ML17252B480

LER 76-060-00 for Dresden Units 2 and 3 Re Discovery of Water Leakage in Diesel Generator Room Led Identification of Small Hole in HPCI Test Return Line at Condensate Storage Tank

ML17252B480
Person / Time
Site:	Dresden
Issue date:	10/05/1976
From:	Stephenson B Commonwealth Edison Co
To:	James Keppler NRC/RGN-III
References
BBS LTR 76-707 LER 76-060-00
Download: ML17252B480 (3)

Text

R.R. #1 Morris, Illinois 60450 Telephone 815/942-2920 Edison

. , Dresden Nuelear rower Station BBS Ltr. #76-707 October 5, 1976 Mr. James G. Keppler, Regional Director Director~te of Regulatory Operations-Region III U. S. Nuclear .Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137

REFERENCE:

Docket No. 50-237 and Docket No. 50-249 Enclosed please find Reportable Occurrence report number 50-237/1976-60.

This report is being submitted to your office in accord.ance with the Dresden Nuclear P6wer St~tion Te~hnical Specifications, Section,6.6.~.

~~*Station Superintendent Dresden Nuclear Power Station BBS :jo Enclosure cc: Director of .Inspection & Enforcement Director of ~nagement Information & Program Control File/NRG R£GUU\l0Rl DOClH FILE COPl 1*02G6

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• LICENSEE LICENSE EVENT ....

. NAME LICENSE. NUMBER TYPE TYPE

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• 7 8 9 14 15 25 26 30 REPORT REPORT CATEGORY . TYPE. SOURCE DOCKET NUMBER EVENT DATE REPORT DATE

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. 80 (ol6l * £ J.,JN£d IS* ND~fYIALl-'/ !SOL,A.TE'P Tl-1£ HPC/ SYSIFIYI E'X.C£PT WHEN USED 7 8 9 PRME (<;EC PtTT;tl;(.HfJ) SW£E!T.

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• COMPON°ENT COMPONENT CODE *. COOE . : COMPONENT CODE SUPPLIER* MANUFACTURER VIOLATON

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EVENT DESCRIPTION (Continued) for flow testing. The line was subsequently taken out of service. A leak in the Unit-2 HPCI test return line was discovered on 9-15-76. (50-237/1976-60)

CAUSE DESCRIPTION (Continued) resulted in failure of the pipe wall. The affec~ed area, which was less than

~" in diameter, was temporarily. repaired. To prevent future corrosion, this section of line will be replaced and fitted with a different type of insul-ation as soon as practicable.