page 1 of 11 an approach for the analysis of r&d needs and facilities for fusion energy aries...

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An approach for the analysis of R&D needs and facilities for fusion

energy

ARIES “Next Step” Planning Meeting

3 April 2007

M. S. Tillack

??

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Our external advisory committee will help us define broad R&D

requirements for the commercialization of fusion

Customer-derived requirements for a

power plant (Starlite)

No public evacuation plan

No geological waste

No disturbance of public

No abnormal risk to workers

Closed tritium fuel cycle on site

Ability to operate at partial load

Ability to maintain power core

< 0.1 major unscheduled shut-down/yr

Competitive COE

Customer-derived R&D needs

Demonstrate operability of the tokamak and power systems

Demonstrate control of key parameters

Demonstrate power handling capability, electricity generation

Demonstrate worker safety under normal and off-normal conditions

Demonstrate a closed fuel cycle and ability to manipulate breeding

Demonstrate remote maintenance

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How will we translate advisory committee recommendations into design

requirements and conceptual design priorities?

Customer Needs

Mission

Present Database

Requirements

Reactor Conceptual

Design

Issues & R&D Needs

R&D Implementation

The Starlite Methodology is still relevant, but needs to be applied to experimental

devices

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For a power plant operator (the customer), the focus will be on

integrated rather than component issues

Plasma

Blankets

Divertors

Magnets

Vacuum vessel

Power management

Reactor control

Fuel management

Maintenance

Safety

Waste

Our work should adopt a more “holistic” approach

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Examples of integrated issues for system studies of experimental power

reactors Thermal power management: Demonstrate in-vessel power

and particle handling, extraction of power core high-grade heat, nuclear performance of ancillary equipment (rf, magnets, etc.)

Fuel management: Demonstrate “birth to death” tritium management in a closed loop with self-sufficient breeding.

Safety: Demonstrate public and worker safety of the integral facility, capturing system to system interactions.

Plant operations: Establish the operability of a fusion energy facility, plasma control, reliability of components, inspectability and maintainability of a power plant relevant tokamak.

Flexibility: Explore alternative operating modes and power core technologies with high duty cycle, but flexible operations.

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An experimental reactor design will require more emphasis on operational

concerns and demonstration of the achievement of goals

E.g.,

Diagnosis and monitoring of plasma and plant conditions

Less than a tokamak experiment, more than a power plant

Control (variation) of key parameters

Transient response (partial power, power fluctuations, accelerated breeding, …)

System interfaces, interactions and interdependencies

Previous ARIES studies tended to emphasize an optimum baseline “equilibrium” point.

In this study, we want to explore sensitivities, interdependencies, transients, etc.

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Thermal power management: Demonstrate in-vessel power and particle handling, extraction of power core high-grade heat, nuclear performance of ancillary equipment (rf, magnets, etc.)

Example:

1-frad,div

Pfusion

Pn

PDivertor

First wall, PFC’s

Prad,chamb

Pdiv

Pcond

Prad,div

frad,core

1-frad,core

frad,div

Blanket Cooling

Requires e.g. controlling and tracking all power flows, measuring stresses and temperatures, extracting materials coupons, post-test examination, …

Can we study these with a combined system code w/physics & engineering?

Plasma engineering

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Fuel management: Demonstrate “birth to death” tritium management in a closed loop with self-sufficient breeding.

inventory

pumps

breeder

coolant

breeder processing

coolant processing

vacuum processing

fueling

D+T

D+T+

n

TFuelprocessing

Example:

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Do we want this?

(C. Gentile, HAPL presentation, 9 Aug 2006)

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A design requirements document is the first step toward an experimental fusion power

reactor

ARIES

CTF/FDF/EPR/TNS/FED/etc.

This study is timely, and could be the precursor for a real facility

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ITER/FIRE

ARIES “next step”

Starlite

2010 2030 2050

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