ML20062H074
| ML20062H074 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 08/06/1982 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| REF-PT21-82 10CFR-050.55E, 10CFR-50.55E, NCR-1749, NUDOCS 8208130287 | |
| Download: ML20062H074 (2) | |
Text
7 TENNESSEE VALLEY AUTHORITY
~-
CH ATTANOOGA. TENNESSEE 374ot 400 Chestnut Street Tower II August 6, 1982 h.
a.
.BLRD-50-438/82-22
[o tn U.S. Nuclear Regulatory Commission B
Region II g
Attn:
Mr. James P. O'Reilly, Regional Administrator 101 Marietta Street, Suite 3100 o
Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNIT 1 - UNACCEPTABLE REPLACEFENT FOR COMPONENT COOLING WATER PUMP SHAFT - BLRD-50-438/82 SECOND REVISED FINAL
_ REPORT The subject deficiency was initially reported to NRC-0IE Inspector Don Quick on March 1, 1982 in accordance with 10 CFR 50.55(e) as NCR 1749 This was followed by our first interim report dated March 29, 1982,.our final report dated-June 2, 1982, and our revised final report dated July 8,-
1982. As discussed with E. H. Girard by telephone on July 23, 1982, enclosed is our second revised final report. The reason for the revision is to provide additional information to clarify the report. 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, nager i
Nuclear Licensing Enclosure cc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555
! OFFICIA1. C01'Y, p
8208130267 820806 ff,L7 PDR ADOCK 05000438 PDR g
An Equal Opportunity Employer
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- 9 ENCLOSURE BELLEFONTE NUCLEAR PLANT UNIT 1 UNACCEPTABLE REPLACEMENT FOR CDMPONENT COOLING WATER PUMP SHAFT NCR 1749 BLRD-50-438/82-22 10 CFR 50.55(e)
SECOND REVISED FINAL REPORT Description of Deficiency TVA received Babcock & Wilcox (B&W) letter No. SOM-17 which stated-that B&W had been advined by the pump vendor, Hayward-Tyler Pump Company of Burlington, Vermont, that the test yield stress values for the replacement shaft material for the CCW pump did not meet the minimum yield stress value required by the design calculations. Because of this information, the replacement shaft is not suitable for the intended duty of the pump and operation of the subject pump was stopped immediately. The shaft discussed in this report is the replacement shaft that was installed to resolve nonconformance report (NCR) 1621 which was previously reported under 10 CFR 50.55(e). The cause of the deficiency is a breakdown in the vendor's QA program. Based on TVA's review of records on other equipment supplied by Hayward-Tyler, there are no implications to other Hayward-Tyler pumps supplied to TVA.
Safety Ieplications Inasmuch as the yield stress value of the subject pump shaft falls below the minimum value specified in the design calculations, the shaft could fail during normal operation, resulting in a failure of the CCW pump.
Failure of the CCW pump could adversely affect the CCW system which, in turn, could adversely affect the safe operation of the plant.
Corrective Action The replacement shaft will be returned to Hayward-Tyler. TVA will perform the repairs recommended by B&W to the original pump shaft (see NCR 1621).
TVA considers this an isolated incident and no TVA action is required to prevent recurrence inasmuch as this incident is a breakdown in the vendor's quality control and assurance program. TVA has not yet received return shipping instructions from the vendor of the defective pump shaft. The pump shaft will be returned upon receipt of these instructions. The corrective action on these matters will be completed by December 1, 1982.-
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