ML19056A413
| ML19056A413 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 01/31/2019 |
| From: | GeoSyntec Consultants, South Carolina Electric & Gas Co |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19056A440 | List: |
| References | |
| RC-19-0012 | |
| Download: ML19056A413 (24) | |
Text
Prepared for SCE&G, VC Summer Station Highway 215 and Bradham Blvd Jenkinsville, South Carolina 29065 COOLING WATER SYSTEM DATA V.C. SUMMER NUCLEAR STATION UNIT 1 40 CFR § l22.2l(r)(5)
--** .. SOUTH CAROLINA ELECTRIC & GAS COMPANY . , **JENKINSVILLE, SOUTH CAROLINA Prepared by Geosyntec C> consultants engineers I scientists I innovators 1255 Roberts Boulevard, Suite 200 Kennesaw, Georgia 30144 Project Number GK5356 January 2019 Geosyntec t> consultants TABLE OF CONTENTS 1. IN"TRODUCTION
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- .......................................
- .. 1 2. FACILITY AND COOLIN"G WATER SYSTEM DESCRIPTIONS
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3 2.1 Operation of the Cooling Water System ......................................................
4 2.1.1 Proportion of the Design Intake Flow Used ...................................
5 2.1.2 Days of Cooling Water System Operation and Seasonality
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5 2.2 Design and Engineering Calculations
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6 . 2.3 Existing Impingement and Entrainment Technologies or Operational Measures ........................................................................................
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6 3.
SUMMARY
AND CONCLUSION
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- ...... 7
- 4. . REFERENCES CITED ..........
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8 Figure 1 Figure 2 Figure 3 . .. . LIST OF FIGURES Site Vicinity ofVCSNS Unit 1 Site Layout of the VCSNS Unit 1 Cooling Water Intake Structure and the Fairfield Pumped Storage Facility V.C. Summer Nuclear Station (VCSNS Unit l)Water Balance Diagram GK5356/R5_CWSD VCSNS_Rev2019_GA160669.docx 01.23.2019 BTA CFR cfs CWIS EPA FPSF ft gpm hp MGD MW NGVD29 NPDES ... NRC rpm SCDHEC SCE&G LIST OF ACRONYMS AND ABBREVIATIONS best technology available Code of Federal Regulations cubic feet per second cooling water intake structure U.S. Environmental Protection Agency Fairfield Pumped Storage Facility feet gallons per minute horsepower million gallons per day megawatts National Geodetic Vertical Datum of 1929 National Pollutant Discharge Elimination System U.S. Nuclear Regulatory Co~mission . revolutions per minute Geosyntec t> consultants South Carolina Department of Health and Environmental Control South Carolina Electric and Gas Company GK.5356/R5_CWSD VCSNS_Rev2019_GA!60669.docx ii 01.23.2019 Geosyntec 0 consultants
- 1. INTRODUCTION This report provides cooling water system data for South Carolina Electric & Gas Company's (SCE&G's)
Virgil C. Summer Nuclear Station (VCSNS) Unit 1. VCSNS Unit 1 is an existing nuclear-powered generating facility located on Monticello Reservoir in the Broad River basin near Jenkinsville, Fairfield County, South Carolina.
SCE&G operates VCSNS Unit 1 under National Pollutant Discharge Elimination System (NPDES) Permit Number SC0030856.
The information provided in this report supports the facility's compliance with section 316(b) of the Clean Water Act. The U.S. Environmental Protection Agency (EPA) published 316(b) regulations for coo ling water intake structures ( CWISs) at existing power generating and manufacturing facilities that became effective October 14, 2014. The final 316(b) rule requires the submittal of applicable CWIS information under 40 CFR § 122.21(r) to the South Carolina Department of Health and Environmental Control (SCDHEC), the NPDES permitting agency in South Carolina.
