ML20210U020
| ML20210U020 | |
| Person / Time | |
|---|---|
| Site: | Mcguire, McGuire, 05000000 |
| Issue date: | 01/29/1987 |
| From: | Killer M, Kunks L DUKE POWER CO. |
| To: | |
| Shared Package | |
| ML20210T874 | List: |
| References | |
| PT--A-4150-11A, PT-0-A-4150-11A, TAC-62981, TAC-62982, NUDOCS 8702180368 | |
| Download: ML20210U020 (19) | |
Text
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(1) 10 No PT/0/A/4150/1L Form 34731 (R8 85) i 6r inCcroor3ted PR EPAR ATION (2) STATION WC"fra (3) PROCEDURE TITLE control Rod Worth Measurement!
Rod Swan O/MM h
OATE (4) PREPARED BY LL DATE S /d (5) REVIEWED BY N/R I
Cross Disciplinary Rev By
- 6 -
(6) TEMPORARY APPROVAL (if Necessary)
By (SROI Date Date By d
(7) APPROVED BY DATE
/
/
(8) MISCELLANEOUS Reviewed / Approved By Date Rev'ewed/ Approved By Date (9) COMMENTS (For procedure reissue indicate whether additional changes, otner t9an previously aporoved changes, are included.
Attaen additiorial pages,if necessary.)
2 ADDITIONAL CH ANGES INCLUDED.
COMPLETION II (101 COMPARED WITH CONTROL COPY
% M i ft4u 4-DATE (11) D ATE (S) PER FORMED 112) PROCEDURE COMPLETION VERIFICATION Z Yes Z N/A Check lists and/or blanks property initialed, sigr'ed, dated or filled in N/A or N/R, as appropriate?
Z Yes C N/A Listed enclosures attached?
Z Yes Z N/A Data sheets attaened, completed, dated and signed?
Z Yes C N/A Charts, graphs, etc. attacned and properly dated, identified and marked?
2 Yet 2 N/A Acceptance criteria met?
VERIFIED SY DATE (13) PROCEDURE COMPLETION APPPOVEO DATE (14) REMARKS (Attach additional pages. if necessary.)
g h
8702180368 870211 FEB 3 19 87 PDR ADOCK 05000369 p
PDR ri've DOWFR CO.
PT/0/A/4150/11A Page 1 of 12 t
a DUKE POWER COMPANY McGUIRE NUCLEAR STATION CONTROL ROD WORTH MEASUREMENT:
ROD SWAP.
1.0 Purpose 1.1 To verify that the reactivity worth of the Reference RCC bank, as determined through reactivity computer measurement data, is consistent with design predictions.
NOTE: The refSrence RCC bank is the bank which has the 4
predicted highest reactivity worth of all control and shutdown banks when inserted into an otherwise unrodded core.
1.2 To verify that the reactivity worth of each control and shutdown bank (except the reference bank), as inferred from data following iso-reactivity interchange with the reference bank, is consistent with design predictions.
2.0 References 2.1 Rod Bank Worth Measurements Utilizing Bank Exchange, WCAP-9863-A, May 1982.
2.2 Control Rod Worth Measurement, PT/0/A/4150/11 2.3 Post Refueling Controlling Procedure for Criticality, ZPPT, and Power Escalation Testing, PT/0/A/4150/21 2.4 Technical Specifications 3.4.1.1, 3.10.4, 3.10.3, and 3.10.2.
3.0 Time Required 3.1 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />, 1 engineer j
4.0 Prerequisite Tests Initial /Date
/
4.1 PT/0/A/4150/10, ARO Boron Endpoint Measurement NOTE:
It is only necessary to obtain a value for ARO Boron Endpoint.
5.0 Test Equipment 5.1 Reactivity Computer (with flux signal from top and bottom of one power range channel).
l 4
9 g--m
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'PT/0/A/4150/11A Paga 2 of 12 5.2 Two two-pen strip chart recorders. 'One chart recorder s'hould have reactivity (on a scale of 10 pcm/ inch, with 0 pca'being the center of the recorder sheet) and T from one-loop _(on a scale of l'F/ inch for 556 to 558*F set up on one side of the recorder sheet). The _other chart recorder should have flux (on a scale of 0 to the top end of the testing decade.in-amps)~and pressurizer level (on a scale of 10% level / inch). Chart speeds should be 1 inch / min.
NOTE: The specifications in this step may be altered by the
~
Test Coordinator as necessary to accommodate equipment limitations, as long as all four signals are recorded or trended.
