ML20029C964
| ML20029C964 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 12/31/1993 |
| From: | Redeker S SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| To: | Callan L NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| MPC&D-94-034, MPC&D-94-34, NUDOCS 9405030109 | |
| Download: ML20029C964 (84) | |
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$SMUD SACRAMENTO MUNICIPAL UTILITY DISTRICT : ! P. O. Box 15830, Sacramento CA 95852-1830,(916) 452-3211 MPC&D 94-034 AN ELECTRIC SYSTEM SERVING THE HEART OF CALIFORNIA April 26, 1994 U. S. Nuclear Regulatory Commission Attn: L. J. Callan, Regional Administrator Region IV Parkway Central Plaza Building 611 Ryan Plaza Building, Suite 400 Arlington, Texas 76011-4085 Docket No. 50-312 Rancho Seco Nuclear Station License No. DPR-54 1993 RANCHO SECO ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT
Dear Mr. Callan:
Enclosed is the Rancho Seco 1993 Annual Radiological Environmental Operating Report (AREOR). The enclosed report contains the information outlined in Rancho Seco Permanently Defueled Technical Specification (PDTS)
D6.9.2.3, Annual Radiological Environmental Operating Report.
Members of your staff requiring additional information or clarification may contact Steve Nicolls at (916) 452-3211, extension 4292.
Sincerely,
\\t
\\ta Steve J. Redeker Manager Plant Closure & Decommissioning Enclosure cc w/atch:
Document Control Desk, NRC, Washington D.C. 20555 M. Cillis, NRC, Walnut Creek T. Markley, NRC, Rockville
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PDR RANCHO SECO NUCLEAR GENERATING STATION O 14440 Twin Cities Road, Herald, CA 95638 9799;(209) 333 2935
AXSUAL RADIOLOGICAL ESVIRONMESTAL OPERA'11NG REPORT 7__
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. ANUARY - DECEMBER 1993
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Rancho Seco Nuclear Station Herald, California License Number DPR-54
1993 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT TABLE OF CONTENTS Section Title Paae TABLE OF CONTENTS i
LIST OF FIGURES ii LIST OF TABLES iii I.
EXECUTIVE
SUMMARY
1 11.
LAND USE CENSUS 2
111.
RADIOLOGICAL IMPACT EVALUATION 2
Predicted Potential Radiological Impact 2
Fuel Cycle Dose Evaluation
.3 Observed Potential Radiological Impact 3
IV.
PROGRAM ANALYSIS RESULTS
SUMMARY
6 A
Atmospheric Monitoring 6
B Direct Radiation Monitoring ~
7 C
Terrestrial Monitoring 7
D Aquatic Life Monitoring 8
E Water Monitoring 9
V.
REFERENCES 19 VI.
APPENDICES 21 A
1993 Land Use Census A-1 B
Sample Site Descriptions and Maps B-1 C
Quality Control Sample Analysis Results C-1 D
Sample Collection and Analysis Methods D E Environmental Monitoring Program Design E-1 F
Sample Analysis Raw Data Tables F-1 G
Missed Sample Report G-1 Rancho Seco i
1993 AREOR
LIST OF FIGURES Flaure Title Pace B1 Radiological Environmental Monitoring Sites
- Site Locations (Storm Drain Locations)
B-3 B-2 Radiological Environmental Monitoring Sites
- 1 Mile Radius Map B-4 B-3 Radiological Environmental Monitoring Sites
- 5 Mile Radius Map B-5 B-4 Radiological Environmental Monitoring Sites
- 25 Mile Radius Map B-6 Rancho Seco il 1993 AREOR
1 LIST OF TABLES i
Table Title Pace 1
1993 Liquid Effluent Pathway Potential Dose Comparison (maximally exposed group analysis) 5 2
1993 Sample Analysis Results Summary 11 B-1 Radiological Environmental Monitoring Sites B-7 C-1 EPA Interlaboratory Comparison Program
- Statistical Summary C-4 E-1 Reporting Levels for Radioactivity Concentrations Found in Environmental Samples E-11 E2 Maximum LLD Values for Environmental Samples E 12 F-1 1993 Annual Summary - Gross Beta Radior:tivity in Air, Weekly Particulate F-2 F-2 1993 Annual Summary - Quarterly Exposare at TLD Locations F-4 F-3 1993 Annual Summary - Garden Vegetables F-5 F4 1993 Annual Summary - Raw Milk F-6 F-5 1993 Annual Summary - Soil and Sediment F-8 F-6 1993 Annual Summary - Fish F-11 F-7 1993 Annual Summary-Algae F-12 F-8 1993 Annual Summary - Well Water F-13 F-9 1993 Annual Summary - Runoff Water F-14 F-10 1993 Annual Summary - Surface Water F-17 4
F-it 1993 Annual Summary - Drinking Water F-23 F-12 1993 Annual Summary - Rain Water F 24 Rancho Seco iii 1993 AREOR
1993 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT l.
EXECUTIVE
SUMMARY
This report contains results from the Radiological Environmental Monitoring Program (REMP) for the Rancho Seco Nuclear Station (RSNS) compiled for the period January 1,1993 through December 31,1993. This program is conducted by the Radiation Protection / Chemistry Group at RSNS and is conducted in accordance with section D6.8.3.b of the RSNS Permanently Defueled Technical Specifications.
The results of the 1993 Radiological Environmental Monitoring Program showed that the operation of RSNS had no significant radiologicalimpact en the environment.
l On June 7,1989, as mandated by public referendum, actions were taken to discontinue the operation of the Rancho Seco Nuclear Generating Station. These actions included placing the Station in a cold shutdown condition and defueling the reactor which was completed in December 1989. Currently the Plant is in a Custodial SAFSTOR condition. Preparations are being made to place the Plant in a Hardened SAFSTOR condition. The Hardened SAFSTOR condition requires the Spent Fuel to be placed in an onsite dry storage facility. The Proposed Decommissioning Plan was submitted to the Nuclear Regulatory Commission and is currently under review.
During the reporting period, aie atmospheric, terrestrial and aquatic environs adjacent to RSNS were monitored. The sample measurements showed that the levels of radioactivity in the sampled media were consistent with previous evaluations and Station operations. A!! positively detected results were well below the reporting levels.
Doses resulting from ambient exposure to terrestrial and atmospheric direct radiation sources were measured through the placement and retrieval of thermoluminescent dosimeters (TLDs). Direct radiation measurements attributable to Station operations, based on control and indicator locations, were indistinguishable above background levels.
Isotopic identifications were consistent with known releases of radioactive material from the Station to the atmospheric and aquatic environments. As expected, samples obtained from the aquatic environment of the Clay, Hadselville, and Laguna Creeks contributed the majority of positive isotopic identifications. Cobalt-60, Cesium-134, and Cesium-137 were the predominant nuclides identified in the aquatic environment. Nuclides of Station origin were not detected in the gaseous effluent exposure pathways.
Rancho Seco 1
1993 AREOR
1 II.
LAND USE CENSUS The 1993 Land Use Census was conducted in accordance with the Rancho Seco Permanently Defueled Technical Specification (PDTS) section D.6.8.3.b.2 and Radiological Enviror mental Monitoring Prograne (REMP) manual section 4.0. The 1993 Land Use Census did not identify any changes in the use of the unrestricted areas that would require modification to the REMP for evaluating doses to individuals from principal pathways of exposure. This evaluation and determination is in accordance with the requirements of 10CFR50, Appendix 1, section IV.B.3.
Ill.
RADIOLOGICAL IMPACT EVALUATION PREDICTED POTENTIAL RADIOLOGICAL IMPACT Gaseous Effluent Exposure Pathways The maximum predicted potential annual organ dose commitment due to gaseous releases of tntium and particulate isotopes was 0.24 mrem (as calculated using Rancho Seco Offsite Dose Calculation Manual (ODCM)). This predicted potential organ dose commitment was 1.6% of the associated PDTS limit (10CFR50, Appendix 1 guideline).
Since no detected noble gas activity was released from RSNS during 1993, there is no predicted gamma or beta air dose calculation from the ODCM. Therefore, the predicted air doses were within the applicable PDTS limits (10CFR50, Appendix I guidelines).
Liauid Effluent Exposure Pathways During 1993,1.41 E+07 liters of waste water were released into "No Name" Creek from the two onsite Retention Basins. This volume of waste water was dispersed into 1.68 E+10 liters of dilution water. The estimated error associated with determining these volumes was 5% and 10%,
respectively.
The Liquid source term resulted in a predicted potential annual adult total body dose commitment of 0.17 mrem and a predicted potential child liver dose commitment of 0.32 mrem (as calculated using the ODCM). These predicted potential dose commitments were 5.6% and 3.2%, respectively, of the associated PDTS limits (10CFR50, Appendix I guidelines). The dose commitments reflect the age groups that could have received the highest annual dose commitment from the liquid source term.
Rancho Seco 2
1993 AREOR 9
ill RADIOLOGICAL IMPACT EVALUATION (continued)
FUEL CYCLE DOSE EVALUATION PDTS section D6.9.2.3 [NRC74) requires each Annual Radiological Environmental Operating Report (AREOR) to indude information related to REMP manual section 5.0; Fuel Cycle Dose. The Fuel Cycle Dose Specification limits the dose or dose commitment to any.real member of the public e
to 25 mrem to the total body or any organ, except the thyroid which is limited to 75 mrem. Tw,r specification implements requirements promulgated by the United States Environmental Protection Agency [CFRd).
Consistent with REMP manual section 5.0, no fuel cycle dose evaluation was required to be performed during 1993 since no REMP measurement exceeded the established reporting levels.
Additionally, the Station effluent dose predictions did not exceed twice the dose guidelines of 10CFR50, Appendix l [CFRc]. The station operated within the Appendix ! guidelines envelope for radioactive effluents (a condition supported by Program measurements); therefore, determination of an actual dose commitment delivered to a real member of the public was not required.
OBSERVED POTENTIAL RADIOLOGICAL IMPACT Gaseous Effluent Exposure Pathways Due to substantial atmospheric dispersion and deposition effects, it is not expected to be possible to correlate envirorimental sample (REMP) results with predictions made using the source terms determined from the gaseous effluent monitoring program (ODi This expectation was realized during 1993 as none of the REMP gaseous effluent pathway ga ama isotopic analysis results indicated the presence of nuclides of Station origin. However, since the predicted effluent dose commitment calculations utilize conservative (default) parameters, it is anticipated that observed potential dose commitments determined using measured (gross beta) airbome particulate results (which are primarely due to naturally occuring radioisotopes) would yield a dose commitment that is significantly less than the predicted potential organ dose commitment of approximately 0.24 mrem
[RS938).
Direct Radiation Exposure Pathway Based on thermoluminescent dosimeter (TLD) control and indicator locations measurement results obtained during 1993, the Station proper did not contribute an observable component to the recorded direct gamma radiation field. This TLD data not only supports the Gaseous Effluent Exposure Pathway conclusions, but determines that the Plant has no direct radiation effect on the environme.nt in the immediate vicinity of the site.
Rancho Seco 3
1993 AREOR
l11.
RADIOLOGICAL IMPACT EVALUATION (continued)
OBSERVED POTENTIAL RADIOLOGICAL IMPACT Liouid Effluent Exposure Pathways To evaluate more accurately the impact on the environment from the liquid effluent pathway, dose commitment calculations were performed and compared with the annual dose commitment predictions reported in the July - December 1993 Rancho Seco Semiannual Radioactive Effluent Release Report [RS938). The observed results presented in Table 1 were obtained using the average, positive activity concentrations identified in fish (Appendix F, Table F-6), default consumption quantities (ODCM) and nuclide-specific dose factors [NRC77). The results obtained in these analysis compare favorably. Considering the assumptions made in estimating observed potential doses noted below, it is evident that the Station's radioactive liquid effluents management program remained effective throughout 1993.
The observed potential dose commitments listed in Table 1 are subject to uncertainty, principally due to the assumption that the predicted radioactivity was due to 1993 Station operations only and was not affected by radioactivity introduced into the environment prior to 1993. A major portion of the activity identified by Program measurements in 1993 is attributable to historical releases documented in previous annual reports, as well worldwide weapons testing and major global nuclear accidents. Additionally, the observed dose commitment calculations are based on conservative default consumptien factors for fish.
The 1993 Land Use Census did not indicate the potential for an exposure pathway other than the aquatic / fish pathway.
Rancho Seco 4
1993 AREOR
111.
RADIOLOGICAL IMPACT EVALUATION (continued)
OBSERVED POTENTIAL RADIOLOGICAL IMPACT TABLE 1 1993 Liquid Effluent Pathway Potential Dose Comparison POTENTIAL DOSE COMMITMENT (based on the maximally exposed group)
PREDICTED DOSE COMMITMENT (a)
OBSERVED DOSE COMMITMENT (b)
(mrem)
(mrem) 0.17 0.05 (adult's total body)
(adult's total body) 0.32 0.08 (child's liver)
(adult's liver)
Notes:
(a)
Estimated by the Offsite Dose Calculation Manual (ODCM)
(using source terms without dilution water factored in)
(b)
Estimated using Appendix F, Table F-7; observed average positive values for fish samples Rancho Seco 5
1993 AREOR
i IV.
PROGRAM ANALYSIS RESULTS
SUMMARY
This section compiles all Program data with corresponding evaluations. Each of the following five subsections presents information about each of the principal environmental exposure pathways monitored by the Program:
=> Atmospheric (Section IV-A)
=> Direct Radiation (Section IV-B)
=> Terrestrial (Section IV-C)
=> Aquatic Life (Section IV-D)
=> Water (Section IV-E)
Each of these sections contains a data evaluation subsection which provide a summary of the data collected.
Table 2 is a comprehensive, all-media data summary presented in a format considered acceptable by the US Nuclear Regulatory Commission. Information contained in Table 2 was derived from data presented in Appendix F.
IV-A. ATMOSPHERIC MONITORING DATA EVALUATION No radionuclides attributable to the operation of Rancho Seco were observed in gamma spectrometry analyses of the quarterly composites of the particulate filters. No table is presented for this data since all the data were reported as being below the associated minimum detectable activity for the nuclides of interest.
The data indicates that there was no measurable contribution to the airbome radioactivity inventory which could reasonably be attributable to Station operations.
The results of the gross beta analyses of the particulate samples are given in Appendix F, Table F-1.
1993 AREOR 6
Rancho Seco I
IV-B. DIRECT RADIATION MONITORING DATA EVALUATION A comparison review of all TLD data 'or the indicator and control locations during 1993 showed that there was no obsentable direct !adiation component due to Station operations (i.e.,
storage or utilization of licensed rrJioactive material vnthin the restricted area (industrial Area Boundary)).
The summary data for 1993 is presented in Table 2. Comprehensive data tables are given in Appendix F Table F-2.
l IV-C. TERRESTRIAL MONITORING DATA EVALUATION Garden Vegetation - 15 routine garden vegetation samples were collected and analyzed for nuclides of interest during 1993. Cs-137 ( 1 sample,18 pCi\\ kg) was detected by gamma spectrometry analysis. The positive result was obtained at the site boundary irrigated garden which is maintained by the Program. The positive result could be attributed to historical releases or to Cs-137 fat'out sources. A site boundary irrigated garden has been evaluated to be a conservative method for evaluating the liquid effluent pathway. This method meets the requirement of the Land Use Census for monitoring gardens.
Milk - 16 routine milk samples were collected and analyzed for nuclides of interest during 1993. Quality assurance (QA) samples were collected on a quarterly frequency. No fission or activation product nuclides were identified by gamma spectrometry.
Soil (discharge canal)- 8 routine soil samples were collected and analyzed for nuclides of interest from the effluent discharge canal and downstream creeks during 1993. Cs-137 (8 samples,100 to 3256 pCi/kg,1111 pCi/kg mean), Co-60 (6 samples,19 to 850 pCi/kg,363 pCi/kg mean), and Cs-134 (5 samples,14 to 73 pCi/kg,42 pCi/kg mean) were detected by the analyses. The remaining nuclide identifications were numencally below the required LLD-equivalent activity concentration. The presence of the identified nuclides could be attributed to historical Station operations and Cs-137 fallout sources. The decay trend for these locations is as anticipated.
i Soil (storm drain outfall)- 24 soil samples were collected from 12 storm drain outfall locations during 1993. These outfalls are located along the perimeter of the Industrial Area Boundary (Restricted Area) and receive site drainage flows. Gamma spectrometry analysis of these samples revealed the presence of Cs-137 (21 samples,17 to 1239 pCi/kg,122 pCi/kg mean),
Co-60 (2 samples,44 to 247 pCi/kg,146 pCi/kg mean), and Cs-134 (1 sample,36 pCi/kg).
These results are within the range of the activity levels prevously detected in the vicinity of Rancho Seco and are within the anticipated decay trend.
Rancho Seco 7
1993 AREOR
IV-C. TERRESTRIAL MONITORING (continued)
DATA EVALUATION Soil (depression area)- Additional samples were taken in 1993 as part of the decommissioning. site characterization program. The site characterization surveys are being conducted to monitor areas in the vicinity of the discharge canal, within District property, to provide data on activity levels form historical permitted releases. Sample points were added,
as REMP locations to provide programmatic control and correlation for the data collected.
