KR101474553B1 - System and method for calculating efficiency of turbine of nuclear power plant - Google Patents

Abstract

Provided is a system for calculating efficiency of a high pressure (HP) turbine of a nuclear power plant, which comprises: a measurement unit which is installed in each system of the nuclear power plant; an interface unit which receives measurement results of each system from the measurement unit and delivers the same to a control unit; and the control unit which calculates the efficiency of the high-pressure turbine of the nuclear power plant based on the measurement results of each system inputted from the interface unit, wherein the control unit includes an enthalpy calculation module which calculates low pressure reheater outlet steam enthalpy based on the measurement results of each system inputted from the interface unit, calculates moisture separator outlet steam enthalpy in a moisture separator reheater (MSR) based on the calculated low pressure reheater outlet steam enthalpy, calculates MSR inlet steam enthalpy based on the calculated moisture separator outlet steam enthalpy and sets the same as ′HP turbine outlet enthalpy,′ and calculates steam enthalpy discharged to the HP turbine and sets the same as ′HP turbine inlet enthalpy′; and an efficiency calculation module which calculates efficiency of the HP turbine using the MSR inlet enthalpy set as ′the HP turbine inlet enthalpy′ by the enthalpy calculation module.

Description

TECHNICAL FIELD The present invention relates to a system and method for measuring high-pressure turbine efficiency of a nuclear power plant,

The present invention relates to a high pressure turbine efficiency measuring system and a method thereof, and more particularly, to a high pressure turbine efficiency measuring system for a nuclear power plant capable of calculating an efficiency of a high pressure turbine by calculating an accurate steam enthalpy without measuring a moisture content of a wet steam System and method thereof.

Nuclear power plants require a real-time performance monitoring system for the power plant to analyze and diagnose the performance of the turbine cycle in real time. Conventional performance monitoring systems are all for thermal power and combined-cycle power plants, and there is no performance monitoring system that reflects operational characteristics of nuclear power plants.

For thermal power plants, the steam expansion of the steam turbine cycle, except for the last two stages of the low-pressure turbine, is generally done in the superheated steam region. Unlike thermal and combined-cycle power plants that use superheated steam, nuclear power plants use wet steam, which has a degree of dryness of 99.785%, instead of superheated steam.

Related to the system for diagnosing the thermal efficiency of nuclear power generation in the past, a number of applications and disclosures have been made in addition to International Patent Publication No. 2005-041209 (hereinafter referred to as "prior literature").

The apparatus according to the prior art includes a supply water flow rate setting means for setting a feed water flow rate, a heater heat storage calculation means for calculating water supply and a plurality of heat exchange amounts in the heater, and a degree of blushing at the outlet of the high- A high-pressure turbine output calculating means for calculating an output value of the high-pressure turbine, a high-pressure turbine output calculating means for calculating an output value of the high-pressure turbine at the outlet of the high- A low pressure turbine inlet condition setting means for setting a steam condition at a low pressure turbine inlet, a low pressure turbine output calculating means for requesting an output calculation value of the low pressure turbine, a low pressure turbine output Correction means, low-pressure turbine internal efficiency calculating internal efficiency of low-pressure turbine Calculation means, and performance deterioration factor device specifying means for specifying a component that causes performance deterioration of the nuclear power plant.

However, the above-mentioned prior patents are not entirely different from the efficiency measuring method, and a full scale test for measuring the moisture content according to the conventional related technical standard (ASME PTC 6.0 Code, Steam Turbine) Because of the large measurement error, nuclear power plants in the US have not been used since the 1980s.

For this reason, it is difficult to calculate the performance of a nuclear power plant. If there is an error in the indication due to the failure of the measuring instrument used for the performance calculation, the result of the performance calculation becomes inaccurate and the reliability of the system itself becomes low.

