ML19256G250
| ML19256G250 | |
| Person / Time | |
|---|---|
| Site: | Point Beach  |
| Issue date: | 12/19/1979 |
| From: | Fay C WISCONSIN ELECTRIC POWER CO. |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7912280550 | |
| Download: ML19256G250 (2) | |
Text
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O wisconsin Electnc ecua couraur 231 W. MICHICAN, P.O. BOX 2046. MILWAUKEE, WI 53201 December 19, 1979 Mr.
H.
R.
Denton, Director Office of Nuclear Reactor Regulation U.
S. NUCLEAR REGULATORY COMMISSION Washington, D.
C.
20555 Attention:
Mr. A. Schwencer, Chief Operating Reactors Branch #1 Gentlemen:
POINT BEACH UNIT 1 CYCLE 8 STARTUP PHYSICS TESTING - ROD WORTH MEASUREMENTS REPORT The Unit 1 beginning of Cycle 8 rod worth measurements utilizing the rod swap method were conducted on November 27, 1979.
This report is submitted in compliance to the criteria stated in Mr. Schwencer's April 10 letter to Mr. Sol Burstein.
The equation and equation variable definitions used in calculating the rod worths are as follows:
Wf = W' - Ap1 - (a..)
( Ap2)
+W where:
E X
Wf=TheinferredworthofBankX, pcm 4
W
= The measured worth of the reference bank, Control A, R
from fully withdrawn to fully inserted with no other bank in the core.
= A design correction factor taking into account the fact ax that the presence of another control rod bank is affecting the worth of the partially inserted reference bank.
Ap2 = The measured worth of the reference bank from its elevation, at which the reactor is just critical with Bank X in the core, to the reference bank fully withdrawn condition.
This worth of the reference bank is measured with no other bank in the core.
Therefore, the a correction
- h 0/
factor is used.
1653 279 s
//c 7912280 f f O P
's Mr. H.
R.
Denton December 19, 1979 Apl = The measured worth of the reference bank from the fully inserted condition to the elevation at which the reactor was just critical prior to the worth measurement of Bank X.
In the test 4p1 is zero.
W
= The worth of Bank X from the initial position (before the start of the exchange) to 228 steps.
This worth is measured by the normal endpoint worth method.
The following table displays the results of the rod worth measurements.
COMPARISON OF INFERRED / MEASURED BANK WORTHS WITH DESIGN PREDICTIONS UNIT 1 CYCLE 8 W (pcm)
W (pcm)
WX (Pem)
(%) *
- Bank X (pcm)
$x CC 923
.958 22 916 892
+2.7 SB 912 1.004 25 888 868
+2.3 SA 589 1.027 26 1200 1150
+4.3 CD 944 1.C13 21 843 842
+0.1 CB 1108 1.060 20 624 605
+3.1 CA 1778*
1692
+5.1 Total 6249 6049
+3.3 M
- W
= 1778 P
- (W
- w ) (100) where W is the predicted bank worth.
X X
X E
WX Design calculations were performed for BOL, HZP, 530'F, 1390 ppm.
Measured data were taken at BOL, HZP, 520*F, 1410 ppm.
As is evident from the above table, measured data adheres well to design predictions.
All review and acceptance criteria outlined in Mr. Schwencer's October 12 letter to Mr. Sol Burstein are satisfied.
Very truly
- ours, C. W.
Fay, Director Nuclear Power Department i653 2110