# US 2022/0037045 A1 · Method for monitoring nuclear power plant in transient state by using signal classification

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2022/0037045 A1
- Document ID: US20220037045A1
- Status: Published application
- Kind: A1
- Application number: 17/278,924
- Filed: 2019-10-08
- Published: 2022-02-03
- Earliest claimed: 2018-11-30
- Applicants: Korea Hydro & Nuclear Power Co., Ltd
- Inventors: Ji Ho Min; Dae Woong Kim; Byoung Oh Lee; Jeong Hag Oh; Hooh Kwon Ha
- Web page: https://patentgrep.com/patent/US20220037045A1

## CPC

- G21D 3/04: Safety arrangements (emergency protection of reactor G21C9/00)
- G21C 17/00: Monitoring; Testing (measuring in general G01); {Maintaining}
- Y02E 30/00: Energy generation of nuclear origin
- Y02E 30/30: Nuclear fission reactors
- G21D: NUCLEAR POWER PLANT
- G21C: NUCLEAR REACTORS (fusion reactors, hybrid fission-fusion reactors G21B; nuclear explosives G21J)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

The present invention relates to a method for monitoring a nuclear power plant in a transient state, the method comprising the steps of: classifying signals to be monitored of the nuclear power plant into a constant monitoring signal, a primary system monitoring signal, a secondary system monitoring signal, and a monitoring signal during normal operation; constantly monitoring the constant monitoring signal at the time of starting the nuclear power plant; sequentially initiating monitoring of the primary system monitoring signal and the secondary system monitoring signal while monitoring the constant monitoring signal; and initiating monitoring of the monitoring signal during normal operation when it is determined to be operating normally after initiating the monitoring of the secondary system monitoring signal.

## Claims

### Claim 1

A method of monitoring a nuclear power plant in a transient state, the method comprising:
classifying signals to be monitored of the nuclear power plant into a constant monitoring signal, a primary system monitoring signal, a secondary system monitoring signal, and a normal operation monitoring signal;
constantly monitoring the constant monitoring signal at a time of starting the nuclear power plant;
sequentially initiating monitoring of the primary system monitoring signal and the secondary system monitoring signal while monitoring the constant monitoring signal; and
initiating monitoring of the normal operation monitoring signal when a normal operation is determined after the initiating of the monitoring of the secondary system monitoring signal.

### Claim 2 (depends on 1)

The method of claim 1,
wherein the initiating of the monitoring of the primary system is performed when a primary system initiation signal reaches a predetermined level.

### Claim 3 (depends on 2)

The method of claim 2,
wherein the primary system monitoring signal is divided into a plurality of groups
wherein initiating monitoring of each of the groups is sequentially performed according to a magnitude of the primary system initiation signal.

### Claim 4 (depends on 3)

The method of claim 3,
wherein the first system initiation signal comprises at least one of a reactor output, an reactor coolant pump (RCP) rotational speed, and an RCS cold leg temperature.

### Claim 5 (depends on 3)

The method of claim 3,
wherein the initiating of the monitoring of the secondary system monitoring signal is performed when a secondary system initiation signal reaches a predetermined level.

### Claim 6 (depends on 5)

The method of claim 5,
wherein the secondary system monitoring signal is divided into a plurality of groups,
wherein initiating monitoring of each of the groups is sequentially performed according to a magnitude of the secondary system initiation signal.

### Claim 7 (depends on 6)

The method of claim 6,
wherein the secondary system initiation signal comprises at least one of a turbine rotational speed and a generator output.

### Claim 8 (depends on 6)

The method of claim 6,
wherein some groups of the secondary system monitoring signal are initiated to be monitored before some groups of the primary system monitoring signal.