RBG-25845, Radiological Environ Operating Rept,River Bend Station,For Operating Period Jan-Dec 1986
| ML20215J637 | |
| Person / Time | |
|---|---|
| Site: | River Bend  |
| Issue date: | 12/31/1986 |
| From: | Booker J, Conner J, Harrington M GULF STATES UTILITIES CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| RBG-25845, NUDOCS 8705080178 | |
| Download: ML20215J637 (43) | |
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RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT RIVER BEND STATION FOR THE OPERATING PERIOD January 1, 1986 - December 31, 1986 s
Prepared by:
[/ .
Michael A. Hafr~ingtotO Sr. Rad. Environmental Analyst Reviewed by: Approved by:
20Q1 WfktthW 4 ~ 2L)?
- . Jain V. Connor Thomas F. Plunkett Su pvr. - Environmental Services Plant Manager ,.
Y evie s x i A/1llt'l Eddin M. Cargill /'&
Supvr. - Radiological Programs e
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. RIVER BEND STATION RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR 1986 TABLE OF CONTENTS
1.0 INTRODUCTION
................................................. 1 2.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM (REMP) ......... 4 2.1 Purpose / Bases .............................................. '4 2.2- Environmental Radiation Exposure Pathways .................. 4 2.3 Land Us e ' Cen sus fo r 198 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.4 Interlaboratory Comparison Program Results for 1986 . . . . . . . . 5 2.5 Program Exceptions ......................................... 16 3.0 INTERPRETATION OF REMP RESULTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 3.1 Summa ry o f Operational REMP Re sults . . . . . . . . . . . . . . . . . . . . . . . . 19 3.2 Comparison of Operational and Baseline REMP Results ........- 26 3.3 Comparison of REMP Results with Operational Controls . . . .. . . 27 APPENDICES A. Summary of Preoperational REMP (Baseline) Results B. Summary of Observations Related to the Chernobyl Accident i
s 9.
- RIVER BEND STATION RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR 1986 LIST OF FIGURES Page Figure 1. Far-field Radiological Environmental Monitoring Locations ............................ 2 Figure 2. Near-field Radiological Environmental Monitoring Locations ............................ 3 LIST OF TABLES Page Table 1. Radiological Environmental Monitoring Program . . . 6
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Table 2. Results of Land Use Census ...................... 14 Table 3. USEPA Intercomparison (Cross-check) Program Participation Results for 1986 .................. 15 Table 4. Monitoring Program Exceptions in 1986 . . . . . . . . . . . 17 Table 5. Radiological Environmental Monitoring Program Summary.......................................... 20 l
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. RIVER BEND STATION RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR 1986 4
1.0 INTRODUCTION
This Annual Radiological Environmental Operating Report for the period of January 1 through December 31, 1986, is submitted in accor-dance with Technical Specification 6.9.1.7 of Appendix A to River Bend Station License Number NPF-47.
River Bend Station (RBS) is a 936 MWe General Electric boiling water reactor located in West Feliciana Parish, Louisiana, 4.1 km south-east of St. Francisville (Figure 1). Waste heat from RBS is dissipated via a closed cycle system using four mechanical draf t cooling towers which draw makeup water from the Mississippi River, 3.3 (air) km to the west. Blowdown from the normal cooling tower system dilutes low-level liquid radioactive waste and is discharged to the Mississippi River through a 4.4-km buried pipe located downstream of the intake structure (Fig. 2). Gaseous radioactive effluents are released through the Main Plant Exhaust Duct, the Fuel Building Exhaust Duct, and the Radwaste Building Exhaust Duct.
The area within a 16-km radius of RBS includes substantial portions of West Feliciana, East Feliciana, and Pointe Coupee parishes, as well as small portions of East and West Baton Rouge parishes. Most of the land in this area is devoted, in about equal proportions, to forests and agriculture (pasture, various crops). Wetlands, streams / lakes, and urban / improved lands comprise the remainder of the immediate vicinity of the plant. Besides St. Francisv111e (4.1 km northwest), human popula-tion centers near RBS are New Roads (10 km southwest) and Jackson (12 km northeast) . Industrial facilities in the immediate vicinity of RBS are Lam ~oert Redi-Mix Company (1.8 km north-northeast); Crown-Zellerbach Paper Mill (5 km south); Big Cajun No. 2 Power Station (5 km southwest);
and the Corps of Engineers concrete casting yard (5 km west).
The area within an 80-km radius of RBS contains portions or all of 19 Louisiana parishes and five Mississippi counties. This area has generally the same makeup as that of the immediate vicinity of RBS, al-though wetlands, agricultural lauds, and urban / improved lands are rela-tively more extensive (at the expense of forested lands) in the south-western and southeastern quadrants. Baton Rouge, centered at about 38 km southeast, is the only large city in the general vicinity of RBS.
During 1986, radiological environmental monitoring in the vicinity of RBS was performed by the Gulf States Utilities Company (GSU) Environ-mental Services Group, with support from the Plant Staf f Radiological Programs Section and an of fsite contractor, Eberline Analytical Ser-vices.
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o RIVER BEND STATION RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR 1986 2.0 RADIOLOGICAL ENVIR0_NMENTAL MONITORING PROGRAM (REMP) 2.1 Purpose / Bases The Radiological Environmental Monitoring Program (REMP) was esta-blished to provide representative measurements of radiation and of radi-oactive materials, resulting from RBS operation, in those exposure path-ways and for those radionuclides that lead to the highest potential ex-posures of members of the public. The REMP implementsSection IV.B.2 of Appendix I to 10CFR50 and thereby supplements the radioactive effluent monitoring program by verifying that the measurable concentrations of radioactive materials and levels of radiation are not higher than ex-pected on the basis of the effluent measurements and the modeling of the environmental exposure pathways.
The REMP applies the concepts of indicator-control and preopera-tional-operational intercomparisons to establish the adequacy of envi-ronmental levels and resultant human radiation doses. In addition to _
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10CFR50, Appendix I, the program is based on guidance provided in the Nuclear Regulatory Commission's Radiological Branch Technical Position, Revision 1, November 1979, as well as Regulatory Guides 4.1 and 4.15. =
2.2 Environmental Radiation Exposure Pathways Elements of the REMP monitor indications of the impacts of gaseous (airborne) and liquid effluents released from River Bend Station. The specific methods used in monitoring the pathways by which these efflu-ents could lead to human exposure, based un existing demographic infor-mation, are:
HUMAN EXPOSURE PATHWAYS (A) Airborne Pathway Monitoring Media Immersion Dose Air Samples (Particulates and Radiciodines)
Ingestion (Internal) Dose Vegetation / Food Crop Samples Milk Samples Air Samples (B) Direct Exposure Pathway Monitoring Media External Dose Thermoluminescence Dosimetry (TLD) Area Monitors (C) Waterborne Pathway Monitoring Media Ingestion (Internal) Dose Surface Water Samples Groundwater Samples Drinking Water Samples Fish / Invertebrate Samples Shoreline Sediment Samples 4
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.. RIVER BEND STATION RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR 1986 (C) Waterborne Pathway (cont.) Monitoring Media Immersion (External) Dose Surface Water Samples Shoreline Sediment Samples Site-related dispersion characteristics, demography, hydrology, land use, anticipated source terms, and the exposure pathways outlined above were considered in the selection of the sample media, sampling and analysis frequencies, sampling / measurement locations, and types of anal-yses. These criteria were used to establish both the preoperational and operational phases of the REMP.
The program that evolved during the preoperational (baseline) moni-toring phase, incorporating all of the elements in the RBS Technical Specifications (3/4.12.1, 3/3.12.2, 3/4.12.3) plus special study cri-teria, is illustrated in Table 1 and Figures 1 and 2.
2.3 Land Use Census for 1986 The annual land use census was conducted from July 30 through Au-gust 30, 1986, in accordance with RBS Technical Specification 3/4.12.2.
Table 2 summarizes the results and notes changes in nearest receptor locations from those identified in the Radiological Environmental Operating Report for 1985.
As in previous years, the 1986 census identified residences within 8 km of the reactor containment in all sectors except L (SW). Distance to the nearest residence in Sector F (ESE) increased from 1.4 to 3.4 km.
Gardens were identified within 8 km of RBS in all sectors except L (SW) and N (W) . Distances to the nearest gardens in sectors E (E), H (SSE),
and M (WSW) decreased. The gardens identified in sectors P (WNW) and Q (NW) are the onsite gardens established in the sectors with the highest calculated annual average ground-level D/Q. These gardens are REMP in-dicator locations for broadleaf vegetation (Table 1, Fig. 2).
No dairy animals were found within 8 km of RBS during the 1986 cen-sus. The McKowen Dairy (Location MF2, Table 1, Fig. 1) suspended opera-tion on July 1, 1986; however, it was used for REMP sampling / analyses through June. Historically, there had never been enough dairy sites to accommodate the minimum RBS Technical Specification requirements for analyses of milk (3 locations within 5 km), so monitoring of broadleaf vegetation had been performed from the outset. Loss of the dairy there-fore did not require a formal change in the REMP.
2.4 Interlaboratory Comparison Program Results for 1986 The Environmental Services Group participated in the U. S. Environ-mental Protection Agency (USEPA) Laboratory Intercomparison Program dur-ing 1986 in accordance with RBS Technical Specification 3/4.12.3. RBS results (Table 3) were near the "known" value, or within the USEPA range of expected laboratory precision for 81 percent of the onalyses.
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RIVER BEND STATION -
RADIGIACICAL ENVIROI0 ENTAL OPERATING REPORT POR 1986 ,.
TABLE 1 RADIOLOGICAL EIIVIROISEENTAL MONITORINC PROGRAN
- (Page 1 of 8)
- Exposure Pathway Sample Point Description, Sampling and Type and Frequency-and/or Sample Distance, and Direction Collection Frequency of Analysis Airborne Particulates Samples from * ' estions:
and Radioiodines INDICATOR STATIONS AA1. River Bend Training- Continuous air sampler Charcoal cartridge:
Center; 1.7 km N. with filter collection analysis weekly for-weekly or as required by radioiodine.
dust loading,.whichever Particulate sampler is more frequent. gross beta activity following filter changes; composite for gasuna isotopic quarterly.
ARI. River Bend Station North Access Road at Cate m #3; 0.8 km NNW, API. Near River Bend Station Onsite Carden #13 0.9 km WNW.
AQS2. St. Francis Substation on US Hwy..(Bus.) 61 in St.
