ML20210T980
| ML20210T980 | |
| Person / Time | |
|---|---|
| Site: | Mcguire, McGuire, 05000000 |
| Issue date: | 04/26/1984 |
| From: | Kitlan M DUKE POWER CO. |
| To: | |
| Shared Package | |
| ML20210T874 | List: |
| References | |
| PT--A-4150-11, PT-0-A-4150-11, TAC-62981, TAC-62982, NUDOCS 8702180360 | |
| Download: ML20210T980 (13) | |
Text
. _ - _ _ _ _ _
69557f04/ A Attachment 2 FOR INFORMAION ONtY l Form 34731 (10-81)
(Formerly SPD 10021 DUKE POWER COMPANY (1) ID No: PT/0/A/4150/11 PROCEDURE PREPARATION Change (s) 0 to PROCESS RECORD 3 Incorporated (2) STATION: McGuire (3) PROCEDURE TITLE: Control Rod Worth Measurement (4) PREPARED BY: Nt b. \ uhnDATE: 3 3D!64 (5) REVIEWED BY: \b6 DATE:
N,26 W ss Cross-Disciplinary Review By: N/R: b (6) TEMPORARY APPROVAL (IF NECESSARY):
By: (SRO) Date:
By: Date:
(7) APPROVED BY: m ), /M ,i Date: .,//2.4 /#
,. (8) MISCELLANEOUS:
t Reviewed / Approved By: Date:
Reviewed / Approved By: Date:
This copy has been compared with the Control Copy and is verified correct.
Initial Date kTime Y
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I 87021'80360 EI70211 PDR ADOCf\ 05000369 p PDR
- PT/0/A/4150/11-Page 1 of 5 DUKE. POWER COMPANY
.- McGUIRE NUCLEAR STATION CONTROL R0D WORTH MEASUREMENT 1.0 Purpose 1.1 To measure the differential. and -integral worth of 'any of the Controlling Banks or Shutdown Banks.
1.2 To measure the differential boron worth over the range being tested.
2.0 References 2.1 Rod and Boron Worth Measurements During Boron Dilution, -
j DAP/DBP-SU-7.4.
3.0 Time Required 3.1 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />, 2 engineer for each Rod Bank-measured.
j 4.0 Prerequisite Tests ,
- None
- 5.0 Test Equipment 5.1 Reactivity Computer (with flux signal from top and bottom of one power range channel).
5.2 Two pen strip chart recorder with reactivity and T,yg signals.
5.3 Two pen strip chart recorder with pressurizer water level and flux signal.
4 6.0 Limits and Precautions 6.1 The NC System temperature is controlled preferably by secondary i steam bypass to the condenser or by secondary steam dump to the j I
atmosphere. Temperature control may alternatively by affected 1
by steam generator blowdown.
6.2 Normally all reactor coolant pumps should be operating for maximum mixing in the NCS. If all reactor coolant pumps are not i
operating, the operating pumps should be those on the NCS charging loops (A&D). See Tech Spec 3.4.1.1 and 3.10.4 if all reactor coolant pumps are not operating.
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- ' PT/0/A/4150/11 Page 2 of'5 6.3 The rod insertion limit will be violated during this test. The operators should be made aware in advance and should anticipate the associated alarms. Technical Specification 3.10.3 allows for this.
6.4 Chart speeds for rod worth measurements should be about .-2 to 1 in./ min. The sawtooth of the reactivity trace should be kept at about a 45' angle.
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 required testing range.
/____ 7.2 Record in the log the unit to which this test applies.
8.0 Prerequisite System Conditions
/ 8.1 The reactor coolant system pressure is at 2235 150 psig.
NOTE: Maintain NCS pressure within t25 psig of established pressure during the test.
/ 8.2 The reactor coolant system temperature is 557'E +1, -5 F.
NOTE: Maintain NCS temperature within t1*F of established i temperature during the test.
/ 8.3 T' pcm =ditzes sycqy control is in-manu:1 *aith spray flow 4
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/ 8.4 Test equipment is set up per Section 5.0.
/ 8.5 The unit is sufficiently stable as determined by the test coordinator.
/ 8.6 The indicated core reactivity is less than ti pcm. l
/ 8.7 Record the requested data on Enclosure 13.1 for this step.
/ 8.8 The Control Rods are positioned as specified by the Test Coordinator.
/ 8.9 Complete Enclosure 13.4 only if no overlap data is to be taken.
Mark this step, Step 8.9.1, and Enclosure 13.4 N/A if overlap (
data is to be taken.
/ 8.9.1 Bank selector switch is positioned in bank select to the bank being measured if 8.9 is not N/A.
