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Eddy covariance mapping and quantification of surface CO2 leakage fluxes

Description: We present eddy covariance measurements of net CO{sub 2} flux (F{sub c}) made during a controlled release of CO{sub 2} (0.3 t d{sup -1} from 9 July to 7 August 2008) from a horizontal well {approx}100 m in length and {approx}2.5 m in depth located in an agricultural field in Bozeman, MT. We isolated fluxes arising from the release (F{sub cr}) by subtracting fluxes corresponding to a model for net ecosystem exchange from F{sub c}. A least-squares inversion of 611 F{sub cr} and corresponding modeled footprint functions recovered the location, length, and magnitude of the surface CO{sub 2} flux leakage signal, although high wavenumber details of the signal were poorly resolved. The estimated total surface CO{sub 2} leakage rate (0.32 t d{sup ?1}) was within 7% of the release rate.
Date: August 1, 2009
Creator: Lewicki, J.L. & Hilley, G.E.
Partner: UNT Libraries Government Documents Department

Remote Plastic Bag Passout Unit for High-Level Radiochemical Operations

Description: A system is designed for making remote sealed-bag passouts from a multicurie-level chemistry processing enclosure. The polyethylene bags are changed remotely without exposing contaminated surfaces while always maintaining a low leak rate seal. The system employs an interchange box (passout box) attached to the chemistry enclosure. Integrated with the box is a hydraulically operated jack that raises and lowers the bags, and a welder-cutter for sealing them. A single master-slave manipulator teamed with the above units handles all operations. (auth)
Date: August 1, 1961
Creator: Fleischer, E. S.; Parsons, T. C. & Howe, P. W.
Partner: UNT Libraries Government Documents Department

Review of the Unauthorized Disclosures of Former National Security Agency Contractor Edward Snowden

Description: Declassified and heavily redacted intelligence report. From Executive Summary: "In June 2013, former National Security Agency (NSA) contractor Edward Snowden perpetrated the largest and most damaging public release of classified information in U.S. intelligence history. In August 2014, the Chairman and Ranking Member of the House Permanent Select Committee on Intelligence (HPSCI) directed Committee staff to carry out a comprehensive review of the unauthorized disclosures. The aim of the review was to allow the Committee to explain to other Members of Congress--and, where possible, the American people--how this breach occurred, what the U.S> Government knows about the man who committed it, and whether the security shortfalls it highlighted had been remedied."
Date: September 15, 2016
Creator: United States. Congress. House. Permanent Select Committee on Intelligence
Partner: UNT Libraries Government Documents Department

Dry Bearing Endurance Test for the Service Machine: Experimental Gas-Cooled Reactor

Description: The concept of operating bearings and gears unlubricated in a helium environment was questioned as to fundamental soundness. Tests were made to determine if immediate gross failure occurs. A bearing of standard manufacture was operated in helium for 42 hr. A high degree of gradual wear was encountered. No gross or sudden failures were found. (W.L.H.)
Date: September 29, 1960
Creator: Flippen, B. H.
Partner: UNT Libraries Government Documents Department

PERIODIC REACTOR PLANT LEAK RATE TEST. CORE I, SEED 2. Test Results T- 641102

Description: An investigation was conducted to determine the magnitude of reactcr coolant leakage through the reactcr relief valve and the pressurizer relief valves. The pressurizer relief valve leak rate was not significantly different from that found in the previous performance test. The rate in the reactor relief valve decreased considerably. (J.R.D.)
Date: January 20, 1961
Partner: UNT Libraries Government Documents Department

Automated leak test systems

Description: An automated leak test system for tritium shipping containers has been developed at Westinghouse Savannah River Co. (WSRC). The leak detection system employs a computer controlled helium detector which allows an operator to enter key information when prompted. The software for controlling the tests and the equipment apparatus were both designed and manufactured at the Savannah River Technology Center within WSRC. Recertification Test: Every twelve months, the pressure vessel portion of the shipping container itself must undergo a rigorous recertification leak test. After an empty pressure vessel (shipping container) is assembled, it is placed into one of six stainless steel belljars for helium leak testing. The belljars are fashioned in row much the same as assembly line arrangement. Post-load Test: A post-load leak test is performed upon reservoirs that have been filled with tritium and placed inside the shipping containers mentioned above. These leak tests are performed by a rate-of-rise method where the area around the shipping container seals is evacuated, valved off from the vacuum pump, and then the vacuum pressure is monitored over a two-minute period. The Post Load Leak Test is a quality verification test to ensure that the shipping container has been correctly assembled. 2 figs.
Date: September 15, 1997
Creator: Cordaro, J.V.; Thompson, W.D. & Reeves, G.
Partner: UNT Libraries Government Documents Department

