GB/T 12787-2020 English PDFUS$284.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 12787-2020: Radiation protection instrumentation. Warning equipment for criticality accidents Status: Valid GB/T 12787: Historical versions
Basic dataStandard 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13.280 Word Count Estimation: 15,181 Date of Issue: 2020-11-19 Date of Implementation: 2021-06-01 Older Standard (superseded by this standard): GB/T 12787-1991 Quoted Standard: ISO 7753-1987; IEC 60050-102; IEC 60050-103; IEC 60050-112; IEC 60050-113; IEC 60050-114; IEC 60050-121;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 contentsPreface 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 11ForewordThis 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 equipment1 ScopeThis 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 referencesThe 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. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 12787-2020_English be delivered?Answer: Upon your order, we will start to translate GB/T 12787-2020_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 12787-2020_English with my colleagues?Answer: Yes. 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