Leonid B Sheikman

6798859, Sep 28, 2004

Aug 18, 2003

10/642715

William Michael Steiner - San Jose CA
Craig Miles Smith - San Jose CA
Leonid Boris Sheikman - San Jose CA
Craig Ernest Leighty - Pleasanton CA

General Electric Company - Schenectady NY

G21C 736

376217, 376216, 376230, 376259, 137814, 137815, 137819, 318560, 318604, 318681

A branch amplifier card for a nuclear reactor control rod drive control system is provided. The control system includes a control processor, a plurality of transponder cards arranged in clusters with each cluster under the control of a branch amplifier card. The branch amplifier card is configured to receive commands from the control processor, send the converted commands to transponder cards under the control of the branch amplifier card and to a downstream branch amplifier card, receive an acknowledge word from transponder cards under the control of the branch amplifier card, add AC voltage threshold level information about the transponder cards under the control of the branch amplifier card to the acknowledge word, permit transponder trouble information attached to the acknowledge word to remain in the acknowledge word, and resend the acknowledge word including the transponder trouble information to an upstream branch amplifier card.

20030202625, Oct 30, 2003

Dec 21, 2001

10/026163

William Steiner - San Jose CA, US
Steven Sawyer - San Jose CA, US
Craig Smith - San Jose CA, US
Leonid Sheikman - San Jose CA, US
Vernon Martin - Jackson WY, US
Craig Leighty - Pleasanton CA, US

G21C007/36
G21C007/06

376/217000

A transponder card for a nuclear reactor control rod drive control system is provided. The control system includes a control processor and a plurality of electrical devices operationally coupled to the control processor. The transponder card is configured to receive commands from the control processor, energize an appropriate electrical device when commanded, detect a failure in control circuitry of the transponder card, send a failure alarm, and remove power from an electrical device during a control circuitry failure event when there is no command to energize the electrical device.