nuclear engineering, assignment help

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srveyy

Engineering

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I have four questions to solve.

I uploaded these four questions.

And I will upload some lecture about these questions.(Due to upload files are limited, so accept this task, I will upload these a few lecture.)

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16-1 Section A Question 1 分泉 [ 123 a) The use of nuclear energy produced from splitting the atoms within the nuclear fuel is considered a very safe source of energy that can be adopted to generate electricity. Although three very severe nuclear accidents have occurred the use of nuclear energy is still considered safe particularly when compared with alternative sources of energy. Describe the advantages and disadvantages of the use of nuclear energy to generate electricity. [6 marks] b) What kind of reactor is shown in the figure below? Where is it used? What are the main characteristics of this type of reactor? How is the power of the reactor controlled? [6 marks] Il Control rods Concrete pressure vessel funn Steam generator 금 Fuel elements Graphite moderator c) Consider a radioactive sample with initially 1000 atoms. How many half-lives have elapsed when 750 atoms have decayed? Describe the law of radioactive decay. A) 0.25; B) 0.41; C) 0.50; D) 0.75; E) 1.3; F) 2.0; G) 2.4; H) 4.0 [6 marks] d) What are the 3 main civil nuclear accidents occurred worldwide? State the date, location, type of reactor and corresponding INRES level of the accidents. [6 marks] e) Define the following units of radiation and radioactivity: Becquerel, Gray, Sievert. What are the legal exposure limit for population and the natural background in UK? [6 marks] Section B Question 2 Complete the following nuclear fission pathway, for each step calculate the expected energy released, and give a total expected energy release for the entire process? Use the datasheet/periodic table provided, report answers to 2decimal places, and complete the diagram in your answer book. [20 marks] + 'n 38U+ 'n. 4.81 MeV 3'n 102Nb 1B Question 3 a) What are they key requirements for a nuclear waste form? (8 marks] b) What are the challenges facing nuclear waste in long term storage, give an example of each? [6 marks) c) What options are available for minimising nuclear waste levels? [6 marks] Question 4 a) Describe the role displacement and and incident energies have on the level of induced damage in a radiation damage event. [4 marks] b) Schematically describe the kinchin-Pease model for damage and note the assumptions made. Include a diagram describing the Kinchin-Pease model. [6 marks] c) What are the required parameters when applying Kinchin-Pease? [3 marks) d) Describe the key bulk effects arising from radiation damage. [6 marks] Question 5 a) What are the chemical components of a molten salt reactor, indicate in your answer any assumptions you have made [6 marks] b) In a molten salt reactor what are the key challenges that need to be overcome? What are the material requirements and how do they impact the design of the core? Give examples in your answer [10 marks) c) Describe a Li-based tritium breeding process, showing a balanced equation, and the energy released by the process calculated. [4 marks] Page 3 of 6
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