shape memory application for nuclear safety or proliferation
DESCRIPTION
This was a design project assignment presented in the University of Manchester.TRANSCRIPT
GROUP YELLOWGROUP YELLOW
WANGWANG ChaoChao
LI LI XiaoqianXiaoqian
XING XING
HanfangHanfang
TIAN YeTIAN Ye
EZEANYAGU EZEANYAGU PATRICKPATRICK
ALEXALEX
NYARKO
NYARKO
2
SHAPE MEMORY APPLICATION FOR
NUCLEAR SAFETY OR
PROLIFERATION
Our topic
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NUCLEAR DISASTER
Chernobyl 1986 Fukushima 2011
Shape Memory Materials (SMM)
What is it?
Shape memory materials are
materials which can ‘remember’
its original shape, and can revert to the pre-deformed shape by external stimulus(temperature, light, voltage,
etc.).
How is it classified
SMM
Shape-memory hybrids
shape-memory polymers
shape-memory alloy
shape-memory ceramic
Why do we choose it?
Reverts to its
original shape
Good flexibility
and elasticity
Nuclear Power Plant How the nuclear reactor works
Applications In Nuclear Safety
♦ Direct-action(self-operating) emergency systems
♦ Nuclear radiation protective clothing
Application in Direct-emergency Cooling System
Application in Direct-emergency Cooling System
Justification of Ni-Ti-Pt Alloy
Ni-Ti alloy Platinum
Thermal Mechanical
NI-Ti-Pt alloy (SMA)
Thermal: Thermal: undergoing martensitic transformation at temperatures exceeding 300ᵒC
Mechanical: Mechanical: Hardness properties
From the Ashby’s diagram, Ni alloy shows interesting properties that justifies its use in terms of:
StrengthModulusMaximum service Temperature
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• Lead clothing is generally used for high level nuclear radiation protection.
• POLYCAPROLACTONE is biodegradable polyester that exhibits shape memory effect when exposed to radiation (Gamma rays).
• Its crystallinity increases as radiation dose increases.
• An outer layer of polyester (polycaprolactone) incorporated in the Pb clothing provides additional protection from nuclear radiation.
Nuclear Radiation-protective Clothing
14
Polycaprolactone crystalline formRadiation protective clothing
Nuclear Radiation-protective Clothing
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REFERENCES
• G. Zhu , G. Liang, Q. Xu, Q. Yu. Shape-Memory Effects of Radiation Cross-
linked Poly (-caprolactone). Journal of Applied Polymer Science. Volume 90, Issue 6, Article first published online: 8 SEP 2003. http://onlinelibrary.wiley.com/doi/10.1002/app.12736/pdf. Accessed 2 FEB 2012.
• D. Stoeckel, “Shape Memory Actuators for Automotive Applications”, materials & design vol. 11 no.6 december 1990
• Li-Bin Niu,Toshio Sakuma,Yoshihiro Sakai Hideki Kyougoku and Hiroshi Takaku,"Hot Water Jet Erosion Characteristics of Ti-Ni Shape Momery Alloys"
• R.R Ionaitis and D.B Chernov ,"On Possibilities to Accelerate Engineer Application of Shape Momery Alloys"
Thank you !
By yellow group
