ML19319E583

RO 50-313/77-12:on 770505,leak Discovered at pipe-to-pipe Weld in High Discharge Piping to Spent Fuel Pool.Cause Unknown.Leak Isolated from Sys.Repairs to Be Made as Soon as Possible

ML19319E583
Person / Time
Site:	Arkansas Nuclear
Issue date:	06/03/1977
From:	Mardis D ARKANSAS POWER & LIGHT CO.
To:
Shared Package
ML19319E578	List: ML19319E577 ML19319E583
References
NUDOCS 8004110834
Download: ML19319E583 (4)

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Reportable' Occurrence Report No. ' 50-313/77-12 '

2. Report Date: June 3,1977 3. Occurrence Date: May 5, 1977 4 Facility: Arkansas Nuclear One-Unit 1 -

Russellville, Arkansas 72801

5. Identification of Occurrence:

, i A leak was discovered in the ' Spent Fuel Cooling System.

6. Conditions Prior to Occurrence:

1 Steady-State Power X Reactor Power 2311 MWth

l Hot Standby Not Output 725 ffWe Cold Shutdown . Percent of Full

• Power 9 0 __)

Pafueling Shutdown Lead Changes During Routine i

Power Operation Routine Startup N/ Operation

, Routine Shutdown Operation Other (specify)

7. Description of Occurrence: .

At 0925 hours0.0107 days <br />0.257 hours <br />0.00153 weeks <br />3.519625e-4 months <br /> on May 5,1977, a leak was discovered in the Spent Fuel Cooling System.

The leak was at a pipe-to-pipe weld downstream of Valve sp-29 in a vertical run of piping for the high discharge to the Spent Fuel Pool. The leak was isolated from the system. .

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i Reportable Occurrence Report No. 50-313/77-12

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8. Designation of Apparent Cause of Occurrence:

B

Design Procedure i Manufacture Unusual Service Condition Including Environmental '

Installation /

Construction Component Failure.

4 (See Failure Data) ..

Operator Other (specify) X

] The cause of .the leak is unknown at this time.

a

9. Analysis of Occurrence:

Since the leak was isolated and the leakage was contained in a controlled area, there was no hazard to the health and safety of 3 the public.

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r Reportabic Occurrence Report No. 50-313/77-12

10. Corrective Action:

The weld will be repaired or, if the crack is in the heat affected t; zone of the pipe, a rection of the pipe will be replaced, i 1

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11. Failure Do_ta:

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Heat number of each section of pipe is: 9T2354 - 80C005 Weld number: HCC-12-24 l

Other piping cracks in the Spent Feel Cooling System have been reported.

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