Trapping characteristics of cesium in off-gas stream using fly ash filter

Shin, Jin-Myeong; Park, Jang-Jin

doi:10.1007/bf02705634

Cited by 17 publications

(7 citation statements)

References 1 publication

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“…In addition, it should have structural soundness even at a high temperature of 1000°C. The reaction products (e.g., pollucite) of gaseous cesium and fl y ash [5][6][7] should not break away from the fi lter body. It should have strength handling before and after the trapping operation.…”

Section: Requirements Of Granule Fi Ltermentioning

confidence: 99%

“…Therefore, the granule sample 5 and referred disk-type fi lter were used for the two-zone furnace test. The inactive two-zone furnace test has been used for developing off-gas fi lters instead of active hot-cell test [5][6][7]. The two-zone furnace shown in Fig.…”

Section: Two-zone Furnace Testmentioning

confidence: 99%

“…However, although disk-type fl y ash fi lters have shown a good performance in trapping gaseous cesium [5][6][7], it has diffi culty in charging fi lters into a fi lter container and discharging fi lters from a container by remote action. Waste fi lters containing radioactive cesium have highly radioactive and decay heating.…”

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confidence: 99%

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Fabrication and performance of fl y ash granule filter for trapping gaseous cesium

et al. 2015

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Although a disk-type fly ash filter has shown a good performance in trapping gaseous cesium, it has difficulty in charging filters into a filter container and discharging waste filters containing radioactive cesium from a container by remote action. To solve the difficulty of the disk-type fly ash filter, five types of granule filters, including a ball type, tube type, and sponge-structure type have been made. Among them, the best filter type was chosen through simple crucible tests. The five types of granule filters packed into containers were loaded into five alumina crucibles of 50 cc. Five grams of CsNO3 was used as a gaseous cesium source. They were then placed in a muffle furnace and heated to 900°C and maintained for 2 hours. After the experiment, the weights of the cesium trapped filters were measured. Among the five types of granule filters, the sponge-structure type granule filter was the best, which has the highest trapping capacity of cesium. Its capacity is 0.42 g-Cs/g-filter. The chosen sponge-structure type granule filters and disk-type filters have been tested using a two-zone tube furnace. Cs volatilization and Cs trapping zones were maintained at 900 and 1000°C, respectively. Sixteen grams of CsNO3 was used as a gaseous cesium source. The cesium trapping profile of the sponge-structure type granule filters was almost similar to that of the disk-type fly ash filters. For both cases, cesium was successfully trapped within the third filter.

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Section: Requirements Of Granule Fi Ltermentioning

confidence: 99%

Section: Two-zone Furnace Testmentioning

confidence: 99%

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Fabrication and performance of fl y ash granule filter for trapping gaseous cesium

et al. 2015

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“…An off-gas treatment system for trapping fission products released from oxide feed fabrication process is very important for protecting release of nuclides to environment. In the middle of 1990s, research on the trapping of cesium released from the "Oxidation, REduction of enriched OXide fuel" (OREOX) and sintering processes has started in fabricating DUPIC fuel [2]. Off-gas treatment system for trapping both volatile fission gases such as H-3 and I in OREOX process and Cs in sintering process has been established at "DUPIC Fuel Development Facility" (DFDF) as shown in Figure 3(a).…”

Section: Unit Process Of Pyroprocessingmentioning

confidence: 99%

Current Status of Pyroprocessing Development at KAERI

Lee

Park

Lee

et al. 2013

Science and Technology of Nuclear Installations

107

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Pyroprocessing technology has been actively developed at Korea Atomic Energy Research Institute (KAERI) to meet the necessity of addressing spent fuel management issue. This technology has advantages over aqueous process such as less proliferation risk, treatment of spent fuel with relatively high heat and radioactivity, and compact equipments. This paper describes the pyroprocessing technology development at KAERI from head-end process to waste treatment. The unit process with various scales has been tested to produce the design data associated with scale-up. Pyroprocess integrated inactive demonstration facility (PRIDE) was constructed at KAERI and it began test operation in 2012. The purpose of PRIDE is to test the process regarding unit process performance, remote operation of equipments, integration of unit processes, scale-up of process, process monitoring, argon environment system operation, and safeguards-related activities. The test of PRIDE will be promising for further pyroprocessing technology development.

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“…An off-gas treatment system for trapping fission products released from the oxide feed fabrication process is very important for protecting against the release of nuclides into the environment. In the middle of the 1990s, research on the trapping of cesium released from the OREOX and sintering processes started in fabricating DUPIC fuel [7]. An off gas treatment system for trapping both volatile fission gases, such as H-3 and I in an OREOX process and Cs in a sintering process was established at the DFDF (DUPIC Fuel Development Facility) as shown in Fig.3 (a).…”

Section: Off-gas Treatment Processmentioning

confidence: 99%