ML17353A056
| ML17353A056 | |
| Person / Time | |
|---|---|
| Site: | River Bend  |
| Issue date: | 12/05/2017 |
| From: | Entergy Operations |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML17353A048 | List: |
| References | |
| RBG-47802 | |
| Download: ML17353A056 (22) | |
Text
RIVER BEND STATION ENVIRONMENTAL REPORT OPERATING LICENSE STAGE SUPPLEMENT 9
RBS ER-OLS 2.9 AMBIENT NOISE Two ambient surveys have t.een conducted in the vicinity ot the River Bend site.
The first survey was performed in June 1972 prior to construction and the latter in January 1980 during Unit 1
construction.
Refer to Section 6.7 for the noise survey methodology and Section 5. l::l.. 1.2 for the assessment of the effects produced by the operational sound levels.
Noise Sampling J-.rea The noise sampling area is shCMn in Fig. 2.9-1.
In general, the terrain surrounding the site is mostly wooded except for the Mississippi River, some open
- fields, and farmland..
Eight measurement locations were selected to represent the acoustical environment in the vicinity of the site..
Measurement location 1 is situated on the southeast edge of St.
Francisville, approximately 2
km (1.25 mi) west-northwest of the site. This is the only population center within a
q.,B-km (3-mi) radius of the site.
Measurement locations 2, 3, q, 5, and 7 were selected as typical of the rural-farm areas.
Location 6
was selected at the intersection of Route 61, Route 966, and Police Jury Road to measure representative traffic noise in the vicinity of roads nea'."': the site..
Location 8 is in the general proximity of the Crown Zellerbach Papermill on Route 964, which is one of the major industrial areas surrounding the site.
The exact locations of the measurement positions are described in Table 2.. 9-1..
1972 Survey This survey was conducted during JUne 15-16, 1972, prior to any construction at the River Bend site. The dominant noise source for the majority of the locations was insect noise, which masked all other sources with the exception of the papermill, the dominant noise source at location 8.
With the insect noise, the minimum sound levels at all locations ranged from q9 to 56 d.BA, which is equivalent to those found in a "Normal Suburoan Residential" areaci>..
- However, when the sound levels were adjusted to eliminate insect noise, the minimum calculated sound levels ranged from 31 to 39 dBA and are typical of a "Rural Community," with the exceptions of measurement locations 3, 4, and 8, which have generally higher sound levels due to their proximity to the paperrni 11 c 1 >.
'I*he residual min imura A---weighted sound levels measured during the daytime and nighttime hours at the eight locations are presented in Table 2.9-2.
2.. 9-1
RBS ER-OLS 1980 Survey During January 9-10, 1980, a second ambient noise survey was conducted.
There was little construction activity ongoing at that time.
The reactor mat was poured January 15 through 17, 1980.
Accordingly, no significant contributing noise-producing construction activity was in progress at that time.
- Also, approximately two-thirds of the noise measurements were obtained during nonworking hours.
The principal contributors to the noise environment remained basically the same as for the 1972 survey.
Big Cajun No. 2
- Units 1, 2, and 3, a coal-fired power plant located across the Mississippi River approximately 2 km (1.25 mi) from the River Bend site, was not yet on-line at the time of this survey.
These units are scheduled for startup in the early 1980s.
The 1972 measurement locations remained the same with the exception of the following three adjustments.
Location 2 was relocated approximately 900 m (3,000 ft) north of the radio tower on the perimeter of the new site boundary.
Measurement location 3, inaccessible due to muddy roads, was relocated on the River Access Road, approximately 30 m (100 ft) west-southwest from a 69-kV transmission line onsite.
Measurement location 8 had to be abandoned because of current inaccessibility to private property on which the papermill is located.
The significant noise sources of this survey were a
papermill and highway traffic.
The insect noise was absent due to the winter season.
A comparison of the insect-corrected levels for the 1972 survey with the measured levels of the 1980 survey is presented in Table 2.9-2 and shows good agreement, with the exception of locations 2 and 6
which are 5-8 dBA higher.