As provided in the NPDES permit application requirements at 40 CFR§ 122.21(r)(5), all .existing facilities with CWISs must submit cooling water system data to incluoe those applicable provisions of the following:
- (i) A narrative description of the operation of the cooling water system and its relationship to cooling water intake structures; the proportion of the design intake flow that is used in the system; the number of days of the year the cooling water system is in operation and seasonal changes in the operation of the system, if applicab)e; the proportion of design intake flow for contact cooling, non-contact cooling, and process uses; a distribution of water reuse to include cooling water reused as process water, process water reused for cooling, and the use of gray water for cooling; a description of reductions in total water withdrawals including cooling water intake flow reductions already achieved through minimized process water withdrawals; a description of any cooling water that is used in a manufacturing process either before or after it is used for cooling, including other recycled process water flows; the proportion of the source waterbody withdrawn (on a monthly basis); GK.5356/RS
_ CWSD VCSNS_Rev2019
_ GA160669.docx 01.23.2019 Geosyntec 1> consultants (ii) Design and engineering calculations prepared by a qualified professional and supporting data to support the description required by paragraph (r)(5)(i) of this section; and (iii) Description of existing impingement and entrainment technologies or operational measures and a summary of their performance, 1ncluding but not limited to reductions to entrainment mortality due to intake location and reductions in total water withdrawals and usage. The following sections describe the VCSNS Unit 1 cooling water system. GK5356/R.5_CWSD VCSNS_Rev2019_GA160669.docx 2 01.23.2019 Geosyntec 0 consultants
- 2. FACILITY AND COOLING WATER SYSTEM DESCRIPTIONS VCSNS Unit 1 is a single-unit, 972.7-megawatt (MW), nuclear-fueled, base-load facility located at the southern end of Monticello Reservoir, a freshwater lake (Figure 1). Unit 1 operates using a single CWIS located along the shoreline (Figure 2). It has a design intake capacity of approximately 533,122 gallons per minute (gpm) or 768 million gallons per day (MGD). Because Monticello Reservoir was constructed for the purpose of serving as part of the cooling water system (U.S. Nuclear Regulatory Commission
[NRC], 2004), its use as a cooling impoundment for VCSNS Unit 1 has been determined by SCDHEC to be a "closed-cycle recirculating system" under 40 CFR, Part 125, Subpart J, §125.92(c)(2).
The U.S. Energy Information Administration (2012) rated VCSNS Unit 1 in 2017 as having 971 MW summer capacity and producing 6,913,294 megawatt-hours of net generation.
Monticello Reservoir is a 6,500-acre freshwater lake with 51 miles of shoreline and a total storage volume of approximately 400,000 acre-feet
... The reservoir has an average depth of 59 feet (ft), a maximum depth of 125 ft, and a watershed area of 17.4 sqµare miles in the Frees Creek valley, a tributary to the Broad:River.
Monticello Reservoir also *serves-as the upper reservoir for the* Fairfield Pumped Storage Facility (FPSF) and exchanges water daily with 4,398-acre*Parr Reservoir (the lower reservoir) (Figure 2). FPSF is part of the Parr Hydroelectric Project operated by SCE&G and licensed by the Federal Energy Regulatory Commission.
The surface elevation of Monticello Reservoir fluctuates daily within an operating band of 420.5 to 425.0 ft mean sea level (NGVD29).
The VCSNS Unit 1 CWIS has an inlet bay on the south shore of Monticello Reservoir with a depth of 30 to 40 ft. The circulating pump house intake structure located within the inlet bay has six intake bays. Parallel concrete retainer walls on either side of the pump house and a skimmer wall extending 9.5 ft below the full pool elevation direct the withdrawal of cooling water from the deeper, seasonally cooler portion of the reservoir.
Six vertical 3/8-inch mesh traveling water screens strain out debris and any impinged organisms.
Screen-wash water supplied to each traveling screen collects in a debris trough that conveys debris and any organisms to a trash sump, from which the material is discarded.
Three circulating water pumps convey the screened intake flow to the condensers.
GK5356/R5_CWSD VCSNS_Rev2019_GA160669.docx 3 01.23.2019 Geosyntec 1> consultants After leaving the condensers, the heated cooling water discharges to Monticello Reservoir via a discharge basin and a 1,000-ft-long discharge canal located east of the CWIS beyond the service water pond and jetty (Figure 2). 2.1 Operation of the Cooling Water System VCSNS Unit 1 operates exclusively in a wet recirculating/closed-loop mode with Lake Monticello.
