GB/T 15972.54-2021 English PDFUS$209.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 15972.54-2021: Specifications for optical fibre test methods - Part 54: Measurement methods and test procedures for environmental characteristics - Gamma irradiation Status: Valid GB/T 15972.54: Historical versions
Basic dataStandard ID: GB/T 15972.54-2021 (GB/T15972.54-2021)Description (Translated English): Specifications for optical fibre test methods - Part 54: Measurement methods and test procedures for environmental characteristics - Gamma irradiation Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: M33 Word Count Estimation: 11,158 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 15972.54-2021: Specifications for optical fibre test methods - Part 54: Measurement methods and test procedures for environmental characteristics - Gamma irradiation---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. Specifications for optical fibre test methods-Part 54.Measurement methods and test procedures for environmental characteristics-Gamma irradiation ICS 33.180.10 M33 National Standards of People's Republic of China Replace GB/T 15972.54-2008 Optical fiber test method specification part 54. Environmental performance measurement methods and test procedures Gamma irradiation (IEC 60793-1-54.2018,Opticalfibres-Part 1-54. Released on 2021-04-30 and implemented on 2021-11-01 State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee Table of contentsForeword Ⅰ 1 Scope 1 2 Normative references 1 3 Background overview 1 4 Test device 1 5 Samples and sample preparation 3 6 Test procedure 4 7 Calculation 5 8 Results 6 Reference 7ForewordGB/T 15972 "Specifications for Optical Fiber Test Methods" consists of several parts, and its expected structure and corresponding international standards are. ---Part 10~Part 19.General principles of measurement methods and test procedures (corresponding to IEC 60793-1-10 to IEC 60793- 1-19); ---Part 20~Part 29.Measurement methods and test procedures of dimensional parameters (corresponding to IEC 60793-1-20 to IEC 60793- 1-29); ---Part 30~Part 39.Measurement methods and test procedures of mechanical properties (corresponding to IEC 60793-1-30 to IEC 60793- 1-39); ---Part 40~Part 49.Measurement methods and test procedures of transmission characteristics (corresponding to IEC 60793-1-40 to IEC 60793- 1-49); ---Part 50~Part 59.Environmental performance measurement methods and test procedures (corresponding to IEC 60793-1-50 to IEC 60793- 1-59). Among them, GB/T 15972.50~59 currently consists of the following parts. ---Part 50.Measurement methods and test procedures for environmental performance constant damp heat; ---Part 51.Environmental performance measurement methods and test procedures dry heat; ---Part 52.Environmental performance measurement methods and test procedures temperature cycling; ---Part 53.Measurement methods and test procedures for environmental performance immersion in water; ---Part 54.Measurement methods and test procedures for environmental performance Gamma irradiation; --- Part 55.Environmental performance measurement methods and test procedures Hydrogen aging. This part is part 54 of GB/T 15972. This section was drafted in accordance with the rules given in GB/T 1.1-2009. This part replaces GB/T 15972.54-2008 "Specification for optical fiber test methods-Part 54.Environmental performance measurement methods and tests Procedural Gamma Irradiation. Compared with GB/T 15972.54-2008, the main technical changes in this part are as follows. ---The normative references of GB/T 15972.46 have been added (see Chapter 2); ---Added Chapter 3 background overview (see Chapter 3); --- Deleted Appendix A and put the content in the newly added Chapter 3 (see Appendix A of the.2008 edition); ---Added the danger warning in the overview part of the experimental device (see 4.1); ---Deleted the specific requirements of the light source, optical filter/monochromator (see 3.2, 3.3 of the.2008 edition); --- Amend "A2.1 and A2.2 multimode fiber (refractive index quasi-abrupt and abrupt)" to "A2 multimode fiber (refractive index quasi-abrupt)" Mutations and mutants)” (see 4.8.2, 3.7.3 of the.2008 edition); ---Modified the optical power requirements of the light source coupled into the sample, and changed "not greater than 1.0μW" to "equal to 1.0μW" (see 4.10,.2008 3.9 of the year edition); ---Added the uniform requirements for the length of environmental background radiation test specimens and hazardous nuclear environmental test specimens (see 5.2); ---The requirements for the test shaft and alternative placement method are modified, and the diameter of the test spool is not less than 10cm, and the alternative placement method should be Consider the minimum bend radius of the fiber (see 5.3, 4.4 in the.2008 edition); ---Deleted the provisions of the inspection equipment for the calibration of the radiation source (see 5.1 in the.2008 edition); ---Added an overview of the test procedure (see 6.1); ---Added the requirement for the total attenuation fluctuation after the end of radiation, stipulating that the total fluctuation should be less than 10% of the total attenuation caused (see 6.3.2); ---The test method requirements for light transmittance changes have been added, and the light transmittance changes of harmful nuclear radiation effects exposed to gamma radiation have been specified It should be carried out in accordance with the method of GB/T 15972.46 (see 6.5); --- Added reference IEC /T R62283 (see References). This part uses the redrafting method to modify and adopt IEC 60793-1-54.2018 ``Optical Fiber Part 1-54.Measurement Methods and Tests Procedural Gamma