ML20082A838
| ML20082A838 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 09/30/1983 |
| From: | Kuncl L NEBRASKA PUBLIC POWER DISTRICT |
| To: | Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| REF-SSINS-6820 IEB-83-03, IEB-83-3, LQA8300230, NUDOCS 8311180266 | |
| Download: ML20082A838 (2) | |
Text
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_ m LQA8300230 September 30, 1983 73@KWM 3 l 1 Mr. John T. Collins Regional Administrator
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OCT g,i g U.S. Nuclear Regulatory Commission
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Region IV 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76011
Subject:
Response to IE Eulletin No. 83-03 1
" Check Valve Failures in Raw Water Cooling Systens of Diesel Generators"
Dear Mr. Collins:
This report is the follow-up response to item 5 of the subject Bulletin.
Ihe four service rater check valves referenced in our June 10, 1983 le'.ter.to the Nuclear Regulatory Commission are SW-35CV, 36CV, 37CV ar1 3SCV. The v21ves were disassembled and inspected and the overall results indicated tha valves.had negligible wear and were functioning j
p:operly.
De tailed inspec:itm of the valve internals showed the seating surfaces
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an ' hinge pins ca:1 sene ninor pitting and traces of rust. The discs j
anc hinge pins were dye penetrant tested for defects. None were found.
l The olerancas be veen the hinge pins and hinges were measured and f cund r be The valves were reassenbled and returned to oper-
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ation.
As indicated in our initial response letter, all four check valves have been placed on a three year Inservice Test schedule to assure continued valve integrity.
Sincer ly, n
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L. C. Kt nel Assistant General Mant ger-Nuclear
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Original:
Document Control Desk j
U.S. Nuclear Regulatory Commission DE "NATED I INAD \\
1 Washington, DC 20555 0'O - #f 8 8311180266 830930 ce,ttffei By H>
PDR ADDCK 05000298 1
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Mr. John T. Collins September 30, 1983 Page 2 STATE OF NEBRASKA )
) ss PLATTE COUNTY
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L. G. Kuncl, being first duly' sworn, deposes and says that he is an authorized representative of the Nebraska Public Power District, a public corporation and political subdivision of the State of Nebraska; that he is duly authorized to submit this information on behalf of Nebraska Public Power nistrict; and that the statementa contained
-herein are true to tha best of his knowledge and belief.
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(L G. Kunc Subscribed in my presence and sworn to before me this sod day of September, 1983.
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