ML20116E140
| ML20116E140 | |
| Person / Time | |
|---|---|
| Site: | Byron  |
| Issue date: | 07/29/1996 |
| From: | Kofron K COMMONWEALTH EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| BYRON-96-0210, BYRON-96-210, IEB-96-001, IEB-96-1, NUDOCS 9608050117 | |
| Download: ML20116E140 (8) | |
Text
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- Commonwealth 1:dison Company II)ron Generating Station (60 North German Church Road Ilyron. II. 6101a979 4 Tcl H1423 644-il July 29,1996 LTR:
BYRON 96-0210 FILE:
1.10.0101 U. S. Nuclear Regulatory Commission Washington, 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.
3.
Letter from K. L. Graesser to U.S. Nuclear Regulatory Commission transmitting Byron Station results of rod drop testing and drag force testing, dated May 8,1996.
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 BIR07 on April 5,1996. Upon reactor shutdown, 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 were submitted to NRC in Reference 3. Rod drop testing and drag force testing was reperformed following completion of refueling activities. The results of these tests are contained in the Attachment to this letter. Also included in the Attachment is a core map of rodded fuel assemb!ies indicating fuel types and current and projected end of cycle burnup.
9608050117 960729 J7 r '/
PDR ADOCK 05000454
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P PDR A Unicom Company
.4 Byron Ltr 96-0210 July 29,1996 Page 2 I aflirm that the content of this transmittal is tme and correct to the best of my knowledge, information and belief.
If you need any additional information concerning this report, please contact Scott Connelly, Lead Nuclear Engineer, at (815) 234-5441, extension 2284.
i Sincerely, K. L. Ko ron[
Station Manager Byron Nuclear Power Station KLK/LJZ/klh Attachment cc:
G. Dick, Byron Project Manager-Nim H. Miller, Regional Administrator-RIII H. Peterson, Senior Resident Inspector-Byron Oflice of Nuclear Safety-IDNS i
Subscribed and sworn before me on thisl day of
.1996
[ ~- ~ w by (11h!
'Notar[Public
l Attachment Byron Unit 1 Cycle 8 Fuel Types j
Region 8 t
Westinghouse 17X17 Vantage-5 (0.360 in. O. D. fuel rod), with anti-snag grids, Removable Top Nozzle (RTN), Debris Filter Bottom Nozzle (DFBN), Intermediate Flow 3
Mixing Grids (IFM), inconel top and bottom grids, Zr-4 cladding, mid-grids, IFMs, guide and instrument thimbles. Guide thimble inner diameter dimension: 0.442 in, and d
0.3970 in. in the dashpot.
Region 9 Westinghouse 17X17 Vantage-5 (0.360 in. O. D. fuel rod), with anti-snag grids, oxide coated fuel rod bottom ends, Removable Top Nozzle (RTN), Debris Filter Bottom Nozzle (DFBN), intermediate Flow Mixing Grids (IFM), Debris filter bottom grid, inconel top and bottom grids, Zr-4 cladding, mid-grids, IFMs, guide and instrument thimbles.
Guide thimble inner diameter dimension: 0.442 in. and 0.3970 in. in the dashpot.
Region 10 Westinghouse 17X17 Vantage-5 (0.360 in. O. D. fuel rod), V5 with anti-snag grids, oxide coated fuel rod bottom ends, Removable Top Nozzle (RTN), Debris Filter Bottom 3
i Nozzle (DFBN), Intermediate Flow Mixing Grids (IFM), Debris filter bottom grid, Inconel top and bottom grids, ZlRLO cladding, mid-grids, IFMs, guide and instrument thimbles.
j Guide thimble inner diameter dimension: 0.442 in. and 0.3970 in. in the dashpot.
a t
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Byron Unit 1 Cycle 8 Reference Loading Pattern l
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(
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Region 8A (3.995 w/o)
Region 9A (3.992 w/o)
Region 10A (4 411 w/o)
{
8 Assemblies 52 Assemblies 36 Assemblies 1
j
- . ;; Region 8B (3.798 w/o)
JnnF Region 9B (3.619 w/o)
Region 10B (4.208 w/o)
(
17 Assemblies 40 Assembhes 40 Assemblies 1
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l XnnX Fuel Assembly I.D.
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IDENTIFIER LOCATIONS IDENTIFIER LOCATIONS i
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O MWD /NTU 1198 PPM 100 % POWER 1.445 CORE F-DELTA-H 8B 10A 95 9B E 10A 9A
- 0A 8A
.884 1.181 1.154 1.185 1.373 1.245 1.150
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.920 1.294 1.209 1.259 1.445 1.323 1.388
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18678 22393 0
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32106 10A 93 10B 9A 9A 9B 10B 9B 1.181 1.070 1.235 1.241 1.315 1.154 1.085
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j 18678 0
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.299 1.259 1.332 1.402 1.099 1.340 1.328 1.277
.582 22393 22164 0
32106 0
18104 0
32937 i
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i I
REGION NUMBER OF POWER BURNUPS A
IDENT.
