Advances in automated noise data acquisition and noise source modeling for power reactors

Abstract

A newly-expanded program, directed toward achieving a better appreciation of both the strengths and limitations of on-line, noise-based, long-term surveillance programs for nuclear reactors, is described. Initial results in the complementary experimental (acquisition and automated screening of noise signatures) and theoretical (stochastic modeling of likely noise sources) areas cf investigation are given.

Contribution of fuel vibrations to ex-core neutron noise during the first and second fuel cycles of the sequoyah-1 pressurized water reactor

“…One-and two-dimensional, 3-neutron energy group, neutron kinetic models were developed to determine the spatial sensitivity of ex-core neutron detectors to fuel assembly vibrations (Clapp and colleagues, 1982;Sweeney and Renier, 1982). These calculations were extended to account for fuel composition and soluble boron concentration changes occurring over a fuel cycle (Sweeney and Renier, 1983;1981).…”