Bunker Project Operation aspects Zvonko Lazic Iain Sutton

Bunker Project Operation aspects Zvonko Lazic, Iain Sutton www. europeanspallationsource. se December 2017

Intro ESS Context • Equipment • Activities Maintenance environment • Strategy for maintenance • Logistics

Context • ESS specific context – Long source instruments • Components@ R 6 – Shielding common volume • Vertical access • High Power source issues – Neutron activation – Neutron damage • Project constraints – Minimize initial investment

Dose limits & Zones Legal Maximum acceptable annual dose 10 m. Sv Entry Non rad worker 25 micro. Sv Entry rad worker <2. 5 mil Sv Zone I Requirement; All systems shall be remote handling installation compatible Zone II Requirement; All systems shall be vertical handling installation compatible. ‘Hot’ components shall be remote handling installation compatible > 1 m. Sv/h Strictly controlled access 0. 1 -1 m. Sv/h Restricted access 4

Blocks installation – cranes coverage areas Definition of transfer zones is shown in ESS-0047079. 3 Experimental Hall crane coverage area Cranes crossover (load interchange) area Monolith crane coverage area Third level block and its Co. G 5

Lifting • • Clearance between the bunker roof top and the underside of the crane hook flange is 2, 750 m (+0/-0, 1), The largest block is 0, 65 m tall, This gives available clearance for outrigging (spreader bar), and hook system of 2, 1 m, The largest chopper is ~2 m, Therefore, available clearance for outrigging and hook system of 0, 75 m, Special mountings will be required to ensure installation compatibility, Mitigating low transport clearance (hook height) is done by removing additional blocks to from the rooftop,

Lifting • • The bunker blocks (as well as instrument hardware) can be placed on top of the roof. Shown below are 10 blocks placed on the roof, and ready for the transfer.

Lifting • Mitigating low transport clearance (hook height) is done by removing additional blocks from the rooftop.

Summing up Strategy headlines High reliability Long service intervals Standard interfaces All designed for vertical removal ‘Critical’ systems equipped for remote handling • Common tooling • • •

Crane route Bunker crane Exchange zone Storage zone Hall crane 10

Roof removal – access @ R 6 -R 9 • Example - Freia – Minimum access – 6 blocks 11

Roof removal – access @ R 6 -R 9 • Example - Freia – Minimum access – 6 blocks – Removing chopper – 9 blocks (minimum) 12

Roof removal – access @ R 6 -R 9 • Example - Freia – Minimum access – 6 blocks – Removing chopper – 9 blocks (minimum) – Clearing for short sector full access – 24 blocks (minimum) 13

Roof removal – access @ R 6 -R 9 • Example - Freia – Minimum access – 6 blocks. – Removing chopper – 9 blocks (minimum). – Clearing for short sector full access – 24 blocks (minimum). – Full short sector access with frame beam cleared – 27 blocks 14

Scheduled & Regular Activity Incidence over 10 yr period Beam port systems inspection Neutron chopper maintenance Optics realignment Instrument shutter maintenance Other component maintenance Removal neighboring & Hot Total 40 100 20 20 60 80 320

1. 4 m . 2. 1 m “Another” facility chopper/pit

The Bunker – Operation Aspects Q/A End of presentation Q/A • • 17