This report presents measurements of the {sup 4}G{sub 7/2} emission for 26 nd-doped materials. A model of nonradiative decay based on dipole-dipole energy is developed and found to be supported by the data.

The initial issue (Revision 0) of this Safety Equipment List (SEL) for the Light Duty Utility Arm (LDUA) requires an explanation for both its existence and its being what it is. All LDUA documentation leading up to creation of this SEL, and the SEL itself, is predicated on the LDUA only being approved for use in waste tanks designated as Facility Group 3, i.e., it is not approved for use in Facility Group 1 or 2 waste tanks. Facility Group 3 tanks are those in which a spontaneous or induced hydrogen gas release would be small, localized, and would not exceed 25% of the LFL when mixed with the remaining air volume in the dome space; exceeding these parameters is considered unlikely. Thus, from a NFPA flammable gas environment perspective the waste tank interior is not classified as a hazardous location. Furthermore, a hazards identification and evaluation (HNF-SD-WM-HIE-010, REV 0) performed for the LDUA system concluded that the consequences of actual LDUA system postulated accidents in Flammable Gas Facility Group 3 waste tanks would have either NO IMPACT or LOW IMPACT on the offsite public and onsite worker. Therefore, from a flammable gas perspective, there is not a rationale for …

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There is no new activity or procedure associated with the updating of this reference document. The updating of this system design description maintains an agreed upon documentation program initiated within the test program and carried into operations at time of turnover to maintain configuration control as outlined by design authority practicing guidelines. Any changes made to controlled components in the field will be updated after the time of implementation to support the engineers and operators understand, maintain, train to and operate the system. There are no new credible failure modes associated with the updating of information in a support description document. The failure analysis of each change was reviewed at the time of implementation of the Systems Change Request for all the processes changed. This document simply provides a history of implementation and current system status. The incorporation of the two documents, Computer Systems Design Description (HNF-SD-WMCSDD-008) and the Input/Output Channel List (HNF-SD-WM-EL-001), as appendices allow for fewer errors in changes. Because the documents are all together, they will be approved as one document, not three separate entities which could be updated at different times, creating a situation which does not accurately depict field conditions.

The finite element method has been used to investigate the stress field in mechanical suspension systems. The critical seismic loads are depended on three-dimensional dynamic response of vacuum vessels and interactions of the equipment supporting structures to the vacuum vessels and supporting system. In this study of the optics assembly equipment (15 to 27 Hz), it was shown that the pressure vessel systems which supports the optics assembly systems (6.5 to 13 Hz) have significant influence in the seismic response of the rotary latch assembly. A potentially critical failure location is identified. An axisymmetrical elastic analysis predicts stress at the inner radius of the lower housing can be reduced by 60% with simple design modification. Use of three-dimensional dynamic model and static model to evaluate the combined complex stress permits prediction of the rotary latch assembly operating life and seismic safety.

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We report on planar waveguides formed by field assisted ion exchange in Nd{sup 3+} and Yb{sup 3+} doped phosphate glasses. Losses of 0.71 dB/cm are measured. Electron probe measurements confirm Ag{sup +} diffusion.