Kampala, Uganda, 23 June 2014 NATIONAL CAMPAIGN TO MEASURE NON- IONIZING RADIATION FROM RADIO INSTALLATIONS DALLY Brice Landry Technical Director VALSCH Consulting Côte d’Ivoire [email protected]ITU Regional Standardization Forum for Africa (Kampala, Uganda, 23-25 June 2014)
25
Embed
NATIONAL CAMPAIGN TO MEASURE NON-IONIZING RADIATION FROM RADIO INSTALLATIONS
ITU Regional Standardization Forum for Africa (Kampala, Uganda, 23-25 June 2014). NATIONAL CAMPAIGN TO MEASURE NON-IONIZING RADIATION FROM RADIO INSTALLATIONS. DALLY Brice Landry Technical Director VALSCH Consulting Côte d’Ivoire [email protected]. CONTENT OF PRESENTATION. - PowerPoint PPT Presentation
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Kampala, Uganda, 23 June 2014
NATIONAL CAMPAIGN TO MEASURE NON-IONIZING RADIATION FROM
MISSION OBJECTIVESSCOPE OF ACTIVITY CONDUCTEDANTICIPATED DURATIONEXPECTED DELIVERABLES
IMPLEMENTATION AND RESULTS OF MISSION CONCLUSION AND RECOMMENDATIONS
Kampala, Uganda, 23 June 2014 3
Within the framework of its control mission and its 2012 activities, ATCI (now restructured to form ARTCI and AIGF pursuant to Decree No. 2012-293 of 21 March 2012 on Telecommunications and Information and Communication Technologies) chose the company VALSCH Consulting to support it in carrying out a National Campaign to Measure Non-Ionizing Radiation from Radio Installations.This presentation provides an overview of the terms of reference of the 2012 measurement campaign and a synthesis of the results obtained.
CONTEXT
Kampala, Uganda, 23 June 2014 4
TERMS OF REFERENCE
MISSION OBJECTIVESEvaluate the levels of exposure of populations to electromagnetic fields;Check the compliance of populations’ exposure levels with normative requirements (exposure limits);Map the field strength levels.
Kampala, Uganda, 23 June 2014 5
TERMS OF REFERENCESCOPE OF ACTIVITY CONDUCTED
The mission was dimensioned so as to cover 122 measurement points divided into two (2) groups spread over 22 Côte d’Ivoire communes.
Table 1: Distribution of measurement points by group and by commune
GROUP I GROUP II
NUMBER OF POINTS NUMBER OF POINTS
TOTAL NUMBER OF MEASUREMENT POINTS
TOTAL NUMBER OF MEASUREMENT POINTS
Kampala, Uganda, 23 June 2014 6
TERMS OF REFERENCEDURATION OF MISSION
Eight (08) weeks broken down as follows:Six (06) weeks of research in the field;Two (02) weeks of data processing and analysis.
NORMATIVE REFERENCESCENELEC standard (EN 50492): Basic standard for the in-situ measurement of electromagnetic field strength related to human exposure in the vicinity of base stations.
Kampala, Uganda, 23 June 2014 7
TERMS OF REFERENCE
Figure 1: Flowchart of measurement process
Choice of location
Analysis of location
Global evaluation of exposure
Broadband measurement
Result of measurement
Choice of locationDetailed evaluation of
exposure
Selective measurement
Extrapolation
Informative evaluation of field strength levels by service
Measurement by service integration
Determination of measurement uncertainty
Elaboration of measurement report
<3 V/m
<−3 V/m
Kampala, Uganda, 23 June 2014 8
TERMS OF REFERENCEInternational Council on Non-Ionizing Radiation Protection (ICNIRP) guidelines on exposure limits for the general public and workers – 1998.
Table 2: Formula for calculating the reference levels set by ICNIRP
Frequencyrange
Equivalent plane wavepower density
Seq(W/m2)
Kampala, Uganda, 23 June 2014 9
TERMS OF REFERENCE
EXPECTED DELIVERABLES
Order N° Heading Quantity
01 Site measurement report 122
02 Mapping of field strength levels
1
03 Synthesis report 1
Table 3: Summary of expected deliverables
Kampala, Uganda, 23 June 2014 10
IMPLEMENTATION AND RESULTS OF MISSION
IMPLEMENTATIONORGANIZATION AND WORKING METHOD
A steering committee and field follow-up team were established in order to ensure that the mission was carried out in the required manner.
