200 kton Water Cherenkov Detector Liner F Feyzi F. Feyzi ANT11 11 October, 2011
Outline Outline • Water containment for 200 kton • Reasons and background for choices g • Interface to other subsystems • What have we learned from firms What have we learned from firms • Material considerations 11 October 2011 2 F. Feyzi ANT11
200 kton cavern Located at 4850 ft • level One cavern only • near Yates Shaft Remove rock at • bottom (5117 ft level) to Ross Shaft Access for detector • work at 4850 only k t 4850 l 11 October 2011 3 F. Feyzi ANT11
Definition Definition • Vessel is the structural components to resist water load and support detector components • Liner is the water proofing and leak collection components p Both are needed and integrated 11 October 2011 4 F. Feyzi ANT11
Size Comparison p and Liners Super-K SNO 4mm SS liner on 350mm reinforced concrete and H- i f d t d H 7mm sprayed liner on beam vessel 300mm shotcrete WCD-200 WCD 100 WCD-100 2 5 mm sheet 2.5 mm sheet liner on 300 mm 1.5 mm sheet liner shotcrete on 350mm reinforced concrete vessel 11 October 2011 5 F. Feyzi ANT11
200 kton Parameters Physics Physics Volume 200k m 3 Sensitive Volume 240k m 3 3 240k 11 October 2011 6 F. Feyzi ANT11
General Scope of Liner General Scope of Liner Scope of responsibility: • – On wall is from neat line to water – On floor is from slab to water – Interface and sealing to deck Interface and sealing to deck – Interface to PMT supports Extent of supply: • – Full design of liner – Recommendation of materials (selection is LBNE responsibility) p y) – Construction and installation of liner – QA and leak check – Installation of magnetic compensation coils 11 October 2011 7 F. Feyzi ANT11
Status of Liner Design g 100 kton Conceptual Design with many options was • d done by CNA/HHM/SGH (DocDb 3150) b CNA/HHM/SGH (D Db 3150) 100 kton was evaluated with liner on shotcrete vs liner • on concrete vessel on concrete vessel Cost and schedule estimates and peer review done • 200 kton cost was scaled from 100 kton • 200 kton was re-evaluated as part of conventional p • facilities contract RFI for design and construction 200kton send to • companies responses received companies-responses received 11 October 2011 8 F. Feyzi ANT11
Options Studied Integrated with Pressure Free Standing Rock Balanced 11 October 2011 9 F. Feyzi ANT11
Free Standing Options • Concrete option 1A • Steel Option 1B – Less costly – Most robust but costliest – Walls thicker Walls thicker – Can use metal or polymeric C t l l i liner – Can use metal or polymeric liner – Magnetic issues more complex l Not feasible for 200 kton 11 October 2011 10 F. Feyzi ANT11
PMT Supports St Strong vessel with l ith • steel or concrete allows attachment directly to wall directly to wall Smooth and flat • wall allows good position iti This was our • baseline support design for a steel or concrete vessel 11 October 2011 11 F. Feyzi ANT11
Rock Integrated Options • Integrated option 2A – 35 cm reinforced concrete vessel – Can resist external pressure – Mount PMTs directly to wall CNA Engineers 11 October 2011 12 F. Feyzi ANT11
Rock Integrated Options • Integrated option I t t d ti 2C – Liner directly on shotcrete Liner directly on shotcrete – Cavern design team has determined rock motions are very small so this is feasible CNA Engineers 11 October 2011 13 F. Feyzi ANT11
Wall PMT Deployment T. Benson, P. Robl, PSL 11 October 2011 14 F. Feyzi ANT11
Linear PMT Supports pp Use wire rope p • support for PMT assemblies All wall PMTs All wall PMTs • • deployed from deck No attachments and • penetrations on the penetrations on the wall Will require • extensive testing T. Benson, P. Robl, PSL 11 October 2011 15 F. Feyzi ANT11
Wall Liner Construction Concrete vessel in not base option due to cost • Shotcrete, ground support and drainage applied to rock • Magnetic compensation coils installed • Additional shotcrete to smooth and cover coils Additi l h t t t th d il • – Probably need smoothness about 1 in 10 to15 – One supplier says waviness should not exceed 5 cm Penetrations installed at appropriate time • Detector drainage layer installed • Sheet liner installed and welded Sh li i ll d d ld d • Leak check • 11 October 2011 16 F. Feyzi ANT11
