Rules for steam turbine thermal acceptance tests - Part 0: Wide range of accuracy for various types and sizes of turbines

The rules given in this document are applicable to thermal acceptance tests covering a wide range of accuracy on steam turbines of every type, rating and application. Only the relevant portion of these rules will apply to any individual case. The rules provide for the testing of turbines, whether operating with either superheated or saturated steam. They include measurements and procedures required to determine specific enthalpy within the moisture region and describe precautions necessary to permit testing while respecting radiological safety rules in nuclear plants. Uniform rules for the preparation, carrying out, evaluation, comparison with guarantee and calculation of measuring uncertainty of acceptance tests are defined in this standard. Details of the conditions under which the acceptance test can take place are included. Should any complex or special case arise which is not covered by these rules, appropriate agreement is to be reached by manufacturer and purchaser before the contract is signed.

Regeln für wärmetechnische Abnahmemessung an Dampfturbinen - Teil 0: Weiter Genauigkeitsbereich für unterschiedliche Bauarten und Baugrößen von Dampfturbinen

Règles pour les essais thermiques de réception des turbines à vapeur - Partie 0: Plage de précision étendue pour différents types et dimensions de turbines

IEC 60953-0:2022 Cette édition constitue une révision technique. Cette édition comprend les modifications techniques importantes suivantes par rapport à l’édition précédente : a) IEC 60953-2:1990 a servi de base à l’élaboration de la IEC 60953-0; b) Des techniques de mesure obsolètes ont été mises à jour et la réduction correspondante de l’incertitude de mesure des résultats d’essai attendus a été indiquée; c) La garantie de la puissance de sortie au débit de vapeur spécifié a été incluse; d) Une proposition d’attribution des fuites non comptabilisées a été incluse; e) les méthodes de correction et les comparaisons de garantie sont mises à jour; f) Diverses annexes supprimées: - Annexe B (buse d’écoulement) - Annexe E (courbes de correction généralisées) - Annexe G (incertitude de mesure de la puissance) g) Annexe ajoutée: - Annexe E (Méthode de variation de température) reprise de la IEC 60953-3:2002, Annexe L Les règles données dans le présent document sont applicables aux essais d’acceptation thermique couvrant un large éventail de précision sur les turbines à vapeur de tout type, de toute puissance nominale et de toute application. Seule la partie pertinente de ces règles s’appliquera à un cas individuel. Les règles prévoient l’essai des turbines, qu’elles fonctionnent à la vapeur surchauffée ou saturée. Ils comprennent les mesures et les procédures requises pour déterminer l’enthalpie spécifique dans la région humide et décrivent les précautions nécessaires pour permettre les essais tout en respectant les règles de sûreté radiologique dans les centrales nucléaires. Des règles uniformes pour la préparation, la réalisation, l’évaluation, la comparaison avec la garantie et le calcul de l’incertitude de mesure des essais de réception sont définies dans cette norme. Les détails des conditions dans lesquelles l’essai d’acceptation peut avoir lieu sont inclus. En cas de cas complexe ou particulier qui n’est pas couvert par ces règles, un accord approprié doit être conclu entre le fabricant et l’acheteur avant la signature du contrat. Cette première édition annule et remplace la CEI 60953-2, publiée en 1990.

Pravila za preskuse toplotne sprejemljivosti parne turbine - 0. del: Širok razpon natančnosti za različne vrste in velikosti turbin (IEC 60953-0:2022)

General Information

Status
Published
Technical Committee
Drafting Committee
Current Stage
6060 - Document made available
Due Date
09-Aug-2021

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SLOVENSKI STANDARD
SIST EN IEC 60953-0:2022
01-oktober-2022
Nadomešča:
SIST EN 60953-2:2001

Pravila za preskuse toplotne sprejemljivosti parne turbine - 0. del: Širok razpon

natančnosti za različne vrste in velikosti turbin (IEC 60953-0:2022)

Rules for steam turbine thermal acceptance tests - Part 0: Wide range of accuracy for

various types and sizes of turbines (IEC 60953-0:2022)
Regeln für wärmetechnische Abnahmemessung an Dampfturbinen - Teil 0: Weiter

