ML20069H452

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Environ Radiological Monitoring Rept,1982
ML20069H452
Person / Time
Site: Robinson Duke Energy icon.png
Issue date: 03/18/1983
From: Denise Edwards, Shearin R
CAROLINA POWER & LIGHT CO.
To:
Shared Package
ML14183A984 List:
References
NUDOCS 8304060069
Download: ML20069H452 (59)
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Text

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Shearon Harris Energy & Environmental Center Carolina Power & Light Company New Hill, North Carolina ENVIRONMENTAL RADIOLOGICAL MONITORING REPORT FOR H. B. ROBINSON STEAM ELECTRIC PLANT JANUARY 1, 1982, THROUGH DECEMBER 31, 1982 Prepared By:

stf f .uv Don H. Edwards Senior Specialist - Environmental Reviewed By:

/fm Ro'n Shearin r,-

, Project Specialist - Environmental Approved By:

,N '

'9/l1Ob ) 1 fi<Mt <

A Principal Specialist - Environmental March 18,1983 8304C60069 830330 PDR ADOCK 05000261

TABLE OF CONTENTS Page 1.0 INTR 000CTION............................................... 1-1 1.1 Plant and Location................................... 1-1 1.2 R adi ol ogi cal Impact C ons i de rati ons . . . . . . . . . . . . . . . . . . . 1-1 1.3 En vi ronmental Moni tori ng P rogram. . . . . . . . . . . . . . . . . . . . . 1-1 2.0 PROGRAM

SUMMARY

............................................ 2-1 3.0 INTERPRETATIONS AND CONCLUSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3.1 A i r S a mp l e s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3.2 Aquati c Vegetation and Bottom Sedi ment. . . . . . . . . . . . . . . 3-9 3.3 Fish................................................. 3-11 i

3.4 Vegetation........................................... 3-15 3.5 Groundwater.......................................... 3-16 3.6 Milk Samples......................................... 3-16 i

3.7 Soil Samples......................................... 3-17 3.8 Surface Water........................................ 3-18 3.9 Thermol umi nescent Dosi met ry Area Monitors . . . . . . . . . . . . 3-26 3.10 S u mm a ry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26 4.0 MISSED SAMPLES AND ANALYSES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4.1 Ai r Pa rti cul at e (Week ly ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4.2 Fish................................................. 4-1 4.3 E n vi r o n me n t a l TL D s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 i

LIST OF TABLES Table Page 1-1 Envi ronmental Radiol ogical Moni toring P rogram. . . . . . . . . . . . . 1-5 2-1 Environmental Radiological Monitoring Program Summary................................................... 2-2 3-1 Radionuclides Detected During 1982 in Monthly Composited Air Particulate Sample and Fractional 0ccurrence................................................ 3-2 3-2 Average Concentration (pCi/g dry) and Fractional Occurrences of Radionuclides in Bottom Sediment and Aqu a ti c Ve ge ta ti on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9 3-3 Average Concentration of Radionuclides in Fish Flesh...... 3-11 3-4 Fish in Lake Bee Compared to Fish in H. B. Robinson Lake...................................................... 3-12 3-5 Average Concentration (pCi/g dry) and Fractional Occurrences of Radionuclides in Cattle Feed and Fo od C r o p s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15 3-6 Ion Exchange Resin........................................ 3-21 ii

LIST OF FIGURES Figure Page 1-1 H. B. Robinson Unit No. 2 Environmental R adi ologi cal Sampl i n g Poi nts . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 1-2 H. B. Robinson Unit No. 2 Environmental Radiological Sampling Points On Site.................. 1-4 3-1 Plot of Air Particulate Gross Beta Activity by Date at Station 02 Versus Control Station Activity.............................................. 3-3 3-2 Plot of Air Particulate Gross Beta Activity hy Date at Station 09 Versus Control Station A c t i v i ty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 3-3 Plot of Air Particulate Gross Beta Activity by Date at Station 17 Versus Control Station A c t i v i ty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 3-4 Plot of Air Particulate Gross Beta Activity hy Date at Station 34 Versus Control Station A c t i v i ty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6 3-5 Plot of Air Particulate Gross Beta Activity by Date at Station 35 Versus Control Station Activity.............................................. 3-7 3-6 Plot of Air Particulate Gross Beta Activity by Date at Station 36 Versus Control Station A c t i v i ty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8 3-7 Plot of Surface Water Gross Beta Activity by Date at Station 05 Versus Control S t a t i on A ct i v i ty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22 3-8 Plot of Surface Water Gross Beta Activity hy Date at Station 08 Versus Control S t a t i o n Act i vi ty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23 3-9 Plot of Surface Water Gross Beta Activity by Date at Station 11 Versus Control S t a t i on A ct i v i ty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24 3-10 Plot of Surface Water Gross Beta Activity hy Date at Station 32 Versus Control Station Activity...................................... 3-25 iii

0

1.0 INTRODUCTION

The following report summarizes the Environmental Radiological Monitoring conducted for the H. B. Robinson Steam Electric Plant during the calendar year 1982. This is the sixth year in which the program's sample analyses and data interpretation have been entirely performed by Carolina Power & Light Company.

1.1 Plant and Location The H. B. Robinson Steam Electric Plant is located in northeastern South Carolina near Hartsville and approximately 25 miles northwest of Florence. This site includes a fossil-fueled pl ant, Unit 1, which was placed in service in 1960, and a pressurized water nuclear power reactor, Unit 2, which entered commercie' operation on March 7, 1971. The Robinson Impoundment (hereafter referred to as Lake Robinson) on the plant site was created for Unit 1 and is also a cooling reservoir for Unit 2. Lake Robinson has an area of 2,250 acres with plant intake at the south end, adjacent to the dam. Following condenser use, the water is returned by a 4.2-mile canal to the north end of Lake Robinson near the mouth of Black Creek which flows into the lake from the north.

1.2 Radiological Impact Considerations The most significant mode of population exposure due to plant operation is direct external radiation exposure due to the elevated plume of noble gases. Other potentially important exposure path-ways to man are the airborne radioiodine-pasture-milk and consump-tion of fish from Lake Robinson. Although a relatively insignifi-cant dose is involved, contact with Lake Robinson including fish-ing, boating, and immersion (swimming) is a sectndary dose path to man.

1-1

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1.3 Environmental Monitoring Program The significant elements of these exposure pathways were used to establish the present surveillance program. The program, as pres-ently implemented, is an expansion of that required by the H. B.

Robinson Environmental Technical Specifications. Table 1-1 details the surveillance program, and Figures 1-1 and 1-2 show the environ-mental monitoring locations.

A tabulation of the specific methods used in monitoring the various pathways of exposure to man is as follows:

Gaseous Effluent Path Submersion Dose and Thermoluminescent Dosimetry other External Dose Area Monitors Vegetation Path Vegetation Samples Soil Samples Air Samples Inhalation Path Air Samples Milk Path Milk Samples Feed and Fodder Crop Air Samples Liquid Effluent Path f

Fish Path Surface Water Samples Bottom Sedinent Samples Aquatic Vegetation Samples Fish Samples T

Water and Shoreline Dose Thermoluminescent Dosimetry Area Monitors Surface Water Samples Bottom Sediment Samples Shoreline Sediment Drinking Water Path Groundwater Samnles 1-2

I (39)

S.R. 102 g S.R. 28 g,oy PRESTWOOD 'Iz2 LAKE (323 HARTSVILLE S.R. 403 St tion No. 36 h

24 i es BLACK CREEK I (43)(42)(43)(44)(453 VARY { ,

symbol sampee Type ROBINSON IMPOUNDMENT 1 e)  % AC Air Cartridge I20) .III / N AP Alr Particulate

/ g g3gy AV Aquatic Vegetation

/ SD Bottom Sediment (38) (VARIES) \ FC Food Crop FH Fish D FO Fodder and Feed g

L.

  1. { $(28) (30) GW Grcund Water f / MK M 61k

_ \ ss son (s) sW surface Water

  1. TL TLD

,y H.B. ROBINSON UNIT NO. 2 05) 3,3 i

BLACK CREEK 8. AV. SD,5W t S. TL 17 AC, AP. TL

15. TL A 19. SS, TL
20. TL
23. AV, $D
22. AC, AP, GW,55. TL Og 27 AV, 5 D. 55, 5 W
28. TL 158 29. TL 30 TL
31. TL
32. AV,5D, SS,5W l
36. AC AP,55
30. FH

! MK l

39.

FIGURE 1-1 40. MK H. B. ROBINSON UNIT NO. 2 U: l8 MCBEE ENVIRONMENTAL RADIOLOGICAL SAMPLING POINTS *':

45.

lc FC

48. FH
50. SS, SW

STATION NUMBER SYMBOL NUMBER SYMBOL

1. TL
2. AC,AP,$$ 12. TL
3. TL 13. TL
4. 1L 14 TL
5. SD, R &G, SW 16 TL
6. TL 23 GW 7 TL 24 GW 9

14 AC, AP, SS. TL TL h

35.

A ,SS 11.

