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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

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

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

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

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

Removal of mixing pump in tank 102-AP -- pump drop onto central pit

Description: The mixing pump, if dropped in the pump pit following its removal from the tank, is incapable of compromising the tank structure either locally or in a structural displacement mode to an extent which might allow dispersion of the contents. A drop from 10 ft above the pit floor (considered the maximum credible height) of a pump which is considered perfectly rigid does not approach the required perforation velocity. The velocity required to perforate requires a drop height which is physically impossible to attain with existing cranes. An analysis of the location of the deposition of the strain energy required to match the pump`s impact kinetic energy, the results of which are shown in Table 2, verifies that there is no credible chance for compromise of the tank roof by such a drop.
Date: June 20, 1995
Creator: Jimenez, R. F.
Partner: UNT Libraries Government Documents Department

Development of convective testing methods for low-rise multifamily buildings. Final report

Description: This report describes convective testing methods and protocols developed for use in weatherizing low-rise multifamily buildings. The methods can lead to controlling internal air movement and preventing leakage to the exterior by estimating magnitudes of air leakage pathways in garden and town house apartments. The 4 methods cited are: After-a-Retrofit; Equivalent Interfaces; Open-a-Door; and Add-a-Pathway. It is found that, because of modern interior finishing practices, convective problems tend to be more associated with indoor air quality than loss of space conditioning energy. The After-a-Retrofit method is the easiest to integrate into current diagnostic practices. In some cases, the Equivalent Interfaces method may be used on a production basis. The methods are an advance on current field practices that do not quantify the leakage pathways and research practices that require extensive equipment.
Date: August 1, 1996
Creator: Stiles, M.R.
Partner: UNT Libraries Government Documents Department

105K West Isolation Barrier Acceptance Test results

Description: The objective of this document is to report and interpret the findings of the isolation barrier acceptance tests performed in 105KW/100K. The tests were performed in accordance with the test plan and acceptance test procedure. The test report contains the test data. This document compares the test data against the criteria. A discussion of the leak rate analytical characterization describes how the flow characteristics flow rate will be determined using the test data from the test report. Two modes of water loss were considered; basin and/or discharge chute leakage, and evaporation. An initial test established baseline leakage data and instrumentation performance. Test 2 evaluated the sealing performance of the isolation barrier by inducing an 11 in. (27.9 cm) level differential across the barrier. The leak rate at this 11 in. (27.9 cm) level is extrapolated to the 16 ft. (4.9 m) level differential postulated in the DBE post seismic event. If the leak rate, adjusted for evaporation and basin leakage (determined from Test 1), is less than the SAR limit of 1,500 gph (5,680 lph) at a 16 ft (4.9 m) level differential, the barriers pass the acceptance test.
Date: May 18, 1995
Creator: McCracken, K.J. & Irwin, J.J.
Partner: UNT Libraries Government Documents Department

Preliminary evaluation of liquid integrity monitoring methods for gunite and associated tanks at the Oak Ridge National Laboratory, Oak Ridge, Tennessee

Description: The Gunite and Associated Tanks (GAAT) are inactive, liquid low-level waste (LLLW) tanks located in and around the North and South Tank Farms (NTF and STF) at Oak Ridge National Laboratory (ORNL). These tanks, which contain a supernatant over a layer of radioactive sludge, are the subject of an ongoing treatability study that will determine the best way to remove the sludge and remediate the tanks. As part of this study, a preliminary assessment of liquid integrity (or ``tightness``) monitoring methods for the Gunite tanks has been conducted. Both an external and an internal liquid integrity monitoring method were evaluated, and a preliminary assessment of the liquid integrity of eight Gunite tanks was made with the internal method. The work presented in this report shows that six of the eight GAAT considered here are liquid tight and that, in the case of the other two, data quality was too poor to allow a conclusive decision. The analysis indicates that when the release detection approach described in this report is used during the upcoming treatability study, it will function as a sensitive and robust integrity monitoring system. Integrity assessments based on both the internal and external methods can be used as a means of documenting the integrity of the tanks before the initiation of in-tank operations. Assessments based on the external method can be used during these operations as a means of providing a nearly immediate indication of a release, should one occur. The external method of release detection measures the electrical conductivity of the water found in the dry wells associated with each of the tanks. This method is based on the fact that the conductivity of the liquid in the GAAT is very high, while the conductivity of the groundwater in the dry wells and the underdrain system for ...
Date: February 1, 1996
Partner: UNT Libraries Government Documents Department

