Patent Number: 
Section: claims

1. A nuclear reactor instrumentation system for monitoring a nuclear power system having a reactor core within a reactor vessel, the reactor vessel having a plurality of sensors for monitoring parameters of the nuclear power system, comprising:a computer having a processor configured to be powered by a normal power source and a backup power source;a one-way wireless transmitter operable under the control of the processor and housed in a reactor building with the nuclear power system;one or more remote monitoring computers positioned external to the reactor building and communicably coupled to the computer through the one-way wireless transmitter;at least one sensor communicably coupled to the computer and operable to switch power to the computer from the normal power source to the backup power source upon a loss of normal power form the normal power source; andat least one memory coupled to the processor and containing stored programming instructions which, when executed by the processor, cause the processor to:receive data from the sensors;identify the loss of normal power from the normal power source; andin response to identifying the loss of normal power, cause the one-way wireless transmitter to transmit an encrypted version of the received data from the computer to the one or more remote monitoring computers in a single direction wireless transmission from the one-way wireless transmitter to the one or more remote monitoring computers. 2. The nuclear reactor instrumentation system of claim 1, wherein the stored programming instructions further cause the processor to switch operation of the computer from the normal power source to the backup power source. 3. The nuclear reactor instrumentation system of claim 2, wherein the identified loss of normal power comprises a loss of power to a post-accident monitoring system. 4. The nuclear reactor instrumentation system of claim 2, wherein the identified loss of normal power comprises a loss of power to a nuclear power system control room. 5. The nuclear reactor instrumentation system of claim 2, wherein the identified loss of normal power comprises a loss of power to one or more nuclear power system monitoring panels. 6. The nuclear reactor instrumentation system of claim 1, wherein the one or more remote monitoring computers are configured to receive the encrypted version of the data transmitted from the one-way wireless transmitter and decrypt the encrypted version of the data. 7. The nuclear reactor instrumentation system of claim 1, wherein the one or more sensors comprises one or more of a valve position indicator, a temperature gauge, and a pressure gauge. 8. The nuclear reactor instrumentation system of claim 1, wherein the reactor building is positioned in a protected area that encompasses the nuclear power system and the nuclear reactor instrumentation system. 9. The nuclear reactor instrumentation system of claim 8, wherein the one or more remote monitoring computers are positioned outside of the protected area. 10. The nuclear reactor instrumentation system of claim 1, wherein the at least one sensor comprises an electro-mechanical switch. 11. The nuclear reactor instrumentation system of claim 1, wherein the backup power source comprises a qualified battery system of VLA batteries. 12. The nuclear reactor instrumentation system of claim 11, wherein the backup power source is electrically coupled to an external power source that comprises a generator. 13. The nuclear reactor instrumentation system of claim 2, wherein the identified loss of normal power comprises a loss of power to a post-accident monitoring system, a loss of power to a nuclear power system control room, and a loss of power to one or more nuclear power system monitoring panels. 14. The nuclear reactor instrumentation system of claim 13, wherein the one or more remote monitoring computers are configured to receive the encrypted version of the data transmitted from the one-way wireless transmitter and decrypt the encrypted version of the data. 15. The nuclear reactor instrumentation system of claim 14, wherein the one or more sensors comprises one or more of a valve position indicator, a temperature gauge, and a pressure gauge. 16. The nuclear reactor instrumentation system of claim 15, wherein the reactor building is positioned in a protected area that encompasses the nuclear power system and the nuclear reactor instrumentation system, and the one or more remote monitoring computers are positioned outside of the protected area. 17. The nuclear reactor instrumentation system of claim 16, wherein the at least one sensor comprises an electro-mechanical switch. 18. The nuclear reactor instrumentation system of claim 17, wherein the backup power source comprises a qualified battery system of VLA batteries, and the backup power source is electrically coupled to an external power source that comprises a generator. 19. The nuclear reactor instrumentation system of claim 1, wherein the stored programming instructions further cause the processor to request authentication credentials from at least one of the one or more remote monitoring computers. 20. The nuclear reactor instrumentation system of claim 1, wherein the stored programming instructions further cause the processor to provide power from the backup power source to the plurality of sensors for monitoring parameters of the nuclear power system upon the loss of normal power.