Francisville 5.8 km NW (Community Location).
CONTROL AND SPECIAL STATIONS (1)
ALC. Parlange Power Center " "-
in Oscar: 20 km SW (Control).
ABl. River Bend Station iron yard are.ag 0.5 km NNE. (1, 2)
AKS, River Bend Station " "
River Access Road; 2.8 km SSW. (1, 2)-
ACS. CSU Service Center- " "
compound in Zachary; 17 km SE, (1, 2)
AHS. Roof of CSU Service Office " "
Building North Blvd., Beton Rouge; 40 km SSE.,(1, 2)
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-. . 3 RIVER BEND STATION RADIOIDCICAL ENVIR0letENTAL OPERATING REPORT FOR 1986 ,
TABLE I RADIOIhCICAL ENVIROId. ENTAL MONITORING PROGRAM (Page 2 of 8)
Exposure athway Sample Point Description. Sampling and- 'ype and Frequency and/or Sample Distance, and Direction Collection Frequency of Analysis Direction Radiation Measurements from 44 locations:
INDICAIOR STATIONS TAl. River Bend Training Thermoluminescence, ca-a dose monthly Center; 1.7 km N. dosimeters (TLDs); and quarterly. (3) deployment / retrieval monthly and quarterly. (3)
TA2. CSU utility pole #246-at Jct of LA Hwy.10 and West Feliciana Parish Road (WF) 2 in Elm Park; 8 km N.
TBl. River Bend Station iron yard area; 0.5 km NNE.
u TB2. Stub pole at Jct. LA Hwy.
%5 and Audubon Lane (WF 17);
5 km NNE.
TC1. Stub pole at Jct. US Hwy.
61 and Old Highway 61; 1.7 km NE.
TC2. Stub pole along LA Hwy. 966 0.6 km S. of Jct. LA Huys. 966 and 965; 7 km NE.
TDI. . Stub' pole along WF 7. 150 m S. of' Jct. WF 7 and US Swy. 61; 1.6 km ENE.
TD2.. Stub pole along LA Hwy. 966 4 km S. of Jct. LA Hwys. 966 and 965; 6.3 km ENE.
TEl. Stub pole along WF 7. 1 km S. of Jct. WP 7 and US Hwy. 61; 1.3 km E.
'TE2. Gravel Power Center on LA Hwy. 68, 2 km N. of Jct. LA Huys.
68 and 964; 10 km E.
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RIVER BEND STATION ,
RADIO 1DGICAL ENVIROBBIENTAL OPERATING REPORT FOR 1986 ,
TABLE 1.
RADIOLOGICAL ENVIROIStENTAL MONITORING PROGRAM
'(Page 3 of 8)
Exposure Pathway- ' Sample Point Deacription. . Sampling and Type and Frequency _
and/or Saaple Distance, and Direction Collection Frequency of Analysis Direct Radiation TFl. Stub pole along WF 7 ' . Thermoluminescence t h a dose monthly (continued) 1.6 km S. of Jct. WF 7 and dosimeters (TLDs); and quarterly. (3)
US Hwy. 61; 1.3 km ESE. deployment / retrieval monthly and quarterly. (3)'
TF2. McKoven Dairy on LA Hwy.
'954, 0.6 km N. of Jct. LA Hwy.
954 and US Hwy, 61; 6 km ESE.
TGl. Stub pole along WF 7 2 km S. of Jct. WF 7 and US Hwy. 61; 1.6 km SE.
TG2. Telephone pole at gate to Marathon Tank Farm on US Hwy.
61 near Delombre; 7.5.km SE.
- THl. Stub pole at Illinois " "
Central Gulf RR crossing of.
WF 7 (near Grants Bayou);
~1.7 km SSE.
TH2. First, telephone pole on LA Hwy. %4 N. of entrance to Crown-Ze11erbach paper mill; 5.5 km SSE.
TJ1. Stub pole near River Bend " "
Station Gate f23 on Powell Station Road (LA Hwy. 965); 1.5 km S.
TJ2. Large tree along River Road. " "
100 m N..of Crown-Ze11erbach intake structure; 5.8 km S.
TKl. GSU utility. pole #L10178 on Powell Station Road (LA Hwy. 965),
20 m S. of River Bend Station River Access Road;.0.9 km SSW.
TK2. Stub pole at Jet.' LA Hwys. " "
414 and 415; 8 km SSW.
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RIVER BEND STATION RADIOLOGICAL ENVIRONMENTAL OPERATINC REPORT IUR 1986 ,
TABLE 1 RAD 1014CICAL ENVIR0tttENTAL MONITORINC PROGRAM (Paige 4 of 8) '
Exposure Pathway Sample Point Description. Ssapling and Type and Frequency and/or Sample Distance, and Direction Collection Frequency of Analysis Direct Radiation TLI. Second utility pole on The'rmoluminscence Casma dose monthly (continued). Powell Station Road (LA Hwy. dosimeters (TLDs); and quarterly. (3)
%5) S. of Illinois Central deployment / retrieval Culf RR crossing;.1.0 km SW. monthly and quarterly. (3)
TL2. Second utility pole along LA Hwy. 415 E. of Louisiana and Arkansas RR crossing (naar Patin's Dike); 9.5 km SW.
TNI. First utility pole on Powell Station Road (LA Hwy.
965) N. of Illinois Central Culf RR crossing; 0.9 km WSW.
" =
TM2. Utility pole along LA Hwy. 981, about 3 km S. of Jct.
LA Hwys. 981 and 10; 4.2 km WSW.
TNI. Utility pole along Powell Station Road (LA Hwy. 965),
between Riv3r Bend Station Cates
- 13 and #14; 0.9 km W.
TN2. Utility pole with electrical meter near west bank ferry landing (LA Hwy. 10); 6 km W.
TPl. Near River Bend Station Onsite Carden #1; 0.9 km WNW.
TP2. Stub pole about 1.5 km N.
of Illinois Central Culf RR trestle on Tunica Street, western -
outskirts of St. Francisville; 7.3 km WNW.
TQ1. CSU property sign along Powell Station Road (LA Hwy. 965), s about 1 km N. of River Bend Station
. North Access Road; 1.4 km NW.
TQ2. CSU pole at Jct. of North Conumerce and American Beauty Streets, St. Francisville; 6.9 km NW.
' RIVER BEND STATION RADIOLOGICAL ENVIR0l#fENTAL OPERATING REPORT FOR 1986 , ,
TABLE 1 -
RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRA1 (Page 5 of 8)
Exposure Pathway Sample Point Description. . Sampling and Type and Frequency
{
and/or Sample Distance, and Direction Collection Frequency of Analysis Direct Radiation TRI. River Bend Station Thermoluminescence Camma dose monthly (continued) North Access Road at Cate dosimeters (TLDs); and quarterly. (3)
- 3; 0.8 km NNW. deployment / retrieval' monthly and quarterly. (3)
TR2. Stub pole along WF 2 at Jacock Road, about 1.8 km E.'of Jct. WF 2 and US Hwy. 61; 8 km NNW.
CONTROL AND SPECIAL STATIONS (1)
TAC. Telephone pole along US Hwy. 61 about 200 m N. of Hamilton Station Water Tower. near Wakefield; 18 km N (Control).
O " "
TEC. Stub pole at Jct. of LA Hwy.
4 955 and Midway Road. 4.8 km N. of
. Jct. LA Hwys. 955 and 964; 16 km E.
-(1, 2)
TLC. Parlange Power Center in Oscar; 20 km SW (Control).
TQSt. Behind Pentecostal Church (opposite West Feliciana Hospital) near Jct. US Hwy. 61 and Ferdinand Street; 4 km NW. (1).
TQS2. St. Francis Substation on US Hwy. (Bus.) 61 in St.
Francisv111e; 5.8 km NW. (1)
, TLS. Utility pole near False River Academy sign at edge of New Roads; 9.9 km SW. .(1)
TCS. Utility pole at gate to East h uisiana State Hospital i in Jackson; 12.3 km NE. (1) l
RIVER BEND STATION RADIOIACICAL ENVIRONMENTAL OPERATINC REPORT FOR 1986 ,
TABLE 1 RADIOIDCICAL El 'IRONMENTAL MONITORING PROGRAM (Page 6 of 8)
Exposure Pathway Sample Point Description, Sampling and Type and Frequency and/or Sample Distance. and Direction Collection Frequency of Analysis Direct Radiation TGS. CSU Service Center Ther'uoluminescence ca= = dose monthly (continued) compound in Zachary; 17 km SE. dosimeters (TLDs); and quarterly. (3)
(1) deployment / retrieval monthly and quarterly. (3)
THS. Roof of CSU Service Office Beilding North Blvd., Baton Rouge; 40 km SSE. (1)
TES. River B-and Station River Access Road; 2.8 km SSW. (1, 2)
TQS3. Utility pole at Louisiana State Penitentiary dairy, near Angola; 35 km NW. (1, 2)
" TRS. Stub pole at Jct. of WF 2 and US Hwy. 61, near Bains (West Feliciona High School); 9.2 km NNW. (1. 2)
Watsrborne SURFACE WATER (4)
SWU. Miss'ssippi i River about 4 km Weekly grabs composited Monthly composite:
upstream from the plant liquid over monthly and gassa isotopic and
! discharge outfall, near LA Hwy 10 quarterly periods, gross beta analyses. (5)
! ferry crossing. Quarterly compositet i tritium analysis.
4 SWD. Mississippi River about 4 km downstream from the plant liquid discharge outfall, near paper mill.
Discharge Line. At blowdown control Hourly grabs composited structure along River Access Road, monthly and quarterly.
DRINKING WATER (6)
Nearest downstream water supply. Weekly grabs composited People's Water Service Company in over monthly and Donaldsonville; 138 river km quarterly periods.
downstream from the plant liquid discharge outfall.
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RIVER BEND STATION RADIOIDGICAL ENVIRONMENTAL OPERATING REPORT FOR 1986 TABLE 1 RADIOLOGICAL y.N"IRONMENTAL MONITORING PROGRAM (Page 7 of d) ,
Exposure Pathway Sample Point Description, Sampling and Type and Frequency and/or Sample Distance, and Direction Collection Frequerew of Analysis Waterborne CROUNDt'ATER (continued)
WD. Upland Terrace Aquifer Quarterly grab. Cross beta, gamma well downgradient from plant, isotopic and tritium about 470 m SW. analyses quarterly. (5)
WU. Upland Terrace Aquifer well upgradicat from plant, about 470 m NNE (Control).
