ML19331C599
| ML19331C599 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 07/03/1980 |
| From: | William Jones OMAHA PUBLIC POWER DISTRICT |
| To: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| IEB-80-08, IEB-80-8, NUDOCS 8008190099 | |
| Download: ML19331C599 (3) | |
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- i 2IC NSIC Omaha Public Power District 1623 HARNEY O M A H A.
NESRA5KA 68102 TELEPHONE 536-400 July 3, 1980 Mr. K. V. Seyfrit, Director U.S. Nuclear Regulatory Comission Office of Inspection and Enforcement Region IV 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76011
Reference:
Docket No. 50-285
Dear Mr. Seyfrit:
The Omaha Public Power District received IE Bulletin 80-08, dated April 7,1980, regarding examination of containment liner penetra-tion welds. Attached hereto is the result of the District's review in response to the bulletin.
Sincerely, W. C. Jones Division Manager Production Operations WCJ/KJM/PRT: cal Attachment cc:
U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement Division of Reactor Operations Inspection Washington, D.C.
20555 U.S. Nuclear Regulatory Commission Director, Division of Reactor Constructica Inspection Washington, D.C.
20555 LeBoeuf, Lamb, Leiby & MacRae 1333 New Hampshire Avenue Washington, D.C.
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ATTACHMENT RESPONSE TO IE BULLETIN 80-08 Request 1 Determine if your facility contains the flued head design for penetration connections, or other designs with containment boundary butt weld (s) between the penetration sleeve and process piping as illustrated in Figure NE 1120-1, Winter 1975 Addenda to the 1974, and later editions of the ASME B&PV Code.
Reponse The penetration connection design between the penetration sleeve and process piping at the Fort Calhoun Station is similar to that shown in item "d" of Figure NE 1120-1, for 29 of the 100 mechanical penetrations.
Request 2 If an affinnative answer is reached for Item 1, satermine the following:
Applicability of the ASME Code, including year and addenda and/or a.
Type of nondestructive examinations performed during construction, Type of weld joint (including pipe material and size) and whether c.
or not backing bars were used, d.
Results of construction nondestructive examinations, i.e., if repairs were required, this should be identified including e>'An'.
of repairs and description of defects encountered during rer ir, if known.
Response
l a.
ASME Section III, Winter' of 1969.
l l
b.
Liquid penetrant testing was employed on all welds.
c.
All the welds were butt welds with no backing bars used.
The piping materials and sizes used are as follows:
l Material Size Remarks A333 GRl 8" SCH 80 Note 1 A333 GRI 12" SCH 80 Note 1 A333 GR1 14" SCH 80 Note 1 A333 GR1 18" SCH 80 Note 1 A516 GR60 44" x 2" wall Note 2
/
Response to IE Bulletin 80-08 Page Two Nctes 1.
Pipino materials were butt welded to seal rings made of A-316, GR60 firebox quality steel, 1 inch thick.
2.
Piping material was butt welded to a seal ring made of A-516, GR60 firebox steel,1 inches thick.
d.
Only two welds were rejected after liquid penetrant testing. The defects found and corrective action taken were as follows:
(i) Slag - erradicated by brushing with a wire brush.
(ii) Porosity - weld ground out and redone.
Both welds were acceptable following corrective action.
Reouest 3 For those facilities committed during construction to perform volumetric examination of such penetrations through SAR commitments which have not performed radiography, justify not performing radiography or submit plans and schedules for performing radiographic examinations.
Response
Not applicable to Fort Calhoun Unit 1.
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