Highway traffic and the papermill noise contributed to the ambient sound levels at locations 2 and 6 being slightly higher than was anticipated in the 1972 survey estimate.
The minimum ambient sound levels at all seven locations ranged from 34 to 41 dBA and are typical of a "Rural Community 11 t 1 ).
The sound level data from the 1980 survey is reported in Table 2.9-2.
Table 2.9-3 presents the measured equivalent sound level data for the seven measurement locations which was used in the determination of outdoor day-night sound levels (Ldn).
The day-night sound level is the A-weighted equivalent sound level with a
10 dB penalty applied to sound occurring at nighttime and was developed by the EPA in 1974 as a
descriptor for assessing community noise< 2 ).
Since the 1972 survey was conducted prior to the development of
- Ldn, only residual sound levels were acquired.
The 1980 survey was designed to obtain both residual data for comparison with Supplement 4 2.9-2 February 1983
RBS ER-OLS the 1972 results and statistical data for the Ldn impact assessment.
Whereas the residual sound levels only describe the background sound, the day-night sound level takes into account intrusive noise events as well as background sound.
Supplement 4 2.9-2a February 1983
RBS ER-OLS THIS PAGE INTENTIONALLY BLANK Supplement 4 2.9-2b February 1983
in the range of 6
where there traffic noise..
in detail..
kBS ER-01.S 47 to 59 dBA, with the except.ion of location was an Ldn of 70 dM because of Route 964 Section 6.. 7 describes the survey methodology Since the measured residual sound levels in the 1980 survey were essentially the same as the corrected residual levels of the 1972 survey, it can be concluded that the ambient noise levels in the area have not changed since 1972 and that there are no new major sources in the proximity of the plant, with the exception of the Big Cajun power plant.
2.9-3
Location 1
2 3
5 6
7 8
RBS ER-OLS TABLE 2.9-1 AMBIENT SOUND LEVEL MEASUREMENT LOCATrONS 1972 Survey Location Description Pecan Grove Ori ve St. Francisville Route 965, near radio tower, G.SU property On levee at dirt road, GSU property Po1ice Jury Road, Powe11 Forest Plantaticm The Broad.bents Police Jury Road Starhill Church and Cemetery rntersection of Route 61, Police Jury Road, and Route 966 Route 964, 1.3 km (0.8 mi) north of rl1inois Central Gulf Railroad, 1.6 km (1 mi) south of Route 61 Route 9 64 Papermi.11 1 of 1 1980 Survey Location Description Pecan Grove Drive St. Francisville Route 965, 900 m (3,000 ft) north of radio tower off GSO property River Access Road, 30 m (100 ft) west-southwest of 69-kV transmission line Police Jury Road, Powell Forest Plantation The Broadbents Police Jury Road Starhill Church and Cerretery Intersection of Route 61, Police Jury Road, and Route 966 Route 964, 1.3 km (0.8 mi) north of Illinois Central Gulf Railroad, 1.6 km
( 1 mi) south of Route 61 None
RBS ER-OLS TABLE 2.9-2 AMBIENI' SOUNI> LEVELS Average Minimum Corrected Sound Levels Sound Levels 1972 survey 1972 survey<*>
Location (dBA)
(dBA) 1 SQ 33 2
SQ 31 3
S2 S3 LIS s
S3 37 6
so 36 7
Q9 39 8
S6 SQ
<*>corrected to remove cricket noise tz>without presence of insect noise (3>Different locations than 1972 survey 1 of 1 Average Minimum Sound Levels 1980 Survey<z>
(dBA) 3Q 39(3)
Q1(3)
LIO 39 "1
LIO No Data
RBS ER-OLS TABLE 2.9-3 STATISTICAL
SUMMARY
DATA 1980 SURVEY Measurement Time Leq Ldn Location Period Date ilitl (dBA)
(dBA) l Night Jan 10 0:15 51 Night Jan 10 3:20 45 51 Day Jan 9
10:39 45 2
Night Jan 10 0:45 42 Night Jan 10 3:00 41 47 Day Jan 9
11:15 41 ( 1 )
3 Night Jan 10 2:30 53 Day Jan 9
14:37 42 ( 1 )
59 4
Night Jan 10 1:00 74< 2 )
Night Jan 10 4:45 52 58 Day Jan 9
15:06 40 ( 1 )
5 Night Jan 10 1:30 41 Night Jan 10 4:25 No Data 47 Day Jan 10 13 :25 40 11 )
6 Night Jan 10 1:45 73 Night Jan 10 4:00 64 70 Day Jan 10 13:35 63 ( 1 )
7 Night Jan 10 2:00 42 Night Jan 10 3:45 41 47 Day Jan 9
15:48 40< 1 )
< 1 >computed c 2 >Traffic passby frequent Supplement 2 l of 1 March 1982
4
- it
~
c J,.~~15a..- New
~~~~~ilj~~~Roads 0
0 SCALE-MILES 2
SCALE-KILOMETERS 4
POSITION DESCRIPTION NUMBER
- l.
