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GB/T 12787-2020: Radiation protection instrumentation. Warning equipment for criticality accidents
Status: Valid GB/T 12787: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 12787-2020 | English | 284 |
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Radiation protection instrumentation. Warning equipment for criticality accidents
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GB/T 12787-2020
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| GB/T 12787-1991 | English | 439 |
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Warning equipment for criticality accidents
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GB/T 12787-1991
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PDF similar to GB/T 12787-2020
Basic data | Standard ID | GB/T 12787-2020 (GB/T12787-2020) | | Description (Translated English) | Radiation protection instrumentation. Warning equipment for criticality accidents | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | F84 | | Classification of International Standard | 13.280 | | Word Count Estimation | 15,181 | | Date of Issue | 2020-11-19 | | Date of Implementation | 2021-06-01 | | Older Standard (superseded by this standard) | GB/T 12787-1991 | | Quoted Standard | ISO 7753-1987; IEC 60050-102; IEC 60050-103; IEC 60050-112; IEC 60050-113; IEC 60050-114; IEC 60050-121; IEC 60050-131; IEC 60050-141; IEC 60050-151; IEC 60050-161; IEC 60050-171; IEC 60050-192; IEC 60050-195; IEC 60050-212; IEC 60050-221; IEC 60050-300 | | Adopted Standard | IEC 60860-2014, IDT | | Regulation (derived from) | National Standard Announcement No. 26 of 2020 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | | Summary | This standard applies to equipment that issues alarms by detecting gamma radiation and/or neutrons generated by criticality accidents. This standard is mainly used for the design of equipment and does not involve the layout requirements of the equipment. The layout requirements and usage methods of critical alarm equipment are described in ISO 7753 and ISO 11320. The main purpose of criticality alarm equipment is to detect the radiation produced by criticality accidents and warn people. The equipment should provide appropriate alarms to warn people in the critical accident area and the nearby affected area (usually the entire nuclear facility) when a criticality accident occurs. The purpose of this alarm is to trigger an evacuation alarm to reduce the possibility of personnel being severely exposed. The device can also have auxiliary functions, such as setting up continuous measurement of radiation levels during an accident. The device only does not affect critical alarms and this standard. | GB/T 12787-2020: Radiation protection instrumentation. Warning equipment for criticality accidents
---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.
(Radiation protection equipment Critical accident alarm equipment)
ICS 13.280
F84
National Standards of People's Republic of China
Replace GB/T 12787-1991
Radiation protection equipment critical accident alarm equipment
2020-11-19 released
2021-06-01 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
Table of contents
Preface Ⅲ
1 Scope 1
2 Normative references 1
3 Terms, definitions, quantities and units 1
3.1 Terms and definitions 1
3.2 Quantity and unit 2
4 General requirements 2
4.1 General 2
4.2 Detection requirements 3
4.3 Safety classification 3
4.4 False alarm 3
4.5 Component failure 3
4.6 Easy to decontaminate 4
4.7 Multifunctional system 4
4.8 Connecting cables and connectors 4
4.9 Reliability 4
4.10 Function test 4
4.11 Interchangeability 4
4.12 Detecting component 4
4.13 Signal Processing Logic Unit 4
4.14 Alarm signal unit 4
5 General test methods 5
5.1 Test characteristics 5
5.2 Reference conditions and standard test conditions 5
5.3 Test point 6
5.4 Reference radiation 6
6 Radiation detection requirements 6
6.1 General requirements 6
6.2 Energy response 6
6.3 Alarm time 7
6.4 Detection alarm threshold 7
6.5 Variation of response with incident angle 7
6.6 Overload characteristics 7
7 Environmental requirements 8
7.1 Temperature test without radioactive source or input electronic signal 8
7.2 Environmental test with radioactive source or input electronic signal 8
8 Mechanical requirements 8
9 EMC requirements 8
10 File 9
Reference 11
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 12787-1991 "critical accident alarm equipment", compared with GB/T 12787-1991, the main technical changes
as follows.