Liner Welding and Leak Check g Liner material will come in large rolls and will be • welded in place Fusion and extrusion weld will both be used • Seams will have an overlap with two fusion welds will Seams will have an overlap with two fusion welds, will • allow for air pressure test of space between welds Fusion welds will mostly be used for attachment points • Extrusion welds will be used at penetrations • Leak checking by spark method used on liner • Other methods may also used (vacuum box, gas, etc.) • Conductive liner will facilitate this • 11 October 2011 17 F. Feyzi ANT11
Liner Material Choices Baseline: • J. Youngblood, & B. Ward – Liner: 2.5 mm conductive LLDPE Geomembrane – Drainage layer: 8 mm Geocomposite (Geonet) Alternate: • – Liner: 1.5 mm conductive LLDPE Geomembrane Gundle/SLT Environmental, Inc. Geosynthetic Clay Liners (GCL's) – Drainage layer: Restricted Flow GCL or are composites that combine none geotextile outer layers with a core g y of low-permeability sodium bentonite clay. 11 October 2011 18 F. Feyzi ANT11
Drainage System Drainage System Separate drainage layers for ground water and Separate drainage layers for ground water and • detector leak water Separate collection, they may or may not be combined • in the sump Static pressure rating and longevity must be sufficient • Pressure must not build on liner when detector is Pressure must not build on liner when detector is • • empty Sedimentation in drainage layer should also be • considered i 11 October 2011 19 F. Feyzi ANT11
No Drainage Layer Concept And Possibly “Zero Leak” And Possibly Zero Leak Mi i Minimize effects of i ff t f • leaks by not allowing free flow Do not collect whatever D t ll t h t • does leak Let combine with • groundwater collection d t ll ti Golder Assoc. 11 October 2011 20 F. Feyzi ANT11
Variations on Rock Integrated Options Options • Option B • Option A Option A • • Slip formed concrete under Slip-formed concrete under liner – GCL directly under liner • No leak collection – No leak collection • C Concrete act like GCL ( ? by Farshid) t t lik GCL – Only ground water O l d t collection Golder Assoc. 11 October 2011 21 F. Feyzi ANT11
Estimating L Leak Rates k R t Leakage is, of course, • dependent on size and dependent on size and quantities of defects Must minimize quantity of • penetration 5 defects per hectare is an • achievable number Fill rate is about Leak rate will be specified • 1m 3 per minute as a design parameter 11 October 2011 22 F. Feyzi ANT11
“Leak Free” Design Leak free: It leaks but collect all • leaks This design utilizes a double • lined system to collect all leaks from primary liner from primary liner It is used in hazardous liner • applications and is a well known technology technology This method would be • advantageous in the case we use Gd to allow for full collection and recapture Cost and schedule is the major j • issue with this option 11 October 2011 23 F. Feyzi ANT11
Baseline design design R 32.5 M min min NOT TO SCALE 11 October 2011 24 F. Feyzi ANT11
Magnetic Compensation Magnetic Compensation Horizontal and • vertical coils Power supplies • on deck Passive system • also under evaluation 11 October 2011 25 F. Feyzi ANT11
Wall-Floor Interface (one possibility) ibili ) R 32.5 M min R 31.65 M NOT TO SCALE 11 October 2011 26 F. Feyzi ANT11
Liner Material Considerations • The material of the liner must be compatible with ultra high purity water for up to 30 years with ultra-high purity water for up to 30 years. • LBNE collaboration is responsible for test and selection of liner material from those l ti f li t i l f th recommended by contractor. • Tests have shown that various grades of commonly used polyethylene sheet liners materials are acceptable. • Tests on cold-fluid applied liners have shown that they do not perform as well and may not b be acceptable. t bl 11 October 2011 27 F. Feyzi ANT11
Liner Material Testing Close to 50 samples for the liner materials tested Carlisle coating butyl (PSL VL 008) Cooley Group RPP ‐ 7845 JWPW05 (PSL VL 001) 11 October 2011 M. Yeh, S. Hans 28 F. Feyzi ANT11
List of Good Material 11 October 2011 M. Yeh, S. Hans 29 F. Feyzi ANT11
Li e Liner Attachment 11 October 2011 30 F. Feyzi ANT11
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