Homework Set 2 Solutions - Homework 15 Solutions Due Monday...

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Homework 15 Solutions Due: Monday 3/1 A Stirling cycle engine using a radioactive isotope for space power applications operates at a hot end temperature of 650 ° C and rejects heat through a radiator to the vacuum of space with a cold end temperature at 120 ° C. Calculate its ideal Stirling cycle efficiency. Ideal Sterling cycle efficiencies can be estimated by Carnot cycle efficiencies. η Sterling = Carnot = 1 T r T a = 1 120 + 273 ( ) 650 + 273 ( ) = 57.42%
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Homework 16 Solutions Due: Wednesday 3/3 Construct a table comparing the PWR and the BWR designs in terms of: 1. Their Engineered Safety features. ESFs. 2. Their technical specification and operational characteristics. Engineered Safety Features Pressurized Water Reactor Boiling Water Reactor 1. Control rods 1. Control rods 2. Containment vessel with steam suppression spray 2. Containment vessel with steam suppression spray 3. Accumulator tanks with coolant under nitrogen pressure 3. Pressure suppression pool to quench steam 4. Residual heat removal system 4. Residual heat removal system 5. High Pressure Coolant Injection system 5. High Pressure Coolant Injection system 6. Low Pressure Coolant Injection system 6. Low Pressure Coolant Injection system 7. Boron injection tank 7. Boron injection tank 8. Extra coolant in refueling storage tank 8. Extra coolant in refueling storage tank 9. An internal core spray system The technical specifications for PWRs are given in Table 1 on page 6 of Chapter IV.2 Pressurized Water Reactors. The same characteristics for a BWR are given in Table 1 on page 6 of Chapter IV.3 Boiling Water Reactors.
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Homework 17 Solutions Due: Wednesday 3/10 An executive at an electrical utility company needs to order natural uranium fuel from a mine. The utility operates a single 1,000 MWe power plant of the CANDU type using natural uranium, and operating at an overall thermal efficiency of 33.33 percent. What is the yearly amount in metric tons of: a. U 235 burned up by the reactor? b. U 235 consumed by the reactor? c. Natural uranium metal that the executive has to contract with the mine per year as feed to his nuclear unit? Since the burnup and consumption rate equations deal with thermal power, we need to convert the power output of the reactor using the given thermal efficiency P th = P e η th = 1000 MWe .3333 MWe MWth = 3000.3 MWth a. Annual burnup rate: BR = 1.112 1 MWth ( ) P
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This note was uploaded on 08/25/2010 for the course NPRE 402 taught by Professor Ragheb,m during the Spring '08 term at University of Illinois, Urbana Champaign.

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Homework Set 2 Solutions - Homework 15 Solutions Due Monday...

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