05000316/LER-1978-098-03, /03L-0 on 781010:axial Flux Difference(Afd) Monitoring Alarm Point Was Discovered to Be Set at 103% Vice 84%.Caused by Afd Alarm Trip Point Being Raised for Testing Purposes & Not Returned to Correct Point

/03L-0 on 781010:axial Flux Difference(Afd) Monitoring Alarm Point Was Discovered to Be Set at 103% Vice 84%.Caused by Afd Alarm Trip Point Being Raised for Testing Purposes & Not Returned to Correct Point

ML17317A831
Person / Time
Site:	Cook
Issue date:	12/20/1978
From:	Beilman T INDIANA MICHIGAN POWER CO.
To:
Shared Package
ML17317A823	List: 05000316/LER-1978-091, Forwards LER 78-091/03L-0; 78-092/03L-0/; 78-093/03L-0; 78-094/03L-0; 78-095/03L-0; 78-096/03L-0; 78-097/03L-0; & 78-098/03L-0 05000316/LER-1978-091-03, /03L-0 on 781125:source Range Neutron Flux Channel N-31 Inoperable.Caused by Unclean Connectors on High Voltage Cable & Signal Cable at Prcamp 05000316/LER-1978-092-03, /03L-0 on 781125:reactor Coolant Average Temp on 2 of 4 Loops Below Tech Specs of 541F,resulting in P-12 Permissive Being Actuated.Caused by Turbine Test W/Minimum Steam Dump,Increase Steam Flow Caused Temp Drop 05000316/LER-1978-093-03, /03L-0 on 781125:rod Position Indication(Rpi)For Control Rod H-8 Exceeded 12 Step Limit.Caused by H-8 Drift 05000316/LER-1978-094-03, /03L-0 on 781202:halon Sys for Cable Spreading Area Was Discharged & Therefore Inoperable.Caused by Operator Error 05000316/LER-1978-095-03, /03L-0 on 781206:while Decreasing Turbine Load, Reactor Coolant Average Temp Exceeded 576.2 F.Caused by Faulty Drain Valves on 5-A Heater,Creating Unstable Feedwater Control & Turbine Load 05000316/LER-1978-096-03, /03L-0 on 781209:during Rapid Load Reduction from 100% to 88%,axial Flux Difference Went Outside Target Band. Air Leak on a Condenser Vacuum Breaker Caused Increase in Back Pressure on Main Condenser 05000316/LER-1978-097-03, /03L-0 on 781209:during Rapid Pwr Reduction from 100% to 88%,pwr Pressurizer Pressure Reduced Below Tech Spec Limit of 2220psia.Caused by Rapid Pwr Reduction Because of Decreasing Vacuum on Main Turbine/Generator 05000316/LER-1978-098-03, /03L-0 on 781010:axial Flux Difference(Afd) Monitoring Alarm Point Was Discovered to Be Set at 103% Vice 84%.Caused by Afd Alarm Trip Point Being Raised for Testing Purposes & Not Returned to Correct Point
References
LER-78-098-03L, LER-78-98-3L, NUDOCS 7812270286
Download: ML17317A831 (4)

LER-1978-098, /03L-0 on 781010:axial Flux Difference(Afd) Monitoring Alarm Point Was Discovered to Be Set at 103% Vice 84%.Caused by Afd Alarm Trip Point Being Raised for Testing Purposes & Not Returned to Correct Point

Event date:
Report date:
3161978098R03 - NRC Website

text

NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION LICENSEE EVENT REPORT

'CONTROL BLOCK:

3 Qi

{PLEASE PRINT OR TYPE ALLREQUIRED INFORMATION)

I 6

M 1

D C

C 2

QR 0

0 0

0 0

0 0

0 0

0 0

Q3 4

1 1

1 1 Q4~

QR 7

8 9

LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT 58 4

CON'T

~L~B 0

5 0

0 0

3 1 6Ql 0

1 0

7 8Qsl 2

2 0

7 8 0 SOURCE 7

8 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES 010

~02 TiK AXIALFLUX DIFFERENCE (AFD) 143ÃITORING ALAHH POINT WAS. DISCOVEHED

~03 AT 103 PER CENT VICE 84 PER CEÃZ AS SPECIFIED BY T.S. 3.2.1.

