1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationNuclear power plants Instrumentation important tosafety Temperature sensors (in-core and primary coolant circuit) Characteristics and test methodsBS IEC 60737:2010National forewo
2、rdThis British Standard is the UK implementation of IEC 60737:2010.The UK participation in its preparation was entrusted to Technical CommitteeNCE/8, Reactor instrumentation.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not pur
3、port to include all the necessary provisions of acontract. Users are responsible for its correct application. BSI 2010ISBN 978 0 580 58934 8ICS 27.120.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the Stan
4、dardsPolicy and Strategy Committee on 31 August 2010.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS IEC 60737:2010IEC 60737Edition 2.0 2010-06INTERNATIONAL STANDARD NORME INTERNATIONALENuclear power plants Instrumentation important to safety Temperature sensors (in-
5、core and primary coolant circuit) Characteristics and test methods Centrales nuclaires de puissance Instrumentation importante pour la sret Capteurs de temprature (dans le cur et le circuit primaire) Caractristiques et mthodes dessai INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNI
6、QUE INTERNATIONALE UICS 27.120.20 PRICE CODECODE PRIXISBN 978-2-88912-020-8 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale BS IEC 60737:2010 2 60737 IEC:2010 CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.8 2 Normative
7、references .8 3 Terms and definitions .9 4 General considerations.11 4.1 Requirements for temperature measurements .11 4.2 Safety applications 12 4.3 Nuclear conditions.12 5 Temperature sensors12 5.1 Resistance temperature detector.12 5.2 Thermocouple .14 5.3 Other temperature sensors15 5.4 Comparis
8、on between RTD and thermocouples 15 6 Characteristics of a temperature sensor .16 6.1 General .16 6.2 Installation 16 6.2.1 Thermowell16 6.2.2 Cables.16 6.3 Functional characteristics16 6.3.1 Sensitivity16 6.3.2 Response time 16 6.3.3 Linearity 17 6.4 Accuracy in temperature measurements 17 6.5 Mech
9、anical characteristics 17 7 Temperature measurement system design .18 7.1 General requirements18 7.1.1 General .18 7.1.2 Environmental conditions.19 7.1.3 Classification.19 7.1.4 Performance19 7.2 Site implementation.19 7.2.1 Environmental conditions and operation 19 7.2.2 Operating mode.20 7.2.3 Ca
10、libration.20 7.2.4 Measuring range and accuracy21 7.2.5 Electrical conditions.21 8 Requirements for tests .22 8.1 General .22 8.2 Pre-production testing .22 8.3 Production processes and testing22 8.3.1 General .22 8.3.2 Factors for sheathed thermocouples23 8.3.3 Factors for RTD.23 8.4 Tests on site
11、.23 9 Qualification tests.23 BS IEC 60737:201060737 IEC:2010 3 9.1 Principles 23 9.2 Test sequence on a sensor .24 9.3 Test for environmental conditions24 9.3.1 Temperature test 24 9.3.2 Pressure test .24 9.3.3 Other tests 24 9.4 Seismic tests.24 Bibliography25 Table 1 RTD and thermocouple character
12、istic comparison .15 BS IEC 60737:2010 4 60737 IEC:2010 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ NUCLEAR POWER PLANTS INSTRUMENTATION IMPORTANT TO SAFETY TEMPERATURE SENSORS (IN-CORE AND PRIMARY COOLANT CIRCUIT) CHARACTERISTICS AND TEST METHODS FOREWORD 1) The International Electrotechnical Commi
13、ssion (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and i
14、n addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee i
15、nterested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordanc
16、e with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interes
17、ted IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsibl
18、e for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence bet
19、ween any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of c
20、onformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and m
21、embers of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publicatio
22、n or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publicatio
23、n may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60737 has been prepared by subcommittee 45A: Instrumentation and control of nuclear facilities, of IEC technical committee 45: Nuclear instrumentation. T
24、his second edition cancels and replaces the first edition published in 1982. This edition constitutes a technical revision. The main changes with respect to the previous edition are listed below: to up-date the references to standards published or revised since the issue of the first edition of the
25、current standard, including IEC 61513 and IEC 61226; to include descriptions of the comparative performance of thermocouples and resistance temperature detectors; to include a discussion of the temperature measuring system requirements for reactors; to adapt the definitions; BS IEC 60737:201060737 I
26、EC:2010 5 to update the format to align with the current ISO/IEC Directives on style of standards. The text of this standard is based on the following documents: FDIS Report on voting 45A/800/FDIS 45A/806/RVDFull information on the voting for the approval of this standard can be found in the report
27、on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in t
28、he data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. BS IEC 60737:2010 6 60737 IEC:2010 INTRODUCTION a) Technical background, main issues and organisation of the Standard This International Standard addr
29、esses the issues specific to temperature detectors used mainly for in-core and primary coolant circuit instrumentation systems. It describes the principles, the characteristics and the test methods for temperature detectors including: RTDs and thermocouples. It is organized into clauses giving: the
30、definitions; description of the different types of temperature sensors; system design; analysis of the factors of influence; the operational conditions for sensors; the factory tests; the qualification tests. It is intended that the Standard be used by operators of NPPs (utilities), nuclear plant de
