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Radiation ProtectionLS1 - Collaboration with CERN Technical Groups - Lessons learnt

Stephane Bally (CERN), Sandro Di Vincenzo (CERN)

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• Accelerators, Experiments & Sites▫ Radiation Protection Calculation Tools▫ Radiological Area & Materials Classifications and Risk Analysis of Work Places

Experiment Site RP Support Machine Site RP Support (CMS Forward Detectors) IMPACT Tool

• Dosimetry & Calibration▫ Individual/Personal Dosimetry▫ Instrument Calibration (Measuring Devices, Operational Dosimetry)

• Instrumentation & Logistics▫ RAMSES

Personnel (Hand Foot Monitor), Material and Environment Monitors• Radioactive Waste

▫ Analytic Laboratory (Spectrometry Service)▫ Shipping of radioactive material (Import/Export and CERN sites)

TREC Tool▫ Radioactive Sources Service▫ Storage of Radioactive Material

• Industrial Radiographies

Radiation Protection (DGS-RP) Group

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Comments – Positive and Negative• Calculation Tools

▫ Simulations are globally confirmed by in-situ Measurements during LS1▫ Newly 2-step method for open/closed configuration and shielding scenario for next

maintenance periods▫ Communicate better towards Detector/Service teams▫ Invest more time in Work Plan optimization (Risk Analysis) with team supervisor/members

• Area & Material Classifications and Risk Analysis▫ Reduced to local and well known areas (Beam pipe vicinity, Castor and HF small radius

region) during LS1▫ Invest more Survey Map reporting and Improve on-site Perimeter Identification▫ Higher Product and Work Breakdown Structure details on submitted Work Plan/Package is

required to assess risk and apply more efficiently the ALARA principle• Experiment Site RP Support

▫ Quick response time, flexible to adapt to planning change and well know P5 safety awareness

▫ Presence on critical Machining interventions (giving recommendation, and supervision)▫ Improve supply of protective equipment and material on machining task (controls and

training to be included)• Machine Site RP Support

▫ Positive as above, but difficulties on efficiency for forward detector teams (limited resources, external institutes)

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Comments – Positive and Negative• IMPACT Tool

▫ Synchronized with CMS ACT and CMS Access System during LS1▫ In used by CERN Operational Dosimetry Service, Radioactive Waste Services and

CERN Equipment Groups▫ Require learning curve from CMS collaborators

• Individual/Personal Dosimetry▫ Manual Switch On/Off and use on user demand and dose record via control room

shifter▫ Possible as well using IMPACT and Dosimetry Service Readers▫ Double dosimetry (National + CERN) for external firms required (to be planned in

advance)▫ Dosimeter issues to be announced and treated by Dosimetry Service

• Instrument Calibration▫ Measuring Devices no major problem found during LS1▫ Operational Dosimeters (Low Battery exchange time to time)

• RAMSES▫ Personnel, Material and Environment Monitors no major problem found

• Analytic Laboratory▫ Efficient and rapid analysis (depends on work load and inter-site transport)

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Comments – Positive and Negative• Waste Management

▫ Under estimated quantities announced (majority of non-radioactive)▫ On-demand RP material control by DGS/RP technician, adapt to our work load ▫ Non satisfactory material sorting for RP control▫ Provide container for large objects as well as easy access to plastic bags (promote

local waste collection at working places)• Shipping

▫ Efficient response time (require process time (multi-services) according to safety rules)

▫ TREC tools deployed during LS1 (SIR training course shall be requested for buffer zone access)

• Radioactive Source Service▫ Treated directly between Requester and Source Service▫ RSO systematically informed by Source Inventory Tool (should be coordinate with

other activities at TC meeting)• Storage of radioactive material

▫ Temporary storage (short term) allowed at P5 during maintenance activities▫ Shall be packed on palette and send to GS/RP facilities (Prevessin site) for longer

storage period

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Comments – Positive and Negative• Industrial Radiographies

▫ Well informed about P5 infrastructure and activities coordination unit▫ Safety Officers and Planning Officer being now systematically informed

• Visit Services▫ Large success during LS1▫ Co-activity conflict and incident hardly predictable, depend on field

supervision and task progress (create off-visit pathway and/or time slots)

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Other observations relevant for future shutdowns• Space Management

▫ Shall be addressed at early stage from Project Proposal▫ Plans for radioactive storage, logistics and waste management shall be

drafted

• Product Management▫ Shall be continuously documented from design to disposal, through

manufacturing, installation and maintenance phases

• Resource Management▫ Work activity resources (human, material and time) shall be timely scheduled

including the Quality Planning, Work Execution and Quality Control

• Information Management▫ Collect information on work procedure and product specification around a

common data repository structure▫ Avoid duplication, promote references, apply change management process

and define document categories

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Conclusions• Safety

▫ Continue Best Practices (Training, Safety Officer)▫ Stay Informed (Safety start with us)▫ Share Experience (Collaborate and Document)

• Quality▫ Plan, Do, Check and Act▫ Think Global, Act Locally▫ Continuously Improve (Knowledge Management)

• Schedule▫ Objectives vs Resources▫ Define and Adjust