Mechanical aging of major facilities such as turbines during the operation of nuclear power plants

It is checked and supplemented through continuous inspection and maintenance. On the other hand, since there is no system capable of detecting the performance degradation in terms of performance and performance analysis and diagnosis results vary depending on the analysis capability of the workers, it is necessary to operate the plant at less than the rated heat output, There is a problem that the electric power output between the power plants is varied.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a system and method for calculating the efficiency of a high pressure turbine by calculating accurate steam enthalpy without measuring the moisture content of the wet steam There is a purpose.

Another object of the present invention is to provide a system and a method for calculating a more accurate efficiency in consideration of an influence on an unmeasurable surplus steam flow rate in calculating the efficiency of a high pressure turbine.

In order to accomplish the above object, the present invention provides a high pressure turbine efficiency measuring system for a nuclear power plant, comprising: a measuring unit installed in each system of a nuclear power plant; An interface unit for receiving measurement results of the respective systems from the measurement unit and transmitting the measurement results to the control unit; And a controller for calculating the efficiency of the high-pressure turbine of the nuclear power plant based on the measurement results of the respective systems input from the interface unit. Wherein the control unit calculates the vapor enthalpy at the low pressure reheater outlet based on the measurement results of each system input from the interface unit and calculates the moisture enthalpy based on the vapor enthalpy at the calculated low pressure reheater outlet Calculate the steam enthalpy at the outlet of the wet separator in the reheater, calculate the steam enthalpy at the moisture reheating reheater inlet based on the steam enthalpy at the outlet of the calculated moisture separator and set it as the 'enthalpy of high pressure turbine outlet' An enthalpy calculation module for calculating a steam enthalpy discharged from the steam generator to the high pressure turbine and setting the enthalpy as 'enthalpy of high pressure turbine inlet'; And an efficiency calculation module for calculating the efficiency of the high pressure turbine by using the enthalpy of enthalpy reheater inlet set at the 'high pressure turbine outlet enthalpy' through the enthalpy calculation module. And a control unit.

According to another aspect of the present invention, there is provided a method for measuring a high-pressure turbine efficiency of a nuclear power plant, comprising the steps of: (a) receiving a measurement result of each system from an interface unit; And (b) calculating the efficiency of the high-pressure turbine of the nuclear power plant based on the measurement results of the respective systems inputted through the interface unit by the control unit; (B-1), the control unit calculates a vapor enthalpy at the low-pressure reheating outlet based on the measurement results of each system input from the interface unit, Calculate the vapor enthalpy at the outlet of the wet separator in the wet separator reheater based on the vapor enthalpy at the heat outlet and calculate the vapor enthalpy at the wet separator reheater inlet based on the calculated vapor enthalpy at the outlet of the calculated wet separator Setting it as a 'high-pressure turbine outlet enthalpy', calculating a steam enthalpy discharged from the steam generator to the high-pressure turbine and setting it as a 'high-pressure turbine inlet enthalpy'; And (b-2) calculating the efficiency of the high-pressure turbine using the enthalpy of entrained reductant inlet set to the 'high-pressure turbine outlet enthalpy' by the controller. And a control unit.

According to the present invention, it is possible to analyze and diagnose the performance of the turbine cycle of the nuclear power plant in real time by calculating the efficiency of the high-pressure turbine by calculating the correct steam enthalpy without measuring the moisture content of the wet steam, And an optimum output operation is possible.

According to the present invention, the performance of the turbine cycle, which directly affects the reactor output, can be accurately analyzed in real time, and the reactor can be operated stably based on the analysis, thereby enhancing the safety of nuclear power generation.

1 is a systematic view of a nuclear power plant.
2 is a general view showing a high pressure turbine efficiency measuring system of a nuclear power plant according to the present invention.
3 is an overall flowchart of a method for measuring the high-pressure turbine efficiency of a nuclear power plant according to the present invention.

Specific features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. It is to be noted that the detailed description of known functions and constructions related to the present invention is omitted when it is determined that the gist of the present invention may be unnecessarily blurred.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings.

The high pressure turbine efficiency measuring system according to the present invention will now be described.

