ML20042E086

Responds to Issues Noted During 891204-06 Compliance Sampling Insp.Corrective Actions:River Level Monitoring Sys Inspected at Least Twice Per Month & Diffuser Pond Bubbler Gauge Sys Inspected Once Per Wk

ML20042E086
Person / Time
Site:	Sequoyah
Issue date:	04/02/1990
From:	Schmierbach M TENNESSEE VALLEY AUTHORITY
To:	Stewart P TENNESSEE, STATE OF
References
NUDOCS 9004200065
Download: ML20042E086 (3)

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- ', TENNESSEE VALLEY AUTHORITY

s. .SPB 25 201P Knoxville, Tennessee 37902

'APRDilwo Mr. Philip L. Stewart, Manager Chattanooga Field Office Division of Water Pollution Control Department of Health and Environment 2501 Milne Street Chattanooga, Tennessee 37406-3399

Dear Mr. Stewart:

1ENNESSEE VALLEY AUTHOR 11Y - SEQUOYAH NUCLEAR PLANT - COMPLI ANCE SAMPLING l INSPEC110N CONDUCTED DECEMBER 4-6, 1989

REFERENCE:

LE11ER PHillP L. S1EWAR1 TO M. PAUL SCHMIERBACH, FEBRUARY 27, 1990 1

This is in response to the two issues addressed in the referenced letter.

l- 1. 1he river-level monitoring system is inspected at least twice per month.

The dif fuser pond bubbler gage system is inspected once per week and its reading is compared to the pond-level reference point. A checklist is completed for each weekly inspection and copies are now being filed in Sequoyah Chemistry and Environmental Files for ready access during future audits.

The dif fuser trash racks were inspected by divers on-March 15 and confirmed to be clean. We have begun a series of cross-sectional velocity measurements in the diffuser pond to calibrate the flow measurement equipment.

The first measurement was made on March 22 with two Condenser Cooling Water (CCW) pumps in service. One power unit is in a refue; Mg outage which permitted the low CCW flow.

Additional measurements are scheduled with three CCW pumps in operation and low Chickamauga pool elevations in April or May.

Three more measurements will be scheduled later in the spring or summer as both units come back to full power with 4, 5, and 6 CCW pumps, respectively, operating.

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l APR 021990 Mr. Philip L. Stewart

2. We apologize for the lengthy time required to gain access into the radiologically controlled area to sample the liquid radwaste (DSN 104) and the cooling tower blowdown (DSN 106). As you know, the access procedures are required by the Nuclear Regulatory Commission (NRC) and are for the protection of all personnel entering the area. We will strive to start-this process earlier the next time your staf f ~ schedules an inspection.

Contrary to information obtained during the inspection, there is no common sampling point for DSN 104, OSN 106, and the Condensate Demineralizer Waste (DSN 105). Each of these waste streams dischtrge separately into the Cooling lower Blowdown line. All of the discharges are underground and are upstream of the Cooling Tower Blowdown radiation monitor sample point.

Due to NRC requirements, even samples containing low levels of radioactive material are not allowed to be released to anyone other than those licensed to transport and/or receive radioactive samples. We would have to be assured that your staff has the appropriate license for collecting, transporting, and analyzing samples before samples could be obtained from OSN 104 and DSN 106.

Ilowever, the combined waste stream (Cooling Tower Blowdown plus OSN 104, DSN 10$, and DSN 106), would normally have radioactivity levels satis-f actory for transporting of f site. 1herefore, we suggest that the sampling point for DSN 104, DSN 105, and DSN 106 be identified as the Cooling Tower Blowdown radiation monitor sample line.

If you have any questions regarding this response, please contact Abraham H.

Loudermilk, Jr., at (615) 632-6656 in Knoxville.

Sincerely, ,

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d'M.'aulSchmierbach, Manager Environmental Quality cc: Mr. Ray Cunningham, Director Water Management Division United States Environmental Protection Agency Region IV 345 Courtland Street, NE.

Atlanta, Georgia 30365 .

I Sequoyah Resident inspector Sequoyah Nuclear Plant 2600 Igou Ferry Road Soddy Daisy, Tennessee 37379 Continued to page 3

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,. APR 021990 Mr. Philip L. Stewart cc: _ V.S. Nuclear Regulatory _ Commission \( f Attn: Document Control Desk Washington, D.C. 30323 Mr. Garland P. Wiggins Environmental Manager 1 Division of Water Pollution Control l

i Tennessee Department of Health and

Environment Bureau of Environment TERRA Building

' 150 Ninth Avenue, North 4' Nashville, Tennessee 37219-5404 1

Mr. B. A. Wilson, Assistant Director '

for Inspection Programs TVA Projects Division U.S. Nuclear Regulatory Commission Region 11 1101 Marietta Street, NW., Suite 2900 Atlanta, Georgia 30323 h

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