6.0 Limits and Precautions 6.1 The NC system temperature is controlled. preferably by steam dump to the condenser. Temperature control may alternatively be affected by steam generator blowdown.
.I i
6.2 Normally all reactor coolant pumps should be operating for maximum mixing in the NCS.
If all reactor coolant pumps are not operating, the operating pumps should be those en the NCS charging loops (A and/or D).
See Tech Spec 3.4.1.1 and 3.10.4 if all reactor coolant pumps are not operating.
6.3 The rod insertion limit and bank overlap sequence will be violateel during this test. The operators should be made aware in adva1ce and should anticipate the' associated alarms.
Technical Specification 3.10.2 and 3.10.3 allows for this.
6.4 Maintain the flux level in the zero power test range established in Reference 2.3.
6.5 Prior to switching the rod control selector switch from one bank to another, verify both groups of the bank (if the bank has two groups) are at the same position in order to avoid group misalignment.
PT/0/A/4150/11A Page 3 of 12 l
9 7.0 Required Unit Status Initial /Date.
/
7.1 The unit is just' critical in the Startup Mode (Mode 2) at zero power with the flux level in~the zero power test range established in PT/0/A/4150/21, " Post Refueling Cr.ntrolling Procedure for Criticality, ZPPT, and Power Escalation Testing."
/
7.2 Record in the log the unit and cycle to which this test applies.
8.0 Prerequisite System Conditions NOTE: The following steps may be signed off in any order.
/
8.1 The reactor coolant system temperature is 557'T +1, -5'F.
NOTE: Maintain NCS temperature within 11*F of established.
temperature during the test.
4
/
8.2 The difference between NC loop, pressurizer, and VCT boron concentrations is less than 20 ppe. List on Enclosure 13.3.
j NOTE:
Do not use the boronometer.
Boron samples are desirable but are not necessary for completion of test. Samples may be waived if reason is logged in the test.
I log.
Samples may be taken during the data taking at the test i
coordinator's request.
)
/
8.3 Xenon worth rate is changing less than t.1 pcm/ min.
1
/
8.4 Test equipment is set up per-Section 5.0.
/
8.5 All available pressurizer heaters are on as needed, in order.to improve mixing by maximizing the pressurizer spra'y.
/
8.6 All control and shutdown banks are fully withdrawn except' Control Bank D which is at a position greater than about 215
)
steps withdrawn.
/
8.7 The Rod Control Selector switch is in Bank Select-Mode set on i
Control Bank D.
/
8.8 Complete Enclosure 13.1 with the predicted data. See Reference 2.3, Enclosure 13.8 for banks to be measured.
See Enclosure 13.2 for an explanation of nomenclature used in this test.
NOTE:
If any banks are not being measured mark the blanks on i 3.1 N/A.
l i
i
PT/0/A/4150/11A Page~4 of 12 9.0 Test Method
. The RCC bank with the highest predicted value of reactivity worth is measured using the dilution technique per PT/0/A/4150/11. This bank serves as a reference. The integral worth of the remaining RCC banks is implied from the difference in the critical rod position of the reference bank with and without the insertion of bank being tested.
The implied integral worths are then compared to predicted rod worths.
10.0 Data Required 10.1 The following conditions for the approximate time of criticality before each bank exchange, recorded on Enclosure 13.4:
Time Just critical height of reference bank 10.2 Nuclear design predictions on Enclosure 13.1.
10.3 Boron concentration information for the NCS and pressurizer on 3.3.
Boron samples are desirable but are not necessary for completion of test.
Samples may be waived if the reason is logged in the test log.
10.4 A copy of the rod positions and rod worths for the reference bank from Enclosure 13.1 of PT/0/A/4150/11 when this test is complete.
10.5 The calculated, implied integral worth (W ) for each RCC bank except the reference bank. List data on Enclosure 13.4.
10.6 The percent difference between inferred and predicted worths for each individual RCC banks (c ) and for the sum of all banks (c )
2 on Enclosure 13.5.
1
PT/0/A/4150/11A Page 5 of 12 11.0 Acceptance Criteria
- 11.1 The absolute value of the percent difference between measured ~
and predicted. integral worth for_the reference bank is $15%
q (from Enclosure 13.5 (c )1 515%).
3 11.2 From Enclosure 13.5, the calculated value c 510%.
2 4
11.3 For all RCC banks other than the reference bank; either:
a)
From Enclosure 13.5, c 530% for each bank or.
