Title page for ETD etd-05112006-154745


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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