ML20028A519
| ML20028A519 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 11/10/1982 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-82 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8211220257 | |
| Download: ML20028A519 (2) | |
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TENNESSEE VALLEY AUTHORITY CH ATTANOOG A. TENNESSEE 374ot 400 Chestnut Street Tower II a
November 10, 1982
.c BLRD-81-61 b
.D -d U.S. Nuclear Regulatory Commission E
K. m
..a Region II o
Attn:
Mr. Jarses P. O'Reilly, Ragional Administrator
'Z 101 Marietta Street, Suite 3100 o
Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNIT 1 - REACTOR COOLANT PUMP IMPELLER TO SHAFT MISMATCH - BLRD-50-438/81 FIFTH INTERIM 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 interim reports dated October 20 and December 29, 1981 and March 16 and July 2, 1982. Euclosed is our fifth interim report. We expect to submit our next report by February 11, 1983 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 L. M. Mills, Manager Nuclear Licensing l
Enclosure cc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement l
U.S. Nuclear Regulatory Commission l
Washington, D.C.
20555 Mr. James McFarland (Enclosure)
Senior Project Manager l
Babcock & Wilcox Compny P.O. Box 1260 Lynchburg, Virginia 24505 1
CO 8211220257 821110 l
PDR ADOCK 05000438 h
l S
PDR An Equal Opportunity Employer
e
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ENCLOSURE BELLEFONTE NUCLEAR PLANT UNIT 1 REACTOR COOLANT PUMP IMPELLER TO SHAFT MISMATCH NCR'S 1596 AND 1589 BLRD-50-438/81-61 10 CFR 50.55(e)
FIFTH INTERIM REPORT Description of Deficiency During 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 fitup 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 pumpa. Proper impeller-shaft fitup has not yet been verified at the plant site for the unit 2 pumps; however, the vendor has confirmed that of the eight Bellefonte reactor coolant pumps (four per unit), only the impeller for pump 1P1A2 was reground. The shaft for unit 2 pump 2P1A1 was returned to the vendor for remachining because it lacked a keyway. This condition was documented by NCR 1388.
Interim Progress NCR 1589 The shaft and impeller for pump 1P1A2 were returned to the vendor for remachining. The remachining has been completed and the impeller and shaft have been returned to the plant site.
NCR 1596 On September 15, 1982, B&W informed TVA that the schedule for submittal of revised documentation has slipped to December 1, 1982. After submittal, TVA will evaluate this document and forward more information in its next report.
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