ML19326B465

RO 50-313/77-02:on 770120,leak Discovered on Reducer Weld Located in Spent Fuel Demineralizer Resin Transfer Line. Cause Not Determined.Section of Line & Reducer Cut & Replaced.Similar Cracks Reported in ROs 76-28 & 76-34

ML19326B465
Person / Time
Site:	Arkansas Nuclear
Issue date:	02/07/1977
From:	Mardis D ARKANSAS POWER & LIGHT CO.
To:
Shared Package
ML19326B460	List: ML19326B459 ML19326B465
References
NUDOCS 8004150810
Download: ML19326B465 (4)

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1. Reportable Occurrence P.eport No. 50-313/77-2 4

2. Report Date:

2/8/77 3. Occurrence Date: 1/20/77 4 Facility: Arkansas Nuclear One-Unit 1 Russellville, Arkansas

5. Identification of Occurrence:

Leak at a weld in the resin transfer line for the Spent-Fuel demineralizer.

6. Conditions Prior to Occurrence:

Steady-State Power y Reactor Power 2054 MWth Hot Standby Net Output 710 MWe Cold Shutdown Percent of Full Power 80  %

O Refueling Shutdown Routine Startup Load Changes During Routine Power Operation Operation Routine Shutdown Operation Other (specify) l

7. Description of Occurrence:

At 2130 hours0.0247 days <br />0.592 hours <br />0.00352 weeks <br />8.10465e-4 months <br /> on January 20, 1977, a leak was discovered at a weld on the 3 inch side of a 3"/2" reducer located in the resin transfer line fon the Spent Fuel demineralizer. The 3"/2" reducer is approxi-mately 6 inches from the demineralizer. .

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~Y NSP-III-2, Rev. 5 Attachment "D" 5 October 1, 1976 Page 2 of 4

4 Reportable Gecurrence Report No. 50-313/77-2 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

9. Analysis of Occurrence:

Seepage having been a small amount and contained in a controlled area, there was no hazard to the health and safety of the public.

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October 1, 1976 NSP-III-2, Rev. 5 Attachment "D" 5 Page 3 Of 4

( Reportable Occurrence Report No. 50-313/77-2 4

10. Corrective Action:

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A section of the 2" line and the 3"/2" reducer was cut out and replaced.  !

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11. Failure Data: -

, Cracks in the weld are similiar to the ones reported in ROR l Numbers 76-28 and 76-34.

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l October-1, 1976 NSP-III-2, Rev. 5 Attachment "D" 5 Page 4 of 4

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