Photo data analysis system

PDAS photo data analysis system PES photoelectron spectroscopy... 

Efforts are being made to develop a new relational data base system of LMFBR component reliability data on an engineering work station. The system is based on CREDO (Centralized Reliability Data Organization), a cooperative project between PNC and the USDOE, which ended in 1992. As part of the data analysis reliability parameters were quantitatively estimated for sodium mechanical pumps, i.e., failure rates, probability of common cause failures and lepairability. Additionally, risk-related data on energy production systems such as solar photo voltaic energy system and LMFBR nuclear fuel cycle have been collected. 

Until now, many technical and research papers concerning photo-initiated treatment processes of water or air are almost useless for synoptic discussions due to the lack of precise data describing the photoreactor, its components and a comprehensive set of the analytical and engineering parameters of the system. Thus, a detailed analysis of the experimental information necessary for the correct description of photoprocesses (for example in technical publications) will help to facilitate future work and communication in this interdisciplinary field of research and development. 

As an example, I will use the determinations of DOC and DON, partly because the discussions are very recent and partly because they are very familiar to me. The question of the accuracy of measurements of DOC in seawater has been disputed at least since the publications of Putter [62] and Krogh [63] the early work has been reviewed at length in an earher pubhcation [64]. While a variety of wet oxidation methods [65] were proposed for marine samples, the use of persulfate [35] provided the first real approach to a standard method. Persulfate oxidation, however, hke all purely chemical oxidations, was a batch process, and not easily automated. A number of workers proposed photo oxidation using ultraviolet (UV) hght [66-70], and automated analytical systems which produced data almost in real time were soon constructed [71-73]. Commercial units soon appeared, but many of the units in the field were jerry-built, constructed out of parts scavenged from discarded autoanalyzers formerly used for nutrient analysis. 

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