NA CONSOLIDATION & SAFETY SYSTEMS Y. Kadi, F. Gautheron, E. Solodko, M. Wilhelmsson 85th EA Technical Meeting, 4 July 2017

NA-CONS Study: Mandate Deliver a comprehensive proposal for the North Experimental Area consolidation, including: All Beam related items Infrastructure & General Services Civil Engineering The Study shall propose implementation scenarios with all possible staging options, considering separately the periods: prior and during LS2 (highlighting urgent actions) between LS2 and LS3 as well as during LS3 Y. Kadi, 04-07-2017 North Area Consolidation & Safety Systems

NA-CONS Study: Proposed Roadmap Identify most urgent items 2017/2018 and secure budget Define WBS/PBS and prepare related project documents Discuss with concerned groups & participate to the safety diagnostic (carried out by EN-DSO) Identify Consolidation/Upgrade activities together with resources and budget needs Y. Kadi, 04-07-2017 North Area Consolidation & Safety Systems

Flammable Gas Detection - SAFETY BE-ICS in NA-CONS Safety = priority 1 (hopefully) Several meetings with EN-DSO, HSE, EP New distribution of flammable gas detectors in EHN1 (D. Jaillet 83rd EATM) Still 2 gas barracks (907, 909) but with less detectors (more inert gases) 2 mixing zones on Jura side + 2 mixing zones on Salève side All PPE zones reviewed along H2, H4, H6 & H8 beam lines. PPE zones of Jura side already treated, commissioned & validated (HSE) Finalizing requirements for the Salève side. Hope for commissioning during next YETS EHN2, ECN3: no particular requirement. Usual maintenance ECN3: hydrogen detection in the cavern (mixing area) and barrack (bldg. 918) Y. Kadi, 04-07-2017 North Area Consolidation & Safety Systems

Gas Distribution - SAFETY EN-EA in NA-CONS Les solutions suivantes vont être mise en œuvre (planifiées, budgétisées) : Doubler les soupapes sur les réseaux de gaz. Mise en conformité ATEX des baraques. Les solutions suivantes sont proposées : Mise en conformité ATEX des points de distributions dans les halls. Monitoring sur les consommations (débitmètre entrée – sortie). Y. Kadi, 04-07-2017 North Area Consolidation & Safety Systems

Oxygen Deficiency Hazard (ODH) & CO2 - SAFETY BE-ICS in NA-CONS ODH risk in underground galleries - EHN1 Gas network for nitrogen, argon, CO2, helium No air circulation in the galleries Calculations for massive leaks: O2 from 21% to 18% in 72 sec. Time to escape, no needs for safety mask, but requires: Access control (already implemented) + ODH portable + CO2 detection Needs for ventilation. To be discussed with EN-CV ODH risk in EHN2 galleries Obsolete system but no plan for renovation before 2020 (LS2) ODH risk in ECN3 experimental cavern Fully renovated in 2015. Detection in the krypton area. Possible upgrade (LS2) Y. Kadi, 04-07-2017 North Area Consolidation & Safety Systems

Fire Detection - SAFETY BE-ICS in NA-CONS Already in the framework of the SPS fire safety project Risk to be assessed by HSE, status report required Detection technology to be deployed Fire doors? Segmentation along beam lines? ….not necessary same needs than SPS Issues already known: Absence of smoke evacuation in the NA beam tunnels Obsolete sprinklers Surface buildings: Evacuation alarm to be renovated 30 km of PVC pipe (air sampling network) must be removed When? Post LS2. LS2 already heavily loaded Y. Kadi, 04-07-2017 North Area Consolidation & Safety Systems

Cryogenics Installations - TE-CRG Meeting may 25th with D. Delikalis & M. Capeans (TE-PPR) Items already treated (maintenance or consolidation): All compressors and cold boxes are OK UNICOS migration already performed for all the cryo controls NA62 consolidation (LN2 transfer line for liquid krypton, valves) done To be consolidated or wishes to be: 6 centrifugal pumps for experimental SC magnets (6x150 kCHF) Urgent: 3.3kV cells for control and compressors (bldg. 895) -> EN-EL Stop renting and purchase large LN2 storages (2x20000 l + 1x50000 l) -> 440 kCHF (from a 2014 cost estimate): long term savings… TE-CRG will prepare work units description by mid-July Y. Kadi, 04-07-2017 North Area Consolidation & Safety Systems

