Extracted from EDMS 1868872 HLLHC Residual Dose Rate

Extracted from EDMS. 1868872 HL-LHC - Residual Dose Rate Estimations in the LSS 1 and LSS 5 (from TAXS up to Q 7) C. Adorisio logo area Extracted from the presentation given at 7 th HL_LHC Collaboration Meeting – CIEMAT, 13 -16 November 2017

§ Rules and regulations → Limitation → Optimization/ALARA § Optimization during design → Methodology → Design options § A reminder Extracted from EDMS. 1868872 Outline Residual dose rate outlook → LHC/HL-LHC operation scenario considered → FLUKA geometry → Residual dose rate estimations § Summary logo area C. Adorisio - Study & Readiness for the LS 3 dismantling activities of WP 8, 28 September 2018

EDMS. 1868872 RULES AND REGULATIONS A REMINDER

Extracted from EDMS. 1868872 Safety Code F Design and operation ! Limitation Radiation Workers Category A: 20 m. Sv/y Category B: 6 m. Sv/y Not occupationally exposed workers 1 m. Sv/y Environment 0. 3 m. Sv/y logo area C. Adorisio - Study & Readiness for the LS 3 dismantling activities of WP 8, 28 September 2018

Extracted from EDMS. 1868872 Safety Code F Limitation logo area Total number of working hours per year: 2000 hours (example: Supervised Area 3 µSv/h × 2000 h = 6 m. Sv) Low-occupancy: < 20% of working time C. Adorisio - Study & Readiness for the LS 3 dismantling activities of WP 8, 28 September 2018

Extracted from EDMS. 1868872 Safety Code F Design and operation ! Optimization (ALARA) Optimization by balancing: • • • individual doses number of persons exposed risk costs consequences of potential failures Workers on CERN site 100/10 µSv/yr Outside of CERN (environment) 10 µSv/yr logo area C. Adorisio - Study & Readiness for the LS 3 dismantling activities of WP 8, 28 September 2018

Extracted from EDMS. 1868872 Safety Code F Limitation / Optimization On CERN site Radiation Workers Limits 6/20 m. Sv/yr On CERN site Other workers 1 m. Sv/yr Population outside CERN 300 m. Sv/yr Optimization / ALARA to be demonstrated Optimization Thresholds 100 m. Sv/yr 10 m. Sv/yr Optimized (by definition) logo area C. Adorisio - Study & Readiness for the LS 3 dismantling activities of WP 8, 28 September 2018

ALARA procedure Operational Periods CERN dose objectives 3 m. Sv/yr Long Shutdowns logo area 100 m. Sv Ambient dose equivalent rate Airborne activity 500 m. Sv 50 m. Sv/h 5 CA 100 m. Sv / intervention 2 m. Sv/h 200 CA 100 CS 10 CS Surface contamination 5 m. Sv Level III Collective Dose 1 m. Sv Level II Individual Dose Level I Primary criteria ALARA categories for individual interventions Secondary criteria Extracted from EDMS. 1868872 Optimization during operation Detailed work-anddose planning ALARA committee C. Adorisio - Study & Readiness for the LS 3 dismantling activities of WP 8, 28 September 2018

EDMS. 1868872 RESIDUAL DOSE RATE OUTLOOK

Extracted from EDMS. 1868872 LHC/HL-LHC Operational Scenarios LS 2 Peak / levelled luminosity [cm-2 s-1] Integrated luminosity [fb-1] ≤ 2012 0. 8 E+34 30 2015 6. 30 E+33 4 2016 1. 40 E+34 40 2017 1. 60 E+34 50 2018 1. 60 E+34 50 2021 2. 0 E+34 60 2022 2. 0 E+34 60 past LS 1 Year of (HL-)LHC Operation (2 years) 2023 HL-LHC LS 3 LS 4 LS 5 (3 years) 2. 0 E+34 60 2027 Nominal 5. 0 E+34 Ultimate 7. 5 E+34 Nominal 250 Ultimate 300 2028 5. 0 E+34 7. 5 E+34 250 300 2029 5. 0 E+34 7. 5 E+34 250 300 2031 5. 0 E+34 7. 5 E+34 250 300 2032 5. 0 E+34 7. 5 E+34 250 300 2033 5. 0 E+34 7. 5 E+34 250 300 2035 5. 0 E+34 7. 5 E+34 250 300 2036 5. 0 E+34 7. 5 E+34 250 300 2037 5. 0 E+34 7. 5 E+34 250 300 TOT ~2600 fb-1 TOT ~3050 fb-1 ~TOT 350 fb-1 (1 year) LS 6 logo area 3 blocks of 3 consecutive years of operation + 1 year Long Shutdown each § Nominal: 5. 0 x 1034 – 250 fb-1/y § Ultimate: 7. 5 x 1034 – 300 fb-1/y C. Adorisio - Study & Readiness for the LS 3 dismantling activities of WP 8, 28 September 2018

Extracted from EDMS. 1868872 LHC – Simulation geometry Long Straight Sections in the two interaction regions, IR 1 and IR 5: § Actual machine layout § Real collimators settings Thanks to the FLUKA Team LHC IR 1 LSS LHC IR 5 LSS logo area C. Adorisio - Study & Readiness for the LS 3 dismantling activities of WP 8, 28 September 2018

Extracted from EDMS. 1868872 LHC – Simulation/measurement comparison ü During the year, simulations are performed in order to prepare the Work and Dose Planning (WDP) in advance for each Technical Stop (TS) Radiation measurement, which performed at the beginning of TS, in order to classify the area and prepare WDP for interventions, used to benchmark the simulation logo area C. Adorisio - Study & Readiness for the LS 3 dismantling activities of WP 8, 28 September 2018

Extracted from EDMS. 1868872 LHC - Residual Dose Rate estimation LS 3 – IR 1 Ambient dose equivalent rate – 1 month cooling time ~ 40 50% more Residual dose rate estimations are available for LS 2 and LS 3 periods and can be used for the individual/collective dose evaluation for the consolidation/dismantling works logo area C. Adorisio - Study & Readiness for the LS 3 dismantling activities of WP 8, 28 September 2018