ML19308A808
| ML19308A808 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 08/11/1978 |
| From: | Thornburg H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | Parker W DUKE POWER CO. |
| References | |
| NUDOCS 7912110846 | |
| Download: ML19308A808 (2) | |
Text
a Ai!G 111978 Docket Hos. 50 269 270/287 Mr. U. C. harker, Jr.
Vice President - Stea:s Production Duke Power Coopany 422 S. Church Street Charlotte., NC 28242 i
Dear !!r. Parker:
On August 10, 1978, Hr. F. J. Jablonski advised your 14essrs. R. L. Gill and M. Curtis of NRC's plan to conduct confirmatory environmental qualification tests on electrical connector assemb1?es,, and that Viking connectors of the type installed at Oconee Huclear Generating Station Units 1, 2 and 3 have been tentatively selected to be th ted.
At this time it is our intent to perforb the qualification tests in accord-ance with certain information provided by you, to the Director, Office of Inspection and Enforcement, Region II, in response to IE Bulletin Ko. 77-05.
In order for us to accurately duplicate the test conditions, further infor-cation concerning Viking connectors used in Class 1E circuits is requested froa you including:
1.
Part nu:nbers (both rc. ale and ferale) 2.
Drawings (Viking / Duke Power) 3.
Viking Test Report No. QTP-124 I
4.
All other qualification test reports (LOCA, radiation, aging, etc.)
5.
Viking instruction books 6.
Physical sa@les of the connectors 7.
Purchase specifications / orders 8.
Identification of cables used with the cennectors (manufacturer, 4
jacketing and insulating materials, number of conductors, size, etc.)
I, 9.
Connector / cable - assembly / termination procedures A
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it. O. Parker, Jr.
2 To expedite our obtaining the information, we request a meeting at your corporate headquarters with mec:bcrs of your technical staff who have knowledpe of Viking connectors. The meeting is requasted at your staff's earliest convenience but on or before August 17, 1978. Please advise Hr. F. Jablonski of the meeting dato and time. His telephone nu:nber is 312-850-2660.
l Sincerely.
15 I l
Harold D. Thornburg Director Division of Reactor Construction Inspection Office of Inspection and Enforcement t
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RII Oconee Project Inspector i
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NRC FORM 318 (9 76) NRCM 0240 O u. s.aovsmausnT emawtine orrects seve -eas4:4
Tubo slegeing test prograa Both Babcock & Wilcon and Coe.bustion Engineering have designed test sleeves for insertion in the upper end of a number of steam generator tubes, with appropriate Instrumentation, to assess their ef f ect in stif fening the tubes to improve their capability to resist flow-induced vibration, the most likely cause of tube damage found in some other Babcock & Wilcox steam genevators.
1 l
Safety evaluations have been submitted by the applicant for both designs, includ-I l
ing descriptions of the sleeves, locations in the steam generator, method of 2
installation, instrumentation,' bench test results, stress analyses, and an evalua-
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tion of the effects of the test equipment on the safety of the plant.
Eised on a review of the information supplied by the applicant and the siellarity of the sleeves to installations in some Combustion Engineering steam generators, we conclude that neither the structural integrity nor the operational characteris-tics of safety-related equipment involved will be affected by the test program modifications, nor will the consequences of an accident be increased as a result thereof, and therefore that these modifications are acceptable.
Af ter completion of all the above programs we will determine what modifications, if any, we will require to be made to Three Mile Island Unit 2.
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Three Mile Island Unit No. 2 Supplennent 2 to SER February 1978 W
5-4
.