ML19319B790

RO NP-33-77-66:on 770824,decay Heat Pump 1-2 Taken Out of Svc While Installing Union on Cooling Water Line.Planned Maint Activity Allowed Seismic Support Tightening.Maint Completed & Heat Pump Returned to Svc

ML19319B790
Person / Time
Site:	Davis Besse
Issue date:	09/19/1977
From:	Lingenfelter J, Vallade S TOLEDO EDISON CO.
To:
Shared Package
ML19319B717	List: ML19319B716 ML19319B790
References
NUDOCS 8001270258
Download: ML19319B790 (2)

Text

..

LICENSEE EVENT REPORT Cowinoi etoCC LLi 1 I IJc i

!.'.':A" L .C c ~,. ~., ooc . ' 'N .T ' 5,*J T oi 10lHIDIBISilj l0 j Oj - J 0[ 0 ! Nl P 'F J -10 l.s31 l 4[ljl l l]lj

, . . . ,s zS e 10gla Ca .o... n n :.iz.= : oo ~u .. . , , . . , , . . . .< e.,om,.

CONT 0t5 t 0 l --i 0 13 l4 1 6

[

j g i 7 t 4 [717Q [01 9 1 1 1 9;77 1 t vtNT Of SCnervioN 7

@!89 Decay Heat Pump 1-2 was taken out of servtge to in=tah m<en on the j

- go

@l89 7

Compenent Cooli_ng, n water Return line. This niaced the im i e in Ar-4n,  !

a 8l89 7

Statement (a) of Technical Seecificaticn 3.5.2,_,,(NP-33-77-60 f w

EL89 7 1 EL A i

(Tot onY c n=enews **

• c o or suae t. u 7[# n"c"tYn't I . v oos a e ro**

8 twici 7 89 80 LJJ ti IPintMIPlYlvI 12 IJ

- L2J eJ I z lo l o f o l es er LHJ og CAust DE SC asp YtoN ota l Decay Heat Pu=p._1_-2_yas inocerable to install a unfen. I aa 7 89 $

7.~..

eO

/

\ )

8L89 1 __ .JA g s EN's* s cow.e . ot..e. Status us0 .* Discowt av neaCnerv eoae 8

7 0 L3J 9

L9JO10i to 12 LJA IJ **

l (2j ( n j 46 e e j e. ma no et _So c on. e g me e

.ac* t* c* ast vs t D v os ng a g ast muouas t or acteve1w 8

7 8 9 LZ_.J . LZJ to l NA eI a4 1 l 45 NA L OC A t tO** c' .c L C a%C I

M Pt n50NNEL t aiPC$URE$

swuwet . ~ ev.f OF SC .o rT 80*s

)

!0 !0 to 1 W L NA 09 Pt n5CNNE L INJUHits It IJ IJ J

muuets ot sc.iev eone

, .\I !01 ,, I,, NA a

1 of F Ssif CON 5E oUf asCES

%( NA M I

LoS5 oR Q AMay( 10 F ACILliv s v PC OL S C . se v ione Q .

PU8LiCf 7v i

l NA

> e, 1 RJ ACOstsONAL eaCTORS 31 a ae NA i

a2

(~3) i

es 1

j

,s ya

, , , , Jacque Lingenfelter/ Sue Vallade ,

(4197 259-5000, Ext. 251 80 01270 f N

~,

O TOLEDO EDISON COMPANY

\. DAVIS-BESSE UNIT ONE NUCLEAR POWER STATION SUPPLEMENTAL INFORMATION FOR LER NP-33-77-66 DATE OF EVENT: August 24, 1977 FACILITY: Davis-Besse Unit 1 I

IDENTIFICATION OF OCCURRENCE: Decay Heat Pump 1-2 was made inoperable to install union in cooling water line.

Conditions Prior to Occurrence: The plant was in Mode 2, with Power (MWT) = 0 and Load OL'E) = 0.

Description of Occurrence: On August 24, 1977 at 0915 hours0.0106 days <br />0.254 hours <br />0.00151 weeks <br />3.481575e-4 months <br />, Decay Heat Pu=p 1-2 was taken out of service to install a union on the Component Cooling Water Return line. This placed the Station in Action State =ent (a) of Technical Specification 3.5.2 since one of the two Decay Heat Pu-ps required in Mode 2, startup, was removed from service.

Designation of Apparent Cause of Occurrence: This was a planned =aintenance activity. There was a loose piping connection on the inboard side of the Component Cooling Water Return line for Decay Heat Pump 1-2. a union was installed in the line to allow tightening without re= oval of previously installed seismic supports.

Analysis of Occurrence: There was no danger to the health and safety of the public or Station personnel. Decsy Heat Pump 1-1 was still available to operate in the event of an accident.

Corrective Action: The union was installed, completing the scheduled =aintenance.

Decay Heat Pump 1-2 was returned to service at 1515 hours0.0175 days <br />0.421 hours <br />0.0025 weeks <br />5.764575e-4 months <br /> on August 24, 1977, removing the Station from Action Statement (a) of Technical Specification 3.5.2.

Failure Data: There have been no previous occurrences involving Decay Heat Pump 1-2 for planned maintenance.

l

. _ _ .