ML20100E334
| ML20100E334 | |
| Person / Time | |
|---|---|
| Site: | River Bend  |
| Issue date: | 11/30/1984 |
| From: | William Cahill GULF STATES UTILITIES CO. |
| To: | |
| Shared Package | |
| ML20100E279 | List: |
| References | |
| ENVR-841130, NUDOCS 8412060210 | |
| Download: ML20100E334 (85) | |
Text
- RIVER BEND STATION '
ENVIRONMENTAL REPORT OPERATING LICENSE O STAGE SUPPLEMENT 9
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('~\ - Acknowledgement of Receipt of Supplement'to Environmental Reports-Operating. License Stage River Bend Station e
Please sign, date,-and return this sheet to:
- L. L. Dietrich Lead Licensing Engineer Stone & Webster Engineering Corporation 3 Executive Campus P. O. Box 5200 s
Cherry Hill, NJ 08034 g Receipt of Supplement 9 to the Environmental Report -
Operating License Stage is acknowledged.
My copy. has been brought to current status and superseded pages have been removed and destroyed, as applicable, f-~. Change my-address as follows:
'k Please reassign this manual to:
Signature Date Set Number 1
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. SUPPLEMENT 9 INSERTION INSTRUCTIONS RIVER BEND STATION ENVIRONMENTAL REPORT.- OPERATING-LICENSE STAGE <-
- The following instructions are for the insertion of Supplement-9 into the RBS ER-OLS. Remove the pages, tables, and/or figures listed in the RE-MOVE column and replace them with the pages, tables,-and/or figures list-
- ed :inL the -INSERT column. Dashes (---) in ' either column indicate no-
. action required.
o l' Vertical bars have been placed in the margins of inserted pages and ta-
.. bles to indicate revision locations.
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!' RBS ER-OLS TABLE.1.2-1-(Cont):
Authorization Date or he_ncy Required Authority Request Status Construction Per- Atomic Energy Act 10/26/79- . Cranted 10/3/80.
'mit Amendment and of 1954 as amended,-
Unit 1 Joint- and 10CFR50 y ownership Li Operat ing Atomic Energy Act 4/81 Application submitted i License of 1954 as amended,-
' and under review. .]g- '
and.10CFR50 Special Nuclear Atomic Energy Act 4/16/84~ Application submitted ( l '9' 6 Materials of 1954 as amended, and under review.
- License and 10CFR70 By-Product Nuclea r 10CFR30 12/9/82 Application submitted. g Lv Material License and under review.
Fede ra l Aviation River crossing 14CFR77 7/14/77 Approval granted Admini st ra tion by transmission 7/28/77.
towers Environmental NPDES permit for FWPCA Section 402 5/21/75.' Permit No. LA0047112 Protection construction ( P.L.92-500) issued 12/18/75.
Agency Request for addi-tional discharge granted 4/29/76.
NPDES permit for. FWPCA Section 402 9/5/74 Permit No. LA0042731 ope ra tion ' ( P. L.92-500) issued 8/4/78.
Supercedes Pereit No.
LA0047112. g Training Center FWPCA Section 402 6/30/82 Permit No. LA0063886 lg' Sanita ry Waste ( P.L.92-500) issued 7/16/83. 5 Di scha rge Supplement 9 2 of 4 November 1984
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TABLE I'2-1 (Cont)-
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' Authorization Date or -
t -Mency Re_ quired Authority gquest . ElaEss Air Control Burning of con- LACC regulations -10/4/79 Approval granted Commission (LACC) struction vastes. 11/19/79.
amended.through (Now the Air 2/20/78 Poilution Control .l'g Division of the Diesel emissions LACC regulations 7/31/83 Permit No. 3160-00009-00 l' issued 3/2/84.
Orrice of Envi- amended through --
ronmental 2/20/78 Arrairs)
Health and Wells -
5/14/76 Approval g ra nted Human Resources reg i st ra tion 10/21/T6.
Administration Highway Construction of La. Stat. Rev. 11/26/74 Permit No. 96025-Department road between Title 48, Sec. 301 issued 2/24/75.
Rte. 965 and and 344~ Permit extended.
US Rte 61 6/17/75.
(North Access Road)
WEST FEllCIANA !*
PARISH Police Jisry Road modifications -- - Approval g ra n ted .
11/5/74.
Pipelines and.elec- -
2/12/80 Approval granted trical conduit 2/27/80.
crossing under Poiice Jury Road
.l4 Supplement 9 4 of 4 - . Novembe r 1984 .
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) 1.3 SUBSTANTI'.'E INFORMATIONAL CHANGES FROM CONSTF.UCTION FERMIT STAGE Large projects undergo many alterations prior to arriving at a final design. These typically result from regulatory =
changes, design review, improved construction techniques, reseafch and operational experience, regional and national economic conditions,_ and updated monitoring data. Table 1.3-1, lists the significant _ changes from the River Bend Station conceptual design at,the Construction Permit Stage.
It identifies significant changes in design, new information that '
can be econsidered pertinent to the review, and significant changes in conclusions or impacts. It does not identify updated information resulting in similar l conclusions or impacts nor minor changes that do_not affect I the evaluation of information provided. In those cases where an activity or design change could potentially have an adverse environmental impact, a environmental assessment has been performed.
In January 1984, GSU announced the cancellation of Unit 2.
In most cases one-unit site impacts are less than, but in no ,
case greater than, the two-unit environmental impact analysis presented herein.
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2-viib l Supplement 2 March 1982
RBS ER-OLS CHAPTER 2 sl LIST OF TABLES (Cont)
Table Number Title 2.3-10 INDUSTRIAL SURFACE WATER USERS ON THE MISSISSIPPI RIVER BELOW THE RIVER BEND EMBAYMENT (RIVER MILE 262.5) 2.3-11 TRIPS AND DRAFTS OF VESSELS ON THE MISSISSIPPI RIVER FROM THE MOUTH OF THE OHIO RIVER TO, BUT NOT INCLUDING, BATON ROUGE, LOUISIANA FOR 1977 2.3-12 LOUISIANA LANDINGS OF MISSISSIPPI RIVER FISHERIES FOR 1975 2.3-13 COMMERCIAL FISH LANDINGS, 1976 2.3-13a ESTIMATED CONMERCIAL CATCH OF FISH AND 2 SHELLFISH WITHIN 80 KM OF RIVER BEND STATION, 1970-1979.
2.3-14 VARIATION IN CHEMICAL AND PHYSICAL CHARACTERISTICS OF THE MISSISSIPPI RIVER NEAR ST. FRANCISVILLE, LA, USGS DATA 2.3-15 MONTHLY VARIATION IN SELECTED PHYSICOCHEMIC/.L CHARACTERISTICS OF THE MISSISSIPPI RIVER NEAR RIVER BEND SITE, LSU DATA 2.3-16 ALLIGATOR BAYOU WATER QUALITY CHARACTERISTICS, LSU DATA 2.3-17 GRANTS BAYOU WATER QUALITY CHARACTERISTICS, LSU DATA 2.3-18 GROUNDWATER QUALITY ANALYSES 2.3-18a RADIOLOGICAL CHARACTERISTICS OF GROUNDWATER 2l 2.4-1 DESCRIPTION OF THE SOILS OF THE RIVER BEND SITE 2.4-2 PHYLOGENETIC LIST OF PLANT SPECIES FOUND AT
. THE RIVER BEND SITE 2.4-3 DOMINANT OVERSTORY TREE SPECIES AND AREA OF EACH MAJOR FOREST TYPE, RIVER BEND SITE Supplement 9 2-viii November 1984 0
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CHAPTER 2 LIST OF TABLES (Cont) l8 Table Number Title 2.4-4 MAJOR'UNDERSTORY PLANT SPECIES OF MAJOR
. FOREST TYPES 2.4-5 CURRENT SUCCESSIONAL STATUS AND THE EXPECTED CLIMAX STATUS OF THE 18 VEGETATIVE TYPES >
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Supplement 2 2-viiib March 1982 I
, 'RBS ER-OLS CHAPTER . 2 ENVIRONMENTAL DESCRIPTIONS
2.1 DESCRIPTION
OF THE STATION LOCATION River Bend' Station is located in West Feliciana Parish 3 km (2 mi) east of the . Mississippi - River and approximately 38.4.km (2 4 mi) north-northwest of Baton Rouge, Louisiana.
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The -Unit 1 reactor is located -in the northeast corner of the property and is centered at latitude 30 deg, 45 min , 26 sec north; longitude 91 deg, 19 min , 54 see west. The Universal
' Transverse Mercator coordinates - are 3,403,705 m Northing, -
659,678 - m Easting.
The Unit 2 reactor is centered at latitude 30 deg, 45 min,
- 24. sec north; longitude 91 ~ deg, 19 min, 58 sec west. The Universal Transverse Mercator coordinates are 3,403,628 m.
Northing, 659,576 m Easting.
All' principal- station facilities for Units 1 and 2 are l
located in Township 3 South, Range 2 West, Section 58.
! .The site location and the area within 80 km (50 mi) are l shown in Fig. 2.1-1. The-10-km (6-mi) region is shown in
! the site' area map, Fig. 2.1-2.
L i The site comprises approximately 1,352 ha (3,342 acres) .
l The land is owned by' GSU, with the- exception of a 0.7-ha (1.7-acre) parcel which is the site of'a microwave tower owned by American 'Ihlephone 6 Telegraph. Transportation rights-of-way for the site have been granted. Land
-ownership is discussed further in Section 2.2.1. The i property boundaries are shown on Fig. 2.1-2 and 2.1-3 and extend from the Mississippi River's east edge approximately
_4 km -(2 1/2 mi) inland.
l The site is principally on -two topographic levels. One
- level _is an ~ alluvial floodplain along the river at an
[ elevation of about 35 ft mean sea level (msl) , and the other
- l. is an upper terrace with an average elevation of over 100 f t l msl. The station buildings are located on the upper L terrace. Original ground grade was approximately el 110 ft f 'msl. Finished ground grade for the reactor and turbine plant is e.'. 95 ft msl, and the ground grade at the cooling
' towers is el 105 ft ms1. 'Ihe ' site topography is shown in Fig. 2.1-3.
2.1- 1
RBS ER-OLS The site is well drained by Grants Bayou on the east and Alligator Bayou on the west. Just south of GSU property, Grants Bayou enters Alligator Bayou, which then flows south into Thompson Creek. Thompson Creek enters the Mississippi River approximately 8 km (5 mi) downstream of the site.
Site drainage is discussed further in Section 2.3.
The site is heavily wooded; however, several open fields dot the landscape. The terrestrial characteristics of the site are discussed further in Section 2.4.
US Highway 61 is a major north-south route, which runs in a general east-west direction just north of the site, and is a minimum of 1.6 km (1 mi) from the nearest reactor (Unit 1).
State Highway 965, a paved, two-lane secondary road, traverses north and south into the center of the property-and passes within 825 m (2,700 ft) of the nearest reactor (Unit 2). At the road-railroad intersection west of the reactor, this state highway becomes a Police Jury (the authorized parish governing body) road and continues south and ther east and north, connecting back into US Highway 61 east of the reactors.
An unimproved parish road parallels the river bank at the extreme west edge of the property. This road, known as River Road, is approximately 2.7 km (1.8 mi) from the Unit 2 reactor at its nearest point.
Two new roads were constructed as a part of plant construction. One, referred to as River Access Road, runs from River Road near the intake facilities to Police Jury Road and serves as a river access and haul road. The second new road, referred to as North Access Road, connects l US Highway 61 and State Highway 965. This road serves as l the principal station access road and passes within 540 m (1/3 mi) of the reactors (Fig. 2.1-3).
A single line of the Illinois Central Gulf Railroad traverses the site in a northwest-southeast direction and passes about 610 m (2,050 ft) south of the Unit 2 reactor.
A rail spur has been constructed from the Illinois Central Gulf Railroad to Units 1 and 2, as shown in Fig. 2.1-3. In 1984 GSU purchased from the Illinois Central Gulf Railroad
., 1.9 km (1.2 mi) of railroad lying south of the rail spur.
From this junction northward past GSU's property, the Illinois Central Gulf Railroad is abandoning the track.
There are no pipelines crossing the property.
! Supplement 9 2.1-2 November 1984
RBS ER-OLS
-(\/-3 ; ' LThere are a few residences along State Highway 965 near the but nearest town northern property- line, the is St. Francisville, which had an estimated population of 1,495 in 1978 and is located approximately 5 km (3 mi) northwest of the site.
There are two large industrial ~ facilities in the area.
Cajun Electric Power Cooperative's Big Cajun Number 2, a coal-fired. generating station is directly across the Mississippi' River in Pointe. Coupee Parish, approximately 5'km (3 mi) from the reactors. The other facility, the Crown Zellerbach Corporation papermill, -is approximately-4 km'(2.5 mi) from the reactors, south of the site.
The nearest commercial airport is Ryan Airport in Baton Rouge, located 19 mi southeast of the site.
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[ Supplement 9 2.1-3 November 1984 iO
4 RBS ER-OLS-GN- 2.2 LAND n'd ~
2.2.1 ;The1 Site and Vicinity-
~2.2.1.1- The Site
- The parcel .of'. property on which River Bend Station is-located contains a total of 1,352 ha (3,342 acres), of which
. -nearly. _all but the- land located in- transportation rights-of-way is owned by GSU. The major-land use on the
- property is. .the -electric generating and transmission facilities required by the two-unit station. A description
-: of; station facilities and their- land requirements is included in.Section.4.3.1. Property bo?tndaries and station layout-are presented in Fig. 2.1-3.
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. There .are several other land uses on or adjacent to the property that will continue during station- operation. As~
indicated in Fig. 2.1-3, the property is bounded on the northeast by US Highway.61, the major road between St.