Refined radiological and toxicological consequences of boundingspray leak accidents in tank farm waste transfer pits

Description: Radiological and toxicological consequences of spray leak accidents in Hanford liquid waste tank farm pits were previously estimated and reported in WHC-SD- WM-CN-048 Rev 1, Calculation Notes in Support of TWRS FSAR Spray Leak Accident Analysis (Hall 1996a) in support of the Tank Waste Remediation System (TWRS) Final Safety Analysis Report (FSAR). The present document contains revised analyses incorporating more realistic assumptions and accident models than the previous document. In addition, several refinements in the analysis models suggested during the review of WHC-SD-CN-048 were investigated. Refinements which proved to have a significant effect on the results were included in the present analysis.
Date: February 27, 1997
Creator: Himes, D.A.
Partner: UNT Libraries Government Documents Department

Calculation notes in support of TWRS FSAR spray leak accident analysis

Description: This document contains the detailed calculations that support the spray leak accident analysis in the Tank Waste Remediation System (TWRS) Final Safety Analysis Report (FSAR). The consequence analyses in this document form the basis for the selection of controls to mitigate or prevent spray leaks throughout TWRS. Pressurized spray leaks can occur due to a breach in containment barriers along transfer routes, during waste transfers. Spray leaks are of particular safety concern because, depending on leak dimensions, and waste pressure, they can be relatively efficient generators of dispersible sized aerosols that can transport downwind to onsite and offsite receptors. Waste is transferred between storage tanks and between processing facilities and storage tanks in TWRS through a system of buried transfer lines. Pumps for transferring waste and jumpers and valves for rerouting waste are located inside below grade pits and structures that are normally covered. Pressurized spray leaks can emanate to the atmosphere due to breaches in waste transfer associated equipment inside these structures should the structures be uncovered at the time of the leak. Pressurized spray leaks can develop through holes or cracks in transfer piping, valve bodies or pump casings caused by such mechanisms as corrosion, erosion, thermal stress, or water hammer. Leaks through degraded valve packing, jumper gaskets, or pump seals can also result in pressurized spray releases. Mechanisms that can degrade seals, packing and gaskets include aging, radiation hardening, thermal stress, etc. An1782other common cause for spray leaks inside transfer enclosures are misaligned jumpers caused by human error. A spray leak inside a DST valve pit during a transfer of aging waste was selected as the bounding, representative accident for detailed analysis. Sections 2 through 5 below develop this representative accident using the DOE- STD-3009 format. Sections 2 describes the unmitigated and mitigated accident scenarios evaluated to ...
Date: September 25, 1996
Creator: Hall, B.W.
Partner: UNT Libraries Government Documents Department

Environmental standards for primary and secondary containment systems and transfer stations

Description: Environmental Standards for Primary and Secondary Containment Systems and Transfer Stations will supersede all previous requirements for design of dikes, storage tanks, and transfer stations in order to maintain consistency throughout the Y-12 Plant. This document is organized into six distinct sections, each with a specific purpose. Section I outlines the objectives of the document along with its applications and limitations; this section should be of interest to all readers for essential background information. Section II lists all definitions and is consistent with definitions outlined by environmental regulations. Section III discusses primary containment standards. Section IV outlines secondary containment standards; this section contains the actual standards for the diking of storage tanks and storage containers. Section V discusses transfer station standards. Section VI of this document outlines how exemptions may be granted for specific cases.
Date: April 1, 1995
Creator: Maguire, D.M.
Partner: UNT Libraries Government Documents Department

Operational tank leak detection and minimization during retrieval

Description: This report evaluates the activities associated with the retrieval of wastes from the single-shell tanks proposed under the initial Single-Shell Tank Retrieval System. This report focuses on minimizing leakage during retrieval by using effective leak detection and mitigating actions. After reviewing the historical data available on single-shell leakage, and evaluating current leak detection technology, this report concludes that the only currently available leak detection method which can function within the most probable leakage range is the mass balance system. If utilized after each sluicing campaign, this method should allow detection at a leakage value well below the leakage value where significant health effects occur which is calculated for each tank. Furthermore, this report concludes that the planned sequence or sluicing activities will serve to further minimize the probability and volume of leaks by keeping liquid away from areas with the greatest potential for leaking. Finally, this report identifies a series of operational responses which when used in conjunction with the recommended sluicing sequence and leak detection methods will minimize worker exposure and environmental safety health risks.
Date: March 1, 1996
Creator: Hertzel, J.S.
Partner: UNT Libraries Government Documents Department

