Abstract: An apparatus to measure and display the pressures developed on the surfaces of a boat sail. This apparatus uses an electronic module that attaches to the sail to measure and calculate the surface pressures or differential pressure and transmit this data via wireless link to a separate display unit. The display unit provides a visual display of the measured pressures and a peak indication of the maximum or minimum pressures measured.

Abstract: An apparatus for the safe and compact storage of nuclear fuel assemblies in an array of discrete open-ended neutron absorbing shields for which the theoretical minimum safe separation distance and cell pitch are known. Open-ended stainless steel end fittings are welded to each end of each shield and the end fittings are welded to each other in side-by-side relation, thereby reducing the cell pitch tolerance due to fabrication uncertainties. In addition, a multiplicity of ridges on the sides of each shield having a height equal to one half the theoretical minimum safe separation distance further reduce shield bowing tolerances. The net tolerance reduction permits a significant increase in the number of fuel assemblies that can be safely contained in a storage area of fixed size.

Abstract: A fluid driven actuator for a neutron absorber in a nuclear reactor is of the piston and cylinder type. The actuator is located above the reactor core. Means are provided for alternately opening and closing a by-pass fluid flow path or passage through or across the piston within the cylinder. The flow path is closed when the piston and control rod is being raised and is subsequently opened to reduce flow resistance during insertion or scram. In the preferred embodiment, the piston is longitudinally movable relative to the piston or extension rod which connects with the neutron absorber. In one position of the piston, the by-pass path is open and in another position, it it closed.