3x or Wf-W 5200 pcm for each bank, b) whichever is greater.
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J l
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rm - - -
.. -., ~
=,.. -.
PT/0/A/4150/11A
.~
Paga 6 of.12 i
12.0 Procedure Initial /Date NOTE: See Enclosure 13.2 for. an explanation of all nomenclature used i
in.this test.
12.1 Measure the integral reactivity worth of the reference bank as follows:
NOTE: The reference bank is defined as that bank which is predicted to have the highest worth, of all control and shutdown banks, when inserted.into an otherwise un-rodded core -(see
^
. 3.1 for the identity of.this bank). In this procedure, all banks will be referred to by the bank number,
.except the reference bank.
If the reference bank is currently l
positioned at less than 228 steps withdrawn (i.e., if it.is Control Bank D), continue with step 12.1.5.
Mark steps 12.1.1 to 12.1.4 NA.
If the reference-bank is positioned at 228 steps 4
e withdrawn, continue on at Step 12.1.1.
/
12.1.1 Insert the reference bank until the indicated reactivity is approximately -10 pcm.
/
12.1.2 Withdraw the bank inserted below 228 until the indicated reactivity-is approximately,+10 pcm.
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12.1.3 Repeat steps 12.2.1 and 12.2.2 until the previously I
inserted bank is fully withdrawn.
/
12.1.4 Adjust the position of the reference bank until the reactor is just critical. Record this position in-the I
test log.
l
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12.1.5 Perform Control Rod Worth Measurement per
.i PT/0/A/4150/11 on the reference Bank.
/
12.1.6 Attach a completed copy of PT/0/A/4150/11 Enclosure 13.1 to this procedure.
/
12.1.7 Record the total reference bank rod worth from PT/0/A/4150/11 Enclosure 13.1 on Enclosure 13.4 as shown.
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12.1.8 Ensure the reactor is critical at the same reference bank position as was obtained at the end of 4
PT/0/A/4150/11.
t-PT/0/A/4150/11A Page 7 of 12 12.2 Measure the reactivity worth of the remaining control and shutdown banks, relative to the reference bank, as follows:
NOTE: The relative worth of each RCC bank is obtained from the critical position of the reference bank (initially nearly fully-inserted) after full insertion of the bank being measured f
(initially fully withdrawn), at constant RCS boron concentration.
/
12.2.1 Record the initial critical bank configuration on (J) 3.4 for tiie reference bank.
2 3
4 5
6 7
8
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12.2.2 Insert bank 1 (identify this bank on top of Enclosure (J) 13.5; i.e., Bank 1 is S/D E or Cont. B, etc.) until 2
3 4
5 6
the reactivity indicated by the reactivity computer is approximately -20 pcm.
7 8
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12.2.3 Withdraw the reference Bank until the indicated (4) reactivity is approximately +20 pcm.
2 3
4 5
6 NOTE: Maintain the flux within the zero power test range established in Reference 2.4.
7 8
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12.2.4 Repeat Steps 12.4.2 and 12.4.3 until bank 1 is fully (J) inserted. Keep the indicated reactivity within 2
3 4
5 6
t20 pcm.
j 7
8 j
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12.2.5 Adjust the position of reference bank until the (J) reactor is just critical.
Record the final critical 2
3 4
5 6
configuration data on Enclosure 13.4.
7 8
/
12.2.6 Insert the reference Bank 1 until the indicated (J) reactivity is approximately -20 pcm.
2 3
4 5
6 l
l 7
8
d*
PT/0/A/4150/11A Paga 8 of'12
/
12.2.7-Withdraw bank 1 until the indicated reactivity is
(])
approximately +20 pcm.
2 3
4 5
6 7
8
/
12.2.8 Repeat Steps 12.'4.6 and 12.4.7 until bank I is fully 1-(/)
withdrawn.
4 2
3 4
5 6
7 8
/
12.2.9 Adjust the position of reference Bank until the (J) reactor is just critical. Record the critical 2
3 4
5 6
configuration data on Enclosure 13.4.
i I
7 8
/
12.2.10 Repeat Steps 12.4.2 through 12.4.9 for the remaining, unmeasured control and shutdown banks numbered 2 through 8 instead of bank 1.
Identify the bank beside the bank number on Enclosure 13.4.
f NOTE:
If any banks are not being measured mark the blanks on Enclosure 13.4 and the check off blanks in -
sten 12.4.2 throuah 12.4.9 N/A.
