# Presentation: 199135

## Assembly and Commissioning

- Vince Cianciolo, Paul Huffman
- May 23, 2006

## Project Organization: Work Breakdown Structure (WBS)

## Schedule Overview

- Fully tested B-shield
- Fully tested CV/liquifier   and coil pkg.
- Fully tested insert
- Fully tested 3He system

- Assemble/commission B shield
- Assemble/commission coil package into CV
- Assemble/commission insert in CV
- Assemble/commission 3He system in CV
- Re-install B shield upper half
- Mate neutronics
- Commissioning run
- CD4/data collection :-)

## Gantt Chart

- Duration – 38 months

- Test coil pkg in CV (NCSU)

- Test insert in CV (NCSU)

- Test 3He system in CV (NCSU)

- B-shield installation (FNPB)

- Test entire apparatus at FNPB

- Schedule dominated by repeated cooldown/testing cycles

## Significant Planning Assumptions 

- Internal cryostat components arrive _fully tested_ at cryostat assembly site
- Measurement cell insert
- 3He injection and purification system
- Coil package
- All related DAQ components
- This is hugely important. The full apparatus will require 6-8 weeks for a cooldown cycle and this dominates cost and schedule. As much as possible testing must be done prior to assembly, in parallel and in smaller cryogenic vessels.
- Require ability to test 3He transport w/o external shield
- Otherwise grossly inflates cooldown/warmup cycle time, and mandates lots of handling for delicate shield pieces.
- M&S costs included in estimates for various subsystems (_not_ in this WBS)
- Rails and other infrastructure equipment
- Helium
- Tools
- NCSU is the cryostat assembly site
- Cost totally dominated by technician support (nearly 4 FTE years)
- >$300k labor savings if done at NCSU
- Balances against shipping, disassembly, re-assembly, extra infrastructure
- Assembly requires continuous presence and expertise of the cryostat team for  ~ 2 years
- Probably significantly longer if apparatus and team not geographically close

## Critical Path

- Cryostat vessel
- Installation of subsystems - order not critical
- Schedule removes external B-shield from critical path, which is only needed  more than two years after the start of coil package assembly into the cryostat.

## Schedule Risks/Uncertainties

- Cost and schedule is totally dominated by the number of cooldown cycles required for successful commissioning:
- 3 for coil package
- 4 for insert
- 4 for 3He components
- 3 for integrated tests
- 2 for commissioning run w/ beam, B-shield
- These estimates are our best guess, because it is impossible to know how long it is going to take to diagnose a problem.

## Areas of Interface - Everything

- DAQ
- Neutronics and Shielding
- Cryostat
- Insert
- 3He Components
- Coil package and shielding
- Infrastructure

## Things to take away

- High reliability for subsystems/individual components is essential !!!!!!
- We need to think about reliability in a similar  way that NASA thinks about space projects - If everything works 99% of the time, nothing will work
- Talking (and coming to some agreement) with each other is essential
- Everything fitting together, both mechanically and cryogenically is essential

## Things to Consider

- Is there any way to redefine the scope of the “construction” project (ie. CD4 milestones) to shift to operations phase earlier?
- Schedule doesn’t mesh well with beneficial occupancy of the FNPB external building