Francisville and! Baton : Rouge. Other roads that cross the property include State: Road 965 and Police Jury ' Road which is .its extension; Rive- Road (a minimum maintenance-Police Jury. Road) and. River Access Road connecting River Road to Police Jury Road (with a spur to the Wildlife Management g-s Lake);- and North -Access Road, constructed 'between US- ,
"L g'-'j Highway 61 and State Road 965. oof these only River Access 1 Road ~and: North-Access Road' belong to' Gulf StatesE Utilities.
River Road and Police Jury Road belong to West Feliciana Parish; others are state or federally owned.
None of these roads will be closed to public.use because of normal -station operation. Undero emergency conditions,.
access to- the plant by way of State Road 965 and to North b
Access Road will be limited.
A 3.6-km (2.3-mi) section of the Illinois Central Gulf q Railway crosses- the property. GSU purchased from the Illinois Central Gulf Railroad the 1.9 km (1.2 mi) stretch of railroad lying south of the GSU rail spur down to the GSU S property ~ boundary. The track lying north of the rail spur past GSU's property is- to be abandoned by the Illinois Central-Gulf Railroad.
An existing-69-kV transmission line belonging to Gulf States Utilities crosses the property on an abandoned railroad line
> that runs roughly parallel to the Mississippi River. This transmission line serves the St. Francisville region and the 3
Louisiana State Penitentiary in Angola.
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RBS ER-OLS The Starhill Radio Tower is located just north of the intersection of State Road 965 and North Access Road, approximately 1 km (0.6 mi)- from the Unit 2 reactor, the nearer of the two units. .This microwave tower is part of the long-distance telephone relay line between Lake City, Florida and Houston, Texas. It is an installation for which access 24 hr a day, 7 days a week is required for routine maintenance and emergencies <21 The microwave tower and its 0.7-ha (1.7-acre) parcel will continue to be owned and operated by American Telephone and Telegraph. Access vill not be restricted during operation of River Bend Station.
No major residential areas are located adjacent to the site,
'but a small residential area is presently located on GSU property along State Road 965. In addition, there is one house on US Highway 61 adjacent to the North Access Road.
4 Upon plant startup, land leases on the River Bend property will be discontinued, as well as housing leases along State Road 965. Residents of the house on US Highway 61 will be permitted to stay.
The western portion of the property is a wildlife management area which will contain a lake of approximately 13.8 ha (34.2 acres). A road will be constructed from the River Access Road to the Wildlife Management Lake. This area will lend itself to use as an outdoor classroom where principles and practices of conservation may be taught to local ll schoolchildren. A path around the lake's edge will provide 4- access. A land and wildlife management policy is being developed for the River Bend Property.
Approximately 950 acres of the site are considered wetlands by the Louisiana Wildlife and Fisheries Commission and the U.S. Fish and Wildlife Service. Construction within onsite wetlands has been limited to the extent possible, in compliance with Executive Order 11990 (Protection ,of Wetlands). Approximately 15 acres were removed for construction of River Access Road and the embayment.
About 830 acres of the site are Mississippi River floodplain. West Creek and a portion of Grants Bayou, and their associated floodplains, are included within the site boundary. In accordance with Executive Order 11988 (Floodplains), construction activities in floodplains have been minimized to the extent possible. Adequate flood protection is provided for plant structures and equipment.
Supplement 4 2.2-2 February 1983 O
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- and originates a daily shuttle' between Zee and both St.
(_/- Francisville to the west and Slaughter to the-east'18 Use of. the line could grow if customers _were to request rail transport. There are no plans at present to expand the current . level of service. In 1984 GSU purchased from the Illinois. Central Gulf Railroad 1.9 km (1.2 mi) of railroad lying south of the. rail spur. From_this junction northward S past GSU's property, the Illinois Central Gulf Railroad is abandoning the. track.
In the southeastern portion of-the 10-km area, the Louisiana and Arkansas Railway runs north from Baton Rouge to Port Hudson as far north as the Delombres Station. To the southwest of River Bend Station, the Missouri ' Pacific Railway has a line which touches the 10-km radius in the vicinity of New Roads. A spur of the rail line has been constructed to serve Big Cajun No. 2. Rail lines beyond the-10-km radius are discussed in Section 2.2.3.
There are no airfields within the 10-km radiusts) ,
Airfields in the region between 10 and 80 km are discussed in-Section 2.2.3.
The main water transportation route passing near the plant site is the Mississippi' River, approximately 3 km (1.9 mi)
() Level of use is discussed in f-s west of the plant.
Section 2.3.2. The first river crossing north of Baton Rouge is located in St. Francisville, where a car-truck ferry connects the river landing at Route 10 with Pointe Coupee Parish. The ferry operates 24 hr a day, 7 days a week. In 1978, the New Roads Ferry carried a monthly average of 27,500 cars and 2,030 trucks, making an average of 2,600 crossings. In April of 1979, a second ferry, the St. Francisville, was put into service at the same crossing'78 When the ferries are out of service, the l' nearest river crossing is at Baton Rouge. The replacement
- of the ferry with a bridge discussed earlier in this section would e-liminate interruptions in service caused by maintenance, weather, or other problems.
Pipelines in the vicinity of River Bend Station are located in the southern and eastern quadrants of the 10-km radius area. They run generally in the direction from New Roads L toward Jackson, crossing the Mississippi River near River Mile 261, about 1.5 river miles downstream of the intake embayment. Descriptions and locations of pipelines are i shown in Table 2.2-2 and Fig. 2.2-2.
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All industries and manufacturing firms within 10 km of the l site are presented in Table 2.2-3 and Fig. 2.2-2. The three l
l Supplement 9 2.2-5 November 1984 I ('N I
RBS ER-OLS closest to the River Bend site are discussed here. The closest industry is Lambert Redi-Mix Company, located north of the site on US Highway 61, approximately 1.8 km (1.1 mi) from the plant.
O Supplement 9 2.2-Sa November 1984
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Supplement 9 2.2-5b November 1904
RBS ER-OLS Redi-tiix employs 16 workers in the making of ready-mixed concretece).
Across the Mississippi River approximately 5 km (3.1 mi) west-southwest of the reactors is Cajun Electric Power Cooperative's Big Cajun No. 2 power plant. Three coal-fired units are scheduled to come on line in the early 1980s with a full-time work force of 120. The construction work force for Unit 3 is expected to range from approximately 300 to a peak of 1,100. The total permanent work force when the three units are in operation is expected to be 150.
Joan of Arc Company is a food processor which employs from 86 to 500 depending on seasonal variations (9). The company is located approximately 5.3 km (3. 3 mi) west-northwest of the station in St. Francisville on the Illinois Central Gulf rail line and the Mississippi River.
The major extractive industry within the 10-km radius is the Holloway Gravel Company located at the Thompson Creek Gravel Pit. The company extracts sand and gravel from the pit, which is approximately 5.5 km ( 3. 4 mi) southeast of River Bend Station.
Within the 10-km radius, there are two gas wells, which are shown in Fig. 2.2-2. One well in West Feliciana Parish is located on Crown Zellerbach property, approximately 5.5 km (3. 4 mi) sauth-southeast of River Bend Station. In Pointe Coupee Parish, Hunt Energy operates a well about 7.1 km (4. 5 mi) southwest of the station. It is likely that other wells for natural gas or oil will be drilled in the region; however, there are no permit requests outstanding at the present timeC10).
There are no major institutions within the 10-km radius.
Those that are between 10 and 80 km of the station are discussed in Section 2.2.3. Schools within 10 km of the station are those in the West Feliciana Parish School District: St. Francisville Junior and Senior High School, and the Bains Elementary School, both approximately 9.0 km (5.6 mi) north-northwest. The West Feliciana Parish Hospital and the West Feliciana Parish Jail are the only local institutions of their kind within the 10-km radius.
These and other local institutions within 10 km are discussed in Section 2.5.2.
Several public and private recreational areas presented in Table 2.2-4 and Fig. 2.2-3 are located within 10 km of River Bend Station. The recreational area closest to the site is the Audubon Lakes Camping Resort, located approximately 3 km 2.2-6
RBS-ER-OLS
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valley with relatively steep slopes. The channel-and valley
--become-broader in the downstream direction. Within .the Mississippi Liver floodplain, the bayou flows in a shallow 2:
trough between the Mississippi River natural levee and the escarpment bounding the valley. In that region, the ctream
. flows through a small, standing water body known' locally as Needle . Lake. The' lake is about 1,700 ft long and 40 ft in average width (about 1.5 acres). Water depth is normally about 3 ft. A rise in water level due to local. storms floods the sr.rrounding sump area.
Alligator Sayou is subject to short periods of high runoff or storm floods, and extended drought periods of zero flow.
The U.S. Geological Survey has maintained a crest stage
. gauge on Alexander Creek from 1953 to the present (noncontinuous). The drainage area at this point in the-creek is 23.9 sq mi. The estimated flood flow distribution for. Alligator Bayou, based on Alexander Creek data, is shown in Fig.'2.3-11. This figure also shows the estimated flood flows for the West Fork- Thompson Creek flow gauge (1950-1970). During flood flows Alligator Bayou carries an increased sediment load and provides an appreciable amount of sediment deposition within the floodplain area. Most sedimentation occurs as Alexander Creek leaves the hills and enters the alluvial valley. Channcl length from the ew. headwater to the southern GSU property line is about 18 mi.
f A' profile of the channel bed is shown in Fig. 2.3-10.
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River Access Road, extending from the plant to the Mississippi River, has been constructed across Alligator 4 Bayou- for the purpose of providing access to-the intake
< structure and barge slip area and-as a means of conveyance of heavy construction loads. This road will remain after plant construction is completed. Culverts have been placed
- in this roadway to allow passage of flow through Alligator Bayou to Thompson Creek and the' Mississippi River. Appendix 2B presents a study of the effects of River Access Road construction on Alligator Bayou hydrology. Attachment A~ of Appendix 2B further summarizes major flood events observed 7
-since 1981 and presents an update of the flood study incorporating the collected data. Section 4.6.2 details the effects of plant features on erosion, explaining the various 1 erosion control measures which have been undertaken.
Several small farm ponds are located in the site vicinity.
Locations of these ponds and approximate sizes are prasented in Section 4.2.
Local drainage courses subjected to extremely severe ls meteorological and geological conditions could cause limited Supplement 9 2.3-5 November 1984
RBS ER-OLS flooding in the site area. The design flooding condition 8 is the unlikely event of a Probable Maximum Flood on West Creek and Grants Bayou. The plant area O
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RBS ER-OLS proper would not be flooded for this event. No plant i safety-related equipment would be endangered because all are located in buildings sealed from flood water entry or flood-protected to 98 ft mal. As discussed in FSAR Section 2.4, rainfall collecting in the Unit 2 excavation during extreme meteorological events would not affect plant safety from the standpoints of either ponding or seepage.
In accordance with Executive Order 11988, Floodplain Management, the following description is provided of the floodplain at the River Bend site.
River Bend Station is located above the Mississippi River floodplain on elevated, gently sloping terrain, approximately 2 mi east of the river at about River Mile 262. The alluvial floodplain of the east side of the river varies from 3,000 to 4,000 ft wide, and is at about 35 ft msl. The station buildings and all safety-related equipment are located on the upper terrace, which has an average elevation of over 100 ft mal. The original ground grade in this area was about el 110 ft msl. The finished ground grade is el 95 ft msl.
The plant site lies within the watershed of Grants Bayou.
It is drained by Grants Bayou on the east and by Alligator Bayou on the west. West Creek, a tributary of Grants Bayou, drains about 1 sq mi before joining Grants Bayou south of the site. Grants Bayou joins Alligator Bayou in the ll 1
Mississippi River floodplain south of the site. Alligator Bayou joins Thompson Creek 3 miles upsteam of its confluence with the Mississippi River.
The Mississippi River has an extensive floodway system which regulates flood flow and level in the site region. A detailed description of the flood control system is included in FSAR Section 2.4. Historic river water level data are available at St. Francisville (Bayou Sara gauge), about 3 mi upstream of the site. This data can be used to estimate site river levels for most flow conditions. However, the presence of upstream control structures, reservoirs, and an extensive level system along. the river prevents a straightforward probabilistic determination of river leveis at high flow due to upsteam flow storage and diversion. For this reason, the Army Corps of Engineers prepared a Project Design Flood (PDF) study to delineate the maximum expected water levels along the river, taking into account floodway system operation and reservoir storage csi, The PDF has an estimated frequency of occurrence of greater than 100 yr, but no more exact frequency determination is Supplemwnt 9 2.3-6 November 1984 I
s RBS ER-OLS available(78 The PDF is based on tributary and main steam O\ floods predicted by the U.S. Weather Bureau as " maximum possible" and by the Mississippi River Commission as
" maximum probable."'88 The PDF level at the site has been estimated by the Corps of i Engineers to be 54.5 ft mal'88 The floodplain in the site area is . delineated in FSAR Figure 2.4-17. Figure 2.3-11a
-includes the plant structures and the PDF floodplain. The Mississippi River PDF is the controlling 100-yr recurrence flood event for Alligator Bayou and the lower reach of Alexander Creek.
