ML18348A218

License Event Reports 1977-042-00 & 1977-043-00 Re SG Level Indication and Pcs Flow Detection

ML18348A218
Person / Time
Site:	Palisades
Issue date:	09/19/1977
From:	Hoffman D Consumers Power Co
To:	James Keppler NRC/RGN-III
References
LER 1977-042-00, LER 1977-043-00
Download: ML18348A218 (3)

Text

consumers

• Power company General Offices: 212 West Michigan Avenue, Jackson, Michigan 49201

• Area Code 517 788-0550 September 19, 1977

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Mr James G Keppler .' .

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Office of Inspection and Enforcement ~

Region III US Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 DOCKET 50-255 - LICENSE DPR PALIS.A.DES PLANT - ER-77-042 AND ER-77-043 - SG LEVEL INDICATION AND PCS FLOW DETECTION Attached are two reportable occurrences relating to Palisades Plant reactor protective system instrumentation.

David P Hoffman Assistant Nuclear Licensing Administrator CC: ASchwencer,- USNRC

• SEP 21 1977

CONTROL BLOCK:!

eLICENSEE 1 I I I I*

EVENT REPORT A Palisades (Pllne PRINT AU. REQUIRED INFORMATIDNJ 1 6 LICENSEE LICENSE EVENT NAME

• LICENSE NUMBER TYPE TYPE

,fiil I M I I I p I A I L I i I lolol-lololololol-1 ol ol *l411 l1l1l1I Io I 3I

~9 14 15 25 26 30 31 32 REPORT REPORT TYPE. SOURCE DOCKET NUMBER EVENT CATE REPORT CATE

@El CON'T l

• 1-

• I ~ ~ 1°15101~10121 51 51 101s121417171 IOl9lll917l71 7 8 57 58 59 60 ~ 68 69 74 75 80 EVENT DESCRIPTION lol2I !After installation and calibration of new flow transmitters, Channel A indicated ap- I 7 8 9 80 Iola! I proximately 2 percent 'higher* flow than other channels. In particular, Transmitter I 7 8 9 . 80 lol41 I PDT-0112AA read 8 percent higher than other respective transmitters and, therefore, I 7 8 9 80

• joj5j I reportable under TS 6.9.2.b.l. (ER-77-43). I 1 a9

• 80 lfil§J 7 8 9 PRIME 80 SYSTEM CAUSE COMPONENT COMPON8'11T COOE COOE COMPONENT COOE SUPPLIER MANUFACTURER VIOLATION

@0 lrfBI W I r I N I s I TI RI ul l1J I RI 44 3 I7I0I 47 LlLJ 7 8 9 10 11 12 17 43 48 CAUSE DESCRIPTION

• @jfil jNew Rosemont Transmitter S/N 86916 in Position PDT-0112AA apparently loses accuracy I

7 8 9 80 lolsl I when system pressure is increased to 2000 psia. Reason for this behavior is unknown. I 7 8 9 80

~!,Transmitter was replaced.

80 I

• FACILliY METHOO OF STATUS  % POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION fill8 L£J lololol NA 44

[E_J 45 46 NA 80 7 9 10 12 13 FORM OF ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE B))' ~ ~ l._____NA_ ___,...._,..I NA 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION 7

lIEJ8*9Io I ol ol 11 l.&J 12 13 NA 80 PERS'ONNEL INJURIES NUMBER DESCRIPTION rn1010101 NA 7 8 9 11 12 80 PROBABLE CONSEQUENCES l!Jfil None 7 8 9 BO LOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION

~ U_I '----""N=A________________________________________________________~

7 8 9 10 80 PUBLICITY

[ill] None 7 8 9 80

!ADDITIONAL FACTORS 8 NA 7 8 9 80 7

DE89 80

CONTROL BLOCK: I 1

..J.:ICENSEE EVENT REPORT I I I I I 6

(PLIE PRINT ALL REQUIRED INFORMATION]

Palisades

=-

LICENSEE LICENSE EVENT NAME LICENSE NUMBER TYPE TYPE IMIIIPIAILlll lo lo I-lo lo lo lo lo 1-1 ol ol l411l1lil1I Io I 3 I

• 9 14 15 25 26 30 31 32 REPORT REPORT TYPE SOURCE DOCKl;T NUMBER EVENT DATE

• REPORT DATE 7

@ElcoN'T B

T*

57 r* I UJ 58 59 w 60 lo 15 lo I-lo 12151 sl lolsl1l1l1l1I lol2l1l2l1l1I

~ 68 69 74 75 80 EVENT DESCRIPTION IQ[§ I On August 17, 1977, a faulty steam generator level indication for the Reactor Pro-7 8 9 80

@@:]I tective System (RPS); Channel "C," was detected. A loose connection was found in the I 7 8 9 80 I 0141 L.I......;"A:.:...."-=.st.:.e;:;;;a.m=~g;a.e:;;n::.e:;;r::.;a=.t::..:o:::..:r:;._;l:;,:e::..v::..:e::..:l::......:t;:,;r;..:;an:::;:;;s:,::mi;:;;:*:..:t:..::t:.;;e;.;:;r~l:.:::O:.;;;O~p~w~h~i~ch~"""r;::.e:::.SU:::::,l=.t.:;:.e::..d~1=..*ni.;__:a.::.,_3.o.:..,.s....r~o_.h....i...

• g.,.h..._.r...:.e....a...d...,i....p'"lig.._.f'...o""'r-~I 7 8 9 80 lol51 ., the signal at the *RPS. This is a condition less conservative than Technical Specifi- I 7 8 9 80 12:1§] I cations limits and, therefore. reportable under TS 6.9.2.b.l. (F,R 77 42) I 7 8 9 PRIME 80 SYSTEM CAUSE COMPONENT COMPONENT CODE CODE COMPONENT CODE SUPPLIER MANUFACTURER VIOLATION

@El I IjB I ~ I r I N I s I TI RI uj L!J Iz I 9 I 9 I 9 I L!J 7 8 9 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION

~I The current loop resistor connection for the signal to the RPS console was loose, yield] .

7 8 9 80 lolsl I ing a total resistance of approximately 104 ohms. This condi tiori resulted in the sig- I 7 8 9* 80 18)1

~

nal being approximately 3.5% high. The connection was tightened (continued on Line 80 FACILITY METHOD OF STATUS  % POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION l2EJ8 7 9 lEJ 10 I 0 I 0 I 0 12I 13

!cold Shutdown 44

!JU45 46 NA 80 FORM OF ACTIVITY CONTENT rn 7 8 RELEASED l!J 9

OF RELEASE

~I 10 11 AMOUNT OF ACTIVITY NA 44 I 45 NA LOCATION OF RELEASE 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION

[El 10 I 01 01 l_!j NA 7 8 9 11 12 13 80 PERS.ONNEL INJURIES NUMBER DESCRIPTION

[E} jOj OI OI ,_________N_A--------------------~----------------------'

7 8 9 11 12 80 PROBABLE CONSEQUENCES

[IJ~ IA low-level trip would have occurred approximately 3 inches below feed ring center line. I 7 8 9 80 LOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION

[Dfil ~ NA 7 8 9 10 80 PUBLICITY

[iE} None 7 8 9 80 Aornr10NAL FACTORS

~-and similar resistor connections were checked for tightness.

7 8 9 80 7

GE8 9 80