ML19321A051

Proposed Change to Ets,Section 2.1 Re Thermal Discharge Limits

ML19321A051
Person / Time
Site:	Browns Ferry
Issue date:	07/14/1980
From:	TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML19321A050	List: ML19321A049 ML19321A051
References
NUDOCS 8007220377
Download: ML19321A051 (1)

Text

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2 4 LIMITING

~~ % CONDITIONS FOR OPERATION 2,1 THER!ML DISCHARGE LIMITa, Monitoring Requirement Objective

• Reservoir water temperatures used to help show cc pliance The purpose of this speelfication is to with rpplicable standards vill limit the therr al stress en aquatic life be measured at the ote-meter and in Wheeler Reservoir by operating Browns two-meter depths and averaged to Ferry Nuclear Plant so as to meet the give a tc=perature applicable to applicable veter quality temperature the five-foot depth, which is the standards of the State of Alabama. Point of application of thq current Alabama temperature standards.

Specification Three ther=al monitors spaced across the reservoir in the einity of The maximum plant-induced temperature river mile 293.5 shall be used to measure downstream mixed water te=p-rise and the maximum water temperature cratures. The system.is designed measured downstream of the plant dis- so that the downstream monitors serve charge in Wheeler Reservoir caused by aa backup for one another. The the discharge of condenser cooling ***"#"*Y # th* * "It #I"8 '~ % ~

ment and the sensitivity of water shall not exceed the applicable maximum limits as specified by NPDES thermister sensors arg desicned to be 10.3 F and 0.01 F, respec-Perrait No. AL0022080, which has been tively. The locations of temper-issued by the Environmental Protection ature monitors are displayed in Agency.* Figure 2.1-1.

If these limiting conditions are The plant-induced temperature rise shall be computed using a ec=puter predicted, the plant operator shall model for the mixing of the plant initiate control measures. The control discharge. This rodel requires =eas-measures shall be (1) to reduce the ured plant data as well as downstrean waste heat discharged to the reservoir reservoir temperatures as inputs and and/or (2) to request modifications in vill be updated as necessary to the releases from TVA's Guntersville reflect current understancing of discharge mixing predictions.

and/or Wher'er Dams to increase the streamflow by the Erowns Ferry plant. All necessary plant and reservoir data is transmitted to the Browns Ferry meteorological station. The meteorolocical station vill receive the data and record the readings

. once hourly. All data are auto-matically recorded and maintained for record keeping purposes.

Calculations necessary to compute parameters for showing co=pliance vith applicable thermal standards

• The NRC Final Environmental Statement vill be automatically completed by has previously evaluated temperature a computer situated in the meteo-rological station. All measured and conditions in Whceler Reservoir up to and computed data which are used to and including 93 F. The NRC cost- help prevent exceeding the limiting benefit analysis regarding reservoir conditicns vill be trans=itted to the temperature must be reevaluated for control room and vill be visually ang limit. established which exceeds displayed for monitoring purposes.

93 F before that limit is implemented by TVA. In the event the system described is out of service, an alternate method vill be employed three times a day (once each shift) to measure

' the temperature rise and the maximum river vnter te=perature below the plant. When such a method would result in an imminent and substantial endangerment to the 8007220S U safety of personnel, this paragraph shall not app 1y.