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RBS ER-OLS j
227.5 Long-Term-(Routine) Diffusion Estimates 2.7.5.1 ~ Objective AnnuS1 averagek CHI /Q and D/Q estimates for: continuous and intermittent releases were calculated for each. of. the 16 22.5-deg sectors at receptor locations used to determine the maximum individual and population dose receptors. These CHI /Q 'and .D/Q factors are used in Section 5.4 to estimate the radiation dose to man through a variety of pathways as described in that- section. Grazing season values were
- represented by annual average values since the season was' conservatively assumed to exist year-round. The methodology described in Regulatory Guide 1.111, Revision 1 provided-guidance.for the aforementioned analysis <ts'. The distances by sector between the nearest significant receptor location (used to determine the-maximum individual receptor) and the midpoint between the Units 1 and 2 containment buildings are provided. in Table 2.7-115. With respect to the milk pathway, three milk cow owners (N. Anderson, D. Dedon, and W. Hill) were identified <aa> . The milk cow distances -
presented in Table 2.7-115 and used in the Appendix I dose S analysis represent nearest potential grazing locations in each sector. These locations are all associated with RN. Anderson. The minimum distances by sector between the property and restricted area boundaries, and the routine release. points are in Table 2.7-116. The release point Os design parameters are in Table 2.7-117. The resultant CHI /Q and D/Q values for the maximum individual recept. ors and the population dose-receptors are displayed in Tables 2.7-118 2
through 2.7-129.
. 2.7.5.2 Calculation Techniques 2.7.5.2.1 Nomenclature 2.032 = (2/w) us (2s/16)4 (dimensionless) x = 3.14159... (dimensionless) exp = 2.71828... (dimensionless)
ET = Entrainment coefficie~t (dimensionless) 0 = Terrain recirculation factor (dimensionless)
C = Luilding shape coefficient (dimensionless)
Supplement 9 2.7-15 November 1984 I
<--c e,m .-mewnn=--- .emwwe-,--w,.
RBS ER-OLS x = Downwind receptor distance (m) o z = Vertical dispersion coefficient (m)
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RBS ER-OLS 4
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Supplement 9 2.7-15b November 1984
. - - . _ _ . _ . . _ _ . _ . , _ _ , _ . ~ . . - - , , _ - _ _ - , ~ .,. _ _.._ _ _ _ ___ _ _ _ . _ _ ,___ _ _ ,.__. _ _...___.____ _ -
RBS ER-OLS Ba=
3 30-foot average wind speed (m sec-1)
Gaso = 150-foot average wind speed (m sec-1)
(CHI /Q) = Average concentration normalized by source strength (see m-3)
(CHI /Q) D = Depleted CHI /Q (sec m-3)
P,= Momentum flux (m* sec-a) hb = Building height (m) hr = Release heigt.t (m) he = height Effective release (m) hpr = Nonbuoyant plume rise (m) ht = Topographic height of receptor above P l ant grade (m) d = Stack or vent diameter (m) ue = Efflux velocity (m sec-1)
N = Total number of valid (dimensionless) hours of wind in all sectors for applicable averaging period 6/Q = Relative deposition rate normalized by source strength (m-1)
D/Q s Relative deposition per unit area normalized by source strength (m ')
G = Ground release (dimensionless)
(subscript) i 2.7-16
BBS-ER-OLS
'~
h
')
( , 22. United States Nuclear Regulatory Commission NUREG-OOl6,
-Revision 1. Calculation of- Releases of Radioactive Materials in Gaseous and Liquid Effluents from Boiling Water Reactors (BWR - GALE Code), January 1979.
- 23. Gulf South Research Institute, Livestock Survey for
-Radiation Exposure Pathway Within a Three and One-Tenth ,
_( Five-Kilometer) Radius of GSU's River Bend Nuclear Power Plant Site, April 1980.
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RBS ER-OLS O CHAPTER 3 O
- LIST OF TABLE;i (Cont)
Table Number Title 3.5-8 RADIOACTIVE GASEOUS EFFLUENT FROM SOURCES OTHER THAN OFF GAS (CI/YR/ UNIT) 3.5-9' RADIOACTIVE GASEOUS EFFLUENT FROM THE THREE l
RELEASE POINTS (CI/YR/ UNIT) 3.6-1 EXPECTED COMPOSITION OF REGENERATION WASTES 3.6-2 EXPECTED COMPOSITION OF DISCHARGES TO MISSISSIPPI RIVER 3.6-3 EXPECTEC CONCENTRATION OF HEAVY METALS IN COOLING TOWER BLOWDOWN 3.6-4 EXPECTED CHEMICAL COMPOSITION OF AUXILIARY l BOILER BLOWDOWN 3.6-5 EXPECTED STANDBY DIESEL GENERATOR ENGINE O '
EMISSIONS AT 100 PERCENT LOAD MINIMUM CLEARANCES 3.7-1 i
o k
)
.--r--en- - - , , ~ - ,,.,-v.-e-a- , , - + , _ _-ww--,,,--,ev,__,__--~,,,,,,---.n,,,, y ,-m s__ ,ye-e-,_ -,--,--,,ww, . . - - - - - , , - , , , , - - , - -
E ,
RBS ER-OLS j l
CHAPTER 3 LIST OF FIGURES Figure Number Title l
3.1-1 LOCATION OF GASEOUS RELEASE POINTS l
3.1-2 ARTIST SKETCH sl 3.1.2a ARTIST'S SKETCH UNIT ONE ,
l 3.1-3 VISUALLY SENSITIVE AND INTENSIVE LAND USE AREAS.IN THE VICINITY OF RIVER BEND STATION l 3.1-4 SIMULATED VIEWS OF RIVER BEND STATION FROM ST. FRANCISVILLE FERRY LANDING 3.1-5 SIMULATED VIEWS OF RIVER BEND STATION FROM NEW ROADS FERRY LANDING 3.2-1 STATION FUNDAMENTAL FLOW DIAGRAM l
3.3-1 WATER USE DIAGRAM (COMBINED TWO UNIT OPERATION) 9l 3.3-la WATER USE DIAGRAM (SINGLE-UNIT OPERATION) 3.4-1 HEAT DISSIPATION SYSTEM (ONE UNIT) 3.4-2 CIRCULATING WATER FLUME AND PUMPWELL 3.4-3 INTAKE-DISCHARGE AREA EMBAYMENT DEVELOPMENT 3.4-3a ESTIMATED INITIAL SEDIMENT DEPOSITION LOCATIONS IN EMBAYMENT 3.4-4 MAKEUP WATER INTAKE STRUCTURE PROFILE 3.4-5 DISCHARGE PIPELINES TO MISSISSIPPI RIVER 3.5-1 SOLID WASTE MANAGEMENT SYSTEM 3.5-2 RADIOACTIVE LIQUID WASTE SYSTEM 3.5-3 OFF GAS SYSTEM 3.6-la WATER TREATING SYSTEM P&ID 3.6-1b WATER TREATING SYSTEM P&ID Supplement 9 3-vi November 1984
RBS ER-OLS CHAPTER 3
-(
LIST OF FIGURES-(Cont).
Figure Number Title 3.6-1c WATER TREATING SYSTEM P&ID 3.6 WASTE WATER TREATMENT P&ID 3.6-3 COOLING TOWER WATER TREATMENT O
"""' ~ "' ' '~ ~ " " " " " " "
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i RBS ER-OLS 13 '. 3 PLANT WATER USE
~0 l
V 3 . 3 .1' Water Consumption Fig.'3.3-1 presents a schematic flow diagram of. station water use and. includes expected maximum, average,: and
. minimum flowrates. ~ Fig. 3.3-la provides the same for a s one-unit site. Systems described are discussed in detail in Sections 3.4, 3.5,.and 3.6 3.3.1.1 Station Cooling Systems The station cooling systems consist of the circulating water system fer main condenser cooling,.the normal service . water system for various station heat exchangers, and the standby service water system used in the_ event of an accident. or
+ . during abnormal conditions. Condenser cooling water and normal service water for each unit are cooled by four
-mechanical-draft cooling towers.
The standby . service water system operates in conjunction i with the standby cooling tower. and the water storage -
facility of the ultimate heat sink-(UHS).
A circulating water pump discharge flowrate of 511,560 gpm
-- pe r -- unit is required for condenser cooling .and tower 2 blowdown during normal operation. Cooling water is pumped f r~'s (j from the cooling tower flume through the tube side of each_
main condenser and then returned to the main cooling towers.
- To maintain the desired condenser circulating water quality, a constant 2,200 gpm'of water per . unit is discharged as blowdown _to the Mississippi River from'the circulating water system. To replace water losses resulting from _ blowdown, tower dri f t,~ and tower evaporation, makeup water is pumped at an- average rate of 13,870 gpm per unit from the l1 Mississippi- River. -to the cooling : tower basins through a
- waterLtrcatment system consisting'of clarifiers. Sulfuric acid is added to ~the makeup water for pH adjustment, and i- -sodium hypochlorite is applied to the circulating water to ls prevent fouling of heat exchanger surfaces and other piping by aquatic growth.
A sludge dilution tank is provided to receive the clarifier underflow. The sludge is diluted to a solids concentration
-range of 0.5 percent to 4 percent (by weight) using raw river-water at a flowrate of approximately 500 gpm. The
-diluted mixture is then pumped to the Mississippi River.
- Normal station service water is pumped from the cooling tower- flume to the various station service water heat l' Supplement 9 3.3-1 November 1984 n -- ,--. - - ,- ._,,_,.-,,-.___ _ ,,_ _ _._ _ ,,. ,,_._,__ _ , _ , _ _ _ _ _ _ _ , _ , _ _ , , _ _ ,
RBS ER-OLS exchangers and then returned to the cooling towers. Among the heat exchangers are those whose operation is considered essential to remove heat resulting from a loss-of-coolant accident or ensure a safe shutdown during abnormal conditions. The auxiliary building unit coolers, containment unit coolers, standby diesel generator coolers, and main control room air-conditioning water chillers are the essential heat exchangers supplied by the normal service water system. This system also supplies cooling water to four residual heat removal heat exchangers in the event of reactor shutdown. The normal service water system also supplies cooling water to the nonessential heat exchangers, including reactor plant component cooling water (RPCCW) heat exchangers, turbine plant component cooling water (TPCCW) heat exchangers, hydrogen coolers, an alternator cooler, turbine lube oil coolers, electrohydraulic control equipment coolers, air-conditioning water chillers in the turbine and radwaste buildings, and drywell unit coolers.
A normal flowrate of 50,900 gpm per unit is required for service water. An additional flow of 11,600 gpm per unit is required if the residual heat removal heat exchangers are in operation.
The extreme minimum river flow near the site is about 100,000 cfs, and sufficient makeup water is available on a continuous basis for the operation of station cooling systems.
sl The station has a complete standby service water system and
- UHS complex consisting of a mechanical-draft cooling tower, with a 6,500,000 gallon water storage facility. A maximum flow of approximately 35,000 gpm is required to provide adequate cooling for essential equipment. System cooling requirements are reduced to approximately 22,000 gpm after
, the first day of operation, when a large portion of reactor l
residual heat is removed. Standby service water can be supplied to those essential components cooled by the normal service water system and the residual heat removal heat exchangers in the event that the normal service water system 9l or normal cooling towers are inoperative. The standby cooling tower and UHS can also be used to dissipate residual heat produced when a reactor is shut down for refueling and to provide makeup water to the fuel pool.
Interfaces between the normal cooling water supply and the standby service water system allow for automatic isolation of the normal service water system and initiation of standby cooling upon loss of normal cooling. Both service water Supplement 9 3.3-2 November 1984 l
t
RBS ER-OLS
/m
- i systems are.also capable of cooling essential components of
\/ .the reactor auxiliary systems during conditions which cause loss of normal RPCCW function. The normal and standby service water systems are functionally. independent of the circulating water system.
- The water storage facility for the UHS is initially filled. ls with water derived from underground wells. This water 'can provide standby service water system operation for a minimum of 30 days. After this period, makeup water is required at a maximum rate of 214~gpm. Should makeup water from the ls primary wells become unavailable, then water can be brought to the site by truck or rail or pumped from a temporary well which.can be drilled and put into operation within a few
- days. Provisions for blowdown of the standby cooling tower basin into the normal cooling tower blowdown line exist should the need arise. s 3.3.1.2 Station Makeup and Domestic Use Water for station makeup requirements and domestic use is pumped from .two 150 gpm capacity deep wells to a 100,000 gallon well water storage tank and a 5,500 gallon
- hydropneumatic tank, respectively. A third well of a
+ shallow type is used only for supply to the fire protection
("'g water storage tanks when needed, at a rate of 800 gpm. Fire 1
(_,/ protection water can be drawn'from the deep wells in case shallow well water is not available. For normal water usage, the deep well pumps will not operate except to replenish the tanks when needed. During periods of high
- station water demand, the pumps may be operated continuously. Any excess well water will overflow from the well water storage tank to the' storm sewer system. This intermittent discharge to the storm sewer system is the result of constant well pump operation along.with falling I demand from the using systems, and will last .until the demand returns to normal and the pumps are shut off. No recirculation lines back to the deep wells are provided.
Two 150 gpm makeup demineralizer trains treat water from the well water storage tanks for use as makeup water to the plant. Each demineralizer train has sufficient capacity to supply demineralized makeup water for both boiling water reactor units during normal operation. Wastes associated with makeup demineralizer regeneration are conveyed to a waste neutralization tank. Following neutralization, the Supplement 9 3.3-3 November 1984 d
= ,--a ,->-w . -e w --e <-,- ,--~ver, e,,,,,,,,ew-e.p,o m-~.-wn,-e,,,-,,,,m.,,-ww,-p----,m<+- .,--,,g-w--,,-,,u .m---,-p,-wneye ,-w,m- w- r - e -
i RBS ER-OLS l l
waste is pumped to the cooling tower blowdown line at a maximum rate of 400 gpm. Demineralized water flows to the demineralized water storage tanks prior to use in station systems.
