ML20090E194
| ML20090E194 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 04/01/1974 |
| From: | Schneider R NIAGARA MOHAWK POWER CORP. |
| To: | Skovholt D US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML20090E199 | List: |
| References | |
| 10-50-220-74-2, 3092, A-50-220-74-2, A0-50-220-74-2, NUDOCS 8303140108 | |
| Download: ML20090E194 (1) | |
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-6 NIAGARA MOHAWK POWER CORPORATION NIAGARA MOHAWK 300 erd DOULEVARD WES1 g [: 'k l 2 f f '.y, ST8EACUSE N Y 83202 f
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N Mr. Donald J. Skovholc
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Assistant Director for Reactor Operations Division of Reactor Licensing United States Atomic Energy Commission Washingt on, D. C.
20545 Re: Provisional Operating License: DPR-17 Docket No.: 50-220
Dear Mr. Skovholt:
Persuant to Nine Mile Point Nuclear Station Unit #1 Technical Specifications 1.13 d, we are reporting Abnormal Occurrence 50-220-74-2 a pipe crack in the waste concentrator piping.
On March 23, 1974 during routine operation of the concentrator steam was observed coming through the insulation surrounding a 12" section of pipe leading from the side arm heater to the bott m of the concentrator.
The concentrator was shut down and the insulation removed revealing cracks in the pipe.
The primary cause of the failure can be attributed to improper installation techniques during construction. Due to a problem with pipe fit certain forcing means were employed to position the pipc. These means weakened the pipe and caused its cracking. The pipe section will be replaced using approved methods. A sect.?on of the failed pipe will be examined to determine ifiany underlying cause for cracking was present.
The expanded Administrative Procedures and the expanded Quality '
Control Grcup will prevent reoccurences of this failure in the future.
The. cracking in the piping did not present a-hazard to the Station Personnel or the General Public.
Very trulv yours,
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- k. k. Schneider
. Vice' President.- Electric Operations
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