Brian Ahier (OECD Nuclear Energy Agency, ISOE Joint Secretariat)

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Presentation transcript:

Information System on Occupational Exposure The ISOE Occupational Exposure Database Brian Ahier (OECD Nuclear Energy Agency, ISOE Joint Secretariat) Caroline Schieber; Lucie D’Ascenzo (ISOE European Technical Centre, CEPN) 2008 ISOE International ALARA Symposium Tsuruga, Japan (13-14 Nov 2008)

ISOE Context “... the exchange and analysis of information on individual and collective radiation doses to the personnel of nuclear installations and to the employees of contractors, as well as on dose-reduction techniques, is essential to implement effective dose-control programmes and to apply the ALARA principle...” (ISOE Terms and Conditions, 2008)

ISOE Background and Objective Created in 1992 by OECD/NEA as a forum for RP experts from utilities and regulatory authorities world-wide to share dose reduction information & coordinate projects to improve optimisation of worker radiological protection at NPPs Promoted and sponsored by NEA and IAEA IAEA supports participation of 11 non-OECD countries ISOE Terms and Conditions (2008-2011) in process of renewal Four ISOE technical centres support local members Asia, Europe, North America, IAEA ISOE Official Participants under ISOE Terms and Conditions (Dec 2007) 69 Participating Utilities in 29 countries 334 operating units; 45 shutdown units Participating Authorities of 25 countries

ISOE Programme ISOE facilitates occupational exposure management at NPPs through collection and analysis of worker dose data and trends worldwide; exchange of operational experience: World’s largest occupational exposure database for commercial NPPs An information exchange programme for sharing dose reduction information and experience ISOE products support: Dose trend analyses, benchmarking, technique comparisons Application of ALARA and good work management in local radiation protection programmes

Annual and Topical Reports ISOE Products ISOE Databases Technical Analyses Technical Support ISOE ALARA Symposia Annual and Topical Reports ISOE Network

ISOEDAT occupational exposure database ISOE Database World’s largest database on occupational exposure at commercial NPPs ISOEDAT occupational exposure database 471 reactor units 395 operating units; 76 shutdown units Database covers of ~ 91% of total power reactors (439) in commercial operation Includes data for participants & some non-participants (UK, US) Covers period from 1957-present Source of earlier data: EC ORP programme, ISOE participants Based on annual collection of operational dose data at the site, unit, job and task level

What is in the ISOEDAT Database? ISOE 1: Dosimetric information from commercial NPPs in operation, shut down or in some stage of decommissioning, including: annual collective dose for normal operation maintenance/refuelling outage unplanned outage periods annual collective dose for certain tasks and worker categories ISOE 2: Plant-specific information relevant to dose reduction, such as materials, water chemistry, start-up/shutdown procedures, cobalt reduction programme, etc. ISOE 3: Radiation protection related information for specific operations, jobs, procedures, equipment or tasks (radiological lessons learned): effective dose reduction effective decontamination implementation of work management principles

Who Can Access the Database? ISOE Participants can access the DB on-line (ISOE website) and on CD-ROM (Microsoft ACCESS) Web version is routinely updated CD-ROM is distributed annually after all data received A set of pre-defined data queries facilitates trend analysis, benchmarking between plants, sister units, etc. Participating Utilities: Full access to global database (ISOE 1, 2, 3) Participating Authorities: Full access to ISOE 1 data from national licensees Limited access to ISOE 1 data from other countries General information, annual dose statistics, information about external and internal dose

Database Analyses and Benchmarking The extensive data in ISOEDAT provides a solid basis for analyses on issues in operational RP such as dose trends, doses related to certain jobs and tasks, identification of good performance, etc Several ways to use the database: MADRAS: Main trends in occupational exposure Direct access to ISOE 1 questionnaires, including contact information and complementary data For more complex analyses: Direct access to DB, requests to the technical centres, RP forum, …

a) MADRAS Data Analysis Module Pre-defined queries for trend analysis and benchmarking

a) MADRAS Data Analysis Module Summary of pre-defined categories of queries Benchmarking at unit level Annual average collective dose per reactor Annual total collective dose Annual collective dose per TWh Contribution of Outside Personnel and Outages to Total Collective Dose Evolution of the Number of Reactor Units 3-yr Rolling Average Collective Dose per Reactor Miscellaneous Queries

Using ISOEDAT as a Benchmarking Tool Analyses at country or regional level: Trends in Annual average collective dose per reactor / Annual total collective dose Between countries or regions: by country/region for a given reactor type, or all reactors, including 3-yr rolling average Within a country: Specific unit against another unit or by type of reactor Analyses at utility level: benchmarking of reactors within a utility Specific unit against another unit Specific unit against its sister group / reactor type Analyses at unit level Specific unit against another unit / sister group / reactor type Benchmarking at the job and task level

Example 1 Dose trends per reactor type For most reactor types, the annual average collective dose per operating reactor has consistently decreased over the time period covered in by ISOE 3-year rolling average/reactor for all operating reactors in ISOE by reactor type, 1992-2007 (man·Sv)

Example 2 Dose trends by country for PWRs

Example 3 Dose trends for 1 country for PWRs

Example 4 Dose trends for reactors of 1 sister unit group

Example 5 Dose trends for job Refueling

Comparing Performance & Identifying Good Performance Look into full questionnaires for additional information (ISOE 1, 2 3) Follow-up information: Contact unit using contact information in ISOEDAT RP Forum on ISOE Network website Requests to the technical centres Rapid response to technical requests in operational RP Organise voluntary site visits for exchange of good RP practice, dose reduction information among Participants Examples of feedback/benchmarking can also be found in: Work Management to Optimise Occupational Radiation Protection in the Nuclear Power Industry (ISOE 2008)

ISOE Network website (www. isoe-network ISOE Network website (www.isoe-network.net) Web-based ALARA resource for ISOE members One-stop information website on practical ALARA resources for ISOE Participants: ISOE database: Data analysis Data entry (2009) ISOE products, resources Address book / RP manager forum List of events, etc Facilitates a global approach to ALARA management BUT Registration is required: Currently ~500 registered users Contact your NC and NEA for user account (brian.ahier@oecd.org)

A resource for ISOE Participants!

… More resources and content only after login!

ISOEDAT: Looking forward Data Entry and Data Viewing MADRAS Data Analysis

ISOE Products: Meeting User Needs ISOE Databases Technical Analyses Technical Support ISOE ALARA Symposia Annual and Topical Reports ISOE Network Continuous Improvement: User Needs, User Feedback

Conclusion Value: important combination of global occupational dose data, dose reduction experience, and information exchange among utilities, authorities Success: ISOE has proved successful in helping radiation protection experts to better manage occupational exposures at nuclear power plants Future: ISOE will continue to facilitate the sharing of experience, and the building of linkages between ISOE members worldwide to develop a global approach to ALARA work management

For more information, please visit: www.isoe-network.net www.nea.fr