The circulating water system at the facility is designed to remove 6.67 x 10 9 British thermal units per hour of heat from the main and auxiliary condensers as well as the turbine auxiliaries (NRC, 2004). The cooling water system includes three vertical, wet-pit type circulating water pumps each with an operating design point of 395.94 cubic feet per second (cfs) at 2,095 horsepower (hp) and 294 revolutions per minute (rpm). Three pumps are required when -at full power, with an average total flow of 1,187.8 cfs. Flow from the individual pumps combine into a single intake pipe before reaching the condensers.
To lirriiphe heat .load rej~qt~d to Monticello Reservoir, in 1996 .. SCE&G installed thf; turbine building closed-cycle cooling water system to provide cooling for certain station . loads that were previously handled by the circulating water system. The closed system
- does not handle any of the heat load directly associated with reactor cooling. The cycle cooling water system supplies cooling water to equipment associated with th~ turbine, generator, and other non-nuclear systems in the turbine building.
The system uses a forced-draft cooling tower with four fans to reject waste heat to the atmosphere.
The cooling tower structure is 86.9 by 41.9 ft with an overall height of 22.4 ft above grade. It is located outside of the protected area fence, approximately 500 ft northwest of the reactor building.
Under normal operation, one of the two cooling tower basin pumps circulates treated water, transferring heat removed from the* various turbine building components to spray water and then to the atmosphere by evaporation.
The turbine building closed-cycle water system is independent of plant emergency cooling facilities and is not required for reactor protection or safe sh~tdown (NRC, 2004). Due to the fact that this is a wet cooling tower, a small percentage of the total flow usually has to be made up to cover the losses associated with evaporation and blow-down; this is estimated to be about 500 gpm or 1.1 cfs. This make-up flow is derived from the facility's water treatment system, which includes two clarifier raw water pumps that* withdraw water from the pump house basin independent of the facility's circulating cooling water system. GK5356/R5_
CWSD VCSNS__Rev2019
_ GA160669.do6x 4 01.23.2019 Geosyntec 1> consultants Cooling water for the main cooling water circulating system is withdrawn from Monticello Reservoir, passed through the condensers, and ultimately returned to Monticello Reservoir.
After leaving the condensers, circulating water moves via a diameter pipe from the plant to a semi-enclosed discharge basin (Figure 2). From the basin, the heated effluent moves through a 1,000-ft long discharge canal to Monticello Reservoir.
The discharge canal directs the discharge flow (heated effluent) to the northeast.
A 2,600-ft long jetty prevents the recirculation of the heated water (NRC, 2004). 2.1.1 Proportion of the Design Intake Flow Used The distribution of cooling water flows at VCSNS Unit 1 and associated water balance diagram are presented in Figure 3. Primarily all water withdrawn at the pump house associated with normal operations is used for cooling purposes except that withdrawn by the two I 00-percent capacity screen-wash pumps used to provide screen-wash water to the six traveling screens, and the two 100-percent capacity clarifier raw water pumps associated with *the. facility's water treatment plant. There are also two, fire-service pumps, one electric and one diesel-driven, dedicated for fire-fighting activities that when operated in an emergency, withdraw from the CWIS pump basin. Each screen-wash pump draws from the discharge side of circulating pump number IC located on the west side of the pump house.. Each screen-wash pump is rated at 200 hp at 1,750 rpm and provides approximately 2,000 gpm (4.46 cfs) for screen wash . . Each clarifier raw water pump draws from the circulating pump house basin east of circulating pump number IA and provides approximately 1,200 gpm (2.67 cfs) for the on-site water treatment cycle, primarily for potable water and other non-cooling water related purposes; however, approximately 500 gpm is used as make-up water for the turbine building closed-cycle water system. Considering screen wash withdrawals and expected nominal losses through the system, the proportion of design intake flow used for cooling water purposes is in.excess of 99 percent. 2.1.2 Days of Cooling Water System Operation and Seasonality The VCSNS Unit 1 cooling water system operates continually throughout the year, with the exception of scheduled maintenance and refueling outages or unexpected maintenance outages. VCSNS Unit 1 is on an 18-month maintenance and refueling outage cycle for the replacement of approximately one-third of the facility's fuel GK5356/R5_CWSD VCSNS_Rev2019_GA160669.docx 5 01.23.2019 Geosyntec 1> consultants assemblies (SCE&G, 2015). Refueling outages typically last for 30 to 60 days. During the outage, SCE&G also performs preventive maintenance of circulating water pumps and other components as needed to increase Unit 1 's safety, reliability, and efficiency.
