ML20032A436
| ML20032A436 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 10/20/1981 |
| 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 8110290548 | |
| Download: ML20032A436 (2) | |
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TENNESSEE VALLEY AUTHCqlTY SNgg Akh
/C)lj CHATTANOOGA. TENNESSEE 374ot t..
EG/4 400 Chestnut Street Tower II October 20, 1981 23 4 g 3,-
BLRD-50-438/81-22 BLRD-50-439/81-24 e
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sV Mr. James P. O'Reilly, Director
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Office of Inspection and Enforcement g38 g
Region 'II - Suite 3100
. * - #'"f U.S. Nuclea.' Regulatory Commission e
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101 Marietta Street V
4 Atlanta, Georgia 30303 y /;. g g g 2V
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - USE OF UNAPPROVED MASONRY BITS -
BLRD-50-438/81-22, BLRD-50-439/81 THIRD INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector R. V. Crlenjak on March 6, 1981, in accordance with 10 CFR 50.55(e) as NCR 1396. Interim reports were submitted on April 6 and June 3,1981.
Enclosed is our third interim report. We expect to submit our next report by December 31, 1981.
If you have any questions concerning this matter, please get in touch with R. H. Shell at FTS 857-2581.
Very truly yours, TENNESSEE VALLEY AUTHORITY
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'L. M. ' Mills, Manager Nuclear Regulation and Safety Enclosure oc:
Mr. Victor Stello, Jr., Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 g
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58110290548 811020 kPDR ADOCK 05000438
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. An Equal Opportunity Employer
- re ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND ?
USE OF UNAPPROVED MASONRY BITS BLRD-50-438/81-22, BLRD-50-439/81-24 10 CFR 50.55(e)
THIRD INTERIM REPORT Descr.g ion of Deficiency A',achment D of Quality Control Procedure (QCP) BNP-QCP-2.8 specifies izes of masonry drill bits to be used when installing wedge bolts.
[n order to ensure that these sizes are not exceeded, all carbide-tipped masonry drill bits should be1 ordered as engineering-controlled material, which requires the bits to be checked for maximum size. However, at least three orders have been received as construction material and not engineering-controlled material.
Therefore, there is a possibility that wedge bolt anchors have been installed using masonry drill bits which exceed the maximum size specified.
Interim Progress TVA has instructed all crafts togcheck their stock of masonry bits.
All bits which did not have a unique stamp on the shank (signifying their acceptance for installing wedge bolt anchors) were returned to the Quality Control Records Unit (QCRU) trailer. TVA has instructed all employees who order construction materials that all masonry drill bits must be ordered as engineering-controlled material and has incorporated this provision into the BNP-QCP-10.3 R9, Addendum No.1, paragraph 4.1.2 (effective July 15, 1981).
TVA field employees have established a testing program using the largest of the oversized bits returned for each anchor.=4.ze.
Test samples of each type of wedge bolt used on the project are then installed in the oversizad holes and tested to failure. This work should be completed by 'Jecember 15, 1981.
BNP-QCP-2.8 R8, parasraph 6.3.1.4 (effective July 15, 1981) has been changed to encure that proper drill bits are used by requiring a prework inspection hold point. This requires that an engineer measure any bit before its use.
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