These additional sample points are considered "special" locations for the purpose of evaluating' indicator and control location data. Soil samples at 3 locations were collected in 1993 as part of this program. Gamma spectrometry analysis of these samples indicated the presence of Cs-137 (3 samples,17310 to 70890 pCi/kg,40547 pCi/kg mean), Co-60 (3 samples; 562 to 3639 pCi/kg,1775 pCi/kg mean), and Cs-134 (3 samples,410 to 1875 pCi/kg,1052 pCi/kg mean). The results for these samples are within the anticipated decay trend indicated by the site characterization samples.
The summary data for 1993 terrestrial monitoring is presented in Table 2. Comprehensive data tables are given in the following Appendix F tables:
=> F-3 (Garden Vegetables)
=> F-4 (Raw Milk)
=> F-5 (Soil and Sediment).
IV-D. AQUATIC LIFE MONITORING l
DATA EVALUATION f
Fish - 3 fish samples were collected during 1993 and analyzed for nuclides of interest by i
gamma spectrometry. Cs-137 (3 samples,29 to 53 pCi/kg,39 pCi/kg mean) was identified in the gamma spectromptry analysis.
The identification of Cesium nuclides in fish samples is attributed mainly to permitted historical i
liquid effluent discharges. Since Cesium nuclides were not identified in effluent discharge canal or creek water samples, it appears that the observed Cesium uptake in fish could ultimately be traced directly or indirectly to sediment sources.
The summary data for 1993 aquatic life consumption exposure pathway is presented in Table 2; A comprehensive data table is given in Appendix F. Table F-6.
Rancho Seco o
1993 AREOR.
'i
IV-E. WATER MONITORING DATA EVALUATION I
Sediment - 14 samples of sediment were collected from the discharge canal and the Clay /Hadselville/ Laguna Creeks during 1993. Gama spectrometry analysis of these samples indicated the presence of Cs-137 (14 samples,53 to l '89 pCi/kg,319 pCi/kg mean), Co-60 (4 samples,12 to 131 pCi/kg,59 pCi/kg mean), and Cs-134 (2 samples,13 to 22 pCi/kg,18 -
pCi/kg mean).
l The presence of nuclides of interest in sediments is attributed to historical permitted liquid effluent discharges with some contribution from fallout sources.
Algae - 8 samples of algae were collected from the discharge canal and the Clay / Hadselville/
Laguna creeks during 1993. Cs-137 (6 samples,63 to 121 pCl/kg,88 pCi/kg mean) was detected by gamma spectrometry analysis.
The identification of nuclides of interest in the algae samples is attributed to permitted historicalliquid effluent discharges. Additional contributions would be expected to have occurred from sediment activity and fallout sources.
Well Water - 19 well water samples were collected at indicator and co_ntrol locations around the site during 1993. Gamma spectrometry and tritium analysis of the samples indicated results less than LLD for all i_sotopes of interest.
Runoff Water - No nuclides of interest were identified by gamma spectrometry or tritium analysis of the 38 samples collected in 1993.
Surface Water - 5 locations (3 indicator and 2 control) were included in the surface water monitoring Program. Composite samplers located at the Plant intake.(Folsom South Canal) and effluent discharge provide monthly composite samples. During 1993,65 samples were '
collected and analyzed for nuclides of interest. No gamma-emitting nuclides or tritium were detected in any of the samples analyzed.
Drinking Water-Water supplied from the site wellis distributed in a potable water supply system for Station personnel consumption and use. On a monthly frequency, a sample of this water was collected and analyzed for nuclides of interest. The sample for December 1993-was unavailable due to the fact that the site well was out of service. ' No gamma emitting isotopes or tritium were found to be present in the 11 samples collected in 1993.
Rain Water-On a seasonal basis, rain water is collected at the site meteorological tower. The -
sample is analyzed for gamma emitting isotopes and tritium. During 1993, one sample was collected at this location. No isotopes of interest were detected in this sample.
Rancho Seco 9
1993 AREOR
IV-E. WATER MONITORING (continued)
DATA EVALUATION The summary data for the water monitoring program is shown in Table 2. Comprehensive data for all samples collected is given in the following Appendix F Tables:
=> F-5 (Soil and Sediment)
=> F-7 (Algae)
=> F-8 (Well Water)
=> F-9 (Runoff Water)
=> F-10 (Surface Water)
=> F-11 (Drinking Water)
=> F-12 (Rain Water)
Rancho Seco 10 1993 AREOR
TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM
SUMMARY
Name of Facility Rancho Seco Station Docket No. DPR-54 Location of Facility Herald, CA. Reporting Period January - December 1993 AllIndicator Locates Locatm with Highest Annual Mean Control Locatms (Posdrve Values only)
(Postrve Values Only)
(Postrve Values Ordy)
Range Range Range Medium or Lower Fractm Number Pathway Total Limt of Postive of Non-Sampled Type of Number Detection Mean From To Fraction Name Dtstance Direct Mean From To Fractm Mean From To Routme (Unstz)
Analysis of (LLD)
Positrve Miles ion Postrwe Reported Analysis Measure ments Air Parttulates Gross 156 0 002 0.026
.005
.079 156/156 0.1CO 0.1 NE
.027
.008
.058 52/52
.027
.007
.079 52/52 0
W -
Beta (pCVm Partaculate Comp.
quarterty Gamma (pCVmi Isotopic Mn-54 0 001
<LLD 0/ 4
<LLD
<LLD 0
Co40 0.001
<LLD 0/ 4
<LLD
<LLD 0
Zn45 0 003
<LLD 0/ 4
<LLD
<LLD 0
Cs-134 0.001
<LLD 0/ 4
<LLD
<LLD 0
Cs-137 0 001
<LLD 0/ 4
<LLD
<LLD 0
Direct Radiation 119 NA 17.3 13.1 25 3 119/119 8.2Ko 8.2 SW 21.7 19.3 27.5 4/ 4 18 1 13.9 27.5 16/16 0
quarterty TLD,2 (mrem /qtr) per locatiort Pan-8 asonic type
- 804, 3
CaSO.
element per
. badge Rrncho Seco 11 1993 AREOR
. =
TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM
SUMMARY
Name of Facility Rancho SeCo Station Docket No. DPR-54 Location of Facility Herald. CA. Reporting Period January - December 1993 AR indmator Locations location with Hghest Annual Mean Cortol Locauons (Posibve Values Only)
(Posiuve Values Only)
(Positwe Values Onfy)
Range Range Range Medsurn or Lower Fraction Number Pathway Total Limd of Posstue of Non-Sampled Type of Number Detection Mean From To Fracton Narne Distance Direct Mean Frorn To F4 action Mean From To Routine (Unas)
Analysts of (LLD)
Positue Mdes ion Posawe Reported Analysis Measure ments INGESTION Garden Gamma Vegetables Isotopic (pCs,tg)
Mn-54 15 29
<LLD 0/15
<LLD 0
at leest Co60 15 28
<LLD Oi 15
<LLD 0
semi-Zn-65 15 65
<LLD 0/15
<LLD 0
annua!!y, Cs-134 15 26
<LLD 0/15
<LLD 0
rnanthly Cs-137 15 29 18 18 18 1/15 06MO O6 SW 18 18 18 1115
<LLD 0
durbg growws season INGESTION Mdk Gamma (pCl,1)
Isotopic monthly MrwS4 16 6
<LLD 0/16
<tLD
<LLD 0
Co60 16 5
<LLD 0/16
<LLD
<LLD 0
Zn45 16 12
<LLD Of 16
<LLD
<LLD 0
Cs-134 16 5
<LLD Of 16
<LLD
<LLD 0
Cs-137 16 6
<LLD 0/16
<LLD
<LLD 0
RCnCho Seco 12 1993 AREOR
TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM
SUMMARY
Name of Facility Rancho Seco Station Docket No. DPR-54 Location of Facility __ Herald, CA. Reporting Period January - December 1993 AB Indicator Locations Locaton with Highest Annual Mean Control Locations (Posnive Values Only)
(Positrve Values Only)
(Posnive Values Only)
Range Range Range Medium or Lower Frachon Number Pathway Total Limit of Postrve of Non-Sampled Type of Number Detection Mean From To Fraction Name Distance Direct Mean From To Fraction Mean From To Routine (UntI)
Analysis of (LLD)
Positrve Miles ion Postrve Reported Anatysis Measure ments WATER-BORNE Sod; Gamma D:scharge isotopic Canal.
Semi-annual Mn-54 8
19
<t1D
<LLD
<LLD 0
(pCV kg)
Ct>60 8
24 363 19 850 6/ 8 1.5NO 1.5 N
770 690 850 2/ 2
<tLD 0
Zr4 5 8
46
<LLD
<tLD
< LLD 0
Cs 134 8
18 42 14 73 5/ 8 06MO 06 SW 73 73 73 1/ 2
<LLD 0
Cs-137 8
24 1111 100 3256 8/ 8 1.5NO 1.5 W
1777 297 3256 2/ 2
<LLD 0
WATER-BORNE
- Soil, Gamma Storm isotopic Drain semHmnual Mn-54 19
<LLD
<LLD
<LLD 0
(pCv kg)
Co-60 24 146 44 247 2/24 0.2JO 0.2 S
247 247 247 1/ 2
<LLD 0
l Zn45 46
<LLD
<LLD
<LLD 0
Cs-134 18 36 36 36 1/24 0.2JO 0.2 S
36 36 36 1/ 2
<LLD 0
Cs-137 24 122 12 1239 21/24 02JO O.2 S
1239 1239 1239 1/ 2
<tLD 0
i Rcncho Seco 13 1993 AREOt<
I
TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM
SUMMARY
Name of Facility Rancho Seco Station Docket No. DPR-54 Location of Facility Herald. CA. Reporting Period January - December 1993 AE Indicator Locatons Locaton with Highest Annual Mean Control Locahons (Posdwe Values Only)
(Postive Values Only)
(Posane Values Ordy)
Range Range Range Medan or Lower Fract m Nurnber Pathway Total Limat of Posdne of Non-Sampled Type of Number Detecti Mean From To Fracton Name Distanc Direct Mean From To Fracto Mean From To Routine (Un:ts)
Analysis of on Postive e
ion n
Reporte Analysis (LLD)
Mdes Positue d
Measur ements WATER-BORNE Soil; Gamma Derression Isotopic Area Serri-annual Mn-54 3
19
<LLD
<LLD
<LLD 0
(pCV kg)
CW 3
24 1775 562 3639 3/ 3 04MP1 0.4 SW 3639 3639 3639 1/1
<LLD 0
Zn-65 3
46
<LLD
<LLD
<LLD
! 0 l
Cs 134 3
18 1052 410 1875 3/ 3 0.4MP1 04 SW 1875 1875 1875 11 1
<LLD 0
Cs-137 3
24 40547 17310 70890 3/ 3 0.4MP1 0.4 SW 70890 70890 70890 1/1
<LLD 0
WATER-BORNE Soil Gamma (Mud & Sdt)
Isotopic senu-annual (pC4/ kg)
Mn-54 14 19
<LLD
<LLD
<LLD 0
Co60 14 24 57 12 131 4/14 0.6MO 0.6 SW 57 12 131 4/ 4
<tLD 0
Zn-65 14 46
<LLD
<LLD
<LLD 0
Cs-134 14 18 18 13 22 2/14 0.6MO O6 SW 18 13 22 2i 4
<LLO -
0 Cs-137 14 24 319 53 1189 14/14 06MO O6 SW 709 170 1189 4/ 4
<LLD 0
R:ncho Seco 14 1993 AREOR
TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM
SUMMARY
Name of Facility Rancho Seco Station Docket No. DPR-54 Location of Facility Herald, CA. Reporting Period January - December 1993 AllIndcator Locations Locaton with Highest Annual Mean Control Locations (Posdive Values Only)
(Postrve Values Only)
(Posdnre Values Only)
Range Range Range Mecum or Lower Fracton Number Pathway Total Limd of Posdtve of Non-Sampled Type of Number Detecton Mean From To Fracten Name Destance Direct Mean From To Fraction Mean From To Rouhne (Unds)
AnaWs of (LLD)
Postive Mdes ion Posdrve Reported Analysis Measure ments INGESTK)N Fe Gamma semi-annual isotopic (pCi/ kg)
(edbie Mn-54 3
17
<LLD 0/ 3
<LLD
<tLD 0
port:on)
Co-60 3
17
<LLD 0/ 3
<LLD
<LLD 0
Zrv65 3
39
<LLD 0/ 3
<LLD
<LLD 0
Cs-134 3
15
<LLD 0/ 3
<LLD
<tLD 0
Cs-137 3
19 39 29 53 3/ 3 06MO1 06 SW 53 53 53 11 1
<LLD 0
WATER-BORNE Algae Gamma semi-annual isotopic (PCVkg)
(wet)
Mn-54 8
17
<LLD 0/ 8
<LLD
<LLD 0
Co40 8
17
<LLD 0/ 8
<LLD
<LLD 0
Zn45 8
39
<LLD 0/ 8
<LLD
<LLD 0
Cs-134 8
15
<LLD 0/ 8
<tLD
<LLD 0
Cs-137 8
19 88 63 121 6/ 8 0.6MO O6 SW 103 84 121 2/ 2
<LLD 0
l Rrncho Seco 15 1993 AREOR i
TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM
SUMMARY
Name of Facility Rancho SeCo Station Docket No. DPR-54 Location of Facility Herald. CA. Reporting Period January - December 1993 A8 Endcator Locates Locatm vdh Highest Annual Mean Control Locabons (Postve Values Ordy)
(Postve Values Onty)
(Postbve Values Only)
Range Range Range Medaurn or Lower l
Fract m Number Pathway Total Luntt of Postve of Non- -
Sampled Type af Number Detecte Mean Frorn To Fract u Name Destance Dwect Mean Frorn To Fracbon Mean From To Routne (Unds)
Analy sis of (LLD)
Postve M4es son Poseve Repx4.
Analysis Measure ments WATER.
BORNE Wet Water Trtum 19 1000
<LLD 0/19
<LLD
<LLD 0
quarterly (pCV L)
Gamrna Isotope Mn-54 19 6
<LLD Of19
<LLD
<LLD 0
CW 19 5
<LLD Ot19
<LLD
<LLD 0
Zn-65 19 12
<LLD O/19
<LL D
<LLD 0
Cs-t 34 19 4
<LLD Of19
<tLD
<LLD 0
Cs-137 19 5
<LLD Of19
<LLD
<LLD 0
WATER-BORNE Runoff Trmum 38 1000
<LLD 0/38
<LLD
<LLD 0
Water B%
Gamma (pCV L)
Isotope Mn-54 38 6
<LLD O/38
<LLD
<LLD 0
Co40 38 5
<LLD 0/38
<LLD
<LLD 0
Zn4S-38 12
<tLD 0/38
<LLD
- LLD 0
Cs-134 38 4
<LLD OI 38
<tLD
<LLD 0
t Cs-137 38 5
<LLD Of38
<LLD
<LLD 0
l R:ncho Seco 16 1993 AREOR 1
TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM
SUMMARY
Name of Facility Rancho SeCo Station Docket No. DPR-54 Location of Facility Herald. CA. Reporting Period Januarv - December 1993 A5 Indacator Locations Location with Hghest Annual Mean Control Locations (Postive Values Only)
(Positive Values Only)
(Posaive Values Only)
Range Range Range l Total Medium or Lower Fraction Number PatNvay Lund of Postrve of Non.
Sampled Type of Number Detection Mean From To Fraction Name Distance Direct Mean From To Fracten Mean Frorn To Routine (Unds)
Analysis of (LLD)
Postive Miles ion Postrve Reported Analysis Measure ments WATER.
BORNE Surface Trasum 65 1000
<LLD 0/65
<LLD
<LLD 0
Water Monthly Gamma (pCV L)
Isotopic Mn-54 65 6
< LLD 0/65
<LLD
<LLD 0
CW 65 5
<LLD 0/65
<LLD
<LLD 0'
Zn-65 65 12
<LLD 0/65
<tLD
<LLD 0
Cs-134 65 4
<LLD 0/65
<LLD
<LLD 0
Cs-137 65 5
<LLD 0/65
<LLD
<LLD 0
WATER.
BORNE Drinking Traium 11 1000
<LLD 0/11
<LLD
<LLD 0
Water m6nthly Gamma (pCV L) isotopic Mn-54 11 6
<LLD 0/11
<LLD
<LLD 0
CW 11 5
<LLD 0/11
<LLD
<LLD 0
Zn-65 11 12
<LLD 0/11
<LLD
<LLD 0
Cs-134 11 4
<LLD Of 11
<LLD
<LLD 0
<LLD
<LLD 0
Cs-137 11 5
<LLD 0/11 l
' Rencho Seco 17' 1993 AREOR
TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM
SUMMARY
Name of Facility Rancho Seco Station Docket No. DPR-54 Location of Facility Herald. CA. Reporting Period January - December 1993 AR Indrator Locations Locate with Hghest Annual Mean Control Locatms 1
(Postive Vak.es Only)
(PosrJve Values only)
(Postve Values Only)
Range Range Range Medsum or Lower Fractm Number Pathway Total trnd of Postve of Non-Sampled Type of Number Detectm Mean From To fraction Name Drstance Drect Mean From To Fracta Mean From To Roubne (Und2)
Analysts of (LLD)
Positive Mdes ion Postive Reported Analysis Measure rnents WATER.