PT/0/A/4150/11-Page 3 of 5
/ 8.10 Complete Enclosure 13.5 only if overlap data is to be taken.
Mark this step, Step 8.10.1 and Enclosure 13.5 N/A if this is not the case.
/ 8.10.1 Bank select switch is in overlap (manual) unless 8.10 is N/A. >
9.0 Test Method With the RCCA's positioned as requested by the Test Coordinator, the amount of demineralized water / boric acid required to compensate for the forthcoming configuration adjustment is determined. A continuous boron concentration change is initiated at a rate of approximately 500 pcm/hr. The RCCA's are moved in discrete increments to compensate I
for the change in boron concentration. From the data gathered, the differential and integral worth of RCCAs being measured is determined.
10.0 Data Required 10.1 Rod positions and reactivity will be recorded on Enclosure 13.1.
10.2 The following data should be recorded on the. strip charts: !
(attach charts to this procedure) l 10.2.1 RCCA positions before and after each discrete increment. !
10.2.2 Parameter scale and chart speed should be written on i the chart.
10.3 Plot of integral and differential rod worth on Enclosure 13.2.
10.4 Predicted data on Enclosure 13.4.
4 11.0 Acceptance Criteria 11.1 The rod worth of the rod or bank being measured is within 110%
of the predicted rod worth as given on Enclosure 13.4.
11.2 The integral rod worth of Control Banks A, B, D, D in overlap is
- within 14% of the total measured values of Control Banks A, B, C and D individually as given on Enclosure 13.5. This only fi applies if overlap data is to be taken.
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- PT/0/A/4150/11 Page 4 of 5 12.0 Procedure Initial /Date NOTE: The following ' steps explain the general method for performing rod worth measurements for single RCCA's, Groups of RCCA's, or Banks of RCCA's during either dilution or boration.
/ 12.1 Verify that the strip chart recorders specified in Section 5.0 are operable and set up as required.
/ 12.2 Determine the amount of demineralized water / boric acid to compensate for the required configuration adjustment. See.
Enclosure 13.3 for an example of how to determine this.
/ 12.3 Record the beginning boric acid and primary water integrator values in the test log. If possible, reinitialize readings to 0.0.
/ 12.4 Using the reactivity computer, measure the worth of the back being tested from its current position to the fully withdrawn / Inserted position. Record the data on Enclosure 13.1.
i NOTE: This is nimilar to a Boron Endpoint Measurement.
/ 12.5 Using the number obtained in Step 12.2, initiate the required I boron concentration change at a rate which will not cause a I reactivity rate of change of >500 pcm/hr.
NOTE: This guideline corresponds to a dilution rate of approximately 2500 gallons per hour (40 GPM) or a boration rate of approximately 250 gallons per hour (4 GPM) of 4 w/o boric acid. See Enclosure 13.3 for an_ example of this.
/ 12.6 Insert / withdraw RCCA's in discrete increments in order to j
compensate for dilution /boration. These increments should be limited such that the resultant reactivity change are within the guidelines of approximately t20 pcm. During these measurements, record all relevant data on the strip charts in use. See Section 10.2.
/ 12.7 Terminate the boron concentration change such that the desired rod configuration is achieved.
NOTE: A delay of some minutes (typically 15 minutes) is unavoidable between termination of the transient and f 1
i stabilization. This delay should be anticipated.
i
- PT/0/A/4150/11 Page 5 of 5 NOTE: Normally the desired rod configuration will be either overshot or undershot. The Test Coordinator must evaluate the effects of this situation on the results of the affected test. '
If effects are unacceptable, the Test Coordinator can repeat Steps 12.2 through 12.5 to correct the situation. ,
NOTE: If there is any overshoot, the bank selector switch may be changed to the next bank, e NOTE: For rod swap measurements, terminate the boron concentration change such that the final position of the bank is almost to the fully inserted position.
/ 12.8 Using the reactivity computer, measure the worth of the bank being measured from its current position to the fully inserted / withdrawn position. Record the data in the test log for later entry into Enclosure 13.1. Mark this step as N/A if this data is already obtained (i.e., overshoot to next bank). ,
' NOTE: This is similar to a Boron Endpoint Measurement.
l / 12.9 Record the final primary water and/or boric acid integrator j values in the test log.
/ 12.10 Record the " FINAL" data requested on Enclosure 13.1.
/ 12.11 After the test is over, record the required data on t
Enclosure 13.1 from the strip charts.
/ 12.12 Verify the acceptance criteria has been met.
/ 12.13 Using the data on Enclosure 13.1, complete the plot (s) on Enclosure 13.2.