AC AP. SS AV, S D, SS, SW, TL 49. SS k

(12)

/

(49)

(11)

(35)

(10)

Q (23)

(7)(4)(33 (50) O (24)' ' (2)

UNIT NO.1 (34) (1) (13)

UNIT NO. 2 VISITOR CENTER SYMBOL SAMPLE TYPE AC Air Cartrfdge (16) AP Air Particulate

( AV Aquatic Vegetation i

i SD Bottom Sediment GW Ground Water q R&G R9 sin and Glasswool SS Soil

(

ggy SW Surface Water v TL TLD i

l l FIGURE 1-2 l H. B. ROBINSON UNIT NO. 2 ENVIRCN?.1 ENTAL RADIOLOGICAL SAMPLING POINTS ON SITE l

l 1-4

TABLE 1-1 ENVIRONMENTAL RADIOLOGICAL M)NITORING PROGRAM H. B. ROBINSON STEAM ELECTRIC PLANT S ple Sampling Type Sampling Point and Description Frequency Sample Size Sample Analysis Air 2-Visitors Center Weekly 300 cu. m. Iodine Cartridge 9-Microwave Tower (AC) 17-East Shore of Lake Across from Plant Intake 22-Ilartsville 34-End of Construction Road West of Plant 35-Dam (West End)

T 36-Florence vi Air 2-Visitors Center Weekly 300 cu. m. Weekly--Gross Alpha Particulate 9-Microwave Tower and Gross Beta; Gamma (AP) 17-East Shore of Lake Across ifGrgssBeta>100 from Plant Intake pCi/m ,Itnthly Com-22-Ilartsville posite Ganna and 34-End of Construction Road Sr-89, 90 West of Plant 35-Dam (West End) 36-Florence

TABLE 1-1 (cont'd)

Sm.iple Sampling Typa Sampling Point and Description Frequency Sample Size Sample Analysis

':quatic

. 8-Discharge Canal Outfall Quarterly 500 grams Gross Beta, Gamma, and legetation 11-Black Creek at Road 1623 Sr-89, 90

(.AV) 21-Bridge at North End o 27-BlackCreekatU.S.1{ Lake 32-Prestwood Lake 33-Ditch Behind Visitors Center Monthly 2 500 grams Gross Beta, Gamma, and Sr-89, 90 50-Ash Pond 3 Quarterly 500 grams Gamma 7 Bottom 5-Plant Intake Quarterly 500 grams Gross Beta, K-40, o Sediment 8-Discharge Canal Outfall Gamma, and Sr-89, 90 (SD) 11-Black Creek at Road 1623 21-Bridge at North End o{ Lake 27-Black Creek at U.S.1 32-Prestwood Lake 33-Ditch Behind Visitors Center Monthly 2 500 grams Gross Beta, Gamma, and Sr-89, 90 Feed Crop 39-Lyndales's Farm Twice during 500 grams Gamma (F0) 40-Fink's Farm growing season (started 1977)

Fish 38-Site Varies within Quarterly 500 grams Flesh--Gross Beta, (FH) Lake Robinson K-40, Gamma, and Sr-89, 90, Bone--Sr-89, 90

TABLE 1-1 (cont'd)

Sac.ple Sampling Type Sampling Point and Description Frequency Sample Size Sample Analysis Food Crop 43-Varies One tobacco 500 grams Gamma (FC) sample during growing season and one sample after it has been cured (started 1977) 44-Varies Twice during 500 grams Gamma 7 45-Varies growing season

" (started 1977)

Groundwater 22-Hartsville Quarterly 4 liters Gross Alpha, Gross (Gil) 23-Unit 1 Well near Site Entrance (started 1st Beta, Tritium, Gamma, 24-Well at West Side of Unit 2 quarter, 1977) and Sr-89, 90 Milk 39-Lyndale's Farm Monthly 8 liters Iodine, Gamma, and (t4() 40-Fink's Farm Sr-89, 90

TABLE 1-1 (cont'd)

Sail.ple Sampling Type Saapling Point and Description Frequency Sample Size Sample Analysis Soil 2-Visitors Center *Every 3 years 500 grams Gross Beta, K-40, (SS) 9-flicrowave Tower Gamma, Sr-89, 90, 11-Black Creek at Road 1623 Single sample on a composite of each 19-East Shore of Lake taken at each station.

(llorth of 18) station, 1 22-Ilartsville square foot 27-Black Creek at U.S. 1 by 1-inch deep 32-Prestwood Lake 34-End of Construction Road West of Plant

- 35-Dam (West End)

& 36-Florence 49-East Shore of Lake at Semiannual 500 grams Gross Beta, K-40, Gama Boat Launch (1 square foot by 1-inch deep) 50-Ash Pond 3 Semiannual 500 grams K-40, Gamma (1 square foot by 1-inch deep)

  • Tuo sample locations will be sampled semiannually on a rotating basis.

TABLE 1-1 (cont'd)

Satple Sampiing Type Sampling Point and Description Frequency Sample Size Sample Analysis Surface 5-Plant Intake Weekly 2.5 liters Weekly--Gross Alpha, tlater 8-Discharge Canal Outfall Gross Beta, and (Sil) 32-Prestwood Lake Tritium, (Gamma and 11-BlackCreekatRoad1p23 Twice Weekly 4 Sr-89, 90 if Gross 27-Black Creek at U.S. 1 Weekly Beta > 100 pCi/1)

(started on Monthly Composite--

3/4/77) Gross Alpha, Gross Beta, Tritium, Gamma, and Sr-89, 90

- Quarterly Composite--

a Gross Alpha, Gross Beta, Tritium (Gamma Sr-89, 90 if Gross Beta > 100 pCi/1) 5-Plant Intake (Ion Exchange Weekly 2,000 liters Gamma Resin)

S-Plant Intake (Glasswool) 50-Ash Pond 4 Monthly 2.5 liters Gamma

TABLE 1-1 (cont'd)

Sm. pl e

. Sampling Type __ Sampling Point and Description Frequency Sample Size Sample Analysis External 1-South Property Line near Monthly Not TLD Readout Radiation Construction Road Applicable Dose 3-South Property Line near (TL) Visitors Center 4-South Property Line near Road 1623 6-Robinson Unit 1 7-Robinson Unit 1 9-Microwave Tower 10-Picnic Area 11-Black Creek at Road 1623 1 12-Intersection of Roads 1623) and 1639 13-Hest Property Line near Construction Road 14-Intersection Area for Road 1623 and Route 151 15-Pine Ridge Baptist Church and Route 151 16-Route 151 - 0.5 mile North of Road 1623 17-East Shore of Lake across from Plant Intake 18-East Shore of Lake (Horth of 17) 19-East Shore of Lake (North of 18)

TABLE 1-1 (cont'd)

Smaple Sampling Type Sasapling Point and Description Frequency Sample Size Sample Analysis External 20-East Shore of Lake Monthly Not TLD Readout Radiation (llorth of Applicable Dose 22-Ilartsville{9)

(TL) 28-Intersection of Transmission Lines and Route 151 (cont'd) 29-Intersection of S.C. 200 and Route 151 30-Intersection of S.C. 200 and i S.C. 53

- 31-Kelly Town H

1 Control Station 2This particular sampling station is an alternate pathway for low-level liquid releases to the environment.

Based on previous results, a more frequent sampling program has been implemented.

3This location was added in 1981 and will be sampled montly for surface water, semiannually for soil, and quarterly for aquatic vegetation.

4This location was sampled twice weekly as a result of a directive by the NRC to CP&L due to no composite sampler being available until the week of April 6,1982.

e-y J M

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A

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\

2.0 PROGRAM 9] MARY The purpose of the Environmental Radiological Monitoring Program is to

' measure any release and accumulation of radioactivity in the environment, to determine whether this radioactivity is the result of the operation of the H. B. Robinson Plant, and to interpret the potential dose to off-site i populations based on the cumulative measurement of radiation of plant

\ or.igin.

Control stations are not recified in the technical specifications to the operating license. For this report, the following locations were used as

,! the control locations for the respective measurements and were intended to indicate conditions away from the H. B. Robinson Plant influence:

' i r Hartsville (Sample Station 22) t Thermoluminescent Dosimetry Area Monitors Air Particulate Samples Charcoal Cartridge Samples - Airborne I-131 Black Creek above Lake Robinson at U.S. #1 (Sample Station 27)

Aquatic Vegetation Bottom Sediment Su-face Water a

No specific control locations have been designated for food crops, feed crops, soil, milk, fish, and groundwater, since none of the stations sampled are points selected ^o be unaffected by station effluents.

Table 2-1 summarizes the environmental radiological monitoring data for the entire year of 1982.