PECAN GROVE DRIVE, ST. FRANCISVILLE
- 2.
ROUTE 965_, 900M (3000FT.) NORTH OF RADIO TOWER
- 3.
RIVER ACCESS ROAD, 30M (100 FT.)
WSW OF 69KV TRANSMISSION LINE
- 4.
POLICE JURV ROAD, POWELL FOREST PLANTATION, THE BROADBENTS
- 5.
POLICE JURY ROAD, STAR HILL CHURCH
- 6.
INTERSECTION OF ROUTE 61, POLICE JURY ROAD & ROUTE 966
- 1.
ROUTE 964, 1.3Km. (0.8 Mi,) NORTH OF ILLINOIS CENTRAL GULF RR 6
1972 SURVEY POSITIONS 2,3 & B
+++-H-RAILROAD H
HOSPITAL D
CE META RV c
CHURCH 8
CHURCH AND CEMETARY A
AUDI BON LAKES CAMP RESORT RIVER BENO STATION FIGURE 2.9-1 AMBIENT SOUND LEVEL MEASUREMENT LOCATIONS RIVER BEND STATION ENVIRONMENTAL REPORT -
OLS SUPPLEMENT 4 FEBRUARY 1983
RBS ER-OLS 5.8 SOCIOECONOMIC IMPACTS 5.8.1 Physical 5.8.1. 1 Nonradioactive Gaseous Emissions Economic and social effects of nonradioactive gaseous emissions from plant operation will be negligible since the auxiliary boilers will be electrically operated (i.e., no emissions),
and the fossil-fired diesel generators and diesel fire pumps will be infrequently operated.
Offsite deposition of salt from operation of the cooling towers will be below that which is known to cause injury to plants (Section 5.3.3.2),
and socioeconomic impacts are expected to be insignificant.
Plant operation is not expected to create any meteorological conditions outside the plant boundary that would cause economic or financial loss to the area.
Visual impacts of the station will not be significant, as discussed in Section 3.1.
5.8.1.2 Noise This section identifies the major external noise sources at River Bend Station used to estimate plant operational sound levels at the plant property line and at the 1980 ambient survey locations (Section 2. 9).
Plant and ambient sound levels are combined and presented in Tables 5.8-1 and 5.8-2.
The major external sources of noise from the station are multicell mechanical draft cooling towers, circulating water and service water pump motors, and equipment noise in the turbine hall.
Also considered but determined not to be major contributors were exhaust fans for the turbine building, atmospheric dump valves and vents, and steam generator relief valves and vents.
The sound power levels for each major noise source are given in Table 5.8-3.
Thesel 2 levels are based on a field survey and a utility-sponsored study for the Edison Electric Institute< 1 >.
The sound levels due to plant operation were predicted for the vicinity of the station using a
computerized mathematical mode1< 2 >.
