Information System on Occupational Exposure in Medicine, Industry & Research - ISEMIR

Transcription

1 Information System on Occupational Exposure in Medicine, Industry & Research - ISEMIR TM on ORP for Itinerant Workers, November 2011 John Le Heron Radiation Protection of Patients Unit NSRW, International Atomic Energy Agency

2 Background to ISEMIR - 1 There are some areas in medicine, industry and research where radiation uses can lead to significant occupational exposures Both in normal operations and in accident situations But detailed information at the operational level is lacking

3 Background to ISEMIR - 2 Arising from IAPORP Based on experience of ISOE (NPP operators) A database containing operational occupational doses at a detailed level is very helpful for: Comparing doses for specific occupations/functions Assessing the impact of radiation protection actions Following dose trends A tool for the implementation of optimization of ORP

4 ISEMIR the launch January 2009, for an initial 3 year period, to help improve occupational radiation protection in targeted areas 2 Working Groups, initially Interventional Cardiology, commenced Feb 2009 Industrial Radiography, commenced Jan 2010

5 Aims of each Working Group Included: Worldwide overview of occupational exposures in each of the targeted areas Establish a system for regular collection of occupational doses in each of the targeted areas an international database Improve implementation of optimization of occupational radiation protection in each of the targeted areas

6 WGIC

7 WGIC initial survey 2009 Survey of Interventional Cardiology Considerable scope for improvement in occupational radiation protection in IC Implications for world-wide IC dose database RB not the best source of dose data Compliance with wearing dosimeters an issue

8 WGIC regular dose data collection in IC Data collection method IC facilities directly Better identification of persons, occupations, roles Better control over the dosimetry Some scope for assessing wearing compliance Need to convince the facilities re the added value of participating Pilot test Dec 2009 March rd WGIC meeting, 1-3 March 2010 Extended pilot test, until March 2011

9 Extended pilot test of IC facilities > 100 Interventional Cardiology Facilities approached 26 Interventional Cardiology Facilities participated Dose and workload data 250 interventional cardiologists 50 electrophysiologists 50 nurses 50 radiographers

10 Effective dose data IC Drs, Staff 300 ± 50 procedures per year: 22 IC, S Annual effective dose (msv): Average = 2.56 ± 3.93 Median = 0.78 Range: % had zero dose

11 Lens doses IC & EP Drs direct and inferred n 265 mean 5.4 msv SD 9.6 min 0 median 1.4 max 87 Lens dose % > 10 msv 20% > 20 msv 8% 76 had zero lens dose - Good practice? - Poor compliance?

12 Metric for assessing optimization of ORP in IC Dose per procedure n Mean (µsv/proc) CV % Max IC all IC, consultant IC, consultant - with QA filter Max E/procedure is an indication of high potential exposures in cathlabs About 50% of data were of poor quality a need for QA filtering

13 WGIR

14 WG on Industrial Radiography aims Similar to the WGIC, but: In addition to doses due to normal exposure, also The risk of exposure due to accidents

15 Development of three questionnaires Respectively addressed to: Regulatory Bodies Operating Companies (Licensees) Industrial Radiography Operators

16 Main topics of questionnaires Radiation Protection Training Incidents Systems & Procedures Individual and Workplace monitoring Control of sources Emergency Preparedness & Response

17 Various language versions Operator Company Regulatory Body English X X X German X X French X X Portuguese X X Spanish X X Dutch X Russian X X Chinese X X

18 Responses Operators Operator Questionnaire Companies Member States Company Questionnaire Companies Member States Regulatory Bodies Worldwide *

19 A few interim conclusions Operator Questionnaire respondents 95% felt sufficiently well qualified to work safely 90% felt well prepared for emergency situations 20% had had a deviation, near miss and/or accident in the last five years On average 8 accidents per 1,000 operators per year Company Questionnaire Re itinerant radiographers 77 out of 95 NDT companies 0 itinerant workers 4 NDT companies stated 1, 1, 10, 15 itinerant workers respectively 14 gave no answer

20 Personal monitoring All RBs required personal monitoring with passive dosimeters 80% (45 out of 56) also required active dosimeters With at least audible alarm capability All Companies provided passive dosimeters Over 90% (82 out of 88) provided active dosimeters Almost all with at least audible alarms About two thirds also with visual alarms

21 Operator, Company & RB dose data No. persons % 5 msv Operators Companies RBs

22 Metric for assessing optimization of ORP in IR - Occupational dose per exposure Excluding data for workloads < 100 exposures per year 100 exp/y Mean Std Dev All γ - only X-Ray only NDT NDT NDT

23 An additional tool Road Map for NDT facilities A facility completes an on-line questionnaire Receives a rating based on the 3 rd quartile results of the 2010 survey Accessible thru ORPNET

24 International Database

25 International database for targeted areas Interventional Cardiology Industrial Radiography Separate modules in the idb More in the future?

26 ISEMIR idb - purpose Tool for optimization of Occupational RP Primarily for the end-user Not for assessing compliance with dose limits Complementary to UNSCEAR Based around individual facilities Interventional Cardiology facilities NDT facilities

27 A balance Avoiding collecting unnecessary data, but Ensuring sufficient resolution to allow useful analysis And hence to provide information to improve the implementation of optimization in ORP

28 ISEMIR idb In each facility Individual workers Occupational doses RP practice Individual s metric: Dose per procedure Workload Doses Individual s attributes: Professional training RP training Role RP habits/practice

29 For each facility: Annual input of data: Facility data updated as needed For each person at the facility: Dose information Workload information Other information updated Individuals and facilities are anonymised in idb An individual is not tracked by idb from year to year

30 ISEMIR idb incidents in IR Additional module in the database A tool to provide information that should lead to a reduction in the occurrence of incidents in Industrial Radiography, including Examples of incidents for training The ability to search for incidents related to a given factor, such as cause, equipment, conditions Providing details on actual corrective actions implemented Promotion of lessons learned

31 Analysis and reporting - 1 Global & regional analysis of occupational dose (annual, monthly) based on any of: Professional training, role, workload, RP training, use of RP tools, sources used, type of work,. Capability of setting quality assessment factors to filter raw data

32 Analysis and reporting - 2 For a given facility: Benchmarking own facility against global/regional data, based on. Benchmarking an individual from own facility against global/regional data, based on.

33 ISEMIR the next steps International Database Development Promotion Report on WGIR survey Report of WGIC pilot survey Expansion to other targeted areas

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