ML030800466
| ML030800466 | |
| Person / Time | |
|---|---|
| Site: | Point Beach  |
| Issue date: | 11/07/2002 |
| From: | Kendall T Wisconsin Electric |
| To: | O'Brien K NRC/RGN-III |
| References | |
| FOIA/PA-2003-0094 | |
| Download: ML030800466 (4) | |
Text
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-Flo Liiitig Oific DeignxlsPage 11 From:
To:
Date:
Subject:
"Kendall, Thomas" <Thomas.Kendapll@nmcco.com>
<kgo@nrc.gov>
ell 11/7/02 3:54PM Flow Liimiting Orifice Design.xls Mr. O'Brian, Here's the results of my Monday Morning noodling. Not very detailed on the descriptions I'm afraid. I used Crane 410 to come up with the flow formulas, and some excerpts from a paper I have on cavitation in valves, orifices, etc. I'll copy the stuff from the paper and bring it over. The stuff in red is input, the rest is calculated. I tried to maintain a margin to cavitation of -2 (last column). The second sheet is where I created the critical cavitation index curve from published data.
Tom Kendall, P.E.
920-755-7661
<<Flow Liimiting Orifice Design.xls>>
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, I Kenneth O'Brien - Flow Liimiting Orifice Design.xls I
Upstream Pressure Downstream Pressure Vapor Pressure Pipe ID Required Flow Minimum orifice size Stage #
Pu 1
140(
2 922 3
463 4
241 5
143 6
90 7
60 8
42 9
31 d (in) 0.4375 0.3125 0.375 0.375 0.4375 0.4375 0.5 0.5625 0.5 n
1 2
2 3
3 4
4 4
5 P
0.230 0.164 0.197 0.197 0.230 0.230 0.263 0.296 0.263 C
dh (ft) dP (psid)
Pd 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 1105 1061 512 227 123 69 40 25 26 478 459 221 98 53 30 18 11 11 922 463 241 143 90 60 42 31 20 ar 0 crtical 1.92 1.00 1.07 1.41 1.61 1.86 2.18 2.49 1.43 0.91 0.64 0.76 0.76 0.91 0.91 1.08 1.27 1.08 1400 psia 25 psia 4 psia 1.9 inches 75 gpm 0.25 inches
Ratio 2.12 1.55 1.40 1.84 1.78 2.06 2.03 1.96 1.33
--/
Critical Cavitation Index Critical Cavitation Index P
0.2 0.3 0.4 0.5 0.55 0.6 0.65 0.7 0.75 0.8 0.85 0.9 0
0.2 (T
0.08 0.14 0.225 0.375 0.47 0.58 0.72 0.92 1.25 1.6 2.3 3.8 4
3.5 3
c 2.5 E
2
"'1.5 1
0.5 0
0 crdtlcal 2
lilLY 0.4 0.6 Beta 0.8 1
/
i = 0.027SW a15oa