ML20024A360
| ML20024A360 | |
| Person / Time | |
|---|---|
| Site: | Cook, 05000345  |
| Issue date: | 06/09/1983 |
| From: | Alexich M INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG |
| To: | Kepple J, James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| REF-SSINS-6820 AEP:NRC:0799, AEP:NRC:799, IEB-83-03, IEB-83-3, NUDOCS 8306170129 | |
| Download: ML20024A360 (5) | |
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lNDIANA & MICHIGAN ELECTRIC COMPANY P.O. BOX 18 BOWLING GREEN ST ATION N EW YORK, N. Y.10004 June 9, 1983 AEP:NRC:0799 Donald C. Cook Nuclear Plant Unit Nos. I and 2 Docket Nos. 50-315 and 50-316 License Nos. DPR-58 and DPR-74 I.E.Bulletin 83-03 CHECK VALVE FAILURES IN RAW WATER COOLING SYSTEMS OF DIESEL GENERATORS (I.E. Bulletin No. 83-03)
Mr. James G. Keppler Regional Administrator U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 ATTN: Document Control Desk
Dear Mr. Keppler:
This letter and its Attachment respond to I.E. Bulletin No. 83-03, titled " Check Valve Failures in Raw Water Cooling Systems of Diesel Generators".
We have reviewed the Raw Water Cooling System for the Emergency Diesel Generators (EDGs) at the Cook Nuclear Plant. A listing of the check valves in the piping loop to the EDGs is as follows:
UNIT 1 UNIT 2 (Flow Diagram OP 1-5113)
(Flow Diagram OP 2-5113)
ESW-111 ESW-141 ESW-112 ESW-142 ESW-113 ESW-143 ESW-114 ESW-144 JUN 131983 8306170129 830609 PDR ADOCK 05000345
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L These ESW check valves, which are included in our IST Program, are 6" Centerline split center spring loaded check valves. These check valves are tested quarterly in accordance with Section XI, ASME Code, 4
- 1974 Edition, Summer 1975 Addenda, by Operations Procedures No.
1-OHP-4030.STP.022 and No. 2-OHP-4030.STP.022. " Essential Service Water System Test".
This is a functional test to determine forward flow.
These ESW check valves have been visually inspected since 1979, by job order ESW-143 was initially inspected in 1979 and found not seating properly. The impaired condition of this valve led to subsequent inspection of ESW-111, ESW-112, ESW-113 and ESW-114 in Unit 1, and ESW-141, ESW-142, ESW-143 and ESW-144 in Unic 2 1
- during 1979.
These valves were included in Maintenance Procedure 12 MHP 5021.032.001L in April 1982. This Maintenance Procedure, which requires disassembly and inspection of the valves, was not part of our IST Program. However, the valves' inspection is a compulsory part of the procedure and it is mandatory that the inspection be performed during each refueling outage.
The requirement to perform an internal visual inspection of valves designated ESW-111, ESW-112, ESW-113 and ESW-114 Unit 1 and ESW-141, ESW-142, ESW-143 and ESW-144 has been added to the Inservice Inspection Program in QHI-5070 entitled Inservice Inspection.
The Maintenance Inspection history is contained in Attachment No.
I to this letter. Inspection documentation for ESW-111,112,113 and 114 in Unit 1 and ESW-143 and 144 in Unit 2 during 1981 cannot be located.
Item 5 of IE Bulletin No. 83-03 requested a report be submitted on the initial valve. verification as discussed in Item 3.
The aforementioned inspection development and the maintenance history are j
presented in satisfication of the initial inspection report requirement.
Very truly yours, M.N.Alexich MPA/md Vice President cc: John E. Dolan R. S. Hunter R. W. Jurgensen i
W. G. Smith, Jr. - Bridgman R. C. Callen G. Charnoff NRC Inspector at Cook Plant - Bridgman 4
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STATE OF NEW YORK )
COUNTY OF NEW YORK)
M. P. Alexich, being duly sworn, deposes and says that he is the Vice President of Licensee Indiana & Michigan Electric Company, that he has read and knows the contents of the response to IE Bulletin No. 83-03 and that said contents are true to the best of his knowledge and belief.
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Subscribed and sworn to before me this 7 day of v3' /p, 19 73 N
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WILLIAM J. PROCHASKA i
I4otay Public, State of New York No. 43-4636690 Qualified in Richmond County Certificate filed in New York Coun fn===' n 1 spires March 30,19
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ATTACIMENT NO.1 AEP:NRC:0799 Job Order No.
Date Closed Valve No.
Work Done 06969, U-2 1/25/79 ESW-143 Replaced internals (valve would not seat properly).
Broken seat.
03269, U-2 1/29/79 ESW-143 Remove internals -
replaced JO 03127.
03127, U-2 2/1/79 ESW-143 Replaced valve parts installed Job Order 06969 due to improper certifications.
10534, U-2 4/24/79 ESW-141 & 142 Not seating properly.
Flapper pivots badly worn in both valves.
Replaced flappers, seats, springs, stems.
Installed new flange studs.
03511, U-2 5/29/79 ESW-144 Replaced internals with Stainless Steel internals
- inspection requested due to problems with other ESW valves..
03325, U-2 11/1/79 ESW-141 None ESU-142 New valve internal kit.
03692, U-2 11/23/79 ESW-143 Inspected and replaced internals.
ESW-144 Okay 7962, U-1 2/23/79 ESW-111 & 112 Replaced internals.
7963, U-1 3/1/79 ESW-113 & 114 Pivots badly worn, replaced flappers.
l 60016,U-1 6/4/80 ESW-lll Okay l
ESW-112 Replaced internal assembly.
52996, U-1 6/30/80 ESW-ll3 & 114 No wear or corrosion.
22398,-U-2 4/6/81 ESW-141 Replaced seat.
i ESW-142 Okay 73276X4, U-1 7/13/82 ESW-113 & 114 Okay 73275X5, U-l 7/22/82 ESW-111 & 112 Replaced seats, stems, springs.
12610, U-2 11/29/82 ESW-141 Replaced split seat.
ESW-142 Okay
.12609, U-2 12/13/82 ESW-143 & 144 Okay
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S. J. Milioti/H. L. Sobel/J. I. Castresana/T. J. Seery S. H. Horowitz/H. N. Scherer, Jr./J. M. Intrabartola R. F. Hering/S. H. Steinhart/J. A. Kobyra R. F. Kroeger J. F. Stietzel - Bridgman J. B. Shinnock, Esq. - Columbus D. Wigginton - NRC AEP :NRC:0799 DC-N-6015.3.1 PEEPOD/0799 t
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