Uses of station makeup water include providing makeup water to the main condensate makeup system, ventilation-chilled water compression tanks, rea: tor plant and turbine plant component cooling water systems, and supplying water for I l
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Supplement 1 3.3-3b October 1981 h
I s
RBS ER-OLS sampling panels, sinks and benches, chemical dilution, decontamination areas, auxiliary boiler operation, generator stator cooling, health physics and chemical lab, safety showers, rinse sinks,-and equipment flushing. Potentially 1l radioactive floor and equipment drain water will be collected and processed by the radwaste system.
Nonradioactive drains will discharge to the storm sewer system, unless the presence of oil is possible. The potentially oil-contaminated drainage is first treated by oil-water separator units prior to discharge to the storm sewer system.
Water for tomestic use is supplied from the hydropneumatic 1l tank at approximately 60 psig and in adequate quantity to satisfy the requirements for all plumbing- fixtures.
Domestic water used in the station sanitary systems flows by gravity to a package sewage treatment plant, where the effluent is disinfected with chlorine and discharged to the storm sewer system. Solids produced in the system are periodicallf removed by a licensed waste disposal contractor i for burial in an approved offsite sanitary landfill. These solids will be collected and disposed of separately from all other power plant wastes. Plumbing fixture wastes that could possibly contain chemicals or radioactivity are handled separately by the radioactive liquid waste treatment system. Hot domestic water is supplied to showers, lavatories, and service sinks from electric hot water heaters. Maximum draw on the domestic water system is 9l approximately 195 gpm.
The deep wells will be the only source of domestic water used onsite. The physical arrangement of equipment precludes water in the standby cooling tower water storage facility from flowing to the domestic water system through the pipe which cross connects the two systems. Valving l
I along the pipe and an atmospheric pressure break at the discharge to the UHS will prevent backflow by gravity or l
siphoning and possible contaminaticn of the domestic water.
1 Consumptive use of surface water and groundwater is discussed in Section 5.2.
3.3.2 Water Treatment Treatment of water, including chemicals and inhibitors to be added, and associated wastes for the station cooling systems, makeup water system, and domestic water system is further described in Section 3.6. Chemicals added to the radwaste system are described in Section 3.5. The expected Supplement 9 3.3-4 November 1984 t
i
.s i i
M AX. 30,305 GPM A /G. 27,740 GPM COOLING TOWER MIN. 21.104 GPM MAKEUP MAKEUF j SLUDGE SYSTEM j DILUTION CONST A NT SLUCGE 500 GPM MAX 205 GPMt MAX.705 GPM AVG. 40 GPM t AVG 540 GPM lf 1 rMIN.4 GPM t
- MIN 504 GPM CLARIFIER $LUDGE i DILUTION TANK M A X. 3 5,000 0 AVG. 212 GPM '
AVG. 22,000 G DRIFT AND MIN O GPM EVAPORAflVE LOSSES r"------===-----=
STORM WATER RUNOFF l 4 ': GR ANT 5 BAYOU T 4TrJ ' '
M AX. 214 GPMet E STAND 8Y COOLING MIN O GPM TOWER 5/ WATER &---- m
_ STOR. F AC.
Of. M AX. 300 GPM AVG. 76.8 GPM '
l MAX.195 AVG.17.2 GPMGPM t
W 0 GN l WELL5 DOME 5fic USE i a I i u
. ~ e: I y '
g/) M AX. 300 GPM 1
$ I 100,000 G AL CONSUMPilVk Ci 4/1 "
LOSSES AND DRJ SEWE WELL WATER U l STORAGETANK AVG. 5 GPM 2
I I
M AKEUP WATER I ? TREATMENT u MAX. 300 GPM SYSTEM I AVG. 55.6 GPM '
MIN. 0 GPM
, u l 3 WA5ft l NEUTRAUZATION i I i I MAX.4824 GPM AVG. 4407.6 GPM
[j- 'I BLOWDOWN MIN. 4400 GPM t INTERMifiENT FLOW EXPRE55ED A5 LONilNUOUS FLOW t t AFTER 30 D AYS OF OPER AilON OF ST AND8Y SERVICE WATER SY5 FEM IF REQUIRED
- MONITORED FOR RADIOACTIVITY
" AFTER FIRST D AY OF OPERATION IF REQUIRED
\
Q Aso Avanable On Aperture Card
J 1
d AVG. 22,800 GPM i DRiff AND I EV APOR ATIVE LO55E5 J L M AX. 29.600 GPM AVG. 27,200 GPM 20.600 GPM M AIN H AT 4 CON 51 ANT 4400 GPM SYSTEM 7 J L I
AVG.1,018,720 GPM J k M AIN M CONDEN5ER$ !
u ..
I E55ENilAt HE AT
-----4 EXCHANGERS i
l J k AND RHR HEAT l
EXCHANGERS STORM SEWEP h M AX.125.000 GPM AVG.101,800 GPM NON.E55ENilAL 4 HEAT EXCHANGER 5 MAX. 36.5 GPM AVG.12.2 GPM
- SEW AGE MIN. O GPM 7 TREATMENT l
lf l
>OR Ott REMOVAL NAGE gygpoggggyg SYSTEM STORM SEWER 055E5 NONEAD Olt j (
k J L CONTAM FLOOR A NONR AD FLOOR A EQUIP DR AIN5 EOUIPMENT OR AIN5 gg 3g g,y ,
AVG. 52 GPMt m OGN - RADWA5ff
" STAflON USE R AD FLOOR A " 5YSTEM j
, EQUIP. DR AIN5 --
EVAPOR AtlVE AND M AX. 24 GPM NONR AD MISCELLANEOUS AVG 4 GPM t 1055E5 AVG. 48 GPM t MIN O GPM
" MAX. 25,000 C AL/ DAY AT 400 GPM
- AVG.14.000 GAL /2 7 D AYS AT 400 GPM (3.6 GPM) t MIN. O GPM l
i f i f
( lf 8412060210-4 FIGURE 3.3-1 WATER USE DIAGRAM l
! (COMBINED TWO UNIT OPERATION) i RIVER BEND STATION ENVIRONMENTAL REPORT - OLS SUPPLEMENT 9 NOVEMBER 1984
Il MAX.15,403 GPM AVG.14,120 GPM COOLING TOWER MIN.10,802 GPM MAKEUP MAKEUP r WATER TREATMENT l $LUDGE DILUTION SYSTEM f
CONSTANT SLUDGE MAX. 803 GPM 500 GPM MAX.103 GPM t AVG. 520 GPM 4 g AVG. 20 GPM t 3
BLOWOOWN MIN. 502 GPM Y MIN. 2 GPM t CLARiflER $LUDGE MAX.16,000 GPM AVG. 214 GPM tt DILUTION T ANK AVG.12,250 GPM DRIFT AND MIN. O GPM EVAPORATIVE LOSSES _________ _ __-
$iORM WATER 1i f l RUNOFF I 4 ll GRANT $ BAYOU M 4TrJ ' '
M AX. 214 GPMtt E $iANDBY COOLING MIN. O GPM TOWER $/ WATER W--===9 y MAX. 300 GPM l MAX.195 GPM
_ l AVG. 41.2 GPM i AVG.11.1 GPM t
& MIN. 0 GPM MIN. 0 GPM e
g l WELLS > DOME 51tC U$E -
i3 1 '
!a I U) MAX. 300 GPM y P U) AVG.1.7 GPM t
~
l MIN. 0 GPM 100 000 G AL CONSUPnPilVE FLO@
E $iOR (wE WELL WATER LO$$ES AND DRAINA l $TORAGETANK AVG.$GPMt M4 Ai l M AKEUP WATER MI l 7 TREATMENT -
M AX. 300 GPM SYSTEM AVG. 28.4 GPM t MIN. O GPM 1 P 1
WA$if ~
I NEUIRAUZATION l
i MAX. 2612 GPM AVG. 2203.9 GPM 1 f MIN. 2200 GPM
{ , BLOWDOWN t INTERMITTENT FLCW EXPRE$$ED AS CONilNUOU$ FLOW t t AFTER 30 DAY $ OF OPERAflON OF STAND 8Y $ERVICE WATER SYSTEM IF REOulRED
- MONITORED FOR R ADIOACTIVITY
- AFTER FIRST DAY OF OPERATION IF REQUIRED l .aso Available Om
/ Aperture Card
y-m
- 1, i AVO.11.400 GPM l DNFT AND EVAPORATIVE LOSSES f
J k MAX.14000 GPM AVG.13,600 GPM MIN.10,300 GPM M AIN HEAT 4 ,k CONSTANT 2200 GPM 7 DIS 5IPATION m
$YSTEM -
4 k 4
AVG. 509,360 GPM J k M AIN "
CONDENSERS
_____________ _ _ _ _ _ s& isycna'Jg;'J L a
N AND RHR HEAT EXCH ANGER S J h STORM SEWER & MAX 62,500 GPM AVG. 50,900 GPM NON.E55ENil Al.
4 HEAT =
EXCHANGERS M AX. 30. 4 GPM AWG.6.1GPM m SEW AGE m r TREATMENT r 4%
l f t
Olt REMOVAL m r
GE SYSTEM STORM SEWER EV APOR ATIV E NONR AD Olt j( CONTAM FLOOR &j ( NONR AD FLOOR & jg EOUIP DR AINS EQUfPMENT DR AINS LX. 300 CPJ .
G. 26.5 CPU j m M.QGPM ' RADWA5TE
" STATION USE R AD FLOOR & SYSTEM r
EOUIP. DR AINS EVAPORADVE AND M AX.12 GPM NONRAD MISCELLANE0US AVG. 2 GPM t LOSSES AVG. 24.5 GPM i MIN. O GPM
~
- CAX. 25,000 G AL/ DAY AT 400 GPM AVO.14,000 GAL /3.1 DAYS AT 400 GPM (1.9 GPM) t MIN. O GPM 1 r 1 r 'r FIGURE 3.3-1a WATER USE DIAGRAM (SINGLE UNIT OPERATION) ,
RIVER BEND STATION l ENVIRONMENTAL REPORT- OLS SUPPLEMENT 9 NOVEMBER 1984 8412060210-01
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Supplement 1 3.6-3b october 1981 e-,, ,,-- - - -w w wm e -r--ww-mm p w,v ,_www
r-RBS ER-OLS 3.6.1.3 Circulating Water Systems )
3.6.1.3.1 Cooling Tower Blowdown Eight mechanical-draft cooling towers, described in Section 3.4, cool the condenser coo.t.ing water and the normal sl service water from Units 1 and 2. Makeup to the main cooling towers is required to replace evaporation, drift, and blowdown losses from the towers. Makeup water is sur'1.ied from the Mississippi River and is treated for suspended solids removal, as previously discussed.
Evaporation of water is the main heat transfer mechanism and results in an increase in concentration of solids in the circulating water. A quantity of water is blown down from the circulating water system to control the dissolved-solids level in the circulating water and serves as a means of conveyance for other station wastes to the Mississippi River.
, Makeup water is supplied to the tower flume at a rate ranging from 10,300 to 14,800 gpm/ unit. Main cooling tower blowdown diverges downsteam of the circulsting water pumps and upstream of the point of chlorination sl (Section 3.6.1.3.2). The main cooling tower blowdown is maintained at a constant rate of 2,200 gpm per unit. The resulting concentration factor varies from 4.7 to 6.7, with an average value of 6.2. Tables 3.6-2 and 3.6-3 present the 9l expected chemical composition of main cooling tower blowdown. The NPDES permit fixes limitations for three of sl the constituents listed for the main cooling tower blowdown.
Specifically, the pH shall fall within a range of 6 to 9, and the daily average and maximum concentrations 1 respectively shall be 0.2 mg/l and 0.5 mg/l for free available chlorine, and 10 mg/l and 15 mg/l for oil and grease. The expected composition of the blowdown will not exceed the NPDES limitations. Chemical concentrations in the intake water and the blowdown would normally peak in the late summer and early fall months and be at the lowest level during the winter and early spring. The effects of liquid 1
chemical and biocide discharges on water quality and aquatic life are discussed in Section 5.5.1.
In addition to the main cooling towers, the River Bend Station has one standby cooling tower and water storage facility of the ultimate heat sink (UHS) complex (described in Section 3.4) with well water as the makeup water source.
$l Blowdown from this tower, if needed, will flow into the main cooling tower blowdown pipeline.
Supplement 9 3.6-4 November 1984
RBS ER-OLS
[
-3.6.1.3.2 Biofouling Control Chlorination- facilities are provided for biofouling control in the condenser cooling water and service water systems.
Chlorine . will be either generated onsite by a' sodium hypochlorite generating facility or purchased as commercial- ,
grade sodium hypochlorite solution, delivered to the plant by truck. The onsite generating facility includes a salt storage and dissolving system, electrolytic cell, hypochlorite solution tank, pumps, controls, and residual chlorine analyzers. Purchased hypochlorite will be loaded directly into the hypochlorite solution tank and diluted to ,
a concentration suitable for controlled injection into the circulating and service water systems. The frequency and duration of chlorination of condenser cooling water for each lS O
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1 Supplement 9 3.6-4a November 1984
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Supplement 1 3.6-4b october 1981
RES ER-OLS y
unit is controlled by means of preset timers, and the
~
J'- the chlorination schedule will depend on degree of biofouling control required. The service water system will be chlorinated continuously to a level that will result in a total 1 residual chlorine concentration of 0.6-0.8 ppm at the discharge from the system.
