Student:

Student:	Test #1a
Date: 17 Oct 2001	Reactor materials, reactor types, thermal-hydraulics fundamentals

Scope:	• Explain the parameters important for good thermal reactor moderators, list the requirements for moderators, and list the possible moderators. [35 points] • List and explain the important design features of the PWR reactors and compare them to the CANDU reactor. [30 points] • Explain the thermal-hydraulic operation of the steam generator using the figure showing change of fluid temperature on the primary and secondary side with reactor power (use a simple macro thermal balance to support the explanation) [35 points]

Student:	Test #1b
Date: 17 Oct 2001	Reactor materials, reactor types, thermal-hydraulics fundamentals

Scope:	• List and explain the requirements for reactor primary coolants, and list and explain the advantages and disadvantages of various possible reactor coolants. [30 points] • List and explain the important features of the gas-cooled reactors, and explain the most important design features of the most important types of gas-cooled reactors. [35 points] • Explain the thermal-hydraulic operation of the primary heat transport pumps, list the most important modes of operation, and explain the pump curves (use a simple pressure drop balance equation to support the explanation) [35 points]

Student:	Test #1c
Date: 17 Oct 2001 New date	Reactor materials, reactor types, thermal-hydraulics fundamentals

Scope:	• List and explain the requirements for reactor fuel materials, and list and explain the advantages and disadvantages of various possible reactor fuels. [30 points] • List and explain the important features of the BWR reactors, and explain the most important design features. [35 points] • Explain the thermal-hydraulic calculations performed for the reactor core; explain the thermal-hydraulics features of the core, and most important modes of operation. [35 points]

Student:	Test #2a
Date: 15 Nov 2001	Thermodynamics, fuel-coolant heat transfer, CHF

Scope:	• List and explain possible ways of increasing reactor thermal efficiency, discuss the feasibility of each design change, and comment on the incremental gain in thermal efficiency for each improvement keeping in mind the features of the CANDU design. [35 points] • Draft a diagram of variation of coolant temperature, sheath temperature, fuel centreline temperature, heat flux, and CHF in a horizontal CANDU channel in axial direction. Discuss the temperature parametric trends, and location of maximum temperatures [30 points] • List and explain important effects that impact on CHF in a CANDU fuel channel. Discuss design features that can improve the CHF margin. [35 points]

Student:	Test #2b
Date: 15 Nov 2001	Thermodynamics, fuel-coolant heat transfer, CHF

Scope:	• Prepare p-v, T-S, and I-S diagrams for reactor systems with several open feed-water heaters, several closed feed-water heaters, and one moisture separator unit, and discuss most important design features [35 points] • Draw a diagram of temperature variation in radial direction of a fuel element. List and explain the impact of various parameters on the temperature distribution in radial direction across the fuel, radial gap, sheath and coolant. [30 points] • List and explain the most important methods for calculation of CHF in various geometries. Explain why is the calculation of CHF required. Draw conceptual diagrams that show the effect of important parameters on CHF. [35 points]

Student:	Test #3a
Date: 5 Dec 2001	Pressure drop calculations. The Design Process

Scope:	• List the factors and parameters that have significant importance on pressure drop calculations (pipe flow configuration) [35 points] • Draw a diagram of pressure drop trend in a pipe with sudden contraction following by a sudden expansion, and explain the behaviour of the three components of the pressure drop. Show example of pressure drop expression and identify importance of pressure drop correlation [35 points] • As part of the design process, list and explain interaction between various groups involved, and list and explain main document types used to communicate information during the design process [30 points]

Student:	Test #3b
Date: 5 Dec 2001	Pressure drop calculations. The Design Process.

Scope:	• List and explain the locations in the CANDU primary heat transport system where local pressure drop is important. Comment on the difference between CANDU and PWR local pressure drop [35 points] • Explain the significance of the pressure drop on the channel flow stability in boiling flow situation. Use diagrams of single channel and two-channel press. drop vs. flow rate to explain the phenomena [35 points] • List the main elements of the design process, and show relationship in a diagram (methods, design and development elements). Identify the ground rules for design and explain optimization process [30 points]