05000305/LER-1981-018-03, /03L-0:on 810516,testing Indicated That Low Pressure Safety Injection & Reactor Trip Were Below Tech Spec Limits for Pressure Transmitters.Caused by Instrument Drift.Sensing Lines Flushed.Amplifier Replaced

From kanterella
(Redirected from ML20009B538)
Jump to navigation Jump to search
/03L-0:on 810516,testing Indicated That Low Pressure Safety Injection & Reactor Trip Were Below Tech Spec Limits for Pressure Transmitters.Caused by Instrument Drift.Sensing Lines Flushed.Amplifier Replaced
ML20009B538
Person / Time
Site: Kewaunee 
Issue date: 06/15/1981
From: Molzahn D
WISCONSIN PUBLIC SERVICE CORP.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20009B532 List:
References
LER-81-018-03L, LER-81-18-3L, NUDOCS 8107160249
Download: ML20009B538 (2)
v • d • e


LER-1981-018, /03L-0:on 810516,testing Indicated That Low Pressure Safety Injection & Reactor Trip Were Below Tech Spec Limits for Pressure Transmitters.Caused by Instrument Drift.Sensing Lines Flushed.Amplifier Replaced
Event date:
Report date:
3051981018R03 - NRC Website
v • d • e

text

-e -

NRC FORM 366 U. S. NUCLEAR REGULATORY COMMIS; ON (7 77I *I LICENSEE EVENT REPORT CONTROL BLOCK: l l

l l

l l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6

l o l t l lW l I l K lN lP l 1 l@15l0 l0 l-l0 l0,l0 l0 ] 0l-l0 l0 l@l 4l 1l 1l 1l 1l@l l

lg 7

8 9 LICENSEE CODE 14 LICf.JSE NUMBER 25 26 LICENSE TYPE JO 57 CAT 68 CON'T lOlil 5$RCE d l0 15 10 10 10 13 10 15 l@ l0 15 11 16 18 11 @ l0 16 Il 15 18 Il l@

7 8

60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBACLE CONSEQUENCES h O 2 lDuring refueling outage, surveillance testing indicated that one of three pressurizer i i o 13 l l pressure transmitters was out of calibration such that its lo-pressure safety in-l ljection and its lo-pressure reactor trip would have occurred 12.62% lower and 12.67%

l o 4 lo Is] l lower than the Tech. Spec. specified values respectively. This placed the facility l

l o 161 lunder reporting requirement of T.S. 3.5a.

The remaining two channels were operable l

l0171 Iwithin specified limits and would have initiated safety injection or a reactor trin l

I O la l las required. There was no effect on plant operation or coolic safety.

1 80 7

8 9 C DE CODE SU8C E COMPONENT CODE SUBCOdE SU E

10l9l lIIAlh W h lZlh lI lN lS l T l R l U l@ (_T_jh W h 7

8 9

10 11 12 13 18 19 20 SEQUENTIAL OCCUR RENCE REPORT REVISION LER RO EVENT YEAR 9 EPORT NO.

CODE TYPE NO,

@, REPORT l8 l ll l-l

} 0 l ll 8J l0l3l [L_j l-_]

l0l u BE

_ 21 22 23 24 26 27 28 29 30 31 32 AK AC ON PL NT T

HOURS S8 IT FOR b B.

SUPPLIE MA FACTURER LI]@lz_l@

12 _l @

LzJO I o I 01 o l o l Lal@

LE]@

LE]@

l r 11 I 8 l O l@

33 34 35 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h L' LO_j l SEE ATTACHED SHEET.

I 11 111 1 I

i 2 l

l i 3 l

l l i l41 1 I

7 8 9 80 ST S

% POWER OTHERFr.TU3 dis O RY DISCOVERY DESCRIPTION li l51 ljLl @ l O! 01 Ol @ lNA l

l lhi Surva4111mra eaaring l

ACTIVITY CO TENT RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE [1_j6] h__] @ [Z_j@lNA l

l NA l

7 8 9 to 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE

DESCRIPTION

L'_LJ l 01010 l@LZ_J@l NA l

,EnSONNA%ukS NUMBER

DESCRIPTION

10 l 010 l@l NA l

i a 7

8 9 11 12 80 LOSS OF OR DAMAGE TO FACILITY TYPE

DESCRIPTION

W@l NA l

1 9 7

8 8107160249 810612 ISSUE @ DESCRIPTION h p

PDR ADOCK 05000305 NPC USE ONLY l MA S

PDR l

; ; ; ; gg;yll;lg 2 o F

8 9 10 68 69 80 g

.t 5 NO MGM

{

NAME OF PREPARER ggpone:

3 Docket 50-305 LER 81-018 Supplemental Information - Item 27 Cause, Description and Corrective Actions Instrument drif t appears to have caused the transmitter to be out of cali-b ration. However, a 13% drif t would have caused a 100 psig difference in pressure readings in the control room. This would have exceeded the maximum allowed difference between transmitters permitted by our daily surveillance check.

.1 review of the daily lots showed that 100 psig difference did not exist during operations.

The direct cause of the drif t cannot be identified, but we conclude tne shutdown to refueling conditions was indirectly responsible. The sensing lines were flushed, the amplifier replaced, and the transmitter recalibrated with no indications of failure.

rJUN 15 1981

Retrieved from "https://kanterella.com/w/index.php?title=05000305/LER-1981-018-03,_/03L-0:on_810516,testing_Indicated_That_Low_Pressure_Safety_Injection_%26_Reactor_Trip_Were_Below_Tech_Spec_Limits_for_Pressure_Transmitters.Caused_by_Instrument_Drift.Sensing_Lines_Flushed.Amplifier_Replaced&oldid=4656859"