Irradiation. Compared with IEC 60793-1-54.2018, the main structural differences and reasons for this part are as follows. ---Move the description of the relevant background in the scope to Chapter 3 "Background Overview" of this part (see Chapter 3, Chapter 1 of the IEC document); --- Deleted Chapter 3 "Terms and Definitions" because there is no actual content (see Chapter 3 of the IEC document); ---Chapter 9 "Specification Information" is deleted, because the relevant requirements have been incorporated into Chapter 8 "Results" of this part (see Chapter 9 of the IEC document chapter). The technical differences between this part and IEC 60793-1-54.2018 and the reasons are as follows. ---Regarding normative reference documents, this section has made adjustments with technical differences to adapt to my country's technical conditions and adjustments It is concentratedly reflected in Chapter 2 "Normative Reference Documents", and the specific adjustments are as follows. ● Replace IEC 60793-1-40 with GB/T 15972.40 which is modified to adopt international standards; ● Replace IEC 60793-1-44 with GB/T 15972.44 modified to adopt international standards; ● Replace IEC 60793-1-46 with GB/T 15972.46 modified to adopt international standards; ● Deleted IEC 61280-4-1, because this part does not reference the standard (see Chapter 2 of the IEC document). Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying these patents. This part was proposed by the Ministry of Industry and Information Technology of the People's Republic of China. This part is under the jurisdiction of the National Communication Standardization Technical Committee (SAC/TC485). Drafting organizations of this section. Fiberhome Technology Group Co., Ltd., National Nuclear Automation System Engineering Co., Ltd., China General Nuclear Power Engineering Co., Ltd. The main drafters of this section. Liu Cheng, Yao Di, Chen Liming, Xu Weiying, Ruan Hua, Ma Jinna, Zhang Yichi, Wan Liang, Qi Wei, Bai Wenjie. The previous releases of the standards replaced by this part are as follows. ---GB/T 15972.54-2008. Optical fiber test method specification part 54. Environmental performance measurement methods and test procedures Gamma irradiation1 ScopeThis part of GB/T 15972 specifies the measurement methods and test procedures for evaluating the performance of optical fibers and cables in a given gamma radiation environment. This part is applicable to the determination of cabled or uncabled type A1, A2 type multimode fiber and type B single-mode fiber due to exposure to gamma radiation. The raw radiation induction attenuation value. This section does not apply to the measurement of non-light-transmitting component materials in optical cables. If the optical cable material is exposed to radiation, it will If deterioration occurs, further research and other measurement methods are needed. Note. The applicability of this test to other types of optical fibers is under study. Refer to IEC /T R62283 for detailed background information.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 reference documents, the latest version (including all amendments) is applicable to this document. GB/T 15972.40-2008 Optical fiber test method specification Part 40.Transmission characteristic measurement method and test procedure Attenuation (IEC 60793-1-40.2001, MOD) GB/T 15972.44 Specification for optical fiber test methods Part 44.Measurement methods and test procedures for transmission characteristics Cut-off wavelength (GB/T 15972.44-2017, IEC 60793-1-44.2011, MOD) GB/T 15972.46 Optical fiber test method specification Part 46.Transmission characteristic measurement method and test procedure Transmittance change (GB/T 15972.46-2017, IEC 60793-1-46.2001, MOD)3 Background overviewWhen exposed to gamma radiation, the attenuation of cabled or uncabled fiber will usually increase. This is mainly due to the defects in the glass It is caused by trapping electrons and holes decomposed by radiation (that is, forming a "color center"). This test procedure includes two main states. suitable for evaluation Estimate the low-dose state of the environmental background radiation effects and the high-dose state suitable for evaluating the harmful nuclear environmental effects. Adopt similar to Method A (cut-off method) in GB/T 15972.40-2008 can be used to test the effects of environmental background radiation. By monitoring the test specimens exposed to The power before, after and during gamma irradiation can be used to test harmful nuclear environmental effects. Reduction of color centers caused by light (photobleaching) or heat The recovery effect (reduce the attenuation of radiation induction). The recovery effect can occur in a wide time range, which depends on the irradiation time and annealing temperature. degree. This complicates the characteristics of attenuation changes caused by irradiation, because attenuation is related to many variables, including test environment temperature, sample The structure, the total dose and dose rate applied to the specimen, and the level of light used to measure it.4 Test device4.1 Overview When carrying out this test in the laboratory, strict control and appropriate protective measures should be taken. Should be entered by carefully selected and well-trained personnel Run this test. If the operation is improper or there is no qualified conditions, this test is dangerous for the test personnel. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 15972.54-2021_English be delivered?Answer: Upon your order, we will start to translate GB/T 15972.54-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. 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