2.2 Design
and Engineering Calculations The 316(b) regulations for existing facilities apply to VCSNS Unit 1 based on the applicability criteria at 40 CFR § 125.91(a).
The facility is a point source, its design intake flow is greater than 2 MGD, the CWIS withdraws from waters of the U.S., and it uses significantly more than 25 percent of the water withdrawn for cooling purposes under all operational modes. If deemed relevant by SCDHEC for the purposes of compliance with 40 CFR § 122.21(r)(5), SCE&G will provide additional information pertaining to the*VCSNS Unit 1 cooling water system upon request. 23 Existing Impingement and Entrainment Technologies or Operational Measures ******., Monticello Reservoir was constructed for the purpose of serving as part of the cooling . water system (NRC,_2004).
Thus, the use of the reservoir as a cooling impoun<:1ment for VCSNS Unit 1 has been determined by SCDHEC and EPA to be a "closed-cycle recirculating system" as defined under 40 CFR §125.92(c)(2).
The use of a closed-cycle recirculating system is one of the available alternatives established by EPA for complying with the best technology available (BTA) standards for impingement mortality under 40 CFR §125.94(c)(l).
VCSNS Unit 1 currently does not implement entrainment technologies or operational measures.
However, in addition to the use of closed-cycle recirculation, the use of a skimmer wall at the circulating water pump house may further contribute to reduction in entrainment of early life stages of fish by drawing cooling water from mid depths within the reservoir, where ichthyoplankton densities are lower than in shoreline surface waters (Dames & Moore, 1985). GK5356/R5_CWSD VCSNS_Rev2019_GA!60669.docx 6 01.23.2019 Geosyntec 1> consultants
- 3.
SUMMARY
AND CONCLUSION VCSNS Unit 1 is a single-unit, 972.7-MW, nuclear-fueled, base-load power generating facility located at the southern end of Monticello Reservoir in Fairfield County, South Carolina.
Monticello Reservoir is a 6,500-acre freshwater impoundment constructed for the purpose of serving as part of the VCSNS cooling water system. The Unit *1 CWIS has a design intake flow of approximately 768 MGD. Monticello Reservoir also serves as the upper reservoir for the FPSF, which is part of SCE&G's Parr Hydroelectric Project. The VCSNS Unit 1 CWIS has as an inlet bay on the south shoreline of Monticello Reservoir that contains a circulating pump house with six intake bays. Cooling water is withdrawn from depths greater_ than 9.5 ft below the reservoir full-pool elevation.
Six vertical 3/8-inch mesh traveling water screens strain out debris and any impinged organisms, which are conveyed by the screen-wash system to a trash sump for disposal.
Three.circulating water pumps convey the screened intake flow to the condensers.
- Tb~ VCSNS Unit 1 cooling*water systems operate continually throughout the year with the exception of maintenance and refueling outages scheduled every 18 months. The cooling*water system.includes three vertical, wet-pit t)'pe circulating water pumps each with a design point of 395.94 cfs at 2,095 hp and 295 rpm. Three pumps are required when at full power, with an average total flow of 1,187.8 cfs. Flow from the individual pumps combine into a single intake pipe before reaching the condensers.
To limit the heat load rejected to Monticello Reservoir, a closed-cycle cooling water system in the turbine building provides cooling for equipment associated with the turbine, generator, and other non-nuclear systems. After leaving the condensers, circulating water moves via a 12-ft-diameter pipe to a discharge basin. From the basin, the heated effluent moves through a 1,000-ft-long discharge canal to Monticello Reservoir.
