ML20092A665
| ML20092A665 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 04/30/1984 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8406190302 | |
| Download: ML20092A665 (2) | |
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TENNESSEE VALLEY AUTHORITY' ""
o CHATTANOOGA. TENNESSEE 374ot 1100 Chestnut Street Tower II
'3 Pl2 : 4 5 April 30, 198 4 BLRD-50-438/84-29 BLRD-50-439/84 U.S. Nuclear Regulatory Commission Region II Attn:
Mr. James P. O'Reilly, Regional Administrator 101 Marietta Street, NW, Suite 2900 Atlanta, ~ Georgia 30303
Dear Mr. OReilly:
BELLEFONTE NUCLEAR PLANTS UNC' ' "") 2 - REQUIRED 1-INCH SEPARATION OF
. FLEX. CONDUIT NOT MAINTAINED BLRD-M438/84-29, BLRD-50-439/84 FIRST INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector Ross Butcher on April 3,1984 in accordance with 10 CFR 50.55(e) as NCR 2995.. Enclosed is our first interim report. We expect to submit our next report by September 12, 1984.
If you have -any questions,' please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY L. M. Mills, nager Nuclea-Licensing Enclosure
- cc :
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement
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U.S. Nuolear Regulatory Commission
-Washington, D.C.
20555 l
Records Center (Enclosure)'
Institute of Nuclear Power Operations 1100. Circle 75 Parkway, Suite 1500 l
Atlanta,. Georgia. 30339 8406190302 840430
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gDRADOCK 05000438 PDR OFFICig,0%
1983-TVA 5OTH ANNIVERSARY j
An Equal Opportunity Employer l\\
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ENCLOSURE s
BELLEFONTE NUCLEAR PLANTS UNITS 1 AND 2
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REQUIRED 1-INCH SEPARATION OF FLEX CONDUIT NOT MAINTAINED BLRD-50-438/84-29, BLRD-50-439/84-28 NCR 2995 10 CFR 50.55(e)
FIRST INTERIM REPORT Description of Deficiency Flex conduits 1A3-2049 and 1 A2-2024-A in the auxiliary building do not have a 1-inch separation as required by Bellefonte drawing SAWO818-RU-1 R15.
Drawing note 22 on drawing 5AWO818-RU-1 R15 requires that a 1-inch minimum separation distance be maintained between conduits of different trains, and states that noncombustible spacers may be used to maintain this minimum
- separation distance. Design details for noncombustible spacers exist only for 3-inch flexible conduit in the reactor building. This detail was the result of field change request E-3124 and does not apply to other areas of the plant or other size flexible conduit.
TVA General Construction Specification G-40 (G-40), paragraph 3.2.6.2.1(a) t requires that flexible conduit installations "contain enough slack to form a l
1-inch loop at midpoint between couplings,~ or to permit displacement of a minimum of 1-inch between centerlines of couplinga." The apparent cause of this deficiency is that due to the G-40 requirement and the movable nature of flexible conduit, cable pulling, and other construction activities may cause s
movement b1 the conduits. Without spacers to maintain the required 1-inch separation, conduits in close proximity to others may move to less than 1-inch of one another.
Interim Progress Nonconformance report 2995 has been submitted to TVA's D'ivision of Engineering Design for determination of corrective action and: evaluation of the generic implications and action required to prevent recurrence.
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