SHORELINE SEDIMEh"I SED. East shore of Mississippi Semiannual grab. Camma isotopic analysis River about 4 km downstream from semiannually.
plant, near Crown-Ze11erbach paper mill.
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" Ingestion MILK (7)
MF2. McKoven Dairy on LA Hwy. Semimonthly when animale Camma isotopic and 954, 0.6 km N. of Jet. LA Hwy. on pasture; monthly at I-131 analyses 954 and US Hwy. 61; 6 kw LSE other times. semimonthly or monthly.
(nearest source of milk for human consumption).
MQC. Louisic.na Stace Penitentiary near Angola; 35 km NW (Control).
FISH AND INVFRTEBRATES FD. One sample of each of Semiannually or Gamma isotopic analysis three commercially and/or seasonally when on edible portions semi-recreationally important species available. annually or seasonally, from downstream area influenced by plant discharge. (8)
FU. One sasple of each of three commercially and/or recreationally important species from upstream area not influenced by pl-nt discharge (Control). (8)
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RIVER BEND STATION -
. RADIOLOGICAL ENVIROISENTAL OPERATINC REPORT FOR 1986 . ,
-TABLE 1 '
RADIOLOGICAL ENVIROISENTAL MONITORING PROGRAM (Page 8 of 8)
- Exposure Pathway Sample Point Description., Sampling and Type and Prequency~
and/or Sample Distance, and Direction- Collection Frequency of Analysis Ingestion : PRODUCE (9) '
(continued) .. .
01/G2. h o samplac of each of ; Monthly during growing .Camma isotopic and I-131 analyses monthly, three different kinds of leafy season.
vegetables from onsite gardens near the site boundary in areas cf highest calculated annu.1 average ground-level D/Qg 1 km '
WNW and 1.3 km NW.
CQC. One sample of each of three " "
different kinds of leafy vegetables from LA State Penitentiary at" Angolag 35 km NW (Control).
U NOTES:
(1) For purposes of data summary, comparisons, and discussion, the sampling locations designated as "Special Interest" are treated as indicator stations if they are within 16 km of RBS and control stations if they are beyond 16 km.
(2) Sample /measurerent location not required by RBS Technical Specifications (not identified in 019t).
(3) Sampling and/or analysis frequency greater than required by RBS Technical Specifications and OD'3f.
(4) The upstream (control) sample is taken at 'a distance beyond influence of ,the plant discharge. The downstream (indicator) sample is taken in an area beyond but near the mixing zone.
(5) Cross beta analysis not required by RBS Technical Specifications and ODCM.
(6) Drinking water sampling / analyses not required by RBS Technical Specifications and ODCM. (No drinking water pathusy exists due to extreme distance of nearest intake.). The upstream surface water sampling location (SWU) is used as a:
" control" for. drinking water analyses comparisons.
(7) If milk-prohciv animals become available within a 5-km radius of the plant, up to' 3 samples from these animals will' be analyzed in lieu of the leafy vegetables from onsite gardens -in high dose-potential areas (see Note 9).
(8) Preferred species are river. shrimp, blue catfish, and freshwater drung if catfish and drum are unavailable, other .
edible species may be substituted.
(9) No irrigation pathway exists due to the extreme distance of nearest domestic water intake (see Note' 6); leafy vegetables are sampled / analyzed because of limited availability of milk samples (see Note .7).
RIVER BEND STATION RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR 1986 TABLE 2 RESULTS OF LAND USE CENSUS Neares t Range Nearest Range Nearest Range Sector Residence (Km) Garden (Km) Dairy (Km)
A (N) Jones 1.8 Toney 2.0 - -
B (NNE) Dreher 1.6 Harvey 1.8 - -
C (NE) Magee 1.5 Magee 1.5 - -
D (ENE) Miller 1.4 Daniel 1.6 - -
E (E) Carver 2.2 Carver 2.2 - -
F (ESE) Shelton 3.4 Bickham 3.5 - -
JG (SE) Mills 6.6 Mills 6.6 - -
H (SSE) Koffman 1.7 Koffman 1.7 - -
J (S) Bliss 1.8 Bliss 1.8 - -
K (SSW) Guillory 7.4 Guillory 7.4 - -
L (SW) - - - - - -
3 M (WSW) Major 4.2 Major 4.2 - -
N (W) Lacost 6.1 - - - -
P (WNW) Dwyer 4.5 GSU #1 1.0 - -
'Q (NW) Hurt 1.3 GSU #2 1.3 - -
R (NNW) Wallace 1.6 Monroe 3.0 - -
1 The 1986 receptor location was farther than the receptor location listed in the 1985 REMP Report.
2 The 1986 receptor changed location with no change in the range since the 1985 REMP Report.
3 The 1986 receptor location was nearer than the receptor location listed in the 1985 REMP Report.
14
_)
RIVER BEND STATION RADIOIDGICAL ENVIRONMENTAL OPERATING REPORT FOR 1986 ,
TABLE 3 USEPA INTERCOMPARISON (CROSS-CHECK) PROGRAM PARTICIPATION RESULTS ,
SAMPLE TYPE AVERACE RESULT (Units) DATE ANALYSIS USEPA "KNOJN" VALUE" ' RIVER BEND VALUE (All Participants)
AIR FILTER (pci/ filter) 4/25/86 Beta 4725 66.7 51.3626.18 4/25/86 Cs-137 1015 '13.7 11.4822.13-9/12/86 Beta 66t5 83.7 70.5918.07 9/12/86 Cs-137 2215 24.7 24.1223.63 FOOD (pC1/kg) 1/31/86 Cs-137 1525 17.3 16.5221.80 ,
9/25/86 . I-131 3026 31.0- '28.2413.03 - j 9/25/86 Cs-137 2025 22.0 21.4912.55 MILK (pci/ liter) 6/27/86 I-131 4116 48.3 43.94t4.49 -
6/27/86 Cs-137 3125 43.7 36.55t3.11 WATER
~
" (pC1/ liter) 1/24/86 Beta 715 6.7 7.2011.83 2/14/86 H-3 52272523 5309* 5105 340 4/4/86 I-131 916 9.0 8.6221.86 4/10/86 Beta 3515 31.0 32.46t4.51 4/20/86 Co 1025 10.3 10.4722.00 4/20/86 Cs-134 515 5.0 5.3111.32 4/20/86 Cs-137 525 6.0 5.5821.17 5/23/86 Beta 1515' 15.0 14.75t2.83 6/13/86 H-3 31251360 3277 30521347 7/18/86 Beta 1825 21.3 17.85t2.68 8/8/86 I-131 4516 44.0 41.6416.15 9/19/86 Beta 815 12.7 9.53t2.82 10/17/86 H-3 59732597 5337 5694t406 10/22/86 Beta 5115_ 34.0* 46.6316.08 10/22/86 Co-60 24t5 26.0* 24.4522.23 10/22/86 Cs-134 1215 12.5" 11.3011.86 10/22/86 Cs-137 815 12.0" 8.83tl.89 11/21/86 Beta 2025 22.7 20.44t3.21 NOTES:
(a) USEPA "known" values are listed with a range reflecting " expected laboratory precision."
(b) The grand average of all participants' results (excluding outliers) is listed with the experimental (caleclated) sigma for all laboratories.
(c) Analyses perfctmed but results not reported to USEPA (thus not included in participants' average).
. RIVER BEND STATION RADIOLOGICAL ENVIRONMENTAL OPERATINJ REPORT FOR 1986 RBS analyses of two USEPA air filters tended to over-estimate gross beta activity (as was also the case among participants in general). The beta-counting instrument underwent service, including replacement of the scintillation (phoswich) detector, in August, 1986. Gross beta results for water closely agreed with the "known" values except for that of 10/22/86, which appeared attributable to technician error. Inasmuch as no cross-check air filters have been provided since September,1986, the adequacy of corrective measures remains to be determined.
Results of RBS analyses for Iodine-131 and Cesium-137 in milk, per-formed by gamma ray spectroscopy, were biased high because the sample volume was incorrectly measured and because the counting efficiency de-termined for Cs-137 was too low. The latter problem was corrected by fabrication of a calibration standard closer in density to that of dried milk.
2.5 Program Exceptions Certain samples and analyses were inadvertently omitted _or unavoid-ably altered during the 1986 operating period. These exceptions and the reasons for the omissions / alterations are delineated in Table 4 in ac-cordance with Technical Specification requirements. Corrective actions and impacts on program quality are discussed below.
A mechanical problem resulted in an uncertain volume from the con-trol air sampler (Location ALC) during one week. The problem was cor-rected soon after discovery and its impacts were mitigated by the exis-tence of two "Special Interest" samplers beyond 16 km which provided further control data. A storm-related power outage briefly impacted three of the required indicate- air samplers (Locations AA1, API, AR1) in early August, but appeared have been an isolated incident of insignificant impact on progrm tuality.
One quarterly thermoluminescence dosimeter (TLD) was lost due to vandalism and was replaced at the beginning of the next measurement period. Inasmuch as this was the only TLD lost auong the 40 required locations, it did not significantly impact program quality.
Slight damage eo tubing in the automatic compositing sampler in the Discharge Line led to uncertainty about the volume of 22 hourly ali-quots in the first week of 1986. The tubing was replaced and the ac-cumulated volume (which appeared close to the expected amount) was re-tained, as the incident was not deemed to have had a significant impact on program quality. At the beginning of August, 1986, 110 of 168 possible aliquots for a week were lost due to clogged tubing in the Discharge Line sampler. The frequency of tube inspection / replacement was increased from quarterly to weekly after this incident, which re-selted in lower than normal overall sample volumes for the monthly gamma isotopic and quarterly tritium analyses of this medium. In October, 1956, about half of the Discharge Line aliquots for one week were not obtained due to an apparent disruption of the sampler microprocessor program. Personnel were instructed to exercise greater care in handling 16
. m - _ - _ - . ~ . . .
' - *^
RIVER BEND STATION 1 RADIOLOGICAL E!;VIRONMENTAL OPERATING REPORT FOR 1986 ,
TABLE'4 MONITORING PROGRAM EXCEPTIONS (Page 1.of.2)
Sample Type Period Location Exception / Reason Air Particulates and 3/10/86-3/17/86 . ABI ,
- About 75% of normal weekly sample. volume >
Radioiodines not obtained due to apparent electrical:
-problem.
