Abstract: The present invention provides an eddy current flaw detection device capable of applying a sufficiently strong magnetic field to a test object without using a significantly large magnet. A magnetic-field forming magnet 60 includes a base magnet piece 60a and a tip magnet piece 60b. The tip magnet piece 60b has a tip pole face 62 from which a magnetic pole is directed toward a test object 30. The tip pole face 62 has a smaller area than a base face 64 of the base magnet piece 60a, the base face 64 being located on the opposite side of the magnetic-field forming magnet 60 from the tip pole face 62.

Abstract: The present invention provides an eddy current flaw detection device that sufficiently removes noise from a detection signal. A magnetic field is applied to a test object by a magnetic-field forming magnet. The magnetic flux density of a magnetic field generated by the magnetic-field forming magnet is set at a value in a predetermined range according to a distance between the magnetic-field forming magnet and a detection surface and the thickness of the test object.

Abstract: The present invention provides a strong magnetic force and high heat resistance for a magnetic-field forming magnet that applies a magnetic field to a test object to be inspected by an eddy current flaw detection device. A magnetic-field forming magnet for applying a magnetic field to a test object includes a first magnet and a second magnet. The first magnet has a strong magnet force and the second magnet having higher heat resistance than the first magnet is attached to a near end of the first magnet, the end near the test object.

Abstract: A cask includes a cask body, an outer cylinder, a plurality of fins, and a plurality of neutron shields. The cask body has a tubular shape around a central axis and is capable of housing fuel assemblies. The outer cylinder has a tubular shape surrounding the cask body. The fins are aligned in a circumferential direction in a tubular space formed between the cask body and the outer cylinder, and connect an outer peripheral surface of the cask body and an inner peripheral surface of the outer cylinder to divide the tubular space into a plurality of divided spaces. The neutron shields contain a neutron shielding material with which the divided spaces are filled. Each neutron shield includes a void portion extending in the axial direction along the central axis. Accordingly, it is possible to reduce stress that may be exerted on the outer cylinder or other components by thermal expansion of the neutron shielding material when the fuel assemblies are housed in the cask.

Abstract: The present invention provides a strong magnetic force and high heat resistance for a magnetic-field forming magnet that applies a magnetic field to a test object to be inspected by an eddy current flaw detection device. A magnetic-field forming magnet 60 for applying a magnetic field to a test object 30 includes a first magnet 60a and a second magnet 60b. The first magnet 60a has a strong magnet force and the second magnet 60b having higher heat resistance than the first magnet 60a is attached to a near end 62 of the first magnet 60a (the end near the test object 30).

Abstract: The present invention provides an eddy current flaw detection device that sufficiently removes noise from a detection signal. A magnetic field is applied to a test object by a magnetic-field forming magnet. The magnetic flux density of a magnetic field generated by the magnetic-field forming magnet is set at a value in a predetermined range according to a distance between the magnetic-field forming magnet and a detection surface and the thickness of the test object.

Abstract: The present invention provides an eddy current flaw detection device capable of applying a sufficiently strong magnetic field to a test object without using a significantly large magnet. A magnetic-field forming magnet 60 includes a base magnet piece 60a and a tip magnet piece 60b. The tip magnet piece 60b has a tip pole face 62 from which a magnetic pole is directed toward a test object 30. The tip pole face 62 has a smaller area than a base face 64 of the base magnet piece 60a, the base face 64 being located on the opposite side of the magnetic-field forming magnet 60 from the tip pole face 62.

Abstract: A cask includes a cask body, an outer cylinder, a plurality of fins, and a plurality of neutron shields. The cask body has a tubular shape around a central axis and is capable of housing fuel assemblies. The outer cylinder has a tubular shape surrounding the cask body. The fins are aligned in a circumferential direction in a tubular space formed between the cask body and the outer cylinder, and connect an outer peripheral surface of the cask body and an inner peripheral surface of the outer cylinder to divide the tubular space into a plurality of divided spaces. The neutron shields contain a neutron shielding material with which the divided spaces are filled. Each neutron shield includes a void portion extending in the axial direction along the central axis. Accordingly, it is possible to reduce stress that may be exerted on the outer cylinder or other components by thermal expansion of the neutron shielding material when the fuel assemblies are housed in the cask.

Abstract: A subscriber's terminal 201 is configured to be connected to an internet service provided 208 via a LAN 202, and an IP subnet distribution switch 209 within a network service provider 203. When a packet signal that has not received the authentication is input, a physical-port changeover switch 204 gives a temporary IP address to the subscriber's terminal 201, and causes the subscriber's terminal 201 to employ this for making an authentication process. If the authentication succeeds, a normal IP address is given, and the packet signal, which made use of this, is distributed to a network that is an object by the IP subnet distribution switch 209.

Abstract: In a television broadcast content distributing system, a plurality of television broadcast content distributing servers generate television broadcast contents, and a plurality of television broadcast content receiving terminals receive the television broadcast contents. Also, a first channel allocating switch is connected to the television broadcast content distributing servers to allocate channels to the television broadcast content distributing servers, respectively. On the other hand, a plurality of second channel allocating switches are provided. Each of the second allocating switches is connected to one or more of the television broadcast content receiving terminals, to thereby allocate one or more of the channels to the one or more of the television broadcast content receiving terminals. Further, a plurality of virtual local area networks are provided.

Abstract: In a mail delivery system 10, a mail-incoming rejection system is configured so that: transmission destination mail address information 130 of electronic mail 120 includes transmission destination mail addresses 131a to 13na, and destination names 131b to 13nb including a keyword 125 specific to the transmission destination mail address; and with regard to the electronic mail 120 received in a mail delivery center 300, which corresponds to the transmission destination mail address, via a network 500, its receiving section 320 collates the keyword from the destination name to be included in the transmission destination mail address information, and delivers only the electronic mail, for which the collation of the keyword was able to be made, to the above transmission destination mail address.