ML19308D470

RO-77-89:on 770715,valve DHV-41 Failed to Open from Control Room During Cycling Surveillance Procedure.Caused by Shift in Torque Switch Setting.Torque Switch Contacts Burnished & Switch Reset

ML19308D470
Person / Time
Site:	Crystal River
Issue date:	08/09/1977
From:	Stewart W FLORIDA POWER CORP.
To:
Shared Package
ML19308D464	List: ML19308D463 ML19308D470
References
NUDOCS 8002280780
Download: ML19308D470 (2)

Text

_.

g5)g7Eg_$ VENT REPORT

~

~

~-

lh O-

. CONTnot otOCx:l l

l l

l l

l c,tcas PniraT not nEOuinc0 irarc :.iAr:c.;;

o AME LCENSE NUMOEA WP YC lFlLlCl Rl Pl 3l l 0 l 0-l-l 0 l 0 l 0 l 0 l 0 l-l 0 l 0 l l 4l 1l1l 1l1l l0l3l 9

14 15 25 2G 30 31 32 CATECORY 77P 5o n DOCKET NUMOEA EVENT OATE AEPOAT catt O 1 CON'T l - l - l d W

l0l5l0l-l0l3l0l2l l 017 l 1 l 5 l7 l 7l l0 l8 l0 19 l 7 l 7 l 7 0 57 00 59 60 61 68 69 74 75 00 EVENT DESCRIPTION Ql During the iserformance of 'the quarterly valve cycling surveillanca procedure SP-370.

I 7 oD 80 03 l valve DHV-41 would n#ot open from the control room contrary to Tech Spec 3.6. 3.1.

l 7 89 00 Ql Redundancy NA as valve DHV-4 remained closed. Second occurrence, refer LER 77-9, l

7 89 80 gl dated 9 February 1977. Maintenance restored operability of DHV-41.

(LER ' 77-89) l 7 U9 80

$I I

7 89 pme SO No't CIDE COMPONENT COCE mat FACnAA VOLATCN 8 Ic IP I LrJ Iv li It lv iw Ix I Ld IAi7 ln in I Luj 7 89 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION 0

l Valve DHV-41 would not open due to a shift in the torque switch settSc.

Oo The torcue l'

7 89 00 l switch vas reset to ensure opening of the valve.

~

l 09 7 09 60 1

I s US

% POWER OTHER STATUS OtSCoVEAY DISCOVERY OCSCRIPTON lEl 1019l0l l NA l

lBl l

NA l

70 9

10 12 13 44 45 46 80 FORM oF ACTNITY CONTENT DELEASEo CFRELEASE[

AMOUNT OF ACTN'"v.

LoCATON OF RELEASE 12

\\Zl W

NA l

l NA 7 8 9

10 11 44 45 00 PERSONNEL EXPOSURES NUMBER TYPE DESCA PTCN 13 l0 l0 l 0 l l Zl l

NA l

)

7 89 11 12 13 60-PERSONNEL INJunlES NUMOER DESCRIPTON l0 l0 l 0 l l

NA l*

14 7 89 11 12 80 OFFSITE CONSEQUENCES 15 l NA I

7 09 CO LOSS OR OAMAGE TO FACIUTY TYPE CESCAIPTCN bdl NA l

)

7 8D 10 60 PUBUCITY 8I NA l

7 BD 00 ADDITIONAL FACTORS l'

See attached Sucoletentarv Information

,j ou

[l 8 0 02 2807 f@

l 7 "

g l

NAME:

' tJ.

P. Stemrt PHONE: 0 13) 866-4159 CPO A ff I. e. r. 7

~,

SUPPLEMENTARY INFORMATION

1. Ifeport No.:

50-302/77-89

2. Facility:

Crystal River Unit #3

3. Report Date:

9 August 1977

4. Occurrence Date:

15 July 1977

5. Identification of Occurrence:

i Containment isolation valve DEV-41 would not open from the control room contrary to Technical Specification 3.6.3.1.

6. Conditions Prior to Occurrence:

Mod; 1 power operation.

7. Description of Occurrence:

I At 1400, while performing the quarterly cycling of valves surveillance procedure SP-370, 4

Decay Heat Valve DEV-41 would not_ open from the control room. Maintenance was initiated l

and DEV-41 restored operable.

8. Designation of Apparent Cause:

The cause of this event was due to a shift of the torque switch setting.

9. Analysis of Occurrence:

In the ovent of an Engineering Safeguard actuation, there were minimal safety implica-l tions as a result of this occurrence. The alternate long term cooldown path via the pressurtzer spray system was operable and available, and valve DRV-41 could have been operated at its local station, since it is located outside Containment.

10. Corrective Action:

i The torque switch contacts were burnished and the switch reset to ensure opening of the valve.

11. Failure Data:

This was the second occurrence of this event. Refer to LER 77-9, dated 9 February 1977.

9 l

m y

4 m

c-w

,- - - -