05000369/FIN-2018010-01: Difference between revisions
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| Inspection procedure = IP 71111.21M | | Inspection procedure = IP 71111.21M | ||
| Inspector = G Ottenberg, B Davis, M Greenleaf, M Schwieg, H Leake, M Yeminy, M Sykes | | Inspector = G Ottenberg, B Davis, M Greenleaf, M Schwieg, H Leake, M Yeminy, M Sykes | ||
| CCA = | | CCA = | ||
| INPO aspect = WP.2 | | INPO aspect = WP.2 | ||
| description = The inspectors identified a Green finding for the licensees failure to update calculations as required by procedure AD-EG-ALL-1117, Design Analyses and Calculations, Rev. 5. Specifically, the licensee revised calculation MCC-1381.05-00-0258, U1, 6.9kV, 4.16kV & 600V Auxiliary Power Systems Safety-Related Voltage Analysis, Rev. 6, to identify the effect of longer motor-driven auxiliary feedwater pump (CA pump) acceleration times on the switchyard voltage limits in place to ensure offsite power source operability. However, the licensee failed to update the previously analyzed condition of only one offsite circuit in service from the switchyard to the 4160V Class 1E buses via the unit step-up and unit auxiliary transformers (single busline alignment). As a result, there was no verification that the offsite circuit operability limit was adequate during single busline alignment | | description = The inspectors identified a Green finding for the licensees failure to update calculations as required by procedure AD-EG-ALL-1117, Design Analyses and Calculations, Rev. 5. Specifically, the licensee revised calculation MCC-1381.05-00-0258, U1, 6.9kV, 4.16kV & 600V Auxiliary Power Systems Safety-Related Voltage Analysis, Rev. 6, to identify the effect of longer motor-driven auxiliary feedwater pump (CA pump) acceleration times on the switchyard voltage limits in place to ensure offsite power source operability. However, the licensee failed to update the previously analyzed condition of only one offsite circuit in service from the switchyard to the 4160V Class 1E buses via the unit step-up and unit auxiliary transformers (single busline alignment). As a result, there was no verification that the offsite circuit operability limit was adequate during single busline alignment | ||
}} | }} | ||
Latest revision as of 18:35, 10 September 2018
| Site: | McGuire  |
|---|---|
| Report | IR 05000369/2018010 Section 1R21 |
| Date counted | Mar 31, 2018 (2018Q1) |
| Type: | Finding: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.21M |
| Inspectors (proximate) | G Ottenberg B Davis M Greenleaf M Schwieg H Leake M Yeminy M Sykes |
| INPO aspect | WP.2 |
| ' | |