Evaluation procedures

A-scans with a visual evaluation by the tester to be of little significance. New measuring-data-evaluation-procedures were needed to place additional information at the testers disposal. 

Elaborate evaluation procedures were developed for the following mechanistic classes of reactions ... 

The reactivity ratios of a copolymerization system are the fundamental parameters in terms of which the system is described. Since the copolymer composition equation relates the compositions of the product and the feedstock, it is clear that values of r can be evaluated from experimental data in which the corresponding compositions are measured. We shall consider this evaluation procedure in Sec. 7.7, where it will be found that this approach is not as free of ambiguity as might be desired. For now we shall simply assume that we know the desired r values for a system in fact, extensive tabulations of such values exist. An especially convenient source of this information is the Polymer Handbook (Ref. 4). Table 7.1 lists some typical r values at 60°C. 

Center for Chemical Process Safety, Guidelinesfor Hazard Evaluation Procedures, American Institute of Chemical Engineers, New York, 1992. 

Safety, Health, and Loss Prevention in Chemical Processes Student Problems Instmctor s Guide for Undergraduate Engineering Curricula Ha2ard Evaluation Procedures, with Worked Examples, 2nd ed. 

The science of color measurement has been explored by various authors (127,128). AATCC evaluation procedure no. 6 describes a method for instmmental measurement of color of a textile fabric. AATCC evaluation procedure no. 7 may be used to determine the color difference between two fabrics of a similar shade. Instmmentation may be either a spectrophotometer for measuring reflectance versus wavelength, or a colorimeter for measuring tristimulus values under specified illumination. If a spectrophotometer is used, however, the instmment must be equipped with tristimulus integrators capable of producing data in terms of CIE X, Y, and Z tristimulus values. 

When making comparisons of lethal toxicity, it must be remembered that different mechanisms may be iavolved with different materials, and these need to be taken iato account. Also, comparisons of acute toxicity should take note of differences ia time to death, siace marked differences ia times between dosiag and death may influence ha2ard evaluation procedures and thek implications. In a few kistances, it may be possible to calculate two LD q values for mortaUty one based on early death due to one mechanism, and a second based on delayed deaths due to a different mechanism (69). 

Evaluation procedures, ISO 4097 Jihher, ethylene—propylene—diene (EPDM), Non-oil extended raw general-purpose types, 1992. 

The relatively high prices of pulp and paper filters reflect the construction features that accommodate the veiy high hydraulic capacity that is required. The absence of data for some common types of filters, in particular the filter press, is explained by Hall as due to the complex variety of individual features and materials of construction. For information about missing filters and for firmer estimates for those types presented, vendors should be consulted. In all cases of serious interest, consultation should take place early in the evaluation procedure so that it can yield timely advice on testing, selection, and price. 

Evaluate procedure for installation/hook-up to ensure proper safety is achieved... 

Is a decommissioning phase hazard evaluation needed The AIChE/CCPS text. Guidelines for Hazard Evaluation Procedures, Second Edition, offers direction for addressing this type of evaluation. 

The cross-section curve a(E) gives the dependence of the nuclear cross-section on the projectile energy, E. The measured energy spectra of emitted particles or the excitation curve N(Eq) wiU depend on the depth profile N(x) of the analyzed isotope and on the cross-section curve (t(E(x)), where E(x) gives the energy of the projectiles at a depth x. Evaluation of the depth profile N (x) from measured energy spectra or excitation curves often requires a tedious evaluation procedure if the cross-section curve has a complex structure. It is simplified for two special types of behavior of the cross-section curve ... 

The following checklist contains a number of questions which can aid in identifying inherently safer process options. The list is adapted from CCPS (1993a). Other checklists, particularly the extensive checklist in Appendix B of the Guidelines for Hazard Evaluation Procedures, 2nd Edition with Worked Examjzles (CCPS, 1992) contain many questions which are related to inherent safety. 

ASEP Accident Sequence Evaluation Procedure NUREG/CR-4772. 1987... 

These accidents would have been prevented by 1) adequate process safety design, 2) proper-procedures to prevent the initiation, 3) hazard evaluation procedures to identify and correct Iia/.ards hc fure accident occurrence, and 4) containment systems to prevent release into the aimosphci c,... 

Swain, A. D., Accident Sequence Evaluation Procedure (ASEP) Huan Reliability Analysis Procedure, 1987. 

Evaluation procedures for local ventilation are described in Section 10.5. The actual evaluation procedure for a specific system is mostly described in connection with the different parameters that influence the function of the system. Many of the evaluation procedures for general ventilation systems described in Chapter 12 could be used also for local ventilation. 

TABLE 10.1. Relationships between Different Evaluation Procedures and Different Hood Types... 

All exterior hoods should be evaluated regularly. The evaluation procedures can be divided into detailed and simple procedures. Detailed procedures need special instruments and competence, whereas simple procedures may be performed daily. Since simple procedures do not directly measure the performance of the exhaust, it is usually necessary to calibrate them using detailed procedures. 

The design equations for pressure drops can also be used for evaluation procedures (Section 10..5. ... 

CPI. The first book, Guidelines for Hazard Evaluation Procedures (HEP Guidelines), eovers methods for identifying and qualitatively assessing chemical process hazards. 

Adapted from "Guidelines for Hazard Evaluation Procedures, CCPS, AICliE, New York City, NY, 1992. 

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