The model determines the distancel 2 from each major source to a series of reference points on a
grid system and, using the octave band sound power levels of each reference grid point and assuming hemispherical radiation and atmospheric absorption at standard conditions, Supplement 2 5.8-1 March 1982
RBS ER-OLS calculates the sound pressure level at each reference point.
The attenuatinq effects of trees, topoqraphy, and Supplement 1 5.8-la March 1982
RBS ER-OLS THIS PAGE INTENTIONALLY BLANK Supplement 1 5.8-lb March 1982
2 I RBS ER-OLS meteorological conditions are Barrier effect provided by onsite noise sources is included for There were no barriers assumed for not included in the model.
buildings to individual minor noise sources only.
the major noise sources.
The EPA-identified level of Ldn = SS dB has been selected for evaluating the community and plant property line noise impacts.
The day-night sound level is the 24-hr A-weighted equivalent sound level with a 10 dB penalty applied to sound occurring at night.
This descriptor was developed by the EPA in 1974 as a method for assessing community noise< 3 >.
The octave band content of the total sound level at the nearest residence (1.2 km/4,000 ft southeast of the plant) and the contribution of each major noise source is given in Table S.8-4.
The cooling towers are the major contributors to the plant noise, since the turbine halls, circulating water pump motors, and service water pump motors do not contribute to the total level at this position.
The projected sound levels during plant operation can be obtained by adding +6 dB to the Leg-values of Fig. S.8-1, which gives the Ldn values.
A comparison of the EPA criteria and Fig. S.8-1 shows that the north to south-southeast quadrants (plant grid North) exceed the EPA-identified level of 49 dBA (SS Ldn) at the property line.
Calculated sound levels in the vicinity of the station are presented in Table S.8-1 and Fig. 5.8-1.
These levels represent the worst case conditions when the noise l s flanking over the trees.
When the calculated levels in several directions along the property line and at measurement locations S and 6
are compared to the EPA-identified level of 49 dBA (SS Ldn),
the identified level is exceeded.
Corrections to plant noise levels for attenuation of sound through absorptive growth were not included in computer model estimations because of the considerable variability in the published values of tree attenuation and in propagation conditions.
During certain meteorol ogical conditions, the noise may flank over the trees.
When the leaves are off the trees during December and January, attenuation may be negligible.
Nevertheless, it is expected that during much of the time a significant amount of noise absorption will 2 I result from the trees<~- 11 >.
The predicted sound levels using a conservatively small amount of tree attenuation are presented in Table 5.8-1.
Supplment 2 S.8-2 March 1982
RBS ER-OLS Tables 5. 8-1 and 5.8-2 represent the calculated sound l evels from the major noise sources only.
The winter condition represents the worst case when the ambient sound level s are at their lowest and plant noise is more noticeable.
The calculated level without tree attenuation represents the intruding noise level from the plant and does not include ambient noise.
The maximum expected increase in the ambient levels is 12 dB or less 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 operation, to confirm estimated 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 from ad valorem taxes for a period of 10 yr after the plant is 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 on 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 l, which become available to the parish after the exemption period
- expires, have been estimated for the first 5 yr following I 2 the exemption period.
The estimated payments appear in Table 5.8-5 and apply only to River Bend Station and do 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 I 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 Supplement 2 5.8-3 March 1982
RBS ER-OLS TABLE 5.8-1 ESTIMATED SOUND LEVELS AT PROPERTY LINE AND AT AMBIENT MEASUREMENT LOCATIONS Property Line Direction<1~
N NNE NE ENE E
w<1>
WNW NW NNW Ambient Measurement Locations< 2 >
1 2
3 4
5 6
1 Calculated Levels Without Trees (dBA Leq) 49 52 56 59 59 55 55 53 46 44 43 43 41 48 28 47 34 42 53 49 29 Calculated Levels With Tree Attenuation (dBA Leg) 38 39 42 44 44 42 42 40 34 33 32 32 30 36 19 35 24 31 40 36 20
< l)Plant boundaries taken with Plant Grid North (360 15 1 -30" west of True North) and are the closest distance within that sector.