The condenser cooling water will be chlorinated up to 60 min / day to a maximum level of 5 ppm at the point of 9 application. Based on a total condenser circulating flow of 509,360 gym per unit, the resulting daily hypochlorite consumption would be approximately 1,273 lb per unit, maximum. Additional daily consumption of the chemical as a result of continuous chlorination of the service water system is not expected to exceed 1,985 lb/ day. I Residual chlorine is monitored at the discharge from the condensers,.the service water system, and at the cooling l8 tower blowdown. The chlorination cycle is controlled to prevent discharge of either free available chlorine or total ,
residual chlorine from exceeding the limitations of current federal new-source affluent standards for the steam electric power generating point source category. Average and maximum free available chlorine will not exceed 0.2 mg/l and 0.5 mg/1, respectively, and discharge duration of either free available or total residual chlorine will not exceed 2 O hr in any 1 day. Also, only one unit will discharge at any given time.
3.6.1.3.3 Corrosion Control The River Bend Station design does not require the use of corrosion inhibitors in any closed loop fluid system.
Sodium nitrite is used to inhibit corrosion in the diesel generator cooling jackets. Adequate corrosion allowance in metallic surfaces of all other systems and equipment has been made. Corrosion rates are controlled- where necessary by use of noble metals, protective coatings, inert gas blanketing, or other established techniques.
Corrosion and erosion of the tubes in the main condensers will result in an increase in the concentration of copper, i zinc, nickel, and tin in the cooling tower blowdown above l
the level naturally occurring in the circulating water. The effect on the blowdown at an equilibrium condition is shown in Table 3.6-3. The normal rate of metal loss, approximated 2 at O.4 mils per year, occurs after the first 1 to 3 months of operation, when a protective film is formed inside the tubes. The maximum rate of metal to solution is estimated 12 Supplement 9 3.6-5 November 1984
(}
RBS tR-OLS 2 l to be 1.2 mils per year and occurs at startup and gradually diminishes to the normal rate as the protective film becomes fully developed. Tube cleaning or mechanical scraping would remove all or most of the protective film and return the corrosion rate to the maximum O
Supplement 9 3.6-Sa November 1984 O
+
i RBS ER-OLS.
A'~ n station- emission of dissolved solids is-estimated.to be approximately 68 tons.-
3.6.2 Sanitary System Wastes Water for domestic use is taken from wells on the site and treated and chlorinated, as 'necessary,-. to meet the requirements of the state of Louisiana pertaining to potable water as discussed in Section 3.3.
The' waste from all-sanitary fixtures in the power station is conveyed to either of two package sewage treatment plants.
One treatment plant is designed to handle 7,000-gpd of sanitary waste, and the second treatment plant is designed to handle 15,000 gpd, for a total treatment plant capacity of 22,000 gpd. This will treat the waste generated from the estimated 500 employees required for. operation of both power l' plants with reserve capacity for unexpected demand. Annual refueling and overhauling operations, performed separately for each power plant,. require a significantly greater number of personnel (approximately 1000) for a period of approximately 1 month for each unit. A third treatment 8 plant sized to handle 25,000 gpd will be brought on line to augment the treatment plant capacity as required.
Sewage treatment is by the extended ~ aeration modification of-
[)
's - the activated sludge process, followed by disinfection by chlorination. Specifically, sewage . passes through a comminutor and is mixed with return sludge prior to entering an aeration compartment. The resultant mixed liquor is aerated for a sufficient length of time to permit biological aerobic oxidation of organic matter in the waste. Following aeration, the mixed liquor enters the sedimentation tank, where activated sludge settles out and is returned to the aeration compartment or diverted to the sludge holding tank.
Excess sludge produced in the system is periodically removed
- by a licensed waste disposal contractor.
i Effluent from the treatment plant is chlorinated and discharged to the storm sewer system at an average rate of 12.2 gpm and a ma::imum rate of 36.5 gpm. The treatment l' plant provides, as a minimum, the level of treatment and effluent quality required by federal standards for secondary treatment contained in 40CFR133, and operates in accordance i with the requirements of the State of Louisiana Board of
, . Health. Expected performance of the treatment plant is as follows:
BOD (5-day) Reduction and 90 percent Suspended Solids Removal
() Supplement 9 3.6-7 November 1984 1
i
RBS ER-OLS Effluent Settleable Solids <0.1 mg/l Free Chlorine Residual 1 ppm Effluent pH 6.0 to 9.0 Effluent BOD (5-day) and <30 mg/l Suspended Solids 3.6.3 Other Wastes 3.6.3.1 Auxiliary Boiler An auxiliary electric boiler, having no direct exhaust emissions, is provided at the station. The boiler is designed to produce 40,000 lb/hr of steam, which is used for turbine gland seal steam during plant startup, for reheater tube blanketing, and for radwaste process steam requirements during the refueling and overhauling shutdown of each unit.
In addition, the auxiliary boiler system is a backup steam source for main turbine steam sealing. Under normal system operation, the auxiliary boiler is not in service. During annual refueling and overhauling shutdowns, the boiler is expected to operate for a minimum period of 6 weeks per year for each unit and an average period of 8 weeks per unit. A schematic diagram of the auxiliary boiler system is shown in Fig. 3.6-4.
Feedwater and makeup for the electric boiler is drawn from the auxiliary condensate system. A chemical feed system is used to monitor and control electrolyte conductivity between
, 2,400 and 2,800 micromhos, pH within a range of 8.5 to 10.5, and dissolved oxygen. Sodium sulfate, sodium hydroxide, and sodium sulfite are used for these purposes, respectively.
Each chemical is stored in individual day tanks and provided with separate control devices and chemical feed pumps.
Auxiliary boiler blowdown is required when the electrolytic
, conductivity exceeds 2,800 micromhos or when pH is greater than 10.5. The maximum blowdown rate ir approximately 0.25 percent of the 100 percent load steam rate or approximately 0.2 gpm/ boiler. The expected chemical and physical characteristics are presented in Taole 3.6-4.
Boiler blowdown is conveyed to the acid and caustic waste sump (Fig. 3.6-2) for pH adjustment and mixed with cooling tower blowdown prior to discharge to the Mississippi River.
The addition of the auxiliary boiler blowdown will not appreciably affect the composition of the cooling tower blowdown.
Supplement 9 3.6-8 November 1984
A RBS ER-OLS l
TABLE 3.6-4 l ('
EXPECTED CHEMICAL COMPOSITION OF AUXILIARY BOILER BLOWDOWN l i
i Constituent Concentration lb/ year 818 Sodium (Na) 496 ppm 145
- Sulfate (SO4)- 1,034 ppm 302 ,
Total Dissolved Solids (TDS) 1,530 ppm 447 pH (range) 8.5-10.5 -
l j.
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f P
i-i l
81' Based on 4 months operation / year.
1 Supplement 9 1 of 1 November 1984 0
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--- .. - ,,__a a.A. .
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-RBS ER-OLS: '
l9 q<
E storms.. Creek--flow'is~directedLinto the lined. channel by a '
d idrop' structure .: -Channel slopeais approximately 0.002)ft/ft ~'
>- - ;(01.2 percent)'. -The' channel cross -section is-trapezoidal g- with-ai10-ft: depth,:bottomLwidthiof 50:ft, Land 3H-: 11V: side:
- slopes._ The ' interface of the downstream end of the lined- -
- ichannel'and.the_ existing stream bed is protected by . riprap
~
, 'to minimize channeltundercutting.
!' Plant' construction -has: resulted in the-removal of allibut:
- ?about 750'ft of East Creek, a small debris-clogged . drainage course
- formerly about 3,500 ftt long. An: additional 1,150 ft' j.'- Lof-unlined _ channel, which drains-to_ East Creek; will. convey
. sewage 1 treatment plant effluent (less than 1 cfs) and storm water runoff to Grants Bayou.
I-
- North-IAccess Road, ~ constructed to permit plant access to i rState Highway 9651and US. Highway 61, passes over West Creek about 1,500.ft upstream of the~ drop structure and over West
[, : Fork Grants Bayou about 2,000 ft upstream of.the plant area. +
The bridges 'at these points have no_significant effect on 1 L water levels at either_ stream due to bridge size and height
[ aboveLnormal and. flood ~1e'rels.
I; Prior to construction, 24_ ponds existed within the site :
- property -boundary with. a- total surface area of- about, I
,28.6 acres. . Five ponds were removed during. construction .i having a combined total' surface area lo f . about 1.7 acres.
l_ -Fig. 4.2-1. shows the location of ponds- within the' site l e property boundary. '
y 4 To offset the removal of these ponds, one pond, called the Wildlife Management Lake, will be constructed at the River ;
Bend ~s ite . - Normal water surface elevation will.be about j
( 50 ft mal, and will be- controlled by two arch culverts lS
[ located at .the tramway bordering. Alligator Bayou.
water level, the surface area is'about- 34.2 acres, storage At this ;
p -
is about 196 acre-ft, and the' average depth is slightly less The embankment at the break in the old tramway P
-than 6 ft. ,
4- will be constructed ~from'onsite construction spoil material. j
' Access to the lake will be constructed from ' River Access Road. The final plans.for future use of the lake are being .,
-investigated. ,; .
A variety of erosion. control measures have been implemented ,
at the site.during plant construction, including the- stock- t piling and use of topsoil, seeding, mulching,' drainage channels, and energy dissipators. Site soils are highly l erodible. Sediment deposition due to runoff from the primary spoil pile has occurred in the Wildlife Management .
Lake and in a small portion of the floodplain near the r Supplement 9 4.2-3 November 1984
)
1
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r 1
RBS ER-OLS tramway entrance to the lake. Sediment deposition due to runoff from plant construction areas has also occurred in h portions of East Creek and West Creek. The drainage and water quality characteristics of these streams have not been significantly altered. Mitigative action taken to minimize erosion is discussed in Section 4.6.
During the final phase of plant construction and the initial phase of operation, all areas cleared for construction or used as stockpile and equipment laydown areas will be replanted with vegetative cover to minimize erosion.
Vegetative cover will also be used to restore and stabilize any areas affected by erosion and deposition of eroded sediments. This will involve the use of grass seed, lime and fertilizer, mulch, binding or mulch anchoring, topsoil, 1
fill, sod, flumes, drainage ditches, and/or energy dissipators, and other appropriate measures as necessary.
All seed will comply with guidelines published in the Louisiana Standard Specifications for Roads and Bridges'18 Onsite erosion will be monitored and controlled as described 1
laboveandinSection4.6.
Sediment production (erosion) and deposition caused by construction of the plant, the intake and outfall structures, the barge slip, or River Access Road are not expected to have any residual adverse impact upon plant operation, since these and adjoining areas will be restored to minimize erosion and subsequent deposition. Periodic 1 dredging in the embayment area will be necessary and will result in a temporary increase in suspended solids in the intake water which will be removed by the clarification system (Section 3.6.1.2).
Improvements to the riverbank bordering the River Bend site are planned by the U.S. Army Corps of Engineers to begin in 8
the fall of 1984 and be completed in early 1985 (Section 4.6.2). No significant adverse operational impact Conversely, is expected to result from these activities.
the revetments will have a beneficial effect through stabilization of the riverbank. The erosion protection provided in the design and construction of the embayment area was engineered to take into account U.S. Army Corps of Engineers plans and methods for revetment in order to ensure 3
continuity at the connecting points. Since it was not a factor in the functional design of the embayment area, revetment construction is not expected to impact plant operation should the improvements be delayed until after plant operation begins.
Supplement 3 4.2-4 April 1982
RBS ER-CIS than steep slopes and cultipacking. in areas running
.[\ /) perpendicular to the slope. In crder to further reduce the extent of erosicn, other control reasures are being assessed for future use.
River bank erosion at the embayment area has teen controlled t.y gentle sloping and by employing riprap.
Prior to plant operation the Army Corps of Engineers plans to construct a revetsent compcsed of an articulated concrete mattress for stabilization of the east bank of the Mississippi River. The revetrent will be tied into the erbayment slope . protection and will extend upstream and downstrear for several riles.
Upon cospletion of Unit 1 construction, exposed tracts of land will be seeded to promote vegetaticn where practical.
At- the conclusicn of Unit 2 ccnstruction activities, the construction-related facilities utilized by both units and any additicnal facilities or laydown areas required during Unit 2 ccnstructicn will be removed. The land will then undergo final grading, seeding and J andscaping. Grass cover also will be utilized to restcre and stabilize areas affected by erosion and arear affected by deposition of eroded sediments.
-4.6.3 Cust Dust contrcl is acccmplished by paving or applying asphalt binders to the construction roads and by water sprinkling.
No sprays were required tc prevent dust blowing from the coarse fill stcckpile.
4.6.4 Traffic Ccastruction of the North Access Road ccnnecting US Highway 61 and State Highway 965 has minimized both congestion and noise en State Highway 965. Truck traffic on US Highway 61 was reduced by transporting coarse fill over an extended period and stockpiling.
Rush hour traffic generated by the constructicn work force congests US Highway 61 where it intersects North Access Foad and State Highway 965, and the St. Francisville-New Road ferry crossing. These snarls are short-term and local residento have acclimated to the rush hcurs, generally avoiding travel at these times. A traffic light placed at the intersection of North Access Road and US Highway 61 has assisted in alleviating traffic ccngestion.
() 4.6-3
RBS ER-OLS 4.6.5 Effluents and Wastes h Construction activities result in temporary discharges into site water bodies and the Mississippi River. Effluents and wastes discharged into local streams comply with limits established in the National Pollutant Discharge Elimination System (NPDES) permit, thus minimizing impact to the receiving body.
Effluent from the sewage treatment plant empties into East 6l Creek near Grants Bayou . The low level of residual chlorine in the effluent stream is reduced by the time the effluent reaches East Creek; therefore, chlorine has no effect at the point of release into East Creek. Sanitary wastes from the chemical toilets are transported to an offsite disposal facility. Effluent from the toilet facility at the switchyard is treated in a septic tank and transmitted to the soil through approved filter fields in the switchyard.
