Vault-BL1A Shielding Plug Sept 26, 2012 L.Lee

N UCN Installation-1: 2014 Shutdown Shielding “Plug” will need to be reconfigured

“Existing” Vault-BL1A Shielding Plug What is the required shielding “plug” thickness between the Vault & BL1A? When UCN beamline (septum & dipole) is installed, the shielding “plug” between the Vault and BL1A tunnel will need to be reconfigured. CYCL. VAULT BL1A

Vault-BL1A/1U Shielding Plug Footprint of the shielding plug will be reduced slightly. What are the requirements for the “new” shielding plug with BL1U installed? How thick does the “new” shielding plug need to be? CYCL. VAULT BL1A BL1U

Vault-BL1A/1U Shielding Requirements What are the requirements for the shielding “plug” with BL1U installed? (Preliminary discussions with A.Trudel) - Prompt Radiation Hazard (PRH) Study - Based on occupancy in 1A/1U tunnel with beam ON in vault:  Dose rate in accessible areas < 100  Sv/hr  Annual personnel dose limits from chronic losses < 1 mSv - Dose rate constraints for various accidental full beam loss scenarios (e.g. accidental insertion of 1A stripper, failure of 2AVB1 bender)  Dose rate outside shielding < 50 mSv/hr  Dose limit per full loss event < 1 mSv How thick does the “new” shielding need to be? - Based on dose rates from various scenarios mentioned above (PRH study, simulation studies, surveys/measurements) - Design to maintain overall effective thickness (   t ) in shielding “plug” Is a Shielding-Plug “Task Force” needed? Layout Option: Maintain effective thickness of shielding Replace some of the concrete w/ higher density mat’l

Vault Elements

Higher Density Shielding Materials Replacing some concrete blocks with higher density material Issues/Considerations: - Re-use existing concrete blocks, as much as possible Costs, Storage  fewer removed blocks (potentially activated) - Combine with denser (Steel) blocks - Combine with denser (Hematite-aggregate concrete) blocks Concrete/Hematite aggregate shielding blocks (from NSS) Variable/Customizable density ( g/cc) Used at reactors (Ontario – 25 yrs), SNS, TRIUMF NSS has worked with Ellis-Don, Burnco, LaFarge NSS Meeting at TRIUMF on Sep.10, 2012 (M.Chopra) Layout Options (“First-Pass” study): (1) Replace some concrete w/ steel blocks ( ~ 3:1 thickness ratio) (2) Replace some concrete w/ aggregate blocks ( ~ 2:1 thickness ratio)

Shielding Plug Layout: Option-1 Replace some concrete with steel blocks ( ~ 3:1 thickness ratio) “First-Pass” study using SolidWorks 3D-Model of Meson Hall West

SolidWorks 3D-Model of Meson Hall West CYCL. VAULT BL1A TUNNEL

Beampipe to BL1A Immovable Block East (to T1, T2, TNF) Existing Shielding (Layers A-D) (UPPER LAYERS E-J HIDDEN) Vault-1A “Plug”

Existing Shielding (Layers A+B+C) (LAYER D & UPPER LAYERS E-J HIDDEN)

Existing Shielding (Layer A+B) (LAYERS C+D & UPPER LAYERS E-J HIDDEN)

Existing Shielding (Layer A) (LAYERS B+C+D & UPPER LAYERS E-J HIDDEN)

“New” Shielding Layout (Layer A) “FIRST-PASS” STUDY : OPTION-1 (STEEL) Blue – steel, new Yellow – concrete, new (w/ cut-out)

“New” Shielding Layout (Layer A+B) “FIRST-PASS” STUDY : OPTION-1 (STEEL) Blue – steel, new Yellow – concrete, new (w/ cut-out)

“New” Shielding Layout (Layer A+B+C) “FIRST-PASS” STUDY : OPTION-1 (STEEL) Blue – steel, new Yellow – concrete, new (w/ cut-out)

“New” Shielding Layout (Layer A+B+C+D) “FIRST-PASS” STUDY : OPTION-1 (STEEL) Blue – steel, new Yellow – concrete, new (w/ cut-out)