1 is a system diagram of a nuclear power plant. As shown in the figure, a nuclear power plant 100 is supplied with a high-temperature, high-pressure humid steam generated in a steam generator 101 to a high-pressure turbine 110 to rotate the high-pressure turbine 110, And is discharged into the moisture separator 113 and condensed. A part of the high-temperature high-pressure humidified steam generated in the steam generator 101 is supplied to the HP Rheater 111 for the operation of the moisture separator reheater 113, And a portion thereof is supplied to the LP Reheater 123.

The superheated steam supplied to the low-pressure turbine 115 is returned to the low-pressure turbine 115 while passing through the low-pressure turbine 115, Change. The wet steam discharged from the low pressure turbine 115 is condensed into water by the condenser 117. The water discharged from the condenser 117 is supplied to the steam generator 101 via the low-pressure feedwater heater 119 and the high-pressure feedwater heater 121.

As such, since the entire cycle of the steam turbine inside the low pressure turbine 115, except for a part of the stage, is performed in the region of the humid air, the nuclear power plant can perform the performance analysis of the turbine cycle of the nuclear power plant, To analyze the efficiency, the moisture content of the steam must be accurately measured and the steam enthalpy calculated accordingly.

The high pressure turbine efficiency measuring system (S) according to the present invention is connected to the system of the nuclear power plant shown in FIG. 1, and FIG. 2 is an overall configuration diagram of the high pressure turbine efficiency measuring system (S) according to the present invention.

2, the high pressure turbine efficiency measuring system S according to the present invention includes a measuring unit 100, an interface unit 200, and a control unit 300.

The measuring unit 100 is installed in each system such as piping of a nuclear power plant.

The interface unit 200 receives the measurement results of the respective systems from the measurement unit 100 and transmits the measurement results to the control unit 300.

The control unit 300 calculates the efficiency of the high-pressure turbine of the nuclear power plant based on the measurement results of each system input from the interface unit 200. As shown in FIG. 1, the enthalpy calculation module 310 and an efficiency calculation module 320.

Specifically, the enthalpy calculation module 310 calculates the vapor enthalpy at the outlet of the low pressure reheater 123 based on the measurement results of each system input from the interface unit 200, Based on the vapor enthalpy at the outlet, the vapor enthalpy at the outlet of the moisture separator in the moisture separator 114 is calculated, and based on the vapor enthalpy at the outlet of the calculated moisture separator, The steam enthalpy of the high-pressure turbine is set to the steam enthalpy at the outlet of the high-pressure turbine, the steam enthalpy discharged from the steam generator 101 to the high-pressure turbine is calculated, and the enthalpy is set to the inlet enthalpy of the high- .

More specifically, it is as follows.

)(이하, '저압 재열기 출구 엔탈피')를 다음의 [수식 l] 을 이용하여 계산한다.The enthalpy calculation module 310 calculates the enthalpy of enthalpy at the outlet of the low pressure reheater 123 based on the measurement result of each system input through the interface unit 200

) (Hereinafter referred to as "low-pressure reheating exit enthalpy") is calculated using the following equation [1].

[Equation 1]

는 습분분리재열기(113)의 출구 과열증기의 엔탈피(MSR Outlet Cycle Steam Enthalpy),

는 고압 재열기(111)의 가열 증기의 엔탈피 (HP Reheater Heating Steam Enthalpy),

은 고압 재열기(111)에서 측정한 배수 유량(HP Reheater Drain Flow),

은 고압 재열기(111) 배수의 엔탈피(HP Reheater Drain Enthalpy),

은 습분분리재열기(113)의 입구 사이클 증기 유량(MSR Inlet Cycle Steam Flow),

은 습분분리재열기(113) 내의 습분분리기의 배수 유량(Moisture Separator Drain Flow)이다. 이때,

,

,

은 계측부(100)가 측정한 값이고, 나머지 엔탈피 값은 계산한 값이다.
here,

(MSR Outlet Cycle Steam Enthalpy) of the outlet of the moisture separation reheater 113,

(HP Reheater Heating Steam Enthalpy) of the high-pressure reheater 111,

(HP Reheater Drain Flow) measured by the high-pressure reheater 111,

(HP Reheater Drain Enthalpy) of the high-pressure reheater 111,

(MSR Inlet Cycle Steam Flow) of the moisture separation reheater 113,

Is the Moisture Separator Drain Flow of the wet separator in the moisture separator 113. At this time,

,

,

Is a value measured by the measuring unit 100, and the remaining enthalpy value is a calculated value.

