ML20104B859
| ML20104B859 | |
| Person / Time | |
|---|---|
| Site: | 05200001 |
| Issue date: | 07/23/1992 |
| From: | Fox J GENERAL ELECTRIC CO. |
| To: | Chet NRC |
| Shared Package | |
| ML19303F076 | List: |
| References | |
| NUDOCS 9209160281 | |
| Download: ML20104B859 (2) | |
Text
--__.
y,\\
Memo imm: ;
J. M. FOX
_[
.o
/.
W
!asart wc w
'w',
cb e+ -
i G we\\ os c J
~b.
ca P' "
of RTP ek xk a 4h cs b To w-
- M uv-\\<g w w s \\ o ok'w) Sor em J I 4 k wk.
G e o-g <
\\
h
- w cl v 3 Th omm s s3 T sm+ 4\\m s w e beca-w of OF+L 700- q u\\,
4 k -Ps $ w w.'
J c~ t h GENuclearEnergy 9209160281 920723 DR ADOCK 05200001 PDR f
ha'$-!
gy }
i g
[y>
p
_020058
[]gye ptgiwit y"/K 3k khw,G /
8 9
10 and 9 Reactor internal Pumn (RIP) Operation Toshiba's teu data of 10 Reactor Internal Pump (RIP) and 9 RIP operations are shown in the attached Fgures 3 &d o c2inerem measurement configurations (labelled as " Pump Deck AP" and " Proposed AP") were tested and !he data as obtained. The pump Deck AP is measured by pressure sensing lines with taps located above and below the pump deck (See Figure 1). The " Proposed AP" method, which is now in the ABWR design, is measured by sensing lines with upper taps upstream of the pump deck, and lower taps inside the shroud (See Figure 2). The first method tends to measure the local conditions while the second method measures the average condition after lower plenum mixing. Figure 3 shows that with 10 RIP operation, the AP measured by Pump Deck AP method is Ductuated due to the pump operation, while the AP measured by the second method shows a uniform Dow distribution. For 9 RIP operation as shown in Figure 4, the pump AP measurement shows that there is significant flow pertubration due to the idle RIP. But the second Row measurement shows the Dow is uniform. This is due to the lower plenum Dow mixing. Therefore,it is concluded that the now distribution to the reactor core is still uniform even if one RIP is idle.
t