1. Cristiana Colloca GS/SEM – ATOP – MARCH 2009 Infrastructure Consolidation of Accelerators Injectors (civil engineering) Cristiana Colloca GS/SEM – ATOP 5th of March 2009

2. CONCERNED Surface - Roofs, façades, floors, windows, sanitary etc. all buildings (machine and tertiary) - Roads, parking, green areas, storage surfaces, etc. - Cleansing Underground tunnels NOT CONCERNED For all the buildings (machine and tertiary), surface and underground: - HVAC - Heating plants and heating network - Electrical equipment - Lifting and transport equipment - Automatic doors - Kitchen equipment -... Cristiana Colloca GS/SEM – ATOP 5th of March 2009 THESE WORKS ARE NOT CONVERED BY THE NORMAL MAINTENACE CARRIED OUT EACH YEAR Contents

3. DATA AND DETAILS IN SITE CONSOLIDATION ON CIVIL ENGINEERING AND TECHNICAL INFRASTRUCTURE AT CERN 2008 UPDATE C. Colloca, M. Nonis, P. Pepinster du 18.08.2008 SITE CONSOLIDATION ON CIVIL ENGINEERING AND TECHNICAL INFRASTRUCTURE AT CERN 2009 UPDATE C. Colloca, P. Pepinster du 24.02.2009 References Cristiana Colloca GS/SEM – ATOP 5th of March 2009

4. Categories of roofs repair: 1 - Sensitive equipment: roof leaks are affecting the safety of equipment and/or the running of an accelerator; critical situation; immediate intervention is required 2 - High frequency leaks: the roof is no more waterproof and leaks are detected very often; conditions will become critical if an intervention is not taken within a short time Roofs consolidation : criteria Cristiana Colloca GS/SEM – ATOP 5th of March 2009

5. Roofs consolidation - SENSITIVE ~51% Cristiana Colloca GS/SEM – ATOP 5th of March 2009

6. Roofs consolidation - FREQUENT ~57% Cristiana Colloca GS/SEM – ATOP 5th of March 2009

7. Facades consolidation Carbonatation on concrete and corroded steel, icing-deicing cycles... (spalling phenomena etc.) Cristiana Colloca GS/SEM – ATOP 5th of March 2009

8. Facades consolidation ~22% Cristiana Colloca GS/SEM – ATOP 5th of March 2009

9. Windows, claddings, spalling concrete, painting etc. Other Miscellaneous Consolidation Measures - Buildings Cristiana Colloca GS/SEM – ATOP 5th of March 2009

10. BuildingLocation Year of Construction FunctionProblem-Description Surface to repair (m2) Cost Estimate (kCHF) 192Meyrin1971CONTDeteriorated floor and ceiling in main floor55095 253Meyrin1958DISTCorroded external support beams of building16540 291Meyrin1969ACCEDeteriorated wooden floor10016 867Prevessin1973ASSEMetal cladding with corroded areas14030 112Meyrin1971BULA Metal cladding with scaling paint, some points of corrosion along facade 57186 185Meyrin1975EXPE Inside panels (walls and ceiling) containing asbestos are unsecured 450 181Meyrin1969STOC Metal cladding with unfastened panels and corroded areas 50070 864, 865, 866Prevessin1973BULA Completion of replacement window frames campaign 60 501Meyrin BULATerrace repair 250 TOTAL1097 TOTAL FOR INJECTORS90 ~8% Other Miscellaneous Consolidation Measures - Buildings Cristiana Colloca GS/SEM – ATOP 5th of March 2009

11. Cleansing - CERN does not comply with applicable (no mix of clear and waste water and fosses septiques (ex. SPS)) - very bad condition of the drainage equipment due to age and progressive invasion of roots penetrating the pipes Cristiana Colloca GS/SEM – ATOP 5th of March 2009