Consequence analysis of an unmitigated NaOH solution spray release during addition to waste tank

Description: Toxicological consequences were calculated for a postulated maximum caustic soda (NaOH) solution spray leak during addition to a waste tank to adjust tank pH. Although onsite risk guidelines were exceeded for the unmitigated release, site boundary consequences were below the level of concern. Means of mitigating the release so as to greatly reduce the onsite consequences were recommended.
Date: August 21, 1996
Creator: Himes, D.A., Westinghouse Hanford
Partner: UNT Libraries Government Documents Department

An assessment of simplified methods to determine damage from ship-to-ship collisions

Description: Sandia National Laboratories (SNL) is studying the safety of shipping, radioactive materials (RAM) by sea, the SeaRAM project (McConnell, et al. 1995), which is sponsored by the US Department of Energy (DOE). The project is concerned with the potential effects of ship collisions and fires on onboard RAM packages. Existing methodologies are being assessed to determine their adequacy to predict the effect of ship collisions and fires on RAM packages and to estimate whether or not a given accident might lead to a release of radioactivity. The eventual goal is to develop a set of validated methods, which have been checked by comparison with test data and/or detailed finite element analyses, for predicting the consequences of ship collisions and fires. These methods could then be used to provide input for overall risk assessments of RAM sea transport. The emphasis of this paper is on methods for predicting- effects of ship collisions.
Date: February 1, 1996
Creator: Parks, M.B. & Ammerman, D.J.
Partner: UNT Libraries Government Documents Department

Predicting moisture problems in low-slope roofing

Description: Moisture intrusion is the major reason why low-slope roofing systems fail prematurely. With approximately 75% of all roofing activity being reroofing, the roofing professional is faced with deciding what to do with an existing wet roof on almost a daily basis. This paper describes finite-difference computer modeling that has been performed to address moisture control in low-slope roof systems. Based on a large database of finite difference modeling results, algorithms have been developed that allow the roofing practitioners to simply determine if a roofing system design requires a vapor retarder or if the system can be modified to enhance its tolerance for small leaks. This paper illustrates how modeling results were obtained, describes the process employed to develop the algorithms, and demonstrates how these algorithms can be used to design a moisture tolerant low-slope roof. The range of applicability and limitations of these algorithms is also detailed.
Date: November 1, 1998
Creator: Desjarlais, A.O. & Byars, N.A.
Partner: UNT Libraries Government Documents Department

Trade study of leakage detection, monitoring, and mitigation technologies to support Hanford single-shell waste retrieval

Description: The U.S. Department of Energy has established the Tank Waste Remediation System to safely manage and dispose of low-level, high-level, and transuranic wastes currently stored in underground storage tanks at the Hanford Site in Eastern Washington. This report supports the Hanford Federal Facility Agreement and Consent Order (Tri-Party Agreement) Milestone No. M-45-08-T01 and addresses additional issues regarding single-shell tank leakage detection, monitoring, and mitigation technologies and provide an indication of the scope of leakage detection, monitoring, and mitigation activities necessary to support the Tank Waste Remedial System Initial Single-shell Tank Retrieval System project.
Date: March 1, 1996
Creator: Hertzel, J.S.
Partner: UNT Libraries Government Documents Department

Consequence analysis of a NaOH solution spray release during addition to waste tank

Description: Toxicological consequences were calculated for a postulated maximum caustic soda (NaOH) solution spray leak during addition to a waste tank to adjust tank pH. Although onsite risk guidelines were exceeded for the unmitigated release, site boundary consequences were below the level of concern. Means of mitigating the release so as to greatly reduce the onsite consequences were recommended. Consequences for the mitigated release were estimated and both onsite and offsite consequences were found to negligible.
Date: October 9, 1996
Creator: Himes, D.A., Westinghouse Hanford Co.
Partner: UNT Libraries Government Documents Department