Table. 1 Classification of situations. Requirements and related criteria for maximum acceptable – pressure and temperature values (PS and TS) for nuclear pressure equipment excluding main primary and main secondary systems. Classification of situations with reference to the PS / TS harmonised standards Normal operating Normal situations - T TS.  operating Common - P PS.  situations operational incident situations - P 110 % PS and short-term  exceedance; Reasonably - Equipment checks (unless suitable foreseeable design as defined in the body of the Exceptional situations situations guide). - adequate protection device when T TS.  - Pressure of resistance test Test situations performed for the final check includes service test pressures. Highly improbable situations To avoid the risk of losing integrity if PS and TS are exceeded in relation to the requirements defined in the safety report.
Table. 1 – Classification of situations. Requirements and related criteria for maximum acceptable pressure and temperature values (PS and TS) for nuclear pressure equipment excluding main primary and main secondary systems. Classification of situations with reference to the harmonised standards PS / TS Reasonably foreseeable situations Normal operating situations Normal operating situations - T  TS. - P  PS. Common operational incident situations Exceptional situations - P  110 % PS and short-term exceedance; - Equipment checks (unless suitable design as defined in the body of the guide). - adequate protection device when T  TS. Test situations - Pressure of resistance test performed for the final check includes service test pressures. Highly improbable situations To avoid the risk of losing integrity if PS and TS are exceeded in relation to the requirements defined in the safety report.
ASN_Guide_19.docx