2-1

TA8t.E 2-1 ENVIR0tNENTAL RADIOLOGICAL MONITORING PR0(RAM SLNMARY l

Docket Numbers 261 )

l H. B. Robinson Steam El vetric Plant Calendar Year 1982 Darlington County, Scrth Carolina Location w/Hl; pest Annual Maan Control Locations # of Nonroutine Type and Minimum All Indicator Reported Modium or Pathway Haan Mean f Detectable Locations (2) Name l Samplod or Moasured Total 1 of Range (2) Range (2) Measurenents (3)

Activity Maan Olstance &

l (Unit of Maasurontnt) Measurements Range Direction Performed DOA) (1) MI less W n W M 7.0 0 2 All less h an M A All less N n 2 Air Cortridgos 1-131 g4)

(pCi/m ) 363 1.30E-2 (49/52) N/A Gross Alpha 2.00E-3 1.09E-2 (301/310) Visitor's Center I.33E-2 (52/52)

Air Porticulcate I43 0.2 ml SW 1.0E 5.55E-2 1.12E 5.59E-2 (pCi/m ) 362 8.25E 5.5'E-2 I

IO 3.01E-2 (52/52) N/A 2.89E -2 (309/310) Visitor's Center 3.33E-2 (52/52)

Gross Beta 3.0&-3 0.2 mi SW 7.74E 8.79E-2 1.09E 9.56E-2 362' ' 5.13E 8.79E-2 All less than MDA N/A 3.73E-3 (3/72) End of Con- 7.43E-3 (1/12)

Srfl9 1.40E-3 8.48E 7.4 3E-3 struction Road - (single value) f 84 West of Plant 0.2 mi W 5.93E-4 (1/12) N/A 5.99E-3 (1/72) Visitor's Center 5.99E-3 (1/12)

Sr90 9.00E-4 0.2 mi SW (single value) (single value) 84 (single value)

TABLE 2-1 EN'11RONMENTAL RADIOLOGICAL MONf TORING PROGRAM SLM4ARY H. B. Robinson Steam Electric Plant Docket Numbers 261 Dar1Ington County, Sorth Carolina Calendar Year 1982 Modluu or Pathway Type and Minimum All indicator Locction w/ Highest Annual Mean Control Locations # of Nonroutine Sampled or Maasured Total # of Detectable Locations (2) Namo Mean Mean Reported (Unit of Measuromont) Moasurerrwints Activity Moan Distance & Range (2) Range (2) Measurements (3)

Performed (K)A ) (I) Range Direction Air Particulate Gamnu (pCl/m ) 84 Cs-137 6.00E-3 5.46E-3 *2/72) Visitors Center 1.02E-3 (1/12) All less than K)A N/A 3.91E 1.02E-3 0.2 el SW (single value)

Aquatic Vegetation Gross Deta 4.00E+0 1.46E+1 (28/28) Prestwood Lake 2.35E+1 (4/4) 6.42E+0 (4/4) N/A (pCI/ gram) dry 32 1.29E+0 - 4.89E+1 4.9 mi ESE 1.04E +1 - 4.89E+1 2.59E+0 - 1.25E+1 Sr-89 1.30E-1 2.02E-l (5/28) Bridge at N 3.23E-1 (1/4) 6.78E-l (1/4) N/A 32 4.32E 3.23E-1 End of Lake (single value) (single value) l 4.7 mi N l

l Sr-90 6.10E-2 9.97E-2 (7/28) Discharge Canal 8.92E-2 (3/4) 8.64E-2 (2/4) N/A 32 2.87E 2.02E-l Outfall 6.54E 1.25E-l 8.55E 8.73E-2 3.8 al N l

Gamma 36 Mn-54 6.50E-2 2.75E-1 (5/32) Discharge Canal 5.28E-2 (2/4) All less than K)A N/A 9.28E 9.15E-l Outfall 2.42E 8.15E-1 3.8 mi N l

l

4 TABLE 2-1 ENVIROPMENTAL RADIOLOGICAL MONITORING PROGRAM SlM4ARY H. B. Robinson Steam Electric Plant Docket Numbers 261 Darlington County, Sorth Carolina Calendar Year 1982 Madluin or Pathway Type and Minimum All Indicator Location w/ Highest Annual han Control locatlins # of Nonroutine Sampled or Maasured Total # of Detectable Locations (2) Name Mean Mean Reported (Unit of Measurement) Measurements Activity %an Distance & Range (2) Range (2) Measurements (3)

Performod DOA) (1) Rango Direction Aquatic Vegatation Gamnu (pCI/ gram) dry 36 Co-58 6.00E-2 6.80E-1 (9/32) Discharge Canal 1.29E+0 (2/4) All less than M)A N/A 1.85E 2.13E+0 OutfalI 4.44E 2.13E+0 3.8 mi N l

Y Co-60 6.50E-2 8.79E-1 (11/32) Discharge Canal 2.12E+0 (3/4) All less than MDA N/A 5.82E 5.37E+0 Outfall 4.87E 5.37E+0 3.8 mi N

~.

N;-95 6.00E-2 1.68E-l (1/32) 1.68E-1 (1/4)

Bridge at N All less than MDA N/A (single value) End of Lake (single value) 4.7 al N I

Cs-134 6.50E-2 3.64E-1 (3/32) Ditch Behind 3.64E-1 (3/12) All less than MDA N/A 2.59E 4.25E-1 Visitors Center 2.59E 4.25E-1 0.1 ml SW

TABLE 2-1 ENVIR0fNENTAL RADIOLOGICAL MONITORING PROGRAM SLNMARY H. 8. Robinson Steam Electric Plant Docket Numbers 261 DariIngton County, Sorth Carolina Calendar Year 1982 Madium or Pathway Type and Minimum All Indicator Location w/Hlahest Annual Nan Control Locations # of Nonroutine Sampled or Measured Total # of Detectable Locstions (2) Name Mean Mean Reported (Unit of Mooserrement) Measurements Activity Dean Distance & Range (2) Range (2) Measurements (3)

Performed (WA) (1) Range Direction Aquatic Vogotation Gamma (pCi/ gram) dry 36 Cs-137 7.00E-2 1.03E+0 (28/32) Ditch Behind 1.86E+0 (12/12) 4.97E-1 (4/4) N/A 1.16E 4.83E+0 Visitors Center 1.47E 4.83E+0 1.90E 6.89E-1 0.1 mi SW Co-144 2.65E-1 7.33E-1 (4/32) Bridge at N 7.70E-01 (1/4) All less than MDA N/A 6.83E-l - 7.70E-1 End of Lake (single value)

J 4.7 ml N i

Dottoin Sediment Gross Bota 1.10E-1 1.29E+0 (29/32) Ditch Behind 2.45E+0 (12/12) 3.43E-1 (4/4) N/A (pCi/ gram) dry 36 1.06E 4.44E +0 Visitors Center 6.27E 4.44E+0 7.02E 8.84E-1 I 0.1 mi SW Sr a9 5.00E-1 1.00E-1 (1/32) Plant intake 1.00E-1 (1/4) All less than MDA N/A 36 (single value) 0.1 mi E (single value)

Sr-90 5.00E-l 2.75E-1 (5/32) Ditch Behind 2.82E-1 (3/12) All less than K A N/A 36 9.78E 4.31E-1 Visitors Center 1.93E 3.60E-1 0.1 mi SW

TABLE 2-1 ENVIR0tMENTAL RADIOLOGICAL MONITORING PROGRAM StNMARY ll. B. Robinson Steam Electric Plant Docket Numbers 261 Darlington County, Sorth Carolina Calendar Year 1982 Modlian (,r Pothway Type and Minimum All Indicator Location w/ Highest Annual Mean Control Locations # of Nonroutine Samplod or ib.isured Total # of Datectable locations (2) Name Mean Nan Reported (Unit of I W suronunt) Measurements Activity Mean Distance & Range (2) Range (2) Measurements (3)

Performed (WA) (1) Range Direction Bo t t(s.a Sed ine n t Gamna (pCI/ gram) dry 36 K-40 2.30E-1 5.86E+0 (26/32) Ditch Behind 1.05E+1 (12/12) 4.14E-l (4/4) N/A 2.05E 2.12E+1 Visitors Center 8.52E 2.12E+1 2.76E 6.23E-1 0.1 ml SW

's'

  • Ditch Behind 4.56E+0 (12/17) All less than MDA N/A Co-60 3.00E-2 3.04E+0 (19/32) 1.16E 1.18E+I Visitors Center 7.66E 1.18E+1 0.1 ml SW Cs-137 2.80E-2 5.22E-1 (21/32) Ditch Behind 6.67E-l (12/12) 1.60E-1 (2/4) N/A 3.23E 1.94E+0 visitors Center 5.5'E 1.94E +0 2.67E 2.94E-1 0.1 ml SW Co-141 4.30E-2 2.23E-1 (1/32) Black Creek 2.23E-l (1/4) All less than MDA N/A (single value) at Road 1623 (single value) 0.6 mi ESE

TABLE 2-1 ENVIROPNENTAL RADIOLOGICAL MONITORING PRCGRAM SINMARY II. D. Robinson Steam Electric Plant Docket Numbers 261 Darlington County, Sorth Carolina Calendar Year 1982 Ndlum or Pathway Type and Minimum all Indicator Location w/Hlahest Annual Mean Control Locations # of Nonrm tine Sampled or 143asured Total # of Detectable Locations (2) Name Mean Mean Reported (Unit of N,asurenent) Measuromonts Activity Mean Distance & Range (2) Range (2) Measurements (3)

Performed (WA) (1) Range Direction Fish Bono Sr-89 2.00E t0 1.51E+0 (2/3) Site varies within 1.51E+0 (2/3) No Control N/A (pCI/ gram) dry II 3 9.03E 2.11E+0 Lake Robinson 9.03E 2.11E+0 (Bottom Feodors)