BORNE Rasn Tribum 1
1000
<LLD
<LLD
<LLD 0
Water Vanable Gamma (pCV L) isotope Mn-54 1
6
<LLD
<LLL,
<LLD 0
Co-60 1
5
<LLD
<LLD
<LLD 0
Zn-65 1
12
<LLD
<LLD
<LLD 0
Cs-134 1
4
<tLD
<tLD
<LLD 0
Cs-137 1
5
<LLD
<LLD
<LLD 0
Rancho Seco 18 1993 AREOR
V.
REFERENCES ANSl75 American National Standards Institute, Inc.,1975, " Performance, Testing and Procedural Specifications for Thermoluminescent Dosimetry," ANSI N545-1975.
CFRa Code of Federal Regulations,1993, " National Primary Drinking Water Regulations," Title 40, Part 141.
CFRb Code of Federal Regulations,1993, " Standards for Protection Against Radiation," Title 10, Part 20.
CFRc Code of Federal Regulations,1993," Domestic Licensing of Production and Utilization Facilities," Title 10, Part 50.
CFRd Code of Federal Regulations,1992, " Environmental Radiation Protection Standards for Nuclear Power Operations," Title 40, Part 190.
NCRP76 National Council on Radiation Protection and Measurements,1978, Environmental Radiation Measurements, NCRP Report No. 50.
NRC74 United States Nuclear Regulatory Commission,1974, " Permanently Defueled Technical Specifications for the Rancho Seco Nuclear Station,"
Appendix A to Facility License No. DPR-54 (as amended).
NRC75 United States Nuclear Regulatory Commission,1975, " Programs for Monitoring Radioactivity in the Environs of Nuclear Power Plants,"
Regulatory Guide 4.1, Revision 1.
NRC77 United States Nuclear Regulatory Commission,1977, " Calculation of Annual Doses to Man from Routine Releases of Reactor Effluents for the Purpose of Evaluating Compliance with 10CFR50, Appendix 1,"
Regulatory Guide 1.109, Revision 1.
NRC79a United States Nuclear Regulatory Commission,1979,"An Acceptable Radiological Environmental Monitonng Program," Branch Technical Position, Revision 1.
Rancho Seco 19 1993 AREOR
V. REFERENCES (continued)
NRC79b United States Nuclear Regulatory Commission,1979, " Quality Assurance for Radiological Monitoring Programs (Normal Operations) -
Effluent Streams and the Environment," Regulatory Guide 4.15, Revision 1.
NRC92 United States Nuclear Regulatory Commission, " Air Sampling in the Workplace", Regulatory Guide 8.25, June 1992 NUREG79 United States Nuclear Regulatory Commission,1979, " Radiological Effluent Technical Specifications for PWRs," NUREG-0472, Revision 2.
NUREG80a United States Nuclear Regulatory Commission,1980, " Methods for Demonstrating LWR Compliance with the EPA Uranium Fuel Cycle Standard (40CFR190)," NUREG-0543.
RS93A Rancho Seco Nuclear Station,1993," Semiannual Radioactive Effluent Release Report, January - June 1993," Sacramento Municipal Utility District report.
RS93B Rancho Seco Nuclear Station,1993, " Semiannual Radioactive Effluent Release Report, July - December 1993," Sacramento Municipal Utility District report.
Rancho Seco 20 1993 AREOR
.1
- l 4
i 4
l
- 1 I
J
]
VI. APPENDICES L
Rancho Seco 21 1993 AREOR
I i
s APPENDIX A -
1993 LAND USE CENSUS RESULTS l
I in compliance with the Rancho Seco Permanently Defueled Technical Specifications, section D6.8.3.b.2 and the REMP Manual, section 4.0, " Land Use Census", an annualland use census was conducted from December 1,1993 to February 15,' 1994. Based on the fact that the ODCM is using conservative inhalation and ingestion factors for the projected dose calculations, the scope of the 1993 land use census was modified to reflect this change. In i
addition to the change of scope the method of conducting the primary survey was changed to using aerial survey photographs. This method was chosen to effectively use the resources available. In evaluating this method it was found that reviewing aerial photographs provided an accurate method of determining locations and distances of the nearest residences. When the review of the survey photos indicated that a actual on-scene survey was needed to verify the use of identified structures, a visual observation was made. The aerial photos also provided a method to identify any changes in the agricultural, commercial, or industrial use of the land surrounding the site. Any changes that would be observed in the use of dairy, cattle grazing, vegetable garden production that is part of the ongoing evaluation for the land use census would be conveyed to the ODCM for evaluation. The use of conservative dose factors for the purpose of projected dose calculations still requires that we evaluate the use of the area surrounding the site. The information that is presented is to verify this assumption and validate the process.
The land use census covered an area bounded by each of the sixteen meteorological sectors out to a five mile radius from the Reactor Building.
All distances to interest areas were obtained by inspection of maps supplied by the SMUD Land Department.
The 1993 Land Use Census did not identify any changes in the use of the unrestricted areas that would require modifications in the Radiological Environmental Monitoring Program for evaluating doses to individuals from principal pathways of exposure. This evaluation and determination are in accordance with the requirements of 10CFR50, Appendix 1, section IV.B.3.
Rancho Seco A-1 1993 AREOR
A.
RESIDENT EXPOSURE PATHWAY
SUMMARY
Inhalation, Ground Plane and Water Consumption The 1993 census identified the eleven nearest residents living within the required five mile (8047 meter) radius of the Station as shown below:
Sector Distance Ranking (meters)
(Nearest to Farthest)
A
>8047 NA B
>8047 NA C
4830 8
D 1038 1
E
>8047 NA F
>8047 NA G
2315 5
H
>8047 NA J
5982 10 K
2267 4
L 1133 2
M 1943 3
N 3181 6
P 4086 7
Q 4924 9
R 6639 11 i
It is expected that all eleven residents use well water for consumption and other domestic '
purposes.
)
Rancho Seco A-2 1993 AREOR j
B.
DEPOSITION EXPOSURE PATHWAY
SUMMARY
Beef Consumption Based on conservative dose calculation parameters in use, the following is a summary for the 1993 land use census of the potential deposition exposure pathways at the locations listed below:
Sector Distance Consumption Pathway Comment (meters)
A 433 Beef Unrestricted Area Boundary B
430 Beef Unrestricted Area Boundary C
430 Beef Unrestricted Area Boundary D
448 Beef Unrestncted Area Boundary E
472 Beef Unrestricted Area Boundary F
667 Beef Unrestricted Area Boundary G
235 Beef Unrestricted Area Boundary H
198 Beef Unrestricted Area Boundary J
195 Beef Unrestricted Area Boundary K
198 Beef Unrestricted Area Boundary L
286 Beef Unrestricted Area Boundary M
405 Beef Unrestricted Area Boundary e
N 509 Beef Unrestricted Area Boundary P
442 Beef Unrestricted Area Boundary Q
500 Beef Unrestricted Area Boundary R
448 Beef Unrestncted Area Boundary Because of the extremely small amount of radioactive gaseous effluent released from the site, Deposition Exposure Pathway changes were considered inconsequential. The changes indicated in the milk, vegetation, and beef consumption table do not necessitate modification of ODCM or REMP practices.
Rancho Seco A-3 1993 AREOR
C.
IRRIGATED CROP EXPOSURE PATHWAY
SUMMARY
Laguna Creek Based on information stated in the Galt Irrigation District's 1993 Crop Report,2565.7 acre-feet of Laguna Creek water was diverted for irrigation purposes during the 1993 crop production season (up to October 31,1993). Laguna Creek was the sole source of irrigation water except for 283.52 acre feet of flood release water taken from Folsom South Canal during May And July. The Galt irrigation District did not receive Federal water from the Bureau of Reclamation during 1993. A totalland area of 1108 acres was subject to irrigation as follows:
Identification Acre Feet Acreage Crop Schwartz) Bramwell 218.1 80 Clover Hauschildt 2.2 39 Pasture DRJ Farms 106.7 45 Clover Mc Enemy 497.0 54 Rice Mc Enemy 70 Clover James Pellandini 106.3 100 Wheat R & M Farms 703.2 230 Clover Santos 88.6 90 Clover Silva 128.6 120 Pasture Van Warmerdam 259.5 60 Com Van Warmerdam 10 Clover Van Warmerdam 20 Alfalfa Wilson 455.6 190 Pasture TOTALS 2565.8 1108 Laguna Creek Rancho Seco no longer has the potential to release radiciodine (the decay of all lodine 131 of plant origin has exceeded 10 half lives and no production mechanism exists). Historical REMP results of beef sampling during both operational and pre-operational periods show that the beef pathway is not an actual exposure pathway. For these reasons beef sampling was discontinued. Milk sampling is being maintained to facilitate the State of California radiological environmental sampling program conducted under contract for the NRC and not because it has been. identified as an actual exposure pathway. Based on direct observation cattle consume water from the Clay, Hadselville, and Laguna Creeks.
Rancho Seco A-4 1993 AREOR
D.
OTHER EXPOSURE PATHWAYS The 1993 Land Use Census confirmed previous knowledge that the Clay / Laguna Creeks are utilized by some local residents and the general public for recreational and aquatic life consumption purposes. Past census evaluati >ns have been unsuccessfulin determining from the residents the usage / occupancy factors for their consumption and/ or recreational activities.
Therefore, insufficient data existed to justify ODCM usage factor modification.
E.
REMP EVALUATION An objective of the 1993 Land Use Census was to compare census and current REMP Manual locations to ensure consistency exists between monitoring activities and actual land utilization.
The following discussion is a summary of the comparison evaluation for each of the four exposure pathways.
Resident Exposure Pathway The inhalation and ground plane exposure pathways, the principal components of the Resident Exposure Pathway, are monitored directly and indirectly by thermoluminesence dosimetty (TLD), air and soil sampling and analysis. Well water was adequately monitored at five locations.
Therefore, since the existing REMP was more conservative with respect to Resident Exposure Pathway monitoring, no changes were required.
i l
o I
Rancho Seco A-5 1993 AREOR
E.
REMP EVALUATION (continued)
Deposition Exposure Pathway The Deposition Exposure Pathway (Section B)is monitored directly within the Station Site Boundary through foodstuff (garden vegetation) sampling and analysis. As discussed earlier, the potential for a deposition pathway has been evaluated by the ODCM and REMP programs and found to have little potential for the current plant status. Therefore, since the current REMP was representative and conservative with respect to Deposition Exposure Pathway monitoring, no changes were required.
Irrioated Crop Exposure Pathway The existing REMP was effective with respect to monitoring the identified irrigated crop exposure pathways. This conclusicr, wa= based on the fact that the REMP included irrigated vegetation sampling.
REMP surface water surveillance activities adequately monitor irrigation water radiological quality. Current ODCM calculations are conservative since dilution effects are not included when predicting potential dose delivered through downstream pathways.
Other Exposure Pathways Existing aquatic life, surface water and sediment sampling and analysis practices are effective in monitoring potential observable effects associated with recreational activities occurring at the Clay Creek, Hadselville Creek, Laguna Creek, Folsom South Canal and Rancho Seco l
Reservoir. With respect to availability and quantity of food sources, the other identified consumption activities were considered inconsequential for pathway monitonng purposes.
1 Considering the above, no REMP changes were required to monitor other exposure pathways.
i Rancho Seco A-6 1993 AREOR
F.
ODCM EVALUATION Based on 1993 Land Use Census findings, the following potential exposure pathways exist at the indicated locations:
GASEOUS EFFLUENT Exposure Pathway Location Comment Inhalation 1128 m ENE Resident location having the highest dispersion parameter Ground Plane 1128 m ENE Resident location having the highest deposition parameter Beef 195 m SSE Cattle grazing within the Site Boundary location having the highest deposition parameter LIQUID EFFLUENT Exposure Pathway Location Comment Freshwater Fish Clay Creek Recreation beyond the Site Boundary Swimming C!ay Creek Recreation beyond the Site Boundary Shoreline Deposits Clay Creek Recreation beyond the Site Boundary Irrigated Forage Laguna Creek Milk animals grazing beyond the Site Boundary Irrigated Forage Clay Creek Cattle grazing within or beyond the Site Boundary Drinking Water Clay Creek Cattle drinking water within or beyond the Site Boundary Rancho Seco A7 1993 AREOR
F.
ODCM EVALUATION (continued)
The GASEOUS EFFLUENT locations for inhalation, ground plane, and beef are inherently conservative since they are sited within the Station Site Boundary. The vegetation and goat milk locations which are outside the site boundary are conservative due to the fact that, as stated earlier, the potential for airborne particulate releases is minimal and the ODCM uses conservative default dispersion and deposition factors. USNRC guidance (NUREG-0133) references ODCM calculations to locations at or beyond the Site Boundary.
Specifying the Laguna Creek location also provides additional conservatism since the beneficial effects of downstream dilution are not considered when specifying effluent release restrictions.
As required by the 1993 Land Use Census the above information for exposure pathways and locations was submitted for incorporation in the ODCM for use during 1994.
Rancho Seco A-8 1993 AREOR j
i
APPENDIX B SAMPLE SITE DESCRIPTIONS AND MAPS This appendix provides descriptive information about the sampling locations and maps of all the locations for the Radiological Environmental Monitoring Program sites.
Table B-1 provides information on sample type, identification codes, and map location references. The sample identification code is an alphanumeric string beginning with the prefix "R" (for Rancho Seco Nuclear Station) followed by two letters to identify the sample media:
AS Air SL Soil RW Runoff Water FS Fish SW Surface Water LV Garden Vegetable DW Drinking Water AG Algae WW Well Water TL Direct Gamma Radiation (TLD)
MS Mud and Silt MF Milk RR Rainwater The numeric designations which follow the letter designations indicate the straight-line distance (in miles) from the center of the Reactor Building to the monitoring site.
The next letter designates the sector in which the monitoring location is located. The letters A through R are used for sector designators. The letters I and O are not used to prevent confusion with the numbers one and zero in the ID codes.
Sector _ Letter Degrees Azimuth Compass Point A
348.75 to 11.25 N
B 11.25 to 33.75 NNE C
33.75 to 56.25 NE D
56.25 to 78.75 ENE E
78.75 to 101.25 E
F 101.25 to 123.75 ESE G
123.75 to 146.25 CE
~
H 148.25 to 168.75 SSE J
168.75 to 191.25 S
K 191.25 to 213.75 SSW L
213.75 to 236.25 SW M
236.25 to 258.75 WSW N
258.75 to 281.25 W
P 281.25 to 303.75 WNW Q
303.75 to 326.25 NW R
326.25 to 348.75 NNW Rancho Seco B-1 1993 AREOR
SAMPLE SITE DESCRIPTIONS AND MAPS (continued)
The final letter designation indicates operational program ("O") or post-operational program
("P").
Table B-1 lists each site referencir 1 sample type and the location ID code to the map site number on one of the four Radio..
nvironmental Monitoring Site Maps included in this Appendix.
Figure B-1 Site Location Map: Shows t'ie locations cf the sample locations on and/or near the Site (including Storm Drain locat"ns).
Figure B-2 One Mile Radius map: Sampling locations within one mile of the reactor building are shown on this map.
Figure B-3 Five Mile Radius map: Sampling locations between one and five miles from the reactor building are shown on this map.
Figure B-4 25 Mile Radius map: Sampling h. _.tions between five to 25 miles from the reactor building are shown on this map.
1 i
f i
Rancho Seco B-2 1993 AREOR
1
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y... -.'. - - as' W3)
- 92) PE) (til sit LAcci ve i
\\,/
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@4)
Figure B-1 Radiological Environmental Sampling Locations on and near the Site (Storm Drain location numbers are in parenthesis)
Rancho Seco B-3 1993 AREOR
A l
\\
N I
HNW NNE
)
3 5
NE
- j w 104 eNE~
www i
3 12 19 58 j
00 0 0 L-s!'
u 1
s3 W
_o-
.e 29 l
- 2 M
a _
5 g
\\
~
WSW
)
ESE-
[
w wtw.
h s
i 36 13 s
g i
SW I
s i
Figure B-2 Radiological Environmental Sampling Locations within 1 mile from the Reactor Building l
i R:ncho Seco B-4 1993 AREOR
N 3
f NNW
{
NNE j
,I a
I ENE l
lp E.
I
\\
i i
/
u l
s#,,
l
- i W
s s
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7
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w-'
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/
ssW
)
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una mnm nouew Figure B 3 Radiological Environmental Sampling Locations from 1 to 5 miles from the Reactor Building f
7 s
t Rincho Seco B-5
- 1993 AREOR'
'I
N NNW NNE us ammes78
/
NW NE
. ammusw.
i A
47 WNW ENE 3e e i
o
/
W /
3,y
~
=<
=
E
~
f_ __
s a.-.===
.~.
-w = 4 2 l
5 37
-W E.
30 Y' l SW w
SE uw ag S
g y rarv 4
Figure B-4 Radiological Environmental Sampling Locations 5 to 25 miles from the Reactor Building
- Rancho Seco B-6 1993 AREOR
Table B-1 Radiological Environmental Monitoring Sites and Map Locations Sample Type ID Code Class Map Location Cotection Frequency Description. of Location Mues Sector No.
