ML20147A852

LER #78-061/03L-0 on 780802:Rpts While in Hot Standby Above P-11,pressurizer Level Indication Channel 3 Found to Be Different from Other Channels.Caused by Gas Pocket in Sensing Line.(Encl to 7809190315)

ML20147A852
Person / Time
Site:	Cook
Issue date:	09/12/1978
From:	Rischling J INDIANA MICHIGAN POWER CO.
To:
References
LER-78-061-03L, LER-78-61-3L, NUDOCS 7809190327
Download: ML20147A852 (1)

Text

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WRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION (7-77b

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? 8 60 61 DOCKET NUMBER 68 69 EVENT DATE REPORT DATE EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES h 1Ol2l l DURING A WORK ORDER REVIEW ON AUGUST 14 IT WAS DISCOVERED THAT WHILE IN HOP STANDBY I

o i3; l ABOVE P-11, PRESSURIZER LEVEL INDICATIN CHANNEL III (NLP-153) NAS EDUND 10 BE l l l O I 4 I l SIGNIFICANTLY DIFFERENT FROM THE OTHER CHANNELS. THIS WAS NON-CONSERVATIVE IN l 1o;3; ; RESPECT TO T.S. TABLE 3.3-3 ITEM 1.d. THE APPEPRIATE ACTIm REQUIREMENTS WERE l

,  ; o ; c j l FULFTT. ten. . PREVIOUS OCCURRENCES INCEDE: 050-315/78-41, 10, 77-41, 316/78-44,6. I 10 l 7 ] l J l O lsl l ._!

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31 41 LaJ@ LaJ@ I n I o I a I 47o l@ r 42 43 44 E CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h I i l O ] l INVESTIGATION REVEALED THAT A GAS POCKLT WAS IN THE SENSING LINE. THE SENSING LINE l l g i i i ; lWAS REFILLED TO REtOVE THE GASES. UPON RETURNING 7HE WANNEL 70 SERVICE, ALL I j

[CHANNEIS AGREED. A DESIGN CHANGC (12-1598) -HAS BEEN INITIATED TO STUDY THE

,, ,3 y l PIPING FOR THE SENSING LINES AND MAKE THE NECESSARY CHANGES. l 11141I I 7 8 9 80

$  % POWER OTHER ST AT US ISCO RY DISCOVERY DESCRIPTION LU_s_I LD_j @ l 01 0l 0l @ l NA l l B l@l OPERATOR OBSERVATION l A TIVITY CO TENT '

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PERSONd'iN3u'JiES  :

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l LU2Ll 7 H D l 0101018L 11 12 NA 80 LOSS OF OR DAMAGE TO FACILITY + l TYPE DE SCHIP TION NA l IilTiiLz_J@l 7 8 9 '10 80 SCHiPTION f, .

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7- n 9= to 68 69 80 $

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REPARER Jack Rischlinct prong; 616-465-5901 {

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