12. The estimated cost for the asbestos removal from civil engineering structures is still kept to 5 MCHF for all CERN site, not including the ancillary work such as the relocation in other buildings of the working personnel for the duration of the work. Main works are: - Bldg 150 - PS technical galleries Asbestos removal Cristiana Colloca GS/SEM – ATOP 5th of March 2009

13. Consolidation Requests - Surface Intervention Typology Overall cost (kCHF) Total cost for 'Injectors’ (kCHF) Proposed Annual Spend for ‘Injectors’ (kCHF) Civil engineering Roof (sensitive equipment)27711430150 Roof (high frequency)54903110150 Facades4551984500 Windows409060 Toilets, sanitary installations450200 Other interventions109730 Roads& Parking areas1300500 Cleansing300120 Asbestos removal50004000800 TOTAL25049104342510 Cristiana Colloca GS/SEM – ATOP 5th of March 2009

14. Minimal Consolidation Program 2009 for Injectors - Surface Intervention TypologyTotal cost (kCHF) Roofs (EHN1, BA5)380 Facades (863, 867)500 Windows (864, 865, 866)60 Toilets, sanitary installations 50 Roads & Parking areas100 Cleansing50 TOTAL1940 Cristiana Colloca GS/SEM – ATOP 5th of March 2009

15. Previous canalisations of leaks were done using flexible PVC membranes. These need to be changed for the stainless steel channels now used, in order to comply with current fire norms. Underground Consolidation * - PS, SPS, Booster Cristiana Colloca GS/SEM – ATOP 5th of March 2009 *Contribution of Richard Francis Morton GS/SEM

16. A campaign of repainting of the tunnel vault is required to reduce the amount of dust and contamination caused by water ingress and decay of the original paint. This work may also require some superficial repair to the concrete. Underground Consolidation - PS, SPS, Booster Cristiana Colloca GS/SEM – ATOP 5th of March 2009

17. Significant areas of tunnel floor have been contaminated by hydrocarbons and will require resurfacing. Underground Consolidation - SPS Additional work is required to ensure construction joints are repaired and levelled to allow transport to pass. Cristiana Colloca GS/SEM – ATOP 5th of March 2009

18. Construction of an oil separator at one or more locations underground to allow oil to be removed from the drainage system before it is pumped to surface. Underground Consolidation - SPS A campaign of decalcification and cleaning of the central drain is long over due. This work is currently hampered by the lack of water supply at regular intervals along the tunnel. Cristiana Colloca GS/SEM – ATOP 5th of March 2009

19. Many of the toilets in the underground SPS complex are in a poor state of repair and require renovation. A campaign of repair/replacement of the concrete covers to the technical gallery in the PS is required to make safe the floor. Other Miscellaneous Consolidation Measures - Underground Cristiana Colloca GS/SEM – ATOP 5th of March 2009

20. Intervention Typology *Total cost (kCHF) Replacement PVC Gutters120 Renovation of Tunnel Vault150 Renovation of Tunnel Floor200 Oil InterceptorT.B.A. Drain Decalcification and Cleaning T.B.A. PS Concrete cover renewalT.B.A. Renovation of Underground Toilets 120 TOTAL590 *The amount of work possible is entirely a function of access during shutdown. This may mean spreading the work over several shutdowns. Consolidation Requests - Underground Cristiana Colloca GS/SEM – ATOP 5th of March 2009

21.  CERN infrastructure (surface and underground) is rapidly deteriorating, trends are negative (i.e. roofs) => overall consolidation planning on large scale is a major issue to be treated because of safety, legal, operational and economical reasons  Consolidation costs are constantly rising due to the lack of intervention (ex. Anti-carbonatation treatments)  2009 consolidation program is based on most urgent interventions known today, but depending on: Budget (available today = 800 kCHF for all CERN (!)) Boundary conditions during the approval of the program (accelerator operation, weather conditions, etc.) Number of FTE assigned to perform the program  Increasing expectation for consolidation activities from CERN community, visible actions need to be done to avoid widespread feeling of frustration Conclusions Cristiana Colloca GS/SEM – ATOP 5th of March 2009