Vault-BL1A Shielding Plug

Sept 26, 2012L.Lee

NUCN 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 RequirementsWhat 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 shieldingReplace 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 possibleCosts, 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 (3.8 - 5.7 g/cc)Used at reactors (Ontario – 25 yrs), SNS, TRIUMFNSS has worked with Ellis-Don, Burnco, LaFargeNSS 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-1Replace 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

BL1ATUNNEL

Beampipe to BL1A

ImmovableBlock 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, newYellow – concrete, new (w/ cut-out)

“New” Shielding Layout (Layer A+B)“FIRST-PASS” STUDY : OPTION-1 (STEEL)

Blue – steel, newYellow – concrete, new (w/ cut-out)

“New” Shielding Layout (Layer A+B+C)“FIRST-PASS” STUDY : OPTION-1 (STEEL)

Blue – steel, newYellow – concrete, new (w/ cut-out)

“New” Shielding Layout (Layer A+B+C+D)“FIRST-PASS” STUDY : OPTION-1 (STEEL)

Blue – steel, newYellow – 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 onHigh-density Shielding

Blocks from NSS(Nuclear Shielding Supplies)

High Density Concrete w/ AggregateNuclear Shielding Supplies and Services (NSS)

Concrete/Hematite aggregate shielding blocks – HD (3.8-5.7 g/cc) - Hematite (Fe2O3): 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 m3) - 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

2011 2015201420132012 2016 2017ACTIVITY

J A J OJ A J O J A J OJ A J O J A J OJ A J O J A

Schedule( 2010-2016 )2011 2015201420132012 2016 2017

Cleanup M11,1A/1B roof-beamDismantle PIENU & M13-DS

MESON HALL (& Vault):

Core M13 I-block

Shielding

UCN APPARATUS:Spallation Target & R/HUCN Source

BEAMLINE 1U:Kicker

SeptumDipoleBeamline (incl Quads, PS,…)

Design & Review Order/Fabricate/Deliver

Test

Test

Order/Mod

Order/Fabricate

Design & Review

Design & Review Order/Fabricate InstallTest

Specify/Conceptual design

Design/Fabricate InstallUnInstall

Procure shielding blocksDesign & Review Install

COMMISSION @ TRIUMFBeamline Commissioning

HELIUM LIQUEFIER:

Upgrade He Liquefier System

He Liquefier SystemProcure

UCN Source Commissioning

Install/Test & Run @ RCNP

Procure/Install

Install

Kicker Ceramic Beamtube InstallDesign/Order Fabricate

Install

Test

MILESTONES Shutdown Activities Activities Elsewhere(KEK, RCNP, CERN, Acsion)

Non-Shutdown Activities

Mod. 1VQ4/Q5; BL1V & Shld

InstallInstall

Install

Dismantle M13-US, Mod.Shld

UCN Schedule (Draft)

Design/Order/Fabricate Test

Install

Install

Design/Fabr

UCN Installation Schedule

N

2014 Shutdown

2015 Shutdown

2015 Non-Shutdown& 2016 Shutdown