31、signers and constructors, systems evaluators and by licensors. b) Situation of the current Standard in the structure of the IEC SC 45A standard series IEC 60737 is the third level IEC SC 45A document tackling the specific issue of characteristics and test methods related to temperature detectors use
32、d in power reactors. For more details on the structure of the IEC SC 45A standard series, see the paragraph d) of this introduction. c) Recommendations and limitations regarding the application of the Standard There are no special recommendations or limitations regarding the application of this stan
33、dard. d) Description of the structure of the IEC SC 45A standard series and relationships with other IEC documents and other bodies documents (IAEA, ISO) The top-level document of the IEC SC 45A standard series is IEC 61513. It provides general requirements for I b) to ensure that the in-core temper
34、ature measuring system and the sensor installation do not prejudice the safe operation and the availability of the reactor. Statements of general applicability are made but detailed consideration is restricted to thermocouples and RTDs. 2 Normative references The following referenced documents are i
35、ndispensable for the application 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. IEC 60584-1, Thermocouples Part 1: Reference tables IEC 60584-2, Thermocouples Part 2: To
36、lerances BS IEC 60737:201060737 IEC:2010 9 IEC 60584-3, Thermocouples Part 3: Extension and compensating cables Tolerances and identification system IEC 60709, Nuclear power plants Instrumentation and control systems important to safety Separation IEC 60751, Industrial platinum resistance thermomete
37、rs and platinum temperature sensors IEC 60780, Nuclear power plants Electrical equipment of the safety system Qualification IEC 60980, Recommended practices for seismic qualification of electrical equipment of the safety system for nuclear generating stations IEC 61226, Nuclear power plants Instrume
38、ntation and control important to safety Classification of instrumentation and control functions IEC 61513, Nuclear power plants Instrumentation and control for systems important to safety General requirements for systems IEC 61515, Mineral insulated thermocouple cables and thermocouples IEC 62342, N
39、uclear power plants Instrumentation and control systems important to safety Management of ageing IEC 62385, Nuclear power plants Instrumentation and control important to safety Methods for assessing the performance of safety system instrument channels IEC 62397, Nuclear power plants Instrumentation
40、and control important to safety Resistance temperature detectors IEC 62460, Temperature Electromotive force (EMF) tables for pure-element thermocouple combinations 3 Terms and definitions For the purposes of this document, the terms and definitions given in IAEA Safety Glossary edition 2007, IEC 600
41、50-393 and IEC 60050-394 apply as well as the following: 3.1 accuracy of measurement closeness of the agreement between the result of a measurement and the conventionally true value of the measurand IEV 394-40-35 NOTE 1 “Accuracy” is a qualitative concept. NOTE 2 The term “precision” should not be u
42、sed for “accuracy”. 3.2 electrical shunting effect of the shunting of the source impedance of the sensing device by the input impedance of the measuring device and the earth leakage impedance of the sensor BS IEC 60737:2010 10 60737 IEC:2010 3.3 post-accident temperature sensor temperature sensor de
43、signed to withstand and measure very high temperatures, which may be above 1 100 C, that can occur if the fuel elements are not sufficiently cooled 3.4 resistance temperature detector (RTD) detector generally made up of a stainless steel cylindrical barrel protecting a platinum resistor whose resist
44、ance varies with temperature. This detector is placed in the piping containing the fluid whose temperature is measured in this way. It can be directly immersed in the fluid or protected by an intermediate casing called the thermowell NOTE 1 Mounting means or connection heads may be included. The tem
45、perature-sensing resistor can be made of platinum, nickel tungsten, copper, or other metals. However, a platinum sensor is commonly used in the RTD in an NPP; therefore, a platinum resistance thermometer is referred to in this standard. NOTE 2 In this standard, the term “sensor” describes the RTD un
46、it with all its associated protection, for example, barrel or thermowell. For most applications of measuring process fluid temperature in an NPP, the platinum resistor sensor is installed inside a stainless steel thermowell. For air temperature measurement, a direct sensor may be used. IEC 62397, 3.
47、5 3.5 sensitivity for a given value of the measured quantity, ratio of the variation of the observed variable to the corresponding variation of the measured quantity IEV 394-39-07, modified 3.6 service life the period from initial operation to final withdrawal from service of a structure, system or
48、component IAEA Safety Glossary, edition 2007 NOTE The service life for a sensor corresponds to the operational life under irradiation and environmental conditions restricted within specified limits, after which the sensor characteristics exceed specified tolerances. It can be expressed in terms of i
49、ncident particle fluence, time of operation, etc. 3.7 sheathed thermocouple thermocouple embedded in a mineral insulation within a gas-tight, metal protecting tube as a sheath, with the two leads brought out for measurement through a moisture-proof seal 3.8 temperature measuring sensor device, fixed or movable, designed to provide a signal for the measurement of temperature at a defined point in the core
