Abstract: A system for simultaneously testing at least two any control rod clusters contained within a reactor vessel, the system comprising a control rod drive mechanism attached to the control rod clusters for retracting the control rod clusters within said reactor vessel to a position suitable for testing. Electrical power means connected to the control rod drive mechanism for supplying electrical power to the control rod drive mechanism and for terminating the power to the control rod drive mechanism and, when terminated, causing said all said control rod clusters to fall into the reactor vessel. A rod position indicator attached to the control rod drive mechanism for monitoring the position of the control rod clusters; and computing means operatively connected to the rod position indicator and receiving a signal representing the fall time of each control rod cluster for generating an elapsed time profile of all the control rod clusters.

Abstract: An excore neutron flux power level detector assembly includes a neutron flux detector subassembly and a moderator subassembly having the form of a dual-wall canister of annular cross-section for receiving the detector subassembly in coaxial and telescoping relationship therein and having moderator material, preferably high density polyethylene, in the annular space between the dual-walls thereof for converting epithermal neutrons in leakage flux from a nuclear reactor to thermal neutrons having a power level detectable by the flux detector subassembly. Insulating spacer elements affixed concentrically about and axially displaced along the surface of the cylindrical housing of the detector provide lateral, structural support and spacing therebetween and electrical insulation of the detector subassembly from the moderator subassembly.

Abstract: Triaxial connector adapters for connecting triaxial cables. Triaxial connector adapters provided in accordance with the present invention allow connection of triaxial cables having different bend radii, thereby ensuring that monitoring instruments in, for example, the nuclear power industry, can be sealed in accordance with federal regulations. Furthermore, triaxial connector adapters disclosed herein provide quick, efficient and safe retrofitting of existing monitoring instruments which use standard large bend radius triaxial cables.