# Presentation: 801193

_***J.H. Schultz***_
_**M.I.T. Plasma Science and Fusion Center**_
*** ***
**FIRE PVR Planning Meeting******
****
- June 25-26, 2003

- Experimental Plan
- and Refrigeration Requirements

- Baseline

- 4 Shot Types x 2 Modes

- H-Mode: H, DD, DT

- AT-Mode: H, DD, DT

- Tune, Short, Medium, Long
- 3.8 MA x 5 T not shown

- Typical Shot Allocations

- Both sized for 16 years

- Self-consistent Shot Allocations

- Shot Totals

**Nearly equal nos. of H/D and DT shots**
**Small fraction of Full B, I, ********H-Mode shots**
**> 1600 "most-valuable" AT: 150 MW x 35 s extended ops shots**

- 9 hours to do 25 H/D shots to 6.6 T
- 14.4 hours to do 25 H/D shots to 10 T

- Shift Times as f(Recool)-H/D Baseline

- 12 hours to do 25 DT shots to 6.6 T
- 18 hours to do 25 DT shots to 10 T

- Shift Times as f(Recool)-DT Baseline

- Effects of Extended Operations
- and 3D Neutronics

**Sawan, Source Geometrical Effects..., 4.17.2003**

**Extended operations: all nuclear dosages exactly double**
** ****2.14 m and 3D Calcs: Peak insulation rads down x 1.45 to 8.71 x 10****9**** Rad**
**Extended: 1.75 x 10****10**** Rad**

- Use of MITR for
- Insulation Testing

- Less expensive, faster turnaround time than ATR
- $40 k/1 day, $50 k/1 wk, $60 k/1 wk+1 day
- e-beams less attractive at lower dose – can "overshoot" in a week with no's
- "3D no dose" – 1.75 x 1010 rads in 2 days
-         -test 100's of disks

- Insulation SBIR's

- 4 SBIR's awarded, last week: 3 to CTD, 1 to MC (Rice)
**CTD- Phase II – insulation with better resin-metal bond**
**	****- includes irradiation in MITR**
**	****- results not available by PVR**
**CTD – Phase I – higher T insulation**
**	****- 100 C (for sure), aim for 150 C**
**3)****	****Ceramic weave prepreg – less expensive fibers**
**4)****	****MC – Phase I – ceramic with good COE match**

- TF Energy Loss (GJ) vs. Bt, flattop

- lN2 Consumption vs. Experiment Type

**10 T shots < 10 % of H/DD, < 1/3 of DT lN2 consumption**
**10 T/long pulses 2 % of DD, 6 % of DT lN2**

- Standby & cooldowns small overall fraction
- lN2 usage doubles from 320 to 664 Mgal
- Was 750 Mgal for baseline

- lN2 Requirements: Baseline and Extended

## BOC/AIRCO (M. Berlinger, J. Flaherty)CY2000 estimate: $0.15/100 cu ft: 10 years, $0.2/100 cu ft: 15 years; 750 MgalCY2003 estimate: $0.15/100 cu ft: 10 years, $0.2/100 cu ft: 15 years, 3 Bgal	- escalation balanced economy of scale	- requested 2:1 peak/avg annual, got 1.13:1 (Main uncertainty?)Getting estimate from Air Products (B. Kenworthy) – recommends closed-cycle

**BOC/AIRCO (M. Berlinger, J. Flaherty)****CY2000 estimate: $0.15/100 cu ft: 10 years, $0.2/100 cu ft: 15 years; 750 Mgal****CY2003 estimate: $0.15/100 cu ft: 10 years, $0.2/100 cu ft: 15 years, 3 Bgal****	****- escalation balanced economy of scale****	****- requested 2:1 peak/avg annual, got 1.13:1 (Main uncertainty?)****Getting estimate from Air Products (B. Kenworthy) – recommends closed-cycle**

- Assumed $0.25/100 cu ft/Baseline & Extended

- Back to the Trucks?

- Most flexible solution
- Little improvement for 2 days storage:
- 	(originally based on 5 shots/day @ 3 hr cooldown)
- Baseline operation: 96 trucks/2 days
- Extended operation: 130 trucks/2 days
- 	- only increased shots/day by 40 % (weeks by 40 %)

- lN2 Vented Options

- Open N2, He purge selected

## Closed-cycle option vs. lN2 with Helium Purge

**Closed-cycle option vs. lN2 with Helium Purge**

- Not costed – higher capital cost
- Subcooled helium can be used for 50 K magnets

- Refrigeration Work for PVR

**1.) Design, sizing, costing for two topological options**
**	****- open N2, He flush, closed-cycle N2 and He**
**2.) Baseline and extended operation**
**	****- self-consistent experiment plan/recool & lN2 usage**
**	****- redo baseline for revised estimate of lN2 usage**

## Insulation Work for PVR

**1.) Review insulation structural properties vs. radiation dose**
**2.) Relate insulation strength to performance requirements**
**	****- baseline and extended**
**3.) Review recent, ongoing R&D, SBIR's**
**	****- cyanate esters, organic-inorganic hybrids**
**4.) Propose FIRE insulation R&D plan**