ML20134H658

Special Rept:On 970115,groundwater Level at Piezometer P-22 Noted Above Maximum Water Level by 0.51 Feet.Cause Indeterminate.Will Continue to Monitor Piezometers on Quarterly Basis & Will Install Addl Piezometers

ML20134H658
Person / Time
Site:	North Anna
Issue date:	02/04/1997
From:	Kansler M VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
96-561A, NUDOCS 9702110399
Download: ML20134H658 (2)

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l VIRGINIA ELucTHIC AND PownH COMPANY HICHMOND, VIRGINIA 20061 February 4, 1997 United States Nuclear Regulatory Commission Serial No.96-561 A Attention: Document Control Desk MPW Washington, D.C. 20555 Docket Nos. 50-338 50-339 License Nos. NPF-4 NPF-7 Gentlemen: l 1

VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNITS 1 AND 2 SERVICE WATER GROUND WATER SPECIAL REPORT North Anna Technical Specifications Section 6.9.2 requires a Special Report be submitted when groundwater levels specified for the service water reservoir have exceeded the current maximum water level. Special Report, Serial Number 96-561, was previously submitted on December 10, 1996, to document piezometer P-22 l exceeding the maximum water level. On January 15,1997, the groundwater level at piezometer P-22 was again noted to be above the maximum water level by 0.51 feet. '

As indicated in the previous report an engineering evaluation was performed to determine the cause of the high ground water and the influence on the stability of the service water reservoir dike. The increased water level does not indicate a significant reduction of the stability of the service water reservoir dike. We are continuing with the action plan outlined previously. The piezometers along the southeast portion of the dike are being monitored on an increased frequency (quarterly basis) for a year to better determine any trend in the water levels. Additional standpipe piezometers will be installed at the toe of the slope of the dike along the southeast section to provide further information relative to groundwater conditions in the area of the two existing  ;

piezometers (P-21 and P-22). j No new commitments have been made as the result of this special report. This report has been reviewed by the Station Nuclear Safety and Operating Committee. Should  ;

you have any questions regarding this report, please contact us. '

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Very truly yours,

' /f (D

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.R ansler Vice, President - Nuclear Operations

.110014 9702110399 970204 PDR ADOCK 05000338 S PDR_

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.cc: - U. S. Nuclear Regulatory Commission Region 11 101 Marietta Street, N. W.

Suite 2900 Atlanta, Georgia 30323 Mr. R. D. McWhorter NRC Genior Resident Inspector North Anna Power Station e

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