Analysis of LOFT containment nozzles 11A, 11B, 11D, 12A, 13B, 13C, and 13D by Bijlaard method (open access)

Analysis of LOFT containment nozzles 11A, 11B, 11D, 12A, 13B, 13C, and 13D by Bijlaard method

The purpose of this analysis was the calculation of stresses in the LOFT Containment Vessel at the point of nozzle penetration produced by loads on the nozzles and to show that those stresses are within the 1965 ASME Boiler and Pressure Vessel Code allowables. The stress determination was done by the method developed by P. P. Bijlaard on the worst load case for each diameter nozzle. The operating basis earthquake (OBE) at nozzle 11D produced the most severe load case. All load cases resulted in containment vessel stresses that were less than the allowables as stated in N-414 of the 1965 ASME Boiler and Pressure Vessel Code.
Date: July 24, 1978
Creator: McFadden, D.F.
Object Type: Report
System: The UNT Digital Library
Dislocation substructures in high-energy-rate-forged and press-formed 21-6-9 stainless steel (open access)

Dislocation substructures in high-energy-rate-forged and press-formed 21-6-9 stainless steel

A Transmission Electron Microscope (TEM) was used to establish that the substructure of press formed (PF) 21-6-9 stainless steel toroids was characterized by a dislocation cell size finer, about 0.16 ..mu..m, than that of about 0.29 ..mu..m, of high-energy-rate-formed (HERF) processed toroids. In addition, HERF processed material showed areas of a coarser, well-developed subgrain structure characteristic of hot work deformation. The formation of the substructures, as-well-as the grain size and carbide distributions of the toroids produced by the two processing techniques, are discussed in terms of the various operations, temperatures, and strain rates associated with the two different processing schedules. The Press-Formed toroid had a higher yield strength than the HERF processed toroid which was attributed to the finer cell size of the PF processed toroid.
Date: July 24, 1978
Creator: Sanderson, Elane C.; Brewer, Arvel W.; Krenzer, Robert W. & Krauss, George
Object Type: Report
System: The UNT Digital Library
PSMG sets A and B protective relaying (open access)

PSMG sets A and B protective relaying

The ''TAN/LOFT 13.8 kV, 2.4 kV, and 480 V Relay and Circuit Breaker Coordination Study'' presented an analysis to determine overcurrent settings for the LOFT Power System protective relays including those for the drive motors of the PSMG sets. This LTR is written to form the basis of the relay settings entered in Specification ES-60238 Rev. B, for protection of the PSMG generator, primary coolant pump motor and interconnecting power cable. A momentary commercial power voltage dip occurred on January 10, 1978 which caused a trip of the PSMG field breakers. A corrective design to prevent reoccurrence is discussed and recommendations are presented.
Date: July 24, 1978
Creator: Burnett, J.E.
Object Type: Report
System: The UNT Digital Library
Texas Attorney General Opinion: H-1214 (open access)

Texas Attorney General Opinion: H-1214

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, John L. Hill, regarding a legal question submitted for clarification; Distribution of funds to minor children by the Employees Retirement System.
Date: July 24, 1978
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History