ML20105B639
| ML20105B639 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 01/10/1985 |
| From: | Hufham J TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8502070400 | |
| Download: ML20105B639 (2) | |
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TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 37401 400 Chestnut Street Tower II 85 J AN l4Ja8ukdy 06 1985 EBLRD-50-438/85-03
- BLRD-50-439/85-03
,, U.S.-_ Nuclear Regulatory Commission Region II Attn:. Mr. James P. O'Reilly, Regional Administrator 101 Marietta Street, NW, Suite 2900
. Atlanta,, Georgia 30323
Dear Mr. O'Reilly:
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!BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - POTENTIAL DEFICIENCY IN IMPROPERLY RATED FIELD WIRING TO SOLENOID VALVES - BLRD-50-438/85-03, BLRD-50-439/85-
~ 103 - FIRST INTERIM REPORT
!The subject deficiency was initially reported to NRC-0IE Inspector 4
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- A. Ignatonia 'on December?13, ' 1984 in accordance with 10 CFR 50.55(e) as
'NCR BLN EBB 8413. Enclosed is our first interim report. We expect to
- submit our;next. report by October 22, 1985.
k Iffyou ha've any questions, please get in touch with R. H. Shell at FTS 858-2688.
s Very truly yours, c-TENNESSEE VALLEY A'JrHORITY '
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W.~Hufh
, Manager IL oensing
$ Regulations
. Enclosure
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Mr. Richard C. DeYoung, Director (Enclosure) s
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- Office -of' Inspection and Enforcoment U.S. Nuclear Regulatory Commission Washington, D.C.
20555
' Records Center (Enclosure)
. Institute of-Nuolear Power Operations 1100 circle 75 Parkway, suite'1500 Atlanta, Georgia 30339 s
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s An Equal Opportunity Employer
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ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 POTENTIAL DEFICIENCY IN IMPROPERLY RATED FIELD WIRING TO SOLENOID VALVES BLRD-50-438/85-03, BLRD-50-439/85-03 NCR BLN EEB 8418 10 CPR 50.55(e)
FIRST INTERIM REPORT Description of Deficiency
~ A deficiency has been identified at Bellefonte Nuclear Plant (BLN) involving field-installed electrical cables. Specific liy, field wiring that
- terminates within the housing of certain solenoid valves has insulation which is not rated for temperatures which could possibly be generated within the
. valves. This condition was originally identified in NRC-0IE Information Notice 84-68.
- Two manufacturers of solenoid valves procured by TVA for BLN and requirict field wiring to terminate within the housing are Target Rock and Valcor.
- These valves have been identified as having potential internal temperatures reaching 280 F.
TVA presently uses wire with insulation rated at either 90 C (194 F) or 125 C (257 F) to terminate solenoid valves. Solenoid valves from other manufacturers procured by TVA which do not have vendor-supplied pigtails could also be affected.
This condition has also been identified for Watts Bar Nuclear Plant (WBN) and is being separately. reported as nonconformance report (NCR) WBN EEB 8425.
Interim Progress TVA is in the process of investigating the subject deficiency. Further information will be provided in our next report.
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