---Added the main function description, safety classification requirements and failure mode and impact analysis requirements of the critical alarm system (see 4.1, 4.3 and 4.5);
--- The requirements for false alarms of critical alarm systems have been modified (see 4.4, 4.3 in the.1991 edition);
---Modified the energy response test method for neutron detectors (see 6.2.3.2, 5.1.1.4 of the.1991 edition);
---Modified the requirements and test methods related to environment, machinery and electromagnetic compatibility (see Chapter 7, Chapter 8, and Chapter 9,.1991 edition
5.2, 5.3 and 5.4).
The translation method used in this standard is equivalent to IEC 60860.2014 "Radiation Protection Instrument Critical Accident Alarm Equipment".
The Chinese documents that have a consistent correspondence with the international documents cited in this standard are as follows.
---GB/T 2900 (all parts) Electrical terminology [IEC 60050 (all parts)];
---GB/T 15146.9-1994 Nuclear criticality safety of fissile materials outside the reactor Nuclear criticality accident detection and alarm system
Performance and inspection requirements (eqvISO 7753.1987);
---GB/T 20438 (all parts) Functional safety of electrical/electronic/programmable electronic safety-related systems [IEC 61508 (all parts)];
---GB/T 34138-2017 Environmental, electromagnetic and mechanical performance requirements for radiation protection instruments (IEC 62706.2012, IDT).
This standard has made the following editorial changes.
---According to our country's custom, the expression of the nominal frequency in Table 1, use "94%Fn~110%Fn" instead of "-6%~10%";
--- In 6.2.2.1, use "65%~150%" instead of "-35%~50%".
This standard was proposed and managed by the National Standardization Technical Committee for Nuclear Instruments (SAC/TC30).
Drafting organization of this standard. China Nuclear Power Engineering Co., Ltd.
The main drafters of this standard. Ding Shihai, Wang Ping, Wang Xin.
The previous versions of the standard replaced by this standard are as follows.
---GB/T 12787-1991.
Radiation protection equipment critical accident alarm equipment
1 Scope
This standard applies to equipment that issues an alarm by detecting gamma radiation and/or neutrons produced by criticality accidents.
This standard is mainly used for the design of equipment and does not involve the layout requirements of the equipment. Layout requirements and usage methods of critical alarm equipment
Described in ISO 7753 and ISO 11320.
The main purpose of criticality alarm equipment is to detect the radiation produced by criticality accidents and warn people. The equipment should provide appropriate alarms
When a criticality accident occurs, warn people in the critical accident area and the nearby affected area (usually the entire nuclear facility). The purpose of this alarm is to touch
Send an evacuation alarm to reduce the possibility of personnel being severely exposed.
The device can also have auxiliary functions, such as. setting continuous measurement of radiation levels during an accident.
And the important characteristics described in this standard (for example. reliability), you can use these auxiliary functions.
The goal of this standard is to specify requirements for general characteristics, radiation detection, environment, machinery, electromagnetic compatibility and documentation, and to formulate critical accident reports.
Acceptance criteria for police devices.
This standard does not apply to photon or neutron dose equivalent (rate) measuring instruments or monitors, which are controlled by IEC 60532, IEC 60846 (all
Part), IEC 61017 (all parts) and IEC 61005.This standard also does not apply to equipment for nuclear reactor control and safety systems
And parts.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
ISO 7753.1987 Nuclear energy criticality detection and alarm system performance and inspection requirements
IEC 60050 (all parts) International Electrotechnical Vocabulary
IEC 61508 (all parts) Functional safety of electrical/electronic/programmable electronic safety systems
IEC 62706 Radiation protection instrument environment, electromagnetic and mechanical performance requirements
International Bureau of Weights and Measures. International System of Units, 8th Edition,.2006
3 Terms, definitions, quantities and units
3.1 Terms and definitions
The following terms and definitions defined by IEC 60050-395 apply to this document.
3.1.1
Acceptance test
In order to prove to the customer that the instrument meets the contract test requirements specified in the specification.
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