)를 이용하여, 습분분리재열기(113) 내의 습분분리기 출구에서의 증기 엔탈피(

)(이하, '습분분리기 출구 엔탈피')를 다음의 [수식 2] 와 같이 계산한다. The enthalpy calculation module 310 also calculates the enthalpy of the low pressure reheater outlet enthalpy (

), The vapor enthalpy at the outlet of the wet separator in the moisture separation reheater 113

) (Hereinafter, enthalpy of outlet of wet separator) is calculated as shown in the following [Equation 2].

[Equation 2]

는 고압 터빈(110)에 연결된 저압 재열기(123)의 가열 증기의 엔탈피(LP Reheater Heating Steam Enthalpy),

은 저압 재열기(123)의 배수 유량(LP Reheater Drain Flow),

은 저압 재열기(123)의 배수의 엔탈피(LP Reheater Drain Enthalpy)이다.
here,

(LP Reheater Heating Steam Enthalpy) of the low-pressure reheater 123 connected to the high-pressure turbine 110,

(LP Reheater Drain Flow) of the low-pressure reheater 123,

Is the enthalpy (LP Reheater Drain Enthalpy) of the drainage of the low-pressure reheater 123.

)를 이용하여, 다음의 [수식 3] 과 같이 습분분리재열기(113) 입구에서의 증기 엔탈피(

)(이하, '습분분리재열기 입구 엔탈피')를 계산한다. In addition, the enthalpy calculation module 310 calculates the enthalpy < RTI ID = 0.0 >

) At the inlet of the moisture separation reheater 113 as shown in the following [Equation 3]

) (Hereinafter referred to as "moisture separation reheating enthalpy").

[Equation 3]

은 습분분리재열기(113) 내의 습분분리기의 배수 엔탈피(Moisture Separator Drain Enthalpy)이다.here,

Is the Moisture Separator Drain Enthalpy of the moisture separator in the moisture separator 113.

)를 '고압 터빈 출구 엔탈피' 라고 설정하고 효율 계산모듈(320)로 전달한다.
At this time, the calculated enthalpy of enthalpy separation reheating inlet is equal to the enthalpy of high pressure turbine outlet. Thus, the enthalpy calculation module 310 calculates the enthalpy of enthalpy

Is set as the 'high-pressure turbine outlet enthalpy' and transmitted to the efficiency calculation module 320.

On the other hand, 'enthalpy of high pressure turbine inlet' can be simply obtained by using steam discharged from the steam generator 101.

Therefore, the enthalpy calculation module 310 calculates the enthalpy of the steam discharged from the steam generator 101 to set the enthalpy of the high-pressure turbine at the inlet enthalpy of the high-pressure turbine, Remove the portion of the steam that is being vented.

)를 이용하여, 다음의 [수식 4] 와 같이 고압 터빈(110)의 효율을 계산한다.The efficiency calculation module 320 calculates the enthalpy of enthalpy of the moisture separator re-entrant set to 'High-pressure turbine outlet enthalpy'

) Is used to calculate the efficiency of the high-pressure turbine 110 as in the following [Equation 4].

[Equation 4]

Here, the available energy is the value obtained by subtracting the enthalpy of the high-pressure turbine outlet from the enthalpy of the high-pressure turbine at the inlet enthalpy of the high-pressure turbine, and the useful energy is the enthalpy of the high-pressure turbine minus the enthalpy of the high-

)이다. 다시 말해, 고압 터빈 출구 엔탈피 = 습분분리재열기 입구 엔탈피(

)인 관계가 된다.Further, the high pressure turbine outlet enthalpy can be calculated using the enthalpy calculation module 310,

)to be. In other words, the enthalpy at the outlet of the high-pressure turbine = the enthalpy

).

