ML19318A632
| ML19318A632 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 06/02/1980 |
| From: | Manry M GEORGIA POWER CO. |
| To: | |
| References | |
| NUDOCS 8006230522 | |
| Download: ML19318A632 (2) | |
Text
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a D~"quty DuiW A. g t,t6 Di M "
Admin.Offieer RONS Chief et nAnEY, CE0'1CI A 31513
+r 'I s M it. J %?!E S P.
O'RE1LLY Od RCES Chief
!!! T E D S T A T r. S N t.'C L E A ft RECULATORY COM'11SS10N yyMS Chief h't;3;RLCTOROF INSFECTION AND ENFORCEMENT Sfgde ChiSI
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' 'A T L A !! T A, CEORGIA 30303
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H wt ch t'n i t 1.
Docket No.
50-325.
flot i f i c a t i nn of Reportabic Occurrence No.
50-321/1930-0$$.
MOTIFIED: Mr. Paul Shemanski "A7E:
6-2-D'I DATE:
5-31-80 TIME: 1735 EDT TIE S C R I P T I ON OF REPORTABLE OCCURRENCE YnItIn1 rnn:*iticn U IIII~ IInit T7Fco l d shutanwn, a rando-visumi inepection or a c t.* a n i h t e feutside dryvell) mechanical snubbir*
nn safety
)
- rte-s use being performed as per site ecmcittment in l '. R ti o.
50-373'1480-021.
(Site committed to do a
random v i r. u a l inspection cf accessibic fontside drvwc111 mechanical snuhbe:s on esfety systema b,v P-1-80.)
Nature of Ocrurrence YITUaMiiIEc t i on being performed per surveillance required by MM d I-PG-2700 revealed t h.s t snubber 1.16 on Teo. # X17-177 ff" i n s t r ur-e n t line f r ot-Recirculatien "A"
loop) appeared to be'
" locked up".
Personnel then removed one end of snubber F r o ta itn point of attachment and attempted to manually stroke the unubber; it would not stroke.
The snubber was then removed Pervir-nnd tchen to shop and placed on snubber test
+= Land.
There a force of up to 1500 pounde was applied to the enubber in both the EXTENDED and RETRACT directions (750 pound snubber) and the snubber did not acve.
This verified that the gnubber was "Incked up".
Sibsequent visun1 inspections and manual attempts to stroke othe: icechanical anubbers revealed that t h e.
following anubbers were also " locked up":
T
- h
- 1)
- snubber # 5 on Iso. f 121-F23: 3/4" drain from 1B*l-F022c.
t
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Snubber F 6 on Iso. 8 B21-F24: 3/4" drain from
.i' 1521-F022D.
h' 3)
Snubber 8 7 on Iso. 9 821-r25: 3/4" drain from 1831-F0233.
a)
Snubbern # 34 and 35 on 1so.
- X32-IF6:
1" instrument line f rose Reactor Reelreulation Pump A discharme.
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Snubber # 37 on Ino, d X33-1F5:
I" instrurent line f r orn Reacter Recirculation Pump B flow.
c 61 Snubher # 3R on Iso. A X34-1116: 3/4" line to Scal Water for Reac t or Rec i rcul a t i on Pump A.
?'C TE :
All failed mechanical snubbers were manufactured by International Nuclear Safeguards.
i Iu..ediate corrective Action 1
R i,.. e Unit I
vis s in c o T rT Shutdown, no intnediate corrective l
j fe action was neither required nor taken.
.Y Caune..
THIL:
investtaatton (cutting snubber apart) revealed that the cause of the snubbers being " locked up" was corrosion in tha enubbers.
Eupp!cecntal Corrective Action WrVeTT13nt e of tha rcrainiU, rneehanical snuhbers on Unit I safety s y n t e rn a vs.I be completed and all that fail the surveillance will be replaced prior to startup.
I Statun of Redundant or Backup Svntems I;
There are no -redundant or backup s v s i: e m s.
.t fronet to Other l'n i t Under i n W~TTg a t i o vi s.
I.
lf J u..s.t i f i e n t i o n for Continued Operation
.To n e - Unit I will not start up until all mechanical snubbers I
on safety systems have been inspected and all failed snuhbers have been replaced.
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