ML20111B267
| ML20111B267 | |
| Person / Time | |
|---|---|
| Site: | Byron  |
| Issue date: | 05/08/1996 |
| From: | Graesser K COMMONWEALTH EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| BYRON-96-0112, BYRON-96-112, IEB-96-001, IEB-96-1, NUDOCS 9605140303 | |
| Download: ML20111B267 (6) | |
Text
c Comntonwcalth IWiu>n Osmpany Ilyron Generating $tation 4 H0 North Gerrnan Church Road flyron,11. 610lO9791 Tcl#15 234 5141 May 8,1996 LTR:
BYRON 96-0112 FILE:
1.10.0101 U. S. Nuclear Regulatory Commission Washiagton, D.C 20555-0001 Attention:
Document Control Desk
Subject:
Report on Timed Rod Drop Testing and Drag Force Testing Byron Nuclear Power Station, Units 1 and 2 NRC Docket Numbers: 50: 454 and 455
References:
1.
NRC Bulletin (NRCB) 96-01, " Control Rod Insertion Problems," dated March 8,1996.
2.
Letter from J. B. Hosmer (Comed) to U.S. Nuclear Regulatory Commission transmitting Comed's response to NRCB 96-01, dated April 4,1996.
In Reference 1, the Nuclear Regulatory Commission (NRC) transmitted a request for input from holders of pressurized water reactor operating licenses regarding control rod insertion problems.
Comed's response to this Bulletin (Reference 2) committed to providing a report to the NRC within 30 days of any testing results for scheduled refueling outages. Byron Station commenced refueling outage B1R07 on April 5,1996. The requested timed rod drop tests (rod drop times and rod recoil confirmation) were performed. All rods dropped within Technical Specification time limits and demonstrated adequate rod recoil. The results of these tests are contained in the Attachment to this letter.
I affirm that the content of this transmittal is true and correct to the best of my knowledge, information and belief.
9605140303 960508
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PDR ADOCK 05000454 hI G
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^A linicom C4nnpany
USNRC document Control Desk May 8,1996 If you need any additional information concerning this report, please contact Scott Connelly, Lead Nuclear Engir.cer, at (815) 234-5441, extension 2284.
Sincerely, d
4 4
4 K. L. Graesser Site Vice President Byron Station Attachment ec:
G. Dick, Byron Project Manager-NRR H. Miller, Regional Administrator-Rill II. Peterson, Senior Resident Inspector-Byron 4
Oflice of Nuclear Safety-IDNS i
Subscribed and sworn before me on this S day of +\\ %
,1996 by OIu.e h mcu Notary Public l
+%1
RCCA Druc Times and Draa Forces Durino at End of Byron Unit 1 Cvele 7 No.
RCCA Fuel Drop Time Difference Drop Time Difference Adequate Maximum (n)
Location Assembly (to Entry from (Dashpot from Recoil Drag Forces Burnup into Average Entry to Average (Yes/No) during Dashpot)
Drop Time Full Dashpot Unlatching Insertion)
Time 1
H-08 46,994 1.575 0.035 0.440
-0.033 Yes 10 2
D-04 42,643 1.525
-0.015 0.480 0.007 Yes 10 3
F-08 42,634 1.555 0.015 0.525 0.052 Yes 30 4