AIR RASO.1CO IND 1
Weekly On Srte PAP BLDG 01 C
AIR RASO 7EO IND 2
Weekty Meteorological Tower O7 E
AIR RASO3MO IND 3
Weekty Effluent Discharge 03 M
MILK RMFS.8PO IND 4
Weekty Medenos Dary 58 P
RUNOFF WATER RRWOSMO IND 5
Brasekty Sne Botniary 06 M
SURFACE WATER RSWO 7NO IND 6
MontNy Water Sump O7 N
SURFACE WATER RSW1.3FO IND 7
MontNy Rancho Seco Resanor 13 F
SURFACE WATER RSW3.7NO CON 8
MontNy Compostte ISCO Composne Sampler at Folsom South Canal 37 N
SURFACE WATER RSWO 3MO IND 3
MontNy Compostte ISCO Compostte Sampler at Effluent Discharge 03 M
SURFACE WATER RSW1.8NO IND 9
MontNy Confluence of Clay and Hadselvdle Creeks 18 N
DRINKING WATER RDWO1GO IND 10 MontNy Rancho Seco Site 0.1 G
WELL WATER RWWO 3EO IND 11 Ouarterty Sde WeX 0.3 E
WELL WATER RWWO 8DO CON 12 Quarterly Maresel Ranch 08 D
WELL WATER RWWO 8tO IND 13 Quarterty Clay Cattle Feedlot 08 L
WELL WATER RWW3 7MO -
IND 8
Quarterty Sdva Feed Lot Weg 37 N
WELL WATER RWW2.1MO IND 14 Guarterty Clay Area Wed (Tphng's) 22 M
RAIN WATER RRNO8DO IND 2
Seasonal Meteorological Tower O8 O
MUD AND SILT RMSO3MO IND 3
Ouarterty Effluent Descharge 03 M
MUD AND SILT RMSO6MO IND 5
Ouarterly Sete Boundary 06 M
MUD AND SILT RMSO 7NO IND 6
Seme-Annual Water Sump D7 N
MUD AND SILT RMS1.8NO IND 9
Seme-Annual Confluence of Clay and Hadselvdie Creeks 18 N
MUD AND SILT RMS3.7NO IND 8
Sems-Annual Laguna Creek at Folsom South Canal 37 N
FISH RFSO.3MO IND 3
Sams-Annual Effluent Descharge 03 M
FISH RFSO.6MO IND 5
Semi-Annual Sde Boundary 06 M
FISH RFSO.7NO IND 6
Semi-Annual Water Sump 07 N
FISH RFSt.5FO CON 15 Semi-Annual Rancho Seco Reservoir 1.5 F
ALGAE RAGG3MO IND 3
Semi-Annual Effluent Descharge 03 M
ALGAE RAGO6MO IND 5
Semi-Annual Sne Boundary 06 M
ALGAE RAGO7NO IND 6
Semi-Annual Water Sump 07 N
ALGAE RAG 1.8NO IND 9
Serre-Annual Confluence of Clay and Hadselwne Creek 18 N
ALGAE RAG 3.7NO IND 8
Semi-Annual Hadselvine Creek at Folsorn South Canal 37 N
Rancho Seco B-7 1993 AREOR
r-Table B-1 (Continued)
Radiological Environmental Monitoring Sites and Map Locations Sample Type ID Code Class Map location Co#ection Frequency Description, of Location Mues Sector No.
S Ott RSLO.2HO1 IND 16 Senw-Annual Storm Dram No 1 02 H
SOIL RSLO 2HO2 IND 17 Serrw-Annual Storm Dram No. 2 0.2 H
SOIL RSLO 2JO IND 18 Se w Arw m al Storm Draen No. 3 02 J
SOtt RSLO 2KO IND 19 SewAnnua!
Storm Dran No 4 02 K
SOtt RSLO3tO IND 20 Serm-Annual Storm Dran No 5 0.3 L
SOtt RSLO 2HO IND 21 Serm-Annual Storm Dram No. 6 0.2 H
SOlt RSLO 3MO7 IND 22 SewAnnual Storm Dran No. 7 03 M
SOlt RSLO 3MO8 IND 23 Serrw-Annual Storm Dran No. 8 03 M
SOtt RSLO 3MO9 IND 24 Sems-Annual Storm Dran No. 9 03 M
SOfL RSLO 6MO IND 5
Serrw-Annual Srte Boundary 06 M
SOtt RSLO.7NO IND 6
Serrw-Annual Sdva Property 07 M
SOIL RSL1.5NO IND 25 Serrw-Annual Sdvs Property 1.5 N
Soil RSL1.8NO IND 9
Serrw-Annual Sdva Property-HadselwDe Creek 18 N
SOtt RSLO 380 IND 26 Seme-Annual Storm Dram No.10 03 A
SOtt RSLO 3NO IND 27 Serrw-Annual Storm Dram No.12 03 N
SOIL RSLO 3R0 IND 28 Seryw-A.wmal Storm Dran No 11 03 O
SOIL RSLO 4MP1 SPECIAL 29 Seme-Annual Depressaan Area 04 M
SOIL RSLO 4MP2 SPECIAL 29 Serrw-Annual Depresson Area O4 M
SOlt RSLO4MP3 SPECIAL 29 Sern-Annual Depresson Area 04 M
GARDEN RLVO.6MO IND 5
Seme-Annuad MTGS*
Site Boundary Garden irngated vnth NM4ame Creek water 06 M
VEGETABLES GARDEN RLV18.KO CON 30 Sern-Annuait MTGS*
Lodi Area 18 0 K
VEGETABLES TLD RTLO 3RO IND 31 Quarterly NNW @ Penme+sr Fence N/O Spray Ponds; #1 03 R
TLD RTLO.3CO IND 32 Quarteriy NE Penmeter Fence / pariung lot NE comer; #2 03 C
TLD RTLO 3NO IND 17 Quarter y W Penmeter Fence road / poieltop of tub; #3 03 N
e TLD RTLO 3LO IND 20 Quarterty SW Penmeter Fence road near RS lake filters; #4 03 L
TLD RTLO.3HO IND 33 Quarterty Perrneter Fence / S/O of Admn Bldg: 85 03 H
TLD RTLO 4FO IND 34 Quarterly Photovoltaic FacWty/ North Fence (NRC); #6 04 F
TLD RTLO.5CO IND 35 Quarterty Rt 104 entrance to Rancho Seco; 87 05 C
TLD RTLO.8LO IND 36 Quarterty Tokay Substaton; #11 08 K
TLD RTL2.7LO IND 14 Quarterty in Clay at Tipleg's Resadence 11633 Clay Station Rd; #16 21 M
l TLD RTL82KO IND 37 Quartetty EBott Cemetery Near Angelo Dairy; #17 82 K
TLD RTL7.8CO IND 38 Quarterty Sam Jaber Resadencer 601 Carbondale Rd/ lone; #18 78 C
TLD RTLO.7GO IND 39 Quarter 1y We8 pump fence @ reservoir; 819 17 G
TLD RTL1.5MO IND 40 Quarterty Clay East & Kirkwood (NRC): #20 15 M
Rancho Sec0 B-8 1993 AREOR l
Table B-1 (Continued)
Radiological Environmental Monitoring Sites and Map Locations Sample Type '
ID Code Class Map Collecdon Frequency Description of Location Miles Sector Location No.
TLD RTL3 9KO IND 41 Quarterty SSW of Srte on Borden Rd; #26 39 K
TLD RTL7.4MO IND 42 Quarterfy Herald Fare Station #87112746 Me Rd, #30 7.4 M
TLD RTL3 7NO IND 43 Quartsdy Folsorn South Canal near Hobday Rd; #31 37 N
TLD RTL3 BMO IND 44 Quarterty BLM entrance to Folsern Gouth Canal Pumpeng Stabon; #33 38 M
TLD RTL19NO IND 9
Quarterly HadseMlle Cr. & Plant Emuent Cr.; #35 1.9 N
TLD RTL1.7FO IND 45 Quarterty Parks & Rec. Dept. Bldg at reservor; #43 1.7 G
TLD RTL1.4DO IND 46 Quarter 1y 0 9 Mdes E/O Site on Twin Cses Road / Rt 104; #46 1.4 D
TLD RTL8 OPO IND 47 Quarterty Ddiard School; #55 8.0 P
TLD RTLO 8D0 IND 12 Quarterfy Marciel Ranch; 14626 Twin Csbes Rd; #63 08 O
TLD RTLO 6MO IND 5
Quarterty Srte Boundary Irngated Garden; #65 06 M
TLD RTLO 4NO IND 29 Quarter 1y Depress.on @ Clay Creek; #66 0.4 N
TLD RTLO.4NO1 IND 29 Quarter 1y Spod Pee @ Clay Creek; #67 04 N
TLD RTLD 3PO IND 48 Quarterfy West Fence; #68 03 P
TLD RTLO.1MP Special 49 Quarterty Mantenance Budding: #84 0.1 M
TLD RTLO.1LP Special 50 Quarteriy Fabncation Stoo; # 85 01 L
TLD RTLO 2LP Special 51 Quarterty Matenal Storage Area; #86 02 L
TLD RTLO 2MP Special 52 Quarteriy Swrtchyard; #87 0.2 M
TLD RTLO 3NP Special 53 Quarter 1y West Garden, #S8 03 N
TLD RTLO4NP Special 54 Quarterty Southwest ISFSt. 689 04 N
TLD RTLO SPP Special 55 Quarterty Norttwest ISFSI, #90 0.5 P
TLD RTLO 3OP Specsal 56 Quarterly Northeast ISFSI. #91 03 O
MTGS. - Monthly Throughout the Growng Season Rancho Sec0 B-9 1993 AREOR
=
i P
APPENDIX C QUALITY CONTROL SAMPLE ANALYSIS RESULTS QUALITY ASSURANCE AND CONTROL Implementation of the Radiological Environmental Monitoring Program (REMP) consists of a number of discrete steps including:
=> Sample collection,
=> Packaging,
=> Shipment and receipt,
=> Measurements of radioactivity,
=> Data evaluation, and
=> Reporting.
These program elements are performed according to approved, written procedures to assure the validity of REMP results. This section discusses the intemal quality control measurements made by the analysis laboratory, Controls for Environmental Pollution, Inc. (CEP), and the results of their partici;;ation in the Interiaboratory Comparison Program conducted by the United States Environmental Protection Agency (EPA). The Interlaboratory Comparison Program and the CEP Quality Assurance Program provide information on the validity (accuracy and precision) of the REMP implementation steps listed above.
Because REMP measurement validity is important for evaluating protection of the health and safety of the public, RSNS has established an Environmental Quality Assurance Program (EQAP)
-i for radiological environmental measurements. The Environmental QA Program implements the guidance provided in Regulatory Guide 4.15, (NRC79a).
l Rancho Seco C-1 1993 AREOR s
INTERLABORATORY COMPARISON PROGRAM CEP participates in the Interlaboratory Comparison Program (ICP). The ICP is a radiological analysis quality control program sponsored by EPA's Environmental Monitoring Systems Laboratory in Las Vegas. Participation in the ICP is a requirement of the Permanently Defueled Technical Specification (section D6.8.3.b.3). It provides for an independent check of the proficiency of the laboratory. It also provides information on the precision and accuracy of measurements of radioactive materialin REMP samples by CEP and other laboratories. The extent of CEP participation in this program includes all of the environmental radioactivity determinations that are offered by the EPA and related to the analyses required by the REMP manual.
The EPA Intercomparison Program consists of a variety of sample media spiked with known quantities of specific radioactive materials at levels normally found in environmental samples.
These levels are generally quite low. Most samples require long counting times to determine if any activity is present, and the results may have large deviations from the mean. When the samples are distnbuted by the EPA, there is an implied precision requirement given in terms of the analysis requested to be performed. After all the labs provide the results of their analyses (three are required from each lab), the EPA publishes a statistical summary of all the results by all laboratories. This report includes the EPA acceptance controllimits, the mean of alllaboratories and the standard deviation of the results by alllabs, among other statistics.
If the results of a determination by CEP in the ICP are outside the specified controllimits or do not pass the outliers test, CEP must investigate and, if a problem is identified, take corrective action to prevent problem recurrence.
During 1993, CEP analyzed 21 ICP samples for isotopes that are directly related to the analysis required by the REMP. All of the results were within the controllimits, passed the outliers test, and are considered acceptable by the EPA.
The CEP measurement results are presented in Table C-1 along with the acceptable EPA values for each test.
Rancho Seco C-2 1993 AREOR
INTRALABORATORY QUALITY ASSURANCE PROGRAM CEP also operates an intrataboratory Comparison Program (Quality Assurance Program) to maintain an acceptable quality level on a routine basis.
As part of their Quality Assurance Program, CEP performs a background count, an analysis of a spiked sample, and a duplicate sample count for every ten Rancho Seco REMP samples analyzed.
These quality control procedures are performed for all analyses except gamma spectrometry, for which weekly energy and efficiency checks are performed. The spiked and duplicate samples are prepared by CEP personnel not directly involved with the analysis. Spiked samples, as well as the radioactive sources used for the gamma spectrometer checks, are traceable to the National institute for Standards and Technology (NIST).
In all cases during 1993, the duplicate analyses and the tritium spikes were acceptable.
RANCHO SECO AUDIT AND SURVElLLANCE RESULTS The Rancho Seco Quality Program requires periodic audits of REMP activities, including CEP.
CEP's performance is evaluated annually by the Rancho Seco QA Department. The 1993 evaluation determined that CEP performed adequately. The Rancho Seco Quality program requires an audit every three years. The next REMP contract laboratory audit is due in 1995.
CONCLUSIONS Based on the results of interfaboratory and intralaboratory quality control measurements and reviews made during 1993, it can be concluded that CEP provided valid measurements of radioactive materialin Rancho Seco REMP samples. The results of this review also indicated CEP's intemal quality control program was effective in maintaining their systems and procedures at an acceptable level of quality.
The REMP technical staff continue to monitor the contractor laboratory and identify improvements in their Quality Assurance program.
DIRECT RADIATION (TLD) COMPARISON PROGRAM The TLD vendor, ICN Dosimetry Services, participates in a monthly blind spike comparison testing program sponsored by the University of Michigan. A review of ICN's results of the participation in this testing program indicates that ICN has satisfactorily completed all of the required tests for the types of environmental radiation monitored at RSNS.
This comparison program satisfies the requirement of the REMP manual section 6.0.
Rancho Seco C-3 1993 AREOR
TABLE C-1 INTERLABRATORY COMPARISON PROGRAM 1993 Statistical Report Summary Data for Responding Lab "PV" (Controls for Environmental Pollution Inc.)
STUDY DATE NUCLIDE KNOWN CEP NON-OUTLIER UPPER LOWER VALUE MEAN MEAN CONTROL CONTROL Gross Alpha / Beta in Water 1/29/1993 Gross Beta 44 35.33 41.99 52.7 35.3 Intercomp B 4/20/1993 Co-60 39 41.33 39.36 47.7 30.3 Intercomp B 4/20/1993 Cs-134 27 25 25.4 35.7 18.3 Intercomp B 4/20/1993 Cs-137 32 29 32.6 40.7 23.3 Tritium in Water 6/04/1993 Tritium 9844 9458.67 9591.82 11551.2 8136.8 Gamma in Water 6/11/1993 Ba-133 99 93 96.74 116.3 81.7 Gamma in Water 6/11/1993 Co-60 15 15.67 14.9 23.7 6.3 Gamma in Water 6/11/1993 Cs-134 5
6 5.39 13.7 0
Gamma in Water 6/11/1993 Cs-137 5
6 5.76 13.7 0
Gamma in Water 6/11/1993 Zn-65 103 107.33 107.54 120.3 85.7 Radionuclides in Milk 9/24/1993 Cs-137 49 54 50.02 57.7 40.3 Radionuclides in Milk 9/24/1993 Total K 1679 1690 1674.07 1824.7 1533.3 Performance B 10/19/1993 Co-60 10 11 10.41 18.7 1.3 Performance B 10/19/1993 Cs-134 12 11 9.78 20.7 3.3 Performance B 10/19/1993 Cs-137 10 9.33 10.93 18.7 1.3 Performance B 10/19/1993 Gross Beta 58 48 53.4 75.3 40.7 l
Tritium in Water 11/05/1993 H-3 7398 7046.67 7215.65 8681.9 6114.1 Gamma in Water 11/12/1993 Co-60 30 30 29.72 38.7 21.3 j
Gamma in Water 11/12/1993 Cs-134 59 52 54.42 67.7 50.3 l
Gamma in Water 11/12/1993 Cs-137 40 41.33 42.14 48.7 31.3 Gamma in Water -
11/12/1993 Zn-65 150 156.67 156.07 176 124 l
Rancho Seco C-4 1993 AREOR
APPENDIX D SAMPLE COLLECTION AND ANALYSIS METHODS For each of the sample media collected, the method of collection is documented in Rancho Seco Nuclear Station procedures. Detailed analysis methods are documented in procedures controlled by the contract laboratory, Controls for Environmental Pollution (CEP). A brief description of these collection and analysis methods is included in this Appendix.
