ML20030D515
| ML20030D515 | |
| Person / Time | |
|---|---|
| Site: | Phipps Bend  |
| Issue date: | 08/25/1981 |
| 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 8109010476 | |
| Download: ML20030D515 (2) | |
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t id' TENNESSEE VALLEY, AUTHORITY CH ATTANOOGA. TENNESSEE' 374o1, 400 Chestnut Street Tower II JhuWstNS,1hK1
[PT94f4 PBRD-50-553 /81-08 4 '/
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V Mr. James P. O'Reilly, Director Office of Inspection and Enforcement hv p U.S. Nuclear Regulatory Commission g
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Region II - Suite 3100 se
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101-Marietta Street 4
Atlanta, Georgia 30303 rgg\\'\\
Dear Mr. O'Reilly:
PHIPPF BEND NUCLEAR PLANT UNIT 1 - REPORTABLE DEFICIENCY -
UNDERSIZED PLATES - PBRD-50-553/81-08 The subject deficiency was initially reported to NRC-0IE, Region II, Inspector R. W. Wright on February 13, 1081 as NCR PBNP-193 The final report on the deficiency was submitted on March 16, 1981.
In i
response to NRC's request documented in OIE Insoection Report Numbers 50-553/81-05 and 50-554/81-05 dated June 30, 1o81, as open item 553, 554/81-05-04, we arc enclosing the revised finat report on the subject deficiency.
If you have any questions, please call Jim Domer at FTS 857-2014.
Very truly yours, 1
TEf!NESSEE VALLEY AUTHORITY
. M. Mills,It nager fluclear Regulation and Safety Enclosure cc:
Mr. Victor Stello, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 Ten s
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8109010476 810825 '-
gDRADOCK 05000553:
An Equal Opportunity Employer
,s ENCLOSURE PHIPPS BEND NUCLEAR PLANT INSERT PLATES - UNDERSIZED PBRD-50-553/81-08 10 CFR 50 55(e)
REPORT NO. 2 (REVISED FINAL) l Description of Deficiency j
During the installation of insert plates, it was discovered that stainless steel curb plates (FSP-CP-4 and FSP-CP-9) were 1/2-inch thick instead of 1-inch thick as required by applicable drawing 5225-314.
These plates were manufactured by Stellar Manufacturing Company (Stellar), Collingswood, New Jersey. These plates are used to mount equipment in the fuel building service pool and as fuel rack grid assembly supports. The cause of the deficiency was due to Stellar's inadvertent substitution of similar-sized anchor plates (1/2-inch thick) instead 7f the 1-inch thick support plates required.
On review of TVA's final report for NCR PBNP-193, the NRC inspector noted that the cause of this deficiency had not been identified and documet ted for this item. As a result, TVA personnel from the Philadelphia Regioini QC Office met with Stellar Manufacturing Company representatives on June 8,1981 to discuss the cause of the wrong insert plates being installed on two curb-panel plates for unit 1.
Stellar determined that this was an isolated incident during material handling associated with word terminology caused when a plant worker requested " anchor plates" instead of " support plates." Both have the same length and width (9-inches by 18-inches) but have different thicknesses; 1/2-inch plate (anchor) used on liner panels versus 1-inch plate (support) used on curb panels. The installed insert plates we o checked at Hartsville by ultrasonic examination and were found to be the proper size.
Safety Implications Had this condition remained uncorrected, the structural integrity of the fuel building si svice pool could have been jeopardized, adversely affecting the safe operation of the plant.
Corrective Action TVA has reworked the insert plates to ensure their adequacy. Structural angles were welded the full length of the insert plate. Welding was done in accordance with AWS Code D1.1, and weld inspection was performed as required by C. F. Braun Specification 300-12. TVA established a hold point for inspection of the curb panels for unit 2 before release of the material for shipment. Corrective action was completed by June 15, 1981.
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