In order to comply with NPDES discharge criteria, waste water from the concrete batch plant is treated for suspended solids and high pH prior to its release into Upper West Creek.
Prior to plant operation, plant water conveyance and storage systems will be flushed. The final discharge will be in compliance with the limitations established by the EPA and the State of Louisiana.
River Bend Station will generate approximately 252,000 cu yd of construction wastes, 75 percent combustible and s lsl 25 percent noncombustible. Combustible wastes (paper, cardboard cartons and wood boxes) are burned onsite and the resulting ashes together with noncombustible wastes (metals, concrete, fire retardant materials and roofing insulation) unsuitable for salvage are buried in a landfill.
The incinerator consists of an above ground burn pit and an air curtain destructor. The air curtain destructor swirls a curtain of air into the pit increasing the burning rate 3 to 4 times that of open burning. The air curtain also tends to trap the resulting smoke until it is consumed by the intense
, heat. A permit to operate the incinerator was obtained from the Louisiana Air Quality Control Division.
i Supplement 9 4.6-4 November 1984 ,
1 i
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, - RBS ER-OLS .1
- water supply.. The maximum' individual was assumed-to consume
- - d~ < fish :and . invertebrates caught .at the edge of the initial (mixing zone. .This location was also used-in calculating _the
' dose from swimming.- , Boating was assumed to occur- in 'the' .
outfall-: area. Shoreline: recreation was analyzed at the closest" shore of.the Mississippi River.
i p ?5.4.4.1.1 . Liquid Pathways' -
- 'The calculated maximum' organ dose to
- the maximum individual L :from liquid pathways was 0.8 mrem /yr to a child's' thyroid. .'
- This
- dose was primarily a. result of the censumption of fish.
' It is assumed that the child consumes 6.9 . )qi of fish-- per
- year which- was caught' at the edge of the initial mixing zone.
e Thel-maximum- annual dose resulting from the consumption of duck obtained from the edge of the initial mixing zone was
- 0.0017 mrem to the adult bone.
F .
< 5.4.4.1.2' Radioiodine and Particulate Pathways. ,
3 For- the gaseous releases, a separate analysis was perforued ;
, .for each location of the maximum residence, milk' cow, and '
- i. beef animal. Each location was analyzed for submersion,
[O l \m ,/
inhalation, ground deposition, and ingestion of vegetation.
late consumption of deer and ' grey squirrel was also-
- considered.
i
[
~
The calculated dose to the maximum individual from gaseous-
} pathways was 9.2 mrem /yr to an' infant's thyroid. It l9 4
represents ~ a hypothetical infant who lived at the residence corresponding to the maximum cow location 1.3 km l north-northwest. A majority of this dose is due to the
? consumption of cow milk. The thyroid dose-from tJte grount
- deposition is conservatively assumed to be equivalent to the
[ calculated total body dose as directed by' Regulatory Guide 1.109. ,f 5.4.1.1.3 Immersion Doses from Noble Cases i:
L The doses from immersion in noble gas effluents are t
presented in Table 5.4-10.
t
!' 5.4.4.2 Population Dose '
t The calculated annual doses for the population residing lt i within a 50-mi radius of the site are presented in l r Table 5.4-22. For the liquid effluents, the calculated !
I whole body and thyroid doses are 0.44 and 0.068 manrem per l4 ;
i
() Supplement 9 5.4-11 November 1984 i,
e- , v n .v .. ww w ,- - v m-m v-r- -,em- ~ ~ ~ ,, -- .----~~w~v---,-"
RBS ER-OLS year, respectively. The calculated doses from gaseous pathways are 1.8 manrem/yr whole body and 4.1 manrem/yr 4l thyroid. These doses were calculated for a projected
! population in the year 2010 of 1,163,282 people within 50 mi 4 of the site. The milk, meat, and vegetation 50-mi radius crop yield, as well as the 50-mi radius sport fish harvest, are presented in Appendix 5A.
Annual population doses to the contiguous U.S. from liquid and gaceous pathways are given in Table 5.4-22. The calculated doses to the U.S. population are 45 manrem to the
=l whole body and 48 manrem to the thyroid.
5.4.5 Impacts to Biota Other than Man The exposure pathways and the concentrations of radionuclides in the environment are discussed in previous sections. The doses to terrestrial and aquatic organisms other than man resulting from these radionuclides are presented in the following sections and tables. Calculated internal and external dose rates to biota are based on the model and assumptions presented in Appendix SA.
5.4.5.1 Doses through Gaseous Pathways Tables 5.4-23 and 5.4-24 present the calculated external and internal doses, respectively, to biota other than man from gaseous pathways. These doses are calculated for a terrestrial animal residing at the restricted area boundary.
The external dose rates for terrestrial animals are based on methodology used to calculate external dose rates for man.
5.4.5.2 Doses through Liquid Pathways Table 5.4-23 shows the maximum calculated external doses from submersion in water at the edge of the initial mixing zone and exposure to sediments at the closest accessible shoreline from the point of discharge. Table 5.4-24 shows the maximum calculated internal doses due to the bicaccumulation process.
5.4.5.3 Direct Radiation Doses The station is designed so that neither solid nor liquid radioactive wastes are stored outside shielded buildings, thus limiting the maximum dose rate to 1 mrad /yr. The dose rates to biota other than man are expressed in units of millirads per year rather than lirems per year, since millirem is the unit used specifically to express the effect radiation on human tissue. This external exposure rate is independent of the biotic type and assumed to be the same for biota as for man.
Supplement 4 5.4-12 February 1983
t
'RBS ER-OLS
=
l L 3 ,/- TABLE'5.4 COMPARISON OF MAXIMUM INDIVIDUAL DOSE COMMITMENTS WITH APPENDIX I TO 10CFR50 Calculated Dose Single Unit RM-50-2 2 !'
Dose Criterion Operation Design Objectives
. Noble G'as Releases Beta dose in air 2.7 .0 mrad /yr 2
Gamma dose'in air 2.7 10 mrad /yr 9 Total-body immersion dose 1.6 5 mrem /yr Skin immersion dose 3.9 15 mrem /yr Liquid Releases 818 Total-body dose 0.02 5 mrem /yr Organ dose 0.8 5 mrem /yr Iodines and Particulate Releases'2'
() Organ dose 9.2 15 mrem /yr le 81'The radiological doses presented in this section for the-
. liquid pathways are for two-unit operation (blowdown
- flow = 4,400 gpm). For single unit operation'(blowdown flow = 2,200 cnxn), the discharge velocity would be half the two-unit value~(2.1 fps) due to'the reduced flow through the outfall pipe. The concentration of radionuclides in the blowdown ~is identical for one- and two-unit operation. The quantity of radionuclidos released to the river for one-unit
~
operation would be half the two-unit value. At the downstream location of the nearest domestic water intake, the radionuclide release is' dispersed throughout the river cross section at approximately equal concentration. River flow is the main factor causing dilution at this point, and the radionuclide concentrations for single unit operation would be about half the two-unit values. At the edge of the mixing zone, dilution is affected by both river flow and discharge characteristics.
The one-unit concentrations at the edge of the mixing zone will be approximately equal to the two-unit values.
'2' Carbon-14 and tritium have been added to this category.
Supplement 9 1 of 1 November 1984
- O
s ~ . . .
. .s BBS EB-OLS
-TABLE 5.4-15 ANNUAL DOSES TO NAII5UR INDITIDUAL IN THE ADULT GPOUP(1)
FROM GASEOUS RADIOIODINE RWD PARTICUL ATE EFFLUENTS ARR 952_ LEER ParavaY Total Bg{I 1hig gggg vei thJrg {
EZERill[gej gi h qhtgggt_ '
Costaminated ground 1.6-02 1.9-02 1.6-02 1.6-02 1.6-02 1.6-02 1.6-02 1.6-02 Ichalation 1.6-03 0.0 3.3-03 1.9-03 7.8-02 2.2-03 2.6-03 2.0-03 Fresh vegetation 5.2-03 0.0 2.2-02 5.8-03 1.6-01 5.6-03 4.3-03 5.3-03 Stcred vegetation 3.0-02 0.0 1.3-01 3.2-02 3.1-02 2.8-02 2.6-02 2.8-02 ,
Cow silk (*) h2 ,92 0. 0 .. . 1.5-01 },,2-22 h2122 h2-22 2.9-02 3.3-02 9 TOTAL DOSE 9.6-02 1.9-02 3.2-01 1.1-01 1.S+00 9.4-02 7.8-02 8.4-02 i
NOTE: 1.6-3 2 = 1. 6 x 10-2 c m 3 At residence 2,000 a northwest ca) At 1,300 m north-northwest Supplesent 9 1 of 1 November 1984
'N Q J %J RBS ER-OLS.
4-TA BLE 5. 4- 16 ANNUAL DOSES TO 5AII508 INDIVIDU AL IN THE TEEN GROUP (13 -
j FROM GASEOUS R ADICIODINE AND PARTICUL ATE EFFLUENTS
.ARR3al_E2se (grger PathuRI
~
T tal Body glig B2RS M'SE -IEIrgi{/ggitt Eidngy LuRS GI-TEAct Centaminated ground 1.6-02 1.9-02 1.G-02 1.6-02 1.6-02 1.6-02 1.6- 02 1,6-02 Inhalation 1.9-03 0.0 4.7-03 2.4-03 1.0-01 2.7-03 3. 5-03 2.3-03 Fresh vegetation 4.5-03 0.0 2.0-02 5.3-03 1.3-01 3.6-02 4.0-03 4.6-03 Stored vegetation 4.8-02 0.0 2.2-01 5.4-02 5.2-02' 2.3-01 4.5-02 4.6-02 i'
Cow allk(2) isf-22 0.0 2.7-01 9.3-02 122192 IsI-92 5.3-02 5.6-02 9
TOTAL DOSE 1.4-01 1.9-02 5.3-01 1.7-01 2.2+00 3.6-01 1.2-01 1.2-01 2-i J
I I
i l
1 i
i
, NOTE: 1.6-02 = 1.6 x 10-a i
j (13 At residence 2,000 a northwest 4 c a) At 1,300 m north-northwest i
Supplement 9 1 of 1 November 1984 1
- r
[ )
N (.) (I RBS EE-OLS 4
TABLE 5.4-17 ANNUAL DOSES TO HAIIMUM INDIVIDUAL IN THE CHILD GROUP (1)
FROM GASEOUS BADIOIODINE AND PARTICULATE EFFLUENTS Annual _pagg_InEREZIsinnitt __
EalhYRI Total BogI gig B2ne dver ThII2_id
_ kin _*_I : M 21-IEREL i contaminated ground 1.6-02 1.9-02 1.6-02 1.6-02 1.6-02 1.6-02 1.6-02 1.6-02
- Inhalation 2.1-03 0.0 6.4-03 2.6-03 1.3-01 2.9-03 3.4-03 2.1-03
! Fresh vegetation 7.7-03 0.0 3.7-02 8.9-03 2.0-01 8.7-03 7.2 7.5-03 Stored vegetation 1.1-01 0.0 5.5-01 1.2-01 1.2-01 1.1-01 1.1-01 1.1-01 Con milkC2) 1.4-01 1s0 6 d-21 -1.9-01 2 8+00- 1s6-21 1.3-01 1.3-21 9
TOTAL DOSE 2.8-01 1.9-02 1.3*00 3.4-01 4.3+00 3.0-01 2.7-01 2.7-01 i
l i
1 I
I i
k 1
a n
NOTE: 1.6-02 = 1.6 x 10-2
] (13 At residence 2,000 m northwest l (2) At 1,300 m north-northwest i'
Supplement 9 1 of 1 November 1984
_ _ _ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ = _ _ _ _ _ _ _ _ _ . - _ , _ _ . . _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - _ _ . . . .. _ , .
v i
RBS ER-OLS TABLE 5. 4-18
' ANNUAL DOSES TO M AIIMUM 'IMDITIDU AL IN THE INFANT GROUPC E)
. FROM GASEOUS RADIOIODINE AND P ARTICUL ATE EFFLUENTS i
- AnnunL_Dggg_IntralIIZuniti __ _,
! Enthmax - Intal andI Ehin- Renn LhsE I_bI ggid (((ggy Lggg. ci-Igggt Contaminated ground 1.6-02 1.9-02 1.6-02 1.6-02 1.6-02 1.6-02
-1.6-02 1.6-02 J Inhalation 1.5-03 0.0 4.7-03 1.9-03 '1.2-01 2.0-03 2.5-03 1.4-03
! Ccv milk (2) 2.8-01 0.0 .1,,3 +gg 3.9-01 9.1+00 },,2 ,01
_ M2 2.7-01 J
9 TOTAL DOSE 3.0-01 1.9-02 1.3+00 4.1-01 9. 2 +0 0 3.4-01 2.8-01 2.9-01 t
I i
i
}
i l
i i
i i
i i
i NOTE: 1.6-02 = 1.6 x 10-a
( t ) At residence 2,000 m northwest
(*)At 1,300 m north-northwest l
Supplement 9 1 of 1 November 1984
! l
m Q' . .f V \
BBS ER-OLS TABLE 5.4-19 ANNU AL DOSES TO RAIIRON INDIVIDUALS FROM CONSUNPTION OF COS MILK * -
ABREAl Dose foregf2 Egg 11[ _
E31AXAI.Asa Best LlIn Intal no4I Th2Esil naansI inna- EL:IIaH -
Adult. 1.7-01 6.2-02 5.1-02 1.4+00 5.0-02 3.4-02 3.9- 02 '
Teen 3.2-01 1.1-01 8.1-02 2.3+00 9.1-02' 6.3-02 6.7- 02 9
Child 7.7-01 2.3-01 1.7-01 4.6+00 1.9-01 1.5-01 '1.5-01 Infant 1.5+00 4.7-01 3.3-01 1.1+01 3.8-01 3.1-01 '3. 2- 01 NOTE: 1.7-01 = 1.7 x 10-1
- The estimatei doses presented in this table are based upon consumption of cow milk. from a hypothetical cow grazing at the site boundary in the north-northwest direction.
