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 Mr James G Keppler Office of Inspection and Enforcement Region III US Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 DOCKET 50-255 -LICENSE DPR-20 -PALIS.A.DES PLANT -ER-77-042 AND ER-77-043

-SG LEVEL INDICATION AND PCS FLOW DETECTION

... .' . . /\. :*,\' " I . ',, .\ \ 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

,-LICENSEE EVENT REPORT CONTROL BLOCK:! 1 e A Palisades 1 I I I I * (Pllne PRINT AU. REQUIRED INFORMATIDNJ LICENSEE NAME ,fiil I M I I I p I A I L I i I 14 6 LICENSE

• LICENSE NUMBER TYPE lolol-lololololol-1 ol ol *l411 l1l1l1I 15 25 26 30 DOCKET NUMBER EVENT CATE EVENT TYPE Io I 3 I 31 32 REPORT CATE @El CON'T l

• 1-* I 7 8 57 58 REPORT TYPE. REPORT SOURCE 51 51 101s121417171 IOl9lll917l71 59 60 68 69 74 75 80 EVENT DESCRIPTION lol2I !After installation and calibration of new flow transmitters, Channel A indicated ap-7 8 9 Iola! I proximately 2 percent 'higher* flow than other channels.

In particular, Transmitter 7 8 9 . lol41 I PDT-0112AA read 8 percent higher than other respective transmitters and, therefore, 7 8 9 *joj5j I reportable under TS 6.9.2.b.l. (ER-77-43).

1 a 9

• lfil§J 7 8 9 SYSTEM COOE @0 lrfBI CAUSE COOE COMPONENT COOE W I r I N I s I TI RI ul 7 8 9 10 11 12 17 CAUSE DESCRIPTION PRIME COMPONENT SUPPLIER l1J 43 COMPON8'11T MANUFACTURER I RI 3 I 7 I 0 I 44 47 VIOLATION LlLJ 48 *@jfil jNew Rosemont Transmitter S/N 86916 in Position PDT-0112AA apparently loses accuracy 7 8 9 lolsl I when system pressure is increased to 2000 psia. 7 8 9 was replaced.

• FACILliY STATUS % POWER fill L£J lololol 7 8 9 10 12 13 FORM OF ACTIVITY CONTENT OTHER STATUS NA RELEASED OF RELEASE AMOUNT OF ACTIVITY 44 METHOO OF DISCOVERY

[E_J 45 B]]' l.__ ___ NA __ __,...._,..

I 7 8 9 10 11 44 45 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION lIEJ Io I ol ol l.&J NA 7 8*9 11 12 13 PERS'ONNEL INJURIES NUMBER DESCRIPTION rn1010101 NA 7 8 9 11 12 PROBABLE CONSEQUENCES l!Jfil None 7 8 9 LOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION Reason for this behavior is unknown. DISCOVERY DESCRIPTION NA 46 LOCATION OF RELEASE NA I 80 I 80 I 80 I 80 80 I 80 I 80 I 80 80 80 80 80 BO U_I '----""N=A

________________________________________________________ 7 8 9 10 80 PUBLICITY

[ill] 7 8 9 ,!ADDITIONAL 8 7 8 9 DE 7 89 None FACTORS NA 80 80 80 CONTROL BLOCK: I 1 ..J.:ICENSEE EVENT REPORT =-* Palisades I I I I I (PLIE PRINT ALL REQUIRED INFORMATION]

LICENSEE NAME *IMIIIPIAILlll 9 14 REPORT TYPE 6 LICENSE NUMBER lo lo I-lo lo lo lo lo 1-1 ol ol 15 25 REPORT SOURCE DOCKl;T NUMBER LICENSE TYPE l411l1lil1I 26 30 EVENT DATE EVENT TYPE Io I 3 I 31 32

• REPORT DATE @ElcoN'T T

• r* I 7 B 57 58 UJ w lo 15 lo I-lo 12151 sl lolsl1l1l1l1I lol2l1l2l1l1I 59 60 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:.:...."-=.s ni.;__:a.::.,_3.o.:..,.

s .... _.h .... i ...

• g.,.h..._.r...:.e

.... a ... d...,i .... p'"lig.._.f'

... 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 CODE @El I IjB I 7 8 9 10 CAUSE CODE 11 CAUSE DESCRIPTION COMPONENT CODE I r I N I s I TI RI uj 12 17 COMPONENT SUPPLIER L!J 43 COMPONENT MANUFACTURER I z I 9 I 9 I 9 I 44 47 VIOLATION L!J 48 The current loop resistor connection for the signal to the RPS console was loose, yield] . 80 This condi tiori resulted in the sig-I 7 8 9 lolsl I ing a total resistance of approximately 7 8 9* nal being approximately 3.5% high. The FACILITY STATUS % POWER OTHER STATUS l2EJ lEJ I 0 I 0 I 0 I !cold Shutdown 7 8 9 10 12 13 44 FORM OF ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITY I rn l!J NA 7 8 9 10 11 44 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION

[El 10 I 01 01 l_!j NA 7 8 9 11 12 13 PERS.ONNEL INJURIES NUMBER DESCRIPTION 104 ohms. connection METHOD OF DISCOVERY

!JU 45 46 45 80 was tightened (continued on Line 18)1 DISCOVERY DESCRIPTION NA LOCATION OF RELEASE NA 80 80 80 80 [E} jOj OI OI ,__ _______ 7 8 9 11 12 PROBABLE CONSEQUENCES I A low-level trip would have 7 8 9 LOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION

[Dfil NA 7 8 9 10 PUBLICITY

[iE} None 7 8 9 Aornr10NAL FACTORS 80 occurred approximately 3 inches below feed ring center line. I 80 80 80 similar resistor connections were checked for tightness. 7 8 9 80 GE 7 8 9 80