3/31/86-4/7/86 ALC' Semple volume uncertain due to compres-sor problem.
5/19/86-6/2/86 AKS
- Samples for two (2) weeks not obtained due to mechanical problems.
6/23/86-7/14/86 AB1
- Sample volumes uncertain due to failure
'of elapsed time meter on sampler.
7/28/86-8/4/86 AA1 .Eatinated 3.5% of normal weekly sample volume not obtained due to power outage.
7/28/86-8/4/86 ARI Estimated 3.5% of normal weekly sample.
volume not obtained due to power outage.
[
7/28/86-8/4/86 API Estimated 3.5% of normal weekly sample volume not obtained due to power outage.
7/28/86-8/4/86 AB1
- Estimated 3.5% of normal weekly sample volume not obtained due to power outage.
7/28/86-8/4/86 AKS
- Estimated 3.5% of normal weekly sample '..
volume not obtained due to power outage.
"
- Sample volume uncertain due to power 8/4/86-8/11/86 AB1 outage and inoperative elapsed time meter on sampler.
9/15/86-9/22/86. AKS
- Estimated 14% of normal weekly sample volume not obtained due to power outage.
Direct Radiation (TLD) 2nd Quarter TQ1 TLD lost due.to vandalism.
February TQ1 *TLD lost due to vandalism.
en m. +m% :
et
+.
RIVER BEND STATION RADIOIDGICAL ENVIRONMENTAL OPERATING REPORT FOR 1986 ,
TABLE 4 MONITORING PROGRAM EXCEPTIONS (Page 2 of 2)
Sample Type Period location Exception / Reason a Water (Composite) 1/1/86-1/7/86 Discharge Line Volume of twenty-two (22) hourly ali-quots (of 720 possible) unverified due to damaged tubing in automatic sampler, f
7/29/86-8/4/86 Discharge Line One hundred twenty (120) hourly aliquots (of 168 for a week) lost due to faulty tubing in automatic sampler.
10/14/86-10/21/86 Discharge Line Seventy-seven (77) hourly aliquots (of 168 for a week) lost due to probable inadvertent disruption of automatic sampler microprocessor program.
" July Donaldsonv111e' *Two (2) or three (3) weekly grab samples not included in composite due to person-nel error.
g Milk July through MP2 Milk samples not available due to dairy closure, December j Milk July through MQC Milk sampling suspended due to unavail-December ability of indicator location.
1
]
Broadleaf Vegetation . August GQC Only two (2) of three (3) samples col-j lected due to limited availability.
J l
i
-* RIVER BEND STATION RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR 1986 of . the sensitive equipment. This incident resulted in slightly lower than normal overall sample volumes for the monthly gamma isotopic and quarterly tritium analyses.
. Suspension of milk sampling / analyses during the second half of 1986 was unavoidable and did not significantly -impact program quality as dis-cussed above in Section 2.3.
Limited variety in the crops available at the state penitentiary (GQC) during August resulted in- failure to obtain one out of 36 required control samples of broadleaf vegetation for 1986. This did not signifi-cantly impact program quality.
3.0 INTERPRETATION OF REMP RESULTS 3.1 Summary of Operational REMP Results The Radiological Environmental Monitoring Program for 1986 was con-ducted primarily by the RBS Environmental Services Group, with support from the Plant Staff Radiological Programs Section in air sampler main-
-tenance/ calibration and reading / annealing of TLDs. Use of an offsite contractor laboratory for REMP sample analyses was phased out early in
-1986.
Monitoring results for the exposure pathways are summarized in Table 5, from which measured activities of the naturally occurring daughters of uranium and thorium are excluded. The 1986 REMP results reflect the impacts of fallout from the accident which occurred in Cher-nobyl, Russia, in late April. Further details of.the Chernobyl impacts, as quantified through intensification of RBS REMP activities, are pro-vided in Appendix B.
3.1.1 Airborne Exposure Pathway - Measurements of radioiodine and other gamma emitters were all below their respective Lower Limits of De-tection (LLDs) except during the last week of May and the first week of June, when airborne contamination attributable to the Chernobyl accident was detected at all indicator and control locations. Gross beta activi-ties averaged 0.03 pCi/ cubic meter at both indicator and control sta-tions.
3.1.7 Direct Exposure Pathway - The monthly average gamma ray ex-posure for indicator and control locations was 3.76 mR total and 3.80 mR total, respectively. Quarterly exposures averaged 11.85 mR total at in-dicator locations and 12.05 mR total at control locations.
3.1.3 Waterborne Exposure Pathway - No gamma emitters were mea-sured in water at levels approaching the Technical Specification LLDs, although Cobalt-58 and Co-60 were measured in a few mcnthly composite samples from the Discharge Line at concentrations between 3 and 7 pCi/ liter. Gross beta activities in surface water averaged 10.1 pCi/ liter in the Discharge Line and slightly less than 6 pCi/ liter at 19
TABLE 5 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM SUMFARY (Page 1 of 6) ,
River Bend Station Docket Number: 50-458 West Feliciana Parish, Louisiana Reporting Period: 1/1/86 - 12/31/86 l Medium or Type and Lower Limit i All Indicator i Location with Highest Control i Number of l l Pathway Sampled (Unit of Total Number of Analyses of g Detection l
l Stations Mean (f)2 i
l Name A"""*l M**"
Mean (f)2 L cations Mean (f)y l' Nonroutine Reported !
i L
Measurement) Performed (LLD) i Pange Dist./Dir. Range Range Results l 3 0.031 (52/52)! l l Air Particulate Gross Beta ! 0.01 0.028 (309/312)' AGS 0.029 0 l (464) ! 0.005 - 0.125 17 km SE 0.005 - 0.104l (155/156) '
! l 3 ' '
. 0.005 - ! s (pci/m ) ,
O 124 Be-7 'None Pequired: '0.28 (20/216) AR1 0.035 (3/52)l 0.27 6 !
(324) 0.11 - 0.46 0.8 km NNW 0.25 - 0.46 l (11/108) l 0.16 - 0.42 ! i I
e ! l K-40 None Required 0.48 (33/216) l A032 0.051 (6/52) 0.47 0 1 (324) 0.04 - 0.70 l S.8 km NW 0.31 - 0.70 (27/108) g 0.08 - 0.65 Cs-134 0.05 All (LLD All <LLD 0 l (324)
I S$ Cs-137 0.06 All <LLD All (LLD 0 l
(324)
Air Radioiodine I-131 0.07 0.09 (12/312) AHS ' O.11 (2/52) 0.10 (6/15614 0 3
(467) 0.07 - 0.12 40 km SSE 0.10 - 0.11 ! 0.09 - 0.11 1 l
(pCi/m 3 = _: -____- -
Direct (TLD) '
Gamma 3.76 (455/456) TM2 4.50 (12/12) 3.80 (71/72)' O Monthly 1.30 - 9.70 4.2 km WSW 3.30 - 5.74 1.80 - 6.25 (mR Total) (526) 1 Gamma 11.85 (151/152) TM2 j 14.13 (4/4) 12.05 0 )
Quarterly 7.60 - 16.10 4.2 km WSW '13.20 - 15.40' (22/24) '
(176) l 9.40 - 14.90
-- _ _- __= -- -- == ------------
Surface Water H-3 2000 2032 (8/8) Discharge 2366 (4/4) 1582 (4/4) 0 (12) 1420 - 2688 Line 2016 - 2688 1363 - 1780 l (pci/ liter) . (
Mn-54 15 l All <LLD l All <LLD 0 (36)
I Co-58 15 5.76 (3/24) Discharge 5.76 (3/12) All <LLD 0 . J (36) 3.46 - 6.96 Line 3.46 - 6.96 j l
Fe-59 30 All <LLD i' All <LLD 0 !
l (36)
f TABLE 5 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM
SUMMARY
(Page 2 of 6) .
River Bend Station Docket Number: 50-458 West Feliciana Parish, Louisiana Reporting Period: 1/1/86 - 12/31/86 i Medium or Type and Lower Limit All Indicator Location with Highest i Control Number of l Pathway Sampled Total Number of Stations Annual Mean ' Locations Nonroutine !
(Unit of of Analyses Detection Mean (f)2 Name Mean (f) 2 Mean (f)2 Reported '
Measurement) Performed (LLD) Range _Dist./Dir. Range Range Pesults Surface Water co-60 15 4.02 (1/24) Discharge 4.02 (1/12)' All <LLD 0 (36) single value Line single value (pCi/ liter) l !
zn-65 30 l All <LLD "
l All <LLD 0 (continued) (36) '
l.
Nb-95 15 All <LLD ,
All <LLD 0 (36) '
I Zr-95 30 i All <LLD All (LLD 0 !
(36)
Cs-134 15 All <LLD All <LLD g 0 ,
(36)
N Cs-137 18 All <LLD '
All <LLD 0 !
(36) !
! Ba-140 60 All <LLD All <LLD 0 (36) .
La-140 15 All <LLD All <LLD 0 (36)
Gross Beta 4 7.88 (24/24) '
Discharge 10.1 (12/12) 5.76 (12/12) 0 (36) 2.88 - 22.9 Line 3.33 - 22.9 2.63 - 9.83
- = . -- . - --__
.__ ________ ___==
l Groundwater H-3 2000 1597 (4/4) , WD 1597 (4/4) 1522 (4/4) 0 (8) 1426 - 1731 470 m SW 1426 - 1731 1373 - 1802 (pci/ liter) .
Mn-54 15 All <LLD All <LLD 0 (8)
Co-58 15 All <LLD All <LLD 0 (8)
Fe-59 30 . All <LLD j All <LLD 0 !
(8) j ! ! '
!' l Co-60 15 All <LLD ! All (LLD 0 (8)
~ . - . - . . . .. , ,
~
k TABLE 5 '
RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM
SUMMARY
(Page 3 of 6)- .
River Bend-Station Docket Numbers 50-458 West Feliciana Parish, Louisiana Reporting Period: 1/1/86 - 12/31/86
.j -
Medium or Type and i Lower Limit All Indicator-i . Location with Highest i Control i Number of !
Pathway Sampled Total Number !. of Stations ! A"""*l M**" ! L cations ! " "# "DI"* !-
g Mean (f)2* ! Reported .! '
(Unit of I of Analyses ! Detection
- Mean (f)2- Name Mean (f)2 ' -
Measurement) Performed *
(LLD) Range _Dist./Dir. Range Range Results 'l
! Groundwater- En-65. 30 l .All <LLD . ! All <LLD .
