05000315/LER-1979-002-03, /03X-1:on 790127,injection of Boric Acid Caused Increase of Neutron Flux in Reactor Core.Axial Flux Difference Exceed Limits & Alarm Did Not Function Properly. Caused by Hardware Failure

/03X-1:on 790127,injection of Boric Acid Caused Increase of Neutron Flux in Reactor Core.Axial Flux Difference Exceed Limits & Alarm Did Not Function Properly. Caused by Hardware Failure

ML17318A414
Person / Time
Site:	Cook
Issue date:	11/13/1979
From:	Delong S INDIANA MICHIGAN POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17318A415	List: 05000315/LER-1979-002-03, /03X-1:on 790127,injection of Boric Acid Caused Increase of Neutron Flux in Reactor Core.Axial Flux Difference Exceed Limits & Alarm Did Not Function Properly. Caused by Hardware Failure 05000315/LER-1979-055-03, /03L-0:on 791013,while Performing 18 Month Visual Insp,Several Fire Penetration Barriers Identified as Nonfunctional.Investigation & Corrective Action Continuing Rept Will Be Submitted ML17326A348
References
LER-79-002-03X, LER-79-2-3X, NUDOCS 7911190378
Download: ML17318A414 (2)

LER-1979-002, /03X-1:on 790127,injection of Boric Acid Caused Increase of Neutron Flux in Reactor Core.Axial Flux Difference Exceed Limits & Alarm Did Not Function Properly. Caused by Hardware Failure

Event date:
Report date:
3151979002R03 - NRC Website

text

REGULATORY 1PRNATI ON DISTRIBUTION SYS' (RIBS)

ACCESSION NBR:7911190378 DOC ~ DATE: 79/11/13 NOTARIZED:

NO DOCKET FACIL:50 315 Donald C.

Cook Nuclear Power Pl ant r Vni t 1r Indiana 8

05000313 ADTH,NAME AU'THOR AFFILIATION DELOAYrS,DE Indiana 8 Michigan Power Co ~

RECYP INANE RECIPIkNT AFF ILlATION Region 3~ Chic'agor Office of the Director

SUBJECT:

LER 79-002/03X-1;on 790127rinjection of boric acid caused increase of neutron flux in reactor core, Axial flux differerice exceed limits 8 alarm did not function properly, Caused by hardware failure, DISTRIBUTION CODEe AOO?S COPIES RECEIVEDeLTR ENCL SIZEe TITLE: Incident Reports'S CQ ~

O T E 8 R meaywweeyewmwwreeeeawmmeeweewewoew WWWIAf0%MW RECIPIENT ID CODE/NAME ACTION~

05 BC INTERNAL: 0}

REG FILE 09 ILE 14 TA/EDO 16 EEB 18 PLANT SYS BR 20 AD Pl AN'T SY8 23 ENGR 8R

?5 PWR SYS BR 27 OPERA LIC BR 29 AUX SYS UR'ANAUERrS

~

TMI"H STREET EXTERNAL: 03 LPDR 29 ACRS COPIES LT'TR ENCL 4

1 2

2 1

1 1

1 i

1 1

1 1

1 1

1 i

1 1

1 1

1 1

1 16 16 RECIPIENT ID CODE/NAME 02 NRC PDR 11 MPA 15 NOVAK/KNIEL 17 AD FOR ENGR 19 I8C SYS BR 22 REAC SAFT BR 24 KREGER 26 AD/SITE ANAL 28 ACDENT ANLYS E JORDAN/IE STS GROUP LEADR 04 NSIC COPIES LTTR ENCL 1

1 3

3 1

1 i

i i

i 1

1 1

i 1

1 i

1 1

TOTAL NUMBER OF COPIES REQUIRED'TTR 48 ENCL 48

1 W

II If I