Hitachi, Ltd.

Renesas Technology Corp.

Hitachi Ulsi Systems Co., Ltd.

Tsutomu Ishii

Hiromasa Takahashi

Nobuo Shibasaki

Satoshi Yamato

Mitsuo Hagiwara

Mitsuo Yotsutani

Hideo Yonemura

Kiyoshi Izumi

Tsumoru Miyahara

A microcomputer which is an integrated circuit including an electrically erasable and programmable nonvolatile semiconductor memory and a central processing unit is used for control of a disk drive. The nonvolatile semiconductor memory holds an application program such as a recorded information reproducing control program in an application program area, and holds a reboot program used for updating the application program in a reboot program area. The central processing unit executes the reboot program to rewrite the application program in whole or part, in response to a rewrite command for the application program which is supplied from the outside.

Disk drive and computer

The present invention is a control rod guide tube cleaning apparatus in a nuclear reactor which includes a rod member, one end side portion of which has a thickness such that the end side portion can pass through the inside of a connecting portion between a housing of a control rod drive mechanism and a control rod guide tube, a nozzle for sucking water, mounted on the rod member on the one end side so that the nozzle can go in and out of the rod member, a means for rotating the rod member in a horizontal direction, and a water passage for leading water sucked in the nozzle to an outside of the housing along the rod member. The rod member is inserted into the control rod guide tube through the inside of the housing. Then, the nozzle is rotated downward so that a suction port of the nozzle faces the bottom inside portion of the control rod guide tube for the suction of dust and debris. The nozzle is rotated in the horizontal direction by rotating the rod member in the horizontal direction.

Control rod guide tube cleaning apparatus in nuclear reactor

A microcomputer ( ) which is an integrated circuit including an electrically erasable and programmable nonvolatile semiconductor memory ( ) and a central processing unit ( ) is used for control of a disk drive ( ). The nonvolatile semiconductor memory holds an application program such as a recorded information reproducing control program in an application program area ( ), and holds a reboot program used for updating the application program in a reboot program area ( ). The central processing unit executes the reboot program to rewrite the application program in whole or part, in response to a rewrite command for the application program which is supplied from the outside.

Disk drive computer with programmable nonvolatile memory capable of rewriting a control program of the disk drive

Growing community of inventors

Matsudo, Japan

Tsutomu Ishii