ML19270F333

LER 79-006/03L-0:on 790105,reviewer Noted 781228 Record of Continuous Alarm at Contact Data Record Point F018.Panel C4705 Not Reset.Caused by Failure of Indicator Lights on Panel C4705.Panel Reset,Clearing F018.Surveillance Modified

ML19270F333
Person / Time
Site:	Davis Besse
Issue date:	01/31/1979
From:	Chesko R TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19270F330	List: ML19270F329 ML19270F333
References
LER-79-006-03L, LER-79-6-3L, NP-33-79-09, NP-33-79-9, NUDOCS 7902060269
Download: ML19270F333 (3)

Text

' '

NRC F ORM 366 (7 77)

LICENSEE EVENT REPORT CONTROL BLOCK: l l l l l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6 1 Ql 0l 0 -l DjLfCENSE 0 N} Pl Fj -l Ol 3 @[4 l1LICEN3E l1 l1liPE l140@l l@

l lo 1 l0 lH lD lU lS 14 IS %YnH d 2ti $1 w A T SS 7 8 9 LICENSEE CODE CON'T 0 t s R l l 5 l0 l- l0 l3 l 4 l66dl@l0 63 l1EVENT l0 Dl5ATEl 7 l9 @l0 l1REPORT 74 75 l3 l1DAN! 7 lo80!@

7 d u3 (s 1 D')CK E T NUVE ER EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES h l o l 2 l l While reviewing ST 5016.03, Non-supervised Fire Alarm Circuit Checks on 1/5/79, the g 3 g designated reviewer noted that a deficiency had been written on 12/2',/78 stating l g

that Contact Data Logger Point F018 was in continuous alarm. This implied that F018 l a l l

ya y3; , was receiving a false alarm signal and the fire detector should have been declared No fires occurred in containment during the time that Panel C4705 was ]

0 6l L noperable. i not reset. In addition, Panel C4709 was operable and could alarm locally. l jol7ll l

g , ; (NP-33-79-09) 80 7 8 9 COUP. VALVE SYSTE*M CAUSE C A US E CO'APONENT CODE SU8 CODE SU3 CODE CODE CCCE SU8CCDE lo[9l 8 l A lB l@ lE l@

3 to 11 12 E

@ lIlNlS TlRlUl@ ] @ Zl@

13 18 13 20 RE VISION 7

SEQUENTI AL OCCU R R E N CE REPORT COCE TYPE N O.

_ EVENT YE AR R E'OH T NO.

L E R Fs O 7l9l l_l l0lDj6l j,-l 0l3J lL l _l 0l

@ REeoRT 23 24 26 21 26 2) 3J 3\ 32

_ 21 22 HOURS 22 5 8 si FOI EU B . S PLIE VAN AC JREH AT C PLAf T TH t TAK5 Z lZlg l0 l0 l0 lv 40l lY glg lAglJ 0l7l3 g I33A l@ J4G lg l35 g Ju 3? 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h Panel l

, o l The f ailure of the indicating lights prevented personnel from knowing that C4705 needed to be reset. Panel C4705 was reset, clearing F018 and removing the unit from the Action Statement of Technical Specification 3.3.3.8.a. Surveillance Test j

, 7 g j

,,,, [ ST 5016.03 has been modified to identify Technical Specification alarms and add a

, , g lamp test. 80 7 8 9 OTHEH STATUS SCOV Y DISCOVERY DESCRIPTION STA S *PCnFR NA l B l@l Designated Reviewer's review of test l i 5 l El@ l 0 l 9 l 8 @l ACll V I T Y CO T E *.T LOCATION OF RELE ASE nuE ASED Or sEtt A3E A* MOUNT OF ACTIVITY l NA l li lc] ]@

7 8 9 10 Z ]@l11NA 44 l

43 80 PERSONNE L EXPOSUHE$

NU'/B E R TYPE CE SCRIP T:ON j 1 7 0l 0l 0@l 7 @l 13NA 80 7 8 9 11 12 PERSONNE L l'.MIES NUVB E 54 DESCHiPTION I e 0l 0 0 11 12 NA 60 F 8 9 L.C% f)F CH C, A" A 7 TO F ACell TY ,