Further, the steam supplied from the steam generator 101 to the high-pressure reheater 111 is further supplemented with steam for the protection of the high-pressure reheating tube in addition to the steam actually required in the high-pressure reheater 11. Therefore, when applying the enthalpy of the inlet of the high-pressure turbine, this residual steam must also be considered. However, surplus steam can not be actually measured, so it can be considered by applying the designed value.

In this way, the efficiency of the high-pressure turbine 110 can be calculated without separately measuring the moisture content of the wet steam.

In addition, in the high-pressure turbine 110, the additional steam is exhausted by the high-pressure water heater 121. The enthalpy of the additional steam can also be calculated and reflected in the efficiency calculation of the high-pressure turbine 110. The enthalpy of the additional steam is calculated by using the efficiency level and the steam expansion line of the high-pressure turbine design, and the moisture separation efficiency inside the steam passage of the low-pressure turbine.

Hereinafter, a method for measuring the high-pressure turbine efficiency of a nuclear power plant using the above-described system will be described.

 In the present invention, in order to supplement the measurement error of the conventional full-scale test method for measuring the moisture content and to obtain more reliable data, the following alternative technique considering the heat balance around the moisture separator 113 Respectively.

The enthalpy at the outlet of the high pressure turbine is determined by: 1) obtaining the steam enthalpy at the outlet of the low pressure reheater 123, 2) calculating the steam enthalpy at the outlet of the desulphurization reheater 113, and 3) .

As shown in FIG. 3, the interface unit 200 receives the measurement results of the respective systems from the measurement unit 100, and transmits the measured results to the control unit 300. As shown in FIG. (S10).

)(이하, '저압 재열기 출구 엔탈피')를 계산한다(S20).The enthalpy calculation module 310 of the control unit 300 calculates the steam enthalpy at the outlet of the low pressure reheater 123 based on the measurement result of each system input through the interface unit 200

) (Hereinafter referred to as 'low-pressure reheating outlet enthalpy') (S20).

)를 이용하여, 습분분리재열기(113) 내의 습분분리기 출구에서의 증기 엔탈피(

)(이하, '습분분리기 출구 엔탈피')를 계산한다(S30). The enthalpy calculation module 310 also calculates the enthalpy of the low pressure reheater outlet enthalpy (

), The vapor enthalpy at the outlet of the wet separator in the moisture separation reheater 113

) (Hereinafter, entitled 'enthalpy of outlet of wet separator') (S30).

)를 이용하여, 습분분리재열기(113) 입구에서의 증기 엔탈피(

)(이하, '습분분리재열기 입구 엔탈피')를 계산하고, 계산된 습분분리재열기 입구 엔탈피(

)를 '고압 터빈 출구 엔탈피' 로 설정한다(S40).In addition, the enthalpy calculation module 310 calculates the enthalpy < RTI ID = 0.0 >

), The vapor enthalpy at the inlet of the moisture separation reheater 113 (

) (Hereinafter, referred to as 'moisture separation enthalpy enthalpy') is calculated, and the calculated enthalpy of re-enthalpy enthalpy

Is set to the 'high-pressure turbine outlet enthalpy' (S40).

In addition, the enthalpy calculation module 310 calculates the enthalpy of the steam discharged from the steam generator 101 and sets the enthalpy to the 'enthalpy of high-pressure turbine inlet' (S50).

)를 이용하여, 고압 터빈(110)의 효율을 계산한다(S60).
In step S40, the efficiency calculation module 320 of the control unit 300 calculates the enthalpy of enthalpy of the moisture separation re-entrant set to 'high-pressure turbine outlet enthalpy'

) Is used to calculate the efficiency of the high-pressure turbine 110 (S60).

Since the instrument 100 used for real-time performance monitoring of the power plant has a unique measurement uncertainty, the performance diagnosis result may be distorted if the performance analysis is performed based only on the measurement value of the measuring instrument 100. [ For example, if the main feedwater flow rate at the inlet of the steam generator 101 is measured to be lower than the main steam flow rate at the outlet, or the efficiency of the low-pressure turbine 115 is analyzed to be excessively low compared to the design, .

