1. Access Hall Study for Cryogenics High Energy Accelerator Research Organization KEK- LC Project Office Masanobu Miyahara 2 Nov. 2015

2. Cryogenics Sys. He Compressor 6 kV Substation Cryogenics System Mechanical SM 6kV Substation He Compressor Cryomodule Install Station Access Hall Cavern Main Linac Tunnel 180,000 (107,000) Mechanical Sub Machine Access Station Access Hall Main Linac Tunnel Access Tunnel Underground Facilities for Cryogenics System Main Linac Tunnel 56,000 51,000 TDR

3. Cryogenics Sys. 6 kV Substation Mechanical Sub Machine 13 New Baseline

4. Surface Facilities @new Baseline He Compressor 29*35 Cryo Hall 27*42

5. 5 Construction Cost ＞ QuntityUnit PriceCost ×6 Access Hall 107 m3,700 kJPY/m Surface Yard Total QuntityUnit PriceCost ×6 Access Hall 13 m3,700 kJPY/m Building 2,100 ㎡ 200 kJPY/ ㎡ Surface Yard 2,850 ㎡ 50 kJPY/ ㎡ Total Construction costs compared with TDR baseline ＝ xxxxxxxxxxxxxx CFS Construction Cost Study Construction Cost

6. Surface Facilities @New Baseline

7. Utility Hall Accelerator Assembly & Entrance Hall Access Tunnel Cooling Tower Cryogenics Hall & He Compressor ML Tunnel AH Access Station for Accelerator Access Station Area: approx. 10,000 m2

8. Back Up

9. TDR Design Cryogenic plant in Underground Alternative design Cryogenic plant on ground surface W20m x H13m x L180m Designed Ex Area 228 m2 W20m x H13m x L91m Designed Ex Area 228 m2 Schedule (Monthly Progress) month Construction Cost Unit Cost @xxxxxxxUnit Cost @xxxxxxxxx Total xxxxxxx Access Hall Design Configuration 2014 CFS 9

10. Comparison TDR and Revised design TDR Baseline For portal Total length 180m Total length 91m Beam gallery Service gallery Shield wall Connection Hall Beam gallery Service gallery Shield wall Connection Hall New Baseline

11. Access Hall Cavern (Cost Breakdown) ExcavationUnit Price(yen/m3) Quntity(m3) Cost(yen)Total Cost(yen/m3) Arch 7,20029,124 Bench4,30012,060 41,184 RBRB Unit Price (yen/P)Quantity(P)Cost(yen/1.5m) Arch7,40017125,800 Bench5,200841,600 SCSC Unit Price(yen/m2)Quantity(m2/m)Cost (yen/m) Arch7,60024.848188,845 Bench6,60013.32487,938 Access Hall (Main Hall) 合計 Direct UnitP/m180 Total UnitP/m