H-10 42,626 1.560 0.020 0.510 0.037 Yes 25 5
K-10 42,441 1.545 0.005 0.445
-0.028 Yes 5
6 M-04 42,372 1.495
-0.045 0.490 0.017 Yes 10 7
F-10 42,332 1.580 0.040 0.490 0.017 Yes 15 8
C-05 42,240 1.520
-0.020 0.470
-0.003 Yes 15 9
N-05 42,148 1.520
-0.020 0.455
-0.018 Yes 5
10 H-06 42,126 1.525
-0.015 0.480 0.007 Yes 5
11 E-03 42,120 1.585 0.045 0.475 0.002 Yes 10 12 F-06 42,036 1.530
-0.010 0.460
-0.013 Yes 15 13 N-11 42,005 1.525
-0.015 0.475 0.002 Yes 5
14 M-12 42,000 1.615 0.075 0.370
-0.103 Yes 5
15 K-08 41,998 1.535
-0.005 0.525 0.052 Yes 15 16 D-12 41,988 1.625 0.085 0.390
.-0.083 Yes 15 17 L-03 41,929 1.545 0.005 0.480 0.007 Yes 10 18 K-06 41,724 1.510
-0.030 0.440
-0.033 Yes 5
19 E-13 41,662 1.575 0.035 0.490 0.017 Yes 15 20 C-11 41,655 1.560 0.020 0.480 0.007 Yes 15 21 D-08 41,429 1.535
-0.005 0.495 0.022 Yes 20 22 L-13 41,282 1.550 0.010 0.495 0.022 Yes 5
23 M-08 41,018 1.525
-0.015 0.480 0.007 Yes 10 24 H-12 40,995 1.515
-0.025 0.450
-0.023 Yes 10 25 H-04 40,923 1.530
-0.010 0.475 0.002 Yes 10 26 N-07 40,249 1.510
-0.030 0.470
-0.003 Yes 15 27 C-07 39,906 1.515
-0.025 0.465
-0.008 Yes 10 28 J-03 39,449 1.525
-0.015 0.470
-0.003 Yes 10 29 J-13 39,397 1.565 0.025 0.475 0.002 Yes 10 30 0-03 39,309 1.535
-0.005 0.495 0.022 Yes 10 31 N-09 39,198 1.525
-0.015 0.500 0.027 Yes 10 32 C-09 39,196 1.520
-0.020 0.450
-0.023 Yes 15 33 G-13 39,142 1.520.
-0.020 0.490 0.917 Yes 10 34 B-12 34,838 1.530
-0.010 0.500 0.027 Yes 15 35 M-02 34,671 1.580 0.040 0.490 0.017 Yes 5
36 D-02 34,513 1.555 0.015 0.500 0.027 Yes 15 37 P-04 34,452 1.505
-0.035 0.480 0.007 Yes 15 38 P-12 34,398 1.490
-0.050 0.435
-0.a38 Yes 10 39 B-04 34,372 1.510
-0.030 0.470
-0.00.,
Yes 15 40 D-14 34,196 1.575 0.035 0.485 0.012)
Yes 15 41 M-14 34,031 1.545 0.005 0.490 0.0171 Yes 5
42 B-10 21,231 1.525
-0.015 0.460
-0.013 Yes 20 43 P-06 21,097 1.500
-0.040 0.490 0.017 Yes 10 44 F-02 21,087 1.560 0.020 0.485 0.012 Yes 10 45 P-10 21,017 1.525
-0.015 0.450
-0.023 Yes 15 46 K-02 20,943 1.580 0.040 0.475 0.C02 Yes 10 47 B-06 20,941 1.505
-0.035 0.470
-0.003 Yes 5
48 F-14 20,721 1.605 0.065 0.475 0.002 Yes 10 49 K-14 20,613 1.540 0.000 0.455
-0.018 Yes 5
t 50 B-08 19,587 1.515
-0.025 0.480 0.007 Yes 15 1
51 P-08 19,071 1.545 0.005 0.450
-0.023 Yes 15 l
52 H-02 19,000 1.510
-0.030 0.460
-0.013 Yes 5
53 H-14 18,677 1.520
-0.020 0.475 0.002 Yes 5
Average Drop Time 1.540 0.473 j
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f-t Maximum Drag Force During Unlatching Versus Fuel Assembly Burnup
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5,000 10,000 15,000 20,000 25,000 30,000 35,000 40,000 45,000 50,000 Fuel Assembly Bumup (afWDitETU)
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e Difference from Average Dashpot Time Versus Fuel Assembly Burnup o 000 7_ _... _._ _ 7
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RCCA Droo Times and Drno Forces Durino at End of Byron Unit i Cycle 7 No.