ASSEMBLIES SHARING TOTAL CYCLE i
BA 8
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1 8B 17
.331 32434 0
9A 52 1.111 20165 0
9B 40
.869 21696 0
10A 36 1.181 0
0 10B 40 1.159 0
0 BYRON UNIT 1 CYCLE 8 POWER AND BURNUP DISTRIBUTION AT 0 MWD /MTU, RFP, ARO, No XENON j
m
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18200 MWD /MTU 14 PPM 100 % POWER 1.412 CORE F-DELTA-H SB 10A 9B 9B 10A 9A 10A GA
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.941 1.268 1.027 1.251
.557
.938 1.368 1.080
.972 1.317 1.076 1.357
.800 51260 24760 38170 40408 23525 39705 21941 41063 10A 98 10B 9A 9A 9B 10B 95 1.329 1.016 1.296 1.005 1.029 1.004 1.250
.592 1.368 1.059 1.345 1.065 1.082 1.075 1.373
.831 24760 41866 24339 41560 38764 40255 21771 31882 93 10B 9B 10A 9A 10B E 103 95 1.013 1.296 1.026 1.316 1.043 1.345 1.258
.568 1.080 1.345 1.075 1.361 1.104 1.412 1.403
.818 38170 24330 41027 24748 42342 24461 21693 31307 95 9A 10A SA 10B 9A 10A 8B
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.962 1.332 1.096 1.134
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.665 1.317 1.082 1.104 1.385 1.191 1.351
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.718 MP MAXIMUM POWER As ASSEMBLY B N P 41063 31892 31319 39106 m
er:AK QUADRANT REGION NUMBER OF POWER BURNUPS IDENT.
ASSEMBLIES SHARING TOTAL CYCLE 8A 8
.760 45726 13620 8B 17
.399 38842 6408 9A 52
.967 38248 18084 9B 40
.832 36843 15147 10A 36 1.243 22509 22509 10B 40 1.296 23442 23442
- BYRON UNIT 1 CYCLE 8 POWER AND BURNUP DISTRIBUTION AT 18200 MWD /MTU, HFP, ARO, EQUILIBRIUM XENON
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. s RCCA Droo Times and Drao Forces at the Beainina of Byron Unit 1 Cvele 8 4
No.
RCCA Drop Time Difference Drop Time Difference Adequate (n)
Location (to Entry from (Dashpot from Recoil into Averate Entry to Average (Yes/No)
Dashpot)
Drop Time Full Dashpot Insertion)
Time 1
B-04 1.475
-0.035 0.450
-0.018 Yes 2
B-06 1.475
-0.025 0.470 0.002 Yes 3
B-08 1.485 0.020 0.495 0.027 Yes 4
B 10 1.490
-0.020 0.460
-0.008 Yes 5
B-12 1.490 0.010 0.470 0.002 Yes 6
C-05 1.495 0.000 0.445
-0.023 Yes 7
C-07 1.465
-0.005 0.430
-0.038 Yes 8
C-09 1.470
-0.025 0.460
-0.008 Yes 9
C-11 1.500 0.000 0.470 0.002 Yes 10 D-02 1.520 0.040 0.460
-0.008 Yes 11 D-04 1.485 1.485 0.440
-0.028 Yes 12 D-08 1.480
-0.040 0.470 0.002 Yes 13 D-12 1.480
-0.040 0.455
-0.013 Yes 14 D-14 1.510 0.030 0.450
-0.018 Yes 15 E-03 1.535 1.535 0.470 0.002 Yes 16 E-13 1.510
-0.010 0.495 0.027 Yes 17 F-02 1.505 0.000 0.475 0.007 Yes 18 F-06 1.505 1.505 0.445
-0.023 Yes 19 F-08 1.505 1.505 0.450
-0.018 Yes 20 F-10 1.525 1.525 0.460
-0.008 Yes 21 F-14 1.535 0.030 0.505 0.037 Yes 22 G-03 1.515 0.030 0.450
-0.018 Yes 23 G-13 1.485
-0.035 0.480 0.012 Yes 24 H-02 1.510 0.015 0.480 0.012 Yes 25 H-04 1.480
-0.018 0.490 0.022 Yes 26 H-06 1.495 1.495 0.455
-0.013 Yes 27 H-08 1.505 1.505 0.485 0.017 Yes 28 H-10 1.480 1.480 0.455
-0.013 Yes 29 H-12 1.490 1.490 0.485 0.017 Yes 30 H-14 1.495 0.005 0.485 0.017 Yes 31 J-03 1.490 1.490 0.475 0.007 Yes 32 J-13 1.520 1.520 0.470 0.002 Yes 33 K-02 1.530 0.040 0.470 0.002 Yes 34 K-06 1.470 1.470 0.450
-0.018 Yes 35 K-08 1.490 1.490 0.465
-0.003 Yes 36 K-10 1.490 1.490 0.465
-0.003 Yes 37 K-14 1.500 0.025 0.460
-0.008 Yes 38 L-03 1.535 1.535 0.510 0.042 Yes 39 L-13 1.520 1.520 0.465
-0.003 Yes 40 M-02 1.535 1.535 0.485 0.017 Yes 41 M-04 1.490 1.490 0.465
-0.003 Yes 42 M-08 1.475 1.475 0.495 0.027 Yes 43 M-12 1.500 1.500 0.475 0.007 Yes 44 M-14 1.520 1.520 0.450
-0.018 Yes 45 N-05 1.520 1.520 0.485 0.017 Yes 46 N-07 1.485 1.485 0.455
-0.013 Yes 47 N-09 1.470 1.470 0.475 0.007 Yes 48 N-11 1.490 1.490 0.485 0.017 Yes 49 P-04 1.495 1.495 0.455
-0.013 Yes 50 P-06 1.480 1.480 0.450
-0.018 Yes 51 P-08 1.520 0.022 0.475 0.007 Yes 52 P-10 1.495 1.495 0.480 0.012 Yes 53 P-12 1.475 1.475 0.480 0.012 Yes Average D 1.498 0.468