North Area Consolidation & Safety Systems Magnets - TE-MSC Current situation: 426 beam line magnets in total Spares magnets are available for almost all the families Activities to be done for 2017: zero-field probe replacement, exchange of manifolds, ELETTA refurbishing, renovation of electrical interconnections Possible safety audit: Inspection not needed: TE-MSC aware of all the issues related to safety and reliability Known issues: electrical safety conformity, water leaks, shimming of the coils, replacement of polyurethane pads for the magnets supports Energy Balance program upgrade: The program should be validated by physicists Only ~116 solid yoke magnets can be replaced by laminated ones Some of these magnets are of the same families as for the EA Future actions: TE-MSC to provide to EN-DSO past history of leaks/incidents TE-MSC to prepare work unit description EN-DSO to update risk assessment and issue recommendations Y. Kadi, 04-07-2017 North Area Consolidation & Safety Systems

Civil Engineering - SMB-SE Issues which can potentially be included in the consolidation program : Infiltration of ground water in the tunnels Motorized doors renovation False floors Drainage networks Roofs In case of upgrade, all the works will be contemplated in the context of the equipment groups/users future requirements; Items that should be included in possible safety diagnostic: Systems for smoke evacuation (sky domes more appropriate than extraction) Presence of asbestos Future actions: EN-EA to contact TSOs and users of all NA buildings SMB-SE to fill in the work unit description documents Y. Kadi, 04-07-2017 North Area Consolidation & Safety Systems

Cooling & Ventilation - EN-CV EN-CV group is well advanced in terms of identification of consolidation activities. Three work unit description documents were received a month ago. The activities for 2017/2018: TDC2/TCC2 ventilation: 5/8 power cubicles already done. Renew remaining 3 power cubicles during YETS 2017/2018 Chilled water renovation all along the years except during LS2 BA80 and BA82: soft start of the pumps Activities planned for LS2: Chilled water pipe renovation Renovation of the cooling towers power control system (building 893) Replace backing of the cooling towers Activities post-LS2: Renovation of the ventilation system of all surface buildings (BAs) Work on the compressed air system during the YETS and EYETS Renovation of the Ventilation system of the gas building Continue the soft start of the pumps Future actions: EN-CV to provide remaining work unit description documents Y. Kadi, 04-07-2017 North Area Consolidation & Safety Systems

Handling & Transport - EN-HE The activities for 2017/2018: Currently no activities are to be done for this year Replacement of lifts alarm (not with NA-CONS budget) Activities to be done during LS2: B. 889 (BA 80) crane revamping + remote operations B. 888 (EHN2) cranes PR-0539 & PR-0545 revamping or electrical renovation B. 886 (TCC2) cranes PR-0537 & PR-0544 revamping or replacement Activities post-LS2: B. 889 (BA 80) lift B. 912 (PP851) lift BAA85 lift Future actions: EN-HE to provide work unit description documents Y. Kadi, 04-07-2017 North Area Consolidation & Safety Systems

Secondary Beam Lines - EN-EA Urgent Safety requirements Buffer zone and RP monitor in BA80 SUSI for EHN2 Closing of galleries in EHN1 and ODH Key cabinet in EHN1 Dry vacuum pumps for TCC2 Gas safety (safety valves, check valves, purging systems) Collimator renovation 9 collimators in total this year (program will continue) Beam line items renovations Fellows and TTE for NA-CONS Study PJAS for Cesar Bend 7 Gas rack for XCET Note that gas renovation measures are reported separately Y. Kadi, 04-07-2017 North Area Consolidation & Safety Systems

North Area Consolidation & Safety Systems Summary Discussion with concerned groups still ongoing: HSE-RP, EN-STI, EN-EL, TE-EPC, TE-MPE, TE-VSC, BE- BI, BE-CO, IT-CS Budget 2017 under control: 82% committed Target for 2017 to 2027: Identify Consolidation/Upgrade activities together with resources and budget needs Y. Kadi, 04-07-2017 North Area Consolidation & Safety Systems