/
12.3 Have Chemistry take a NC & pressurizer boron sample and write I
the results on Enclosure 13.2.
NOTE: The test may continue while waiting for the boron samples.
NOTE: This completes the data acquisition section of the test.
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/
12.4 Compute the average of the reference bank critical position on 3.4.
6?. 4 O'
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+ ---
- ---**----*---%v--
" i- - - - -
PT/0/A/4150/11A Paga 9 of 12 12.5 Compute the inferred worth for each control and shutdown bank (except the reference bank) as follows:
/
12.5.1 Using the data from Enclosure 13.4, and the worth measurement data for the reference bank from Enclosure 13.1 of PT/0/A/4150/11, compute the value of (ap )
as g
described below and record on Enclosure 13.4:
(h ) avg (ap )x
- W" l
o where:
(h )o avg W
is the measured integral worth of the reference bank from
<o 0-steps to (h ),,y from 3.1.of PT/0/A/4150/11.
NOTE:
Linearly interpolate if (h ), avg does not correspond to the steps on Enclosure 13.1 of PT/0/A/4150/11.
M and (h ), avg is the average of the initial and return critical positions of tLe reference bank before and after interchange with bank'x 's given on Enclosure a
13.4.
)
J e
k l
s e
5 r
v-
PT/0/A/4150/11A
- Pega 10 of 12
/
12.5.2 Using the data from Enclosure 13.4, the worth measurement data for the reference bank from 3.1 of PT/0/A/4150/11 and the design data x (OP )x **
of Enclosure 13.1, compute the value of a 2
described below and record on Enclosure 13.4:
228 2)x * "x M
ax h
is the measured integral worth of the d
h reference bank from h to the fully withdrawn position'from PT/0/A/4150/11, 3.1.
Linearly interpolate if M
h does not correspond to the steps on PT/0/A/4150/11 Enclosure 13.1.
M h,
is the measured critical position of the reference bank after interchange with bank x from Enclosure 13.4.
and o
is a correction factor from Enclosure 13.1 g
to account for the influence of bank x on the worth of the reference bank.
8 h
W[
%OD O
w h Wm t c.k ow iM N 9e.b. got uh 3 ms d *'3 13.4 4.phu cx, (4), Qtw NVE.
o-Won 13.4.
4 PT/0/A/4150/11A Paga 11 of 12
/
12.5.3 Compute the inferred integral worth of each bank x, I
W, as described below and record on Enclosure 13.4:
x I = [R - (ap )x-a (ap )x W
1 x
2 x
where:
is the measured total integral reference bank worth from PT/0/A/4150/11 3.1.
(ap )x is from-step 12.5.1.
l and a,(ap )x is fr a step 12.5.2 2
s NOA: M 6(ab W3 me4 W a wh pb.,
t% osanaur. - h ca v. u.,c,em 3 co.y te., ts,
of
+%
haL %
ChOb g {pfg f. g 73 we, t >-
Mm s (3 b W% VE 5%m on 3
gg 3,+
.m u.-
~,%
m%
was i 3.4 c4 w (b w 94 m
McM (hg,h o, Mc54 M W (cvaa 13.t.
.PT/0/A/4150/11A Pega 12 of 12'
/
12.5.4 Compute the percent difference between inferred and predicted worths for each individual RCC bank and the sum of a11 banks _ described below.
wIWP x 100, in %
(e )g =
p g
x P
I WI-I W 1
i i=1 i=1 x 100, in %
g,
2 N
V'i I
i=1 Fill in all blanks and summarize the calculations on 3.5.
/
12.6 Verify all acceptance criteria have been met.
13.0 Enclosures 13.1 Nuclear Design Predictions for Rod Interchange Measuremen'ts 13.2 Nomenclature 13.3 Log of Boron Concentrations 13.4 Critical Configuration Data 13.5 Comparison of Inferred Bank Worths with Design Predictions 13.6 Letter on Rod Swap i
i
PT/0/A/4150/11A Pega 1 of I Control Rod Worth Measurement: Rod Swap 3.1 Nuclear Design Predictions for Rod Interchange Measurements McGuire Unit Cycle (b)
(c)
Bank Bank W
h a
No.
Identity (x)
+
(pcm)
(steps)
(a)
Reference 1
2 e
3 i
5 7
8 (a) Reference bank - the bank with the highest predicted integral worth.
(b) Reference bank critical position after interchange with bank x.
