# Presentation: 840192

## M. Ulrickson
Area Coordinator PFCs

**ITER First Wall and Shield****ITER Port Limiters**

- M. Ulrickson
*Area Coordinator PFCs*

**February 28, 2006**

***Sandia National Laboratories***

***First Wall & Shield***

- Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company,for the United States Department of Energy’s National Nuclear Security Administration under contract DE-AC04-94AL85000.

## Scope
Cost Estimate
Funding Profile
Contingency
Schedule and Milestones
Risk Management
Issues

**Cost Estimate**
**Funding Profile**
**Contingency**
**Schedule and Milestones**
**Risk Management**
**Issues**

**Outline**

## Scope

**Twenty percent of the First Wall and Shield for ITER**
**Approximately 120 m****2**** (3 toroidal rows) of the First Wall area**
**Tentatively rows 8, 16 and 17**
**One spare shield module and 5 spare First Wall panels are included**
**375 FW and 93 SM panels must be made**
**Two Port Limiters**
**On opposite sides of the machine**
**Each about 3.5 m****2**
**Includes port nozzle supports and limiter adjustment hardware and actuator for motion**

## Overview of US Contribution

## Scope

**The US will contribute ~20% of the First Wall/Shield for ITER**
**Module 8, 16 and 17 of the FW/Shield add up to 20% of the FW area**
**Modules 16 and 17 have 36 modules around torus**
**Shield module weight ~3.6 T **
**PFC area ~1.4 m****2**
**PFC weight ~0.9 T**
**Module 8 has 18 modules around the torus**
**One spare shield and 4 spare FW are required**

- 17

- 16

- 8

## Comparison of SM 8, 16 and 17

## Module 18 Cooling Pipes

## Module 18 from Plasma

## Mod 18 Side View

## Mod 18 View from Mod 17

## Typical First Wall Panel

## Be to Cu Joining Experience

- US HIP bond w/AlBeMet interlayer (1000 cycles at 10 MW/m2)

- EU HIP bond with Ti interlayer (1000 cycles at 2.5 MW/m2)

- Russian Fast Amorphous CuInSnNi Braze (4500 cycles at 12MW/m2)

## FW Production Scaling

- R&D Mockups

- Qualification mockup

- Production Component

## Quantities for FWS Fabrication

**Be tiles:****	****~49,000 (50X50X10 mm) 2.3 Mg**
**FW panels: 375 assemblies (79 Mg)**
**Shield Modules: 90 each with 4 FW (plus 3 spares) 329 Mg**
**Manufacturing assumptions:**
**FW panels produced at the rate of 18 assemblies per quarter (one every 3 days)**
**SM produced at the rate of ~4 per quarter (one every 2 weeks keeps up with FW production)**

## Port Limiter

**The port limiter must be adjustable in two planes and able to move 80 mm each shot (in and out) in as little as 5 sec.**
**The limiter head weighs 4.5 Tonnes (two PL on ITER)**
**The maximum heat flux is 8 MW/m****2**** (may be revised)**
**The surface shape is still subject to revision**
**There is a pretty good pre-conceptual design (the IT has promised CATIA models)**
**Each PL has a complex actuator for motion**

## Details of PL PFC

## Port Limiter Support and Adjustment

## Quantities for PL Fabrication

**Plasma facing Be tiles: ~440,000 (4X4X4 mm) ; 50 kg**
**Limiter Head: 37 plates (650X45x2100 mm); ~ 4000kg (each head)**
**Most likely fabricated as individual plates and joined by welding**
**Be and Cu joined by HIP before plates are joined**
**Possibly cast with Cu face and Be joined by HIP**
**Option for hypervapotron should be considered **
**Two port nozzle supports and actuators**

## Port Limiter Requirements

**Alignment**
**Adjustable in both horizontal and vertical planes to      +/- 0.5 mm**
**Radial motion 8 cm in 5 sec**
**Radial accuracy and repeatability +/- 0.5 mm**
**Heat loads**
**8 MW/m****2**** during start up and shut down (50 s each)**
**0.5 MW/m****2**** during plasma burn (retracted)**
**1.0 MJ/m****2**** in 1 ms during disruption**
**0.78 MW/m****2**** nuclear heating at plasma surface**
**Current loads**
**100 kA halo current**
**Disruption induced eddy currents**

## Cost Estimate

## FWS and PL Milestone List

**Begin FW R&D****	****March 1, 2006**
**Complete FW R&D****	****May 2008**
**Complete FW and SM design****	****July 2007**
**Begin FW&S Prototype Fab****	****June 2007**
**Begin SM Prototype Fab****	****January 2008**
**Begin Fabrication of SM****	****December 2008**
**Begin Fabrication of FW****	****November 2008**
**Begin Assembly of FW to SM****	****February 2009**
**Complete PL R&D****	****June 2011**
**Begin Fabrication of PL****	****October 2011**
**Ship first SM assembly to ITER****	****November 2011**
**Project Completion****	****September 2014**

## Progress Since March 2005 Review

**Design**
**Problem with cooling of SM resolved by adding “T” flow divertor under plasma facing surface (joint work with IT)**
**Requirement for complex coaxial flow divertors relaxed by understanding where the IT thought they were necessary (not everywhere but only occasionally); simplified cooling scheme**
**Found new hydraulic analysis code that interfaces directly with CATIA (benchmarked code); speeds thermal hydraulic analysis**
**Found a way to simplify first wall coolant attachment (not approved by IT yet)**
**Understand IT logic for SM attachments and coolant supply**

## Progress Since March 2005 Review (cont’d)

**Fabrication**
**Got IT to accept that cast 316LN could be equivalent to wrought material and that they did not need to specify fabrication methods only performance and strength requirements**
**Made formal request for approval of cast 316 LN based on ASME standard**
**Watching EU request for use of powder HIP CuCrZr for FW backing because it might simplify FW fabrication**
**Watching RF request for use of cast CuCrZr for FW backing because it might simplify FW fabrication**

## Summary

**Design and fabrication of 20% of the ITER First Wall/Shield is a technically challenging project but the EDA divertor R&D is beneficial for defining directions**
**Use of industry from the beginning of R&D is essential to increase ability to fabricate the parts & control costs while increasing reliability**
**We have completed the conceptual design of  module 18 and this will speed up the design of 3 new modules because some major issues have been resolved with the IT and the design team has experience with the IT concept.**
**Critical R&D must start as soon as possible in FY06**