ML20031E705
| ML20031E705 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte, Hartsville, Phipps Bend  |
| Issue date: | 10/09/1981 |
| 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 8110160325 | |
| Download: ML20031E705 (3) | |
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TENNESSEE VALLEY AUTHORITY CH ATTANOOGA. TENNESSEE 374ot 400 Chestnut Street Tower II October 9, 198
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BLRD-50-438/81-57 -439/81-59 HTRD-50-520/81-22, - 521/81-20 PBRD-50-553/81-27, -554/81-20
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Mr. James P. O'Reilly, Director N. J.,
Office of Inspection and Enforcement OCT151981> 2 U.S. Nuclear Regulatory Commission E
" 8 " gut" h Region II - Suite 3100 101 Marietta Street s
Atlanta, Georgia 30303
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Dear Mr. O'Reilly:
BELLEFONTE, HARTSVILLE, AND PHIPPS BEND NUCLEAR PLANTS - REPORTABLE DEFICIENCY - DELAVAL/MELROSE DEFECTIVE VALVE SPRINGS -
BLRD-50-438/81-57, -439/81-59, HTRD-50-520/81-22, -521/81-20, PBRD-50-553/81-27, -554/81-20 The subject deficiency was initially reported to NRC-0IE, Region II, Inspector R. Crlenjak on September 9, 1981 as NCR's BLN MEB 8102, HTA MEB 8103, HTB MEB 8103, and PBN MEB 8103 In compliance with l
paragraph 50.55(e) of 10 CFR Part 50, we are enclosing our final response on the subject deficiency. We consider 10 CFR-Part 21 applicable to this nonconformance. If you have any questions, please call Jim Domer at FTS 857-2014.
l Very truly yours, TENNESSEE VALLEY AUTHORITY i
NM. M11IkMiinager(h Nuclear Regulation and Safety Enclosure cc:
Mr. Victor Stello, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Pegulatory Commission Washington, D",
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BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 HARTSVILLE NUCLEAR PLANT A UNIT 2 0
HARTSVILLE NUCLEAR PLANT B, UNIT 2 PHIPPS BEND NUCLEAR PLANT UNITS 1 AND 2 DELAVAL/MELROSE DEFECTIVE VALVE SPRINGS 10CFR50.55(e)
BLRD-50-43 8/ 81-57, -43 9/ 81-59 H'IRD-50-520/ 81-22, -521/ 81-20 PBRD-50-553/ 81-27, -554/ 81-20 REPORT NO.1 (FINAL)
Descrintion of Deficiency Transamerica DeLaval, Oakland, California, has identified. a potential defect in intake and exhaust valve springs for-the standby diesel l
generators and spare parts listed.below The possibility exista that
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these springs, annufactured.by the Melrose Spring and Tool Company,.
Oakland', California, were not manuf actured-properly (a, shot peening-operation was omitted).. Transamerica DeLaval notified the NRC of this condition in their letter to the-Director,. Office-of. Inspection and Regulation, dated July 30, 1981. The affected diesel generators and spare parts are:
Hartsville A Unit 2 S/N 77026 Hartsville B Unit 2 SN 77030 and S/N 77033 Phipps Bend' Unit 1 S/N 77032 and S/N 77033 Phipps Dend. Unit 2 S/N. 77034 Hartsville B Unit 2 4 spare valve springs Phipps Bend Unit 1 4 spare valve springs Bellefonte 1 spara cylinder head (P/N 1A-6446)
These springs.are easily identified by their unique color coding.
Safety Isolications The shot peening operation that was omitted in the manuf acture of these springs is necessary to improve the f atigue strength of the spring.
If these springs werernot replaced, they could suffer fatigue failure during use, possibly resulting in the f ailure of the diesel generator. Ther f ailure of these diesel generators would adversely affect the safety of operations of the plant as they are the emergency source of onsite power in the case of loss of power.
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s Cgrrective Actions Ths affected engines spare cylinder head and spare springs will be inspected by TVA CONST utilizing the color code furnished by DeLaval.
All springs found to be potentially defective by this inspection nill be replaced. Transamerica DeLaval will supply the necessary replacement springs and personnel needed to accomplish or supervise the actual work as TVA deems appropriate. This work will be-completed before preoperational testing of the diesel generators.
DeLaval has told. TVA (in their letters to TVA dated August 21, 1981) that they have purged their inventory of these potentially defective springs and that they are taking extra receiving inspection measures to ensure the problem does not reoccur. In addition, DeLaval has taken Melroso Spring and Tool Company off their supplier list (DeLaval letter to TVA i
dated September 18, 1981).
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