Sample Media Collection / Analysis Method AIR A mechanical air sampler continuously moves air through a filter designed to capture particulates by filter paper impaction. The samplers are equipped with a flow totalizer which measures the volume of air that has passed through the filter paper. An elapsed time meter is installed to identify pump motor malfunctions which cause discontinuous sampling events.
The filter paper is exchanged weekly. At least one day is allowed to elapse between sample collection and counting to reduce the interference of naturally occurring radon and thoron daughters on the sample analysis. The filter paper is assayed for gross beta radioactivity by placing the filter on a stainless steel planchet and counted with an intemal gas flow proportional counter.
The individual particulate filter papers are saved over a calendar quarter and the composite collection is assayed for gamma isotopic radioactivity by gamma spectroscopy.
DIRECT RADIATION Thermoluminescent dosimeters (TLDs) are deployed in near and far-field areas. Two TLD's, each containing three CaSOcDy phosphors, are placed at each monitoring location to assure adequate data recovery and to improve measurement statistics. The TLD field exposure cycle is approximately three months. At the end of the field exposure cycle, the TLD's are exchanged with recently annealed ones and retumed to a contract laboratory for processing. The exposure reported by the laboratory is the average of six values, corrected for non-field exposure cycle contributions.
SOIL &
SEDIMENT Samples of sediment and soil are collected from the top three inches of the sampled material. Sediment samples are obtained approximately two feet from the shoreline. Each sample is assayed directly for gamma isotopic radioactivity by gamma spectroscopy.
1 Rancho Seco D-1 1993 AREOR
Samole Media Collection / Analysis Method GARDEN PRODUCE Samples of vegetables are collected from a garden which is maintained at the Station, The vegetables are assayed directly for gamma isotopic radioactivity by gamma spectroscopy.
RAW MILK One gallon grab samples of unpasteurized milk are collected monthly from a day tank at a local dairy. The sample is assayed directly for gamma isotopic radioactivity by gamma spectroscopy FISH Fish are collected semi-annually from the Clay Creek system. The dissected (edible) portion of each sample is assayed directly for gamma isotopic radioactivity by gamma spectroscopy.
ALGAE Samples of algae in the Clay Creek system are collected semi-annually and assayed directly for gamma isotopic radioactivity by gamma spectroscopy.
WATER One gallon grab samples of water from locations in the liquid effluent pathway and groundwater are collected as follows:
Surface water and drinking water are collected monthly Runoff wateris collected biweekly Well water is collected quartedy.
At two locations, samples are periodically obtained to provide a monthly composite sample. All samples are assayed for tritium by liquid scintillation counting and for gamma isotopic radioactivity by gamma spectroscopy.
RAIN WATER One gallon grab samples of rainwater, collected at the Meteorological Tower location, are collected on a seasonal basis.-. All samples are assayed for tritium by liquid scintillation and for gamma isotopic e
radioactivity by gamma spectroscopy.
Rancho Seco D2 1993 AREOR
l APPENDIX E ENVIRONMENTAL MONITORING PROGRAM DESIGN I
PROGRAM BASIS The Sacramento Municipal Utility District conducts a continuous Radiological Environmental j
Monitoring Program (REMP) at the Rancho Seco Nuclear Station to assess the impact of Station operation on the surrounding environment. The current REMP is a continuation of a similar program initiated prior to and during operation of the Station. Samples of the surrounding environment are collected on a routine basis and analyzed to determine the amount of radiation and radioactive materials present in the exposure pathways. The Califomia Department of Health Services conducts a parallel environmental monitoring' program under contract from the USNRC.
During 1993 the program was directed and executed by the Radiation Protection / Chemistry j
Superintendent. Sample collection is performed by the Technical Staff and the Chem / Rad Decommissioning Technicians. Data review and Program maintenance are performed by the Radiological Health Supervisor. The Program is operated with primary accountability and cognizance of the Nuclear Plant Closure Manager.
The Program is designed consistent with Title 10, Code of Federal Reoulations. Part 50, Appendix I-Section IV, B.2, 8.3 and C, and Appendix A, " General Design Criteria for Nuclear Power Plants," Criterion 64, The program also complies with Title 10, Code of Federal Reoulations. Part 20," Standards for Protection Against Radiation," Section 1302. These federal requirements are cited in the Rancho Seco Permanently Defueled Technical-l Specifications and the REMP manual. REMP requirements are implemented through the review, approval and routine use of several documents, namely the REMP Manual, Offsite Dose Calculation Manual, Surveillance Procedures and Health Physics implementing Procedures.
s
- i Rancho Seco E-1 1993 AREOR t
PROGRAM BASIS (Continued)
The programmatic elements of the REMP are based on regulatory requirements and associated guidelines. The objectives of the Program are to:
1.
Provide the technological basis and the instruction for monitoring the environs for radioactivity sources. The radioactive sources which contribute to detectable radioactivity in the local environs are comprised of;
=> naturally occurring background,
=> releases during normal operations,
=> world-wide weapons testing, and
=> major global nuclear accidents 2.
Provide the means to verify the effectiveness of the Rancho Seco Nuclear Station Radiological Effluent Control Program.
3, Meet the minimum detectable limits for radioisotopes in environmental samples.
4.
Provide quantitative measurements in the gaseous, liquid and direct radiation exposure pathways for radionuclides.
5.
Provide indications of the largest potential radiation exposure for individuals as a result of radionuclides in the principle exposure pathways.
The Program is developed and conducted using recognized standards and practices [ANSl75, NRC75, NRC79a, NRC79b, NUREG79, NUREG80a, NCRP76).
Rancho Seco E-2 1993 AREOR r
y a
m.
m.
r REMP CHANGES The REMP manual (revision 6) and Permanently Defueled Technical Specifications administrative requirements for the REMP program were not revised during 1993. Additional sample locations for soil sampling were added to implement the commitment to monitor locations identified during the site characterization evaluation. The new locations are in the depression area next to "no name" creek within District property. These locations are considered as special locations and are not included in evaluations involving indicator and controllocations.
EXPOSURE PATHWAYS The fundamental parameters which have been defined prior to monitoring the environs are:
1.
Identification of the effluent release pathways 2.
Identification of the human exposure pathways 3.
Identification of the land use parameters by the population within a five mile radius of the plant site.
Each of these three parameters is discussed below.
Effluent Release Pathways There are three principal pathways which may result in human exposure to radiation and radioactive material originating from Station operation:
- 1. Gaseous effluents
- 2. Liquid effluents and
- 3. Direct radiation from these effluents and onsite sources.
Rancho Seco E-3 1993 AREOR I
EXPOSURE PATHWAYS Effluent Release Pathways (continued)
Gaseous Effluents Gaseous ventilation and process effluents are released, through particulate filtration units (requirement for charcoal filtration was deleted in 1993) to the environment from the Reactor Building, Auxiliary Building and Auxiliary Building Grade Level Vent stacks.
In the gaseous pathway, airbome radioactive materials can be inhaled or ingested by humans.
Animals can inhale or ingest radioactive material present in the atmosphere which are retained in animal food products (meat or milk). Radioactive materials which are carried by air currents can also be deposited on vegetation or water sources which are in tum directly consumed by humans or animals.
Liouid Effluents In the liquid exposure pathway, radioactive materials in surface waters can be ingested by humans directly or indirectly through the consumption of aquatic foods such as fish and shellfish. Humans can consume vegetation which is irrigated with Clay Creek water which may contain radioactive material Another exposure pathway from liquid effluents results from the consumption of animal products such as meat and milk from animals which have fed upon irrigated vegetation or otherwise drank Clay Creek water.
Direct Radiation In the direct radiation pathway, potential radiation exposure may occur from radioactive material storage vessels which are contained within the site boundary such as the Borated Water Storage Tank People can potentially be exposed to direct radiation from gaseous.
effluents or from ground deposition of particulates deposited on the ground from gaseous or liquid effluents.
t i
1 Rancho Seco E-4 1993 AREOR
~..
LAND USE CENSUS On an annual basis, a land use census is conducted within a five mile radius to identify any changes in the human exposure pathways. The Land Use Census is used to determine the changes needed for REMP monitoring activities. The results of the land use census conducted during 1993 is presented in Appendix A of this Report. From data obtained from the Land Use Census, exposure pathways are analyzed through a systematic process which identifies a sample medium or organism that is found to potentially contribute to an individual's radiation exposure. Usage and bioaccumulation factors (NRC77) are then specified which represent the magnitude of radioactive material transfer through the food chain to a receptor.
The analysis of the effluent and exposure pathways enables monitoring sites to be identified as " indicator"(for sites at which the potential effects of Station effluents would be readily detected) or " control" (for those sites which are not expected to be influenced by Station operation). The analysis results of samples obtained at indicator and control sites are routinely compared to identify potential exposures above background levels.
MONITORING LOCATION SELECTION The REMP maintains the minimum monitoring sites required by the REMP manual, Table 6.
This minimum program is suppler anted with additional samples to compensate for changes in the radiological environment sur ounding Rancho Seco. Some of the monitoring sites were also selected by the United St.tes Nuclear Regulatory Commission and the California Department of Health Servic ss as part of their monitoring programs. Indicator sites are placed in areas which would be most sensitive to the effects of Station effluents such as downwind or downstream areas near the Station. if radioactive materialis detected above background at any of these indicator sites, observed potential exposure and dose to humans can be estimated to verify the effectiveness of the Offsite Dose Calculation Manualin predicting potential exposures or doses, it is important to note that the detection of radioactive material in indicator samples does not necessarily mean that it's presence can be attributed to Rancho Seco operations. Moreover, especially with most liquid effluent pathway samples, the detection of radioactive material is difficult to interpret since it is unknown when the material was deposited. In many instances, the observed radioactive material could correctly be ascribed to historical (pre-1993) depositions.
1 Ranctio Seco E-5 1993 AREOR-
i MONITORING LOCATION SELECTION (continued)
Controllocations provide data that should not be influenced by the operation of Rancho Seco.
These locations are selected based upon distance from the Station in the upwind or upstream direction of the effluent release pathways. Samples obtained from controllocations should, upon analysis, revealinformation about the presence and distribution of naturally occurring and man-made radioactive materials. Data from these locations are used to aid in the discrimination between the effects of Rancho Seco releases and other natural phenomena or accidental releases (such as the 1986 Chernobyl accident) which may result in human exposure.
Gaseous effluent indicator monitoring sites are generally placed in areas which receive prevailing winds crossing the Rancho Seco site. Liquid radioactive effluents are discharged in batches from two onsite Retention Basins into "No Name" Creek located southwest of the Station. Dilution water, obtained from the Folsom South Canal, is discharged into "No Name" Creek to give reasonable assurance of compliance with the 10CFR50, Appendix I dose guidelines. "No Name" Creek flows southerly into the Clay Creek. Without this dilution water flow, the Clay Creek would be in a dry state for most of the year.
Beyond the Site Boundary at a point north of Highway 104, the Clay Creek empties into the Hadselville Creek. Hadselville Creek then empties into the Laguna Creek at a point west of North Clay Station Road near the Folsom South Canal. Shortly beyond this intersection, water supplied from the Folsom South Canal flows into the Laguna Creek. Finally, Laguna Creek flows into the Cosumnes River at a point located approximately 20 straight-line miles west of Rancho Seco. Since this stream system is the only routine release pathway for liquid radioactive and non-radioactive effluents from the Station, the liquid exposure pathway indicator sites are located along these creeks and nearby land.
The direct radiation pathway is monitored principally through a network of passive devices (thermoluminescent dosimeters - TLD's) at monitoring sites distributed in sectors centered on the Station. The TLD's are located primarily at the site, residential, and recreational areas around the Rancho Seco location. This design provides the capability to easily detect Station-i induced direct radiation contributions to the observed terrestrial and cosmic direct radiation background.
I 1
Rancho Seco E-6 1993 AREOR
MONITORING LOCATION SELECTION (continued)
Some TLD's have been sited in special locations to record direct radiation resulting from known depositions of radioactive material and to provide pre-operational data for the proposed interim Spent Fuel Storage Installation (ISFSI).
Appendix B contains a detailed description and illustration of the REMP sample and monitoring sites.
SAMPLE MEDIA Samples are collected from predetermined monitoring sites at a specified frequency. The sample media chosen is a function of the type of monitoring desired and coincide with one of the following exposure pathways:
o Atmospheric o
Direct radiation o
Terrestrial o
Aquatic life o
Water Atmospheric monitoring is accomplished by filtering a volume of air using a mechanical air pump to collect particulates with a particulate filter paper. Three air sampler locations are used to collect weekly air samples. One location (Meteorological Tower)is a control location and the remaining two locations are indicdtor locations on the plant site.
Direct radiation monitoring is achieved by placing TLD's at above-ground sites. TLD's respond to, and record the amount of, gamma radiation exposure. The source of this gamma radiation exposure is varied and includes potential Station effluents and naturally-occurring -
terrestrial and cosmogonic radionuclides. The TLD's are also influenced by seasonal and global (fallout) radiation sources. Almost all the exposure recorded by a TLD could be traced to terrestrial radionuclides.
There are 30 sites which are monitored by thermoluminesence dosimetry within a 10-mile radius of the Station. The TLD's are placed at the Station Industrial Area Boundary, near the property boundary, locations of interest such as nearby residences, and also at control locations located beyond five miles of the Station.
Rancho Seco E-7 1993 AREOR
h l
SAMPLE MEDIA (continued)
Terrestrial monitoring is accomplished by obtaining samples of sediment, soil, garden vegetation, and milk to measure the quantity of radioactive material deposited from gaseous and liquid effluents. There are 5 mud and silt,19 soil,2 garden vegetation, and 1 milk sites.
Aquatic monitoring includes the sampling of fish and algae. Algae is an excellent concentrator of radioactivity contained in water and is sampled to provide an early indication of increased liquid radioactive material concentration. There are 4 fish and 5 algae sample sites.
Water monitoring includes samples of surface, runoff, drinking, and well sources from locations in the liquid effluent pathway and from area wells. The 6 surface water sampling locations monitor site supply water (Folsom South Canal), runoff water and water discharged from the Station. Drinking water is sampled from 5 groundwater wells.
SAMPLE ANALYSIS & DATA HANDLING The laboratory which provides radio-analytical services for the Program is Controls for Environmental Pollution (CEP) located in Santa Fe, New Mexico. Sample analysis results submitted by CEP are reviewed for accuracy and completeness and then entered into a computerized data base for evaluation and trending.
Data comparisons are made between individual control and indicator sample sites to isolate potential Station influences on the measurement results.
The summarized results of the 1993 Radiological Environmental Monitoring Program are presented in Table 3.
Individual (raw data) results are presented in Appendix F Tables F 1 through F-12.
Rancho Seco E-B 1993 AREOR
REGULATORY REPORTING LEVELS CEP sample analysis data is promptly reviewed and evaluated by the Radiological Health Supervisor as the results are received. Ah sample analysis results are reviewed for correct sensitivity and anomalies.
The activity concentration values listed in Table E-1 are the environmental Fuel Cycle Dose quantities that, if exceeded, require a Special Report to be submitted to the USNRC. In -
accordance with the REMP Manual (Section 5, Fuel Cycle Dose), the Special Report must include an evaluation of any release conditions, environmental factors or other aspects which caused the reporting limits to be exceeded.
In addition to the Fuel Cycle Dose reporting requirements, a Special Report is required to be submitted to the USNRC when more than one of the radionuclides in Table E-1 are detected in the sampling medium and the summed ratio of detected activity concentration to the respective Reporting Level concentration is greater than, or equal to, unity (1). When radionuclides other than those listed in Table E-1 are detected which are a result of Station effluents, a Special Report is required to be submitted if the potential annual dose commitment exceeds the 10 CFR 50, Appendix i guidelines.
No reports of the types described above were required to be submitted during 1993.
SENSITIVITY OF THE REMP MEASUREMENT PROCESS All Program measurements must be performed at a sensitivity which meets USNRC requirements. This sensitivity is determined "before the fact" (a pn'on) for each radionuclide of interest and sample analysis type. Typical controllable sensitivity parameters include:
i
=> Sample volume or mass
=> Sampling efficiency
=> Time from sample collection to measurement
=> Instrument detection efficiency for the nuclides (energies) of interest
=> Background radiation levels
. => Chemical recovery factors Rancho Seco E-9 1993 AREOR i
?
SENSITIVITY OF THE REMP MEASURtiMENT PROCESS (continued)
By adjusting and controlling each of these parameters to maximize measurement process efficiency, a maximum sensitivity level (activity concentration) can be specified for each nuclide of interest and analysis type while maintaining an economic measurement process. The maximum sensitivities in the REMP are specified by the USNRC in the REMP Manual approved for Rancho Seco. These sensitivities are referred to as "LLD's", an acronym for
" Lower Limit of Detection". LLD's are specified on an "a pdod' basis and apply to routine measurement process capabilities when no other interfering radioactivity is present. The word
" routine"is emphasized since occasional circumstances, such as limited sample mass, elevated levels of background radiation and interfering nuclides can contribute to sensitivity degradation.
Such occurrences are normally noted and reported during the conduct of REMP activities.