WSW and W were not calculated due to the proximity of Big Cajun No. 2, Units 1 and 2, two coal-fired power units due to commence operation in the early 1980s..
<2>Ambient measurement locations shown in Fig. 2.9-1.
1 of 1
Measurement Location< t 1>
1 2
3 4
5 6
1 RBS ER-OLS TABLE 5.8-2 MEASURED AND ESTIMATED SOUND LEVELS IN THE VICINITY OF RIVER BEND STATION Measured Residual calculated Ambient Level Level Maximum Summer Winter without Tree Increase 11972 1980 Attenuation Level 54 34 28 54 39 47 52 41 34 53 40 42 53 39 53 50 41 49 49 40 29
<1>see Fig. 2.9-1.
1 of 1 Expected in Ambient (dBAl 1
9 1
4 12 9
0
RBS ER-OLS TABLE 5.8-3 UNSILENCED SOUND POWER LEVELS OF MAJOR OPERATIONAL NOISE SOCJRCES FOR RIVER BEND STATI ON<& >
Octave Band Center Frequency (Hz'
~iimentrn{NO.}
- 31. 5 63 125 250 500
!fil £Q.QQ
!.Q2.Q.
8000 dBA Mu1ticell mechani cal draft cool ing towers (8) 118 121 121 118 115 111 108 105 97 117 I 1 Turbine halls ( 2)
(turbine-generator-exci ter assembly) 116 122 120 11 5 111 107 101l 96 90 113 Circulating water PUllP motors (8) 86 87 88 88 88 98 88 78 68 99 service water pump drive motors (4) 88 90 92 93 93 98 92 83 75 100
<a >dB reference to 10-u Watts Supplement 2 1 of 1 March 1982
RBS ER-OLS TABLE 5.8-4 CALCULATED SOUND PRESSURE LEVELS OF MAJOR OPERATIONAL NOISE SOURCES AT THE NEAREST RESIDENCE<t,2>
octave Equipment (Nod_
31.5 63 125 Multicell mechanical draft cooling towers (8) 60 60 Turbine halls ( 2)
( 31) 54 Circulating water pump motors ( 8) 28 28 service water pump drive motors (4) 27 28 Total 60 61
<t>dB reference to 0.0002 dynes/cm2
<2*4,000 ft SE of the plant, see Fig. 5.8-1 C3>Sound pressure less than 0 60 53 28 29 61 Band Center Fz::eguenc~ _ _{Hz}
250 500 1000 2000 4000 57 51 45 35 17 44 31 18 (31)
(3) 28 26 34 17 (31) 30 28 31 18 (3t 57 51 45 35 17 1 of 1 8000 dBA (3~
53 (3) 40
( 31) 34 (3~
33 (3) 53
NU,ono +
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ai ' l sl.
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CAL DATUM:
.-v-:s. COAST AND GEODETIC SURVEY
. {1**
~ 'EAN SEA LEVEL AS ESTABLISHED BY 1
~~ ~ :~NCE FROM CENTERLINE REACTOR NO. I
~i !OPERTY BOUND: 3035.15 1
+* 1 >\\~7!_r-**
- .. --*-***=tt ALUES =LEO VALUES+ 6 dB
~JI..... "
1 t~~
i/~ 'ALCULATED LEVELS WITH TREE f
l!:j lUATION SEE TABLE 5.8-1
~~
~!(
~~ -
f
~ l.
ST RESIDENCE AFFECTED
': v
<:l11 ATION NOISE
/'-- *.. -!\\1r
'-,~~
>i ""
!\\ ~1
! 1f1-
-~-:"r 0
o }.
I l!ii 1000 1500 2000 2500 500 FEET
! 111 lti I
/
~
1--- lii*'
j~ '
0 I 00 200 300 400 500 I
I I
I METERS FIGURE 5. 8 -1 STATION SOUND LEVEL CONTOURS (dBA Leq VALUES)
RIVER BEND STATION ENVIRONMENTAL REPORT-OLS SUPPLEMENT 4 FEBRUARY 1983
RBS ER-OLS 6.7 OTHER MONITORING PROGRAMS 6.7.1 Noise 6. 7.1.1 Preoperational Monitoring Proqram Ambient sound surveys were conducted in the vicinity of the River Bend site during June 1972 and January 1980.
