ML031180748
| ML031180748 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco, 07200011 |
| Issue date: | 04/22/2003 |
| From: | Redeker S Sacramento Municipal Utility District (SMUD) |
| To: | Merschoff E NRC Region 4 |
| Shared Package | |
| ML031180676 | List: |
| References | |
| +sispmjr200506, -RFPFR, MPC&D 03-051 | |
| Download: ML031180748 (18) | |
Text
TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL
SUMMARY
Rancho Seco Nuclear Station 12 2002 AREOR
TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL
SUMMARY
Name of Facility Rancho Seco Nuclear Station Docket No. DPR-54/ SNM 2510 Location of Facility Sacramento. California Reporting Period January - December 2002 (County, State)
Medium or Type and Lower All Indicator Location with Highest Annual Control locations Number of Pathway Total Limit of Locations Mean Mean (f) a Nonroutine Sampled Number of Detection a(f) Name Mean (f) Range Reported (Unit of Analysis (LLD)b Mean (an Measurements Measurement) Performed & Direction Air Particulates (pCi/M3) Gross f3 0.01 0.024 (106/106) RASO.3MO 0.024 (53/53) 0.023 (106/106) 0 (212) (0.009- 0.081) 0.3 miles 2470 (0.008-0.081) (0.008-0.072) y-spec (12) 1;'Cs 0.01 <LLD <LLD <LLD
'IC s- 0.01 <LLD~w <LLD <LLD Direct Radiation RTLO.4NO 30.0 (4/4)
(m Rem/qtr.) Luxel NA 17.3 (115-115) 0.4 miles 2700 (27-33) 17.1 (22/22) 0
.(139) (9-33) (11 -22)
Garden Vegetables y-spec (pCi/kg) 60o(9)
_____60_<L LD<LLD <LLD 0 IJ4cS 60 <LLD <LLD <LLD 0
_60 <LLD<LLD _ 0
___<LLD Tritium (3) 1000 <LLD <LLD <LLD 0 Mean and Range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parentheses. (f)
LLD values from Table E-2. See page E-8, "SENSITIVITY OF THE REMP MEASUREMENT PROCESS", for information on determining LLD and Minimum Detectable Activity (MDA).
Rancho Seco Nuclear Station 13 2002 AREOR
TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL
SUMMARY
Name of Facility Rancho Seco Nuclear Station Docket No. DPR-54/ SNM 2510 Location of Facility Sacramento. California Reporting Period January - December 2002 (County, State)
Medium or Type and Lower All Indicator Location with Highest Annual Control locations Number of Pathway Total Limit of Locations Mean Mean (f) a Nonroutine Sampled Number of Detection Mean (f)a Name Mean (f) a j Reported (Unit of Analysis (LLD) b Range Measurements Measurement) Performed & Direction Soil Discharge Canal y-spec (pCi/kg) 60 (8) bCo 150 NA 0 cs 15131 (7/8) RSLO.7NO 186 (2/2) 1__ (42-266) 0.7 miles 2700 (105-266) NA 0 134cS 150 <LLD <LLD NA 0 Soil y-spec
_ _ Storm Drain
_ _ _ _ _ _ _ _ _ _ (30)
_ _ _ _ 150 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ = _ _ _
(pCi/kg) 6 buco 150 NA 0
]ot Cs 150 43 (19/30) RSLO.2KO 97 (2/2) 14(16-102) 0.2 miles 2020 (92-102) NA 0
'Cs_150 <LLD <LLDNA 0
- 4Mn 150 7 (1/30) RSLO.3NP2 7 (1/2)
(7-7) 0.3 miles 2700 (7-7) NA 0 Mean and Range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parentheses. (f) b LLD values from Table E-2. See page E-8, "SENSITIVITY OF THE REMP MEASUREMENT PROCESS", for information on determining LLD and Minimum Detectable Activity (MDA).
Rancho Seco Nuclear Station 14 2002 AREOR
I I - - -, -- I- I-LI I I I II TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL
SUMMARY
Name of Facility Rancho Seco Nuclear Station Docket No. DPR-54/ SNM 2510 Location of Facility Sacramento, California Reporting Period January - December 2002 (County, State)
Medium or Type and Lower All Indicator Location with Highest Annual Control locations Number of Pathway Total Limit of Locations Mean Mean (f) a Nonroutine Sampled Number of Detection Mean (f)a Name Mean (f) a Range Reported (Unit of Analysis (LLD) b Range Distance Range Measurements Measurement) Performed & Direction Soil Depression Area y-spec (pCi/kg) (14) uco 150 470 (6/14) RSLO.4MP1 890 (2/2)
(86-1102) 0.4 miles 2480 (677-1102) NA 0
';'Cs 150 9929 (13/14) RSLO.4MP1 39335 (2/2)
(42-48150) 0.4 miles 2480(30520-48150) NA 0 Z54cs 150 119 (2/14) RSLO.4MP1 177(1/2) NA 0 (60-177) 0.4 miles 248°(177)
Sediment y-spec (pCi/kg) (24)
D°Co 150 21 (3/24) RMSO.6MO 18 (8/8) NA 0
.s(8-35) 0.6 miles 2480 (10-26)
Cs 150 111 (24/24) RMSO.6MO 130 (8/8)
(24-604) 0.6 miles 2480 (73-185) NA 0 134cs 150 <LLD <LLD NA 0 Mean and Range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parentheses. (f) b LLD values from Table E-2. See page E-8, "SENSITIVITY OF THE REMP MEASUREMENT PROCESS", for information on determining LLD and Minimum Detectable Activity (MDA).