Seventeen (17) high-level ressources (engineers, technicians and legal experts) were employed operationally within the framework of this mission.
Kampala, Uganda, 23 June 2014 11
IMPLEMENTATION AND RESULTS OF MISSION
The ressources worked from 2 January to 26 February 2013 in physical meetings and conference calls, addressing the start-up, progress made, refocusing, and winding up of the mission.
SCOPE OF ACTIVITIES CONDUCTEDIn accordance with the initial distribution in the terms of reference, 122 points were indeed measured.
Kampala, Uganda, 23 June 2014 12
IMPLEMENTATION AND RESULTS OF MISSION
CHOICE OF MEASUREMENT POINTS
Eligibility conditions1. Density of radio installations;2. Sensitivity of location (area of
conflict with local populations, school, hospital,….);
3. Busy area; 4. Public accessibility
(indoor/outdoor)5. Global exposure level (> 0,3 V/m).
Figure 2: Concept of area and of signage
Prohibitedarea
Restrictedaccessarea
Area open togeneral public
Signagefor
generalpublic
Kampala, Uganda, 23 June 2014 13
IMPLEMENTATION AND RESULTS OF MISSION
Consultation of databaseBased on ATCI’s distribution of the measurement points over all the communes selected, VALSCH Consulting proceeded as follows: 1.Mapped the location of 3632 multi-technology (GSM, WiMAX and UMTS) radio sites in operation;2.Identified locations with a high density of radio sites;3.Divided the mapping up into several areas;4.Consulted the database of complaints.
Kampala, Uganda, 23 June 2014 14
IMPLEMENTATION AND RESULTS OF MISSION
Research (in situ)
1.Visual identification coupled with rapid analysis using broadband field metre for each candidate measurement point;2.Competitive selection between three (3) candidates per measurement point retained.
Kampala, Uganda, 23 June 2014 15
IMPLEMENTATION AND RESULTS OF MISSION
Measurement points: Classroom, kindergarten, hospital room, private residence, market, café, public areas
Figure 3 : National mapping of measurement sites
Figure 4 : Mapping of measurement sites Abidjan district
In light of the values obtained in the broadband measurements (all below 3 V/m) and in accordance with the measurement process flowchart, no detailed measurement was effected.All the measurements were effected with a view to making an informative evaluation of the field strength levels by service.Thus, the channel power was processed and the equipment de-noised by applying the channel power processing (CPP) formula in Annex D 3.2 to standard EN 50492, whose linear transcription is as follows:
Kampala, Uganda, 23 June 2014 20
IMPLEMENTATION AND RESULTS OF MISSION
In which [(Fmax-Fmin)/((Number of points SA-1) x RBW)] is the RBW filter imperfections correction parameter and SA designates spectrum analyser.
For evaluation of compliance with exposure limits, Annex K to standard EN 50492 prescribes:
In which Ef is the electric field strength at frequency f and EL.f is the corresponding limit.
((Number of points SA-1) Threshold
Kampala, Uganda, 23 June 2014 21
IMPLEMENTATION AND RESULTS OF MISSION
ASSESSMENT OF ELECTROMAGNETIC FIELD STRENGTHS
Figure 7 : Summary histogram of levels of field strengths measured
Electric field strength
V/m
Measu
rem
ent p
oin
ts
Kampala, Uganda, 23 June 2014 22
IMPLEMENTATION AND RESULTS OF MISSION
EXTRACT OF DOMINANT FIELD STRENGTH VALUES
The dominant levels were obtained in the service bands: PMR beacon, aeronautical radionavigation excluding TV, WLL and radiolocation.At the opposite extreme, the lowest field strength value was obtained at measurement point KORHOGO-05, with a value of 0.24794558 V/m .
Kampala, Uganda, 23 June 2014 23
IMPLEMENTATION AND RESULTS OF MISSION
The highest exposure level was obtained at point ADJAME-04, with a total exposure of 11%.
Figure 8 : Summary histogram of exposure levels
Measu
rem
ent p
oin
ts
Total exposure
Conclusion and recommendations
Upon completion of this measurement campaign, we conclude that at the places, dates and times of the measurements, the field strength levels measured comply with the exposure limits set by ICNIRP.
We take this opportunity to encourage telecommunication regulators to implement best practices through similar campaigns aimed at applying the precautionary principle.