'O. !'
! (8) ! ! -
! (pCi/ liter) ! '! ~!'. . . !
! l Nb-95 ! 15 ! All (LLD .l . All (LLD g, 0 .!
l (continued) (8) ! ! ! .
, ! l' 3
Zr-95 30 All <LLD ! All <LLD. O. !
l (8) l l Cs-134 15 i All (LLD All <LLD 0
. ! (8) l !-
Cs-137 18 '
All <LLD l ! All <LLD 0 ~
'i (8) ! ! l y Ba-140 60 All <LLD ! All <LLD' ! O j '.
' (8) ! !--
.! l t La-140- 15 '
All <LLD ! All (LLD 0 f (8) .j- !
2.61 (4/4)5
! Gross Beta . . 4 WD 2.61 (4/4) ' ? O (8) '
<LLD
....l_..
3.35 470 m SW <LLD-3.35.l2.25(4/4) 1.73 - 3.24
._g.__ __.- - - . . . _
Drinking Water . H-3 2000 '1609 (4/4) Donaldson- 1609.(4/4)- 1582 (4/4) ! 0 !.
l (4) 1533 - 1686 ville 1533 - 1686 1363 --1780 !
(pci/ liter) { 138 km Downstream l
' Mn-54 15 All (LLD j O !
(12) '
- l. All <LLD !
l 4 !
' I Co-58 15 All (LLD .
-l All <LLD 0 $
(12) !
a Fe-59 30 All <LLD l .I All (LLD 0
! (12) " ! ! ! !
! I l
? Co-60 l 15 All <LLD- l All <LLD l 0 (12) ! !
Zn-65 ! 30 All.<LLD ' All <LLD ! 0 (12)
V
TABLE 5 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM
SUMMARY
(Page 4 of 6) ,
River Bend Station Docket Number: 50-458 West Feliciana Parish, Louisiana Reporting Period: 1/1/86 - 12/31/86 l Medium or l, Type and Lower Limit *i All Indicator Location with Highest l Control Number of j
! Pathway Sampled Total Number , of g Stations l Annual Mean ca ns Nonroutine l (Unit of , of Analyses ! Detection Mean (f)y Name Mean (f)2 l Mean (f)2 Reported Measurement) '
Performed '
(LLD) Range Dist./Dir. Range Range Results !
6
, Drinking Water Nb-95 15 l All <LLD ! ,
All <LLD , 0 $
j (12) l l l
! (pci/ liter) l l
! Zr-95 30 All (LLD '
All (LLD j 0 (continued) l (12) '
' le !
. Cs-134 15 All <LLD ! All <LLD ! 0 l l (12) .
l l l
Cs-137 18 All <LLD '
All <LLD 0 j (12) l .
j i i Ba-140 60 All <LLD All <LLD L 0 '
(12) , ,
M La-140 15 All <LLD All <LLD 0 (12) 'l e
i Gross Beta 4 5.66 (12/12)7 Donaldson- 5.66 (12/12) 5/76 (12/12)! 0 (12) <LLD - 10.2 ville <LLD - 10.2 2.63 - 9.83 l . 138 km ,
' Downstream '
_____ ______ =--- _ _ - - - . . _ - - - -
Shoreline K-40 None , 18590 (2/2) SED 18590 (2/2) l Not 0 Sediment (2) Required l 16980 - 20210 4 km f16980 - 20210 Required Downstream t
, (pCi/kg dry)
- Cs-134 150 All <LLD All <LLD 0 (2) ,
I Cs-137 . 180 All <LLD '
All <LLD 0 !
(2) ? !
(32) Required l 350 - 1473 6 km ESE 350 - 1473 768 - 1490 !
(pCi/ liter) l, ! !
8 I-131 1 5.55 (8/18) MP2 5.55 (8/18) g0.82-14.1 2.06 (3/14) 0 l
(32) 0.82 - 14.1 6 km ESE 1.78 - 2.53 ,
g Cs-134 15 1.46 (3/18) P MP2 1.46 (3/18) , 1.27 (1/14)! 0 (32) 1.07 - 1.87 6 km ESE 1.07 - 1.87 ' single value
l TABLE 5 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM CUMMARY (Page 5 of 6) .
River Bend ftation Docket Number: 50-458 West Feliciana Parish, Lcuisiana Reporting Period: 1/1/86 - 12/31/86
[ Medium or '
Type and i Lower Limit All Indicator i* Location with Highest. i Control Number of l Pathway Sampled Total Number ' of g Stations Annual Mean l Locations '
Nonroutine '
(Unit of of Analyses Detection Mean (f)2 Name Mean (f) Reported Measurement) Performed (LLD) Range Dist./Dir. Range { MeanRange(f)2 ' Results Milk Cs-137 18 4.50 (6/18) MF2 4.50 (6/18) 2.82 (2/14) 0-(32) 2.62 - 5.79 6 km ESE 2.62 - 5.79 2.40 - 3.24 ,
(pCi/ liter)
Ba-140 60 All <LLD All <LLD 0 (continued) (32) , ,
! i La-140 15 All <LLD All <LLD j 0 (32) !
=, -
-l-Fish / Invertebrates K-40 None ,
3028 (8/8) , FD 3028 (8/8) 2871 (9/9) l 0 (17) Required '
1770 - 3785 4 km 1770 - 3785 2173 - 3282 '
(pCi/kg wet) Downstream Mn-54 130 All <LLD ' All <LLD 0 f l
(17)
- N
- Co-58 130 All <LLD All <LLD 0 (17) ,
Fe-59 260 All <LLD ,
All <LLD 0 (17) .
l J Co-60 130 All <LLD All <LLD 0 (17) l I-Zn-65 260 All <LLD All <LLD 0 l (17) '
Cs-134 130 All <LLD All <LLD 0 (17)
Cs-137 150 All (LLD All <LLD 0 (17) e Broadleaf Be-7 ? None 386 (21/72) f G1 359 (10/36) 1079 (15/36)' O l Vegetation (108) l Required 87.7 - 834 1 km WNW 87.7 - 693 203 - 3919 (pCi/kg wet) K-40 None ' 2869 (56/72) G2 i 3091 (29/36) 4254 (26/36) 0 (108) Required 546 - 6232 1.3 km NW 546 - 6232 1732 - 9980 e
I-131 9 '
60 36.2 (6/72) G1 54.7 (2/36) , 100 (3/36) '
0 (108) 17.2 - 92.2 1 km WNW , 17.2 - 92.2 ' 95.4 - 104
TABLE 5
~
RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM
SUMMARY
(Page 6 of 6) ,
River Bend Station Docket Number 50-458 West Feliciana Parish, Louisiana Reporting Period: 1/1/86 - 12/31/86 Medium or Type and i Lower Limit All Indicator Location with Highest Control .i Number of j Pathway Sampled Total Number ' of y Stations Annual Mean L cations ? Nonroutine-!
(Unit of of Analyses Detection Mean (f) 2 Name Mean (f)2 Mean (f)2 l Reported '
Measurement) Performed (LLD) Range Dist./Dir. Range Range Results-Broadleaf Cs-134 60 All <LLD , All <LLD 0 Vegetation (108)
(pci/kg wet) i Cs-137 80 35.6 (2/72) , G1 46.1 (1/36) All <LLD , 0 '
(108) 25.0 - 46.1 '
1 km WNW single value (continued)
NOTES:
- 2. Mean and range based on detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parentheses. (f)
- 3. Elevated levels of gross beta activity were measured at all locations on samples collected during weeks 20 through 23 of 1986 as a consequence of the Chernobyl accident. Cesium-137 was measured at 1 indica-tor and 2 control locations, and Ruthenium-103 was measured at 4 indicator and 2 control locations during this period. (See Appendix B.)
- 4. Radioiodine was measured .at all locations on samples collected during weeks 20 and 21 of 1986 as a consequence of the Chernobyl accident (see Appendix B).
- 5. The gross beta activity of the 3rd Quarter grab sample was measured as 0.98 pCi/ liter, less than an LLD of 1.91 pCi/ liter obtained on the day the analysis was performed.
- 6. The upstream surface water sampling location (SWU) is used as a " control" for drinking water comparisons.
- 7. The gross beta activity of the February, 1986, composite sample was measured as 2.48 pCi/ liter, less than an LLD of 2.94 pCi/ liter obtained on the day the analysis was performed.
- 8. Radioiodine, Cesium-134, and Cesium-137 were measured at all locations during May and June, 1986, as a consequence of the Chernobyl accident. Zinc-69m was measured at the indicator location in May, 1986.
(See Appendix B.)
- 9. Radioiodine, Cs-137, Ru-103, and Arsenic-76 were measured at one or both indicator locations during May and June, 1986, as a consequence of the Chernobyl accident. Radioiodine was measured during May, 1986, at the control location. (See Appendix B.)
2
~P ,
- E RIVER BEND STATION-1 RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR 1986 Tritium activities in surface water averaged 2366
~
- all other stations.
' pci/ liter -in the ' Discharge Line and from about 1600 to 1700 pCi/ liters at 'all' other stations. - Gross beta activities averaged 2.61: and 2.25 (
pCi/ liter in the downgradient and upgradient samples, respectively.
' Groundwater tritium concentrations averaged 1597 pCi/ liter-in.tne'down-
- gradientfwelliand 1522 pCi/ liter in the upgradient well. Only naturally occurring gamma emitters (e.g. ,_ Potassium-40) were measured in. shoreline
~
sediment from the Mississippi River below RBS.
~
3.1. 4 - ' Ingestion' Exposure' Pathway - Concentrations of radioiodine and other gamma emitters were. all below their respective LLDs except i during late May and early June. At this time, airborne ~ contamination resulting from the Chernobyl incident was deposited by rainfall and was
. measured in milk and vegetation from indicator and control locations (Table 5,. Appendix B). . Only naturally occurring ' gamma emitters (e.g. ,
. Potassium-40) were detectable in fieh-and river shrimp samples from 1986.
3.2: Comparison of Operational and Baseline REMP Results Radioiodine and other gamma emitters in the airborne exposure
~ pathway were not measured at levels above the LLDs.during 1986 except during the. three to four. week period in the second quarter when
-Chernobyl impacts were being observed (Table 5, Appendix. B)'. Gross. beta activities on air particulate filters averaged 0.03 pCi/ cubic meter at
-both indicator and control' locations in;1986, as they did during the .
preoperational phase'of the REMP (Appendix A).
