Formation RSSO : Mise en oeuvre du principe ALARA Nadine CONAN – Alexandre DORSIVAL 25 Janvier 2013 This template can be used as a starter file for presenting training materials in a group setting. Sections Right-click on a slide to add sections. Sections can help to organize your slides or facilitate collaboration between multiple authors. Notes Use the Notes section for delivery notes or to provide additional details for the audience. View these notes in Presentation View during your presentation. Keep in mind the font size (important for accessibility, visibility, videotaping, and online production) Coordinated colors Pay particular attention to the graphs, charts, and text boxes. Consider that attendees will print in black and white or grayscale. Run a test print to make sure your colors work when printed in pure black and white and grayscale. Graphics, tables, and graphs Keep it simple: If possible, use consistent, non-distracting styles and colors. Label all graphs and tables.

Formation RSSO - ALARA - 25/01/13 Sommaire Présentation de la démarche ALARA Dosimétrie prévisionnelle (WDP) Dossier d’Intervention en Milieu Radioactif (DIMR) Finalité Contacts DGS-RP Etude de cas : graissage des TAX Give a brief overview of the presentation. Describe the major focus of the presentation and why it is important. Introduce each of the major topics. To provide a road map for the audience, you can repeat this Overview slide throughout the presentation, highlighting the particular topic you will discuss next. Formation RSSO - ALARA - 25/01/13

Présentation de la démarche ALARA Dosimétrie prévisionnelle Work and Dose Planning (WDP = fichier excel) Dossier d’intervention en Milieu radioactif (DIMR -> onglet dans IMPACT) Synthèse de la dosimétrie prévisionnelle (WDP) Classification de l’intervention Recommandations, revue de l’optimisation Approbation Retour d’expérience et clôture Formation RSSO - ALARA - 25/01/13

Dosimétrie prévisionnelle (WDP) Outil: fichier excel hébergé sur un site sharepoint (https://espace.cern.ch/rpps/wdp/default.aspx) Fichier partagé, éditable par plusieurs personnes/groupes Estimation des ressources impliquées dans l’intervention (homme*heure) Description d’une tâche Personnes exposées (nombre et identification) Durée d’exposition Positions de travail Association au débit de dose (mSv/heure) Dose collective, dose individuelle max. (Homme*mSv, mSv) Préparation de l’intervention Formation RSSO - ALARA - 25/01/13

Dose collective (exemple) < Description >   Working time Effective avg. dose rate Collective dose [man.hours] [µSv/h] [man.µSv] Totals: 29.4 35 1020 Prior intervention To be completed and checked by work coordinator(s) and experts Prior intervention To be checked and completed by RP 1 2 3 4 5 6 7 8 9 10 11 No. Work description (Task) Responsible person Dep/Grp (executing) WorkTeam Location (check table 'DoseRates') Persons [No.] Time [min] Dose rate [µSv/h] Estimated dose [µSv] Estimated total dose [µSv] Preparation 54 1.01 Survey RP V.Donate DGS/RP Team 1 B 20 25 1.02 Preparation of fixture and cables D Bodart TE/MSC Team 2 C 30 1.03 Transport of the magnets from b151 to final destination 17 1.04 VAT, MALT, disconnection of the power cables A 40 27 Installation 683 2.01 Installation of the magnet on the table 150 200 2.02 Opening of the magnets D 100 15 50 2.03 bolting of the magnet 125 167 2.04 pre- alignment 2.05 electrical connection + covers 67 Reinstallation 3.01 Remove MAT 33 3.02 Install covers 3.03 Electrical checks (polarity, power, thermal) 75 Verification 117 4.01 Alignment survey T Dobers BE/ABP Team 3 60 80 4.02 Thermal inspection 18 24 4.03 Audio / visual inspection 13 Formation RSSO - ALARA - 25/01/13

Dose individuelle (exemple) Dep/Grp Company WorkTeam DOSE Last 31 days [µSv] DOSE Last 12 months [µSv] Dosimetry status DOSIMETRY extremities [TLD No.] Estimated dose [µSv] Total Of DOSE [µSv]   n/a DGS/RP Team 1 573 8 3 TE/MSC Team 2 992 186 48 872 53 BE/ABP Team 3 818 40 45 1126 90 343 822 102 550 34 470 24 Formation RSSO - ALARA - 25/01/13

Formation RSSO - ALARA - 25/01/13 DIMR (outil: IMPACT) Synthèse du WDP (dose collective, dose individuelle max.) Conditions radiologiques (débit de dose max., contamination surfacique ou atmosphérique) Formation RSSO - ALARA - 25/01/13

Classification de l’intervention * Critères groupe 1 (dose) Individual dose equi. Level I 100 mSv Level II 1 mSv Level III Collective dose equi. 500 mSv 5 mSv Critères groupe 2 (risques) Ambient dose equivalent rate Level I 50 mSv/h Level II 2 mSv/h Level III Airborne activity in CA 5 CA 200 CA Surface contamination in CS 10 CS 100 CS * Modification des critères en cours d’approbation (ARWG report) Formation RSSO - ALARA - 25/01/13

ZONAGE RADIOPROTECTION Formation RSSO - ALARA - 25/01/13

Recommandations, approbation Exemple alarme dosi op Formation RSSO - ALARA - 25/01/13

Formation RSSO - ALARA - 25/01/13 DIMR workflow * Level DIMR-1 DIMR-2 DIMR-3 Owner Applicant (i.e. equipment owner, work coordinator, contract or activity responsible) Preparation (iterative) WDP template Optional Applicant or RSSO Mandatory Applicant or RSSO Mandatory Applicant or RSSO or RSO provides dose rates RP DIMR level RSSO and RP RP and (RSO or RSSO) RP and RSO Documented work optimization process Optional RSSO Mandatory RP and RSSO Mandatory Applicant and RSSO and RP and RSO Inform PCR (if applicable) on request Yes Approval RSSO Dept. GL and RP and RSO Complex manager (ALARA-c)   Veto rights - Follow up Retour d’expérience Optional RSSO Mandatory RSO and RP and supervisor of intervention Closure of WDP Optional : RSSO Mandatory: RP Closure of intervention (DIMR) RSSO or supervisor of intervention RSO ALARA-committee Controls Optional RSSO or RP Mandatory RP * DIMR workflow en cours d’approbation (ARWG report) Formation RSSO - ALARA - 25/01/13

Retour d’expérience, clôture Formation RSSO - ALARA - 25/01/13

Formation RSSO - ALARA - 25/01/13 FINALITÉ La documentation des interventions (WDP, DIMR) contribue à construire et partager un patrimoine de connaissances et de savoir-faire Retour d’expérience à intégrer pour les interventions similaires et dans les nouveaux projets Nécessité d’une étroite collaboration entre DGS/RP et les unités opérationnelles Une mission d’interlocuteur priviligié pour les RSSOs Un enjeu important pour le LS1 ! Formation RSSO - ALARA - 25/01/13

Formation RSSO - ALARA - 25/01/13 DGS-RP contacts Formation RSSO - ALARA - 25/01/13

Formation RSSO - ALARA - 25/01/13 ETUDE DE CAS Graissage des TAX – Zone TCC2 BA80 Vue d’ensemble du TCC2 Formation RSSO - ALARA - 25/01/13

Localisation des TAX T2-T4 Formation RSSO - ALARA - 25/01/13

Formation RSSO - ALARA - 25/01/13 Localisation du TAX T6 Formation RSSO - ALARA - 25/01/13

Résultats cartographie RP Débits de dose ambiants µSv/h (à 40cm des équipements) Formation RSSO - ALARA - 25/01/13