An apparatus for cleaning an irradiated nuclear fuel assembly includes a housing adapted to engage a nuclear fuel assembly. The air-swirling chamber includes a first isolating film covering on an internal side of the first electrode, a second isolating film covering on an internal side of the second electrode and an isolating tube placed between the first and second isolating films. If the content ID received from the reception unit matches a stored content ID, user information of the receiver is transmitted to a privacy-guarding unit. A first type of double-side-biasing method is to program the NAND array with a double-side-bias electron injection.