A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.

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; Limitation on business activities of barber inspectors and on members of the Board of Barber Examiners.

A retrofit solar water-heating system has been installed in a three-story apartment building at Drexel University. The system employs two conventional collector banks (10 PPG collectors) mounted at the latitude angle for Philadelphia of 40 deg from the horizontal and two double-exposure collectors (DEC's) mounted vertically in mirrored enclosures. Although the DEC units are being used for year-round domestic water heating for the building, they are designed to provide maximum output in the winter and are therefore well-suited to solar space heat applications. Instrumentation for testing the DEC units has been developed and installed in the apartment building. The temperature sensors have been calibrated and regular data collection has begun. Some of the performance data acquired in June and July is presented and analyzed. The performance of the DEC units has been excellent during these summer months. A computer program has been developed for performance calculations for a variety of mirror configurations and latitude locations. Some preliminary results are presentd for latitudes 35, 40 and 45 deg.

The technical progress reported is divided into seven task areas. They are as follows: (1) thermal disproportionation of Si/sub x/F/sub y/ homologues on Si packed beds. Effort has been directed toward the study of the thermal disproportionation of Si/sub x/F/sub y/ homologues on Si packed beds at 850/sup 0/C and 500/sup 0/C. (2) review of experimental results on the near-continuous reactor. The silicon transport data from forty runs conducted on the near-continuous reactor are summarized and discussed. (3) thermal analysis of (SiF/sub 2/)/sub x/ polymer. At 276 to 286/sup 0/C a strong exothermic transition occurs in the (SiF/sub 2/)/sub x/ polymer. The enthalpy (..delta..H) measured by D.S.C. was -44.37 cal/gm. Other smaller endotherms were observed at 96/sup 0/C and 363/sup 0/C. (4) motorola purification therodynamics. In the Appendix can be found thermodynamic calculations for the predicted SiF/sub 4/ to SiF/sub 2/ conversion efficiencies for Step I in the SiF/sub 4/ transport purification process. (5) polymer condensation. It was concluded from the polymer condensation experiments at 0/sup 0/C that substrates and higher pressures in the polymer condensation unit increase condensation efficiency. However, the higher pressure occurring in these experiments markedly reduced the Step I reaction efficiency. (6) crystal growth. Single crystal …

The laboratory cyclone incinerator has been developed to study the effects of burning feed containing radionuclides other than plutonium-238. These isotopes, which will be primarily products of fission, must be efficiently removed from the off-gas if combustible waste containing such species is to be incinerated. Modifications to the original incinerator design were made to increase the efficiency of combustion and particulate removal in the system and to reduce its energy consumption. A drum compactor was purchased, installed, and tested. The test results were as expected; a 55-gal steel drum volume was reduced by 86%. The ash/cement matrix studies were completed. The 65/35 mixture proved to be the best for dry-cure pellets, and the 80/20 mixture produced the best wet-cured pellets. Experimental incinerator ash was successfully sintered; the final carbon content was less than 0.1 wt%.

A thermal analysis of a deep geologic depository for spent nuclear fuel is being conducted. The TRUMP finite difference heat transfer code is used to analyze a 3-dimensional model of the depository. The model uses a unit cell consisting of one spent fuel canister buried in salt beneath a ventilated room in the depository. A base case was studied along with several parametric variations. It is concluded that this method is appropriate for analyzing the thermal response of the system, and that the most important parameter in determining the maximum temperatures is the canister heat generation rate. The effects of room ventilation and different depository media are secondary.