(c) Ratio of integral worth of the reference bank from h to the fully withdrawn position with and without x in the core.
Control Bank C, Shutdown Bank E, etc.
+
NOTE: See Enclosure 13.2 for a complete listing of nomenclature used in this test.
Date Recorded By This data came from (list source):
PT/0/A/4150/11A Pag 2 1 of 1 Control Rod Worth Measurement: Rod Swap 3.2 Nomenclature
/
Predicted reactivity worth of each control and shutdown bank 1.
when inserted individually into an otherwise unrodded core.
2.
W The calculated, implied rod bank worths of bank x from rod exchange 3.
Measured rod bank worth of reference bank A correction factor which accounts for the effect of bank x 4.
a on the partial integral worth of the reference bank, equal tg the ratio of the integral worth of the reference bank from h*
to the fully withdrawn position with and without x in the Core.
5.
(Ap),
The measured integral worth of the reference bank from h to the fully withdrawn position.
6.
h' The predicted critical position of the reference bank after interchange with bank x starting with reference bank at 0, bank x fully withdrawn.
7.
h The measured critical position of the reference bank after interchange with bank x.
.. _ (h ),
,y Is the measurgd integral worth of the reference bank from 8.
I O steps to (h ),
,y
o 9.
(h")
Is the average of the initial and return critical positions
- 8 of the reference bank before and after interchange with bank x.
1 228 10.
W" Is the measured integral worth of the reference bank from h"*
E" to the fully withdrawn position.
h l
i d
PT/0/A/4150/11A Pcg21 of 1 Control Rod Worth Measurement: Rod Swap 3.3 Log of Baron Concentrat' ions NCS Boron Concentrations Recorded Time Date Sample Taken
+VCT NCS Press.
Comments By l
1 McGuire Unit Cycle NOTE: VCT sample needed only once at start of the test.
Mark this block as N/A after this.
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!cg2 1 of I Control Rod Worth Measurement: Rod Swap Encl'osure 13.5 Comparison of Inferred Bank Worths With Design Predictions Unit Cycle Date
++ I Bank (x)
W WP g )x x
x 1
No.
Ident.
(pca)
(pca)
(%)
+
reference 1
2 t
4 5
6 7
8
[W (Pca)
(pca) c2 (%)
1
+Stcp 12.2.7:
Record the measured worth of the reference bank here.
- feco Enclosure 13.1
++from Enclosure 13.4 Recorded By Date Checked By Date m.
y
,-,my- -..
Yt/v/A/ m u/114
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Enclo mre 13.6 Letter Rod Swap Paga 1
- t r' LANSFDRD.F.L (WE31974) Pccteds W3d 10
.pe-45 9:03 EOT Cyc 43-Information for Mike Kitlin l Subjects Rod Swap John, please forward this to Mike Kitlan.
- MikO, Thio is to docueent our telecon on 4/9/05 on the actions to be taken when the test bank could be worthore than the ref erence bank for the When this occurs, the following Rod Swap bank worth measurement.
Aninto should be noted:
- 1) Do not change the reference bank designation.
- 2) Exchange the highest worth test bank last.
With the ref erence bank fully out and the test bank nearly
- 3) fully inserted, measure the remaining worth of the test bank by one of two methods.
a) Perform an " endpoint type" maneuver and insert the test bank from the critical position to zero steps and measure the reactivity worth using the reactivity computer.
b) If the remaining worth of the test bank is larger than approximately 50 pcm, then dilute the test bank in from the critical position to zero steps and measure the reactivity worth using the reactivity computer.
This will render the measurement of the Just critical position of the ref erence bank alone after the swap N/A.
- 4) The worth of the test bank will be equal t).the total worth of i.ng worth of the the refeeence bank plus the measured remat i
test bank minus the worth of the reference bank from just critical to zero steps.
Or in equation fe.n:
WX = WR + WE - WRo where WX is the worth of the test bank, WR is the total worth of the eference bank, WE is the remaining worth of
.he test bank with the reference bank fully o..thdrawn, and WRo is the worth of the refer. ce bank from the just critical position to -ully inserted (Delta-Rho-1 in the procecare).
Note that Alpha-9 times Delta-Rho-2-x (procaduce notation) is not used since Delta-Rho-2-x is zero.
H:pOfully this meets your documentation requirements for this unique pecblem.
Also note that this was done at Zion last year without any pecblems.
- Regrrds, L. R. Grohmyer We:tinghouse NTD Nucicar Operations 4
__m,...