-In the direct exposure pathway, the 1986 net monthly average read-ings-for monthly and quarterly TLDs from both indicator and control lo-cations were slightly . lower than the corresponiing values for previous years. Thus far, no appreciable differences:have been observed-in TLD exposures between_ indicator and control locations or between the same locations from'one_ year to the next.
In the waterborne exposure pathway, no gamma-emitting nuclides were
-measured above the RBS Technical Specification LLDs during 1986, as had been the case during the preoperational-phase (Appendix A). Gross beta and tritium (H-3) levels in water are compared below:
WATERBORNE AVERAGE GROSS BETA- (pCi/ liter) 1/1/85- 10/31/85-10/31/85 12/31/85 1986 Surface Water, Upstream (4 km) 7.8 7 5.76 RBS Discharge Line- N/A 6 10.10 Surface Water, Downstream (4 km) 8.1 6.3 '5.69
- D Drinking Water (Donaldsonville) 6.8 5.5 5.66 Upgradient Groundwater 6 2 2.25 Downgradient Groundwater 4 2 2.61 26
N
- s. f - RIVER BEND STATION: .. .
E
-RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR 1986 WATERBORNE AVERAGE TRITIUM (pCi/ liter) 1/1/85- 10/31/85-10/31/85 12/31/85 1986 Surface Water, Upstream (4 km) < 2000 < 2000 1582.
.RBS Discharge Line .
- N/A < 2000 2365 Surface Water,: Downstream (4 km) < 2000 < 2000 ' 1699 '
~
Drinking Water (Donaldsonville) < 2000 < 2000 1609 Upgradient Groundwater < 2000 < 2000 1522 Downgradient - Groundwater < 2000 < 2000 1597 With the exception of the Discharge Line sampling point, the 1986. water-borne gross 1 beta and tritium activities averaged about the same or slightly 1cwer than'those observed in previous years'.- The slightly in-
~
- creased-levels of gross beta and tritium activity in the Discharge Line during 1986 are well below the reporting levels established in RBS Tech-nical Specifications. It should be'noted that Discharge Line monitoring.
results-are based on composites of hourly aliquots of equal volume, rather than on flow-weighted hourly grabs. Although it.may be argued-
'that the long-term averages may be fairly representative, it can be seen that .the' sampling requirement would be truly representative (especially
- for individual months) only if RBS liquid discharges were continuous-at a constant rate,~ which is not the case.
In the ' ingestion exposure pathway, no gamma-emitting nuclides were.
measured'above.LLDs except during May and June, 1986, when precipitation deposited airborne contamination from the Chernobyl accident upon vege- -
, tation (including dairy forage)- in the general vicinity of RBS (see -
Appendix B).- In 1986 there appear to have been no increases in radio-nuclide concentrations, attributable to RBS operation, in food / forage-
. media over preoperational levels (Appendix A). Naturally occurring
- Potassium-40 (K-40) was measured at 1335 pCi/ liter in indicator milk and at 2869 pCi/kg in indicator vegetation during 1986, as compared. to 1313
- .pCi/ liter (milk) and 3782 pCi/kg (vegetation) during the preoperational REMP. ' Another naturally occurring nuclide, Beryllium-7, was detected at 386 and 1079 pCi/kg in indicator and control vegetation samp.les, respec-tively; however, none was quantified during the baseline phase for ~ com-parison.
3.3 Comparison of REMP Results with Operational Controls r
The only measurable increases in concentrations of radionuclides or levels of radiation in the vicinity of RBS during 1986 appear to have been associated with the fallout from Chernobyl and the expected low levels in the Discharge Line. The indicator versus control comparisons
- for airborne gross beta activity (Section 3.1.1; Table 5) corroborate the-reports of limited or no releases of particulate or radiciodine in 1986. The 1986 environmental TLD data (Section 3.1.2; Table 5) showed no appreciable differences in direct radiation exposures between indi-cator and control locations. These findings substantiate the adequacy of source control and effluent monitoring at River Bend Station.
27 a
- v. w -*wfew- yr -"-- 9ee,=-m+- y wye g atr wt*=w?$' T 9 c- g- ?++-T-t --7e f
- t' y *--*i y 9-m+t- er --vs.T-~.* --
e ei = ens me r-quie g-
- iL -
RIVER BEND STATION
. RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT ~FOR 1986-APPENDIX A Summary of Preoperational REMP (Baseline) Results Table A.1 summarizes.the results of preoperational radiological environmental' monitoring from January, 1983, through October, 1985.-
Further details are available in the respective annual reports .(1983, 1984, 'and 1985) .
A-1
TABLE A.1 PPEOPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM
SUMMARY
(Page 1 of 6) ,
River Bend Station Docket Number: 50-458.
West Feliciana Parish, Louisiana Reporting Period: 1/1/03 - 10/31/85 Medium or Type and Lower Limit i All Indicator Location with Highest Control i Number of l Pathway Sampled Total Number of i Stations A"""*1 "**" l' (Unit of of Analyses Detection g
Mean (f)2 Name Mean (f) 2 , L cationsMean (f) Reported y l Nonroutine g
Measurement) Performed (LLD) Range Dist./Dir. Range Range Results i
Air Particulate Gross Beta 0.01 0.03 AQS2 O.03 l 0.03 N/A 3
(1086) (752/759) 5.8 km NW (146/158) '
(326/327) '
(pCi/m ) 0.01 - 0.09 0.01 - 0.09 0.01 - 0.08 Cs-134 0.05 All <LLD , All <LLD N/A (95) l !
Cs-137 0.06 All <LLD '
All <LLD f N/A (95)
__-- __ -- - - - ___ ==______ -- -- - - - - -_____ - __ _____ =. ___
All <LLD All <LLD ' N/A Air Radioiodine I-131 0.07 ,
3 (1086) !
(pCi/m )
- = -.
'__ _____ ____ - ._____ __- --- -_____ - - _ _ _ -- - _____e__.___
> Direct (TLD) Gamma 6.8 TM2 7.8 (27/28) 6.7 N/A Monthly (1018/1064) 4.2 km WSW 3.2 - 16.2 (139/150) w (mR Total) (1214) 0.7 - 19.3 0 - 27.8 ,,
3 3 3 Gamma 19.0 TG1 27.5 18.9 N/A Quarterly (404/418) 1.6 km SE (11/11) '
(51/54)
(472) 6.8 - 32.1 12.2 - 27.6 6.5 - 23.5
_ _ _ _ _ _ _ _ _ __ ____ -- _ . - . - ___,._________ - -- __- ._ __= _ ----- . - _ .
Surface Water H-3 2000 All (LLD All <LLD N/A (24)
(pci/ liter) i ,
l Mn-54 '
15 All <LLD All <LLD N/A W (68)
Co-58 15 All <LLD All <LLD N/A (68)
Fe-59 30 All <LLD All <LLD N/A (68)
Co-60 15 All <LLD All <LLD ! N/A (68) l l
Zn-65 30 All <LLD All <LLD N/A (68) !
Nb-95 15 All <LLD All <LLD N/A (68) ,
ts
. . o ,
. .. _v.
TABLE'A.1
' PREOPERATIONAL RADIOLOGICAL ENVIRONMENTAL' MONITORING ' PROGRAM SUteULRY (Page'2 of 6) .
River Bend Station .
Docket Number: 50-458 Nest Feliciana Parish, Louisiana Reporting Period: 1/1/83 - 10/31/85 I Medium or Type and i Lower Limit !- All. Indicator.i Location with Highest. Control i Number of,-l l Pathway Sampled , Total Number ! . of l Stations ! 'A"""*1 "**" L cations Mean (f)2 .jl Nonroutine ' Reported..l!
g
.! (Unit of I of Analyses ! Detection l Mean (f) 2 ' Name Mean ( f) 2
! Results> - l-
' Measurement) ! Performed '
(LLD) Range .Dist./Dir. Range Range i
Surface Nater 3r-95 30 i All <LLD , All.<LLD J! ..N/A: j i (68) .! !- l l- l l-l l
(pCi/ liter) i l Cs-134 15 l
' All <LLD l
l All <LLD .l e N/A
'l 1 (continued) ,
(68) .
l l ! l !
' Cs-137 '
18 All <LLD ' N/A
! l ] All <LLD ! ,
! (68) l l l l
! I !
5 l Ba-140 l 60 All (LLD l l All (LLD- -N/A-(68) ! ! ,
, 'La-140 15 '
All <LLD2 ' ] All <LLD l N/A. l (68) 1 l l l
- n- , i i ! !
' ! Gross Beta 4
, 8.1 (23/26) SND 8.1 l 7.8 l N/A. l
! ! (52) 4 4 km l (23/26) ! (24/26) l W ! ! downstream ! 4 - 12 'l 5 - 13 -l !
- -- - = = __ ; -..______ .____ ________, __. .- -- - - - _
-- l -: __.-- - -
_______.- - l.
l' Groundwater '
, H-3 , 2000 j' All:<LLD l . 'All (LLDf N/A l (24) l l l -
l (pci/ liter)- l .
l
! Mn-54 1 15 l All <LLD ' -l. All <LLD ~!- N/A '
l (22) l l l l - l.
! t- .
! .- ! t-l Co-58 15. All <LLD- l l All <LLD ! N/A !'
(22) l' l-
.- l l .
Fe-59 30' All <LLD' , ,
l All <LLD.- ' N/A -
(22) i
! !! .l- -
! j.
Co-60 '
15 ' All <LLD ' All'<LLD N/A , l -
'(22) , ,
! . l. '!. .
-l
! Zn-65. + l- . 30' ,_- All <LLD '!. ! l, All <LLD- N/A l l (22). l . - l.' l .! . . , !.
l 1 !
t- !
! .. 'l 1.
I ! Nb-95 ' .15 .!
All <LLD
! l All.<LLD. ' N/A
! -(22) , .j- l
, Zr-95 '
- 30. ' 'All <LLD' All'<LLD j N/A- :
l (22) .,
e ,
, .- l
- 1. . . I. !
- ~
m, .
Y ..J m _
y
m y~ n
.. a
~ ".~ ? .,
=
TABLE A.1 -e
' ~ 'PREOPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM $UMMARY s,,
~
' (Page 3 of 6) - _ .
