ucn facility working group october 3, 2012 overviewl.lee mcnpx and shieldingp.carlson beam...

UCN FacilityWorking Group

October 3, 2012

Overview L.LeeMCNPX and Shielding P.CarlsonBeam Monitors C.A.Davis / A.Konaka

UCN FacilityWorking Group

October 3, 2012

Overview L.Lee - Schedule & 2014 Shutdown - Decisions about beamline configurations - High-density shielding (Vault-1A “Plug”, UCN Pyramid) - Shielding needs (Monte Carlo studies)

MCNPX and Shielding P.CarlsonBeam Monitors C.A.Davis / A.Konaka

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

N

Kick direction (vertical or horizontal)Shielding “Plug” will need to be reconfigured

UCN Installation 2014

Decisions aboutbeamline configurations

Transporting the split beam from the kicker through the existing beam apertures

UCN Installation 2015 (Option 3f)

N

T1study

UCN Installation 2015 (Option 3g)

N

T1study

High-densityShielding

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

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)

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”

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)

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)

UCN Installation 2015/2016 (Option 3f)

N

High-densityNon-magnetic

Shielding

Dose Limit: 3 Sv/h outside of shielding

EXTRA

UCN Installation Schedule

N

2014 Shutdown

2015 Shutdown

2015 Non-Shutdown& 2016 Shutdown

Optics Studies

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

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)