Sr-90 2.00E+0 7.19E+0 (3/3) Site varies within 7.19E+0 No Control N/A 3 8.16E 9.88E+0 Lake Robinson 8.16E 9.88E+0 Fish Bone Sr-89 2.00E+0 1.46E+0 (3/4) Site varies within 1.46E+0 (3/4) No Control N/A (pCl /gema) dry 4 1.49E 3.66E+0 Lake Robinson 1.49E 3.66E+0 (Froo Swimrrors)

Sr-90 2.00E+0 6.27E+0 (2/4) Site varies within 6.27E+0 (2/4) No Control N/A 4 5.53E+0 - 7.01E+0 Lake Robinson 5.53E+0 - 7.01E+0 Fish Flash Gross Beta 4.00E +0 1.37E+1 (3/3) Site varies within 1.37E+1 (3/3) No Control N/A (pCl/ gram) dry 3 1.28E+1 - 9.70E+0 Lake Robinson 1.28E+1 - 9.70E+0 (Bottom Foodors)

(Frc3 Sa lriu.urs ) Gross Bota 4.00E+0 1.36E+1 (4/4) Site varies within 1.36E+1 (4/4) No Control N/A 4 1.17E+1 - 1.61E+1 Lake Robinson 1.17E+1 - 1.61E+1

TABLE 2-1 ENVIROt#4 ENTAL RADIOLOGICAL MONITORING PROGRAM StM4ARY

61. B. Robinson Steam Electric Plant Docket Numbers 261 Darlington County, Sorth Carolina Calendar Year 1982 Modlum or Pathway lype and Minimum All Indicator Location w/ Highest Annual Mean Control Locations # of Nonroutine Sampled or Maasured Total # of Detectable Locations (2) Name Mean Mean Reported l (Unit of Moasurement) Measurements Activity Mean Distance & Range (2) Range (2) Measurements (3)

Performed (F'A) (1) Range Direction Fish Flesh Sr-89 2.00 -1 6.IOE-1 (1/3) Site varies wi thin 6.10E-1 (1/3) No Control N/A (pC1/ gram) dry 3('I (single value) Lake Robinson (single value)

ibttom Feodors i

] Sr-90 1.00E-l 4.60E-l (3/3) Site varies within 4.60E-1 (3/3) No Control N/A I

3 2.33E 6.32E-1 Lake Robinson 7.33E 6.32E-1

7 i

Freo Swimnurs Sr-89 2.00E-1 5.38E-l (1/4) Site varies within 5.38E-1 (1/4) No Control N/A 4 (single value) Lake Robinson (single value)

Sr-90 1.00E-1 1.84E-1 (3/4) Site varies within 1.84E-1 (3/4) No Control N/A 4 8.04E 2.81E-1 Lake Robinson 8.04E 2.81E-1 i

(Bottom feeders) Gamma 1

3(5) i K-40 3.00E-1 8.01E+0 (3/3) Site varies within 8.01E+0 (3/3) No Control N/A 6.92E+0 - 9.12E+0 Lake Robinson 6.92E+0 - 9.12E+0 i

l 1

l'

TABLE 2-1 ENVIROte4 ENTAL RADIOLOGICAL MONITORING PROGRAM StM4ARY H. B. Robinson Steam Electric Plant Docket Numbers 261 Darlington County, Sorth Carolina Calendar Year 1982 Ndlu.a or Pathway Type and Minimum All indicator Location w/HIchest Annual Wan Control Locations # of Nonroutirm Sampled or Maasured Total # of Detectable Locations (2) Name Mean Mean Reported (Unit of Measurement) Measurements Activity Mean Distance & Range (2) Range (2) Measurements (3)

Performed OOA) (1) Range Direc tion Fish Flesh Gamma (pCl/ gram) dry 3 (Bottoen Feodors) Cs-137 7.0T-2 5.75E-1 (3/3) Site varies within 5.75E-1 (3/3) No Control N/A 3.21E 8.29E-1 Lake Robinson 3.21E 8.29E-1 Free Swinmers Camma 4

K-40 3.00E-1 6.51E+0 (4/4) Site varies within 6.51E+0 (4/4) No Control N/A 7.34E 9.83E+0 Lake Robinson 7.34E 9.83E+0 Cs-137 7.00E-2 6.98E-1 (4/4) Site varies within 6.98E-1 (4/4) No Control N/A 9.86E 1.30E+0 -L ue Robinson 9.86E 1.30E+0 Gamma Fodder and Feod 4 (pCl/ gram) dry Cs-137 7.00E-2 245E-1 (3/4) Lyndale's Farm 2.98E-1 (2/2) No Control N/A 1.98E 3.52E-1 11.3 ul SSW 2.4 5E 3.52E-l Gamma Fcod Crop 6) 6 (pCl/ gram) dry Cs-137 7.00E-2 3.52E-1 (3/6) Howle's Farm 4.60E-1 (2/2) No Control N/A 1.36E 5.36E-1 5.0 mi ESE 3.84E 5.36E-1

TABLE 2-1 ENVIR0tNENTAL RADIOLOGICAL MONITORING PRO @AM StM4ARY H. B. Robinson Steam Electric Plant Docket Numbers 261 Darlington County, Sorth Carolina Calendar Year 1982 14ad i.+. or 1% thsay Type and Minimum All Indicator Location w/ Highest Annual Mean Control locations # of Nonroutine Sampled or Maasured Total # of Detectable Locations (2) Name Mean Mean Reported (Unit of Maasurenunt) Measurements Activity Moan Distance & Range (2) Range (2) Heasurements (3)

Perfornud (M) A ) (1) Range Direction Grcundsa ter Gross Alpha 2.0E-1 9.74E-1 (8/12) Well at West 1.03E t0 (2/4) No Control N/A (pci/ liter) 12 6.57E 140E+0 Side - Unit 2 6.57E 1.40E+0 0.1 ml SW

'(

g Cross Bata 8.20E-1 9.44E-1 (9/12) Unit 1 Well Near 1.06E+0 (4/4) No Control N/A 12 4.56E 2.03E+0 Site Entrance 5.73E 2.03E +0 0.1 ml SSE Sr-89 5.00E+0 All less than MA All less than MDA No Control N/A 12 Sr-90 1.20E+0 All less than WA All less than MDA No Control N/A 12 Tritium 3.50E+2 2.llE+2 (2/12) Hartsville 3.17E+2 (1/4) No Control N/A 12 1.6T +2 - 3.17E+2 5.8 mi ESE (single value)

TABLE 2-1 ENVIR0te4 ENTAL RADIOLOGICAt. MONITORING PROCIAM SLM4ARY H. B. Robinson Steam Electric Plant Docket Numbers 261 Darlington County, Sorth Carolina Calendar Year 1982 Medluia or Pathway Type and Minimum All Indicator Location w/Hlqhest Annual Moan Control Locations i of Nonroutine Sampled or Noasured Total i of Detectable Locations (2) Name Mean Mean Reported (Unit of Measuremont) Measurements Activity Mean Distance & Range (2) Range (2) Measurements (3)

Performed (H)A ) (1) Range Direction Gamma Groundwater 12 (pCi/ liter) Cs-137 8.00E+0 7.35E+0 (2/12) Well at West 7.51E+0 (1/4) No Control N/A 7.19E+0 - 7.51E+0 Side of Unit 2 (single value) 0.1 m; SW MIIk l-131 1. 50E-l 6.9tE-1 (3/24) Lyndale's Farm 6.91E-I (3/12) No Control N/A (pCl/ liter) 24 4.90E 9.60E-1 11.3 mi SSW 4.90E-l - 9.60E-1 Sr-89 3.00E+0 3.65E+0 (4/24) Lyndale's Farm 3.97E+0 (2/12) No Control N/A 24 1.97E+0 - 4.70E +0 11.3 mi SSW 3.79E+0 - 4.16E+0 1

Sr-90 2.00E +0 2.37E+0 (8/24) Fink's Farm 2.48E+0 (4/12) No Control N/A 24 1.38E+0 - 3.76E+0 7.0 mi SE I.38E+0 - 3.76E+0 l Gamna 24 l

K-40 3.00E+2 9.00E+2 (24/24) Fink's Farm 1.08E+3 (12/12) No Control N/A 1.20E+2 - 1.46E+3 7.0 mi SE 1.20E+2 - 1.46E+3

TABLE 2-1 ENUlRONMENTAL RADIOLOGICAL MONITORING PROGRAM SLNMARY H. B. Robinson Steam Electric Plant Docket Numbers 261 Darlington County, Sorth Caroline Calendar Year 1982 N ilu.a or Pathway Type and Minimum All Indicator Location w/ Highest Annual Nan Control Locations # of Nonroutine Sampled or Maasured Total # of Detectable Locations (2) Name Mean Mean Reported (Unit of Maasurenent) Measurements Activity Mean Distance & Range (2) Range (2) Measurements (3)

Performed (WA) (1) Rar.ge Direction Gamnu Milk 24 (pCi/ iller) Cs-137 9.00E+0 7.55E+0 (5/24) Fink's Farm 7.56E+0 (2/12) No Control N/A 4.47E+0 - 1.03E+1 7.0 ml SE 6.50E+0 - 8.63E+0 l