~
T' s River Bend St5 tion' Docket Number: 50-458
'4est Feliciana Parish, Louisiana Reporting Period: 1/1/83 - 10/31/85 Medium or l Type and- Lcwer Limit All Indicator . Location with Highest '[-Control l Number of '
Pathway Sampled .! Total Number of - y' ~; Stations Annual Mean -
l, (Unit of
~
! of Analyses l Detection Mean (f)y ' Name Mear. (f)3.l1LrcationsMean (f)2 '
Reported Nonroutine Measurement)
(LLD) Range Dist./Dir. Rangs' Range Results i_ Performed
! Groundwater ,h~2 Cs-134 , 15 All <LLD All <LLD ) N/A -
l
!~
(22) x ,
! (pci/ liter) !
l Cs-137 . 18 All <LLD ' All (LLD N/A (continued) (22) '
.All <LLD !
N/A '
l Ba-140 60 All <LLD (22)
La-140 l 15 All <LLD , All <LLD N/A (22) ! !
, . Gross Beta ! 4 4 (5/12) WD 4 (5/12) 6 (2/3) N/A (15) '
2-8 470 m SW 2-8 3-9 y ;..- .- - .. ...- - - - - - - -
g l Drinking Water l H-3 2000 All <LLD All <LLD N/A '
(18) -
- (pCi/ liter) -
! Mn-54 15 All <LLD '
All <LLD N/A ,
(40)
Cc-58 .15 'All (LLD All (LLD N/A (40) ! !
l Fe-59 .
30 All <LLD '
All <LLD N/A '
l (40) '
' Co-60 - 15 All <LLD All <LLD N/A (40) ~
I Zn-65 30 All <LLD .
- All <LLD '
N/A (40) l.
e Nb-95 l 15 All <LLD '-
All (LLD '
N/A (40) ~ j -
Zr-95 l. ' 30 '
??1 <LLD , All <LLD N/A (40) * '
. l ,
l Cs-134 15 All <LLD l All <LLD N/A 'f (40) l l ,
i
'l l '
- o TABLE 6S. 4 PREOPERATIONAL RADIOLOGICAL ENVIRONA W A' MONITORING PROGRAM
SUMMARY
(Page 4 /d 6) ,
River Bend Station Docket Number 50-458 Nest Feliciana Parish, Louisiana Reporting Period: 1/1/83 - 10/31/85 Medium or Type and i Lower Limit 'i All Indicator Location with Highest l Control i Number of Pathway Sampled Total Number of y Stations Annual Mean !
(Unit of of Analyses Detection Mean (f) 2 Name Mean (f)2 j l . L cationsMean !.
(f) 2 l Nonroutine Reported Measurement) Performed (LLD) Range .Dist./Dir. Range '
Range Results l
' l All (LLD N/A l Drinking Water Cs-137 18 All <LLD ,
l (40) l' -l (pci/ liter) l l '! l ' l'
, Ba-140- 60 All <LLD ! ! ! All <LLD l N/A l (continued) '
(40) l l l ! !
! . l l 15 All <LLD l l All (LLD l N/A l La-140 l (40) ! ! !
Gross Beta 4 6.8 (28/28) Donaldson- 6.8 (28/28) l7.8 (24/26) l N/A ~j l
(54) 3 - 12 ! ville ! 3 - 12 ! 5 - 13 I l l 138 km
! Idownstreaml' _-l____________
l ____----- -- - l
? f g --l- - ___ __ _-
- . Shoreline f K-40 None 13.7E3 (2/2) ' SED ! 13.7E3(2/2) l Not l N/A
'~
l
?(11.4-15.9)E3l Required !
, Sediment (2) ,
Required .(11.4-15.9)E3 l 4 km downstream '
- (pCi/kg dry) ! ! ,
Cs-134 150 All <LLD ! ! ! N/A i (4) '
l l l l.
1 : !
Cs-137 . 180 All <LLD .' ! N/A l (4) i !
=-__ .___,_ - -g____ l - --- . _________ l__ _- ____' -___g__ _
Milk K-40 None 1313 (8/9) l MF2 1313 (8/9) ' 1318 (7/9) ! N/A 1 (18) Required 1179 - 1475 6 km ESE 1179 - 1475 1196 - 1409 l' !
(pci/ liter) ,
7 l l I-131 1 .All <LLD All <LLD N/A l (81) , ,
l' Cs-134 15 All <LLD All <LLD N/A l-8 (82) l !
7 ! !
Cs-137 18 All <LLD l '! All <LLD N/A I (82) l l Ba-140 60 All <LLD All <LLD I N/A (82) l
~
, La-140 15 All <LLD All <LLD l N/A (82) ! ! l
~!
r
! ! I l
r .
l L ...c l-1 TABLE A.1 <
l PREOPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM
SUMMARY
(Page 5 of 6) .
River Bend Station Docket Number 50-458 ,
< West Feliciana Parish,. Louisiana Reporting Period: 1/1/83 - 10/31/85 l
Medium or Type and i. Lower Limit i All Indicator i Location with Highest j -Control i Number of l Pathway Sampled Total Number ! of ! Stations !' Annual Mean- ! L cations 'i N nroutineLl.
Mean ( f) 2 !: Mean (f)2.] . Reported l g
[ (Unit of .'. of Analyses ! Detection l Mean = (f)) ! Name .
- l. l Measurement) Performed ! (LLD)- ! Range l Dist./Dir. Range Range l Results !
I ' 'I I I I !
6
! Fish / Invertebrates 9037 (2/2) ' . 9037: (2/2) '7840-- (4/4)-l N/A 'l K-40 None ! FD l j '
(6) Required- l 6320 - 11754 4 km (6320 - 11754 4177 - 11438! . l-l (pCi/kg wet) l , downstream.!- l ,
{. ! . l !
' All <LLD.
! Mn-54 '
.130 l All <ILD l .N/A' l.
(15) l .. j Co-58 130 All <LLD \ -l .All <LLD ! N/A . .l-(15) . . l l l Fe-59 260 l All <LLD ! l All <LLD l' N/A- l (15) l l !
Co-60 130 All <LLD . l 'All (LLD N/A !
> (15) j ! ! .1 1:
. . . 1 8 '
zn-65 260 All <LLD l l All <LLD . i! N/A l m (15) ! 'l j l l. l 4 Cs-134 W 130 All <LLD ! ! All <LLD N/A' l.
(15) l . I !
! 'l ,
1 Cs-137 ! 150 . All <LLD !
. All <LLD '
N/A !
l (15) ! ! l !
-- g - =-- ===---
=--l--
l l Broadleaf K-40 l None ! 3368 (6/11) . -. G2 3368 (6/11) l' 3768 N/A Vegetation '
(12) ! Required ! 1398 - 5389 1.3 km Nw . 1398 - 5389 l single value i 7 ~
(pci/kg wet) I-131 60 .All <LLD All (LLD l N/A .
(75) ! ! !
Cs-134 60 All <LLD ! ! All <LLD ! N/A (76) ! !
I Cs-137 80 97 (4/43) G1 97 (4/43) l All'<LLD ! N/A !
! (76) 59 '120 1 km WNW 59 - 120
- l. l I
.- l
- l-i u :
-l !.
i !
. i ! l :
i
TABLE A.1 .
PREOPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM
SUMMARY
(Page 6 of 6) .
River Bend Station Docket Number 50-458 West Feliciana Parish, Louisiana Reporting Period: 1/1/83 - 10/31/95 NOTES:
- 2. Mean and range based on detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parentheses. (f)
- 3. For each of the TLD locations in 1985, a value equal to 1/3 of its 4th Quarter gamma dose is used to simulate a " quarterly" measurement for October, 1985.
- 4. Beginning in January, 1985, groundwater was sampled from one upgradient (WU - control) and one downgradient (WD - indicator) well; previously groundwater was sampled from construction dewatering wells.
- 5. The upstream surface water sampling location (SWU) is used as a " control" for drinking water analyses comparisons.
- 6. The values listed for K-40 were derived from the (then) incipient in-house analytical program.
> 7. The values listed for the control location for milk were derived from the (then) incipient in-house i analytical program. Training of personnel in calibration and analytical methods delayed sample y preparation and counting. As a result, the required LLDs were not met in 2 out of 8. I-131 analyses; 1 out of 9 Cs-134 analyses; 1 out of 9 Cs-137 analyses; 2 out of 9 Ba-140 analyses; and 4 out of 9 La-140 analyses. Similarly, the required LLD for I-131 in broadleaf vegetation was not met in 1 out of 11 analyses. (See discussion of Program Exceptions in Preoperational Radiological Environmental Monitoring Report for 1985.)
s i
4 %
.x .
3 _
= RIVER: BEND STATION.
- RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR.1986=
, 4 APPENDIX B i L Summary of Observations Related to the Chernobyl Accident Certain results of -the River Bend . Station. Radiological Environmen-tal Monitoring -Program :(RENF) for.1986 reflect the' influence of fallout ,
-from releases associated with an' accident at Chernobyl, Russia. The accident began:on' April: 26, 1986, when a graphite-moderated ~ reactor ig--
nited. The initial plume of-airborne radioactive fission products moved northwest through Poland and then -north toward Scandinavia during -the period from April'26_through'29. The contaminants reached central.Eu-rope on-April 29/30, and had spread over western Europe by.May 5. )From-
- May 5'on, components of'th'e Chernobyl releases were detected in-Turkey,-
Japan, Korea, and the United States. A. P. Hull of the Brookhaven
" , National. Laboratory, 'in a report - titled ," Preliminary- Dose Assessment of the Chernobyl Accident," noted that the Chernobyl plume-included the following nuclide mix:
Zr-95 Sb-127 I-133 .La-140 Nb-95 -Te-129m I-135' Ce-141 Mo-99 Te-131m Cs-134 Ce-144'-
' Re-103 - Te-132 Cs-136. Np-239-Ru-106 I-131. Cs-137 Cd-115 I-132 Ba-140 -
Measurable amounts of same of these nuclides were wash'ed by rain onto southern' Louisiana vegetation during'.the.second week of May, 1986.
The Nuclear Energy Division of' the Lousiana Department of Environmental'
- Quality -(LNED) first detected the fallouts (as 1-131) in rainwat'e'r col-lected11n Baton Rouge on May 10. .The.RBS REMP program measured I-131 in
- duplicate milk' samples collected 6 -km east-southeast. of the plant .on May
-12 (1.8 and = 1.9 pCi/ lite'r) . These and'other REMP measurements were periodically telephoned to the Nuclear. Regulatory Commission Operations Center-during the ensuing weeks, as requested by I&E Information Not; . .,
86-12. 1Information was also frequently exchanged with the LNED. : RBS efforts were intensified in order to accumulate as much data as.
possible:
Air Particulate Filters - gamma isotopic . analyses performed on
-individual filters weekly, instead of quarterly composites.
