Pipe supports definition

The design of support structures (not covered by this Code) and of supporting elements (see definitions of piping and pipe-supporting elements in para. GR-1.5) shall be based on all concurrently acting loads transmitted into such supports. These loads, defined in para. IP-2.1, include weight effects, loads introduced by service pressures and temperatures, vibration, wind, earthquake, shock, and displacement strain [see para. IP-6.1.3(a)]. 

On the basis of the translational energy releases in the collision-induced decompositions relative to those in the unimolecular decompositions, it appeared [216] that, in the losses of H2 from (CH3OH2), (CHsOH) and (CH20H), the energy releases became smaller at the higher excess energies. This somewhat surprising conclusion appears not to be supported by the results of a PIPECO study of methanol [18, 658] however, the PIPE CO results are not sufficiently precise to constitute definite proof that the conclusion is incorrect. 

Dry chlorine is defined as chlorine with its water content dissolved in solution. An exact definition of dry and wet chlorine supported by charts of water solubility in chlorine as a fimction of temperature can be found in Chlorine Institute publications [7, 8]. In general, steel piping is recommended for handling dry chlorine. Stainless steels of the Type 300 series have useful properties for service at low temperatures, but can fail due to chloride stress corrosion cracking, particularly in the presence of moisture at ambient or elevated temperatures. 

The success-path definition should make sure that the most likely scenarios of plant disturbance after a design-exceeding seismic event are covered. At least two success paths - leading to a durable safe state of the plant - need to be defined, and one of the two success paths should include the mitigation of a small break loss of coolant accident (LOCA), unless even a small break LOCA can be excluded, e.g., due to a particularly high quality of the supports of small-bore primary piping such as measurement lines. 

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