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ANSTO is Australia’s only nuclear science and technology facility Home of the new OPAL reactor One of the world’s best nuclear research reactors PowerPoint PPT Presentation


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ANSTO is Australia’s only nuclear science and technology facility Home of the new OPAL reactor One of the world’s best nuclear research reactors. The work we do addresses some of the key challenges of our time

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ANSTO is Australia’s only nuclear science and technology facility Home of the new OPAL reactor One of the world’s best nuclear research reactors

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  • ANSTO is Australia’s only nuclear science and technology facility

  • Home of the new OPAL reactor

  • One of the world’s best nuclear research reactors


  • The work we do addresses some of the key challenges of our time

  • Climate change, water resource management, materials engineering & other scientific disciplines

  • We have the world’s most advanced neutron scattering capabilities


  • ANSTO also produces radiopharmaceuticals

  • Used by hospitals, GPs and dentists daily

  • In fact - if you’ve had an X-ray, you’re doctor probably used radiopharmaceuticals from ANSTO


Neutron Scattering – Inside one of the world’s best neutron research facilities

Professor Michael James

August 2010


Batteries

Areas of Neutron Science

Phase Transitions

Energy

AtomicStructure

Nanotechnology

ComplexFluids

MolecularBiology

Engineered Materials

Cell Biology

Food

MagneticMemory


Research Reactor vs Power Reactor

Power: 20 MW 3000 MW

Uranium: 30 kg 100,000 kg

Temp: 60 C 100 C

Uses: Generates neutrons for Generates steam for

Radioisotopes, Si and Science Electricity


fissionfragments

neutrons

energy

neutron

U-235

Neutrons lose energy by colliding with heavy water (D2O) around the core.

This generates heat.

What Happens During Fission?


~450 m/s

To Here

From Here

Neutrons travel ~80 m in 0.04 s

Cold Neutrons(-250 C)~800 m/s

Neutrons: Faster than a speeding bullet

Thermal Neutrons(60 C)~2000 m/s

(Cherenkov Radiation)


X-rays vs Neutrons

Neutrons scatter from the nucleus

Scattering depends on isotopes:1H (hydrogen: 1e-, 1p+) is different to2H (deuterium: 1e-, 1p+, 1n)

X-rays

neutrons

X-ray scattering depends on atomic number (Z).

X-rays scatter from the electron cloud

According to neutrons ~99.9999999% of matter is “empty space”


Mostly nothing!!!

It can be adsorbed.

(neutron radiography)

Allows us to study materials under extreme environments:

Temperature -271 C to 1600 C

Pressure: Up to 10,000 atm

Magnetic Field:12 Tesla

Sometimes, it scatters…

This is what we measure in neutron scattering experiments.

What Happens When a Neutron Hits Matter?


Neutron Instruments

Quokka

Platypus

Wombat

Koala

Kowari

Taipan

Echidna

Sika

Dingo

Kookaburra

Bilby

Pelican

Emu


Three Axis Spectrometers

Neutron Scattering

Instruments

at OPAL

TaipanSika

Radiography

Dingo

NANOSTRUCTURES

Polarization Spectrometer

Pelican

Backscattering

Emu

High Speed

Diffractometer

Wombat

USANS

Kookaburra

High Resolution

Diffractometer

Echidna

Reflectometer

Platypus

Residual Stress

Kowari

Quasi-Laue

Diffractometer

Koala

ATOMICSTRUCTURES

Small Angle Scattering

Quokka

Bilby


New Energy TechnologiesCorrelating Properties with Atomic Structure(Neutron Powder Diffraction)

Gives the location of light elements in the presence of heavy metal atoms.

Battery Materials

Solid Oxide Fuel Cells

Hydrogen Storage

Monitoring of atomic structure during device application.


5min/run

60hrs

2q

115

20

In-situ Diffraction of Li-ion Battery Cycling

Charged

Discharged


(Stress determination to improve the reliability of critical components)

Non-Destructive Testing of Engineered Materials

Non-destructive mapping of mechanical stresses.

When pipelines get stressed…

Welds, joints, hardening, quenching…Metals, alloys and composites…

From the production line or after use.


Surfactants

Stabilised Polymer Emulsions

Conducting Polymers

Liquid Crystals

Materials used in countless industrial preparations are based on molecular nano-composites

Neutrons and Nanotechnology

BiomolecularInteractions


Data in modern digital devices is stored on nanoscale magnetic thin films

Nanoscale Thin Films(Neutron Reflectometry)

Study of diseases such as cholera, Alzheimer’s, and pneumonia are possible using artificial cell membranes

Neutrons can probe both structure and magnetism

Vapour given off from explosives can switch-off light-generating molecules called dendrimers


Any Questions?


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