ML20106H669
| ML20106H669 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 10/12/1984 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8410310707 | |
| Download: ML20106H669 (2) | |
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TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 374o1 400 Chestnut Street Tower II g ggr $2p.19 BLRD-50-438/84-50 '
BLRD-50-439/84-46 U.S. Nuclear Regulatory Commission Region II Attn:
Mr. James P. O'Reilly, Regional Administrator 101 Marietta Street, NW, Suite 2900
. Atlanta, Georgia 30323
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANTS UNITS 1 AND 2 - UNAUTHORIZED SUBSTITUTION OF
-UNISTRUT ATTACHMENTS FOR SSDs - BLRD-50-438/84-50, BLRD-50-439/84 FIRST INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector P. E. Fredrickson on September 17, 1984 in accordance with 10 CFR 50.55(e) as NCR 3436. Enclosed is. our first interim report. We expect to submit our next report on or about February 10, 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.D M L. M. Mills, Manager Nuclear Licensing Enclosure 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
"!Ais8R7!!a818e m'FICIAL COPY 0
S pop An Equal Opportunity Employer g
ENCLOSURE BELLEF0h"fE NUCLEAR PLANTS UNITS 1 AND 2 UNAUTHORIZED SUBSTITUTION OF UNISTRUT ATTACHMENTS FOR SSDs BLRD-50-438/84-50, BLRD-50 439/84-46
'NCR 3436 10 CFR 50.55(e)
FIRST INTERIM REPORT O. y '
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Description of Deficiency TVA drawing 3GA0059-00-16 R5 allows the substitution of unistrut attachments for 1/2-inch expansion shell anchors (SSD) in three specific base plate designs. All other substitutions must be approved on a case-by-case basis. The Bellefonte Construction project has been indiscriminately substituting unistrut attachments for 1/2-inch expansion shell anchors.
The problem is limited to Bellefonte drawings and procedures and does not apply to earlier plants.
The apparent cauce of thia deficiency was that the requirement for anchor substitution has been revised mveral times during the project life, consequently causing some confusion. TVA's Office of Construction (CONST) personnel have been under the false impression that a unistrut attachment was superior to a 1/2-inch expansion shell anchor. This led CONST personnel to instruct engineering, inspection, and craftsmen to accept the substitution. CONST's " Seismic Support Installation / Inspection" training program formally mdorsed this misconception.
Interim Progress l
TVA is in the process of determining the extent of and the necessary corrective actions for this condition.
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