Meeting the LLD requirements is a quality control function shared by both REMP and the analytical laboratory personnel. Once the laboratory establishes values for the controllable parameters for each analysis type, sample chain of custody controls ensure that these '
parameters are upheld, if all parameters are upheld, then compliance with the LLD requirements has been demonstrated. The specific LLD values for Program measurements are included in Table E-2.
Since most of the samples analyzed result in the detection decision " activity not identified", a Minimum Detectable Activity (MDA) concentration valus is calculated and reported. This value can be thought of as the LLD-at-the-time of-counting since it is calculated using an equation which is similar to the one used to establish LLD parameters. The biggest difference is that actual (not "a pdod') parameters are used, including interference from natural radioactive material in the sample, it is important to note that MDA's are reported only for those measurements where the " activity not identified" decision has already been made.
MDA values are used primarily to identify changes in the measurement process and to convey more information about the measurement itself. Without the use of the MDA concept, most Program measurements would be reported simply as "<LLD". With MDA used, Program measurements are reported as "< xxx " where "xxx"is the calculated MDA concentration.
Rancho Seco E 10 1993 AREOR
TABLE E-1 REPORTING LEVELS FOR RADIOACTIVIT( CONCENTRATIONS IN ENVIRONMENTAL SAMPLES Analysis Water Airborne Fish Milk Food (pCl/L)
Particulate or (pCilkg, wet)
(pCl/L)
Products Gases (pCi/m*)
(pCilkg, wet)
H-3 2 x 10'(a)
Mn-54 1 x 10' 3 x 10' 2
Co-60 3 x 10 1 x 10' 2
Zn-65 3 x 10 2 x 10' 2
Cs-134 30 10 1 x 10 60 1 x 10 Cs-137 50 20 2 x 10' 70 2 x 10' Gross Beta 40 2
Notes:
(a) For drinking water samples, this is a 40 CFR Part 141 value (b) Total for parent and daughter Rancho Seco E-11 1993 AREOR
TABLE E 2 MAXIMUM (REQUIRED) LLD VALUES FOR ENVIRONMENTAL SAMPLES (NRC79A)
Airborne Fish Milk Food Sediment Analysis Water Particulate or (pCilkg, wet)
(pCi/L)
Products (pCilkg, dry)
Gases (pCilkg, dry)
(d)
(pCi/L)
(pCi/m*)
2 Gross Beta 4
1 x 10 (b)
H3 2000 (1000, b)
Mn-54 15 130 Co-60 15 130 Zn-65 30 260 Cs-134 15 5 x 10 2 130 15 60 150 (10, b)
Cs-137 18 6 x 10 2 150 18 80 180 (10, b)
Notes:
(a)
Analysis requirement deleted in revision 6 of the REMP manual.
(b)
LLD for water samples utilized for human consumption only.
2 (c)
Composite analysis LLD is Shown; individual sample LLD is 0.05 pCi/m (d)
Other peaks which are measurable and identifiable, together with the nuclides in Table E-2, -l should be identified and reported (NRC79a)
Rancho Seco E 12 1993 AREOR
APPENDIX F 1993 SAMPLE ANALYTICAL RESULTS 1
5 Rancho Seco F1 1993 AREOR i
,yj TABLE F-1 1993 WEEKLY AIR SAMPLE. iAARY Gross Beta Activityin Air Particulates (pCi/m*)
Week Collect RASO.1CO Site RASO.7EO l Met Tower RASO.3MO Pit Eff Date Site 2S Met Tower 2S Pit Eff 2S 1
1/05/1993
.011
.001
.011
.001
.011
.001 2
1/12/1993
.019
.001
.018
.001
.016
.001 3
1/19/1993
.008
.001
.009
.001
.008
.001 4
1/26/1993
.058
.002
.050
.002
.079
.002 5
2/01/1993
.046
.002
.047
.002
.043
.002 6
2109/1993
.016
.001
.031
.001
.007
.001 7
2/16/1993
.017
.001
.013
.001
.014
.001 8
2/23/1993
.009
.001
.007
.001
.008
.001 9
3/01/1993
.014
.001
.012
.001
.011
.001 10_
3/09/1993
.022
.001
.005
.001
.022
.001 11 3/16/1993
.037
.002
.030
.001
.038
.002 12 3/23/1993
.008
.001
.006
.001
.009
.001 13 3/30/1993
.020
.002
.015
.001
.019
.001 14 4/05/1993
.018
.002
.012
.001
.017
.001 15 4/12/1993
.033
.002
.027
.001
.029
.002
_ 16 4/20/1993
.014
.001
.010
.001 (a)
(a) 17 4/26/1993
.012
.001
.011
.001
.008
.001 18 5/04/1993
.046
.003
.044
.003
.042
.003 19 5/11/1993
.031
.002
.036
.002
.034
.002 i
20 5/18/1993
.017
.002
.015
.001
.016
.001 21 5/25/1993
.011
.001
.005
.001
.009
.001 22 6/01/1993
.012
.001
.012
.001
.015
.001 23 6/09/1993
.011
.001
.009
.001
.011
.001 24 6/15/1993
.038
.002
.040
.002
.048
.002 25 6/22/1993
.036
.002
.030
.001
.033
.002 26 6/29/1993
.025
.002
.022
.001
.024
.001 (a)
Sample not collected, air sampler not returned to service after weekly change-out Rancho Seco F-2 1993 AREOR I
TABLE F-1 1993 WEEKLY AIR SAMPLE
SUMMARY
(continued)
Gross Beta Activity in Air Particulates (pCi/m )
Week Collect RASO.1CO Site RASO.7EO Met Tower RASO.3MO Pit Eff Date Site 2S Met Tower 2S Pit Eff 2S 27 7/06/1993
.024
.001
.021
.001
.020
.001 28 7/13/1993
.065
.002
.037
.001
.046
.002 29 7/20/1993
.025
.002
.018
.001
.021
.001 30 7/27/1993
.045
.002
.036
.002
.044
.002 31 8/03/1993
.043
.002
.030
.001
.053
.002 32 8/10/1993
.014
.001
.015
.001
'013
.001 33 8/17/1993
.031
.001
.012
.001
.011
.001 34 8/24/1993
.017
.001
.017
.001
.018
.001 35 8/31/1993
.017
.001
.019
.001
.020-
.001 36 9/07/1993
.018
.001
.017
.001
.018
.001 37 9/14/1993
.034
.002
.034
.002
.036
.002 38 9/21/1993
.020
.001
.019
.001
.019
.001 39 9/28/1993
.043
.002
.035
.002
.037
.002 40 10/05/1993
.032
.002
.033
.002
.031
.002 41 10/12/1993
.017
.001
.018
.001
.017
.001 42 10/19/1993
.013
.001
.015
.001
.014
.001 43 10/26/1993
.039
.002
.047
.002
.040
.002 L
44 11/02/1993
.048
.002
.043
.002
.056
.002 45 11/08/1993
.050
.002
.047
.002
.048
.002 46 11/16/1993
.030
.001
.031
.001
.031
.001 47 11/23/1993
.052
.002
.051
.002
.050
.002 48 11/30/1993
.047
.002
.050
.002
.049
.002 49 12/07/1993
.021
.001
.021
.001
.020
.001 50 12/13/1993
.024
.001
.025
.001
.022
.001 51 12/21/1993
.024
.001
.027
.001
.024
.001 52 12/28/1993
.051
.002
.048
.002
.052
.002 4
Rancho Seco F-3 1993 AREOR
Table F-2 1993 TLD Summary (Direct Radiation)
Quarterly (mrem)
Location TLD Location / Indicator / Control 1993 1993 1993 1993 Number ID Number i Special 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter.
1 RTLO.3RO INDICATOR 18 9 22.4 16 6 17.3 2
RTLO 3CO INDICATOR 24 5 15 5 17 4 18 3 3
RTLO 3NO INDICATOR 18.6 16 3 15.5 17 8 4
RTLO 3LO INDICATOR 18 1 16.1 21 8 17 5 5
RTLO 3HO INDICATOR 18.6 16.1 15 9 17 3 6
RTLO 4FO INDICATOR 18 8 15.8 17 3 15.1 7
RTLO SCO INDICATOR 19 2 16 6 15 9 18 0 11 RTLO6KO INDICATOR 16.1 13 9 14 4 17.2 16 RTL2.7MO INDICATOR 20 9 15.1 14.1 14 8 17 RTL8 2KO CONTROL 27 5 19 3 19 4 20 5 18 RTL7 8CO CONTROL 16 1 13 9 20 2 18 9 19 RTL18FO INDICATOR 15 1 13.1 13 9 14 2 20 RTL1 SMO INDICATOR 19 0 14 9 16.1 16.7 26 RTL3 9KO INDICATOR 22.7 14 6 15.8 15 8 30 RTL7 4MO CONTROL 16.8 15.0 16.3 19 8 31 RTL3 7NO
'NDICATOR 17 8 16 6 16 1 17.5 33 RTL3 8MO INDICATOR 19.3 18 4 17 6 16.6 35 RTL19NO INDICATOR 17 5 17 1 19.1 18 6 43 RTL17GO INDICATOR 19 3 (c) 15 8 15.9 46 RTL14DO INDICATOR 25 3 17 0 18 6 18 5 55 RTL8 OPO CONTROL 16.1 79 15 9 17.3 63 RTLO BDO INDICATOR 21 7
'46 14 9 16 3 65 RTLO 6MO SPECIAL 15 5 14.3 19.4 15.5 66 RTLD 4NO SPECIAL 41.4 45 9 38 2 38 8 l
67 RTLO 4NO1 SPECIAL 18.9 18.0 18.7 17.2 68 RTLO 3PO SPECIAL 19 0 15 3 16 2 16 4 84 RTLO.1MP SPECIAL 17.5 (a)
(a)
(a) 85 R TLO.1LP SPECIAL 18 0 (a)
(a)
(a)
B6 RTLO.2LP SPECIAL 19.4 (a)
(a)
(a) 87 RTLO 2MP SPECIAL 15.7
,[a)
(a) ta) 88 RTLO 3NP SPECIAL (b) 15.7 18 4 21 2
'{
89 RTLD 4NP SPECIAL (b) 14 4 20 4 16 4 i
90 RTLO.5NP SPECIAL (b) 11 9 12.7 13.7 91 RTLO 3OP SPECIAL (b) 15 8 16 5 17 5 i
(a)
Location deleted 2nd quarter 1993 (b)
Location added 2nd quarter 1993 (c)
TLD missing at change-out Rancho Seco F-4 1993 AREOR 1
P Table F-3 1993 Garden Vegetables (pCi/kg, wet)
Sample ID Location Narne Type 3 Collectum Mn44 Co48 Fe49 Co40 Zn45 Zr!Nb-l-131 Cs-134 Cs-137 Cs-137 Ba/La-Date 95 t2S 140 RLV0 6MO trrgated Garden Cabbage 1/12/1993
<20
<56
<52
<24
<52
<29
<60
<25
<26
<144 (Broadleaf 81)
RLV0 6MO trrgated Garden Broccok 1/12/1993
<59
<63
<131
<56
<132
<70
<132
<58
<62
<349 (Broadleaf #2)
RLV0 6MO trrgated Garden Lettuce 1/12/1993
<27
<28
<60
<28
<58
<32
<70
<27
<30
<179 (Broadleaf #3)
RLV0 6MO.
Ingated Garden Tumsp 1/12/1993
<25
<24
<57
<24
<56
<27
<60
<24
<26
<142 (Vegetable #1)
RLV0 6MO trrgated Garden Carrot 1/12/1993
<43
<44
<98
<39
<99
<53
<104
<38
<44
<257 (Vegetable #2)
RLV18.0KO Lodi Produce (Broadleaf Cabbage 1!12/1993
<29
<29
<62
<28
<63
<33
<60
<27
<29
<178
- 1)
RLV18 OKO Lodi Produce (Broadleaf Broccot 1/12/1993
<24
<24
<57
<24
<59
<28
<60
<24
<26
<143
- 2)
RLV18 OKO Lodi Produce Potato 1/12/1993
<28
<29
<63
<28
<64
<34
<60
<26
<28
<162 (Vegetable)
RLV0 6MO trrgated Garden Japanese 9/07/1993
<41
<39
<74
<43
<86
<43
<60
<39
<46
<178 (Broadleaf #1)
Cucumber RLVO 6MO Irrgated Garden Tomatoes 9/07/1993
<45
<47
<87
<44
<99
<48
<60
<44
<48
<195 (Vegetable #1)
RLVO 6MO trngated Garden Cucumber 907/1993
<39
<46
<92
<46
<93
<'A
<60
<40
<50
<195 (Vegetable #2)
RLV18 OKO LodiProduce Tomatoes
&C7/1993
<41
<41
<92
<43
<90
<46
<60
<41
<44
<186 (Vegetable #1)
RLV18 OKO Lodi Produce Onxins SC7/1993
<43
<35
<80 G
<55
<40
<60
<38
<42
<155 (Vegetable #2)
RLVO 6MO trreated Garden Tomatoes 11K12/1993
<14
<14
<31
<14
<30
<16
<31
<13 18 4
<78 RLV18 OKO Lodi Produce Cabbage 11K)4/1993
<10
<10
<21
<10
<21
<11
<16
<10
<10
<46 Rancho e F-5 1993 AREOR
TABLE F-4 1993 Raw Milk Maderios Dairy RMF5.8PO Monthly Indicator (pCi/L)
Collection Date Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 l-131 Cs-134 Cs-137 Ba/La-140 Nb-95 1/19/1993-
<7
<8
<18
<8
<16
<9
<23
<7
<7
<51 2/23/1993
<3
<3
<7
<3
<7
<3
<6
<3
<3
<16 3/23/1993
<3
<3
<7
<3
<7
<3
<6
<3
<3
<15 4/20/1993
<5
<5
<10
<5
<11
<5
<9
<4
<5
<24 5/18/1993
<3
<3
<7
<4
<7
<3
<5
<3
<4
<14 6/22/1993
<4
<4
<10
<4
<10
<5
<9
<4
<5
<24 7/20/1993
<4
<4
<8
<4
<8
<4
<5
<3
<4
<15 8/24/1993
<5
<5
<11
<6
<12
<5
<7
<5
<6
<21 9/21/1993
<S
<5
<10
<5
<11
<5
<6
<4
<5
<19 10/19/1993
<9
<8
<19
<8
<20
<9
<10
<8
<9
<32 11/23/1993
<3
<3
<8
<3
<7
<4
<7
<3
<3
<18 12/21/1993
<7
<7
<16
<7
<15
-<7
<15
<7
<7
<37 Rancho Seco.
F-6 1993 AREOR
-TABLE F-4 (continued) 1993 Raw Milk Maderios Dairy RMF5.8POQ Quarterly Quality Assurance Control (pCi/L)
Collection Date Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95/
l-131 Cs-134 Cs-137 Ba/La-140 Nb-95 2/23/1993
<3
<3
<7
<3
<7
<4
<7
<3
<3
<18 5/18/1993
<3
<3
<7
<3
<7
<3
<4
<3
<3
<13 8/24/1993
<5
<5
<12
<6
<12
<5
<7
<5
<6
<21 11/23/1993
<3
<3
<7
<3
<7
<4
<7
<3-
<3
<17 Rancho Seco F-7 1993 AREOR 6
TABLE F-5 1993 SOIL AND SEDIMENT (Mud and Silt)
Quarterly / Semi-Annual (pCi/kg)
Stmple ID Class Location Collection Mn-54 Co-58 Fe-59 Co40 Co40 Zn45 Zr/Nb-95 1-131 Cs-134 Cs-137 Cs-1 *J
{ Bar.a-140' Description Date 2S RMSO.3MO IND Eftluent 2/16/1993
<31
<30
<75
<34
<63
<43
<144
<27 387 43
<303 t2S Discharge RMSO6MO INO Site Boundary 2/16/1993
<34
<39
<86 131 43
<78
<49
<173
<33 1189 58
<354 RMSO7NO IND Water Sump 2/16/1993
<25
<26
<57
<20
<50
<33
<110
<22 120 32
<233 RMS1.BNO IND Hadsehnlle /
2/16/1993
<17
<27
<67
<25
<59
<36
<119
<21 333 26
<239 Clay Creeks RMS3.7NO IND Folsom South 2/16/1993
<15
<15
<36
<16
<35
<19
<49
<14 271 15
<107 Canal RSLO 2HO IND Storm Drain #6 2/16/1993
<32
<35
<78
<25
<66
<50
<192
<29 87 29
<365 RSLO.2HO1 IND Storm Drain #1 2/16/1993
<23
<24
<61
<22
<50
<34
<135
<19
<23
<254 RSLO 2HO2 IND Storm Drain #1 2/16/1993
<31
<34
<85
<29
<71
<47
<187
<26
<31
<343 RSLO.2JO IND Storm Drain #2 2/16/1993
<31
<32
<75
<29 (69
<44
<138
<27
<33
<28 RSLO.2KO IND Storm Drain #4 2/16/1993
<22
<24
<58
<23
<50
<23
<136
<19 58 19
<244 RSLO.3AO IND Ncrth Site 2/16/1993
<23
<25
<60
<23
<52
<32
<119
<19 84 19
<231 Garden RSLO 3LO IND Storm Drain #5 2/16/1993
<26
<26
<62
<24
<56
<35
<119
<23 40 19
<252 RSLO.3MO7 IND Storm Drain #7 2/16/1993
<18
<19
<48
<19
<40
<26
<105
<15 50 15
<193 RSLO 3MO8 IND Storm Drain #8 2/16/1993
<18
<20
<49
<19
<42
<27
<104
<17 33 16
<195 RSLO.3MO9 IND Storm Drain #9 2/16/1993
<22
<24
<53
<18
<46
<33
<106
<20 20 13
<231 RSLO.3NO IND Storm Drain 2/16/1993
<26
<26
<64
<23
<57
<35
<127
<21 99 21
<242
- 12 RSLO.3OO IND Storm Drain 2/16/1993
<16
<16
<39
<15
<34
<22
<80
<13 17 12
<155
- 10 RSLO.6MO IND Site Boundary 2/16/1993
<19
<21
<50 429 31
<44
<28
<122 73+-14 2958 49
<222 RSLO7NO IND Water Sump 2/16/1993
<30
<32
<83
<30
<65
<46
<206
<28 249 33
<378 RSL1.5NO IND Silva Ranch 2/16/1993
<49
<54
<132 850 65
<117
<71
<265 57+-
3256 72
<510 RSL1.8NO IND Hadselville /
2/16/1993
<20
<21
<55 59 211
<48
<29
<116 14 +-
624 28
<206 285 Clay Creeks 120 Rancho Seco F-8 1993 AREOR
TABLE F-5 (continued) 1993 SO!L AND SEDIMENT (Mud and Silt)
Quarterly / Semi-Annual (pCi/kg)
Simple ID Class Location Collection M n-54 Co-58 Fe-59 Co-60 Co-60 Zn45 Zr/Nb-95 1-131 Cs-134 Cs-137 Cs-137 Ba/La-140 Description Date 2S 2S RMSO.3MO IND Effluent 5/26/1993
<5
<5
<10
<6
<11
<5
<6
<5 57 5
<19 Discharge RMS06MO IND S:te Boundary 5/26/1993
<5
<5
<10 37 6
<12
<6
<6 13+-3 490 10
<21 RMSO.3MO IND -
Effluent 8/16/1993
<7
<7
<16
<8
<17
<9
<12
<8 53 7
<36 Discharge RMSO.6MO IND Site Boundary 8/16/1993
<2
<5 411 12 2
<12
<6
<8
<5 170 4
<26 RMSO7NO IND Water Sump 8/16/1993
<6
<5
<11
<6
<13
<6
<9
<6 75 6
<25 RMS18NO IND Hadselvitle/
8/16/1993
<4
<5
<11
<6
<12
<6
<7
<5 74 6
<21 Clay Creeks RMS3.7NO.
