ML19326C104
| ML19326C104 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 07/16/1976 |
| From: | Mardis D ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19326C101 | List: |
| References | |
| NUDOCS 8004180765 | |
| Download: ML19326C104 (4) | |
Text
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LCENSEE LCENSE EVENT
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.l.,Ignortgahic oce:nrrence I:eportj f;o. 50-313/76-13
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Itgo r t D.i t e : July 16,1976 Oren Tente llate: June 24, 1976
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,l]IC.i l.8_ty,:
Arkansas Nucicar' One-Unit 1 i
Russellville, Arkansas i I' !
5.
.I.de.n t.i fica t lon o f Occurrence:
- i Leak in emergency feodwater line to "A" steam generator.
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6 Conditions Prior lo Ocen rence:
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St e ady-Sta te Powe r,,,, _
lteac to r Powe r.._ _ 0..._-
NI" I' 4
1 Ilot Standby Net Output 0
_We Cold Shutdown X
Percent of linil Power-o
- 4 4
4 i
Itefueling Shutdown load Changes During Routine Power Operar ion Rotif ine St art tip
' Ope ra t ion i ~
l llout ine Shuttlown Operatinn
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4 I bther (specify) ~
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.De_s_c_r_ ipt ion of Occurrence:
At approxinately 1100 hours0.0127 days <br />0.306 hours <br />0.00182 weeks <br />4.1855e-4 months <br /> on June 24, '1976, a leak was discovered in
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j the emergency feedwater line to "A" steam generator between the E.F.ll.
-r pumps and valves CV-2670 and CV-2627.
The Icak was located in a verti-cal run of pipe uhcro the pipe ponctrated a 32 inch concretc floor. The defcet in the pipe appears to have originated from the 0.D. of the pipe.
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!! arch '23, 1976 NSP-l H, ~ llev. 4 Page 2 of 4 I-mm g
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l 1:eportable Occurrence !!cport do-50-313/76-13 f
10 Correcti ve Act ion:
The defective section of pipe was replaced.
The floor penetration was i
enlarged to prevent. contact of the pipe with the concrete and rebar in i
the floor in case. electrolysis or corrosion caused the failure.
9 11.
I:a i l o re 11:s t;n :
Tj Mo prior failures of this type. The pipe will be given a metallurgical OX3rti 113 t 1011.
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/st ta clititen t "C"
M.irch 23, 197(,
NSP-10, llev. 4 Page 4 of.1 l
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"Iteportalile occurrence I:cport No. 50-313/76-13 i
8.
Designa t ion o f Appa rent Cause_ of,,[h*c.piyence:
. i Design l'rocedure 4
thnufacture Unusual Service Condition l
Including linvironmental l
Installation /
j-Const rinction Component Failurc
= = =
4 4
l Operator i
i
. Ottier (specify)
X The caus' ot the defect is not known at this time but from a visual l
e inpsection it appears. to have been caused by electrolysis or corrosion.
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9.
Analysis of Occurrence:
Even if the plant-had been at power,' the pumps and valves associated with the redundant loop were operable, thus there was no hazard to the health and mfety of the public.
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t-Attachment "C" 4
ibrch 23, 1976.
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