Publication details
| Publication CODE |
Title |
| NBN EN IEC 60793-1-54:2018 (2018-03) |
OPTICAL FIBRES - PART 1-54: MEASUREMENT METHODS AND TEST PROCEDURES - GAMMA IRRADIATION |
| |
| Price Excl. VAT |
Total number of pages, tables and drawings |
|
25.00 €
|
3. |
Description
NEW!IEC 60793-1-54:2018 is available as IEC 60793-1-54:2018 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 60793-1-54:2018 outlines a method for measuring the steady state response of optical fibres and optical cables exposed to gamma radiation. It can be employed to determine the level of radiation-induced attenuation produced in Class B single-mode or Class A, category A1 and A2 multimode optical fibres, in either cabled or uncabled form, due to exposure to gamma radiation. The attenuation of cabled and uncabled optical fibres generally increases when exposed to gamma radiation. This is primarily due to the trapping of radiolytic electrons and holes at defect sites in the glass (i.e. the formation of "colour centres"). This test procedure focuses on two regimes of interest: the low dose rate regime suitable for estimating the effect of environmental background radiation, and the high dose rate regime suitable for estimating the effect of adverse nuclear environments. The testing of the effects of environmental background radiation is achieved with an attenuation measurement approach similar to IEC 60793-1-40 method A, cut-back. The effects of adverse nuclear environments are tested by monitoring the power before, during and after exposure of the test sample to gamma radiation. The depopulation of colour centres by light (photo bleaching) or by heat causes recovery (lessening of radiation induced attenuation). Recovery can occur over a wide range of time which depends on the irradiation time and annealing temperature. This complicates the characterization of radiation induced attenuation since the attenuation depends on many variables including the temperature of the test environment, the configuration of the sample, the total dose and the dose rate applied to the sample and the light level used to measure it. This test is not a material test for the non-optical material components of a fibre optic cable. If degradation of cable materials exposed to irradiation is studied, other test methods will be used. This test method is written to contain a clear, concise listing of instructions. The background knowledge that is necessary to perform correct, relevant and expressive irradiation tests as well as to limit measurement uncertainty is presented separately in IEC TR 62283. This third edition cancels and replaces the second edition published in 2012. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- test conditions related to photobleaching have been changed;
- the test length has been modified to yield a total induced attenuation in the test sample at the end of the irradiation between 3 dB and 10 dB.
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| Class |
C
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Available files
ATTENTION: Belgian registered standards (NBN EN or NBN HD) are generally
only available in English or French. Only the cover page is translated
and the document itself is in English or in French.
Very important notice: 98% of the text of the NBN EN 55XXX,
NBN EN 6XXXX comes from the IEC text which is NOT included.
This text can be ordered here:
IEC 60793-1-54:2018.
For the series NBN EN 50XXX, the standards are however complete.
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DE version
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EN version
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FR version
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Status
| Status |
Registered trilingual Belgian standard EN or FR or DE |
| Situation |
Currently active
Replaces
NBN EN 60793-1-54:2013
|
|
Origin
| Committee |
TC 86/SC 86A
FIBRES AND CABLES (optical)
|
| Responsible |
Monsieur POLART Jules, Ingénieur
Chaussée de Brunehault, 380
7140
MORLANWELZ
Phone: 064 / 45 16 83
Fax: 064 / 45 16 83
E-mail: jules.polart@ceb-bec.be
|
Approval
| BEC Approval |
2018-02-16 |
| NBN Approval |
2018-04-27 |
| Belgian Official Journal |
2018-06-11 |
| Registration |
185566 |
| ICS-Code (International Standards Classification) |
33.180.10
|
| NBN Status |
New |
|
| Date of ratification (d.o.r.) |
2018-02-16 |
| Date of availability (d.a.v.) |
2018-03-23 |
| Date of announcement (d.o.a.) |
2018-05-16 |
| Date of publication (d.o.p.) |
2018-11-16 |
| Date of withdrawal former edition (d.o.w.) |
2021-02-16 |
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Correspondences with international standards
| Relation |
International standard |
Date |
| is identical to |
EN IEC 60793-1-54:2018
|
2018-03-23 |
| is identical to |
IEC 60793-1-54:2018
|
2018-01-12 |
Relations to belgian/foreign publications
| Type |
Origin |
Code |
Date |
| Standard |
Belgium |
EN 60793-1-44 |
|
| Standard |
Belgium |
EN 60793-1-46 |
|
| Document |
Foreign |
prEN 60793-1-40 |
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