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New ALARA recommendations proposed by the A LARA R EVIEW W ORKING G ROUP (ARWG)

New ALARA recommendations proposed by the A LARA R EVIEW W ORKING G ROUP (ARWG). Heinz Vincke on behalf of ARWG LS1 committee meeting 24.05.2013. Classification of interventions in radiation areas until now - 5 criteria, 3 levels. ALARA procedures – 3 levels:

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New ALARA recommendations proposed by the A LARA R EVIEW W ORKING G ROUP (ARWG)

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  1. New ALARA recommendationsproposed by the ALARA REVIEW WORKING GROUP (ARWG) Heinz Vincke on behalf of ARWG LS1 committee meeting 24.05.2013

  2. Classification of interventions in radiation areas until now - 5 criteria, 3 levels ALARA procedures – 3 levels: • If the rad. risk is low <> very light procedure • If it is medium <> an optimization effort is required • If it is high <> an optimization effort is required, the procedure will be submitted to and presented at the ALARA committee

  3. Retour d’experience until 2011/2012 Many positive examples prove that job optimization (reduction in dose to personnel) was, is and has to remain the main goal. But • All DIMR Level III are prepared, not all DIMR Level II • ALARA criteria are questioned • No coherent approach in A&T departments and LHC experiments for Level I interventions • RP act(ed) as “owner” of DIMRs • Follow-upof recommendations not systematically done • No clear guidelines forwaivingALARA committees meetings. • ... DIMR = Dossier d’Intervention en Milieu Radioactif

  4. ALARAReviewWorking Group MEMBERS: Chair: H. Vincke (DGS/RP) Sc. Sec.:T. Wijnands (EN/HDO) • RP (including RP group leader) • RSOs from all departments and from the LHC experiments (GLIMOS from ATLAS repl. ATLAS RSO) • ‘experts/user’ • R. Catherall • I. Efthymiopoulos • P. Bonnal

  5. ARWG was expected to deliver: • Proposal forALARA criteria • Proposal on how to initiate, to follow up and to archive the DIMRs (for all three levels) • Proposal of guidelines for presentations to the ALARA committee • Proposal of procedure waiving an ALARA committee meeting

  6. ALARA criteria ALARA Criteria

  7. ALARA criteria and levels at CERN: new old hard limits 5 mSv risk assessment required -> RSO and RP decide on ALARA Level ALARA Criteria

  8. DIMR & WDPDossier d’Intervention en Milieu Radioactif & Work and Dose Planning DIMR & WDP

  9. Started in 2009: DIMR based on a SharePoint site – 2006-2008: DIMR (Dossier d’Intervention en Milieu Radioactif) • …. to edit and store work and dose planning documents • Create a new work and dose planning folder • Create a new work and dose planning document • Create a new radiological work permit DIMR & WDP

  10. IMPACT - DIMR & WDP IMPACT (Intervention Management Planning & Activity Coordination Tool), is a general tool to manage work and activities + related aspects, i.e. planning, infrastructure, co-activities, permits, requests and documentation. ARWG also strongly supported the idea to use IMPACT for DIMRs and they have been implemented into IMPACT already DIMR & WDP

  11. Formal Approach All work needs to be announced to superintendent (Work Planning coordinators for experiments)  RP, RSOs/GLIMOS and the superintendents (Work Planning coordinators for experiments) check the list of works and make a ‘first’ DIMR level classification. DIMR Level 1: • Work planning by maintenance/repair team • IMPACT no documented WDP needed • Approval by RSSO/RPE DIMR Level 2 and 3: • Work and dose planning by maintenance/repair team, RP and RSO/RSSO • Approval by department GL, RSO, RP for DIMR Level II • If DIMR Level 3 -> ALARA Committee • IMPACT with DIMR LHC experiments apply DIMR/WDP also for Level 1 – integrated into the access request DIMR & WDP

  12. DIMR & WDP RP=DGS/RP

  13. Guidelines for presentations in the ALARA committee meeting ALARA Committee

  14. Guidelines for presentations in the ALARA committee • Short description of intervention and the type (planned, unanticipated, urgent unanticipated) • Justificationof intervention & consequences in case the intervention does not take place • Putthe intervention into context using events in the past (if applicable). • Similar activities on the same installation, REX, etc. • Last maintenance performed • Envisaged revisions or replacements in the future • Presentation of the DIMR – should contain at least : • Detailed description of major steps of the intervention and the time estimates • Results of mock-up tests and dry-runs (if applicable) justifying the estimated times and working methods • Measures that have been retained to optimize the intervention (remote handling, local shielding etc …..) • Summary of the optimization measures that were considered but not retained • Present the ALARA parameters for the optimized and for the non-optimized version of the DIMR • Assessment of risks of accidents and incidents and measures that have been taken to minimize these risks • Summary of the intervention ALARA Committee

  15. Waiving of an ALARA committee meeting ALARA Committee

  16. Waiving of the ALARA committee meeting Circumstances • Repetitive intervention • A procedure has been worked out under which circumstances a waiving of the ALARA committee meeting could be possible – valid for interventions approved already once in the ALARA committee. • Urgent maintenance/repair Suggestion: generic DIMRs should be worked out and approved a priori in an ALARA committee meeting. ALARA Committee

  17. …in case of waiving • Waiving of the ALARA committee meeting has to be recorded • This action shall also be noted in the DIMR. • The outcome will be presented in the next Radiation Safety Officer Committee (RSOC) meeting • ... and summarized in the next ALARA committee meeting.

  18. The ARWG discussed and looked into proposals for: • ALARA criteria: • Criteria and Levels • Operational margins • Emergency intervention • DIMRs &WDP: • Ownership • Procedure to create, check, validate and close • Work optimization process • Retour d’expérience • Controls • Functionality, routing, CERN integration • Contractors, PCR • Approval rounds • Implementation issues • ALARA committee: • Guideline for presentations • Frequency • Quorum • Roles • Waiving of the ALARA committee meeting

  19. Final report(s) from ARWG … …were approved by S. Myers and R. Trant on 20 April 2013! EDMS doc # 1244380

  20. Next steps Existing ALARA documents (EDMS 825353, 810178 and 810176) will be combined into a single document and updated with the recommendations from the ARWG + The new rules have become effective on 20. April 2013

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