ML20086K302
| ML20086K302 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 12/21/1974 |
| From: | Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Anthony Giambusso US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| RO-74-8, NUDOCS 8401260452 | |
| Download: ML20086K302 (2) | |
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December 21, 1974 Mr. A. Giambusso Deputy Director of Reactor Projects United States Atomic Energy Commission Directorate of. Licensing
-Washington, DC 20545
Dear Mr. Giambusso:
Subject:
Environmental Deviation The following deviation was reported to Mr. Walt Baunack, A.E.C. Region 1 Regulatory Operations Office on December 11, 1974.
In accordance with Section 7.4.2.A of the Environmental Technical Speci-fications, Appendix B of DPR-44/56 for units 2 and 3 Peach Bottem Atomic Power Station, the following report is acing submitted to the Directorate of Licensing as an Environmental Deviation.
Reference:
License Number DPR-44/56 Environmental Technical Specifications Appendix B Section 2.1 Report No.:
50-277/278-74-8 Report Date:
December 21, 1974 Deviation Date:
December 11, 1974
. Facility:
Peach Bottom Atomic Power Station Units 2 and 3 R.D. //1, De l ta, Pennsylvania 17334 Identification'of Deviation:
i Operation with only one cooling tower in service during cooling tower maintenance.
Conditions Prior to Deviation:
4 Unit 2 operat ing at approx imately 92% power. Unit 3 shutdown.
River flows in excess of 130,000 cfs. Permission to remove one cooling tower from service at a time was arranged with the Department of Environmental Resources, State of Pennsylvania on Decerr.ber 10, 1974.
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Descript ion of Deviation:
0 Yh EI7 On December 11, 1974 the 'A' and 'C' cooling towers were shut-
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l down sequentially in order to inspect and perform preventative maintenance i ~
8401260452 741221 1
PDR ADOCK 05000277 gy 8ENT REGION S
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Mr. A. G iambusso December 21, 1974 Page 2 on the ' A ' and ' C ' coo l i ng t owe r lift pump suction plenum supports.
The 'B' cooling tower was out of service during this period because of a previous failure of the cooling tower lift pump.
Designation of Apparent Cause of Deviation:
Requirement to perform preventative maintenance on cooling tower lift pumps in order to avoid a pump failure.
Analysis of the Deviation:
Because of the high river flows, and relatively low plant power, no adverse ef fects to plankton and fishes is anticipated. Temp-erature distributions did not vary significantly during the period.
Corrective Action:
During the outage of each cooling tower, the bolts which connect the inlet plenum to the pump casing were verified as being tight cnd teck welded in this position.
Loosening of these bolts is believed to have caused the f ailure of the 'B' cooling tower lift pump in early November. The corrective action taken should prevent similar failurcs of the
'A' and 'C' cooling tower lift pumps.
Failure Data:
Environmental Deviation Report No. 50-277/278-74-5 Very truly yours,
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M. /J. Cooney Ass't Gen'I. Superintendent Generation Division cc:
Mr. J. P. O'Reilly Director, Region 1 United States Atomic Energy Commission 631 Park Avenue King of Prussia, PA 19406 t
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