A 2,600-ft long jetty prevents the recirculation of the heated water. The use of Monticello Reservoir as a cooling impoundment for VCSNS Unit 1 has been determined by SCDHEC and EPA to be a closed-cycle recirculating system, which is an option available for complying with the BTA standards for impingement mortality under 40 CFR §125.94(c)(l).
GK5356/R5_CWSD VCSNS_Rev2019_GA160669.docx 7 01.23.2019 Geosyntec 1> consultants
- 4. REFERENCES CITED Dames & Moore. 1985. 316(b) demonstration for the Virgil C. Summer Nuclear Station for the South Carolina Department of Health and Environmental Control and the Nuclear Regulatory Commission.
March 1985. South Carolina Electric and Gas Company (SCE&G). 2015. V.C. Summer Nuclear Station completes refueling outage. SCE&G Newsroom, December 3, 2015. Accessed at: https://www .sceg.com/about-us/newsroom/2015/12/03/v summer-nuclear-station-completes-refueling-outage.
U.S. Energy Information Administration.
2012. State nuclear profiles 2010. U.S. Department of Energy, Washington, D.C. April 2012. Accessed at: https://www .eia.gov/nuclear/state/pdf/snp201 O.pdf ..
- US; Nuciear Regulatory Commission (NRC). 2004. Generic Environ:mental Impact Statement for License Renewal of Nucleai:.~lants.
Supplement 15 Regarding Virgil_{:.
Summer Nuclear Station: Final Report. U.S. Nuc.l~J1.r Regulatory , , Commission, Washington, DC. GK5356/R5_CWSD VCSNS_Rev2019_GA160669.docx 8 01.23.2019 FIGURES
( I I ' / ,. t * / Hope Station \ / fl ~Q . ! / I LEGEND N 10-km (6-mi) radius of V.C. Summe r N Interstates N Major Roads /\v Minor Roads County Boundaries
-Lak es and Rivers Site Vicinity of VCSNS Unit 1 Jenkinsville , South Carolina ( '"' Plll'T'H~dro
- "" Montic_~llo *N Sub-impoundm~nt
'Ii E s ! *!' y / r <"' '),~ , ri,<.r J ..... ' ' j / I ' I .,.(\ ) 'i ti' *Janklnsvllla
\ \ " l ... ' 1 0 ----_o 1 Geosyntec t> consultants Atlanta , Georgia { \ .sc ~1$ I ..I 2 3 Kilome t ers 2 3 l\lt l&S Source: NRC , 2004. Figure 1 0 Pan" Reservoir Mo11ticello Reservoir EXCLUS IO N Z O NE Wastewate r Treatment Area SOURCE: NRC , 2004. Site Layout of the VCSNS Unit 1 Cooling Water Intake Structure and the Fairfield Pumped Storage Facility Jenkinsville , South Carolina 1500 0 1500 Geosyntec C> consultants ATLANTA , GEORGIA 3000 feet Figure 2 V C Summer Nuclear Station Water Balance Diagram From Monticello Reservoir 0 CW Pump Hou5e 0 = 767.67 MGD = Main and auxiliary condensers.
Main& Auxiliruy Condensers To l)Jant Intake -~----.,...---..i Waler Trea1n1ent To Discharge Bay To Multiple Outfalls (see D-921-931 8 = 2.88 MGD = Screen wash pump flow backwash for the traveling water scree11s 8 = 1.73 MGD = Clarifier raw water process ( non-cooling water flow) to U1e on-site water treatment plant Geosyntec f> consultants Atlanta, Georgia FIGURE NO.: 3 Prepared by:: 1-------------------1 PROJECT NO.: GK3601-04 DOCUMENT NO.: GA050382 FILE: Fi.gure*2-4.ppt CH2MHILL Lockwood Greene Prepared for SCE&G, VC Summer Station Highway 215 and Bradham Blvd Jenkinsville, South Carolina 29065 METHOD OF COMPLIANCE V.C. SUMMER NUCLEAR STATION UNIT 1 40 CFR § 122.21(r)(6)
SOUTH CAROLINA ELECTRIC & GA.S COMP ANY . -JENKINSVILLE, SOUTH CA~OLINA Prepared by Geosyntec t> consultants engineers I scientists I innovators 1255 Roberts Boulevard, Suite 200 Kennesaw, Georgia 30144 Project Number GK5356 January 2019 Geosyntec t> consultants
_ TABLE OF CONTENTS 1. IN"TRODUCTION
................................................................................................