NaK FREE CONVECTION COOLED SHAFT FREEZE SEAL FOR SRE PUMPS

Description: An investigation was conducted to determine the feasibility of using an NaK free-convection-cooled shaft freeze seal on the SRE main sodium pumps. The use of sodium in this application instead of tetralin eliminates the carburization hazard present should the seal coolant-(tetralin) leak into the sodium system. Results and recommendations are included. (J.R.D.)
Date: June 18, 1959
Creator: Perez, F.
Partner: UNT Libraries Government Documents Department

LEAKAGE CHARACTERISTICS OF OPENINGS FOR REACTOR HOUSING COMPONENTS

Description: Measurements were made of the air leakage rates through structural components that penetrate semicontainment reactor housing installations. Full- sized test specimens were sealed inside a 10-ft-diameter test sphere, and the leakage rate was measured as a function of pressure for pressure differentials of up to 25 in. of water. The data were fitted to empirical equations that describe the leak rate at any pressure differential within the range of the experimental tests. The forms of the equations are such that the total leak rate of a building can be obtained by summing the empirical constants and multiplying by a probable pressure differential. (auth)
Date: June 20, 1960
Creator: Baurmash, L.; Burnett, F.C.; Koontz, R.L. & Nelson, C.T.
Partner: UNT Libraries Government Documents Department

MONITORING THE COOLING AIR EFFLUENT FROM THE BROOKHAVEN GRAPHITE RESEARCH REACTOR AT THE POINT OF RELEASE AND IN THE ENVIRONMENT

Description: The facilities for monitoring the particulate activity, Ar/sup 41/, and I/sup 131/ in the air effluent and the BGRR are described. The performance of the facilities under emergency conditions is studied for the release incident of Sept. 10 to 13, 1962; it is seen that the I/sup 131/ release, but not the particulate activity release, provided warning. (D.L.C.)
Date: January 1, 1963
Creator: Foelix, C.F. & Hull, A.P.
Partner: UNT Libraries Government Documents Department

REPROCESSING OF ARE FUEL, VOLATILITY PILOT PLANT RUNS E-1 AND E-2

Description: After two batches ( approximately 340 kg) of fluoride salt from the ARE were reprocessed, a pilot plant operations were terminated because of a leak through which an estimated 780 g of uranium (as UF/sub 6/ escaped. Of the 21 kg of highly enriched uranium in the feed, 93.12% was collected as UF/sub 6/ product, 0.13% represented measured losses, and 3.72% was unaccounted for (leak). An additional 3.03% was reclaimed from NaF beds and equipment washes. The produce met both chemical purity and activity specifications for product level UF/ sub 6/. Decontamination from fission products was essentially complete. A gross gamma decontamination factor was apparently limited by the low activity of the feed salt. (auth)
Date: May 11, 1959
Creator: Whitmarsh, C.L.
Partner: UNT Libraries Government Documents Department

SUPPLEMENTARY REPORT NO. 1 ON VACUUM SYSTEMS

Description: An investigation of various vacuum problems such as erroneous ionization ages effect of dome size on measured pump speed, effect of leak beaming on measured pumping speed, and effects of fractionation on ultimate pressure, is presented. (W.J.H.)
Date: January 1, 1960
Creator: Normand, C.E.
Partner: UNT Libraries Government Documents Department

LEAKAGE OF WATER FROM GASKETED JOINTS PROPOSED FOR THE HWCTR. PART I

Description: When mockups of typical gasketed joints proposed for the HWCTR were subjected to thermal and pressure cycling that simulated reactor operating conditions, the average leakage rate was less than 0.11 lb of water per year per linear inch of gasket. The joints were exposed to deionized light water and were cycled 100 times from about 70 deg C and atmospheric pressure to 250 deg C and 1000 psig. (auth)
Date: July 1, 1960
Creator: Apple, F.C.
Partner: UNT Libraries Government Documents Department