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Static elimination work stations. Final report

Description: Electrostatic charges, if not properly controlled, can destroy or degrade certain semiconductor devices. Several techniques for controlling static charges were evaluated, using an electronic signal selector as the primary model for investigation. Included in the evaluation were air-ionizing equipment, encapsulant additives and materials, antistatic spray, and the use of x-rays.
Date: December 1, 1978
Creator: Hedges, R.S. & Bellah, J.L.
Partner: UNT Libraries Government Documents Department

Improved methods of fabricating multilayer printed wiring boards. Final report

Description: A reliable process for the fabrication of multilayer printed wiring boards has been further improved by implementing a solder-dip-and-level process in place of the conventional pattern-tin-lead-plate process. A commercial chronic acid etchant has proven to be superior to the previously used sulfuric acid etchback solution. An economical, disposable polyvinyl-fluoride-film release sheet has been adopted, and a nuclear static-electricity eliminator has proven effective in providing lint-free panels.
Date: January 1, 1978
Creator: Wilson, J.L.
Partner: UNT Libraries Government Documents Department

Explosion proofing the ``explosion proof`` vacuum cleaner

Description: Because of the low humidity environments required in the fabrication of nuclear explosives, assembly technicians can be charged to tens of kilovolts while operating, for example, compressed air, venturi-type, `explosion proof` vacuum cleaners. Nuclear explosives must be isolated from all sources of, and return paths for, AC power and from any part of the lightning protection system. This requirement precludes the use of static ground conductors to drain any charge accumulations. Accordingly, an experimental study of the basic charging mechanisms associated with vacuum operations were identified, the charge generation efficacies of various commercial cleaners were established, and a simple method for neutralizing the charge was devised.
Date: July 1, 1995
Creator: Jones, R.D.; Chen, K.C. & Holmes, S.W.
Partner: UNT Libraries Government Documents Department

Final report of the Static Bonding Team, Pantex Plant, Amarillo, Texas

Description: The integrity of the electrostatic bonding procedures used to equilibrate operating technicians and weapon components was questioned during the course of the quality evaluation assessments of the W70, W68, and B57 dismantlement programs. A multi-disciplined, interlaboratory team was convened on an ad hoc basis to resolve certain static bonding issues. The accomplishments of this team in upgrading the integrity of the bonding process include recommendations on the proper use of wrist straps, training of technicians in their use, and procedures to reduce accumulation of static charge on components during routine handling operations.
Date: December 1, 1993
Creator: Jones, R. D.; Chen, K. C. & Holmes, S. W.
Partner: UNT Libraries Government Documents Department

Vacuum cleaner modifications leading to reduced ESD hazards

Description: After a series of meetings held in response to an Unsatisfactory Report on the use of vacuum cleaners, an experimental study of commonly available vacuum cleaners was conducted. The object of the study was to evaluate the effectiveness of the cleaners as electrostatic generators. The electrical charges generated by the machine can inadvertently be transferred in normal operations to electroexplosive devices (EEDs), thereby creating a potentially hazardous situation. In the course of this study, it was determined that many inexpensive commercial cleaners could be used safely providing certain modifications were made. Details of the required modification and rationale for the modification are presented in this report.
Date: March 1, 1994
Creator: Jones, R. D.; Chen, K. C. & Holmes, S. W.
Partner: UNT Libraries Government Documents Department

Electrostatic discharge testing of electroexplosive devices

Description: Electrostatic discharge (ESD) testing of electroexplosive devices has previously been regarded as single pulse, go/no-go testing, the emphasis being on the safety of the devices when exposed to human handling. For some components it has been found to be a destructive test; for others the test is performed 100% in production product-acceptance testing and is considered a nondestructive and nondegrading test if the component does not fire. Recent studies performed by R. J. Fisher at Sandia have resulted in a new model of the worst case human body electrostatic discharge that is more accurate than the model that is currently in use for testing electroexplosive components. In addition, recent requirements for no degradation or loss of reliability after multiple exposures (up to 100) have changed the go/no-go nature of the test. Several components have been tested to the new ESD model; results regarding both safety and reliability will be presented and discussed. 9 refs., 7 figs., 2 tabs.
Date: January 1, 1990
Creator: Hingorani, S.L.
Partner: UNT Libraries Government Documents Department

Test plan for engineering scale electrostatic enclosure demonstration

Description: This test plan describes experimental details of an engineering-scale electrostatic enclosure demonstration to be performed at the Idaho National Engineering Laboratory in fiscal year (FY)-93. This demonstration will investigate, in the engineering scale, the feasibility of using electrostatic enclosures and devices to control the spread of contaminants during transuranic waste handling operations. Test objectives, detailed experimental procedures, and data quality objectives necessary to perform the FY-93 experiments are included in this plan.
Date: February 1, 1993
Creator: Meyer, L. C.
Partner: UNT Libraries Government Documents Department

Test plan for engineering scale electrostatic enclosure demonstration

Description: This test plan describes experimental details of an engineering-scale electrostatic enclosure demonstration to be performed at the Idaho National Engineering Laboratory in fiscal year (FY)-93. This demonstration will investigate, in the engineering scale, the feasibility of using electrostatic enclosures and devices to control the spread of contaminants during transuranic waste handling operations. Test objectives, detailed experimental procedures, and data quality objectives necessary to perform the FY-93 experiments are included in this plan.
Date: February 1, 1993
Creator: Meyer, L.C.
Partner: UNT Libraries Government Documents Department

Radioactivity in consumer products

Description: Papers presented at the conference dealt with regulations and standards; general and biological risks; radioluminous materials; mining, agricultural, and construction materials containing radioactivity; and various products containing radioactive sources.
Date: August 1, 1978
Creator: Moghissi, A.A.; Paras, P.; Carter, M.W. & Barker, R.F. (eds.)
Partner: UNT Libraries Government Documents Department