Seismic Test

Q.

(Lot 2 - FDU)
Seismic test:
we see in the Technical Specification the following indications:
on § 7.2.8 4): "Test to evaluate the seismic resistant design of the components of the FDU: The natural frequency of equipment composing the FDU unit shall be measured and shall be higher than 20 Hz."
on § 11.2: "FDUs shall be manufactured based on class B standard; … they shall be designed following the guideline for seismic resistant design for power supply equipment of IEC68‐3‐3 standard."
We understand that the design must be according to these requirements, but it is not clear to us if seismic TESTS are required; if yes, which kind of tests and on which FDU equipment?

A. 

(Lotto 2) As reported in section 11.2 and 7.2.8 bullet point 4 (Whole Fast Discharge Unit), the seismic tests are mandatory they are type test and shall be performed on the entire FDU and hence on all components (I think separately on BPS/SCB and on DRs, but depends on total weight) during DDP we will decide if to apply this test only on mock-up (prototype) or only the first FDU. This can depend on if there is a different weights distribution between mock-up and first FDU.

 

 

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