/ 12.14 In the log, calculate the differential boron worth over the bank being measured by dividing the measured rod worth by the difference in boron concentration over the rod worth measurement.
13.0 Enclosures 13.1 Rod Worth Measurement Data Sheet 13.2 Rod Worth Curves 13.3 Example of Determination of Dilution Rate 13.4 Predicted Rod Worth Data j
13.5 Rod Worth Data if Worths in Overlap are to be Taken I
PT/0/A/4150/11 Peg 2 1 of 2 Control Rod Worth Measurement-Enclosure 13.1 Rod Worth Measurement Data Sheet Step 8.7 McGuire Unit Cycle Bank or RCCA Identification Boration DilutionC (Check one)
Date Power (amps)
A C D E Initial Shutdown Bank Positions:
B D
Initial Control Bank Positions: A B C Overlap Measurement (yes or no)
Initial Final -(Step 12.10)
NCS Boron Concentration (ppm):
Pressurizer Boron Concentration (ppm):
NCS Temperature (T, ) F:
NCS Pressure , psig :
Step 12.9 RCC Position (Steps Withdrawn) Delta H Reactivity (pcm) {
Initial Final Average (ah) ao E ac do/4h I, i'
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PT/0/A/4150/11 Page 2 of 2 Control Rod Worth Measurement Enclosure 13.1 Rod Worth Measurement Secp 12.9 (continued) Data Sheet
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PT/0/A/4150/11 Page 1 of-1
^
Control Rod Worth Measurement Enclosure 13.3
- Example of Determination of Dilution Rate (Illustration Purposes Only)
^
It is desired to dilute Control Bank B from 223 to 0 steps at a rate not to exceed 500 pcm/hr.
i
- 1. The starting point is known: Initial Boron Concentration is 1130 ppa..
- 2. Go to Figure A.3 in the Core Design Report (or any other applicable document). The Integral Rod worth for Control Bank B from 223 to 0 is 909 pcm.
- 3. Go to Curve 6.2 in the Data Book at 1130 ppm BOL and get -10.7 pcm/ppe for l the differential boron worth.
- 4. 990 pcm + 10.7 pcm/ ppm = -92.5 ppm change (dilute) l
{ 5. 1130 ppm - 92.5 ppm = 1037 ppm ending boron concentration.
- 6. Go to Figure 5.1 in the Data Book. To go from 1130 to 1037 ppe, add about 5656 gallons of demineralized water.
i j 7. An alternate method is to use the Boron Predict Program on the OAC.
i'
- 8. The maximum rate is 500 pcm/hr; therefore:
5656 sal. 500 pcm 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> = 47.6 gpm l x
[ 990 pcm hour 60 min.
- 9. To be conservative, go at 45 gpm. .
- 10. Expect the time for the rod worth measurement to be t
990 pcm 22 hours2.546296e-4 days <br />0.00611 hours <br />3.637566e-5 weeks <br />8.371e-6 months <br /> j 500 pcm/hr 1
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- PT/0/A/4150/11
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Pag 2 1 of 1 Control Rod Worth Measurement Enclosure 13.4 Fredicted Rod Worth Data Step 8.9 Complete one of the following two lines. Mark the other N/A.
Bank Being Measured (i.e., Control / Shutdown)
Rod Being Measured Predicted Rod Worth Value for the above condition.
pcm 110%
OR pcm t pcm This information was transmitted to McGuire Nuclear Station by/in (list reference):
Reason for this test (refueling, etc.):
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Recorded By Date McGuire Unit
. Cycle l
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PT/0/A/4150/11 Pzga 1 of 1 4-Control Rod Worth. Measurement Enclosure 13.5 Rod Worth Data if Worths in Overlap are to_be Taken I
4 Step 8.10 Individual-Measured Rod Worth Values (not in overlap): -
Control Bank A pcm Control Bank B 'pcm Control Bank C pcm Control Bank D pcm i
Sum of Control Bank A, B, C and D individual rod worths: pcm'14%
OR pcm pcm i
f' The above individual measured rod worth values were obtained from (list procedures):
which were performed on (list dates):
i d
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I 4 Recorded By
-Date McGuire Unit Cycle i
. . . . _ . + , , , _ , . . _ _ _ , . , . . _ _ . - . . . , _ _ - , . . . - . . , , _ . _ . , _ . , , _ .
FCrm 34,805 (741) Sheet of Procedure No. PT/CI4lWSO/il l
Test Logger DUKE POWER COMPANY kOw rE NUCLEAR STATION TEST LOG Remarks initial Date Time l
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