ML20040C346

Updated LER 81-001/03X-1:on 810112,routine Sampling Bit & North Bast Revealed Boron Concentration in Both Tanks Below Tech Spec Limit.Caused by Leaking of Bit Inlet Valves, IMP-255 & IMO-256,causing Dilution of Bit

ML20040C346
Person / Time
Site:	Cook
Issue date:	01/19/1982
From:	Don Krause INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20040C338	List: ML20040C337 ML20040C341 ML20040C346 ML20040C349
References
LER-81-001-03X, LER-81-1-3X, NUDOCS 8201270554
Download: ML20040C346 (1)

Text

NRC FORPA 366 U. S. NUCLEAR HEGULATORY COMMISSION u.m *

• UPDATE REPORT - PREVIOUS REPORT DATE 2/13/81

. LICENSEE EVENT REPORT CONTROL BLOCK: l l l l l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6 l o l 8i 9l l MLICENSEE l l I l DCODE l C l C l 1 l@15l010l01010l0l0l0101010l@l4Il1111l11@l 14 LICENSE NUMBER 25 26 LICENSE TYPE JO i

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14 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h I O I 21 i UNIT WAS IN MODE 1 AT 100% POWER. AT 1100 HOUR 3. ROUTINE SAMPL I".G OF RIT AND NORTH I iO i3l l BAST REVEALED THE BORON CONCENTRATION IN BOTH TANKS WAS 19,300 PPM. THIS IS BELOW I 1014 l l THE 20,000 PPM LOWER CONCENTRATION PERMITTED BY T.S. 3.5.4.1B. ACTION ITEM 0F T.S. I I o I s ! I WAS FULFILLED. BIT AND MIDDLE BAST WERE ABOVE 20.000 PPM AT 1326 HOURS. TdERE WAS l O e iNO EFFECT ON THE HEALTH AND SAFETY OF THE PUBLIC. I 10171 1 I I O 18 I l _l

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44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONb h Ii10II PREVIOUS REVISION OF LER STATED INVESTIGATION WAS CONTINUING. THE BIT INLET VALVES,_j ii lil i IM0-255 AND IM0-256. WERE LEAKING THROUGH CAUSING THE DILUTION OF THE BIT. MAIN- I lil2l l TENANCE LAPPED DISC'S ON BOTH VALVES AND REPACKED IM0-256. DOWNSTREAM DISC WAS l NO FURTHER DILUTION I Lt w l RESURFACED ON BOTH VALVES. JOB ORDER WAS COMPLETED ON 7-10-81.

I i 14 l l PROBLEMS HAVE OCCURRED. INVESTIGATION IS CLOSED. I ST S  % POWE R OTHE R STATUS IS OV RY DISCOVERY DESCRIPT'ON 32

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