The purposes of the surveys were to measure the existing ambient sound levels, to determine local sources of noise, and to identify noise-sensitive areas.
The surveys were conducted during different seasons to include possible seasonal changes in sound propagation characteristics and insect noise.
The ambient sound level data are compared witb predicted station sound levels to evaluate the station noise impact (Section 5.8.1.2).
The first survey was conducted on June 15-16, 1972.
Octave band sound pressure levels and A-weighted sound level measurements were taken between 1: 00 am and 4: 30 am.*
Readings were taken with a precision sound level meter and octave band filter set, and the instrumentation system was calibrated before each measurement.
The ambient A-weighted and octave band sound pressure levels were obtained during lulls in identifiable transient noises.
These data are presented in Section 2.* 9.*
The 1980 ambient survey was conducted on January 9-10 while Unit 1 was under construction.
The purposes of the second survey were to confirm that there had been no major changes in the ambient sound levels, to identify any new noise sources in the vicinity of the site, and to measure the ambient sound levels for use in determining impact.
The noise measurement locations used in the 1972 noise survey were reviewed and
- modified, as explained in section 2.9.
octave band sound pressure level and A-weighted sound level measurements were made between 10:40 am and 3:48 pm on January 9, and between 1:00 am and 5:00 am, and 12:00 pm and 5:00 pm on January 10 at each noise measurement location.
The statistical data were collected to determine the residual (lqo),
mean (L50),
intrusive (L10),
and equivalent
(~q) sound levels (Section 2.9) at all locations between 12:00 am and 5:00 am on January 10 only.
The data acquisition system used a
Bruel & Kjaer (B&K)
Type 4165 1/2-in microphone with a 4-in windscreen mounted on a
tripod at least 10 ft from all reflecting surf aces.
The microphone was connected to a B&K Battery Driven Power
- 6. 7-1
RBS ER-OLS supply Type 2804 with a preamplifier.
see Fig. 6.7-1 for the data acquisition system.
This system was calibrated prior to collecting data at each measurement location using a B&R Calibrator Type 4230.
The battery-driven power supply provided the ambient sound signal simultaneously to a B&~
Precision sound Level Meter, octave Band Analyzer Type 2215, B&K Noise Level Analyzer Type 4426, and NAGRA SJ instrumentation quality tape recorder.
A-weighted sound levels and octave band levels were read directly from the sound level meter; simultaneously, statistical data were being recorded with a noise level analyzer, and the results were automatically printed out on the B&K Alphanumeric Printer Type 2312..
While handheld and statistical data were being obtained, a tape recording of the ambient sound was made simultaneously for further analysis, if required.
All manual sound level readings were taken in the absence of transient noise, such as from vehicles and aircraft, and are considered residual levels..
A summary of the residual sound level data and statistical ambient sound level data taken during this survey is presented in section 2.9.
Throughout the survey, observations were made of the meteorological conditions, including wind speed and direction, wet bulb and dry bulb ambient air temperatures, and general weather conditions.
Weather conditions were favorable for noise measurements; wind was calm, 0-3 mph, occasionally gusting to 8 mph on both days.
The tem~eratures ranged from 55 oF to 69 oF, the relative humidity was about 95 percent, and the skies were overcast.
6.7.1.2 Operational Monitoring Program sound level measurements will be made when River Bend Station - Unit 1 is in operation.
The program will be similar to the two previous site noise surveys.
6.7.2 Air Quality No air* quality monitoring is planned for the operational phase of the plant.
There are no systems at the River Bend site which have a
significant impact on air quality.
Impacts to air quality are discussed in sections 2.8, 3.6, and 5.. 5.
- 6. 7-2