The corrosion of a component in a water-guiding loop of a nuclear facility is reduced. The collection spaces 148a to 148f are made to communicate with each other through a communication part 152. The serial PN diode switch, which is connected between a bit line and the ferroelectric capacitor, selectively switches a current direction between the bit line and the ferroelectric capacitor depending on voltage change between the bit line and the ferroelectric capacitor. The latch device is connected to the electric switch and the signal pinhole, such that the latch device commands the electric switch when receiving a signal from the signal pinhole. The user may then physically contact the physical identifier and the user device in order to automatically generate a unique token required to automatically gain access to the virtual application. The subtracted positive and subtracted negative images are combined to provide a merged image which is binarized.