IEEE Std 650-2017 pdf download – IEEE Standard for Qualification of Class 1E Static Battery Chargers, Inverters, and Uninterruptible Power Supply Systems for Nuclear Power Generating Stations.
4.2.2 Description of the safety function of Class 1E charger or inverter The safety function(s) of the equipment (including required operating time) shall be specified for applicable service and DBE conditions expected during its qualified life. 4.2.3 Qualified life objective (where applicable) The equipment qualified life objective shall be specified along with the set of service conditions under which successful performance must be demonstrated before, during, and after a DBE as applicable. 4.3 Environment All significant environmental parameters shall be specified in the owner’s specification. The range of environmental conditions shall include, as a minimum, normal and abnormal conditions and durations, as well as DBE and post-DBE conditions. Where applicable, the equipment specification shall include numerical values for the magnitude and duration of the following service conditions: a) Minimum and maximum temperature, including profiles if available b) Minimum and maximum storage temperature c) Maximum relative humidity (operating and storage) d) Altitude (static air pressure) e) Operational vibration f) Seismic requirements g) Nuclear radiation type h) Irradiation (dose rate and total dose) i) Radio frequency interference (RFI) and/or electromagnetic interference (EMI) levels (i.e., the effects of the charger, inverter, or UPS systems on other equipment or vice versa) as defined in NRC Reg. Guide 1.180, Revision 1 [B19]. Regulatory Guide 1.180 recommends using MIL-STD- 461E [B18] and IEC Std 61000-4-series to perform electromagnetic compatibility (EMC) testing. Information on EMI/RFI and surge voltages are also given in is given in IEC 62003 [B5], IEC 62040-2 [B6], EPRI 102323 [B3], and IEEE P2425 [B16].
4.4 Other conditions Where applicable, the equipment specifications shall include the following: a) Any significant rate of change or combinations of specified performance and environmental limits listed in 4.2 and 4.3 b) The expected total number of operating cycles or operating time period for the electromechanical devices (including periodic testing cycles) c) Unusual atmospheric contamination (dust, oil, fungus, chemical or water spray, etc.) d) Electrical and mechanical interfaces (input and output connections, mounting, voltages, currents, etc.) between the Class 1E equipment to be qualified and other equipment or devices e) Dielectric test parameters 5. Qualification The qualification of Class 1E static battery chargers, inverters, and UPS systems shall be established by analysis and test as outlined in this clause. Figure 1 provides a pictorial overview.