Patent Number: 
Section: claims

1. An apparatus for separating remaining powder of hulls, the apparatus comprising:a first remaining powder separating unit operable to be supplied with hulls of spent nuclear fuel subjected to a high-temperature oxidation, including a first brush for separating remaining powder adhered on an outer peripheral surface of the hulls;a hull alignment unit operable to be supplied with the hulls from the first remaining powder separating unit, and to align the hulls;a second remaining powder separating unit operable to be supplied with the aligned hulls from the hull alignment unit, including a second brush for separating remaining powder adhered on an inner peripheral surface of the hulls; anda third remaining powder separating unit operable to be supplied with the hulls from the second remaining powder separating unit, and to separate the remaining powder remaining on the inner/outer peripheral surface of the hulls by using air. 2. The apparatus according to claim 1, further comprising:a hull receiving unit operable to receive the hulls transported from the third remaining powder separating unit; anda remaining powder receiving unit operable to receive the separated remaining powder from the hulls, whereinthe remaining powder receiving unit is positioned in a lower portion of the second remaining powder separating unit or of the third remaining powder receiving unit. 3. The apparatus according to claim 2, wherein the first remaining powder separating unit includes a charging port where the hulls are charged, the charging port being formed in an upper portion of the first remaining powder separating unit, and a discharging port where the hulls are discharged, where the discharging port is formed in a lower portion of the first remaining powder separating unit, and where the discharging port is selectively opened and closed. 4. The apparatus according to claim 2, wherein the hull alignment unit is a parts feeder for aligning the hulls by using vibration. 5. The apparatus according to claim 2, further comprising:a counting unit to determine a quantity of hulls,wherein the counting unit is an optical sensor positioned on a movement path of the hulls. 6. The apparatus according to claim 2, wherein the second remaining powder separating unit includes a clamp for fixing the hulls and two second brushes operable to be inserted into each of the hulls to separate the remaining powder. 7. The apparatus according to claim 2, wherein the third remaining powder separating unit is an air shower for applying air to the inner/outer peripheral surface of the hulls. 8. A system of separating remaining powder of hulls, the system comprising:an oxidation unit operable to powder and separate a pellet of hulls of a spent nuclear fuel subjected to a high-temperature oxidation;a first remaining powder separating unit operable to be supplied with the hulls separated in the oxidation unit, including a first brush for separating remaining powder adhered on an outer peripheral surface of the hulls;a hull alignment unit operable to be supplied with the hulls from the first remaining powder separating unit, and to align the hulls;a second remaining powder separating unit operable to be supplied with the aligned hulls from the hull alignment unit, including a second brush for separating remaining powder adhered on an inner peripheral surface of the hulls;a third remaining powder separating unit operable to be supplied with the hulls from the second remaining powder separating unit, to separate the remaining powder remaining on the inner/outer peripheral surface of the hulls using air;a hull receiving unit operable to receive the hulls transported from the third remaining powder separating unit;a remaining powder receiving unit operable to receive the remaining powder separated from the hulls; anda high-temperature vacuum heating unit operable to be supplied with at least one of the pellet separated in the oxidation unit or the remaining powder received in the remaining powder receiving unit, and to heat the pellet or the remaining powder in a high temperature vacuum.