ADDITIONALLY THE ACTION SPECIFIED UNDER T.S. 4.2.1.1.>.2 WAS NOT PERPOHMED AS UIHED UPON

~06

%K AFD ALARM TO OPERABLE STATUS.

~06

~os 7

8 80 7

8 SYSTEM

CAUSE

CAUSE COMP.

VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

~XE Qii iD Q12

~Z, Q13 X

X X

X X

X Q4.

~Z Q>>

~Z Q18 9

10 11 12 13 18 19 20 SEOUENTIAL OCCURRENCE REPORT REVISION LF RIRO EVENT YEAR REPORT NO CODE TYPE NO.

Q11 REPORT

~78

~

~pg 8

~~

~02

+z Q

p 21 22 23 24 26 27 28 29

" 30 31 32 ACTION FUTURE EFFECT SHUTDOWN ATTACHMENT NPRDNI PRIME COMP.

COMPONENT TAKEN ACTION ON PLANT METHOD HOURS Q22 SUBMITTED FORM SUB.

SUPPLIER MANUFACTURER QQQ16 ~H Q19

~Z Q20

~Z Q2 0

0 gQ Q23 gJ Q24

~N Q26 W

1 2

0 Q26 33 34 35 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 o

THE AFD ALARM TRIP POISE WAS RAISED 10 THE NON-CONSERVATIVE VALUE FOR. TES p

DURING A PHEOPERATIONAL TEST.

THE TEST HOWEVER DID NOT CONTAIN PHCICEDURE TO AD3UST AND RESTORE THE ALARM TRIP POINT TO THE REQUIRED VALUE UPON 3

4 COM?Li"TICN.

1HE ALARM TRIP POINT WAS IMMEDIATELYRESTORED TO NORMAL UPON DISCOVERY.

NAME OF PREPARER K'. P. Beilman 7

8 9

FACILITY STATUS 14 POWER OTHER STATUS Q 5

E Q28 ~08 9

Q29 7

8 9

10 12 13 44 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNTOF ACTIVITY CZa W Q33 Q34 NA 7

8 9

10 11 44 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Q39

~00 0

Q31 Z Q38 Mi5 7

8 9

11 12 13 PERSONNEL INJURIES NUMBER DESCRIPTION Q41 ZZ~oo 08 NA 7

8 9

11 12 LOSS OF OR DAMAGE,TOFACILITYQ43 TYPE

DESCRIPTION

Z Q42 NA 7

8 9

10 PUBLICITY ISSUED DESCRIPTION ~P 0

~N44 8

9 10 METHOD OF DISCOVERY DISCOVERY DESCRIPTION Q32

~AQ31 ENGINEERING DI 45 46 LOCATIONOF RELEASE Q 45 80 80 80 80 80 80 Pr0 (~P @Q NRC URR QNLY 68 69; 80 0

PHONE:

h tI

h SUPPLEMEDZ TO LER g78-098/03L-0 SUPPLiKENT TO CAUSE DESCRIPTION AS THE PRHOPERATIONAL TEST WILL NEVER AGAIN BE PERK)RMED, THE AH."iKTi."DTEST WAS NOT BACKFITXED TO ADD IN A DEZAILED PKCEDURE FOR THE AMUSTNEÃZ AND RESTORATICN OF THE SUMECZ ALARMS, THE RESPONSIBLE ENGINEERING SECZION HEAD HAS H"VIEWED THIS EVENT WITH ALL SECTION PERSONNEL.

ADDITIONALLY,A'.Li'ZZER HAS BEEN R1X323TLY SENT TO THE

\\

SECTION HEAD REQUESTING TRAINING ON. SPECIFIC POIÃXS OF THIS EVi'"NT, INCLUDING THE NEED FOR PROMPT OPERATOR NVZXFICATICN~ WHO~ IF PROMPTLY NVZIFIEDI COULD t

POSSIBLY HAVE PERFORMED T.S. 4.2.l.l.a.2 WITHIN THE SPECIFIED TIME LIMIT.