ML20087N876
| ML20087N876 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 03/23/1984 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-84 NUDOCS 8404050123 | |
| Download: ML20087N876 (2) | |
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- TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 37401 400. Chestnut Street Tower II March 23, 1984 1BLRD-50-438/83-61 a:
,jBLRD-50-439/83-54 U.S. Nuclear Regulatory Cornission
- Region II g,
Attn:-
W. ~ James P. O'Reilly, Regional Administrator 101 Marietta Street, NN, Suite 2900 y
- Atlanta,' Georgia ' 30303-
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR-PLANT UNITS 1 AND 2 -'0VERTORQUED STUDS ON BORG-WARNER GATE VALVE MOTOR OPERATORS - BLRD-50-438/83-61,
- BLRD-50-439/83-54
- SECOND INTERIM REPORT
.The subject deficiency was initially reported to NRC-0IE Inspector P. E. Fredrickson on November 21,- 1983 in accordance with 10 CPR 50.55(e) y as NCR 2390. This was followed by our interim report dated December 19, 1983. - Enclosed is.our second interim report. We expect to submit our next
- report by ' July. 10,.1984.. We consider 10 CFR Part 21 applicable to this
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- deficiency.-
JIf you have any questions, please get in touch with R. H. Shell-at lFTS 858-2688.
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Very truly yours, e
TENNESSEE VALLEY AUTHORITY L.' M. Mills, Manager Nuclear Licensing L Enc'losure :
oo: : Mr. Richard' C. ' DeYoung,- Director (Enclosure) 0ffice of Inspection and, Enforcement s
U.S. Nuclear Regulatory Commission
, Washington, D.C. ; 20555 -
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Records-Center (Enclosure);
Institute of Nuclear Power Operations e
'1100 rircle.75 Parkway, Suite 1500 m -
' Atlanta,. Georgia. 30339 sf
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ONFICIM COEY
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- 1983-TVA ' 50m ANNIVERSARY l
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' An Equal Opportunity Employer 1
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ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2
'0VERTORQUED STUDS ON BORG-WARNER GATE VALVE MOTOR OPERATORS BLRD-50-438/83-61, BLRD-50-439/83-54 NCR 2390 10 CFR 50.55(e)
SECOND INTERIM REPORT Description of Deficiency The operator studs on the 6-inch 150 lb motor-operated gate valves (which isolate thc auxiliary feedwater (AFW) from' the emergency raw cooling water (ERCW))'cofid not be torqued to the 140-160 ft-lbs specified on Borg-Warner Corporation, (Van Nuys, California) drawing No. 79760. When approximately 70 percent of the recommended torque was applied, the maximum allowable
-yield stress for these studs was exceeded resulting in elongation.
Interim Progress Borg "d ner is continuing their review of the affected drawings to assure that all deficient valves are identified and drawings revised, as required.
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