ML20086F314
| ML20086F314 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 07/15/1977 |
| From: | Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Stello V Office of Nuclear Reactor Regulation |
| References | |
| RO-77-20, NUDOCS 8312210069 | |
| Download: ML20086F314 (2) | |
Text
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IE FILE COPX PHILADELPHIA ELECTRIC COMPANY 2301 M ARKET STREET PHILADELPHIA, PA.19101 12153 841-4ooo h~
37 July 15,1977 6,. 7 ~
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Mr. Victor Stello, Jr.
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Director
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Division of Operating Reactors g
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,;J U.S. Nuclear Regulatory Corrmission Gj,
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Washington, DC 20555 SJBJECT:
ENVIRONMENTAL DEVIATION 5
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Dear Mr. Stello:
The following deviations were reported to Mr. Greenmen, Office of Inspection and Enforcement, Region 1, United States Nuclear Regulatory Commission on July 7,1977
Reference:
License Number DPR-44/56 Environmental Technical Specifications:
2.2.2 Report No.:
50-277/278-77-20 Report Date:
July 15, 1977 Deviation Date: July 6,1977 Facility:
Peach Bottom Atomic Power Station Units 2 and 3 R. D. 1, Delta, PA 17314 Identification of Deviation:
The pH for the settling basin effluent exceeded the Environmental Technical Specification limit.
Conditions Prior to Deviction:
Settling basin operating with long path. Raw water sump in automatic mode of operation. One waste neutralizing tank being dis-charged to the settling basin. Regeneration of a make-up demineralizer in progress.
8312210069 770715 PDR ADOCK 05000277 S
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COPY SENT REGION
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g wii1 772020307
Mr. Victor Sto Jr.
50-277/278-77-20 July 15, 1977 Page 2
Description of Deviation:
The daily grab sample from the settling basin effluent on July 6,1977 measured a pH of 9 3 The verification sample measured 9.6.
The Technical Specification limit is that pH shall be within the range of 6.0 to 9.0.
Designation of Apoarent Cause of Deviation:
One neutralizing tank was being discharged to the settling basin.
During this operation, the operator pumped acid to the second neutralizing tank. He then pumped caustic to that tank to complete neutralization.
Howe ver, the piping is such that the acid and caustic were pumped directly to the discharge of the neutralizing pumps.
Since the pH meter that trips the neutralizing pumps is on the suction of the pumps, it did not measure the acid or caustic being released to the settling basin.
Analysis of Deviation:
The improper pH condition existed for less than I hour af ter detection. Because the settling basin flow is diluted by a f actor of about 10,000 with circulating water flow, the pH change of the circulat-ing water leaving the discharge canal was insignificant. Therefore, the environmental impact was minimal.
Corrective Action:
The settling basin was isolated and neutralized. After the pH was checked, the system was returned to normal operation. Signs were placed on the neutralizing tank pump discharge valve to the settling basin, the acid valve to waste neutralizing tanks, and the caustic valve to waste neutralizing tanks to ensure that the acid and caustic valves are closed before the neutralizing tank discharge valve to the settling basin is opened. Also, the procedure for discharging a neutralizing tank was revised to require closing the acid and caustic valves before discharging a neutralizing tank.
Failure Daca:
Similar previous occurrences.
Very truly yours, M/J.Coone S perintendent Generation Division-Nuclear cc:
Mr. J. P. O'Reilly
-l NRC, Reg. Office