ML19309D802
| ML19309D802 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 07/16/1975 |
| From: | David Williams ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19309D789 | List: |
| References | |
| NUDOCS 8004110678 | |
| Download: ML19309D802 (4) | |
Text
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. LICENSEE EVENT REPOclT U
CONTROL BLOCK:l l
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I (PLEASE PRINT ALL REQUIRED INFORMATION) 1 8
NAME LCENSE NUMBFR Y E TYPE 1 A I R l A l R.l K l l l lo lo l-lo lol clo Iol-lol oj l4lIl/l1l/l lC l / l 1
7 89 14 15 25 26 30 31 32 CATEGORY Tp SO COCKET NUMBER EVENT CATE REPORT OATE 01 COtrT I P l ol LIJ M 1015101-1o 131i 1.s_1 lo l11o l7171sl 1o171/16171sl 7 8 57 58 59 60 61 68 69 74 75 80 EVENT OESCRIPTION HE IDurie normal noua4/on at IMo heues.
9%c maks,,a co ns, to as I 7 89 80 SE I sh ar+e.d and i m m e Maie.tv +ci o p e.d. Pu m a was Eco xe rt.
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a 7 89 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION
@ l Fu m o had been allonel he n s4andby and was con for apeoxi-l 7 89 80 DE lmaMv
/c minu4es a4 1037 hours0.012 days <br />0.288 hours <br />0.00171 weeks <br />3.945785e-4 months <br /> o;ML 4hd alhnment
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% POWER OTHER STATUS DISCOVERY O1SCOVERY OESCRIPTON l.nJ lol4131 I NA I
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10 12 13 44 45 46 80 RELE SEO OF EL ASE AMOUNT OF AC:WITY LOCATON OF RELEASE BE lzj LZJ l
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10 11 44 45 80 PERSONNEL EXPOSURES 3
NUMBER TYPE DESCRIPTON H lololol LIJ l
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i 7 89 11 12 13 80 PERSONNEL INJURIES NUMBE R DESCROTON 3E lololol l
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7 89 11 12 80 OFFSITE CONSEQUENCES Ml NA l
7 89 80 LOSS OR DAMAGE TO FACILITY TYPE DESCRWTON DE LZJ l
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7 89 10 80 PUBLICITY l
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1 7 89 80 ACOITIONAL FACTORS I
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,j 9 80 8I Rond110b77 1
7 89 80
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NAME: h a n$ CLl N_ l 1)I dia Rs b 0l U l-N I9 2.
PHONE:
GPO 889 647
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- 1. - Abnormal Occurrence Report No.
50-313/75-4 i
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Report Date:
July 16, 1975 3.
Occurrence Date: July 7, 1975 i
4 Facility:
Arkansas Nuclear One-Unit 1 Russellville, Arkansas 5.
Identification of Occurrence:
i
-(P36C) "C" Makeup Pump Failure i
A, 6.
Conditions Prior to Occurrence:
Steady-State Power X
Reactor Power 2421 MWth Ibt Standby Net Output 772 MWe i
Cold Shutdown Percent of Full Power 93 Refueling Shutdown Load Changes During Routine Power Operation
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Routine Startup J
Operation Routine Shutdown Operation Other (specify) i i
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Description of Occurrence:
On July 7, 1975, at 1340 hours0.0155 days <br />0.372 hours <br />0.00222 weeks <br />5.0987e-4 months <br />, P36C makeup pump was started to increase level in "A" core flood tank to-clear level alarm. Pump immediately tripped.
Investigation revealed that pump was frozen. The pump had been aligned for ES standby and was rur, for approximately 6 minutes at 1037 hours0.012 days <br />0.288 hours <br />0.00171 weeks <br />3.945785e-4 months <br /> that date with no problems noted, but it was found during the investigation that the pump did not have a suction during the six (6) minute run. At 1430 hours0.0166 days <br />0.397 hours <br />0.00236 weeks <br />5.44115e-4 months <br /> July 7, 1975, P36A makeup pump was aligned for ES standby with P36B pump in normal. makeup.
O Shrch 4, 1975 NSP-10, Rev. 2 Page 2' of 4
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l Abnormal Occurrence Iteport No.
50-313/75-4 ff li 8.
Designation of Apparent Cause of Occurrence:
Design Procedure 4
Manufacture Unusual Service Condition Including Environmental Installation /
Construction Component Failuro Operator X-Other (specify) i t
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Analysis of Occurrence:
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No-safety implications were involved and there was no effect on public health and safety. P36A and P36B were operable.
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. Abnormal Occurrence Report No.
50-313/75-4 4
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- 10. ' Corrective Action:
l P36C pump was disassembled and inspected. Number 1 impeller and wear ring were frozen; repairs will be made to the pump.
e This occurrence was discussed with all operators and the need for proper communications was stressed.
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11.- Failure Data:
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J There have been no previous failures of this type. The failed component d
identification is as follows:
Byron Jackson,' Hori:ontal double bearing pump, Type DVMX, Serial Number 691N0065.
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yk March 4, 1975 NSP-10, Rev. 2 Page 4 of 4 4
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