ML20039E078
| ML20039E078 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 12/29/1981 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-81 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8201060501 | |
| Download: ML20039E078 (2) | |
Text
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e TENNESSEE VALLEY AUTHOF3tTYgg CH ATTANOOGA. TENNESSEE 37401 (ANTA 6e, gg,^,
g 400 Chestnut Street Towcr II December 29,0i9tf C 3l A 8 3
- BLRD-50-438/81 Mr. James P. O'Reilly, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission
' Region II - Suite 3100 101 Marietta Street Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNIT 1 - REACTOR COOLANT PUMP IMPELLER TO SHAFT MISMATCH - BLRD-50-438/81 SECOND INTELIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector R. V. Celenjak on September 17, 1981 in accordance with 10 CFR 50.55(e) as NCR's 1589 and.1596. This was followed by our first interim report dated October 20, 1981. Enclosed is our second interim report. We expect to submit our next report by March 17, 1982. We consider 10 CFR Part 21 applicable to this deficiency.
If you have any questions concerning this matter, please 'get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY
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L. M. Mills, Manager,d-Saf% 51982>
Nuclear Regulation
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Mr. Richard C. DeYoung, Director (Enclosure)
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U.S. Nuclear Regulatory Commission Washington, DC 20555 Mr. James McFarland (Enclosure)
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ENCLOSURE BELLEFONTE NUCLEAR PLANT UNIT 1 REACTOR COOLANT PUMP IMPELLER TO SHAFT MISMATCH BLRD-50-438/61-61 10 CFR 50.55(e)
SECOND INTERIM REPORT Description of Deficiency "uring testing conducted by the pump vendor (Bingham-Willamette, Portland, Oregon), the impeller for reactor coolant pump 1P1A2 expanded slightly because of thermal effects. To correct this condition, the vendor removed some material from the impeller. The removal of this material resulted in improper dimensional contact for the impeller shaft and restriction sleeve, which prevents acceptable fitup of the impeller to the shaft. The unacceptable ritup was discovered during pump installation at the plant site. Onsite review of the vendor's data package for this pump revealed discrepancies in the documentation for posttest inspection. The data package states that the impeller taper was reground and the impeller refit before shipment; but in actuality, the impeller was never refit.
These deficiencies resulted from inadequate inspection to verify and document proper fitup after regrinding the impeller. Nonconformance report (NCR) 1589 documents the unacceptable ritup, and NCR 1596 describes the documentation discrepancies in the data package.
This deficiency does not exist for the other three unit 1 reactor coolant pumps.
' roper impeller-shaft fitup has not yet been verified at the plant si 'e for the unit 2 pumps; however, the vendor has confirmed that of the eigr ' 3ellefonte reactor coolant pumps (four per unit), only the impeller. or pump 1P1 A2 was reground. The shaft for unit 2 pump 2P1 A1 was returned to the vendor for remachining because it lacked a keyway. This condition was documented by NCR 1388.
Interim Progress TVA is continuing its investigation of this matter as is Babcock and Wilcox. Further information will be provided in our next report.
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