ML19220A869
| ML19220A869 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 10/28/1977 |
| From: | Herbein J Metropolitan Edison Co |
| To: | Varga S Office of Nuclear Reactor Regulation |
| References | |
| GQL-1484, NUDOCS 7904250051 | |
| Download: ML19220A869 (5) | |
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This addendu: is part of ARL Repor: Sc. eo-77/M20 FF, February 1977.
I a:P ifies and clarifies several itens in : hat reper: as well as correcting l
an error. The additional material is given by section below.
I:iTRODUCTIO:s The water levels, 236.0 ft and 289.0 ft, were assumed for test purposes.
Actual expected levels are given in the FSAR*.
RESULTS A'iD DISCL'SSIC:4 Loss Coefficients The abscissa of Figure 12 was incorrec:ly labeled.
The Reynolds number range was, in fact, frc: 0.3 x 10> :o 1.2 x 10>
These data were acquired for Scheme 2 fer both discharge lines withcut :he 7crtineter in place in order to cepare the lines with regard :: loss.
Scre da:a pertained to the con-dition of both lines operating simultaneously while other data were for :ha lines operating indivifuall;,
The ficw rate was varied in order to vary Reynolds numbers.
(L
re" sed Figure
'.2 is attached.
The abscissa has been corrected and the data separa:ed.
It can be seen that, as bef ore, the loss coefficient for
- .1, is higher than for line 2, K2.
4ith the lines operating
_:ne 1, Individually, il is about 25% higher than K2 at R = 0.3 x 10 with the dif f erence decreasing with increasing R, falling to 6% at R = 1.2 x 10'.
F;r both lines operating together, the difference is about 300 at the 1:wer R value falling to about 95 at the higher value. The difference ir less coefficients, thus decreases with R whether the lines are 2pera:ing
.ndividually or toge:her.
For Schene 12, a test was performed with :he upper 50% of :he screen flow area blocked, resulting in a loss coefficient for R = 1.9 x 10' of K2 = 0.53.
This is 2.11 higher than the curve of Figure 13 at the Reynolds nu ber or an increase of about 15%.
Since the prototype velocity head is about 1.05 ft, this represents an increase of 0.16 f: in head loss. The da:a points on 3
Figure 13 are all at ?
1, except those at R = 0.74 and 0.76 x 10, for
=
.hich F = 0.
, and : hat at R = 3.2 x 10', for which F 1.5.
=
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nere severe than type 3 is expected, :here will be no air entrainin; vortices.
The revised Figure 12 indicates tha: :he difference in loss coefficients wil_
- e _ess :han '0S a: high R rather :han 23% as indica:ed previcusi, 7.1 1C2
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