In order to solve this problem, the system (S) according to the present invention can evaluate the performance of the power plant based on more reliable data by comparing and analyzing the measured values and the tuned values in real time, Minimizing the impact of inherent uncertainty of the inherent forces.

The tuning method applied to the system of the present invention is as follows: (1) (measurement value redundancy) In addition to acquiring a plurality of data in one measurement item by installing a plurality of meters at one measurement point, (2) The redundancy is ensured through the physical association between energy and mass balances, efficiency, and measured values such as Stodola coefficients.

It is apparent that the system S according to the present invention can be applied to various kinds of nuclear power plants in addition to the examples described so far.

While the present invention has been particularly shown and described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It will be appreciated by those skilled in the art that numerous changes and modifications may be made without departing from the invention. Accordingly, all such appropriate modifications and changes, and equivalents thereof, should be regarded as within the scope of the present invention.

S: Nuclear power plant high-pressure turbine efficiency measurement system
100: measuring section 200: interface section
300: controller 310: enthalpy calculation module
320: efficiency calculation module

Claims (10)

A measuring unit installed in each system of the nuclear power plant;
An interface unit for receiving measurement results of the respective systems from the measurement unit and transmitting the measurement results to the control unit; And
A control unit for calculating the efficiency of the high pressure turbine of the nuclear power plant based on the measurement results of the respective systems input from the interface unit; , ≪ / RTI &
Wherein,
Based on the measurement results of each system input from the interface section, the vapor enthalpy at the low pressure reheater outlet is calculated, and based on the calculated enthalpy of vapor at the low pressure reheater outlet at the outlet of the wet separator in the moisturizing reheater And the steam enthalpy at the moisture separation reheater inlet is calculated based on the steam enthalpy at the outlet of the calculated moisture separator to set it as the enthalpy at the outlet of the high pressure turbine and the exhaust enthalpy from the steam generator to the high pressure turbine An enthalpy calculation module for calculating a steam enthalpy to be set to a 'high-pressure turbine inlet enthalpy'; And
An efficiency calculation module for calculating the efficiency of the high-pressure turbine using the enthalpy of entrained reductant inlet set to the 'high-pressure turbine outlet enthalpy' through the enthalpy calculation module; And a second electrode,
Wherein the enthalpy calculation module comprises:
Based on the measurement results of each system input through the interface, the steam enthalpy at the outlet of the low pressure reheater

(Hereinafter referred to as " low-pressure reheat outlet enthalpy ") is calculated using the following equation (1).
[Equation 1]

here,

(MSR Outlet Cycle Steam Enthalpy) of the outlet of the moisture separator,

(HP Reheater Heating Steam Enthalpy) of high pressure reheating,

(HP Reheater Drain Flow) measured at high pressure reheating,

Is the HP Reheater Drain Enthalpy,

(MSR Inlet Cycle Steam Flow) of the moisture separator,

Is the Moisture Separator Drain Flow in the wet separator.
delete The method according to claim 1,
Wherein the enthalpy calculation module comprises:
The calculated low-pressure re-heat outlet enthalpy (

) Was used to calculate the vapor enthalpy at the outlet of the wet separator in the wet separator reheater

(Hereinafter referred to as " enthalpy of outlet of wet separator ") is calculated as shown in the following [Equation 2].
[Equation 2]

here,

(LP Reheater Heating Steam Enthalpy) of the low pressure reheater connected to the high pressure turbine,

The LP Reheater Drain Flow,

Is the enthalpy (LP Reheater Drain Enthalpy) of the low pressure reheater.
The method according to claim 1,
Wherein the enthalpy calculation module comprises:
Calculated wet separator outlet enthalpy (

) Is used to calculate the steam enthalpy at the wet separator reheater inlet as shown in the following [Equation 3]