RCCA Fuel Drop Time Difference Drop Time Difference Adequate Maximum (n)
Location Assembly (to Entry from (Dashpot from Recoil Drag Forces Burnup into Average Entry to Average (Yes/No) during Dashpot)
Drop Time Full Dashpot Unlatching Insertion)
Time 1
F-08 42,634 1.555 0.015 0.525 0.052 Yes 30 2
K-08 41,998 1.535 0.005 0.525 0.052 Yes 15 3
H-10 42,626 1.560 0.020 0.510 0.037 Yes 25 4
N-09 39,198 1.525
-0.015 0.500 0.027 Yes 10 5
B-12 34,838 1.530
-0.010 0.500 0.027 Yes 15 6
D-02 34,513 1.555 0.015 0.500 0.027 Yes 15 7
D-08 41,429 1.515
-0.005 0.495 0.022 Yes 20 i
8 L-13 41,282, 1.550 0.010 0.495 0.022 Yes 5
9 G-03 39,309 1.535
-0.005 0.495 0.022 Yes 10 10 M-04 42,372 1.495
-0.045 0.490 0.017 Yes 10 11 P-10 42,332 1.580 0.040 0.490 0.017 Yes 15 12 E 13 41,662 1.575 0.035 0.490 0.017 Yes 15 13 G-13 39,142 1.520
-0.020 0.490 0.017 Yes 10 14 M-02 34,671 1.580 0.040 0.490 0.017 Yes 5
15 M-14 34,031 1.545 0.005 0.490 0.017 Yes 5
16 P-06 21,097 1.500
-0.040 0.490 0.017 Yes 10 17 D-14 34,196 1.575 0.035 0.485 0.012 Yes 15 18 F-02 21,087 1.560 0.020 0.485 0.012 Yes 10 19 D-04 42,643 1.525
-0.015 0.480 0.007 Yes 10
.]
20 H-06 42,126 1.525
-0.01-0.480 0.007 Yes 5
21 L-03 41,929 1.545 0.005 0.480 0.007 Yes 10 4
22 C-11 41,655 1.560 0.020 0.480 0.007 Yes 15 23 M-08 41,018 1.525
-0.015 0.480 0.007 Yes 10 24 P-04 34,452 1.505
-0.035 0.480 0.007 Yes 15 25 B-08 19,587 1.515
-0.025 0.480 0.007 Yes 15 26 E-03 42,120 1.585 0.045 0.475 0.002 Yes 10 27 N-11 42,005 1.525
-0.015 0.475 0.002 Yes 5
28 H-04 40,923 1.530
-0.010 0.475 0.002 Yes 10 29 J-13 39,397 1.565 0.025 0.475 0.002 Yes 10 30 K-02 20,943 1.580 0.040 0.475 0.002 Yes 10 31 F-14 20,721 1.605 0.065 0.475 0.002 Yes 10 32 H 14 18,677 1.520
-0.020 0.475 0.002 Yes 5
33 C-05 42,240 1.520
-0.020 0.470
-0.003 Yes 15 34 N-07 40,249 1.510
-0.030 0.470
-0.003 Yes 15 35 J-03 39,449 1.525
-0.015 0.470
-0.003 Yes 10 36 B-04 34,372 1.510
-0.030 0.470
-0.003 Yes 15 37 B-06 20,941 1.505
-0.035 0.470
-0.003 Yes 5
38 C-07 39,906 1.515
-0.025 0.465
-0.008 Yes 10 39 F-06 42,036 1.530
-0.010 0.460
-0.013 Yes 15 40 B-10 21,231 1.525
-0.015 0.460
-0.013 Yes 20 41 H-02 19,000 1.510
-0.030 0.460
-0.013 Yes 5
42 N-05 42,148 1.520
-0.020 0.455
-0.018 Yes 5
43 K-14 20,613 1.540 0.000 0.455
-0.018 Yes 5
44 H 12 40,995 1.515
-0.025 0.450
-0.023 Yes 10 45 C-09 39,196 1.520
-0.020 0.450
-0.023 Yes 15 46 P-10 21,017 1.525
-0.015 0.450
-0.023 Yes 15 47 P-08 19,071 1.545 0.005 0.450
-0.023 Yes 15 48 K-10 42,441 1.545 0.005 0.445
-0.028 Yes 5
49 H-08 46,994 1.575 0.035 0.440
-0.033 Yes 10 50 K-06 41,724 1.510
-0.030 0.440
-0.033 Yes 5
51 P 12 34,398 1.490
-0.050 0.435
-0.038 Yes 10 52 D-12 41,988 1.625 0.085 0.390
-0.083 Yes 15 53 M-12 42,000 1.615 0.075 0.370
-0.103 Yes 5
Average Drop Time 1.540 0.473
-