ML20079Q994
| ML20079Q994 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 06/14/1983 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8306210252 | |
| Download: ML20079Q994 (2) | |
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TENNESSEE VALLEY AUTHORITY 4
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June 14, 1983 I/g #
BLRD-50-438/83-17 8,. 8g BLRD-50-439/83-13 U.S. Nuclear Regulatory Conmiission Region II Attn: Mr. James P. O'Reilly, Regional Administrator 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - CANNOT IDENTIFY GRADE OF NUTS BECAUSE OF ORIENTATION - BLRD-50-438/83-17, BLRD-50-439/83 SECOND INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector P. E. Fredrickson on January 26, 1983 in accordance with 10 CFR 50.55(e) as NCR 2182. This was followed by our interim report dated February 24, 1983 Enclosed is our second interim report. We expect to submit our next report by September 30, 1983 If you have any questions, please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY o
L. M. Mills, nager Nuclear Licensing cc: Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Records Center (Enclosure)
Institute of Nuclear Power Operations 1100 circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 OFFICMII'dQ 8306210252 830614
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An Equal Opportunity Employer
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ENCLOSURE' BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 CANNOT IDENTIFY GRADE OF NUTS BECAUSE OF ORIENTATION BLRD-50-438/83-17, BLRD-50-439/83-13 NCR 2182 10 CFR 50.55(e)
SECOND INTERIM REPORT Description of Deficiency The grade of nut.on,approximately 50 percent of all high strength bolted connections inctnlled in thr; plar.t cannet be' identified since the nuts were installed with the grade markings faced against the structural member.
Nuts were installed by craft personnel without any attempt being made to place markings outward for easy identification. The procedures do not specifically state that the nuts are to be turned outward for identifica-tion, although this must be done in order to verify the grade of material.
The high strength nuts in question are very similar to a heavy-hex low strength nut which has no identifying markings and is in use at the project. Because of a lack of segregation in the field, the possibility exists that low strength nuts have been installed in place of high strength nu ts.
The cause of this deficiency has been determined to be the lack of procedural guidance for the installation of high strength nuts.
Interim Progress TVA's Division of Engineerin'g. Des.ign has supplied the testing and acceptance criteria necessary to perform the sampling program of the c onnections. TVA's Singleton Materials Engineering Laboratory will conduct the program by performing a hardness test on the nuts in their installed position.
Further information will be provided upon conclusion of the-testing.
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