Soll Gross Data 9.00E-2 5.06E-1 (6/6) Hartsville 1.48E+0 No Control N/A (pC l/gran) dry 6 9.88E 1.48E+0 5.8 mi ESE (single value)

I C

Sr-89 2.7T-1 All less than K)A All less than M)A No Control N/A 4

Sr-90 1.30E-l 3.68E-1 (1/4) Black Creek 3.68E-1 (1/1) No Control N/A 4 (single value) at US I (single value) 5.1 mi ESE Gamma 8

K-40 2.30E-1 1.34E+0 (6/8) Ash Pond 3.27E+0 (2/2) No Control N/A 1.26E-l - 4.47E+0 9 ml NNW 2.08E+0 - 4.47E+0

TABLE 2-1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM SLM4ARY H. B. Robinson Steam Electric Plant Docket Numbers 261 Darlington County, Sorth Carolina Calendar Year 1982 Modium or Pathway Type and ktalmum All Indicator Location w/ Highest Annual Mean Control Locations # of Nonroutine Sampled or Maasured Total # of Detectable Locations (2) Name Mean Mean Reported (Unit of Haasuremmt) Measurements Activity Mean Distance & Range (2) Range (2) Measurements (3)

Porformed (M)A ) (l) Range Direction Gamnu Soli 8 (pCl/gran) dry Co-60 3.00E-2 2.02E+0 (2/8) Ash Pond 2.02E+0 (2/2) to Control N/A 6.37E 3.40E+0 0.9 mi NNW 6.37E 3.40E+0 l

l i

Cs-137 2.80E-2 2.97E-l (5/8) Hartsville 7.70E-1 (1/1) No Control N/A l Y 8.83E 7.70E-1 5.8 mi ESE (single value)

C Sur hce Water Gross Alpha 2.00E-1 1.22E+0 (117/221) Prestwood Lake 1.3X+0 (34/52) 1.10E+0 (24/52) N/A 273 II 4.42E 3.66E+0 4.9 ml ESE 5.27E 3.66E+0 4.50E 2.37E+0 (pel/ liter) l (Sainpled Wekly) l l

l Gross Beta 8.20E-l 1.59E+0 (193/221) Black Creek 1.68E+0 (55/65) 1.19E+0 (42/52) N/A l

273 II 5.42E 5.13E40 at Road 1623 7.93E 5.13E+0 4.9X-l - 2.33E+0 0.6 ml ESE Tritium 3.50E+2 7.19E+2 (160/221) Discharge Canal 7.81E+2 (40/52) 4.10E+2 (8/52) N/A 273 II 3.24E+2 - 2.58E+3 Outfal1 3.51E+2 - 2.26E+3 3.31E+2 - 4.94E+2 3.8 mi N

TABLE 2-1 ENVIR0 MENTAL RADIOLOnlCAL MONITORING PROGAM StM4ARY H. B. Robinson Steam Electric Plant Docket Numbers 261 Darlington County, Sorth Caroline Calendar Year 1982 Medium or Pathway Type and Minimum All Indicator Location w/ Highest Annual ban Control Locations # of Nonroutine Simpled or Measured Total # of Detectable Locations (2) Name Mean Mean Reported (Unit of Measurement) Measurements Activity Mean Distance & Range (2) Range (2) Measurements (3)

Performed (M) A ) (1) Range , Direction (Monthly Composite) Gross Alpha 2.0E-1 1.16E+0 (29/48) Prestwood Lake 1.21E+0 (7/12) 1.0lE+0 (3/12) N/A i 60 4.69E 2.27E+0 4.9 ml ESE 5.74E 1.73E+0 6,59E 1.32E+0 Gross Data 8.20E-1 1.55E+0 (47/48 Plant Intake 1.67E+0 (12/12) 1.3tE+0 (11/12) N/A 60 6.59E 2 +0 0.1 mi E 6.49E 2.3E +0 5.35E-l - 2.02E+0

/

1

, Sr-89 5.0T +0 2.0E +0 (1/48) Plant intake 2.0E +0 (1/12) All less than M)A N/A 60 (single value) 0.1 ml E (single value)

Sr-90 1.20E+0 5.56E+0 (3/48) Black Creek 8.61E+0 (1/12) 3.21E+0 (1/12) N/A 60 3.8 +0 - 8.6t +0 at Road 1623 (single value) (single salue) i 0.6 mi ESE ac t.. 2 IL kr Tritium 3.50E+2 6.54E+2 (43/48) Discharge Canal 7.51E+2 (11/12) 3.69E+2 (2/12) N/A

(;E i /i l tu.-) 60 4.31E +2 - 1.36E +3 Outfall 4.4 5E+2 - 1.36E+3 3.29E +2 - 4.1T+2 (iba t a ly Cc.....oa l te) 3.8 mi N I

I

TABLE 2-1 ENVIR0fNENTAL RADIOLOGICAL MONITORING PROGRAM SIM4ARY H. B. Robinson Steam Electric Plant Docket Numbers 261 Darlington County, Sorth Carolina Calendar Year 1982 I4dluia or Pathway Type and Minimum All Indicator Location w/ Highest Annual Mean Control locations # of Nonroutine Sampled or Maasured Total # of Detectable Locations (2) Name Mean Mean Reported (Unit of Ibasurenunt) Moosurements Activity Mean Distance & Range (2) Range (2) Measuremonts (3)

Performed (K)A ) (I) Range Direction Gamma Surfaco Water 72 (pCi/ liter) Cs-137 9.00E +0 5.29E+0 (4/60) Black Creek 5.84E+0 (t/12) All less than W A N/A (Monthly Composite) 4.44E+0 - 5.84E+0 at Road 1623 (single value) 0.6 ml ESE Surf ace Water Gross Alpha 2.00E-l 8.70E-1 (13/I6) Prestwood Lake 1.00E+0 (4/4) 6.79E-1 (3/4) N/A (pCl/ liter) 20 3.16E 1.30E+0 4.9 ml ESE 8.06E 1.26E+0 3.09E 1.31E+0 to 8

(Quarterly (n

Composite)

Gross Beta 8.20E-1 1.67E+0 (16/16) Prestwood Lake 1.76E+0 (4/4) 1.30E+0 (4/4) N/A 20 9.73E 2.30E+0 4.9 mi ESE 1.31E+0 - 2.20E+0 9.40E 1.95E+0 Tritium 3.50E+2 6.59E+2 (12/16) Discharge Canal 8.24E+2 (3/4) All less than MDA N/A 20 3.29E+2 - 1.06E+3 Outfall 6.80E+2 - 1.06E +3 3.8 mi N Gamm Surface Water 52 (pCl/llter) Mn-54 8.00E-3 3.77E-2 (8/52) Plant intake 3.77E-2 (8/52) No Control N/A

( l o.) Exchanga 1.57E 8.03E-2 0.1 mi E 1.57E 8.03E-2 Rosin)

TQBLE 2-1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM SLM4ARY H. B. Robinson Steam Electric Plant Docket Numbers 261 Darlington County, Sorth Carolina Calendar Year 1982 Madium or Pathway Typo and Minimum All Indicator Location w/ Highest Annual Mean Control Locations # of Nonroutine Sampled or Moesured Total e of Detectable Locations (2) Name Mean Mean Reported (Unit of flassuremont) Measurements Activity Mean Distance & Range (2) Range (2) Measurements (3)

Performed (WA) (I) Range DerectIon G<vams Surface Wator 52 (pCf/ liter) Co-58 9.0T-3 1.01E-1 (32/52) Plant intake 1.01E-1 (32/52) No Control N/A (lon Exchango 6.61E 2.50E-1 0.1 mi E 6.61E 2.50E-1 Rosin)

Co-60 9.00E-3 1.61E-1 (32/52) Plant intake 1.61E-1 (32/52) No Control N/A 1.08E 4.36E-1 0.1 ml E 1.08E 4.56E-1 Cs-137 9.0T-3 1.12E-1 (37/52) Plant Intake 1.12E-I (37/52) No Control N/A 2.71E 4.07E-l 0.1 ml E 2.71E 4.0'/E-1 Surfaco llater Gamr.a N/A All less than DOA All less than MDA No Control N/A (pCi/litcr) 52 (Glass Llool)

TLD TLD 3.00E-l I.91E+0 (749/249) Robinson Unit 1 4.65E+0 (12/12) 1.61E+0 (12/12) N/A (milliran por wk) 261 6.00E 7.30E+0 02 mi E 2.9T+0 - 7.30E+0 1.1 T+0 - 2.4T+0 i

F00Th0TES:

1. Calculated based on three standard deviations above background, using typical sample size in a given counting time. Due to counting statistics and varying volumes, occasionally lower minimum detectable activities are achieved.
2. Mean and range are based on detectable measurements only. The fractions

! of detectable measurements at specific locations are indicated in parentheses.

3. Measurements in excess, at the 99.5 percent confidence level of ten times the control station value or ten times the minimum detectable activity (MDA)--whichever is larger. Present cnvironmental technical specifica-tions do not require such reports.
4. Air particulate and charcoal cartridges are collected weekly for a possi-ble 364 samples. However, samples collected on January 18 and April 5 at Station 17 and Station 35 were unavailable due to burned-out compressor l

and to wind blowing air filter ir.to creek.