Genauigkeitsbereich für unterschiedliche Bauarten und Baugrößen von Dampfturbinen

(IEC 60953-0:2022)

Règles pour les essais thermiques de réception des turbines à vapeur - Partie 0: Plage

de précision étendue pour différents types et dimensions de turbines (IEC 60953-0:2022)

Ta slovenski standard je istoveten z: EN IEC 60953-0:2022
ICS:
27.040 Plinske in parne turbine. Gas and steam turbines.
Parni stroji Steam engines
SIST EN IEC 60953-0:2022 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 60953-0:2022
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SIST EN IEC 60953-0:2022
EUROPEAN STANDARD EN IEC 60953-0
NORME EUROPÉENNE
EUROPÄISCHE NORM July 2022
ICS 27.040 Supersedes EN 60953-2:1995
English Version
Rules for steam turbine thermal acceptance tests - Part 0: Wide
range of accuracy for various types and sizes of turbines
(IEC 60953-0:2022)

Règles pour les essais thermiques de réception des Regeln für wärmetechnische Abnahmemessung an

turbines à vapeur - Partie 0: Plage de précision étendue Dampfturbinen - Teil 0: Weiter Genauigkeitsbereich für

pour différents types et dimensions de turbines unterschiedliche Bauarten und Baugrößen von

(IEC 60953-0:2022) Dampfturbinen
(IEC 60953-0:2022)

This European Standard was approved by CENELEC on 2022-07-04. CENELEC members are bound to comply with the CEN/CENELEC

Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the

Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 60953-0:2022 E
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SIST EN IEC 60953-0:2022
EN IEC 60953-0:2022 (E)
European foreword

The text of document 5/248/FDIS, future edition 1 of IEC 60953-0, prepared by IEC/TC 5 "Steam

turbines" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as

EN IEC 60953-0:2022.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2023-04-04

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2025-07-04

document have to be withdrawn

This document supersedes EN 60953-2:1995 and all of its amendments and corrigenda (if any).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Any feedback and questions on this document should be directed to the users’ national committee. A

complete listing of these bodies can be found on the CENELEC website.
Endorsement notice

The text of the International Standard IEC 60953-0:2022 was approved by CENELEC as a European

Standard without any modification.

In the official version, for Bibliography, the following note has to be added for the standard indicated:

IEC 60034-2 (series) NOTE Harmonized as EN IEC 60034-2 (series)
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SIST EN IEC 60953-0:2022
EN IEC 60953-0:2022 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments)

applies.

NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the

relevant EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available

here: www.cenelec.eu.
Publication Year Title EN/HD Year
ISO/IEC Guide 98 - Uncertainty of measurement - -
IEC 60045-1 - Steam turbines - Part 1: Specifications EN IEC 60045-1 -
ISO 5167 series Measurement of fluid flow by means of EN ISO 5167 series
pressure differential devices inserted in
circular cross-section conduits running full
ISO 12242 - Measurement of fluid flow in conduits - - -
ultrasonic transit-time meters for liquids
ISO 18888 - Gas turbine combined cycle power plants - - -
Thermal performance tests
ANSI/IEEE C57.13 - IEEE Standard requirements for instrument - -
transformers
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SIST EN IEC 60953-0:2022
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SIST EN IEC 60953-0:2022
IEC 60953-0
Edition 1.0 2022-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Rules for steam turbine thermal acceptance tests –
Part 0: Wide range of accuracy for various types and sizes of turbines
Règles pour les essais thermiques de réception des turbines à vapeur –
Partie 0: Plage de précision étendue pour différents types et dimensions de
turbines
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.040 ISBN 978-2-8322-0938-7

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN IEC 60953-0:2022
– 2 – IEC 60953-0:2022 © IEC 2022
CONTENTS

FOREWORD ........................................................................................................................... 7

INTRODUCTION ..................................................................................................................... 9

1 Scope ............................................................................................................................ 11

1.1 General ................................................................................................................. 11

1.2 Object ................................................................................................................... 11