1 2. FACILITY DESCRIPTION
.................................................................................
1 3. CHOSEN METHOD OF COMPLIANCE
...........................................................
2 4. SU1\11\1ARY AND CONCLUSION
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2 4. REFERENCES CITED ........................................................................................
3 Figure J .... Figure 2 LIST OF FIGURES
- Site Vicinity ofVCSNS Unit r* . . ... ,, ... Site Layout of the VCSNS Unit 1 Cooling'-\Vater Intake Structure and the Fairfield Pumped Storage Facility GK.5356/R6_CMOC VCSNS_GAJ90015.docx 01.30.2019 CFR cfs CWA CWIS FERC fpm fps ft FPSF gpm hp MSL MW ** ... .N.GVD29 NPDES NRC psi rpm SCDHEC SCE&G VCSNS LIST OF ACRONYMS AND ABBREVIATIONS Code of Federal Regulations cubic feet per second Clean Water Act cooling water intake structure Federal Energy Regulatory Commission feet per minute feet per second feet Fairfield Pumped Storage Facility gallons per minute horsepower
- mean sea level megawatts.
National Geodetic*\r~rtical Datum of 1929 National Pollutant Discharge Eiimination System Nuclear Regulatory Commission pounds per square inch revolutions per minute Geosyntec 1> consultants South Carolina Department of Health and Environmental Control South Carolina Electric and Gas Company Virgil C. Summer Nuclear Station GK5356/R6_CMOC VCSNS_GA190015.docx ii 01.30.2019 Geosyntec t> consultants
- 1. INTRODUCTION This report provides the chosen method of compliance for South Carolina Electric & Gas Company's (SCE&G's)
Virgil C. Summer Nuclear Station (VCSNS) Unit 1. VCSNS Unit 1 is an existing nuclear-powered generating facility located on Monticello Reservoir in the Broad River basin near Jenkinsville, Fairfield County, South Carolina.
SCE&G operates VCSNS Unit 1 under National Pollutant Discharge Elimination System (NPDES) Permit Number SC0030856.
The information provided in this report supports the facility's compliance with section 316(b) of the Clean Water Act. The U.S. Environmental Protection Agency published 316(b) regulations for cooling water intake structures (CWISs) at existing power generating and manufacturing facilities that became effective October 14, 2014. The final 3 l 6(b) rule requires the submittal of applicable CWIS information under 40 CFR §. 122.2l(r) to the South Carolina Department of Health and Environmental Control (SCDHEC), the NPDES permitting agency in South-Carolina.
As provided in the NPDES permit applicatfon requirements at 40 CFR *§ 122.21 (r)(6), all existing facilities with .CWISs must identify the chosen-method of compliance:
The owner or operator of the facility must identify the chose method of compliance for the entire facility; alternatively, the applicant must identify the chosen compliance method for each CWIS at its facility.
The applicant must identify any intake structure for which a BTA determination for Impingement Mortality under 40 CFR 125.94 (c)(ll) or (12) is requested.