T4PE P t. w e"P i l u N l

l i j o l ]@ NA so 7 a 9

,u.[IUm , m @

m 7902060itF/ l N R C US F. O.4 L Y llll1lIl!!!Ile I ? l'l [JJb! '

NA 419-259-5000, Ext. 274 Richard Chs :ho P"o ;E - -

DVR 79-011 n, .1 or F ttE PAH ut -

1 I

b j

TOLEDO EDISON COMPANY <

DAVIS-BESSE NUCLEAR POWER STATION UNIT ONE 1

}

SUPPLEME! TEAL INFORMATION FOR LER NP-33-79-09 DATE OF EVENT: January 5, 1979 FACILITY: Davis-Besse Unit 1 1DENTIFICATION OF OCCURRENCE:

Alarm Point F-018 was in alarm with no detectors in alana state rendering it inoperable The unit was in Mode 1, with Power (MWT) = 2725, Conditions Prior to Occurrence:

and Load (Gross MWE) = 912.

While reviewing ST 5016.03, "Non-supervised Fire Alarm Description of Occurrence: the designated reviewer noted Circuit Checks", on January 5, 1979 at 1500 hours0.0174 days <br />0.417 hours <br />0.00248 weeks <br />5.7075e-4 months <br />, that a deficiency had been written on December Investigation 28, 1978 stating that Contact on January Dataat 5, 1979 Logger Point "F-018" was in continuous alarm.F-018 was the Containment the local Fire Alarm and th 1500 hours0.0174 days <br />0.417 hours <br />0.00248 weeks <br />5.7075e-4 months <br /> showed that Panel C4709, which feeds C4705 through C4706, was working and no alarms '

Containment This indicated that F-018 was receiving a false alarm signal and should were present. in the Action Statement of Technical have been declared inoperable, placing 28, the unitwhich 1978, requires a fire watch patrol.

Specification 3.3.3.8.a on Decemberidentified as a Technical Specification detector This was not done as it was not then.

A deficiency was written on December 28, 1978, but no work request was submitted until January 4,1979, when the designated reviewer noticed, during a cursory It was not until 1500 hours0.0174 days <br />0.417 hours <br />0.00248 weeks <br />5.7075e-4 months <br /> on review , that no work request had been written. was being fonnally reviewed that January 5,1979, when Surveillance Test ST 5016.03 it was recognized that a Technical Specification detector was involved.

Troubleshooting revealed two Indicating lights inoperable on Panel C4705 and that Resetting Panel C4705 at 1547 hours0.0179 days <br />0.43 hours <br />0.00256 weeks <br />5.886335e-4 months <br /> on January 5,1979 Panel C4705 was not reset.

cleared F-018 and removed the unit from the Action Statement. This was within the allowable time requirement of one hour so no fire watch patrol was established.

The f ailure of the indicating lights Designatiop of Apparent Cause of Occurrence _:

on Panel C4705 prevented plant personnel f rom knowing that Panel C4705 needed to be reset and had not been reset after alarm on Panel C4706 had cleared and been reset.

Failure to identify F-018 as a Technical Specification alarm allowed a delay in initiating corrective action.

LER #79-006

l

. TOLE'D0 EDISON COMPANY l' DAVIS-BESSE NUCLEAR POWER STATION SUPPLC4 ENTAL INFORMATION FOR LER NP-33-79-09 PAGE 2 Analysis of Occurrence: There was no danger to the health and safety of the public .

or to unit personnel. No fires occurred in containment during the time thgt Panel ,

C4705 was not reset. In addition, Panel C47C9 was operabic and could alarm locally in RACA (radiation access control area). ,

Corrective Action: Under Work Request IC-013-01-79, at 1547 hours0.0179 days <br />0.43 hours <br />0.00256 weeks <br />5.886335e-4 months <br /> on January 5, 1979, Panel C4705 was reset, clearing F-018 and removing the unit from the Action Statement of Technical Specification 3.3.3.8.a. A note was also affixed to Panel C4706 stating that Panel C4705 must also be reset af ter Panel C4706 is reset to clear alarms. In addition, ST 5016.03 has been modified to identify Technical Speci-fication alarms and add a lamp test.

I Failure Data: There have been no previously reported sLailar occurrences.

LER #79-006 t

.