5. Third quarter bottom feeder flesh and bone samples were lost in analysis.

l

6. Tobacco samples (cured and uncured) are considered to be food crops.
7. Surface water was sampled twice a week at Station 11 during the first quarter of 1982 as a result of not having a composite sample. There was a total of 273 samples collected during 1982 of which 26 samples were for the first quarter at Station 11, plus 39 samples for the remaining three quarters, plus 4 other stations timer 52 weeks.
8. Three TLDs were reported as missing in the field: Stations 11, 30, and 12 for the month of October, September, and June, respectively.

l 2-17 l

3.0 INi:RPRETATION AND CONCLUSIONS 3.1 Air Samples Air samples collected during 1982 contained no unusual levels of radioactivity. Gross alpha concentrations were measurable in 301 of 310 samples, averaging 1.09 E-2 pC1/m 3 , compared to the control station average of 1.30 E-2 pCi/m3 Measurable gross beta l concentrat

  • 1. s were observed in 309 of 310 samples, averaging 2.39 E-2 pCi/m3 , compared to the control station average of 3.01 E-2 pCi/m3 . These levels are consistent with preoperational data obtained for the H. B. Robinson Plant. Graphs of the individual air sampling station (gross beta activity) compared to control station gross beta activity are included cs Figures 3-1 through 3-6 to demons- ate that all stations were comparable to the control station with no large deviation at any single location.

The monthly composite gamma and radiostrontium analyses for air particulate samples revealed only three radionuclides during 1982 as

( summarized in Table 3-1.

t i

3-1

Table 3-1 Radionuclides Detected During 1982 in Monthly Conposited Air Particulate Samples and Fractional Occurrence Month Location Radionuclides (pCi/m3 )

February Florence (1/12) Sr-89 2.90 E-3 March Microwave Tower (1/12) Sr-89 8.48 E-4 May Visitors Center (1/12) Sr-90 5.99 E-3 May Hartsville - Control (1/12) Sr-90 5.93 E-4 May End o' Construction Road Sr-89 West of Plant (1/12) 7.43 E-3 l

October Visitors Center (1/12) Cs-137 7.02 E-3 October Microwave Tower (1/12) Cs-137 3.91 E-3 l The concentrations and sporadic appearances of these radionuclides In

~

are consistent with ambient levels observed in recent years.

general, these radionuclides co not indicate the Robinson Plant as j thei r source since other shorter-lived fission products would

! likewise be detected in *.h m s r? les.

CP&L ENVIRONMENTAL MONITORING SYSTEM Figure 3-1 GROSS BETA A!R PARTIC'JLATE i

(PIC0 CURIES PER CUBIC METER)

STAR IS SAMPLE STATION ACTMTY DIAMOND IS CONTROL STATION ACTIVDY PLANT =HBR POINT =02 ACTIVITY

~

. o 0.0900 -- .

i

~

0.0600 - t

~

[{

f I

f l ./ A 0.ese0j [;. y l Q/ ~ q

.s, r j .

~

f e**bc,,,,,,,,,,,,,,v-,,,,,-,,,,,,,,-,,,,,,,,......,.......,.-,...,.......,.......,.....,......,

O 2 2 2 2 2 1 1 1 1 0 0 0 3 1 9 6 6 3 1 8 6 3 0 8 5 3 1 J J F M A M J J A S O N D D A A E A P A U U U E C 0 E E N N 8 R R Y N L G P T V C C 8 8 8 8 8 8 8 8 8 8 8 8 8 8 2 2 2 2 2 2 2 2 2 2 2 2 2 2 DATE

CP&L EtMRONMENTAL MONITORING SYSTEM ngure 3.-2 GROSS BETA AIR PARTICULATE (PIC0 CURIES PER CUBIC METER)

STAR IS SAMPLE STATION ACTIVITY DIAMOND IS CONTROL STATION ACTMTY PLANT =HBR POINT =09 ACTIVITY J

o 0.0900 -
x

- 1 0.0600 - ~

Y l

0.0300[ ~

{

i,

} .

O.0000 -

i....... ....... .......i.......i....... .......i.......i....... ....... ................................

0 2 2 2 2 2 1 1 1 1 0 0 0 3 1 9 6 6 3 1 8 6 3 0 8 5 5 1 J J F M A M J J A S O N D D A A E A P A U U U E C 0 E E N N B R R Y N L G P T V C C 8 8 8 8 8 8 8 8 8 8 8 8 8 8 2 2 2 2 2 2 2 2 2 2 2 2 2 2 DATE

CP&L EbMRONMENTAL MONITORING SYSTEM Figure 3-3 GROSS BETA AIR PARTICULATE (PICOCURIES PER CUBIC METER)

STAR IS SAMPLE STATION ACTIVITY DIAMOND IS CONTROL STATION ACTIVITY PLANT =HBR POINT =17 ACTIVITY

o 0.0900 -

J 0.0600 l _

j a _ }\

I t

0.0300 - 4

(

  • h m ,

1 h

0.0000 l ,......rp m n y.......,....... ....... ....... ....... .......................,....... ....... .......,

0 2 2 2 2 2 1 1 1 1 0 0 0 3 1 9 6 6 3 1 8 6 3 0 8 5 3 1 J J F M A M J J A S 0 N D D A A E A P A U U U E C 0 E E N N B R R Y N L G P T V C C 8 8 8 8 8 8 8 8 8 8 8 8 8 8 2 2 2 2 2 2 2 2 2 2 2 2 2 2 DATE

CP&L ENVIRONMENTAL MONITORING SYSTEM Figure 3-4 GROSS BETA AIR PARTICULATE (PIC0 CURIES PER CUBIC METER)

STAR IS SAMPLE STATION ACTIVITY DIAMOND IS CONTROL STATION ACTMTY PLANT =HBR POINT =34 ACTIVITY l

0.0900 w

0.0600i I a  : f.

0.0300 l _ 4 .

q

( A

~

A 0.0000 -

i....... ............... ............... ....... ............... ............... ....... ....... .......,

0 2 2 2 2 2 1 1 1 1 0 0 0 3 1 9 6 6 3 1 8 6 3 0 8 5 3 1 J J F M A M J J A S O N D D A A E A P A U U U E C 0 E E N N B R R Y N L G P T V C C 8

8 8 8 8 8 8 8 8 8 8 8 8 8 2 2 2 2 2 2 2 2 2 2 2 2 2 2 DATE

CP&L ENVIRONMENTAL MONITORING SYSTEM Figure 3-5 GROSS BETA A!R PARTICULATE (PIC0 CURIES PER CUBIC METER)

STAR IS SAMPLE STATION ACTMTY DIAMOND IS CONTROL STATION ACTMTY PLANT =HBR POINT =35 ACTIVITY 0.0900 l_ f

~

0.0600 - '

Y ~_ h a f 0.0300 - -

. q '

~

d-0.0000 -

. ............................. ....... ...................... ...... rn i i i 0 2 2 2 2 2 1 1 1 1 0 0 0 3 1 9 6 6 3 1 8 6 3 0 8 5 3 1 J J F M A M J J A S 0 N D D A A E A P A U U U E C 0 E E N N B R R Y N L G P T V C C 8 8 8 8 8 8 8 8 8 8 8 8 8 8 2 2 2 2 2 2 2 2 2 2 2 2 2 2 DATE

CP&L EbMRONMENTAL MONITORING SYSTEM rigure 3-6 GROSS BETA AIR PARTICULATE (P!C0 CURIES PER CUBIC METER)

STAR IS SAMPLE STATION ACTlVITf DIAMOND IS CONTROL STATION ACTMTY PLANT =HBR POINT =36 ACTIVITY 0.0900 0.0600 -

y

= .

~

/ /e 0.0300

.f4 1 l

~

0.0000 -

p ..... .......i....... ....... .......i.......i....... ....... ....... ....... ....... ....... .......,-

0 2 2 2 2 2 1 1 1 1 0 0 0 3 1 9 6 6 3 1 8 6 3 0 8 5 3 1 J J F M A M J J A S O N D D A A E A P A U U U E C 0 E E N N B R R Y N L G P T V C C 8 8 8 8 8 8 8 8 8 8 8 8 8 8 2 2 2 2 2 2 2 2 2 2 2 2 2 2 DATE

3.2 Aquatic Vegetation and Bottom Sediment Aquatic vegetation and bottom sediment samples are taken quarterly at five locations to monitor the expected effluent path from the Robinson Plant. An additional bottom sediment sample is taken quarterly at the plant intake. Monthly bottom sediment and aquatic vegetation samples are taken from the open ditch (Station 33) near the Visitors Center in order to monitor any liquid effluent from those locations where only I low-level activity concentrations are expected.

Gamma analyses revealed the continued presence of several radionuclides predominant in plant liquid effluent as well as fission products attributed to old debris from nuclear testing. These radionuclides are summarized in Table 3-2.