In addition, the owner or operator that chooses to comply via 40 CFR 125.94 (c)(5) or (6) must also submit an impingement technology performance optimization study as described in 40 CFR § 122.2J(r)(6)(i) and (ii). 2. FACILITY DESCRIPTION VCSNS Unit 1 is a single-unit, 972.7-megawatt (MW), nuclear-fueled, base-load facility located at the southern end of Monticello Reservoir, a freshwater impoundment (Figure 1 ). Unit 1 operates using a single CWIS located along the shoreline (Figure 2). It has a . design intake capacity of approximately 533,122 gallons per minute or 768 million gallons per day (MGD). The actual intake flow of the CWIS is greater than 125 MGD. Although the cooling water system operates in a "once-through" mode, Monticello GK5356/R6
_ CMOC VCSNS_ GAi 90015.docx 01.30.2019 Geosyntec 1> consultants Reservoir was constructed for the purpose of serving as part of the cooling water system (U.S. Nuclear Regulatory Commission
[NRC], 2004). Thus, the use of Monticello Reservoir as a cooling impoundment for VCSNS Unit 1 has been determined by SCDHEC and EPA to be a closed-cycle recirculating system under 40 CFR, Part 125, Subpart J, §125.92(c)(2).
- The VCSNS Unit 1 CWIS consists of an inlet bay created by two embankments and concludes at the circulating pump house structure positioned parallel to the southern shoreline of Monticello Reservoir near the FPSF. Cooling water is drawn in at the pump house, passed through the steam condenser as well as the auxiliary condensers, and discharged back to Monticello Reservoir via a discharge canal located beyond the jetty and east of the CWIS (Figure 2). 3. CHOSEN METHOD OF COMPLIANCE Existing.facilities that withdraw more than 2 MGD have several options to select from to meet the impingemenf reduction standard ~s outlined in §125.94(c).
VCSNS -unit 1 utilizes the option provided in §125.94(c)(l):
a closed-cycle recirculating.system; actual intake flows are monitored daily .. VCSNS Unit 1 is designed to operate in one cooling mode: closed-cycle.
It utilizes Monticello Reservoir as both the source water body and receiving water body; in a loop, wet recirculating system. 4.
SUMMARY
AND CONCLUSION VCSNS Unit 1 is a single-unit, 972.7-MW, nuclear-fueled, base-load power generating facility located at the southern end of Monticello Reservoir in Fairfield County, South Carolina.
Monticello Reservoir is a 6,500-acre freshwater impoundment constructed for the purpose of serving as part of the VCSNS cooling wat~r system. The single, shoreline CWIS is part of a cooling water system that has been determined by SCDHEC and EPA to be a closed-cycle recirculating system under the definition at 40 CFR §125.92(c)(2).
VCSNS Unit 1 is designed to operate in one cooling mode: closed-cycle.
It utilizes Monticello Reservoir as both the source water body and receiving water body; in a loop, wet recirculating system. GK5356/R6_CMOC VCSNS_GA190015.docx 2 01.30.2019 Geosyntec t> consultants
- 4. REFERENCES CITED U.S. Nuclear Regulatory Commission (NRC). 2004. Generic Environmental Impact Statement for License Renewal of Nuclear Plants. Supplement 15 Regarding Virgil C. Summer Nuclear Station. Final Report. U.S. Nuclear Regulatory Commission, Washington, DC. GK5356/R6_
CMOC VCSNS_GA190015.docx 3 01.30.2019 . ***. 1 FIGURES I
- Hope Station J I ~-/ **. Q~i I \ ' I ' LEGEND N 10-km (6-mi) rad i us ofV.C. Summer N Interstates N Major Roads M i nor Roads County Boundaries
-Lakes and Rivers Site Vicinity of VCSNS Unit 1 Jenkinsville , South Carolina Monticello Su~im_pou-~dment __ k_ \ 0
- Jenklnsvllle 1 0 ----0 1 Geosyntec t> consultants At l anta , Georgia \~f. s -< l } I "* ( .-\ / I f \_ 2 3 KIiom et ers 2 3 M ll es Sou r ce: NRG , 2004. Figure 1 0 Pa" Reservoir Mo11ti.cello Reservoir EX C L U SION ZO NE Wastewater Treatment Area SOURCE: NRC , 2004. Site Layout of the VCSNS Unit 1 Cooling Water Intake Structure and the Fairfield Pumped Storage Facility Jenkinsville, South Carolina 1500 0 1500 Geosyntec
<> consultants ATLANTA, GEORGIA 3000 feet Figure 2