1. 13 Oct 2005 ICALEPCS 20051 RAMSES: The LHC RAdiation Monitoring System for the Environment and Safety G. Segura CERN on behalf of the RAMSES team

2. 13 Oct 2005ICALEPCS 20052 The LHC RAdiation Monitoring System for the Environment and Safety Overview: LHC radiation monitoring RAMSES project System design: architecture Development Status and results

3. 13 Oct 2005ICALEPCS 20053 LHC radiological risk The operation of accelerators involves interaction of high energy particles with matter Beam losses : nuclear interaction of high energy protons with matter  production of mixed radiation fields (Hadrons, neutrons, muons, photons, etc.). Accelerator in operation : Stray radiations Irradiation risk for personnel (accessible areas) and risk for the environment (through access pits, releases of water and gases). Accelerator stopped : Material activation due to beam losses. Radiation dose rate due to activation Irradiation risk for personnel (maintenance works) and risk for the environment (dispersal of radioactive material). Calibration of detectors (experiments). Radioactive Sources Irradiation risk for personnel and for the environment (dispersal of radioactive sources). OverviewRAMSES projectSystem designDevelopmentStatus and results

4. 13 Oct 2005ICALEPCS 20054 LHC Radiation monitoring The radiological safety of the LHC will be ensured by the on-line acquisition from 350 measurement devices of 15 different types spread over the 8 points (both surface and underground installations). OverviewRAMSES projectSystem designDevelopmentStatus and results

5. 13 Oct 2005ICALEPCS 20055 OverviewRAMSES projectSystem designDevelopmentStatus and results

6. 13 Oct 2005ICALEPCS 20056 Radiation Monitors For Radiation Protection LHC accelerator and experimental areas : Area REM-counter monitor [ARC] Area Gamma dose rate monitor [AGM] Area Mixed field radiation monitor [AMF] Tunnel Gamma dose rate monitor [TGM] Tunnel Mixed field radiation monitor [TMF] X rays monitor [XRM] Induced activity monitor [IAM] Other monitors & equipment : Hand&Foot monitor [HFM] Site Gate monitor [SGM] Tools & material controller [PCM] Alarm radiation display [PAD] For the environment Stray radiation monitoring station: Gamma and muons monitor [EPIC] Neutrons monitor [ERC] Ventilation monitoring station (Emissions): Gas monitor [VGM] Aerosol sampler [VAS] Water monitoring station (Effluents): Release water monitor [RWM] Release water sampler [RWS] Meteorological data (wind speed & direction, atmospheric stability class) : Ultrasound anemometer [USA] Samples from the environment : Environmental aerosol sampler [EAS] Conventional parameters in released water pH, Temperature, Conductivity, Turbidity, Flow rate OverviewRAMSES projectSystem designDevelopmentStatus and results

7. 13 Oct 2005ICALEPCS 20057 RAMSES major functions Monitoring radiation variables ( on-line local and remote display ) Monitoring of ambient dose equivalent rates and ambient dose equivalents in the working environment (underground accessible areas, on the surface and in the environment) Measurement of radioactivity in released gases and fluids (radioactive nuclides) Measurement of induced activity during LHC stop/shutdown Alarm functions (local and remote) Radiation level alarms based on ambient dose equivalent rates and ambient dose equivalents Technical alarms Interlocks Long term permanent and reliable data logging Measured values Events (radiation alarms, interlocks, system fault alarms, technical alarms) System configuration OverviewRAMSES projectSystem designDevelopmentStatus and results

8. 13 Oct 2005ICALEPCS 20058 Design and development constrains Distributed Radiation Monitoring system Flexible and modular design for easy installation and configuration Integrated software infrastructure (control rooms, networks and databases) Operational 24/24 hours a day, 365/365 days per year A safety integrity level (SIL) 2 for radiation alarms and interlocks Industrial solution based on standard industrial equipment (COTS where possible) Compliant with applicable international standards for radiation protection instrumentation Application of the IEC 61508 standards for the overall project management Valid for the replacement of the current radiation monitoring system (ArCon: VME, 68k, OS9 …) OverviewRAMSES projectSystem designDevelopmentStatus and results

9. 13 Oct 2005ICALEPCS 20059 Special requirements LEGAL REQUIREMENTS  State of the art technology  Certification required for radiation protection instrumentation used in decision making !  Delivered by legal European bodies (Already required in most European countries, in France from 1/1/2008 onward…)  Based on the total compliance to applicable international standards (IEC). CERN SPECIFIC REQUIREMENTS  Evaluation required for radiation protection instrumentation used in CERN very particular radiation fields (high energy, mixed and pulsed fields)  Based on a technical reference frame established by legal European bodies derived from experimental studies and Monte Carlo simulations. OverviewRAMSES projectSystem designDevelopmentStatus and results

10. 13 Oct 2005ICALEPCS 200510 OverviewRAMSES projectSystem designDevelopmentStatus and results

11. 13 Oct 2005ICALEPCS 200511 Supervision: Measured values, alarms, status OverviewRAMSES projectSystem designDevelopmentStatus and results

12. 13 Oct 2005ICALEPCS 200512 Archiving, logging, off-line analysis OverviewRAMSES projectSystem designDevelopmentStatus and results

13. 13 Oct 2005ICALEPCS 200513 Configuration management OverviewRAMSES projectSystem designDevelopmentStatus and results

14. 13 Oct 2005ICALEPCS 200514 DA Monitoring of a wide LHC area Radiation protection monitoring station Sensor + DA + Alarm Unit + interlock  Autonomous (2 hours)  Certified by  Certified SIL2  Modular to cover a wide areas BUS UA (RS-485) BUS DA (RS-485) DA UA OverviewRAMSES projectSystem designDevelopmentStatus and results

15. 13 Oct 2005ICALEPCS 200515 Status and results The system installation has started in the LHC surface The equipments to install in the tunnel are being tested in other accelerators A long way still to go before the LHC is fully covered by RAMSES … And after that … the current installations for the other accelerators will be replaced by RAMSES. OverviewRAMSES projectSystem designDevelopmentStatus and results

16. 13 Oct 2005 ICALEPCS 200516 RAMSES: The LHC RAdiation Monitoring System for the Environment and Safety G. Segura CERN on behalf of the RAMSES team