Supplement 9 1.of 1 November 1984'
D -RBS ER-OLS would' bhigh e (greater than_O.44'm/sec-1.4 ft/sec), so that- '
1 p)-
A therefis little likelihood that fish would. remain within the
. areas' of harmfully . elevated copper. concentrations .for extended'pariods of time. - There is -the possibility. dhat
-some.. fish,- drifting- planktonic -organisms, -and benthic
.invertebratest.would im affected by exposure. . 'However, because of the temporary nature :of the: elevated copper
- discharge, the reduced ~ amount- of . ionic. copper, and its
~11mited' spatial extent, there- is little likelihood for a "
measurable impact to.the biota of the Mississippi River in
, the vicinity of the River Bend site. .
- Sodium: hypochlorite is added to the condenser cooling and 4
service water systems for bicfouling control. Discharge of total residual chlorine will not exceed 2 hr per day, and levels at'the point of discharge will not exceed 0.2 mg/l mean, and 0.5 mg/l maximum of free available residual
-chlorine. Further dilution will occur in the discharge ~
Jplume. No-~effect_ of chlorination on aquatic organisms in the river is expected.
a Also discharged to the river via a_ separate pipe is the clarifier sludge from the makeup water treatment system.
.This discharge stream contains suspended solids (principally clay, si lt ,- and sand) which were removed from the river, and-small amounts of. a cationic polymer used in the flocculation / coagulation process. This cationic. polymer-
. ('}
, V. will be: neutralized in the form of a floc, which would not t have-any biological effect. The sludge will be diluted to a 1 percent concentration (average) with raw river water, and p discharged. The discharge of- this low concentration of river-originated suspended solids- to the swiftly flowing river, which contains a high suspended sediment load, has
- little potential for' biological effect.
- Spoil from periodic maintenance dredging of the embayment e will be discharged to the river. The frequency of this l . operation and the volume of material released has not been ,
l determined, but the amounts will be considerably less than L that released during construction of the embayment l_ :(Section 4.3.2.1). There was no apparent buildup of-l sediment in the river during construction, and organisms in i the river are adapted to conditions of high suspended
- i. sediment load. -Therefore, this effluent is expected to have l no effect on the river biott.
1:
Several small volume effluents will be discharged to Grants
- Bayou by way of East and West Creeks, through the storm drainage system. These include nonradioactive floor and equipment drainage, excess well water, storm water runoff, and treated sanitary system wastes (Section 3.6). All
[-
() Supplement 9 5.5-5 November 1984 o - -...-.- . -...,. - - . _ _ _ _ _ _ _ . . . . . _ , . _ _ - - _ , - - .
r 1 l
RBS ER-OLS drainage that can potentially contain oil or other chemicals ll will receive treatment, as necessary, prior to discharge.
The sewage treatment effluent will be treated to at least secondary treatment standards. This stream, containing nutrients and low levels of chlorine (s1 mg/1), will be ,
somewhat diluted by the time the effluent reaches Grants )
Bayou. Since Grants Bayou flows intermittently, the sewage j effluent at times will constitute the entire flow of the I bayou. While this will alter the habitat of the bayou, !
2 creating a non-intermittent stream with relatively high nutrients, the effect would be limited to this area of the ;
bayou. Effects on Alligator Bayou and Thompson Creek would i be unlikely, because of dilution of the effluents by these I larger streams.
In summary, effluents containing chemicals and biocides discharged during operation of River Bend Station are l expected to have little impact on aquatic life in the Alligator Bayou, Thompson Creek, or the Mississippi River or j Grants Bayou.
-5.5.2 Effect of Operating Auxiliary Equipment A description of auxiliary boiler operation is presented in Section 3.6. The potential impact of auxiliary boiler blowdown to the Mississippi River, an discussed in Section 3.6, is negligible.
The emergency generator diesels, the high pressure core spray generator diesel, and the diesel fire pumps will be water-cooled and will burn No. 2 distillate fuel oil. Since normal operation of the diesels will be limited to short duration, as described in Section 3.6, the discharge of combustion products to the atmosphere should not cause federal secondary ambient air quality standards to be exceeded. No adverse effect on air quality is expected.
5.5.3 Effect of Plant Emissions 5.5.3.1 Emission and Air Quality Standards There are no state or federal emission standards which apply specifically to cooling towers or stationary diesel engines at nuclear facilities.
Air quality standards applicable to the operation of River Bend Station include those relating to effects of cooling tower emissions (Section 5.5.3.2) and the operation of Supplement 2 5.5-6 March 1982
=
o _
^
ERBS ER-OLS
~
l7 i ITables!5.8-1 and 5.8-2. represent the calculated: sound levels
" -fromLthe majorinoise; sources Lonly. The. winter condition'-
- represents ~ the worst case when the ambient sound levels are at their lowest and: plant' noise is- more. noticeable. The
, ~ calculated-;1evel ;without' tree. attenuation represents the
-intruding noise-level from the plantland does 'not include
. . ambient noise.
Th'e maximum. expected increase in the ambient levels is.12>dB orLless'during the winter! months when the noise flanks over the' trees. When the. noise does not flank over the trees.but-
- is . attenuated through the trees, there should be :no significant noise increase at the ambient survey locations.
-Sound level -measurements- will be- made when Unit 1 is in
- op'eration, to. confirm natimated sound levels at the property line-and at the measurement locations. The data acquisition will be similar to the two previous site- noise surveys (Section 6.7).
-5.8.2 Social and Economic 5.8.2.1 Direct Impact of Station Operation
.. The ' state of Louisiana exempts-industrial plant structures, 1
'from-ad' valorem taxes for a period of 10 yr after the plant-i m/ tis - placed in service when the exemption is applied for and approved by the Louisiana Board of Commerce and-Industry and-the governor. An exemption has been approved for. River Bend Station. This exemption does not-include the property <nt
- which. the plant is situated. In order to obtain this exemption, GSU agreed to give preference to material, equipment, and labor obtained in Louisiana or from Louisiana vendors, as discussed in Section 4.4.
Ad valorem taxes for River Bend Station - Unit 1, which become available to the parish after the exemption period expires, have been estimatedforthe_first5yrfollowingl2
<the' exemption period. The estimated payments appear in Table 5.8-5 and apply only to River Bend Station and dc not include taxes on other facilities or property, such as a substation or 500-kV line.
. Estimated tax- payments range from $11.968 million in the eleventh-year of station operation to $7.204 million in the 2
' fifteenth year. These estimates are based on an estimated tax rate and a GSU assessment of 25 percent- of fair market value while Cajun Electric Power Cooperative is assessed on 15 percent of fair market value. The tax rate will be determined by the parish. For the purpose of I h LSupplement 2 5.8-3 March 1982 A ,/
9'e wre m m es--em e m e +w ,w 4e w _+wm. s
RBS ER-OLS estimating, the tax rate was set at 27 mills for the eleventh year of operation and reduced annually to a level of 19 mills in the fifteenth year because of the magnitude
.of revenue to the-parish.
Effects of these revenues on West Feliciana Parish will depend on local planning of capital expenditures. The potential exists for the parish to gain significant benefits from the taxes generated by the operation of River Bend Station.
Estimated sales taxes to be paid during the first 5 yr of optration of Unit 1 are given in Table 5.8-6.
In addition to taxes, it is estimated that approximately one million (1985 dollars) of materials and supplies will be
~
purchased annually within an 80-km radius of the site.
Because. River Bend Station is essentially self-contained and isolated during normal facility operations, there will be no direct impacts to community facilities and services.
5.8.2.2 Impacts Associated with operating Staff Permanent local operating staff for River Bend Station 9l 2 Unit 1 is expected to number approximately 500. To the extent possible, operating personnel will be drawn from the local area. Other personnel are expected to settle in communities throughout the parishes surrounding River Bend Station, including the city of Baton Rouge and adjacent communities which are a 30- to 45-minute commute by automobile from the River Bend site. Highway improvements in progress on US Highway El secti.ons between Baton Rouge and the site are expected to shorten the driving time for commuters. A 6.7 mi segment between Allson and Port Hudson is complete. Construction south of Thompson Creek is expected to be completed by 1983cta> ,
At the present time (as of the end of 1981), 50 operating employees are already on staff (Table 5.8-7 shows residence distribution for these employees); the remainder will be sl hired over the next 3 yr until a total staff of 500 is reached in 1985. This staggered hiring of personnel avoids problems associated with typical relocation scenarios when a high demand for housing occurs in a short-time frame.
Instead it allows for gradual assimilation of workers into regional communities.
Because small numbers of workers will be relocating at any one point in time, it is unlikely that workers will settle Supplement 9 5.8-4 November 1984
RBS ER-OLS
~
.w .-
- ( V TABLE SA-1 L.,I '
PARAMETERS AND ASSUMPTIONS USED IN-EQUATIONS'FOR ESTIMATING DOSES TO HUMANS-F = Effluent flow rate = 9.8 ft 3/sec Tp = Transit time (Tables SA-2 and SA-3)
HDp =: Dilution factors (Tables SA-2 and SA-3)
_I = Irrigation rate.= 0.104(1/m 2 /hr) fi = Fraction.of year _ crops are irrigated =11.0 (12 months) p = Fraction equilibrium ratio of C 2* = 'l (continuous release); = 0.073 (intermittent release) g, fp = Fraction of year cows graze on_ pasture = 1.O(100%)
fs'=' Fraction of daily feed which-is pasture grass = 0.62 H = Absolute humidity = 12.9 g/m 3 Uap = Recreational usage factor (hr/yr of exposure):
Maximum individual Child Teen Adult Shoreline 14.0 67.0 12.0 Swimming 28.0 45.0 8.0 Boating :29.0 52.0 52.0 Uap: Population Child Teen Adult
- (x 47.0 9.5 8.3
()
l Shoreline
! Swimming 12.0 19.0 3.5 ,
Boating 17'.O 29.0 29.0 Vp = Total commercial U.S. fish harvest =
2.33x10kg/yr Vdp = 50 mi-commercial fish horvest = 3.4x108 kg/yr Vdp' = 50 mi sports fish harvest = 3.4x108 kg/yr Vdp = 50 mi milk production = 1.1x108 1/yr 4
[ Vdp = 50 mi meat production = 5.20x10 7 kg/yr
- Vdp =_50 mi vegetation ~ production = 4.4x108 kg/yr l
c l-i NOTE: Input parameters and assumptions used in dose equations will be taken from Regulatory Guide 1.109, Revision 1.
Site-specific information will be used for the above parameters.
Supplement 9 1 of 1 November 1984 O
L
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BBS ER-OLS TAET.E 51-4 (Cont)
Vgiggg_Aggigged Primary organisms SeE2RdAII_9ESARiERI EAIAttitI .illah4_SEEB1AESABEa_.!!911EalE4_119att Esahmi H2Isa Essi EttE 12n1EEnl .RAEE22E Allicator Fraction of year 1.0 1.0 crop consumed C-14 fractional equilibrium ratio continuous 1.0 1.0 intermittent 0.073 0.,073 Additional external dose rate parameters for animals onsite:
Location 960 meters west (innersion pathway) All secondary organisms (cazimum CHI /Q) CHI /01 = 5.78x10-7 sec/m3 CHI /02 = 1.97x10-* sec/m3 9' CHI /03 = 3.15 x 10-
- sec/m3 Lccation 953 meters west-northwest l2 (uariana D/Q) D/01 = 4.60x10-8 m-*
D/02 = 1.81x10-8 a-* g.
D/03 = 2.70x10-8 a-a.
- Sapplement 9 3 of 3 November 1984
c RBS ER-OLS gg
- ( j.~ Airborne- part'iculate . samples- will be' collected.by drawing
' air at.3;x 10-2 cu m/ min.through a' filter. After. passing throughL the -filter, thel air- passes through- an - iodine cartridge. The dust filters will be. changed weekly or 'as required by dust loading, whichever is more frequent. LAfter
. standing for 3 or.4 days to allow.the daughter isotopes of
' radon- and thoron to -decay;. the filters will'be' assayed.
weekly for' gross beta activity and' examined quarterly for gamma isotopes.
~
Airborne Iodine The indicator and control sampling stations will utilize Liodine cartridges, which will be replaced and assayed weekly for radioactive iodine-131.
- 6.2.1.1.2 Direct Radiation-Forty-four thermoluminescent dosimeter (TLD) stations will
- ' lsls 4
- be established to measure offsite exposure due. to direct radiation. An indicator station will be located in each of 167 . compass directions surrounding the plant : near the l4 l restricted area boundary. Another. set of indicator. stations is
- will be located within a 6- to lO-km range of the site .in
!. each of the 16 compass directions. Ten stations will be ls located -in ' areas of special1 interest, .such as. -local population centers, schools, or hospitals. These special kls.
- . locations are listed in Table 6.2-2. One of these special i
interest- locations also serves as one of the inner ring ,
- indicat'or stations. Three other stations will be maintained as control stations located at a distance of 16, 18, and ,
. 20 km in the east,- north, and southwest directions, respectively.
7 All stations will contain two 'TLDs. One TLD will be replaced and read monthly, the other quarterly. s.
6.2.1.1.3 Ingestion Milk j Milk appears to be the most direct and sensitive means for monitoring iodine-131 (the limitinc isotope) in terrestrial pathways. The locations of milk animals within a 5-km l, i radius of the plant in 1980 were identified in the Livestock l Survey for Radiation Exposure Pathways within a 3'1/10 mi ,
- (5-km) Radius of GSU's River Bend Nuclear Power Plant, as prepared 1by Gulf South Research Institute (GSRI),
Supplement 9 6.2-3 November 1984 f
i.
