The objective of the production test described in this report is to authorize the irradiation of aluminum-clad fuel elements with U{sup 235}-Al cores for corrosion testing in the 1706-KE Facility; the irradiation of thermocouple elements to measure the temperature of the aluminum cladding, installation of modified rear nozzles on the tubes in which these tests will be conducted., and the use of two regular KE tubes as controls. In order to measure corrosion at higher heat flux and surface temperature than are ordinarily available, corrosion measurement will be made using enriched aluminum-clad fuel elements with ``C`` and ``J`` (U{sup 235} in Al) cores. One fuel element per charge will be provided with thermocouples inserted in the cladding to measure its temperature. These tests will be conducted in the ribless zirconium single-pass tubes in KE Reactor which can be supplied with water from 1706-KE. These fuel elements will have special end supports to avoid disturbances with flaw and heat transfer on the lateral surface. Modified rear nozzles, of the type designed for use with K zirconium tubes, will be installed to permit smooth discharge of elements with these supports.

Declassified 27 Nov 1973. The cold critical experiments with the Tory II-C reactor were performed in the critical facility of the Lawrence Radiation Laboratory at Livermore. The reactor is described briefly; the experimental equipment and the arrangement for the experiments is described in detail. The core poison was removed without difficulty, and criticality was achieved at 1624 hours July 14, 1965. With the design core configuration the shutdown margin was less than had been intended; criticality was attained at a shim rod bank position of 38.5 inches insertion rather than the expected 35 inches All Hastelloy tie tubes were replaced by Rene'-41. A heated core experiment with DELTA T = 129 plus or minus 7 deg F above room temperature provided a measure of the temperature coefficient which was found to be --3.9 x 10/sup -3/ plus or minus 7% inch of shim rod bank travel/ deg F. Other experiments included flux mapping, using fission foils, fission counters and copper flux wires, transients to determine control element worths, studies of flux spectrum by means of threshold detectors, and measurements of multiplication for various shutdown configurations for purposes of operational safety. Transient measurements, critical rod configurations, and flux distributions were also …

Research progress on pair production, photoproduction, beta scattering by protons and deuterons, meson ( pi ) production, shielding, polarized photon production, and photonproton scattering is reported. Developments of experimental equipment and facilities are also summarized, together with accelerator improvements and operation. (D.C.W.)