Surface Water - gamma isotopic analyses per_ formed on weekly grab samples, instead of monthly composites.
Milk - sampled / analyzed nine times during May/ June, often in duplicate or triplicate,-instead of twice each month. ,
B-1 r
j
r J.
Precipitation -Three samples collected in May (this medium not normally sampled).
Vegetation _ Four samples of forage from REMP milk indicator location in May/ June (this medium not normally sampled at this location).
Gross beta activities on air particulate filters increased by a factor of about 3 during weeks 7 through 10 of the second quarter of 1986 at both indicator and control locations (Figure B.2). In generat, there was no discernible increase in gross beta'actitivities in surface water during this period. However, a slight increase was noted in the RBS Discharge Line samples as reflected in the following sequence:
March 1986 composite - 4.18 pCi/ liter gross beta April 1986 composite - 6.38 pCi/ liter gross beta May 1986 composite - 9.85 pCi/ liter gross beta June 1986 composite - 9.01 pCi/ liter gross beta July 1986 composite - 4.91 pCi/ liter gross beta This increase may be attributable to entrainment of Chernobyl-related airborne particulates by River Bend's m2chanical draft cooling towers.
Gamma isotopic analyses of individual (weekly) air particulate filters and charcoal cartridges measured Iodine-131, Cesium-137, and Ruthenium-103 as follows:
SAMPLING PERIOD LOCATION 5/12 - 5/19 5/19 - 5/27 5/27 - 6/2
.. 1-131 (E-2 pC1/ cubic meter) ...
AAl 8.4 9.5 AB1 8.8 9.1 AR1 9.8 9.0 AKS 8.4 (25.2 pCi/ filter)
API 8.2 11.9 AQS2 8.2 11.7 ALC 9.4 8.6 AGS 9.4 10.9 AHS 10.3 11.3
. . . Cs-137 (E-2 pCi/ cubic meter) ...
API 2.9 AGS 2.5 AHS 2.7 3.0
. . . Ru-103 (E-2 pCi/ cubic meter) ...
AA1 4.8 AB1 4.0 ARI 2.4 4.5 AQS2 2.4 ALC 3.2 AHS 3.9 B-2 :
I
FIGURE'B.1 RIVER BEND STATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM
-AIR PARTICULATE FILTER ANALYSIS GROSS BETA
SUMMARY
IUR
.SECOND QUARTER 1986 GROSS BETA BY IDCATION (pCi/m3)
WEEK ------------------------------------------------------------------------------
ENDING AA-1 AB-1 AR-1 AK-S -AQ-S2 AP-1 AL-C AG-S AH-S 04/07/86 0.019 0.024 0.022 0.019 0.021 0.024 0.006 0.026- 99.999 04/14/86 0.015 .0.021 0.022 0.021 0.020 0.022 0.023 0.025 0.021 04/21/86 0.021 0.023 0.021 0.020 0.023 0.024 0.021 0.025 0.019 04/28/86 0.024 0.029 0.026 0.026 0.025 0.029 0.026 0.031 0.025 05/05/86 0.007 0.024 0.027 0.024 0.023 0.028 0.028 0.026 0.026
-t 05/12/86 0.032 0.030 0.033 0.030 0.032 0.033 0.031 0.038 0.029 :
- 05/19/86 0.056 0.098 0.098 0.089 0.086 0.092 0.084 0.103 0.090 :
- 05/26/86 0.100- 0.125 0.094
- 0.070 0.117 0.094 0.099 -0.119 :
- 06/02/86 0.085 0.081 0.085
- 0.092 0.085 0.091 0.104 0.124 :
- 06/09/86 ,0.047 0.042 0.062 0.045 0.044 0.058 0.048 0.056 0.046 :
- 06/16/86-- 0.032 0.031 0.034 0.029 0.027 0.032 0.034 0.036 0.027 :
06/23/86 0.022 0.017 0.021 0.021 0.018 0.019 0.020 0.020 0.018 06/30/86 0.031 0.028 0.029 0.028 0.026 0.032 0.031 :0.023 0.029
.
- Data for this week lost due to equipment malfunction.
l B-3
r The intensified sampling of vegetation at RBS REMP locations in May-and June, 1986, detected the following concentrations (pCi/kg wet) of ganna-emitting nuclides:
LOCATION (DATE) I-131 Cs-134 Cs-137 Ru-103 MF2 (5/14/86) 63.9 25.6 GQC (5/15/86) 100 G1 (5/20/86) 92.2 46.1 18.3 MF2 (5/20/86) 267 22.2 42.0 33.0 G2 (5/22/86) 45.8 MF2 (5/22/86) 338 22.0 44.1 32.2 G2 (5/28/86)* 23.0 11.0 G1 (6/4/86) 17.2 G2 (6/4/85) 19.6 25.0 22.8 MF2 (6/6/86) 46.3 43.3 22.5
- This sample emitted a photopeak identified as Arsenic-76 at 23.4 pCi/kg; when recounted 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> later the peak was no longer present.
The sequence of initial discovery, build-up, and tapering off of radionuclide concentrations (pCi/ liter) in milk from the two RBS REMP locations is well-illustrated in the following summary, which includes the results of analyses of replicate samples:
LOCATION (DATE) I-131 Cs-134 Cs-137 MF2 (5/12/86) 1.8/1.9 MF2 (5/14/86) 3.2/3.1 MQC (5/15/86) 2.5 MF2 (5/16/86) 6.2/6.1 2.7/2.5 MF2 (5/20/86) 14.1 1.1 4.0 MF2 (5/22/86) 10.1/9.4/10.1 1.4 (1 of 3) 6.4/5.7/5.2 MF2 (5/29/86)* 6.9/6.9 1.9 (1 of 2) 4.4/4.8 MQC (6/3/86) 1.8/1.9 1.3 (1 of 2) 3.2/2.4 MF2 (6/6/86) 1.6 5.2 MF2 (6/12/86) 0.8 (1 of 2) 3.9/4.2
- This cample emitted a photopeak identified as Zinc-69m at 10.5 pCi/ liter; when recounted 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> later the peak was no longer present.
A sample of precipitation collected at RBS on 5/18/86 contained 18.5 pCi/ liter of I-131. On 5/25/86, rain approaching Baton Rouge from the southwest was sampled at 1345 hrs and found to contain 19.1 and 6.0 pCi/ liter of I-131 and Ru-103, respectively. Two hours later, rain approaching Baton Rouge from the west-northwest (and from a higher alti-tude) was sampled and found to contain 3.0 and 1.8 pCi/ liter of I-131 and Ru-103, respectively.
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Although the levels of Chernobyl-related airborne contamination were transitory and extremely low (relative to those observed in north-ern and central Europe), they provided an opportunity for the RBS REMP and its LNED counterpart to demonstrate the ability to detect and mea-sure such materials. Throughout the period of intensified monitoring there was general consistency in the results of the respective programs.
The unusual opportunity to study the behavior of radioiodine in environmental media demonstrated that oven-drying of milk or vegetation seems not to significantly affect the subsequent analytical results.
This phenomenon was first observed in the RBS Environmental Scryices Group (ESG) laboratory on milk samples collected on 5/20/86. The milk was processed with ion exchange resin in the usual manner, then dried and counted for gamma-emitting nuclides. The resin extract contained 10.5 pCi/ liter of I-131, and the same milk, dried after resin extrac-tion, containeo 3.6 pCi/ liter of I-131. This observation was reported to LNED personnel, who stated that they had just observed essentially equivalent I-131 concentrations, before and af ter oven-drying, on a sam-ple of vegetation.
An experiment was then performed on triplicate milk samples col-lected at MF2 on 5/22/86. One sample was stirred in a 4-liter beaker with ion-exchange resin, the milk decanted from the resin, and then ove n-d rie d . The second sample was passed through the same amount of resin in an ion-exchange column, then dried. The third sample was dried with no prior treatment. Results of gamma isotopic analyses of the two resin extractions and the three dried portions were (in pCi/ liter):
RESIN RESIN DRIED TOTAL (SPUN) (COLUMN) MILK I-131 Sample A 7.8 -
2.3 10.1 Sample B -
8.5 1.6 10.1 Sample C - -
9.4 9.4 The investigation was continued on duplicate milk samples collected at MF2 on 5/29/86. In one sample, the resin extract contained 5.6 pCi/ liter and the dried portion contained 1.3 pCi/ liter, for a total of 6.9 pCi/ liter of I-131. Exactly the same I-131 concentration was mea-sured in the other sample, which was merely oven-dried. A set of dupli-cate samples collected from MQC on 6/3/86 yielded 1.8 and 1.9 pCi/ liter of I-131, respectively, when processed by resin-extraction / drying versus only oven-drying. By 6/12/86, I-131 was barely detectable in kBS milk samplec. Although more data would be desirable in drawing conclusions, the foregoing strongly suggests that oven-drying of environmental media does not significantly affect (volatilize) radioiodine, at least in the form (s) released as in the case of the Chernobyl accident. It would have been interesting to determine the chemical species (e.g., metallic iodide, iodate; molecular iodine; organic iodide) involved.
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GULF STATES UTILITIES COMPANY RIVER BEND STATION POST OFFICE BOX 220 ST FRANC 15VILLE. LOUIStANA 70775 ARE A CODE 504 635 6094 346-8651 April 28, 1987 RBG 25845 File Nos. G9.5, G9.25.1.4 U.S. Nuclear Regulatory Commission Document Control Desk i Washington, D.C. 20555 =
t Gentlemen:
River Bend Station - Unit 1 Docket No. 50-458 Enclosed is the Annual Radiological Environmental Operating Report for \ '
the period of January 1 through December 31, 1986. This report is (
submitted in accordance with Technical Specification 6.9.1.7 of Appendix A to River Bend Station (RBS) License Number NPF-47.
Sincerely, s f- }
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J. E. Booker Manager-River Bend Oversight River Bend Nuclear Group JEB/ /JVC/je Enclosure cc: U.S. Nuclear Regulatory Commission 611 Ryan Plaza, Suite 1000 Arlington, TX 76011 NRC Resident Inspector P.O. Box 1051 St. Francisville, LA 70775 h>
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