RBS ER-OLS March 1980. In a subsequent effort to establish milk h
, sampling stations for the monitoring program, it was determined that all the milking animals identified in the GSRI survey no longer existed. According to the referenced Branch Technical Position on Radiological Environmental Monitoring Program Requirements, the maximum organ dose to the individual at the 5-km distance in the highest dose potential areas (W, WNW, NW, and NNW) was determined and found to be 0.30 (from cow milk) and 0.75 mrem (from goat milk) in the WNW location. Although this value is significantly less than 1 mrem / year, a milk surveillance program will be implemented. The number of sampling sites selected and their respective locations, and the location of the control sample site, differs from those recommended in the referenced Branch Technical Position. Justification for these alternates is provided.
9 Samples from the McKowen Dairy, located 6 km ESE from the station, will be obtained for gamma isotropic and iodine-131 4 analysis semimonthly when animals are on pasture, and monthly at other times. This sampling site is the only known location within the 5- to 8-km distance from which milk samples can be readf.ly obtained.
A control sample from milking animals at the Louisiana State Penitentiary, located approximately 35 km (21.7 mi) NW of the station, will also be analyzed at the same frequency.
This site, 35-km distant, is the most practical location from which to obtain control samples.
9l The milking cow locations used in the Appendix I analysis to evaluate the radiation dose to individuals from the cow-9l milk-man pathway (Section 5.4) differ from those used in this sampling program. The Appendix I analysis is based on assumed milking cow locations. These locations constitute the closest potential grazing pasture for the cow with the highest calculated dose potential (1600 m NW, 1400 m N, and
, 1300 m NNW). The analysis remains applicable however, since this milking animal existed at the time the analysis was being performed and represents the most conservative dose estimate from the cow-milk-man pathway.
Food Products Because of the limited availability of milk samples from Sl within a 5-km radius, three types of broadleaf vegetation (leafy vegetables, e.g., spinach) will be sampled monthly sl s when crops are available from two 50-sq m onsite gardens near the area of the highest calculated annual average 9l ground-level D/Q, 1 km WNW and 2 km NW from the station.
Supplement 9 6.2-4 November 1984
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RBS ER-OLS TABLE 6.2-1 -
PN BOPEP4TIONAL AND OPER ATIONAL RADIOLOGICAL ENVIRONNENTAL SONITORING PNDGRAN ,
Exposure Pathway Number of Sangles Sampling and . Type, Frequency, AR$/2E 11521t__ And Loc 11123s aa E2111_112R_IIggueggyit,1 C - 334_Ag31vais AIRECENE ,
1 tedioiodine and Samples from 9 locations: Continuous air: sampler Radioiodine canaister: ~
Particulates operation with filter. analysis weekly .for :
3 samples from locations near collection weekly or as ,I-131 property boundaAles (in differest required by dust loading, directional sectors) with. whichever is more the highest calculated annual frequent average ground-level D/Q (NNE, N, NNN) 1~ sample from the vicinity.of Particulate sampler: -
station meteorological tower ' gross beta activity (approximately 1 km 3) following filter change (23, .
composite (by location) for gamma isotopic ( 33 quarterly 1 sample from between the station and the river (near intake embayment)
(2.8 km SSB)
I sample from the consunity having 5 the highest calculated annual average ground-level D/Q (St. Francisville, 5 km SNN) 2 samples from major communities 17 km ESE (Zachary) and 40 km SSE (Baton Rouge) 1 sample from a control location 20 km SW, in the least prevalent wind direction (Parlange Substation)
DISFCT PADIATION 5easurements from 44 locations: Thereolusiaeacent Gamma dose sonthly lI dosimeters (TLDs) or guarterly 32 stations with two or more changed monthly or dosimeters to be placed is an inner guarterly ring near the restricted area bound-ary (in each of 16 directional sectors) and an outer ring in the 6- to 10-km range (16 sectors)
Sipplement 9 1 of 3 November 1984
.yyr.~
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T1BLE 6.2-1 (Cont) 1 Exposure Pathway Number of Samples Sampling and Type, Frequency, RRd/9E_E Melt _. AR$_12cationsus 5211ecti2R_U3tnencyO 3 gg(_Agalysis Prod uce 3 samples of 3 types of leafy Monthly when available Ganna isotopic and I-131 9 vegetables grown in two oasite analysis on edible portions gardens near the site of the highest monthly when available calculated annual average ground-level D/Q (1 km UNE and 2 km NN) l9 3 samples of 3 types of leafy vegetables grown in two offsite kI 9 qardens in areas of the highest dose potential (N, NW, WNW sectors)(*)
3 samples of 3 types of leafy I9 vegetables grown at a control location (Louisiana State Penitentiary at Angola), 35 km Ns 5' Fish and I sample from downstream of plant Seasonally (e. g . , Gamma isotopic analysis Shellfish liquid discharge outfall, near Crows summer for shrimp) on edible portions . seasonally . 9 Zellerbach paperaill, of each of the when available or or semi-amasally following: river shrimp, blue semi-annually-catfish, freshwater drLa 1 sample of the same species from an upstream control location
( 8 3The number, medium, frequency, and location of sampling may vary. At times it may not be possible or practical to obtain samples of the medium of choice at the desired location or time. In such cases, suitable alternative media and/or locations will be chosen for the particular pathway in question.
(23 Particulate sample filters will be analyzed for gross beta activity 24 hrs or more af ter sampling to allow for radon and thoran daughter decay. If gross beta activity in air or water is greater than 10 times the yearly mean of control samples for any medium, gaana isotopic analysis will be performed on the individual samples.
(33 Gamma isotopic analysis means the identification and quantification of ganna-emitting radionuclides that ma y be attributable to the effluents from the facility or from weapons testing fallout.
(*3The upstream sample will be taken at a distance beyond influence of the plant discharge. The downstreaa sample will be taken in an area beyond but near the mixing zone.
(s3The upstream surface water sampling location (near LA Hwy. 10 ferry crossing) will be used as a control for drinking water sampling. 5 (83If silk-producing animals become available within a 5-ka radius of the plant, up to 3 samples from these animals will be analyzed in lieu of the leafy vegetable samples from offsite gardens in high dose-potential areas.
Supplement 9 3 of 3 - November 1984
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ENVIRONMENTAL REPORT-OLS SUPPLEMENT 9 NOVEMBER 1984
RBS ER-OLS-
- j% -Recorder accuracy Analog iO.06*F
- l\]' Digital' Less than iO.02*F
-The overall. analog and digital accuracies of the_ recorded vertical temperature difference data- are- both iO.2*F. A temperature _ . difference- accuracy of iO.1*C (iO.2*F) is specified in Regulatory Guide 1.23.
The; followingicomponent accuracies were used in the overall
+' accuracy of the. recorded dew-point data:
-Sensor accuracy 11*F Analog reduction-error 1*F 1 Recorder accuracy Analog iO.3*F Digital Less than iO.1*F The overall_ analog and digital accuracies of the recorded dew-point data _are both i1*F. A dew-point accuracy _of
.iO.5*C (approximately 11*F) is specified in Regulatory Guide 1.23.
The overall analog and digital accuracies of the recorded
-[ N'~ . precipitation data are' based primarily _on the sensor-
\ accuracy, . which is ..a function of.the rainfall rate (Table 6.4-1). ;
~
During. approximately 4 percent of the 2-yr period from l' March 17, 1977 through March 16, 1979, values could not be
- obtained from the data logger and strip charts were used.
Hourly values were determined by sight, using the equal area j' method'of data _ averaging. Wind speeds were estimated to the nearest 0.5 mph; wind -directions _were estimated to the.
nearest -5 deg; . ambient- and dew-point temperatures were estimated to the nearest 1*F; and vertical temperature.
differences were estimated to the nearest 0.1 F.
-Table 6.4-2 shows an example of the close comparison between data logger and manually digitized values.
In- the digital data collection system, temperature, dew point, and vertical temperature difference are sampled once per minute as grab samples; precipitation is totaled for each minute; and wind speed and wind direction are l-
'preprocessed through a 60-sec analog filter. These minute values are placed on the magnetic data tape.
A minimum of 15 min of data is used to derive hourly averages for each of the aforementioned parameters.
Supplement 1 6.4-5 October 1981
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Y RBS ER-OLS Whenever an entire hour of data is available for a given parameter, the entire hour of data is used.
If a minute wind speed value is less than the starting speed of the wind direction sensor (1.0 mph), the minute is assigned a value of 0.75 mph. If an average hourly wind speed value is less than the starting speed of the wind direction sensor, the hour is assigned a wind speed value of zero and the wind direction is defined as calm. If an average hourly wind speed value is between 1.0 mph and 2.0 mph, and the wind direction range is greater than or equal to 120 deg, the wind direction for that hour is defined as variable.
The data recovery percentages by parameter for the 2-yr
, monitoring period from March 17, 1977 through March 16, 1979 are shown in Table 6.4-3. The valid data collected included only one exception (150-ft dew point) to the greater than 90-percent threshold required by Regulatory Guide 1.23.
This did not pose a problem since the 30-ft dew-point data were used in the cooling tower impact models. Sporadic periods with the 30-ft dew point significantly greater than the 30-ft ambient temperature began to occur early in December 1978 and continued throughout the winter. The 30-ft dew-point data from December 5, 1978 to March 16, 1979 were eliminated from the data base, and hybrid 30-ft dew points based on the vertical temperature difference and the 150-ft dew point were estimated for this period. In cooling tower impact calculations, higher dew points yield more conservative results. Maintaining conservatism was the main consideration in the estimation scheme.
6.4.2 Operational Monitoring Program During plant operation, recording equipment will be provided in the control room for observations of wind speed and wind direction at heights of 30 and 150 ft, temperature at 30 ft, and temperature difference between 30 and 150 ft. Spare sensors, recorders, and auxiliary equipment will be maintained to ensure that each of the above observations can be made available to control room personnel in the event that the meteorological system becomes totally or partially impaired. Equipment utilized during operation may not be the same as that employed during construction of the plant.
However, the operational meteorological monitoring program will comply with applicable regulatory guidelines. In the event that the meteorological tower is damaged, wind speed, wind direction, and an estimate of stability class will be s obtained from the National Weather Service in Baton Rouge at Ryan Airport.
Supplement 9 6.4-6 November 1984
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' RBS ER-OLS n
- (u ji . Physicochemical The following characteristics were studied:
Water temperature Total residue Dissolved-oxygen -Total-nonfilterable residue pH Alkalinity Dxidation-Reduction Potential Phosphates
.Transmissivity Nitrates In situ water quality parameters were sampled in conjunction with biological sampling. Transmissivity, total residue, tot:1 nonfilterable ; residue, alkalinity, phosphates,cand nitrates were sampled monthly.
6.5.2'.2.3 Grants Bayou Phytoplankton.
Phytoplankton. were collected in 2-liter whole water samples taken quarterly at two stations. Sampling began in 1974, but was discontinued during the dry oeriod from spring 1976 to winter 1977. In 1977, Station 2 (Fig. 6. 5-2) was moved 500 ft upstream.
! / Laboratory analysis was conducted in the same manner as the L \ - river samples.
i i Benthos The benthic invertebrates. were collected by taking three E replicate Ekman grab samoles at. Stations 1 and 2
- (Fig. 6. 5-2) . - The samples were'taken quarterly, except when I
Grants Bayou was dry from spring 1976 to winter _1977.
Monthly' samples were taken from 1978 to:1980. The benthic organisms were identified and counted using the same procedures described for river benthos.
Fish Fish were collected in seines and dip nets on a quarterly schedule from ~1974 to 1977. All fish captured were l identified, counted, weighed, and measured.
! Physicochemical
~ The following characteristics were studied:
Temperature Total residue l
Dissolved oxygen Total nonfilterable residue
)
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RBS ER-OLS Conductivity Alkalinity pH Phosphates Oxidation-Reduction Potential Nitrates Water quality was sampled in conjunction with regular biological sampling.
6.5.2.3 Preoperational and Operational Monitoring Plant operation is not expected to have significant ir.. pacts on aquatic biota. To verify this, 2 yrs each of preoperational and operational monitoring will be performed as described in the following outline. The operational pro-gram will be a continuation of the preoperational monitoring and will begin at the start of Unit 1 operation. Results will be reviewed following the first year and if no unex-pected impacts have been detected, the same level of effort will take place during the second year. Unless the first 2 yrs of_ operational study show that continued monitoring is required, all sampling could then be terminated. A similar schedule would be followed for Unit 2. Because no plant discharges will enter Alligator Bayou directly during operation, preoperational and operational monitoring will be s
performed only in the Mississippi River and Grants Bayou.
Mississippi River General - Because even near-field effects will be dif-ficult to measure (if detectable) sampling will be con-ducted along the eastern shore only, at the three stations used during previous LSU studies and a station recently established in the intake embayment (Figure 6.5-3). Station V-A is representative of the area of natural shoreline above the plant discharge, IV-A is in the immediate vicinity of the discharge, and III-A is below the influence of the discharge. The em-bayment (Station 101) is a unique situation that may at-tract distinctive biotic communities. Inclusion of the embayment in the monitoring program will afford an evaluation of its relationship to the natural shoreline habitats.
Substrate-Associated Macroinvertebrates - Monthly sam-ples will be taken in triplicate at each station. Ma-8 croinvertebrates will be identified and counted in order to estimate mean numbers per unit of effort per station per visit.
Supplement 9 6.5-10 November 1984 O
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