Westinghouse Electric Corporation

Westinghouse Electric Company LLC

Stanwood L Anderson

Thomas V Congedo

Michael D Heibel

John Bartko

Arnold H Fero

Francis H Ruddy

Abdul R Dulloo

Patrick J Sebastiani

Francis H Ruddgy

A method of determining the spatially corrected inverse count ratio (SCICR) used to determine reactor criticality, which subtracts a background noise signal from the source range detector output. The method monitors the source range detector signal at two different core temperature levels during a transient portion of the detector output as the power output of the reactor is increased in the source range. This information is employed to analytically determine the background noise signal, which is then subtracted from the detector outputs to obtain the SCICR reactivity measurement.

Subcritical reactivity measurement method

Prompt Gamma Neuteon Activation Analysis (PGNAA) is employed to determined in situ the content of nickel, copper, or other embrittlement-enhancing elements within the weld metal joints of nuclear reactor pressure vessels.

PGNAA system for non-invasively inspecting RPV weld metal in situ, to

A method and apparatus for measuring a neutron flux in which the neutrons induce fission reactions in the layer of fissile material, the fission reactions in turn inducing light pulses in a scintillator material. A photomultiplier tube detects the light pulses and emits an electrical pulse in response. The electrical pulses are summed, checked for coincidence, stored, and otherwise manipulated in order to detect and measure neutron flux. In one advantageous embodiment of the invention, several different fissile materials or coated and uncoated fissile materials are used in order to obtain a spectral distribution of the incident neutron flux. At another embodiment, opposed detectors are used in order to discriminate between actual neutron-induced fission events and background events.

Method and apparatus for neutron dosimetry

Growing community of inventors

Pittsburgh, PA, United States of America

Stanwood L Anderson