1.3 Matters to be considered in the contract ............................................................... 12

2 Normative references .................................................................................................... 12

3 Units, symbols, terms and definitions ............................................................................. 12

3.1 General ................................................................................................................. 12

3.2 Symbols, units ...................................................................................................... 13

3.3 Subscripts, superscripts and definitions ................................................................ 14

3.4 Definition of guarantee values and test results ...................................................... 16

3.4.1 Guidance on guarantee parameters ............................................................... 16

3.4.2 Thermal efficiency ......................................................................................... 16

3.4.3 Heat rate ....................................................................................................... 18

3.4.4 Thermodynamic efficiency ............................................................................. 18

3.4.5 Steam rate ..................................................................................................... 19

3.4.6 Main steam flow capacity ............................................................................... 19

3.4.7 Power output ................................................................................................. 19

3.4.8 Guarantee values for extraction and mixed-pressure turbines ........................ 20

3.4.9 Thermal Load Capacity (for Nuclear applications) .......................................... 20

4 Guiding principles .......................................................................................................... 20

4.1 Advance planning for test...................................................................................... 20

4.2 Preparatory agreements and arrangements for tests ............................................. 21

4.3 Planning of the test ............................................................................................... 22

4.3.1 Time for acceptance tests .............................................................................. 22

4.3.2 Direction of acceptance tests ......................................................................... 22

4.4 Preparation of the tests ......................................................................................... 22

4.4.1 Condition of the plant .................................................................................... 22

4.4.2 Condition of the steam turbine ....................................................................... 23

4.4.3 Condition of the condenser ............................................................................ 23

4.4.4 Isolation of the cycle ...................................................................................... 24

4.4.5 Checks for leakage of condenser and feed water heaters .............................. 26

4.4.6 Cleanliness of the steam strainers ................................................................. 26

4.4.7 Checking of the test measuring equipment .................................................... 26

4.5 Comparison measurements ................................................................................... 26

4.6 Settings for tests ................................................................................................... 27

4.6.1 Load settings ................................................................................................. 27

4.6.2 Special settings ............................................................................................. 28

4.7 Preliminary tests ................................................................................................... 28

4.8 Acceptance tests .................................................................................................. 28

4.8.1 Constancy of test conditions .......................................................................... 28

4.8.2 Maximum deviation and fluctuation in test conditions ..................................... 28

4.8.3 Duration of test runs and frequency of reading............................................... 29

4.8.4 Reading of integrating measuring instruments ............................................... 30

4.8.5 Alternative methods ....................................................................................... 30

4.8.6 Recording of tests ......................................................................................... 30

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4.8.7 Additional measurement ................................................................................ 30

4.8.8 Preliminary calculations ................................................................................. 30

4.8.9 Consistency and number of tests ................................................................... 30

4.9 Repetition of acceptance tests .............................................................................. 31

5 Measuring techniques and measuring instruments ......................................................... 31

5.1 Overview .............................................................................................................. 31

