ML20099K038
| ML20099K038 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 11/05/1984 |
| From: | Hufham J TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8411290290 | |
| Download: ML20099K038 (2) | |
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TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 37401 400 Chestnut Street Tower II b N fhemhef 5,0 684 BLRD-50-438/84-51 BLRD-50-439/84-47 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:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - MISINTERPRETATION OF SUPPORT SPACING REQUIREMENTS - BLRD-50-438/84-51, BLRD-50-439/84 FIRST INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector P. E. Fredrickson on October 5,1984 in accordance with 10 CFR 50.55(e) as NCR 3492. Enclosed is our first interim report. We expect to submit our next report on er about February 13, 1985.
If you have any questions, please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY W
J._W. Hufham, Manager Licensing and Regulations Enclosure cc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Cummission Washington, D.C.
20555 Records Center (Enclosure)
Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 OFFICIAL COPY w..
8411290290 g41105
{0RADOCK 05000438 Jg6 PDR q.
An Equal Opportunity Employer
ENCLOSURE
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BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 MISINTERPRETATION OF SUPPORT SPACING REQUIREMENTS NCR 3492 BLRD-50-438/84-51, BLRD-50-439/84-47 10 CFR 50.55(e)
FIRST INTERIM REPORT Description of Deficiency Seismic cable tray supports at Bellefonte Nuclear Plant (BLN) have been located and installed by measurement of the distance between the inside edges of the support brackets. The supports should have been located by measurement of the distance between the center lines of the support brackets. BLN Design Criteria N4-50-D78 and various cable tray support drawings (X2 series) require a maximum of 8 feet of separation between supports. Additionally, BLN FSAR Section 310 3.1 states that cable tray supports will be spaced at a " maximum of 8 feet on centers." This condition has resulted in a center line to center line dimension in excess of 8 feet in some cases.
TVA has determined that the apparent cause of this deficiency was BLN Construction Engineering's interpretation of the applicable design criteria.
This interpretation resulted in the determination that the measurement was to be made between the inside edges of the support brackets.
Interim Progress The subject nonconformance report (NCR) has been forwarded to TVA's Office of Engineering (OE) for disposition. TVA is still in the process of investigating this condition.
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