ML19326C017
| ML19326C017 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 04/22/1976 |
| From: | David Williams ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19326C007 | List: |
| References | |
| NUDOCS 8004180704 | |
| Download: ML19326C017 (4) | |
Text
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1.
Reportable occurrence Report M. 50-313/76-4 2.
Report 1)a te : 4-22-76 3.
occiirrence tial e:
3-23-76 4
.[acility:. Arkansas Nuclear One-llnit 1 Russellville, Arkansas 5.
Identification of Occurrenec:
i Channci A of Reactor Protection System, Reactor building pressure failure j
to trip.
6.
Conditions Prior to Occurrence:
Steady-Stato Power Reactor Powe r.
_ 0 W.h llot Standby Not Output 0
We Cold Shutdown X
Percent of Full Power o
li Refueling Shutdown Load Changes During Routine Power Operat ion Routine Startup
-e Opera t fon d
Routine S8utdown t
Operation Other (specify)
E i:
7.
Description of Occurrence,:
~ "'
During a routine calibration of pressure switch PS-2400, Reactor Building pressure switch to Channel A of the RPS failed to trip on increasing pressure above 18.5 pain.
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8.
Designat_lon of Agiarent Cause of Occierrence:
4 Ocsis;n 1
Procedu re I
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thinufacture l
ihnisual ' Service Comli t ion includini; linvi ronunental
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Installation /
j-Cons truction Component Faiturc 1-Operator i
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Other (specify)
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Instrument drift I
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9.
glysis of Occurrence:
A' minimum of 2 channels were operable at the correct setpoint at all times as required by Technical Specifications. Therefore there was no hazard to the health and safety of the public.
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Corrective Action:
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Pressure switch PS-2400 was recalibrated and tested to verify it trips at j
t-a pressure < 18.5 psia, i
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Failure Data:
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No prior failures of this type.
I Barton Model 288A-12046 I
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' March 23, 1976-NSP-10 Itev..4 Page 4 ot' 4 4
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UCENSEE EVENT REPORT m
CONTROL BLOCK.,
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[PLEASE PRINT ALL REQUIRED INFORMATION) 1 6
AME UCENSE NUMBER PE TYPE l Al RI AIRI Kl1 l lolol-lololclolol-lolol i4l1Iililil 1013I i
7 89 14 15 25 26 30 31 32
"'7P[ SON CATEcoAY T
DOCKET NUMBER EVENT.JATE REPORT OATE 01CONTI I
I LL_]
Lt.J 1015101-10l311131 10131213lTl61 lol 4121217 l co l 7 8 57 58 59 60 61 68 69 74 75 80 EVENT DESCRIPTION E5 i Durina rouwe calibration. pressure swite.L PS-2'ico ( Reacbr BuilJin, 7 89 p r es suve 1
80
@ Iswilck 4. Channel A.0 h RPs) failea + tvi,.. i cv.isin.,,,essu,, above 18.s P3;a.J 7 89 80 Eg i Chanels B,C,awa D were operable. No prior faitu<es o9 Ris hpe. SwitcL 7 89
_J o7 39 l was recal;kvated. ( 50-313/ T fo - 4 )
J 7 89 C1 gg i i
7 89 pnug 80 CONE Coo COMPONENT CODE R
M A
VOLATON 35 IIIAI LE]
l C.l KIT I B I R l KI LA.J 1B1o18101 INI 7 89 10 11 12 17 4J 44 47 48 CAUSE DESCRIPTION gg IIwsfrum. t bif t. Badow Model 288 A-1209 6 l
7 89 80 DE I I
7 89 80 cN I I
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'00 TJE!vEa!
, PowEn oisEn STATUS osCovEav oESCaPTON LGJ 1010101 I NA I
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1 7 8 9
10 12 13 44 45 46 80 AELF SED OF AEL ASE AMOUNT OF ACTMTV LOCATION OF AELEASE 3E LIJ LTJ l
NA i
l NA l
7 8 9
10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCAiPTON BE 1010101 LZJ l
NA l
7 89 11 12 13 80 PERSONNEL INJURIES NUMBER DESCAsPTON 3E lololol 1
NA l
n 7 89 11 12 80 OFFSITE. CONSEQUENCES DE I NA I
80 LOSS OR DAMAGE TO FAripTY TYPE DESCRIPTON m2 LZJ l
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7 89 10 80 PUBLICITY nE I NA l
7 89 g
AOOITIONAL FACTORS
[mll NA I
L.J 9 80 NAuE. hniel H. Williams psone.(so:1371-9 i92 80 1
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