ML13066A587

Email from J. Mitman, NRR to F. Ferrante, NRR on Jocassee Inflow Calc

ML13066A587
Person / Time
Site:	Oconee
Issue date:	11/09/2010
From:	Jeffrey Mitman Office of Nuclear Reactor Regulation
To:	Ferrante F Office of Nuclear Reactor Regulation
References
FOIA/PA-2012-0325
Download: ML13066A587 (4)

Text

Mitman, Jeffrey From: Mitman, Jeffrey I IJ *'

Sent: Tuesday, November 09, 2010,9:04 PM To: Ferrante, Fernando * ,

Subject:

Jocassee inflow calc Attachments: Reservoir Volumes (2).xlsx Fernando, attached is my revised spreadsheet.

With the additional data at the elevations of interest (1106 to 1125) I've re-plotted just this portion of the basin curve. According to Excel the curve is linear in this region. Let me know what you think.

I've also plotted the surface area based on the available data.

I've tried to reproduce the max inflow (inflow + rain water) equal to 522,000 using the HECI detailed output.

But I cannot get the 378,282 cfs plus the 0.53 in./hr. near the known total of 522,000. Ifyou've got time to kill, you can look at "Sheet2" of the spreadsheet to see my attempts.

However, looking through the output, I have found the composite parts. The HECI flood routing output shows a max total inflow of 522,734 (at time 40.33) with a max total routing of 378,282 (at time 40.50) and a max direct (rain) of 157,680 (at time 40.17), or: 378,282 + 157,680 = 535,962. This is close enough for me to the stated value of 522,734. I attribute the discrepancy to the difference in the times of the various maximums.

Jeff 1

se sa sq se Computed surface total elevation Storage discharge area discharge (ft. MSL) Volume (acre from spillway (acre) (SCFM) ft) 70,000 1 760 0 0 1080 60,000 2 780 180 1,200 0 1105.99 3 820 650 16,827 26,600 1106 0 50,000 4 860 1500 58,660 26,600 1110.99 0 40,000 5 900 2450 136,887 67,475 1111 40,875 30,000 6 940 3450 254,318 69,074 1112 42,474 7 980 4350 409,970 72,295 1114 45,695 20,000 8 1020 5300 602,658 75,539 1116 48,939 10,000 9 1060 6250 833,397 78,801 1118 52,201 10 1100 7250 1,103,150 82,076 1120 55,476 11 1123 7500 1,272,767 85,359 1122 58,759 12 1123.5 1,276,518 87,822 1123.5 61,222 isannon1 I -F surface area (acre) torage Capacit 8000 1,340,000 7000 Y= 11 1,320,000 6000 1,300,000 1,280,000 5000 1,260,000 4000 surface area (acre) 1,240,000 3000 1,220,000 -

2000 1,200,000 1000 1,180,000 950 1,160,000 --

0 750 850 950 1050 1,140,000 --

1,120,000

Spillway Discharge Curve Elevation Storage Capacity 760 780 1,200 820 16,827 860 58,660 900 136,887 Y= 1628.5x - 2E+06 940 254,318 D2- i 980 409,970 1020 602,658 1060 833,397 1100 1,103,150 L110 1112 1114 1116 1118 1120 1122 1124 1126 1128 1106 1,146,702 1107. 1,154,51 118 ,161,495 1113.8 1204254 1106.2 1,222,252 1120.17 1,250,912.

V1121.1 71,258,243 1123 1,272,767 1123.5 1,276,518 1125 [ ,8 788"i 1130 1125.5 1126

Excel Mitman Fernando (152,147) 9,863 13,240 (161,305) 705 2,460 105.00%

(152,073) 9,937 8,860 -47.35%

(106,111) 55,899 52,540 -10.43%

(23,420) 138,590 133,500 -2.47%

96,001 258,011 251,740 -1.01%

252,151 414,161 407,260 -0.66%

445,031 607,041 600,060 -0.43%

674,641 836,651 830,140 -0.39%

940,980 1,102,990 1,097,500 -0.51%

984,099 1,146,109 1,140,819 -0.51%

991,366 1,153,376 1,148,121 -0.53%

998,655 1,160,665 1,155,446 -0.52%

1,013,304 1,175,314 1,170,165 -0.46%

1,030,263 1,192,273 1,187,208 -0.51%

1,041,389 1,203,399 1,198,389 -0.49%

1,059,297 1,221,307 1,216,387 -0.48%

1,074,322 1,236,332 1,231,489 -0.44%

1,088,681 1,250,691 1,245,922 -0.40%

1,096,271 1,258,281 1,253,552 -0.37%

1,103,123 1,265,133 1,260,439 -0.38%

1,110,757 1,272,767 1,268,113 -0.37%

1,114,582 1,276,592 1,271,959 -0.36%

1,126,094 1,288,104 1,283,531 -0.33%

1,164,838 1,326,848 1,322,485 1,129,942 1,291,952 1,287,400 1,133,797 1,295,807 1,291,275