) (Hereinafter, referred to as " enthalpy of moisture separation reheating inlet ") is calculated.
[Equation 3]

here,

Moisture Separator Drain Enthalpy (Moisture Separator Drain Enthalpy).
The method according to claim 1,
The efficiency calculation module includes:
The enthalpy of enthalpy of entrained moisture set to 'enthalpy of high pressure turbine outlet'

) Is used to calculate the efficiency of the high-pressure turbine as in the following [Equation 4].
[Equation 4]

Here, the available energy is the value obtained by subtracting the enthalpy of the high-pressure turbine outlet from the enthalpy of the high-pressure turbine at the inlet enthalpy of the high-pressure turbine. The useful energy is the enthalpy of the high-pressure turbine minus the enthalpy of the high-
(a) receiving a measurement result of each system from an interface unit and transmitting the measurement result to a controller; And
(b) calculating the efficiency of the high-pressure turbine of the nuclear power plant based on the measurement results of the respective systems inputted through the interface unit by the control unit; ≪ / RTI >
The step (b)
(b-1) The control unit calculates the vapor enthalpy at the low-pressure reheater outlet based on the measurement result of each system input from the interface unit, and calculates the moisture enthalpy Calculate the vapor enthalpy at the outlet of the wet separator in the reheater, calculate the steam enthalpy at the wet separator reheater inlet based on the vapor enthalpy at the outlet of the calculated wet separator and set it as the 'enthalpy of high pressure turbine outlet' Calculating a steam enthalpy discharged from the steam generator to the high-pressure turbine and setting the enthalpy as 'enthalpy of high-pressure turbine inlet'; And
(b-2) calculating the efficiency of the high-pressure turbine using the enthalpy of the moisture separator reheater set to the 'high-pressure turbine outlet enthalpy' by the controller; , Wherein the first,
In the step (b-1)
The control unit controls the steam enthalpy at the outlet of the low pressure reheater based on the measurement results of each system input through the interface unit

(Hereinafter referred to as " low-pressure reheating outlet enthalpy ") is calculated using the following equation (1).
[Equation 1]

here,

(MSR Outlet Cycle Steam Enthalpy) of the outlet of the moisture separator,

(HP Reheater Heating Steam Enthalpy) of high pressure reheating,

(HP Reheater Drain Flow) measured at high pressure reheating,

Is the HP Reheater Drain Enthalpy,

(MSR Inlet Cycle Steam Flow) of the moisture separator,

Is the Moisture Separator Drain Flow in the wet separator.
delete The method according to claim 6,
In the step (b-1)
The control unit calculates the calculated low-pressure re-heating outlet enthalpy (

) Was used to calculate the vapor enthalpy at the outlet of the wet separator in the moisture separator

(Hereinafter referred to as " enthalpy of outlet of wet separator ") is calculated as shown in the following [Equation 2].
[Equation 2]

here,

(LP Reheater Heating Steam Enthalpy) of the low pressure reheater connected to the high pressure turbine,

The LP Reheater Drain Flow,

Is the enthalpy (LP Reheater Drain Enthalpy) of the low pressure reheater.
The method according to claim 6,
In the step (b-1)
The controller calculates the wet separator outlet enthalpy (

) Is used to calculate the steam enthalpy at the wet separator reheater inlet as shown in the following [Equation 3]

) (Hereinafter, referred to as " enthalpy of moisture separation reheating inlet ") is calculated.
[Equation 3]

here,

Moisture Separator Drain Enthalpy (Moisture Separator Drain Enthalpy).
The method according to claim 6,
In the step (b-2)
The control unit sets the enthalpy of enthalpy of enthalpy of reflux into enthalpy

) Is used to calculate the efficiency of the high-pressure turbine as in the following [Equation 4].
[Equation 4]

Here, the available energy is the value obtained by subtracting the enthalpy of the high-pressure turbine outlet from the enthalpy of the high-pressure turbine at the inlet enthalpy of the high-pressure turbine. The useful energy is the enthalpy of the high-pressure turbine minus the enthalpy of the high-

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