Updates on CENF SB WG CENF Project Meeting 19 th September 2013

1. Updates on CENF SB WGCENF Project Meeting 19th September 2013 M. Calviani for the CENF SB WG team

2. Civil Engineering updates L. Faisandel, N. Baddams, S. Girod M. Calviani - CENF PTM 19th September 2013

3. Civil Engineering updates Space added to fix backwards shielding leakage w/ Fe blocks L. Faisandel, N. Baddams, S. Girod M. Calviani - CENF PTM 19th September 2013

4. Civil Engineering design updates Space reserved for Fe collar at the beginning of DP (thermal analysis pending) L. Faisandel, N. Baddams, S. Girod M. Calviani - CENF PTM 19th September 2013

5. Secondary Beam integration L. Faisandel, N. Baddams, S. Girod M. Calviani - CENF PTM 19th September 2013

6. Secondary Beam integration S. Girod M. Calviani - CENF PTM 19th September 2013

7. Secondary Beam integration Inconsistencies between integration and CE will be removed at the next iteration S. Girod M. Calviani - CENF PTM 19th September 2013

8. Transport and manipulation input • Updated layout and modifications of previous design • Bigger overall height due to a larger span • Festoon parallel to the railways containing all cables • Main hoist • Capacity: 40 ton • Lifting height: 24 m • Lifting speed: 5 m/min • FEM classification: M4/A4 • Reeving system: 4/2 (true vertical lift) • Auxiliary hoist: • Capacity: 5 ton • Lifting height: 26,1 m • Lifting speeds: 1.6 m/min • FEM classification: M4/A4 • Reeving system: 4/2 (true vertical lift) R. Rinaldesi, K. Kershaw M. Calviani - CENF PTM 19th September 2013

9. Transport and manipulation input 5 ton 40 ton R. Rinaldesi, K. Kershaw M. Calviani - CENF PTM 19th September 2013

10. Transport and manipulation input • Fault analysis (link) • Mechanical faults (hoist + cross and long travel) • Most risky is gearbox assembly – additional mitigation with heavy duty gearbox • Electrical faults • Cubicles (power and control) outside radiation areas M. Calviani - CENF PTM 19th September 2013

11. Initial discussion on access system configuration Material Door: Controlled F. Valentini M. Calviani - CENF PTM 19th September 2013

12. F. Valentini M. Calviani - CENF PTM 19th September 2013

13. TO BE MODIFIED WITH NEW LAYOUT OF HS BUILDING F. Valentini M. Calviani - CENF PTM 19th September 2013

14. Next items for discussions: • Confirmation of the role of the CV systems • Confirmation of radiological classification of the different areas (RP) • List of all CENF areas accessible by personnel • Confirmation of the CENF sectorization F. Valentini M. Calviani - CENF PTM 19th September 2013

15. Update on He-vessel calculations • Preliminary evaluation on the He-vessel structural issues • Assuming vacuum needed before refilling with He • Case studied: • 100 mm thick – 250 ton • 50 mm thick – 125 ton • 50 mm thick – lateral stiffeners • 50 mm clamped • Max total deformation 36 mm • Max reaction force 1.2 MN • Stress ~175 MPa, good safety factors with S235/S355 SSS • Other solutions under investigation (i.e. screw pushing the blocks)! A. Perillo-Marcone, M. Hora M. Calviani - CENF PTM 19th September 2013

16. T2K He-vessel clamping M. Calviani - CENF PTM 19th September 2013

17. Updates on EL infrastructure • Preliminary layout of the EL infrastructure J. Devine M. Calviani - CENF PTM 19th September 2013

18. J. Devine M. Calviani - CENF PTM 19th September 2013

19. 18 kV stable loop 18 kV pulsed loop 3.3 kV secure loop Redundant 18kV/400V transformers Safety 400V loads Normal loads 400 V UPS Horn/reflector UPS network J. Devine, M. Dujardin M. Calviani - CENF PTM 19th September 2013

20. Discussion on cooling and ventilation matters • Design air-tightness parameter (until CE parameters will be available) 0.6 vol/h @50Pa • Morgue will be at a lower pressure with respect to target hall • In the next days a proposition on the pressure cascade will be discussed • Flow estimation ! M. Battistin M. Calviani - CENF PTM 19th September 2013

21. PRELIMINARY • Avoid recirculation in the underground areas (dry air) • Recirculation in the target hall • Dedicated extraction for the service pit will be foreseen • Foresee a delay line in the underground extraction • HTO condensation at the extraction or at stack? Delay line/buffer tank M. Battistin M. Calviani - CENF PTM 19th September 2013

22. PRELIMINARY No recirculation M. Battistin M. Calviani - CENF PTM 19th September 2013

23. Discussion on cooling and ventilation matters • Flow estimation will be clarified with an improved thermal load distribution • ongoing PRELIMINARY b. 893 M. Battistin M. Calviani - CENF PTM 19th September 2013

24. Radioprotection updates C. Strabel, H. Vincke M. Calviani - CENF PTM 19th September 2013

25. Cumulated dose in reflector area • ~10 Gy/y at motors location (~1010 HEH/cm2/y) • ~Gy/y in the service pit • Expected <O(10) mGy/y in target hall C. Strabel, H. Vincke M. Calviani - CENF PTM 19th September 2013

26. Cumulated dose in 1st pit area • ~1-50 kGy/y at 1stmuon pit C. Strabel, H. Vincke M. Calviani - CENF PTM 19th September 2013

27. Radioprotection and radionuclide emission • According to present calculations, 44 TBq/y would be released if extraction would be immediate; 30 TBq/y are due to 15O, with a t1/2 of 2 min; • If air could be released with a delay of 5 to 10 minutes, the effective dose to public will be minimal • Next: • When ventilation flow will be know, the effect of continuous release will be evaluated by HSE P. Vojtyla M. Calviani - CENF PTM 19th September 2013

28. Next steps • Next meeting to be organized during next week • URGENT and being followed-up: clarify ventilation flows, propose pressure cascade and sectorization • Small document to be prepared? • Thermal loads evaluation in the installation M. Calviani - CENF PTM 19th September 2013