logging in or signing up ks4_p3_revision aSGuest58850 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 23 Category: Entertainment License: All Rights Reserved Like it (0) Dislike it (0) Added: August 05, 2010 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Revision forP3: Radioactive Materials : Revision forP3: Radioactive Materials Thursday, 05 August 2010 Learning Objective: To review the key areas in preparation for the P3 Exam. Nuclear Radiation : Nuclear Radiation Comes from the nucleus Nucleus contains neutrons and protons Electrons orbit around the edge Nucleus Electrons Two isotopes of Carbon – both have 6 protons but different numbers of neutrons. 3 Types of Radiation : 3 Types of Radiation Alpha Very ionising Not very penetrating Absorbed by paper or dead skin cells Stopped by only a few centimetres of air Beta Slightly ionising Absorbed by aluminium or half a metre of air Gamma Not very ionising Very penetrating Absorbed by lead or thick concrete Efficiency : Efficiency Efficiency, as a percentage, is worked out by: The more efficient the object is the less energy is wasted or dissipated in an wasteful way Be able to interpret energy flow diagrams Background Radiation : Background Radiation The dose of radiation is measured in sieverts Sv, or millisieverts mSv. What happens when radiation hits a cell? : What happens when radiation hits a cell? Radiation passes straight through If it hits a sex cell it could cause a mutation by changing a gene Damaged – but repairs itself The DNA is damaged and the cell develops out of control – a cancer has begun It is killed Energy Resources : Energy Resources Primary Energy Source: A source of energy not made from any other sort of energy source e.g. fossil fuels and uranium Secondary Energy Source: A source of energy that can be distributed easily but has been manufactured using a primary energy source e.g. electricity Fossil Fuel Power Station : Fossil Fuel Power Station Be able to label a diagram like this Nuclear Power Station : Nuclear Power Station Know the differences between these 2 diagrams Fission : Fission Neutron Chain Reaction : Chain Reaction Uncontrolled – causes a nuclear bomb Controlled – used in a power station Half Life : Half Life The half life of a radioactive substance is the amount of time it takes for the activity (amount of radiation that is given out) to fall to half the previous value. 3 Types of Waste : 3 Types of Waste Low Level e.g. protective clothing and medical equipment Packed in drums and put in a special landfill site Intermediate Level Less dangerous that high level waste High Level E.g. spent/old fuel rods This gets hot as it is so radioactive, it’s kept in a pool of water to absorb the heat Health and Radioactive Materials : Health and Radioactive Materials Some questions will expect you to understand and / or discuss: ALARA Risks and Benefit Precautionary Principle Perceived risk and Actual risk You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
ks4_p3_revision aSGuest58850 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 23 Category: Entertainment License: All Rights Reserved Like it (0) Dislike it (0) Added: August 05, 2010 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Revision forP3: Radioactive Materials : Revision forP3: Radioactive Materials Thursday, 05 August 2010 Learning Objective: To review the key areas in preparation for the P3 Exam. Nuclear Radiation : Nuclear Radiation Comes from the nucleus Nucleus contains neutrons and protons Electrons orbit around the edge Nucleus Electrons Two isotopes of Carbon – both have 6 protons but different numbers of neutrons. 3 Types of Radiation : 3 Types of Radiation Alpha Very ionising Not very penetrating Absorbed by paper or dead skin cells Stopped by only a few centimetres of air Beta Slightly ionising Absorbed by aluminium or half a metre of air Gamma Not very ionising Very penetrating Absorbed by lead or thick concrete Efficiency : Efficiency Efficiency, as a percentage, is worked out by: The more efficient the object is the less energy is wasted or dissipated in an wasteful way Be able to interpret energy flow diagrams Background Radiation : Background Radiation The dose of radiation is measured in sieverts Sv, or millisieverts mSv. What happens when radiation hits a cell? : What happens when radiation hits a cell? Radiation passes straight through If it hits a sex cell it could cause a mutation by changing a gene Damaged – but repairs itself The DNA is damaged and the cell develops out of control – a cancer has begun It is killed Energy Resources : Energy Resources Primary Energy Source: A source of energy not made from any other sort of energy source e.g. fossil fuels and uranium Secondary Energy Source: A source of energy that can be distributed easily but has been manufactured using a primary energy source e.g. electricity Fossil Fuel Power Station : Fossil Fuel Power Station Be able to label a diagram like this Nuclear Power Station : Nuclear Power Station Know the differences between these 2 diagrams Fission : Fission Neutron Chain Reaction : Chain Reaction Uncontrolled – causes a nuclear bomb Controlled – used in a power station Half Life : Half Life The half life of a radioactive substance is the amount of time it takes for the activity (amount of radiation that is given out) to fall to half the previous value. 3 Types of Waste : 3 Types of Waste Low Level e.g. protective clothing and medical equipment Packed in drums and put in a special landfill site Intermediate Level Less dangerous that high level waste High Level E.g. spent/old fuel rods This gets hot as it is so radioactive, it’s kept in a pool of water to absorb the heat Health and Radioactive Materials : Health and Radioactive Materials Some questions will expect you to understand and / or discuss: ALARA Risks and Benefit Precautionary Principle Perceived risk and Actual risk