Table 3-2 Average Concentration (pCi/g dry) and Fractional Occurrences of Radionuclides in Bottom Sediment and Aquatic Vegetation BOTTOM SEDIMENT i

Annual Average Location with Highest Isotope (pCi/g dry) Annual Mean Co-60 3.040 (19/32) SD-33 l Sr-89 0.100 (1/32) S0-5

! Sr-90 0.275 (5/32) SD-33 l Cs-137 0.522 (21/32) SD-33 Ce-141 0.223 (1/32) SD-11 l

l 3-9

Table 3-2 (Continued)

AQUATIC VEGETATION Annual Average Location with Highest Isotope (pCi/g dry) Annual Mean

, Mn-54 0.275 (5/32) AV-8 1

Co-58 0.680 (9/32) AV-8 Co-60 0.879 (11/32) AV-8 Sr-89 0.202 (5/28) AV-21 Sr-90 0.099 (7/28) AV-8 Nb-95 0.168 (1/32) AV-21 Cs-134 0.364 (3/32) AV-33 Cs-137 1.030 (28/32) AV-33 Ce-144 0.733 (4/32) AV-21 Most occurrences of activity observed were at Station 33. The activity at this location is lower than previous years and is within the confines of the plant. It discharges just below the spillway where the general public has minimum access. The samples collected at Station 11, located approximately 200 yards downstream from the discharge point of Station 33, showed no significant increases in comparison to previous data. Bottom sediments and aquatic vegetation are not con-sumed by man but are useful for documentation of trends in plant effluent. Review of past data indicates that there is no continuous increase in the concentrations observed at any l

sampling locations.

3-10

3.3 Fish Fish samples are analyzed quarterly for radiostrontium and gamma-emitting radionuclides. Strontium-89 was observed once in free swimmers during the fourth quarter of 1982 and once in bottom feeders during the first quarter of 1982 at the concentration of 0.538 pCi/g (dry) and 0.610 pCi/g (d ry ) ,

respectively. The concomitant dose to man is insignificant

(<0.001 mrem / year) .

The strontium-90 and cesium-137 continued to manifest itself in fish flesh as summarized in Table 3-3.

Table 3-3 Average Concentration of Radionuclides in Fish Flesh (pCi/ gram dry)

Radionuclide Bottom Feeders Free Swinners Sr-90 0.460 (3/3) 0.184 (3/4)

Cs-137 0.575 (3/3) 0.698 (4/4)

It is worthy of note that strontium-90 and cesium-137

concentrations are lower IA comparison to previous years.

i During the fourth quarter of 1982, a special study was performed to evaluate the strontium-90 and cesium-137 activity in fish samples. Samples were collected from Lake Bee (9.0 miles NW) which is totally unafft ted by nuclear operations of H. B. Robinson. These special samples, as well as the usual quarterly Lake Robinson samples, were separated by species and analyzed for strontium-90 and cesium-137. These results are l compared in Table 3-4.

2-11

Table 3-4 Fish in Lake Bee Compared to Fish in H. B. Robinson Lake (pCi/kg wet)

Collection H. B. Robinson Date Species Radionuclide Lake Bee Lake l

10/18/82 Chub Sucker Cs-137 133.0 290.0 Sr-90 344.0 227.0 10/18/82 Sun Fish Cs-137 116.0 311.0 Sr-90 732.0 150.0 10/18/82 Large Mouth Bass Cs-137 259.0 No Sample Sr-90 120.0 No Sample 10/18/82 Pickeral Cs-137 No Sample 336.0 Sr-90 No Sample 359.0 10/18/82 Yellow Bull Head Cs-137 346.0 231.0 Sr-90 49.1 80.8 11/10/82 Spotted Sucker Cs-137 No Sample 37.2 Sr-90 No Sample 117.0 1

(

3-12

Table 3 (Continued)

Fish in Lake Bee Compared to Fish in H. B. Robinson Lake (pCi/kg wet)

Collection H. B. Robinson Date Species Radionuclide Lake Bee Lake 11/10/82 Chub Sucker Cs-137 *173.0 72.1 Sr-90 *353.0 89.0 11/10/82 Sunfish Cs-137 *184.0 No Sample Sr-90 *504.0 No Sample 11/10/82 Pickeral Cs-137 *394.0 309.0 Sr-90 *368.0 66.4 12/01/82 Bass Cs-137 318.0 No Sample Sr-90 178.0 No Sample

  • Collected on 12/01/82 t

I 3-13

A statistical t-test

  • was performed on cesium-137 and strontium-90 data for bottom feeders and free swimmers to determine if fish from Lake Robinson exhibited significantly higher concentrations of these radionuclides than those observed in fish from Lake Bee. At the 95 percent confidence level, no significant difference was determined to exist.
  • This test was performed as described by Section 3-3.2, Page 3-4, Exoerimental S ta ti stics, Handbook 91, Uni ted States Department of Commerce, nacional Bureau of Standard s ,

August 1, 1963.

3-14

3.4 Yegetation Cattle feed (F0) and locally grown food crops (FC) were sampled and analyzed for gamma-emitting radionuclides. The only radionuclide detected was cesium-137 as summarized in Table 3-5. The l ow-level cesium-137 activity detected is believed to be attributable to contamination of the Ge(Li) detectors at the time of analysis.

Table 3-5 Average Concentration (pCi/g dry) and Fractional Occurrences of Radionuclides in Cattle Feed and Food Crops Cattle Feed (FO)

Isotope Annual Avg. (pCi/g) Fractional Occurrence Cs-137 0.265 3/4 Food Crop (FC)

Isotope Annual Avg. (pCi/g) Fractional Occurrence Cs-137 0.352 3/6 3-15

~

3.5 Groundwater Quarterly groundwater samples for all three sampling stations showed no indication of plant-contributed radioactivity.

Gross alpha activity was observed in 8 of 12 samples averaging 9.74 E-1 pCi/1. Gross beta activity was detected in 9 of 12 samples averaging 9.44 E-1 pCi/1. This average is comparable to data obtained during preoperational surveillance. Radio-strontium analyses revealed no measurable activity. Tritium was detected in 2 of 12 analyses at an average concentration of 211 pCi/1 with high relative counting errors. This average is considerably lower than the normal minimum detectable activity of 350 pCi/1. Gamma analyses revealed cesium-137 activity at an average concentration of 7.35 pCi/l in 2 of 12 samples. This is not possible since it is 7 times higher than the gross beta analysis. Again, contamination is suspected.

Subsequent samples contained no detectable levels of cesium-137.

3.6 Milk samples Monthly milk samples were taken at two locations and analyzed for radiciodine, radiostrontium, and gamma-emitting radionuclides.

Radiochemical determination of I-131 yielded measurable activity in 3 of 24 samples analyzed. For the collection periods of 4/19/82, 5/10/82, and 9/13/82, iodine-131 activity concentrations were 0.49 pCi/1, 0.96 pCf /1, and 0.623 pCf /1, respectively. The samples collected on 4/19/82 and 9/13/82 were counted by a low-beta counter. These activities were at or below the required minimum detectable activity of 0.5 pCi/1 and appears to be statistical artifacts. The sample collected on 5/10/82 was counted by a beta-gamma coincidence systen.

This system was recalibrated using a new detector and standard 3-16

on 5/3/82. It appears in retrospect that this sample was analyzed immediately following a QC check and may be attributed to contamination of the detector.

Radiostrontium analyses of milk revealed Sr-89 in 4 of 24 samples averaging 3.65 pCi/1. Strontium-90 was detected in 8 of 24 samples averaging 2.37 pCi/1. These concentrations are in agreement with averages from previous years and do not indicate that the Robinson operation affects the milk pathway to man during 1982.

Gamma isotopic analyses detected Cs-137 in 5 of the 24 samples averaging 7.55 pCi/1. These levels of Cs-137 in milk are representative of data obtained over the last several years and reflect the accumulation of debris from old and recent nuclear weapons testing.

3.7 Soil Samples Ten sampling locations are sampled every three years. Two sample locations are sampled semiannually on a rotating basis. During 1982, Station 2 (Visitors Center), Station 9 (Microwave Tower), Station 22 (Hartsville), and Station 24 (Black Creek at U.S. 1) were sampled and analyzed for gross beta, strontium, and gamma emitters.

Station 49 (East Shore of Lake at Boat Launch) is sampled semiannually as shoreline sediment and is analyzed for gross beta and gamma emitters. In addition, Station 50 (Ash Pond) was added to the sampling program in 1981. This station is sampled semiannually and analyzed for gamma-emitting radionuclides. Station 50 is located within the site boundary and was added to the environmental program as a directive from l the Company's Nuclear Safety and Research Department.

3-17

[

Gross beta activities were detected in 6 of 6 samples analyzed averaging 5.06 E-1 pCi/g. This is in agreement with gross beta activities observed on the same sample type during preoperational surveillance. Gamma analyses revealed cesium-137 in 5 of 8 samples analyzed. All concentrations observed were comparable to previous data reported for the area.

Low levels of Co-60 and Cs-137 were detected at Station 50.

Since this is a new station, there is no previous data with which to compare the activities measured. The results are comparable to those observed in bottom sediment sampled at Station 33 which is also located on site.

3.8 Surface Water Gross alpha and gross beta activities in weekly surface water samples were generally consistent with previous surveillance data. Gross alpha concentrations were measurable in 117 of 221 samples analyzed. The average of 1.22 E+0 pCi/l was comparable to the control station average of 1.10 E+0 pCi/1.

