Applicable Code Cases

VI-1.1.2 Cases. Cases represent alternatives or additions to existing Code rules. Cases are written as a question and reply, and are usually intended to be incorporated into the Code at a later date. When used, Cases prescribe mandatory requirements in the same sense as the text of the Code. However, users are cautioned that not all jurisdictions or owners accept Cases. The most common applications for Cases are... 

Quotations from medical literature or personal communications must accurately reflect the author s meaning and the study s significance (except where adaptation or modification is required in order to comply with any applicable code(s) or laws, in which case it must be clearly stated that the quotation has been adapted and/or modified) and the precise sources identified and they must accurately reflect the meaning of the author and significance of the study or analysis. 

Differences in design practices have in the past handicapped developments that could have reduced costs. For example, some difficulties with past design practices are evident in examining application of the ASME Code and Code Case N-47 to pool type LMFRs, such as Super Phenix. The design of Super Phenix resulted in considerably thinner components. This required different buckling rules. Super Phenix design creep effects were negligible... 

These Code Cases should be used, as applicable, to supplement Subsection NB and NC for elevated-temperature design. 

Because the Ki, and Ki curves in the ASME Code are normalized to REndt, potential application of the Master Curve procedure within the ASME Code structure is not straightforward. Figure 10.7 from Sokolov and Nanstad (1999) shows the relationship between REndt and the Master Curve Eo for the steels used to construct the A curve shown in Fig. 10.2. To overcome the lack of correlation between Eo and REndt, the Pressure Vessel Research Council and the Electric Power Research Institute (EPRI) in the USA developed a separate reference temperature based on Eo (Server et al, 1998 Van Der Sluys et al., 2000, 2001a, b). This reference temperature, RTj, was developed by determination of a temperature offset to Eo that would bound the fracture toughness data similar to that of the Ric curve in the ASME Code and has been incorporated into the ASME Code by Code Cases N-629 (ASME, 2013b) and N-631 (ASME, 2013c). Thus, in this scheme, Eq. 10.11 is contained in both Code Cases ... 

These Code Cases allow the determination of RE when Eo is measured. Application to RPV integrity also requires knowledge of uncertainties associated with the use of a measured RE in place of REndt-The application... 

The hrst use was indirect in that Master Curve data were used to support a lower value of non-irradiated R7W)t for some Linde 80 welds, rather than defining a value of RT (Lott et al., 1998) this application for the Zion RPVs was actually submitted and approved before ASTM E 1921-97 or the ASME Code Cases were finalized. 

Identification of applicable design and construction codes for all the systems and components, such as mechanical equipment of NSSS, electrical systems, instrumentation control systems, buildings and stmctures, conventional equipment and plant siting is bring done. For mechanical components of NSSS, ASME Sec III, Code Case N47 and RCC-MR are bring conridered. 

AS ME BoUer and Pressure Vessel Code Case N155. This code also provides rules for the construction of FRP piping systems for use in nuclear power plant applications. 

If the loose parts, neutron noise or vibration monitoring systems indicate that there is a loose part in the reactor vessel or that the fuel or reactor internals are vibrating, the information/data should be diagnosed. In the case of a loose part, the size or weight and the location in the primary coolant system can be determined and a decision as to plant shut down could be made based on safety and/or economic consideration. In the case of neutron noise or direct vibration monitoring, if there is an indication that either the fuel or a component of the reactor internals is vibrating, the information/data should be diagnosed in accordance with the applicable code, such as the ASME Section on Operation and... 

Schneider, R. W. and E. O. Waters, The Application of ASME Code Case 1828, Trans. ASME, Journal Pressure Vessel Technology. Vol. 101, No. 1, February 1979, pp. 87-94. 

Besides semaphore operations, there are additional critical sections consisting in disabling all the interrupts to avoid pre-emption (used just in device drivers and RTEMS routines). But as these are meant to be used for very short operations, and they cannot be instrumented (due both to the overhead and the fact that is not application code), it is appropriate to consider just the worst-case blocking produced by the application locks. Finally, the analysis of these traces proved very useful, revealing different bugs in lock usage. 

In cases where the above requirements are not met, welding procedure qualification tests in accordance with applicable codes should be performed, and welding procedures for the portions subjected to the tests should be submitted for agreement separately. 

The performances and estimating methods of welded PHEs match those of gasketed PHEs in most cases, but normally the Compabloc, with larger depth of corrugations, can be lower in overall coefficient. Some extensions of the design operating conditions are possible with welded PHEs, most notably is that ciyogenic applications are possible. Pressure vessel code acceptance is available on most units. 

Provide employee accident experience for the past 5 years, including the current year. The submittal shall specifically include OSHA recordable cases rate, lost and restricted workday cases rate, vehicle accident rate, and number of fatalities with a description of each. The workers compensation interstate experience modification rate should be less than 1.0, and applicable SIC codes should be noted. 

The disk contains over 120 models in files that may contain source and executable code, sample input lilcs, other data files, sample output files, and in many cases, model documentation in WordPerfect, ASCII text or other formats. The disk contains IMES with information on >clecting tin appropriate model, literature citations on validation of models in actual applications, and a demonstration of a model uncertainty protocol. 

Systems and control configurations as required may not be available in the simulation code or may not be able to be described and modeled in the required detail. Depending on the application, an optional system extension or change can be defined using the existing model. Otherwise, a new model has to be developed and integrated into the code. In these cases, it is decisive for the selection of code used whether and how easily such an extension can be implemented. 

For catastrophic demand-related pump failures, the variability is explained by the following factors listed in their order of importance system application, pump driver, operating mode, reactor type, pump type, and unidentified plant-specific influences. Quantitative failure rate adjustments are provided for the effects of these factors. In the case of catastrophic time-dependent pump failures, the failure rate variability is explained by three factors reactor type, pump driver, and unidentified plant-specific Influences. Point and confidence interval failure rate estimates are provided for each selected pump by considering the influential factors. Both types of estimates represent an improvement over the estimates computed exclusively from the data on each pump. The coded IPRDS data used in the analysis is provided in an appendix. A similar treatment applies to the valve data. 

FPN) The area classifications listed in Table 515-2 are based on the premise that the installation meets the applicable requirements of Elammable and Combustible Liquids Code, NFPA 30-1993 (ANSI), Chapter 5, in all respects. Should this not be the case, the authority havingjurisdiction has the authority to classify the extent of the classified space. 

---