ML19319E541
| ML19319E541 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 12/30/1976 |
| From: | Mardis D ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19319E539 | List: |
| References | |
| NUDOCS 8004110804 | |
| Download: ML19319E541 (4) | |
Text
.- --__
~
UCENSEE EVENT REPOP-CONTROL BLOCK:l l
l l
I I
I (PLEAsE PRINT ALL REGUIRED INPORedATEDet)
I 1
6 TAME LCENSE NUMBER 1AIRl4lKl(Ill 10101-101010101o1-10101 141/ Ill/l/l 10131 7 89 14 15 25 26 30 31 32 CATEGORY Typt 50 COCKET NUMBER EVENT OATE REPOAT CATE 01CONil I
I LL-J LLJ 1015101-10131'13I II I.2. l o t /1716 I I i 121 s 1o 1714 I 7 "1B 57 58 59 60 E1 68 69 74 75
+
80 EVENT DESCRIPTION 08 @dMoun 'rsvene-s17 tis" anwet f99 'fe 5Ph LEAWA6E' is/41 'museerEMED eM A uGLs
'n o A*zTt f4 M i
7 89 80 DE Ior VaEva v-io. A,1s -reveruAx,- w asYe Atn no A 1rs -I.
rexe rwa raus c asear.
7 89 80 DE IPMNFTRAer TEYT* of Tyr VALV6 Addf SF-10 YAlvf 37-fl RGvCALD A CR M rH TNT MrAri 7 89 80 h.lAFFECT1r*5 2dMf.
n neman3Aur _vv m Att" AVAIL ABL G".
YAlyf ST = ll u r s t_
n G" l
7 89 80'-
BG farrueen.
(s'o - sis /74 - 34) l 7 89
/
=
80 CIDE CE COMPONENT CODE SUPPLE uauur n
votafoN E IFl.Cl L5J IVIAItIviElxl LAJ l4131915I ty.]
7 89 10 11 12 17 43 44 47 48 CAUSE OESCRIPTION DE I N4 1
7 89 80 BE I hve sr-ll uret ne asruics o.
I N19 80 ji I-
's d
% POWEA OTHEA STATUS O COvEAY OrSCOVERY OESCASTCN LC lol91' l I ~
u I
LkJ l
ua I
i 7 8 9
10 12 13 44 45 48 80 ACTMTV CONTENT FTil.
RELEASEO lyj i
un i
I us
... I OF RELEASE AMOUNT OF ACTMTV LOCATCN OF RELEASE lyj 7 8 9
10 11 44 45 80 PERSONNEL EXPOSURES 3
NUMBER TYPE CEScapTON GE 1010101 1r]
l v4 I
7 89 11 12 13 80 PERSONNEL INJUAIES NUMBER OESCAFTCN DE 1010101 l
.NA l
7 89 11 12 80 OFFSITE CONSEQUENCES BB I WA I
7 89 4
80 LOSS OR OAMAGE TO FACIUTY TYPE DESCApTON
$Y 7 89 10 80 PUBLICITY I
&I WA I
7 89 P
80 8004110 h-o p} lACOITIONAL FACTOAS bl N#
I 7 89 80 81 i
NAuE M ar<n 6 krnn-
~ONd..s4, 6 v - nu
. ' ~fi~ nT O
3 s,
m>
- 1.
Reportabic Occurrence Report No. 50-313/76-34 4
L 2.
Report Date: 12/30/76 3.
Occurrence Date:
12/1/76 4
Facility:
Arkansas Nuclear One-Unit 1 Russellville, Arkansas i
S.
Identification of Occurrence:
Water leakage from valve in spent fuel cooling system.
6.
Conditions Prior to Occurrence:
Steady-State Power X
Re~ actor Power 2542 MWth Hot Standby Net Output 829 Mwe Cold Shutdown Percent of Full Power 99 (A)
Refueling Shutdown Load Changes During Routine U
Power Operation Routine Startup Operation Routine Shutdown Qeration Other (specify) s 7.
Description of Occurrence:
At 1715 hours0.0198 days <br />0.476 hours <br />0.00284 weeks <br />6.525575e-4 months <br /> on December 1,1976, leakage was discovered on a weld downstream of Valve SF-10 between the valve and a T-section.
Cause of the leakage appeared to be a small crack in the weld.
A dye-penetrant j
test of the T-section area revealed no penetrating cracks.
It was then l
thought that the Icakage may have come from above on Valve SF-11.
A dye-penetrant test revealed a crack in the heat affected zone of Valve SF-11.
O NSI4III-2, Rev. S Attachment "D" 5
October 1, 1976 Page 2 of 4
e-
~.
m Reportable Occurrence Report No.
50-313/76-34 4
8.
Designation of Apparent Cause of Occurrence:
Design Procedure Manufacture Unusual Service Condition Including Environmental Installation /
Construction Component Failure (See Failure Data) 5 Operator Other (specify)
X Unknown I
9.
Analysis of Occurrence:
Since the leakage was only a minute amo'unt and was contained in a controlled area, there was no hazard to the health.and safety of the public.
5 i
I October 1, 1976 NSP-III-2, Rev. 5 Attachment "D" 5
Page 3 Of 4
.-~.-,,-
4
,. ~.
-n m
3 u
o S' _ _, P ~"
4 1
Reportable Occurrence Report No.
50-313/76-34 4
s
- 10. Corrective Action:
C' 4
After a dye-penetrant test was perfomed on the T-section area of f
f, ' '
Valve SF-10 and no penetrating cracks were found, a dye-penetrant' teg
.i-revealed a' crack in the body of Valve SF-11.
Valve SF-11 will:be replaced.
.e
+..>
i
.'?
n p-j i
t t
11.
Failure Data:
~~
NOIE I
s s
t l
i t
l l
October 1, 1976 NSP-III-2, Rev. 5 Attachinent "D" 5
i Page 4 of 4 e
---,y--
_.----.-,y.,,.w-w.
w, y
7-_,--_,y
,._,ys,
-