Limitations in determining the moderator temperature coefficient sign using noise analysis
- Arizona State Univ., Tempe (United States)
Previous researchers have established that the value of the moderator temperature coefficient (MTC) of reactivity is contained in correlations between fluctuations of the neutron flux and core-exit coolant temperature. This study has determined that a limitation exists on the range of MTC values for which the phase angle from noise analysis can be used to determine the MTC sign. Both the root-mean-square method and frequency response function technique are used to determine the absolute magnitude of the MTC. Thus, they are used in conjunction with the phase angle method, which states that cross-power spectral density (CPSD) phase angle between in-core neutron flux and core-exit temperature near zero frequency approaches [minus]180 deg for negative MTCs and 0 deg for positive MTC.
- OSTI ID:
- 6983135
- Report Number(s):
- CONF-921102-; CODEN: TANSAO
- Journal Information:
- Transactions of the American Nuclear Society; (United States), Vol. 66; Conference: Joint American Nuclear Society (ANS)/European Nuclear Society (ENS) international meeting on fifty years of controlled nuclear chain reaction: past, present, and future, Chicago, IL (United States), 15-20 Nov 1992; ISSN 0003-018X
- Country of Publication:
- United States
- Language:
- English
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