Measurable gross beta conceatrations were reported in 193 of 221 samples averaging 1.59 E+0 pCi/1. These gross beta acti vities are comparable to the average of 4.08 E+0 pC1/1 reported during preoperational surveillance. These activities were consistent at all stations, with no one station showing significant deviation as shown in Figures 3-7 through 3-10.

1 tionthly composites of the weekly samples showed measurable gross alpha and beta activities in 29 of 48 and 47 of 48 cases, respectively. The average concentration for gross alpha and gross beta in these samples was 1.16 E+0 pCi/1 and 1.55 E+0 pCi/1, respectively. These compare favorably with the control station averages of 1.01 E+0 pCi/l and 1.31 E + 0 pCi/l for gross alpha and gross beta, respectively.

3-18

Quarterly composites of the monthly composites reve61ed measurable alpha and beta activities similiar to the monthly samples. Gross alpha activity was detected in 13 of 16 samples, averaging 8.70 E-1 pCi/1 compared to 6.79 E-1 pCi/1 at the control station. Measurable gross beta activity was observed in 16 of 16 samples averaging 1.67 E40 pCi/1. This is comparable to 1.30 E+0 pCi/l detected at the control location.

I i Tritium acti vity concentrations were determined in weekly samples, monthly composites, and quarterly composites. The tritium measured in the composites was consistent with that reported in samples from which the composites were made. All activities are comparable to previous data revealing no increase in acti vity. The tritium data is summarized by station below:

Tritium Concentrations (pCi/1)

Weekly Samples SW-5 SW-8 SW-11 SW-32 Average 703 781 729 650 Range 337-1830 351-2260 324-2580 331-1590 Monthly Conposite i

Average 652 751 598 614 Range 484-911 445-1360 431-794 431-1150 Quarterly Composite Average 632 824 636 497 Range 507-766 680-1060 435-808 329-665 3-19

Specific isotopic analyses of monthly surface water composites were accomplished through high resolution gamma spectrometry. In 68 of 72 samples analyzed, no fi:sion or activation products were measurable. The four exceptions are given below:

Cs-137 pC1/1 September Composite SW-11 5.84

  • 1.28 November Composite SW-05 5.26
  • 1.24 SW-08 4.44
  • 1.26 SW-50 5.64
  • 1.53 The sporadic appearance of cesium-137 in several isolated cases does not clearly indicate the Robinson Plant as the source. The activities observed are below the typical minimum detectable activity of 9.0 pCi/l with high relative counting errors.

I Radiostrontium analyses of monthly composited surface water samples revealed a single incidence of Sr-89 activity at the concentration of 2.00 pCi/1 during May at Station 5. Strontium-90 activity was quantified in 3 of 60 analyses at an average concentration at Station 5 at a concentration of 5.56 pCi/l. The sporadic appearance I of strontium-90 in surface water does not clearly indicate the Robinson Plant as the source.

The measurement of very low levels of fission and activation products in lake water was also performed during the year. Weekly samples on the order of several thousand liters were concentrated on mixed bed ion exchange resin (for ion collection) and glasswool (for suspended particulate collection). Thus, the analytical sensitivity for gamma isotopic analyses was improved sufficiently to allow measurement of many fission and activation products. The radionuclides measured by this method are listed in Table 3-6.

3-20

Table 3-6 Ion Exchange Resin (pCi/1)

Average High Low Radionuclide Occurrence (pCi/1) (pCi/1) (pCi/1)

Mn-54 8/52 3.77 E-2 8.03 E-2 1.57 E-2 Co-58 32/52 1.01 E-1 2.50 E-1 6.61 E-3 Co-60 32/52 1.61 E-1 4.36 E-1 1.08 E-2 Cs-137 37/52 1.12 E-1 4.07 E-1 2.71 E-2 Comparison of radionuclide concentrations collected on the resin and glasswool indicates a much greater fraction of the radionuclides appear in ionic form rather than as suspended particulates.

l 4

3-21

CP&L ENVIRONMENTAL MONITORING SYSTEM rtaure 3-7 GROSS BETA SURFACE WATER (P!C0 CURIES PER LITER)

STAR IS SAMPLE STATION A0TMTY DIAMOND IS CONTROL STATION ACTIVnY PLANT =HBR POINT =05 ACTIVITY 6.0000 -

~

c 4.0000 f Y I p  :

.  : c N 2.0000 - /

%.g

+u :

ig?'

W[

~ '

3

'~

<(g ~

e ,

%, /. .

.y

..x .

A .

L~

0.0000 - ..r....;.......

i....... .......i.......i.......i.......i.......i....... ....... ....... .... ..i.......i 0 2 2 2 2 2 1 1 1 1 0 0 0 3 1 9 6 6 3 1 8 6 3 0 8 5 3 1 J J F M A M J J A S O N D D A A E A P A U U U E C 0 E E N N B R R Y N L G P T V C C 8 8 8 8 8 8 8 8 8 8 8 8 8 8 2 2 2 2 2 2 2 2 2 2 2 2 2 2 DATE

CP&L ENVIRONMENTAL MONITORING SYSTEM rigure 3-8 GROSS BETA SURFACE WATER (PIC0 CURIES PER LITER)

STAR IS SAMPLE STAT!ON ACTMTY DIAMOND IS CONTROL STATION ACTNTTY PLANT =HBR POINT =08 ACTIVITY 6.0000 -

4.0000f b 2.0000 - I' -

4 i

~

f v U
- u l<

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0.0000 -

i....... ....... ............... ............................... ....................... ....... .......,

i 0 2 2 2 2 2 1 1 1 1 0 0 0 3 1 9 6 6 3 1 8 6 3 0 8 5 3 1 J J F M A M J J A S 0 N D D A A E A P A U U U E C 0 E E i N N B R R Y N L G P T V C C 8 8 8 8 8 8 8 8 8 8 8 8 8 8 2 2 2 2 2 2 2 2 2 2 2 2 2 2 DATE

CP&L ENVIRONMENTAL MONITORING SYSTEM Figure 3-9 GROSS BETA SURFACE WATER (PIC0 CUR!ES PER LITER)

STAR !S SAMPLE STATION ACTIVITY DIAMOND IS CONTROL STATION ACTMTY PLANT =HBR POINT =11 ACTIVITY 6.0000 --

x 4.0000 m

b .

)

g. ;k h 0.0000 - ,...........n.......... ...n.. ....... ... m y.......n.............. .......,....... ...............,

0 2 2 2 2 2 1 1 1 1 0 0 0 3 1 9 6 6 3 1 8 6 3 0 8 5 3 1 J J F M A M J J A S 0 N D D A A E A P A U U U E C 0 E E N N B R R Y N L G P T V C C 8 8 8 8 8 8 8 8 8 8 8 8 8 8 2 2 2 2 2 2 2 2 2 2 2 2 2 2 DATE

CP&L ENVIRONMENTAL MONITORING SYSTEM Figure 3-10 GROSS BETA SURFACE WATER (P!C0 CURIES PER LITER)

STAR IS SAMPLE STAT!ON ACTMTY D!AMOND IS CONTROL STATION ACTMTY PLANT =HBR POINT =32 ACTIVITY 6.0000 -

eu 4.0000h J

5 2.0000 ,

,["

3 ,,

qf-  :

g

~'

,, / ~ / .< s shf%l+*

O.0000

......... .......,....... ....... ....... .......,...............g ...... ....... .......,.......,.......,

0 2 2 2 2 2 1 1 1 1 0 0 0 3 1 9 6 6 3 1 8 6 3 0 8 5 3 1 J J F M A M J J A S 0 N D D A A E A P A U U U E C 0 E E N N B R R Y N L G P T V C C 8 8 8 8 8 8 8 8 8 8 8 8 8 8 2 2 2 2 2 2 2 2 2 2 2 2 2 2 DATE

3.9 Thermoluminescent Dosimetry Area Monitors The average dose rate from all indicator stations 1.91 mrem /wk which is comparable to the control station average of 1.61 mrem /wk. The only significantly higher reading was observed at Station 7 (Robinson Unit 1). This station has tradition-ally exhibited higher readings and shows no significant change from previous years.

3.10 Sununary In summary, the following statements can be made in regard to all radioactive effluents (air particul ate, gaseous, and 4 liquid) from the H. B. Robinson Steam Electric Plant:

1. All detectable radioactivities have been below the levels set forth in the Code of Federal Regulations, Title 10, Part 20.
2. The radioactivity released from the H. B. Robinson Steam Electric Plant has not significantly increased the amount of radioactivity detected in the environs surrounding the plant.
3. The environmental analyses performed during 1982 demon-strate that the H. B. Robinson Steam Electric Plant and the environment can exist in harmony and produce electri-city safely while ensuring the safety of the general public.

3-26

4.0 MISSED SAffLES AND ANALYSES 4.1 Air Particulate (Weekly)

Samples collected January 18, 1982, and April 5, 1982, at Station 17 and Station 35 were unavailable due to a burned out compressor and due to wind blowing air filter into creek, respectively. {

4.2 Fish Third quarter bottom feeder flesh and bone samples were lost in analysis.

l 4.3 Environmental TLDs The following thermoluminescent dosimeter results were missing in 1982:

- Month Sample Station Reason January 12 Badge Lost in Field September 30 Badge Lost in Field October 11 Badge Lost in Field l

4-1

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