Semiweekly newspaper from Allen, Texas that includes local, state, and national news along with advertising.

Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.

Weekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.

Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.

Weekly newspaper from The Colony, Texas that includes local, state, and national news along with advertising.

Weekly newspaper from Drumright, Oklahoma that includes local, state, and national news along with advertising.

Weekly newspaper from Dublin, Texas that includes local, state, and national news along with advertising.

Weekly newspaper from San Diego, Texas that includes local, state, and national news along with advertising.

All of the controls on high-efficiency particulate air (HEPA) filters are based on rigid manufacturing standards with regard to filtration efficiency, temperature performance, pressure integrity, and strength. Third-party inspection and testing by the US Department of Energy increases the reliability of new HEPA filters, but only routine in-place testing is used to assure that an aging filter performs adequately. In 1980 the Lawrence Livermore National Laboratory initiated a small evaluation to determine if age has a significant effect on the structural integrity of HEPA filters. A series of used uncontaminated filters dating back to 1965 was obtained for these tests. Tensile strength tests on the old media indicated a decrease in strength. To provide additional measurement of the filters' overall strength, several of these aged filters were subjected to pressure pulses equivalent to the NRC Region I tornado pulses and shock wave overpressures. Data from these tests indicate a decrease in breaking pressure of from 25/endash/50%. A large increase in complete filter pack blow-out during the simulated NRC Region I tornado tests was also observed. The preliminary results indicate the need for an administrative lifetime for HEPA filters used in critical nuclear facilities. Due to the unique conditions in each …

Daily newspaper from Gainesville, Texas that includes local, state, and national news along with advertising.

Semiweekly newspaper from Levelland, Texas that includes local, state, and national news along with advertising.

Photograph of the M.H. Cross Building in Brownsville, Texas.

Photograph of a man with a video camera recording the model of a building which is placed on a table. A small TV and other office equipment are seen around the office.

Weekly newspaper from Mannford, Oklahoma that includes local, state, and national news along with advertising.

Weekly newspaper from Mannford and Drumright, Oklahoma that includes local, state, and national news along with advertising.

We have developed a new test procedure for evaluating filter penetrations as low as 10/sup /minus/9/ at 0.1-..mu..m particle diameter. In comparison, the present US nuclear filter certification test has a lower penetration limit of 10/sup /minus/5/. Our new test procedure is unique not only in its much higher sensitivity, but also in avoiding the undesirable effect of clogging the filter. Our new test procedure consists of a two-step process: (1) We challenge the test filter with a very high concentration of heterodisperse aerosol for a short time while passing all or a significant portion of the filtered exhaust into an inflatable bag; (2) We then measure the aerosol concentration in the bag using a new laser particle counter sensitive to 0.07-..mu..m diameter. The ratio of particle concentration in the bag to the concentration challenging the filter gives the filter penetration as a function of particle diameter. The bad functions as a particle accumulator for subsequent analysis to minimize the filter exposure time. We have studied the particle losses in the bag over time and find that they are negligible when the measurements are taken within one hour. We also compared filter penetration measurements taken in the conventional direct-sampling method …

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, covering a news story about a Dallas Police Department incident report, including a brief interview and still photos of the incident report document. This story aired at 10pm.

B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This story aired at 5pm.

B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This story aired at 10pm.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This story aired at 6pm.

Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.

Weekly newspaper from Palacios, Texas that includes local, state, and national news along with advertising.

Daily newspaper from Pawhuska, Oklahoma that includes local, state, and national news along with advertising.