ML19323H280
| ML19323H280 | |
| Person / Time | |
|---|---|
| Site: | Hartsville, Phipps Bend  |
| Issue date: | 06/04/1980 |
| From: | TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML19323H277 | List: |
| References | |
| HTN-QEB-80-01, HTN-QEB-80-1, NCR-10, PBN-QEB-80-01, PBN-QEB-80-1, NUDOCS 8006120313 | |
| Download: ML19323H280 (1) | |
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9 ENCLOSURE HARTSVILLE NUCLEAR PLANTS A AND B AND PHIPPS BEND NUCLEAR PLANT STEAM TUNNEL EMBEDMENT STIFFENER PLATE WELD QA IMPLEMENTATION (ATLAS MACHINE AND IRON WORKS)
NCR'S 10, HTN QEB 80-01, PBN QEB 80-01 10 CFR PART 50.55(e)
REPORT NO. 1 (INTERIM) on May 5, 1980, TVA informed NRC-0IE, Region II, Inspector R. W. Wright, of a potentially reportable condition under 10 CFR Part 50.55(e), regarding a steam tunnel embedment stiffener plate weld. This structure was manu-factured by Atlas Machine and Iron Works (Atlas), Gainesville, Virginia.
On bby 13, 1980, TVA informed R. W. Wright of a potentially reportable condition under 10 CFR Part 50.55(e) regarding a breakdown in the Atlas QA program. This is the first interim report on these items. TVA anticipates transmitting the next report on or before September 19, 1980.
Description of Deficiency When Atlas presented the Hartsville unit Al steam tunnel embedment to TVA for shipment, it was rejected because some joints did not match within allowable tolerances. To repair this condition, the assembly had to be cut into segments for realignment. When this was done, a TVA inspector noticed a backing bar which was not flush to a stiffener plate. Upon removal of the backing bar it was observed that this seam had not been welded. The end stiffener plate in upper column 1B was welded on three sides only. This instance of a weld being omitted is documented on NCR-10.
This condition indicates that the Atlas inspection
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program is deficient.
j On April 29 and May 2, 1980, TVA conducted an audit of Atlas. This audit revealed 16 deficiencies in the implementation of the Atlas QA f
program, nine of which are considered significant. These deficiencies are documented in NCR's HIN QEB 80-01 and PBN QEB 80-01.
Corrective Action The weld that was omitted from the stiffener plate (NCR-10) has been made and inspected per QA requirements. TVA has two resident inspectors at Atlas to supervise inspection and repair of the steam tunnel embedment and monitor other contracts. Any other significant construction deficiencies will be nonconformed and repaired to meet applicable requirements. A contract engineer and a QA evaluator have also been sent to Atlas, to advise and aid in contractual and QA program difficulties. They will remain at Atlas until TVA is satisfied that adequate performance is being maintained.
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