Type of Document	Dissertation
Author	Herr, John D.
URN	etd-05112006-154745
Title	Determining the moderator temperature coefficient in a PWR
Degree	PhD
Department	Mechanical Engineering
Advisory Committee	Advisor Name Title Thomas, James R. Jr. Committee Chair Mitchell, Larry D. Committee Member Parkinson, Thomas F. Committee Member VanLandingham, Hugh F. Committee Member Wicks, Alfred L. Committee Member
Keywords	Pressurized water reactors Thermodynamics Pressurized water reactors Research
Date of Defense	1990-05-05
Availability	restricted
Abstract An on-line, passive method for monitoring the moderator temperature coefficient (MTC) in a pressurized water reactor is described and compared to an analytical model. The method correlates fluctuations in the neutron flux with fluctuations in the coolant temperature. Results show that the frequency response function between the in-core neutron flux and thermocouple signals is proportional to the MTC and can be used to monitor changes in the MTC throughout the fuel cycle. An analytical model is also formulated and used to investigate how the neutron flux and coolant temperature fluctuations are related and change in the axial core direction. The analytical model results agree reasonably well with the experimental results.
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