List of “Removed” Concrete Blocks:List of “New” Blocks: (2) 12’ x 6’ x 4’(Layer A, C)(5) 2’ x 3’ x 6’ steel (Layer A) (7) 2’ x 3’ x 6’(Layer A)(1) 2’ x 3’ x 6’ steel*(Layer A) (1) 6’ x 3’ x 2’(Layer C)(2) 2’ x 3’ x 6’ concrete* (Layer A) (5) 2’ x 3’ x 2’(Layer D)(1) 6’ x 3’ x 2’ concrete* (Layer C) (6) 2’ x 3’ x 2’ steel (Layer D) (38% of existing) *block with “cut-out” for 1U beampipe Vault-1A Shielding Layout (Layers A-D) EXISTING vs “NEW” (OPTION-1, STEEL)

List of “Removed” Concrete Blocks:List of “New” Blocks: (2) 12’ x 6’ x 4’(Layer A, C)(7) 2’ x 3’ x 6’ aggregate (Layer A) (6) 2’ x 3’ x 6’(Layer A)(1) 2’ x 3’ x 6’ aggregate*(Layer A) (5) 6’ x 3’ x 2’(Layer A, B, C)(2) 2’ x 3’ x 6’ concrete* (Layer A) (4) 2’ x 3’ x 2’(Layer D)(1) 6’ x 3’ x 2’ concrete* (Layer C) (8) 2’ x 3’ x 2’ aggregate (Layer D) (42% of existing) *block with “cut-out” for 1U beampipe Vault-1A Shielding Layout (Layers A-D) EXISTING vs “NEW” (OPTION-2, AGGREGATE)

More Information on High-density Shielding Blocks from NSS (Nuclear Shielding Supplies)

High Density Concrete w/ Aggregate Nuclear Shielding Supplies and Services (NSS) Concrete/Hematite aggregate shielding blocks – HD ( g/cc) - Hematite (Fe 2 O 3 ): Coarse [1”  3/8”] & Fine [3/8”  100 mesh] components Established history of use at reactors and accelerators - Ontario Hydro (20 yrs, P.Mukherjee: Study of long-term effect on HD concrete at reactors) - BNL AGS (ilmenite, roof beams: 33 ton, blocks: 21, 11, 0.5 – 2 ton) - SNS Tunnel (hematite, 3.85g/cc, poured in place, 2000 m 3 ) - TRIUMF NSS has worked with Ellis-Don, Burnco, LaFarge Used in both radiation & non-radiation applications: - high density radiation shielding - linear accelerator vaults & treatment rooms - high dose rate HDR rooms - mass concrete projects - high density concrete applications columns - gravity seawall, coastal protection & breakwater structures - bridge counterweights - ballast for ocean vessels and off shore platforms - noise and vibration dampening Coarse Hematite Fine Hematite

Charles River Suspension Bridge in Boston, MA NSS HD-concrete (Non-radiation Applications) HD-concrete Back-spans

Breakwater Structure Utilizing High Density Concrete NSS HD-concrete (Non-radiation Applications)

EXTRA

ACTIVITY J A J O J A Schedule( ) Cleanup M11,1A/1B roof-beam Dismantle PIENU & M13-DS MESON HALL (& Vault): Core M13 I-block Shielding UCN APPARATUS: Spallation Target & R/H UCN Source BEAMLINE 1U: Kicker Septum Dipole Beamline (incl Quads, PS,…) Design & ReviewOrder/Fabricate/Deliver Test Order/Mod Order/Fabricate Design & Review Order/Fabricate InstallTest Specify/Conceptual design Design/FabricateInstallUnInstall Procure shielding blocksDesign & Review Install TRIUMF Beamline Commissioning HELIUM LIQUEFIER: Upgrade He Liquefier System He Liquefier System Procure UCN Source Commissioning Install/Test & RCNP Procure/Install Install Kicker Ceramic Beamtube Install Design/OrderFabricate Install Test MILESTONES Shutdown Activities Activities Elsewhere (KEK, RCNP, CERN, Acsion) Non-Shutdown Activities Mod. 1VQ4/Q5; BL1V & Shld Install Dismantle M13-US, Mod.Shld UCN Schedule (Draft) Design/Order/FabricateTest Install Design/Fab r

UCN Installation Schedule N 2014 Shutdown 2015 Shutdown 2015 Non-Shutdown & 2016 Shutdown