ML19320A169
| ML19320A169 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 08/03/1976 |
| From: | Mardis D ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19320A166 | List: |
| References | |
| NUDOCS 8004210475 | |
| Download: ML19320A169 (4) | |
Text
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Reportahic Occurrence Report ik.
50-313/76-16 h irrence Inste: 7/12/76 2.
Report Dato: 8/3/76 4
Facility:
Arkansas Nuclear One-Unit 1 Russellville, Arkansas 5.
Identification of Occurrence:
T-9 was below the 37,500 lb. Na2 2 3 limit per Tech. Spec. 3.3.4B.
S0 6.
Conditions Prior to Occurrence:
I Steady-State Power X
Reactor Power 2S17 MWth Ilot Standby Net Output 809 MWe I
Cold Shutdown Percent of Full Power 98
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Refueling Shutdown Load Changes During Routine Power Operation i
Routine Startup i_
Operation Routine Shutdown Operation Other (specify) s t
7.
Description of Occurrenec:
At 0905 hours0.0105 days <br />0.251 hours <br />0.0015 weeks <br />3.443525e-4 months <br /> on July 12, 1976, a. sample was taken from the Sodium Thiosulfate Tank (T-9).
A'n analysis found T-9 to be below the 37,500 lb.
sodium thiosulfate limit.
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O Attachuent "C" i
!'. arch 23, 1976 NSP-In. Rev. 4 Page 2 of 4
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Reportable' Occurrence Peport No. 50-313/76-16
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Desip, nation' of Apparent Cause _of Occurrenec:
j Design Procedurc Flanufacture Unusual Service Condition lucluding Environmental Installation /
Construction Component Failurc Operator 1
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Other (specify)
X Suspecting a leak from T-9 into the Reactor Building Spray System.
t 9.
Analysis of Occurrence:
Since more so.um thiosulfate was added and 37,500 lbs. is a conservative estimate, tb.e was n.) effect on the health and safety of the public.
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Attachiwnt "C" l
hhrch 23, 1976 NSP-10, Rev. 4 Page 3 of 1 l
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.I Reportable Occurrence Report iio.
50-313/76-16 4
4 10.
Corrective Action:
On July 13, 1976. 056 lbs of sodium thiosulfate was added to T-9.
I Efforts are being made, including lapping of the isolation valves, to reduce this leakage.
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11.
Failure Data:
None.
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/st taciunent "C" Sbrch 23,1976 NSP-10, Rev. ' 4
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