ML20117P418
| ML20117P418 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 09/16/1996 |
| From: | Jain S DUQUESNE LIGHT CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| IEB-96-001, IEB-96-1, NUDOCS 9609230244 | |
| Download: ML20117P418 (5) | |
Text
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ver Valley Power Stat 6on Shippingport, PA 15077 0004 s
$UUoNE..were ruNEIU$$U U",c!*.7r *o*N$ivwon September 16, 1996 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555-0001 4
Subject:
Beaver Valley Power Station, Unit No.1 J
Docket No. 50-334, License No. DPR-66 Response to NRC Bulletin 96-01:
Control Rod Insertion Problems i
The Duquesne Light Company (DLC) performed contrci rod drop timing tests on August 20, 1996, at Beaver Valley Power Station Unit No. I during an unscheduled outage to replace a main coolant pump lubrication oil cooler and to perform other maintenance work. The tcsting was performed to satisfy NRC Eulletin 96-01, Requested Action (3). Attached is r. : port that summarizes the data and documents the results obtained. All of the control rods met the required drop time criteria specified in the Unit No. I applicable techaical specification. Analysis of the traces obtained during the control rod drop 6 ming test indicates all control rods exhibited rod recoil on reaching full insertion. The maximum burnup of a rodded fuel assembly at the time of the test was approximately 35.5K MWD /MTU. Continued insertability and operability of the Bew. r Valley Unit No. I control rods was demonstrated by the test.
If you have questions concerning this response, please contact Mr. Roy K. Brosi at (412)393-5210.
Sincerely, Sushil C. Jain Attac!unent f/
TES9/i c:
Mr. D. M. Kern, Sr. Resident inspector Mr. H. J. Miller, NRC Region I Administrator Mr. D. S. Brinkman, Sr. Project Manager gEllVERING GUAL,1TY E N.E R 4 Y 9609230244 960916 FDR ADOCK 05000334 G
l AFFIDAVIT FOR APPLICATION J
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i OF AMENDMENT l
COMMONWEALTH OF PENNSYLVANIA)
) SS:
I COUNTY OF BEAVEL
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Subject:
Beaver Valley Power Station, Unit No.1 l
Docket No. 50-334, License No. DPR-66 Response to NRC Bulletin 96-01:
Control Rod Insertion Problems Before me, the undersigned notary public, in and for the County and l
Commonwealth aforesaid, this day personally appeared Sushil C. Jain, to me known, who being duly sworn according to law, deposes and says that he is Division Vice
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President, Nuclear Services of the Nuclear Power Division, Duquesne Li ht Company, l
b he is duly authorized to execute and file the foregoing submittal on behalf of said j
Company, and the statements set forth in the submittal are true and correct to the best of l
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his knowledge, information and belief.
s Sushil C. Jain Subscribed and sworn to before me on this/Mby of j bt/4Lj /f96 d
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)(otary Public 6
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DUQUESNE LIGHT COMPANY Nuclear Power Division ATTACHMENT 1 Beaver Valley Power Station Unit 1 Cycle 12 Control Rod Testing August 20,1996 Rod Drop Testing i
On August 20,1996, Control Rod Drop Time measurements were performed for all 48 rods in the core due to a reactor shutdown on August 5,1996. Cycle burnup was 2924.78 MWD /MTU. Drop times were measured from the beginning of voltage decay on the stationary gripper coil to entry into the dashpot region and from entry into the i
dashpot region to rod bottom. Each trace was also checked for rod bottom recoil to ensure all rods reached the rod bottom position. All drop times to dashpot entry were within the Technical Specification limit of 2.7 seconds and all rods demonstrated l
positive evidence of recoil (3 or more bounces). A summary of the Beginning of Life (BOL) drop test for Cycle 12 and the drop test performed on August :!0 is listed below.
j i
Time to dashpot (sec.)
Time to rod bottom (sec.)
Test Average Fastest Slowest Average Fastest Slowest Cycle 12 BOL 1.22 1.18 1.35 1.75 1.69 1.95 l
j Cycle 12 Aug 20 1.26 1.22 1.41 1.75 1.69 1.95 All rod drop times for the August 20,1996, test with the corresponding assembly immups are listed in Table 1.
i i
Attachment *1 Table 1.
RIsponse to NRC Bulletin 9641 Beaver Valley Power Station 1
Unit 1 Cycle 12 Rod Drop Test Results August 20,1996 l
Core Assembly Assembly Drop Time Dashpot to Total l
Location ID Burnup to Dashpot Rod Bottom Drop Time (MWD /MTU)
(sec.)
(sec)
(sec)
F6 M25 35488 1.26 0.50 1.76 i
K6 M12 35488 1.26 0.50 1.76 j
c10 M24 35488 1.26 0.46 1.72 K10 M02 35488 1.28 0.48 1.76 H6 M14 34425 1.26 0.54 1.80 F8 M22 34425 1.24 0.46 1.70 K8 M17 34425 1.26 0.49 1.75 H10 M13 34425 1.26 0.48 1.74 D6 M56 30860 1.26 0.46 1.72 M6 M44 30880 1.26 0.56 1.82 D10 M59 30880 1.26 0.52 1.78 M10 M34 30880 1.24 0.46 1.70 F4 M58 30192 1.26 0.48 1.74 i
l K4 M38 30192 1.24 0.50 1.74 j
F12 M36 30192 1.24 0.50 1.74 K12 M37 30192 1.22 0.48 1.70 G7 NO2 17975 1.24 0.49 1.73 J7 N01 17975 1.23 0.48 1.71 l
G9 N04 17975 1.24 0.49 1.73 J9 NO3 17975 1.24 0.46 1.70 D4 N48 17973 1.26 0.55 1.81 M4 N38 17973 1.26 0.52 1.78 D12 N43 17973 1.24 0.48 1.72 M12 N37 17973 1.26 0.46 1.72 F2 N40 17143 1.25 0.51 1.76 K2 N41 17143 1.27 0.47 1.74 F14 N45 17143 1.27 0.51 1.78 K14 N42 17143 1.33 0.50 1.83 B6 N44 17106 1.41 0.54 1.95 P6 N39 17106 1.25 0.52 1.77 B10 N47 17106 1.30 0.49 1.79 P10 N46 17106 1.24 0.48 1.72 E5 N34 3743 1.22 0.48 1.70 Page 2 l
4 Table 1.
R:sponse to NRC Bulletin 96-01 Beaver Valley Power Station Unit 1 Cycle 12 Rod Drop Test Results August 20,1996 Core Assembly Assembly Drop Time Dashpot to Total Location ID Burnup to Dashpot Rod Bottom Drop Time
]
(MWD /MTU)
(sec.)
(sec)
(sec)
..I.f.
N29 3743 1.22 0.48 1.70
_l1 N33 3743 1.24 0.49 1.73 L11 N32 3743 1.23 0.47 1.70 C7 N25 3468 1.23 0.47 1.70 N7 N35 3468 1.23 0.46 1.69 C9 N27 3468 1.23 0.54 1.77 N9 N36 3468 1.25 0.46 1.71
)
G3 N28 3466 f.23 0.47 1.70 J3 N26 3466 1.23 0.52 1.75 G13 N31 3466 1.24 0.50 1.74 J13 N30 3466 1.26 0.46 1.72 H2 P41 3303 1.26 0.48 1.74 B8 P43 3303 1.35 0.54 1.89 P8 P42 3303 1.24 0.46 1.70 H14 P44 3303 1.26 0.48 1.74 l
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