IND Folsom South 8/16/1993
<2
<5
<11
<5
<12
<6
<7
<5 161 4
<22 Canal RSLO.2HO IND Storm Drain #6 8/16/1993
<19
<16
<41
<21
<42
<20
<25
<16 127 17
<82 RSLO.2HO1 IND Storm Drain #1 8/16/1993
<14
<13
<30
<14
<32
<16
<24
<13 50 14
<69 RSLO 2HO2 IND Storm Drain #2 8/16/1993
<8
<8
<18
<9
<18 (9
<12
<7 21 7
<38 RSLO 2JO IND Storm Drain #3 8/16/1993
<25
<25
<55 247 33
<58
<29
<37 36+-15 1239 42
<118 RSLO 2KO IND Storm Drain #4 8/16/1993
<3
<9
<20 44 6
<22
<11
<16
<9 175 5
<46 RSLO.3AO IND Storm Drain 8/16/1993
<9
<9
<20
<9
<22
<10
<14
<8 25 4
<39
- 10 RSLO 3LO IND Storm Drain #5 8/16/1993
<4
<6
<13
<6
<13
<7
<9
<5 41 6
<27 RSLO 3MO7 IND Storm Drain #7 8/16/1993
<16
<14
<34
<15
<35
<17
<22
<13 37 11
<68 RSLO.3MO8
.ND Storm Drain #8 8/16/1993
<15
<14
<33
<17
<35
<17
<21
<13 99 13
<65 RSLO.3MO9 IND Storm Drain #9 8/16/1993
<*J
<17
<38
<18
<41
<21
<23
<15 76 18
<73 RSLR3NO IND Storm Drain 8/16/1993
-1t'
<17
<36
<17
<38
<19
<25
<15 18 13
<77
- 12 RSLO.3OO IND Storm Drain 8/16/1993
<4 '
<11
<25
<12
<27
<15
<21
<11 166 6
<62
- 11 l
Rancho Seco F-9 1993 AREOR
TABLE F-5 (continued) 1993 SOIL AND SEDIMENT (Mud and Silt)
Quarterly / Semi-Annual (PCi/kg)
Simple ID Class Location Collection M ;.54 Co48 Fe-59 Co40 Co40 Zn45 Zr/Nb-95 l-131 Cs-134 Cs-137 Cs-137 Ba/La-140 Description Date 2S 2S RSLO.6MO IND Site Boundary 8/16/1993
<12
<11
<24
<13
<26
<13
<22 17+-8 100 21
<59 RSLO.7NO IND Water Sump 8/16/1993
<4
<11
<26 19 5
<26
<14
<19
<12 479 9
<56 RSL1 SNO IND bilva Ranch 8/16/1993
<23
<21
<51 690 35
<53
<25
<35 48+-17 297 48
<110 RSLt.8NO IND Hadselville/
8/16/1993
<22
<22
<48 129 23
<51
<27
<41
<23 927 31
<118 Clay Creeks RSLO 4MP1 IND Grid Pt. Al-15 8/17/1993
<40
<40
<93 3639 80
<98
<93
<119 1875+-
70890 250
<33 52 RSLO.4MP2 IND Grid Pt. Al-14 8/17/1993
<23
<23
<48 1124 38
<53
<26
<82 872+-
33440 130
<202 28 RSLO.4MP3 IND Gnd Pt. Al-12 8/17/1993
<27
<27
<61 562 41
<62
<30
<65 410+-
17310 130
<184 29 RMSO.3MO IND Effluent 11/17/1993
<8
<8
<17
<9
<18
<9
<12
<8 93 5
<37 Discharge RMS06MO IND Site Boundary 11/17/1993
<9
<9
<20-54 12
<21
<10
<16 22+-6 987 20
<45 Rancho Seco F-10 1993 AREOR
TABLE F-6 1993 FISH Semi-Annual (pCi/kg, wet)
Sample ID Class Location Predatori Date Mn-54 Co-58 Fe-59 Co-60 Zn45 Zr/Nb-I-131 Cs-134 Cs-137 Scavenger 95 2S RFSO.6MO1 IND Site Predator 7/01/1993
<12
<12
<27
<11
<26
<14
<32
<11 29+-10 Boundary RFSO.6MO1 IND Site Predator 12/28/1993
<15
<16
<37
<16
<34
<18
<46
<15 53+-16 Boundary RFSO.6MO2 IND Site Scavenger 12/28/1993
<18
<18
<39
<18
<38
<20
<53
<17 36+-13 Boundary Rancho Seco F-11 1993 AREOR
=
TABLE F-7 1993 ALGAE Semi-annual (pCi/kg, wet)
- Sample ID Class Location Date Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr/Nb-I-131 Cs-134 Cs-137 Cs-137 95 2S RAGO.3MO IND Effluent 3/03/1993
<36
<37
<78
<39
<80
<41
<70
<33 114 32 Discharge RAGO.6MO IND Site 3/03/1993
<32
<34
<73
<34
<72
<39
<72
<30 121 310 Boundary RAGO.7NO IND Water 3/03/1993
<41
<44
<97
<42
<98
<49
<91
<38
<45 Sump RAGO.3MO IND Effluent 9/01/1993
<36
<35
<74
<37
<77
<36
<60
<34 63 14 Discharge RAGO.6MO IND Site 9/01/1993
<35
<36
<82
<45
<86
<40
<60
<36 84 37 Boundary RAGO.7NO IND Water 9/01/1993
<33
<39
<100
<44
<81
<44
<59
<35 74 42 Sump RAG 1.8NO IND Hadselville 9/01/1993
<33
<37
<74
<38
<76
<40
<60
<33
<42
/ Clay Creeks RAG 3.7NO IND Folsom 9/01/1993
<34
<35
<88
<42
<91
<43
<60
<35 74 17 South Canal Rancho Seco F-12 1993 AREOR
TABLE F-8 1993 WELL WATER Quarterly (pCi/L)
Srmple ID Class Location Date Mn-54 l Co-58 Fe-59 Co-60 Zn-65 Zr/Nb-95 l-131 Cs-134 Cs-137 Ba/La-140 ' Tritium RWWO 800 CON Marcial Ranch 3/23/1993
<3
<3
<7
<4
<7
<4
<5
<3
<4
<16
<822 RWWO 8LO IND Clay Area Feed Lot 3/23/1993
<3
<3
<7
<4
<7
<4
<6
<3
<4
<17
<831 RWW2.1MO IND Clay Area Well 3/23/1993
<4
<4
<9
<5
<10
<S
<7
<4
<5
<20-
<822 (Tippling's)
RWW3.7MO IND Silva Feed Lot 3/23/1993
<3
<3
<7
<4
<8
<4
<6
<3
<4
<16
<829 RWWO 3EO IND Sde Well 6/22/1993
<4
<4
<9
<4
<8
<5
<8
<4
<4
<21
<751 RWWD.8DO CON Marcial Ranch 6/22/1993
<7
<6
<15
<7
<15
<12
<14
<6
<7
<36
<754 RWWO 8LO IND Clay Area Feed Lot 6/22/1993
<7
<7
<15
<7
<14
<8
<14
<6
<7
<36
<757 RWW2.1MO IND -
Clay Area Well 6/22/1993
<4
<4
<10
<5
<9
<5
<9
<4
<4
<22
<758 (Tipphngs)
RWW3 7MO IND Silva Feed Lot 6/22/1993
<5
<5
<10
<5
<10
<5
<10
<5
<5
<25
<763 RWWO 3EO IND Site Well 9/20/1993
<5
<S
<11
<5
<12
<6
<7
<5
<5
<21
<728 RWWO 8DO CON Marcial Ranch 9/20/1993 (6
<6
<12
<6
<15
<4
<8
<7
<7
<24
<727 i
RW'NO. 8LO IND Clay Area Feed Lot 9/20/1993
<5
<5
<10
<5
<10
<5
<6
<4
<5
<19
<729 RWW2.1MO IND Clay Area Well 9/20/1993
<6
<5
<12
<6
<14
<6
<8
<6
<6
<24
<732 (Tipplings)
RWW3.7MO ING Silva Feed Lot 9/20/1993
<4
<4
<9
<4
<9
<4
<6
<4
<4
<17
<729 RWWO.3EO IND Site Well 12/21/199
<7
<8
<17
<8
<16
<8
<15
<7
<7
<41
<686 3
RWWO.8DO CON Marcial Ranch 12/21/199
<8
<9
<19
<9
<20
<9
<15
<7
<8
<40
<680 3
RWWO.8LO IND Clay Area Feed Lot 12/21/199
<8
<8
<18
<8
<18
<9
<16
<7
<9
<44 (684 3
RWW2.1MO IND Clay Area Weil 12/21/199
<6
<6
<14
<6
<14
<7
<15
<6
<7
<37
<684 (Tipplings) 3 RWW3.7i40 IND Silva Feed Lot 12/21/199
<7
<7
<17
<7
<16
<9
<15
<i
<8
<39
<684 3
Rancho Seco F-13 1993 AREOR
TABLE F-9 1993 RUNOFF WATER Biweekly (pCi/L)
Sample ID Location Date Tritium Mn-54
. Co-58 Fe-59 Co-60 Zn-65 Zr/Nb-95 l-131 Cs-134 Cs-137 Ba/La-140 RRWD.6MO Site 1/05/1993
<900
<3
<3
<7
<3
<7
<4
<8
<3
<3
<19 Boundary RRWO6MO.
Site 1/19/1993
<859
<S
<5
<10
<5
<11
<5
<6
<5
<5
<20 Boundary RRWO6MOQ Site 1/19/1993
<857
<3
<3 (6
<3
<7
<3
<5
<3
<3
<16
- Boundary, QA RRWO6MO Site 2/01/1993
<762
<7
<7
<16
<7
<14
<9
<28 (6
<7
<60 Boundary RRWOGMO Site 2/16/1993
<851
<3
<3
<7
<3 (6
<3
<5
<3
<3
<15 Boundary RRWO6MOQ Site 2/16/1993
<854
<3
<3
<7
<3
<6
<3
<5
<3
<3
<15 Boundary; QA RRWO6MO Site 3/01/1993
<822
<3
<3
<6
<3
<6
<3
<4
<3
<3
<14 Boundary RRWO.6MO Site 3/16/1993
<859
<3
<3
<7
<3
<7
<3
<5
<3
<3
<15 Boundary RRWO.6MOQ Site 3/16/1993
<757
<3
<3
<6
<3 (6
<3
<4
<3
<3
<12 Boundary; QA RRWO.6MO Site 3/30/1993
<758
<4
<3
<8-
<4
<7
<4
<6
<3
<4
<17 Boundary RRWO.6MO Srte 4/12/1993
<756
<3
<3
<6
<3
<6
<3
<5
<3
<3
<14 Boundary RRWD6MO Site 4/28/1993
<808
<4
<4
<9
<4
<8
<5
<11
<4
<4
<25 Boundary RRWO.6MOQ Site 4/28/1993
<823
<3
<3
<8
<3
<7
<4
<9
<3
<3
<21 Boundary; QA-Rancho Seco F-14 1993 AREOR
TABLE F-9 (continued) 1993 RUNOFF WATER
- Biweekly (pCi/L)
Sample ID Location Date Tritium Mn-54 Co-58 Fe-59 Co40 Zn45 Zr/Nb-95 1-131 Cs-134 Cs-137 Ba/La-140 RRWO.6MO Site 5/11/1993
<875
<4
<4
<7
<4
<8
<4
<5
<4
<4
<17 Boundary RRWO6MO Site 5/26/1993
<767
<3
<3
<7
<3
<7
<3
<5
<3
<4
<15 Boundary RRWO.6MOQ Site 5/26/1993
<772
<3
<3
<7
<3
<7
<3
<5
<3
<3
<14 Boundary; QA RRWO6MO Site 6/09/1993
<820
<3
<3
<7
<3
<7
<3
<6
<3
<3
<16 Boundary RRWO6MO Site 6/22!1993
<800
<6
<7
<14
<6
<15
<7
<14
<7
<7
<36 Boundary RRWO6MOQ Site 6/22/1993
<800
<7
<7
<16
<8
<16
<8
<13
<7
<8
<37 Boundary; QA RRWO.6MO Site 7/06/1993
<822
<10
<9
<21
<11
<24
<9
<13
<9
<11
<40 Boundary RRWO6MO Site 7/20/1993
<814
<4
<4
<10
<4
<9
<5
<7
<4
<5
<21 Boundary RRWO.6MOQ Site 7/20/1993
<837
<4
<4
<8
<4
<B
<4
<6
<4
<4
<19 Boundary; QA RRWO.6MO Site 8/03/1993
<808
<7
<7
<14
<7
<16
<7
<10
<7
<8
<29 Boundary RRWO6MO Site 8/17/1993
<813
<6
<7
<13
<6
<13
<6
<7
<5
<6
<25 Boundary RRWO6MOQ Site 8/17/1993
<813
<5
<5
<11
<6
<12
<6
<7
<5
<6
<21 Boundary; QA RRWO6MO Site 8/31/1993
<685
<4
<3
<7
<3
<8
<4
<6
<3
<4
<18 Boundary
. Rancho Seco F-15 1993 AREOR
.~
TABLE F-9 (continued) 1993 RUNOFF WATER Biweekly (PCi/L)
Sample ID Location Date Tritium Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr/Nb-95 l-131 Cs-134 Cs-137
' Ba/La-140 RRWO.6MO Site 9/14/1993
<683
<5
<5
<11
<5
<11
<5
<7
<5
<5
<21 Boundary RRWO.6MOQ Site 9/14/1993
<687
<5
<4
<10
<5
<10
<5
<6
<4
<5 (6
Boundary; QA RRWO6MO Site 9/28/1993
<711
<5
<5
<10
<5
<11
<5
<6
<5
<5
<21 Boundary RRWO.6MO Site 10/12/1993
<697
<9
<10
<20
<10
<18
<10
<11
<8
<11
<34 Boundary RRWO.6MOQ Site 10/12/1993
<697
<9
<9
<18
<9
<17
<9
<10
<8
<8
<31 Boundary; QA RRWO6MO Site 10/26/1993 (690
<3
<3
<7
<3
<7
<3
<5
<3
<3
<15 Boundary RRWO.6MO Site 11/08/1993
<668
<9
<8
<19
<9
<19
<9
<10
<8
<9
<37 Boundary RRWO.6MOQ Site 11/08/1993-
<664
<7
<7
<15
<7
<16
<8
<9
<7
<8
<30 Boundary; QA RRWO.6MO Site 11/23/1993
<563
<4
<4
<8
<4
<8
<4
<9
<4
<4
<22 Boundary RRWO6MO Site 12/07/1993
<667
<12
<14
<27
<11
<28
<12
<14
<11
<15
<46 Boundary RRWO6MOQ Site 12/07/1993
<679
<11
<12
<22
<12
<24
<12
<15
<11
<12
<49 Boundary; QA RRWO.6MO Site 12/28/1993
<723
<8
<8
<17
<8
<18
<8
<15
<7 (5
<39 Boundary Rancho Seco F-16 1993 AREOR
TABLE F-10 1993 SURFACE WATER Monthly Grab / Monthly Composite (pCi/L)
Sample ID Class Location Date H-3 Mn-54 Co-58 Fe-59 Co40 Zn45 Zr/Nb-95 l-131 Cs-134 Cs-Ba!La-140 137 RSWO.7NO IND W ater 1/19/1993
<901
<3
<3
<7
<3
<7
<4
<8
<3
<3
<19 Sump RSW1.3FO CON Rancho 1/19/1993
<869
<4
<4
<10
<4
<8
<6
<4
<3
<4
<60 Seco Reservoir RSW1.8NO IND Hadselwlle/
1/19/1993
<886
<3
<4
<9
<3
<7
<5
<38
<3
<3
<53 Clay Creeks RSWO.3MO IND Emuent 1/28/1993
<759
<2
<3
<7
<3
<6
<4
<9
<3
<3
<22 Discharge RSW3 7NO CON Folsom 1/28/1993
<763
<3
<3
<8
<3
<7
<4
<9
<3
<3
<20 South Canal RSWO.7NO IND W ater 2/23/1993
<885
<8
<8
<17
<7
<17
<9
<27
<7
<8
<56 Sump RSW1.3FO CON Rancho 2/23/1993
<854
<8
<9
<19
<7
<16
<9
<27
<7
<8
<56 Seco Reservoir RSW1.8NO -
IND Hadselville/
2/23/1993
<900
<7
<8
<18
<8
<16
<10
<27
<7
<8
<57 Clay Creeks RSW1.8NOQ IND Hadselw!!el 2/23/1993
<893
<7
<8
<18
<8
<16
<9
<25
<6
<7
<60 Clay Creeks RSWO.3MO IND Emuent 3/01/1993
<829
<3
<3
<S
<3
<6
<3
<4
<3
<3
<12 Discharge RSW3.7NO CON Folsom 3/01/1993
<828
<5
<5
<10
<5
<11
<5
<7
<5
<5
<23 South Canal Rancho Seco F-17 1993 AREOR
TABLE F-10 (continued) 1993 SURFACE WATER Monthly Grab / Monthly Composite (pCi/L)
Sample ID Class Location Date H-3 Mn44 Co-58 Fe-59 Co40 Zn-65 Zr/Nb-95 l-131 Cs-134 Cs-Ba/La-140 137 RSWO.7NO IND Water 3/23/1993
<869
<3
<3
<7
<3
<7
<3
<7
<3
<3
<19 sump RSW1.3FO CON Rancho 3/23/1993
<871
<3
<3
<7
<3
<7
<3
<7
<3
<3
<19 Seco Reservoir RSW1.8NO IND Hadselvtile/
3/23/1993
<860
<3
<3
<8
<3
<7
<4
<9
<3
<3
<21 Clay Creeks RSWO.3MO IND Emuent 3/30/1993
<748
<3
<3
<7
<3
<7
<3
<5
<3
<3
<14 Discharge RSW3.7NO CON Folsom 3/30/1993
<758
<3
<3
<7
<3
<7
<4
<9
<3
<3
<20 South Canal RSWO.7NO IND W ater 4/20/1993
<893
<4
<4
<8
<4
<8
<4
<12
<3
<4
<2S Sump RSW1.3FO CON Rancho 4/20/1993
<871
<3
<3
<8
<3
<7
<4
<10
<3
<3
<24 Seco Reservoir RSW1.8NO IND Hadsehn!!el 4/20/1993
<879 44
<4
<8
<4
<8
<4
<7
<4
<4
<19 Clay Creeks RSW1.8NOQ IND Hadselville/
4!20/1993
<862
<3
<3
<7
<3
<7
<4
<9
<3
<3
<22 Clay Creeks RSWO.3MO IND Emuent 4/28/1993
<790
<3
<3
<7
<3
<7
<4
<7
<3
<3
<19 Discharge RSW3.7NO CON Folsom 4/28/1993
<828
<4
<4
<8
<3
<8
<4
<8
<3
<4
<21 South Canal Rancho Seco F-18 1993 AREOR
TABLE F-10 (continued) 1993 SURFACE WATER Monthly Grab / Monthly Composite (pCi/L)
Sample ID Class Location Date H-3 Mn-54 Co-58 Fe-59 Co40 Zn45 Zr/Nb-95 l-131 Cs-134 Cs-Ba/La-140 137 RSWO.3MO IND Effluent 5/26/1993
<766
<3
<3
<7
<3
<7
<4
<6
<3
<4
<16-Discharge RSWD.7NO IND W ater 5/26/1993
<772
<3
<3 (6
<3
<6
<3
<5
<3
<3
<14 Sump RSW1.3FO CON.
