ML19209B003
| ML19209B003 | |
| Person / Time | |
|---|---|
| Site: | Hartsville  |
| Issue date: | 09/06/1979 |
| From: | Davis L, Ellis L, Gutterman A ELLIS, L.J., NRC OFFICE OF THE EXECUTIVE LEGAL DIRECTOR (OELD), TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML19209B002 | List: |
| References | |
| NUDOCS 7910050769 | |
| Download: ML19209B003 (4) | |
Text
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UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION BEFORE THE ATOMIC SAFETY AND LICENSING APPEAL BOARD In the Matter of '
TENNESSEE VALLEY AUTHORITY Docket Nos. STN 50-518 STN 50-519 (Hartsville Nuclear Plants STN 50-520 Units l A, 2A,18, and 2B)
STN 50-521 STIPULATION In response to the Appeal, Board Order in ALAB-554S and in order to provide assurance that the pink muckett pearly mussel (Lampsilis orbiculata) will be protdcted during construction of the Hartsville Discharge Diffuser, it is hereby stipulated by and between Counsel for the NRC Staff, Counse'l for the Applicant, and Counsel for the Intervenors, that the following underlined wording, if approved by the Appeal Board, will amend the Hartsville Monitoring Plan 2_/ and Construction Permit:
Diffuser Excavation Period 3_/
1.
Prior to initiation of the dredging activity, the Permittee shall give three weeks written notice of the planned construction schedule to the NRC Staff, the Intervenor, the U.S. Fish and Wildlife Service, the U.S. Environmental Protection Agency and the State of Tennessee.
1/ Tennessee Valley Authority (Hartsville Nuclear Plant, Units lA, 2A,18, 28),
ALAB-554, NRC (July 11,1979).
_2/ Reported at 3 NRC 523-525.
_3/ Hartsville, supra, at 525.
1128 064
?910050
?$
. 2.
Sedimentation traps will continue to be placed at the same stations
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used in the prediffuser excavation period.
The traps will be returned twice per 8-hour dredging crew working shift (onc'e' after 4 haurs and once after 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />) during excavation of approximately the first 1,000cubicyardsofmaterial.1/ Additicnal sedimentation traps $ill' be placed at the same stations to provide a measure of the accrecate (total) deposition of silt which results from the constr,uc3 ion activity
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during the excavation ceriod. Apolicant will determine the depth of
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sediment deposited in the traps.
If one-quarter inch or more aggregate
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sediment is found to have been deposited in at least two samole traps, credging will be stopped.
Dredging may be resumed if later observation of sediment traps shows that the aggregate sediment deposition has been reduced to less than one-cuarter inch.
Before using any artificial means to remove the sediment, Acolicant will obtain the concurfence of th_1_ _
Department of Interior.
_l/ 8 NRC 525, item 1.
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1128 06S
Turbidity levels of the river abov,e and below the dredging activities
~3.
will be measured at 1-meter depth intervals from surface to the bottom
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and averaged over the water column to document changes in natural l
r, turbidity levels resulting from these activities.
Samples will be taken hourly during excavation. Natural turbidity levels of' record as defined in the Hartsville Nuclear Plapt's ER will be the feedback criteria for regulating the rate of instream dredging.
Maximum documented levels of turbidity are 85 ppm (JTV).S 4_.
Measurement of light intensity in the water column will be performed with a submarine photometer both above and below the dredging activities.
Measurements will be made hourly during excavation. A 50 percent reduction in the depth of 0.1 percent of the light transmission at some selected point at the mussel bed relative to an upstream location (above the dredging activities) will be the feedback criteria' for instituting corrective mitigative actions. 2f 5.
Should the aggregate silt deposition or turbidity levels or light penetration data indicate a need for mitigative action, the inspector will report his findings and make his recommendation to the project environ-mental engineer, who will present these findings and recommendations to the project manager.
The project manager will make the decision on the mitigative actions to be taken, i.e., to sicw down or halt construction. 3/
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_1/ 8 NRC 525, itam 2.
_2] 8 NRC 525, ite'm 3.
J/ 8 NRC 525, item 4.
1 28 066 e
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t Dissolved oxygen, pH conductivity > and temperature profiles will be 6.
made at upstream and downstream locations to %cument any perturbations of these parameters. S 7_. During blasting activities, mussels will be placed by scuba diyers at established intervals frca the area of the blasting to determine if mussels on the Dixon Island bed are harmed by shock waves from these activities.E o threatened or endangered scecies will be used.
l N
t Within 30 days after comoletion of the dredging activity, the Permittee _
8_.
shall submit to the NRC Staff a summary recort of the results of the monitoring plan with copies to the Intervenors, the U.S. Fish and_
Wildiife Service, the U. S. Environmental Protection Agency and the State
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of Tennessee.
M A%
N.
"L. Dow Davis for Willim D. Paton Counsel for NRC Staff Y
]h w Alvin H. Gutteman, Esq.
Counsal for TVA f
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/
e Y
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pt:f:
th lil < -
- leroy J/Ellis, III, Esq.
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Counsel / fo'r Intervenors 1128 067 l/ 8 NRC 525, item 5.
2/ S NRC 525, item 6.