ML20140F682
| ML20140F682 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 06/13/1985 |
| From: | Hufham J TENNESSEE VALLEY AUTHORITY |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NCR-4156, NUDOCS 8507120179 | |
| Download: ML20140F682 (2) | |
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TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 374o1 1630 Chestnut Street Tower II c_o June 13, 1985 s
Z BLRD-50-438/85-17 BLRD-50-439/85-17 2
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LJ U.S. Nuclear Regulatory Comission Region II Attn:
Dr. J. Nelson Grace, Regional Administrator 101 Marietta Street,'NW, Suite 2900 Atlanta, Georgia 30323
Dear Dr. Grace:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - INADEQUATE CONCRETE COVER FOR GROUTED ANCHOR INSTALLATIONS - BLRD-50-438/85-17 AND BLRD-50-439/85-17.- FIRST INTERIM REPORT The subject deficiency was initially reported to NRC-OIE Inspector Al
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Ignatonis on May 20, 1985 in accordance with 10 CFR 50.55(e) as NCR 4156.
Enclosed is our first interim report. We expect to submit our next report on or about October 11, 1985.
If you have any questions, please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY
. d. A J. W. Hufham, Manager Licensing and Regulations Enclosure cc (Enclosure):
Mr. James Taylor, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Comission Washington, D.C.
20555 Records Center Institute of Nuclear Power Operations 1100 circle 75 Parkway, Suite 1500
/.g'd Atlanta, Georgia 30339 8507120179 850613 PDR ADOCK 05000438 g
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PDR An Equal Opportunity Employer
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ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 INADEQUATE CONCRETE COVER FOR GROUTED ANCHOR INSTALLATIONS BLRD-50-438/85-17 AND BLRD-50-439/85-17 NCR BLN 4156 FIRST INTERIM REPORT Description of Deficiency Seismic pipe supports have been installed with anchor bolts in violation of General Construction Specification G-32 (implemented onsite by Bellefonte Nuclear Plant (BLN) Quality Control Procedure (QCP) 2.8).
Appendix D of G-32 requires that in large holes or chipped out areas where grouted anchors are used, the clear distance between the existing concrete and the bolthead is at least three nominal bolt diameters for individual and six nominal bolt diameters for multiple anchors.
In some instances, grouted anchors have been installed in holes chipped through a wall or floor slab without providing three or six bolt diameters of concrete cover beyond the embedded end of the anchor bolts.
Interim Progress All affected grouted anchors have not been specifically identified at this time. BLN plant personnel are to identify grouted anchors which violate General Construction Specification G-32.
Once identified, each installation will be evaluated for adequacy by TVA's Office of Engineering.
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