5.1.1 Instrument accuracy requirements ................................................................. 31

5.1.2 Measuring instruments .................................................................................. 31

5.1.3 Measuring uncertainty ................................................................................... 31

5.1.4 Calibration of instruments .............................................................................. 32

5.1.5 Alternative instrumentation ............................................................................ 32

5.2 Measurement of power.......................................................................................... 36

5.2.1 Determination of mechanical turbine output ................................................... 36

5.2.2 Measurement of boiler feed pump power ....................................................... 36

5.2.3 Determination of electrical power of a turbine generator ................................ 37

5.2.4 Measurement of electrical power ................................................................... 38

5.2.5 Electrical instrument connections................................................................... 38

5.2.6 Electrical instruments .................................................................................... 38

5.2.7 Instrument transformers ................................................................................. 39

5.3 Flow measurement ................................................................................................ 39

5.3.1 Determination of flows to be measured .......................................................... 39

5.3.2 Measurement of primary flow ......................................................................... 39

5.3.3 Installation and location of flow measuring devices ........................................ 42

5.3.4 Calibration of primary flow devices for water flow .......................................... 43

5.3.5 Inspection of flow measuring devices ............................................................. 44

5.3.6 Differential pressure measurements .............................................................. 45

5.3.7 Water flow fluctuation .................................................................................... 45

5.3.8 Secondary flow measurements ...................................................................... 45

5.3.9 Occasional secondary flows........................................................................... 48

5.3.10 Density of water and steam ........................................................................... 49

5.3.11 Determination of cooling water flow of condenser .......................................... 49

5.4 Pressure measurement (excluding condensing turbine exhaust pressure) ............. 50

5.4.1 Pressures to be measured ............................................................................. 50

5.4.2 Instruments ................................................................................................... 50

5.4.3 Main pressure measurements ........................................................................ 50

5.4.4 Pressure tapping holes and connecting lines ................................................. 51

5.4.5 Shut-off valves .............................................................................................. 52

5.4.6 Calibration of pressure measuring devices .................................................... 52

5.4.7 Atmospheric pressure .................................................................................... 52

5.4.8 Correction of readings ................................................................................... 52

5.5 Condensing turbine exhaust pressure measurement ............................................. 53

5.5.1 General ......................................................................................................... 53

5.5.2 Plane of measurement ................................................................................... 53

5.5.3 Pressure taps ................................................................................................ 53

5.5.4 Manifolds ....................................................................................................... 54

5.5.5 Connecting lines ............................................................................................ 54

5.5.6 Instruments ................................................................................................... 54

5.5.7 Calibration ..................................................................................................... 54

5.6 Temperature measurement ................................................................................... 54

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SIST EN IEC 60953-0:2022
– 4 – IEC 60953-0:2022 © IEC 2022

5.6.1 Points of temperature measurement .............................................................. 54

5.6.2 Instruments ................................................................................................... 55

5.6.3 Main temperature measurements ................................................................... 55

5.6.4 Feed train temperature measurements (including bled steam) ....................... 55

5.6.5 Condenser cooling water temperature measurement ..................................... 56

5.6.6 Thermometer wells ........................................................................................ 56

5.6.7 Precautions to be observed in the measurement of temperature .................... 57

5.7 Steam quality determination .................................................................................. 57

5.7.1 General ......................................................................................................... 57

5.7.2 Tracer technique ........................................................................................... 57

5.7.3 Condensing method ....................................................................................... 58

5.7.4 Constant rate injection method ...................................................................... 61

5.7.5 Extraction enthalpy determined by constant rate injection method ................. 62

5.7.6 Tracers and their use ..................................................................................... 64

5.8 Time measurement ............................................................................................... 65

5.9 Speed measurement ............................................................................................. 65

6 Evaluation of tests ......................................................................................................... 65

6.1 Preparation of evaluation ...................................................................................... 65

6.2 Computation of results .......................................................................................... 66

6.2.1 Calculation of average values of instrument readings .................................... 66

6.2.2 Correction and conversion of averaged readings ........................................... 66

6.2.3 Checking of measured data ........................................................................... 66

6.2.4 Thermodynamic properties of steam and water .............................................. 67

6.2.5 Calculation of test results .............................................................................. 68

7 Correction of test results and comparison with guarantee .............................................. 68

7.1 Guarantee values and guarantee conditions ......................................................... 68

7.2 Correction of initial steam flow capacity ................................................................ 68

7.3 Correction of output .............................................................................................. 69

7.3.1 Correction of maximum output ....................................................................... 69

7.3.2 Correction of Output with specified initial steam flow ..................................... 69

7.4 Correction of the thermal performance .................................................................. 69

7.5 Definition and application of correction values ...................................................... 70

7.6 Correction methods ............................................................................................... 70

7.6.1 General ......................................................................................................... 70

7.6.2 Correction by heat balance calculation .......................................................... 71

7.6.3 Correction by use of correction curves prepared by the manufacturer ............ 72

7.6.4 Tests to determine correction values ............................................................. 72

7.7 Variables to be considered in the correction of specific turbine cycles .................. 72

7.7.1 Scope of corrections ...................................................................................... 72

7.7.2 Turbines with regenerative feed-water heating ............................................... 72

7.7.3 Turbines which have no provision for the addition or extraction of steam

after partial expansion ................................................................................... 74