Rancho 5/26/1993
<777
<4 c4
<10
<4
<9
<5
<15
<4
<4
<32 Seco Reservoir RSW1.8NO IND Hadselville/
5/26/1993
<777
<3
<3
<6
<3
<7
<3
<5
<3
<3
<14 Clay Creeks RSW3.7NO CON Folsom 5/26/1993
<776
<3
<3
<6
<3
<7
<3 (4
<3-
<3
<14 South -
Canal RSWD.7NO IND W ater 6/22/1993
<798
<3
<3
<7
<3
<7
<4
<5
<3
<3
<14 Sump RSW1.3FO CON Rancho 6/22/1993
<795
<3
<3
<6
<3
<6
<3
<4
<3
<3
<13 Seco Reservoir RSW1.8NO IND Hadselvittel 6/22/1993
<807
<3
<3
<7
<4
<8
<4
<6
<3
<4
<17 Clay Creeks RSW1.8NOQ IND Hadselville/
6/22/1993
<812
<7
<7
<17
<8
<16
<8
<14
<7
<7
<35 Clay Creeks RSWO.3MO IND Effluent 6/29/1993
<806
<6
<6
<13
<7
<14
<6
<11
<6
<6
<130 Discharge RSW3 7NO CON Folsom 6/29/1993
<817 (8
<7
<16
<7
<15
<8
<14
<8
<8
<38 South Canal Rancho Seco F-19.
1993 AREOR
TABLE F-10 (continued) 1993 SURFACE WATER Monthly Grab / Monthly Composite (pCi/L)
Sample ID Class Location Date H-3 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr/Nb-95 l-131 Cs-134 Cs-Ba/La-140 RSWO.7NO IND W ater 7/20/1993
<820
<3
<3
<6
<3 (6
<3
<S
<3
<3
<14 137 Sump RSW1.3FO CON Rancho 7/20/1993
<820
<4
<4
<8
<4
<8
<4
<6
<4
<4
<19 Seco Reservoir RSW1.8NO IND Hadselville/
7/20/1993
<820
<3
<3
<7
<3
<7
<3
<5
<3
<3
<14 Clay Creeks RSWO.3MO IND Effluent 7/27/1993
<807
<3
<3
<7
<3
<7
<4
<6
<3
<3 (17 Discharge RSW3.7NO CON Folsom 7/27/1993
<794
<3
<3
<7
<3 (6
<3
<6
<3
<3
<15 South Canal RSWO 7NO IND Water 8/24/1993
<691
<6
<6
<11
<6
<12
<6
<8
<6
<6
<24 Sump RSW1.3FO CON Rancho 8/24/1993
<688
<5
<5
<11
<5
<12
<6
<7
<5
<6
<23 Seco Reservoir RSW1.8NO IND Hadselville/
8/24/1993
<690
<5
<5
<10
<5
<11
<5
<7
<5
<5
<20 Clay Creeks RSW1.8NOQ IND Hadselville/
8/24/1993
<692
<5
<5
<12
<6
<11
<S
<7
<5
<6
<20 Clay Creeks RSWO.3MO IND Effluent 8/31/1993
<680
<S
<5
<11
<6
<12
<5
<7
<5
<S
<23 Discharge RSW3.7NO CON Folsom 8/31/1993
<680
<3
<3
<7
<3
<7
<3
<5
<3
<3
<15 South Canal Rancho Seco F-20 1993 AREOR
TABLE F-10 (continued) 1993 SURFACE WATER Monthly Grab / Monthly Composite (pCi/L)
Sample ID Class Location Date H4 Mn-54 Co-58 Fe49 Co40 Zn-65 Zr/Nb-95 l-131 Cs-134 Cs-Ba/La-140 137 RSWD 7NO IND W ater 9/21/1993
<705
<5
<5
<11
<5
<13
<6
<7
<6
<6
<22 Sump RSW1.3FO CON Rancho 9/21/1993
<703
<5
<4
<10
<5
<10
<5
<6
<4
<5
<19 Seco Reservoir RSW1.8NO IND Hadselvtile/
9/21/1993
<698
<6
<5
<11
<5
<11
<5
<I
<5
<6
<21 Clay Creeks RSWO.3MO IND Emuent 9/28/1993
<709
<4
<4
<8
<4
<9
<4
<5
<4
<4
<17 Discharge RSW3.7NO CON Folsom 9/28/1993
<709
<5
<5
<11
<5
<12
<5
<6
<5
<5
<20 South Canal RSWO.7NO IND W ater 10/19/1993
<702
<8
<7
<16
<8
<17
<7
<9
<7
<8
<29 Sump RSW1.3FO CON Rancho 10/19/1993
<702
<7
<7
<15
<8
<16
<8
<9
<7
<8
<27 Seco Reservoir RSW1.8NO IND Hadselvillel 10/19/1993
<698
<6
<6
<11
<7
<13
<6
<7
<6
<6
<22 Clay Creeks RSW1.8NOQ IND Hadselvillet 10/19/1993
<701
<6
<7
<14
<6
<15
<7
<8
<6
<7
<26 Clay Creeks RSWO.3MO IND Emuent 10/26/1993
<689
<3
<3
<7
<3
<7
<3
<5
<3
<3
<14 Discharge RSW3.7NO CON Folsom 10/26/1993
<687
<3
<3
<7.
<3
<6
<3
<5
<3
<3
<14 South Canal Rancho Seco F-21 1993 AREOR
TABLE F-10 (continued) 1993 SURFACE WATER Monthly Grab / Monthly Composite (pCi/L)
Sample ID Class Location Date H-3 Mn-54 Co-58 Fe-59 Co40 Zn-65 Zr/Nb-95 l-131 Cs-134 Cs-B aiLa 140 137 RSWO.7NO IND Water 11/23/1993
<675
<4
<4
<8
<4
<8
<4
<8
<4
<4
<20 Sump RSW1.3FO CON Rancho 11/23/1993
<671
<4
<4
<8
<4
<8
<4
<7
<3
<4
=18 Seco Reservoir RSW1.8NO IND Hadsehnllet 11/23/1993
<669
<4
<4
<8
<4
<7
<4
<B
<4
<4 G0 Clay Creeks RSWO.3MO IND Effluent 11/30/1993
<666
<7
<7
<13
<7
<16
<7
<8
<6
<8
<26 Discharge RSW3.7NO CON Folsom 11/30/1993
<661
<7
<6
<12
<7
<14
<7
<8
<6
<7
<27 South Canal RSWO.7NO IND W ater 12/21/1993
<732
<8
<8
<18
<9
<17
<8
<15
<7
<8
<40 Sump RSW1.3FO CON Rancho 12/21/1993
<730
<9
<10
<19
<8
<19
<10
<10
<8
<9
<45 Seco Reservoir RSW1.8NO IND Hadselvdle/
12/21/1993
<725
<7
<7
<15
<6
<15
<7
<15
<6
<7
<38 Clay Creeks RSW1.8NOQ IND Hadselvillet 12/21/1993
<728
<7
<7
<17
<8
<17
<8
<15
<7
<8
<38 Clay Creeks RSW3.7NO CON Folsom 12/28/1993
<658
<12
<11
<25
<11
<25
<12
<15
<12
<12
<46 South Canal Rancho Seco F-22 1993 AREOR
TABLE F-11 1993 Drinking Water Monthly (pCi/L)
Sample ID Class Location Date H4 Mn-54 Co48 Fe49 Co40 Zn45 Zr/Nb-95 l-131 Cs-134 Cs-137 Ba/La-140 RDWO.1GO IND Rancho 1/19/1993
<860
<3
<3
<6
<3
<3
<3
<5
<3
<3
<15 Seco Site RDWO.1GO IND Rancho 2/23/1993
<894
<8
<9
<20
<8
<18
<10
<30
<7
<8
<60 Seco Site RDWO.1GO IND Rancho 4/20/1993
<843
<4
<4
<10
<4
<9
<6
<27
<4
<4
<44 Seco Site RDWD.1GO IND Rancho 5/26/1993
<759
<3
<3
<6
<3
<6
<3
<5
<3
<3
<14 Seco Site RDWO.1GO IND Rancho 6/22/1993
<786
<4
<3
<7
<4
<7
<4
<5
<3
<4
<16 Seco Site RDWO.1GO IND Rancho 7/20/1993
<850
<5
<5
<11
<11
<5
<8
<5
<5
<23 Seco Site g__
RDWO.1GO IND Rancho 8/24/1993
<684
<5
<5
<11 a
<12
<6
<8
<S
<6
<22 Seco Site RDWO.1GO IND Rancho 9/21/1993
<712
<5
<5
<10
<5
<12
<3
<7
<5
<5
<21 Seco S:te RDWO.1GO IND Rancho 10/19/1993
<701
<6
<5
<12
<6
<13 (6
<7 (6
<6
<23 Seco Site RDWO.1GO IND Rancho 11/23/1993
<667
<3
<3
<6
<3
<6
<3
<6
<3
<3
<15 Seco Site RDWO.1GO IND Rancho 12/21/1993
<722
<9
<9
<20
<9
<21
<10
<15
<8
<9
<44 Seco Site Rancho Seco F-23 1993 AREOR
TABLE F-12 1993 Rain Water Seasonal (pCi/L)
Sample ID Class Date Mn-54 Co-58 Fe-59 Co40 Zn45 Zr/Nb-95 l-131 Cs-134 Cs-137 Ba/La-140 H-3 RRNO.8DO IND 12/28/1993
<12
<6
<24
<13
<29
<13
<13
<11
<13
<42
<660 Rancho Seco F 1993 AREOR
APPENDIX G MISSED SAMPLES In accordance with the REMP manual section 3.1, the following samples were not collected during 1993.
TLD (Direct radiation oathway)
Location # 43 RTL1.7FO, Rancho Seco Reservoir (Indicator)- This TLD was found missing during the 3rd quarter 1993 change-out. The area around the TLD location was searched for the missing TLD. Recent construction activities at this location (Rancho Seco Lake Well Enclosure) could have accounted for the missing TLD. The TLD was replaced during the change-out.
AIR SAMPLING fAirborne pathway)
RASO.1CO (On-Site; PAP Bldg Carport); (indicator) / RASO.3MO (On Site; Plant Effluent)
(indicator); Sample data was unavailable for these two locations for the sample period ending 2/1/93. During sample change-out the particulate filter papers for these two locations were placed in the same collection envelope. The sample analysis laboratory was unable to determine the correct sample ID as the filter papers are not labeled. The filters were counted and results obtained using he most conservative sample volume. Data for these two locations will be reported as the results for both locations. Corrective action taken was to conduct training for personnel performing sample collection. (PDQ 93-0015 / CTS 51141)
RASO.3MO (On-Site, Plant Effluent)(Indicator) During the weekly sample change-out conductad on 4/13/93, the air sampler was found not running. Sample data for this location will not se available for this sample period. The air sampler was restarted on 4/13/93.
Correctue action taken was to conduct training for personnel performing the sample collection.
(PDQ 93-9027 / CTS 51194)
RASO.3MO (On-Site, Plant Effluent)(indicator) During an inspection of the air sampler on 7/21/93 it was discovered that the air sampler at this location had not been restarted on 7/20/93 during the weekly change-out. The air sampler was started and sample data was collected for this location for this sample period. The air sampler did not meet the requirement of continuous sampling for this sample period. Corrective action was to revise the Surveillance Procedure to require a flow rate check after the sample has been collected and the air sampler is restarted. (PDQ 93-0043 / CTS 51247 / CAR 93-001)
Rancho Seco G1 1993 AREOR
MISSED SAMPLES
{ continued)
Surface Water (Waterborne pathway)
RSW3.7NO, Folsom South Canal, monthly composite (control)- Monthly composite sample for the month of February 1993 was not collected. There was insufficient sample volume to meet the required one gallon collection volume due to composite sampler malfunction. A 1/2 gallon sample was collected by the composite sampler prior to the sampler malfunction. The sample was sent to the analysis laboratory for counting. Corrective action taken was to verify sampler operation and power supply.
RSWO.3MO, Emuent Discharge, monthly composite (indicator)- Monthly composite sample for the month of December 1993 was not collected. There was insufficient sample volume to meet the required one gallon collection volume due to composite sampler malfunction.
Corrective action was to verify sampler operation and power supply.
Rancho Seco G-2 1993 AREOR