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GB/T 12789.3-2025 English PDF

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US$219.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 12789.3-2025: Criteria for nuclear reactor instrumentation - Part 3: High temperature gas-cooled reactor
Status: Valid

GB/T 12789.3: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 12789.3-2025	219	Add to Cart	3 days	Criteria for nuclear reactor instrumentation - Part 3: High temperature gas-cooled reactor	Valid
GB/T 12789.3-1992	209	Add to Cart	3 days	Criteria for nuclear reactor reactor instrumentation Part three. High temperature gas-cooled reactor(HTGR)

Similar standards

NB/T 20015 EJ/T 350 EJ/T 306 GB/T 16702.1 GB/T 16702.2 GB/T 12789.1

Basic data

Standard ID: GB/T 12789.3-2025 (GB/T12789.3-2025)
Description (Translated English): Criteria for nuclear reactor instrumentation - Part 3: High temperature gas-cooled reactor
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: F69
Classification of International Standard: 27.120.10
Word Count Estimation: 10,186
Date of Issue: 2025-04-25
Date of Implementation: 2025-11-01
Older Standard (superseded by this standard): GB/T 12789.3-1992
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 12789.3-2025: Criteria for nuclear reactor instrumentation - Part 3: High temperature gas-cooled reactor

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 27.120.20 CCSF69 National Standard of the People's Republic of China Replaces GB/T 12789.3-1992 Nuclear Reactor Instrumentation Guidelines Part 3.High temperature gas-cooled reactors Part 3.Hightemperaturegas-cooledreactor Released on 2025-04-25 2025-11-01 Implementation State Administration for Market Regulation The National Standardization Administration issued

Preface III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 General Requirements 1 5 Neutron Fluence Rate Measurement 1 5.1 General requirements 1 5.2 Neutron Detector 1 5.3 Neutron Fluence Rate Measuring Instrument 1 5.4 Neutron Fluence Rate Level and Cycle Alarm, Control, and Shutdown 2 5.5 Calibration and testing of neutron fluence rate measuring instruments 2 6 Temperature measurement 2 6.1 General requirements 2 6.2 Fuel element temperature measurement 2 6.3 Moderator Temperature Measurement 2 6.4 Coolant temperature measurement 3 6.5 Temperature measurements important to reactor safety 3 6.6 Temperature protection instrument 3 6.7 Temperature display 3 7 Coolant Measurement 3 7.1 General requirements 3 7.2 Coolant flow measurement 3 7.3 Coolant pressure measurement 3 7.4 Coolant level measurement 3 7.5 Coolant Leakage 3 7.6 Coolant purity 4 7.7 Coolant radioactivity 4 7.8 Coolant humidity monitoring 4 8 Protection system 4 8.1 Emergency shutdown system 4 8.2 Special safety device drive system 4 9 Instrument power source 5 10 Control facilities and alarm systems 5

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document is part 3 of GB/T 12789 “Criteria for nuclear reactor instrumentation”. GB/T 12789 has been published in the following parts. --- Part 1.General principles; --- Part 2.Pressurized water reactor; --- Part 3.High temperature gas-cooled reactor; --- Part 4.Liquid metal cooled fast reactor. This document replaces GB/T 12789.3-1992 "Criteria for Nuclear Reactor Instrumentation Part 3.High Temperature Gas-Cooled Reactors" and Compared with GB/T 12789.3-1992, in addition to structural adjustments and editorial changes, the main technical changes are as follows. --- Changed the description of the scope (see Chapter 1, Chapter 1 of the.1992 edition); --- Changed the description of fuel temperature measurement (see 6.2, 5.3 of the.1992 edition); --- Changed the description of coolant temperature measurement (see 6.4, 5.5 of the.1992 edition); --- Added description of temperature measurements important to reactor safety (see 6.5); --- Changed the coolant flow measurement method examples (see 7.2, 6.2 of the.1992 edition); --- Modified the conditions and special actions for triggering emergency shutdown of the reactor coolant system coolant leakage (see 7.5.2,.1992 edition 6.5.2); --- Deleted the description of protection actions (see 6.8.1 of the.1992 edition); --- Changed the description of coolant humidity monitoring (see 7.8,.1992 edition, 6.8.2); --- Changed the emergency shutdown monitoring parameters (see 8.1, 7.1 of the.1992 edition); --- Changed the description of the dedicated safety facilities (see 8.2, 7.2 of the.1992 edition); --- Deleted the relevant description of reactor control (see Chapter 11 of the.1992 edition). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed and coordinated by the National Technical Committee for Standardization of Nuclear Instruments (SAC/TC30). This document was drafted by Tsinghua University and China National Nuclear Energy Technology Co., Ltd. The main drafters of this document are. Li Fu, Huang Xiaojin, Sun Yanfei, Li Duo, Li Boyuan, Xiong Huasheng, Shi Qi, Gao Xu, Xiong Degui and Chen Jing. The previous versions of this document and the documents it replaces are as follows. ---First published in.1992 as GB/T 12789.3-1992; ---This is the first revision.

Introduction

GB/T 12789 "Guidelines for Nuclear Reactor Instrumentation" is intended to consist of four parts. --- Part 1.General principles. The purpose is to specify the principles necessary for the safe operation of pressurized water reactors, high temperature gas-cooled reactors, and liquid metal-cooled fast reactors. The required special instruments and general principles of their application. --- Part 2.Pressurized water reactor. The purpose is to supplement Part 1 and specify the general requirements for pressurized water reactor type instrumentation and its application. in principle. --- Part 3.High temperature gas-cooled reactor. The purpose is to supplement Part 1 and specify the instrumentation and General principles for its application. --- Part 4.Liquid metal cooled fast reactor. The purpose is to supplement Part 1 and specify the fast reactor instrumentation and its application. General principles. Nuclear Reactor Instrumentation Guidelines Part 3.High temperature gas-cooled reactors

1 Scope

This document specifies the general requirements for the special instruments and their applications necessary for the safe operation of high temperature gas-cooled reactors, including general requirements, medium Related requirements for sub-injection rate measurement, temperature measurement, coolant measurement, protection system, instrument power source, control facilities and alarm system. This document applies to the design and implementation of instrumentation and controls for indirect cycle high temperature gas-cooled reactors.

2 Normative references

The contents of the following documents constitute essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 12789.1-2025 Nuclear reactor instrumentation standards Part 1.General principles GB/T 13284 Nuclear power plant safety system design criteria

3 Terms and definitions

There are no terms or definitions that require definition in this document.

4 General requirements

The overall requirements for high temperature gas-cooled reactors should meet the requirements of 4.1 to 4.6 in GB/T 12789.1-2025.

5 Neutron Fluence Rate Measurement

5.1 General requirements Neutron fluence rate measurement should meet the requirements of 5.1 in GB/T 12789.1-2025. 5.2 Neutron Detector Neutron detectors should meet the requirements of 5.2 in GB/T 12789.1-2025. 5.3 Neutron Fluence Rate Measuring Instrument 5.3.1 General requirements Neutron injection rate measuring instruments should meet the requirements of 5.3.1 in GB/T 12789.1-2025. 5.3.2 Linear current measuring instrument Linear current measuring instruments should meet the requirements of 5.3.2 in GB/T 12789.1-2025. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 12789.3-2025_English be delivered?

Answer: Upon your order, we will start to translate GB/T 12789.3-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 12789.3-2025_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 12789.3-2025_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 12789.3-2025?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 12789.3-2025 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.