electrolyte were investigated
to make an efficient LCC assembly. <strong>The</strong> experimental results showed that the mesh type LCC could crash the uranium dendrite
at LCC interface and precipitate it into the bottom of a cadmium crucible. Several experiments were conducted under various operating
conditions such as the current density and the salt concentration to optimize the design of LCC.
N) THE STANDARD-LEGAL REGULATION OF SNF IMPORT FROM FOREIGN
REACTORS IN THE RUSSIAN FEDERATION - 16171
Nekhozhin Mikhail (Russia)
Abstract not available.
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SESSION 13 - PANEL: EMERGING ISSUES IN THE MANAGEMENT FOR L/ILW
ABSTRACTS NOT REQUIRED
SESSION 14 - PANEL: INTERNATIONAL DECOMMISSIONING NETWORK
ABSTRACTS NOT REQUIRED