IR 05000259/1976016

Further Responding to Letter of 8/3/1976, Referring to IE Inspection Reports for 50-259/76-16, 50-260/76-16, 50-296/76-12, Letter Advising Cable Trays Carrying safety-related Control & Signal Cables Are Loaded to Max. of 60% by Volume

ML18283B612
Person / Time
Site:	Browns Ferry
Issue date:	09/08/1976
From:	Gilleland J Tennessee Valley Authority
To:	Moseley N NRC/RGN-II
References
IR 1976012, IR 1976016
Download: ML18283B612 (3)

Text

Oi~JTtO+6~'~>S-is<~830 Power Building TENNESSEE VALLEY AUT.HORITY CHATTANOOGA.

TENNESSEE 37401 September 8, 1976~mC;<~/a/SF Hr.Norman C.Moseley, Directox Office of Inspect:ion and Enforcement U.S.Nuclear Regulatory Commission Region XX-Suite 818 230 Peachtree Street, NH.Atlanta, Georgia 30303

Dear Mr.Hoseley:

This is in further response to your August 3, 1976, letter, IH:XX:BJC 50-259/76-16;-

50-260/76-16, 50-296/76-12, concerning certain activities at Browns Ferry Nucleax Plant units 1 and 2 which appeared to deviate from commitments made to the NRC.On August 5, 1976, we submitted a partial response, J.E.Gilleland to N.C.Moseley, regarding proprietary material in the inspection report;this letter is to respond to Deviations cited in the inspection report.'The Deviations of the subject inspection report are xelated to our criteria on cable fi11.He wrote to you on this subject on July 15, 1976, J.H.Gilleland to Norman C.Moseley'.Again, we would like to point out that cable trays carrying safety-related control and signal cables axe loaded to a maximum of 60 pexcent by volume of the cross-sectional area of the tray.,'"Deviati'ons The inspector found that...there are trays filled'bove level full in Units 1 and 2 at elevations 565 and 593.Cable tray SD xunni'ng parallel to the south wall of the'able spreading room was the only tray that was filled above the'side rails for the length of the cable spreading room.~Res oese TVA.has revi'ewed the tray fill at elevation'565 in unit 1;none.exceeds 60 percent by volume of, the cross<<sectional area.TVA has xeviewed the tray-.fill at elevation 593 in unit 1.The.cables in trays HXZSXX, FX, and HHFSXI do not exceed 60 percent by volume of the cross-sectional area..Tray KT, which is not safety related, exceeds the fill criterion by three percent.This was necessary because of the'special routing of these non-'safety-related cables.This deviation was analyzed and TVA has concluded that it has no adverse effect on the safety-related systems.An Equal Opportunity Employer iC--i+i (Ql<Qi Mr.Norman C., Moseley September 8,, 1976'TVA has reviewed the tray fill at elevations 565 and 593 in unit 2;none exceeds 60 percent by volume of the cross-sectional area.TVA has reviewed the tray fill of cable tray SD in the'able Spreading Room;it does not exceed 60 percent by volume of the cross-sectional area.Very truly ours,