7.7.4 Turbines with steam extraction for purposes other than feed-water

heating (extraction turbines) .......................................................................... 74

7.7.5 Other types of turbine .................................................................................... 74

7.8 Guarantee comparison .......................................................................................... 75

7.8.1 Tolerance and weighting ................................................................................ 75

7.8.2 Guarantee comparison with locus curve ......................................................... 75

7.8.3 Guarantee comparison with guarantee point .................................................. 76

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7.8.4 Guarantee comparison for turbines with throttle governing ............................ 76

7.8.5 Guarantee comparison for extraction turbines ................................................ 76

7.9 Deterioration of turbine performance (ageing) ....................................................... 77

7.9.1 Timing to minimise deterioration .................................................................... 77

7.9.2 Correction with comparison tests ................................................................... 77

7.9.3 Correction without comparison tests .............................................................. 77

8 Measuring uncertainty ................................................................................................... 78

8.1 General ................................................................................................................. 78

8.2 Determination of measuring uncertainty of steam and water properties ................. 79

8.2.1 Pressure ........................................................................................................ 79

8.2.2 Temperature .................................................................................................. 79

8.2.3 Enthalpy and enthalpy difference ................................................................... 79

8.3 Calculation of measuring uncertainty of output ...................................................... 80

8.3.1 Electrical measurement ................................................................................. 80

8.3.2 Mechanical measurement .............................................................................. 82

8.3.3 Additional uncertainty allowance because of unsteady load conditions .......... 82

8.4 Determination of measuring uncertainty of mass flow ............................................ 82

8.4.1 Measuring uncertainty of mass flow measurements ....................................... 82

8.4.2 Measuring uncertainty of multiple measurements of primary flow ................... 82

8.4.3 Uncertainty allowance for cycle imperfections ................................................ 83

8.5 Calculation of measuring uncertainty of results ..................................................... 83

8.5.1 General ......................................................................................................... 83

8.5.2 Measuring uncertainty of thermal efficiency ................................................... 83

8.5.3 Measuring uncertainty of thermodynamic efficiency ....................................... 84

8.5.4 Uncertainty of corrections .............................................................................. 84

8.5.5 Guiding values for the measuring uncertainty of results ................................. 85

8.6 Example uncertainty calculation ............................................................................ 85

Annex A (normative) Feedwater heater leakage and condenser leakage tests ..................... 87

A.1 Feedwater heater leakage tests ............................................................................ 87

A.2 Condenser leakage tests ...................................................................................... 87

Annex B (normative) Evaluation of multiple measurements, compatibility ............................. 88

Annex C (normative) Mass flow balances ............................................................................. 89

C.1 General ................................................................................................................. 89

C.2 Flows for further evaluations (informative) ............................................................ 90

Annex D (informative) Short-statistical definition of measuring uncertainty and error

propagation in acceptance tests .................................................................................... 92

Annex E (informative) Temperature variation method ........................................................... 96

E.1 Description of the problem .................................................................................... 96

E.2 Possibility to determine the leakage flow ............................................................... 96

E.3 Applied example ................................................................................................... 98

Bibliography ........................................................................................................................ 102

Figure 1 – Diagrams for interpretation of symbols and subscripts .......................................... 17

Figure 2 – Diagram showing location and type of test instrumentation (fossil fuel plant) ........ 33

Figure 3 – Diagram showing location and type of test instrumentation (nuclear plant) ........... 34

Figure 4 – USM with flow conditioner or flow straightener. .................................................... 41

Figure 5 – Throttle steam quality calculations for boiling water reactor .................................. 60

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Figure 6 – Throttle steam quality calculations for pressurized water reactor .......................... 61

Figure 7 – Typical installation of injection and sampling points ............................................. 63

Figure 8 – Oxygen content of sample stream ........................................................................ 64

Figure 9 – Guarantee comparison on locus curve ...............................
...

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