ML112370085
| ML112370085 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 08/24/2011 |
| From: | Burford F Entergy Operations |
| To: | Wang A Plant Licensing Branch IV |
| Wang, A B, NRR/DORL/LPLIV, 415-1445 | |
| References | |
| Download: ML112370085 (1) | |
Text
From:
BURFORD, FRANCIS G [FBURFOR@entergy.com]
Sent:
Wednesday, August 24, 2011 2:35 PM To:
Wang, Alan Cc:
BURFORD, FRANCIS G; MILLAR, DANA; BROADBENT, GREGORY E; ANDERSON, KENNETH
Subject:
FW: peer check, please The information below provides a summary of the evaluation we had mentioned in our conversation with SCVB (Ahsan). If he has any questions, please let us know.
Thanks Jerry From: BROADBENT, GREGORY E Sent: Wednesday, August 24, 2011 10:50 AM To: BURFORD, FRANCIS G Cc: ANDERSON, KENNETH; THORNTON, THOMAS W
Subject:
RE: peer check, please Thanks Kenny.
Jerry, below is what we suggest you transmit to the NRC regarding Pa.
- Greg An evaluation was performed to confirm that leakage test results based on the former Pa would still be expected to satisfy the appropriate acceptance criteria when tested at the new higher Pa. Basically, the leakage was scaled by a factor of 1.134 based on the relationship of the leakage rate to the square root of the pressure. A review of the testing results at GGNS demonstrates that substantial margin exists between the extrapolated results and the relevant acceptance criteria. All the increased leakage rates were found to comply with the current Tech Spec requirements that include margin to La. Thus, adequate margin is still available for the higher test pressure. A summary of key results from that presentation is presented below.
Test Units Measured
@ 11.5 psig Predicted
@14.8 psig Limit Basis for Limit Type A wt%/day 0.210 0.238 0.5115 0.75La per Tech Spec SR 3.6.1.1.1 Type B+C wt%/day 0.160 0.182 0.4092 0.6La per Tech Spec SR 3.6.1.1.1 Type A+B+C wt%/day 0.370 0.420 0.682 La per Tech Spec SR 3.6.1.1.1 MSIV (Worst-Case MSL) scfh 76.7 87.0 100 Tech Spec SR 3.6.1.3.8 MSIVs (All MSLs) scfh 166.3 188.6 250 Tech Spec SR 3.6.1.3.8