Rancho Seco Nuclear Station 15 2002 AREOR
TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL
SUMMARY
Name of Facility Rancho Seco Nuclear Station Docket No. DPR-54/ SNM 2510 Location of Facility Sacramento. California Reporting Period January - December 2002 (County, State)
Medium or Type and Lower All Indicator Location with Highest Annual Control locations Number of Pathway Total Limit of Locations Mean Mean (f) a Nonroutine Sampled Number of Detection Mean (f)a Name Mean (f) Range Reported (Unit of Analysis (LLD)b Range Distance Range Measurements Measurement) Performed & Direction Fish (pCi/kg) y-spec (2) 130_<LD_<LDNA Mn 130 <LLD <LLD NA 0 bUCO 130 <LLD <LLD NA 0
_bbZn 260 <LLD <LLD NA 0 13Cs 130 47 (2/2) RFS0.6MO 47 (2/2)
__ _4cS _(39-55) 0.6 miles 2480 (39-55) NA 0
'bC130 <LLD <LLD NA 0 Algae y-spec (pCi/kg) (1_1)
O'Co 150
<LLD <LLD NA 0 13/Cs 150 22 (9/11) RAGO.6MO 58 (1/1) 134c (7-58) 0.6 miles 2700 (58-58) NA 0 s150 <LLD<LLD _ _ __NA 0 Mean and Range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parentheses. (f) b LLD values from Table E-2. See page E-8, "SENSITIVITY OF THE REMP MEASUREMENT PROCESS", for information on determining LLD and Minimum Detectable Activity (MDA).
Rancho Seco Nuclear Station 16 2002 AREOR
TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL
SUMMARY
Name of Facility Rancho Seco Nuclear Station Docket No. DPR-54/ SNM 2510 Location of Facility Sacramento. California Reporting Period January - December 2002 (County, State)
Medium or Type and Lower All Indicator Location with Highest Annual Control locations Number of Pathway Total Limit of Locations Mean Mean (f) a Nonroutine Sampled Number of Detection Mean (f)Name Mean (f) Range Reported (Unit of Analysis (LLD) b Range Distance Range Measurements Measurement) Performed & Direction Well Water Gross 34 3.2 (25-34) RWWO.7RP 4.39 (2/2) 2.9 (3/4) 0 (pCi/L) (34) (1.9-4.4) 0.7 miles 3380 (4.39-4.39) (2.3-3.3)
Tritium 1000 <LLD <LLD <LLD 0 (35) y-spec
<35)
Mn 15 <LLD <LLD <LLD 0 bb Zn 30 <LLD <LLD <LLD 0 Cs 10 <LLD <LLD <LLD 0 Runoff Water Mn~
Tritium 15 2000 1475<LLD (8/34) RRWO.6MO<LLD 1475 (8/34) NAL NA 0 0
(pCV/L) (34) (287-2280) 0.6 miles 2480 (287-220 y-spec (34) b4 Mn 15 <LLD <LLD NA 0 1JCo 15 <LLD <LLD NA 0 6b Zn 30 <LLD <LLD NA 0 1'J4Cs 18 <LLD <LLD NA 0
"'Cs 15 <LLD <LLD NA 0 a Mean and Range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parentheses. (f) b LLD values from Table E-2. See page E-8, "SENSITIVITY OF THE REMP MEASUREMENT PROCESS", for information on determining LLD and Minimum Detectable Activity (MDA).
Rancho Seco Nuclear Station 17 2002 AREOR
TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL
SUMMARY
Name of Facility Rancho Seco Nuclear Station Docket No. DPR-54/ SNM 2510 Location of Facility Sacramento. California Reporting Period January - December 2002 (County, State)
Medium or Type and Lower All Indicator Location with Highest Annual Control locations Number of Pathway Total Limit of Locations Mean Mean (f) Nonroutine Sampled Number of Detection Mean (f) Name Mean (f)Range Reported (Unit of Analysis (LLD) b Range Distance Range Measurements Measurement) Performed & Direction Surface Water Tritium 2000 889 (24/40) RSW1.8NO 1136 (6/15) <LLD 0 (pCi/L) (64) (210-2950) 1.8 miles 2700 (256-2340) y-spec (64) b4Mn 15 <LLD <LLD <LLD 0 bUCo 15 <LLD <LLD <LLD 0
_ Zn
_ 30 <LLD <LLD <LLD 0 1__Cs 1_8 <LLD <LLD <LLD 0 134cs 15 <LLD <LLD <LLD 0 Drinking Water Grossf3 4 3.7 (19/21) RDW0.1GO 3.8 (11/12) 3.3 (12/12) 0 (pCi/L) (34) (2.3-7.4) 0.1 miles 1350 (2.3-7.4) (2.6-4.4)
Tritium 1000 <LLD <LLD <LLD 0 (34) y-s~pec b4 Mn 15 <LLD <LLD <LLD 0 b 15 <LLD <LLD <LLD 0 Zn 30 <LLD <LLD <LLD 0 13c 10 <LLD <LLD <LLD 0 134Cs10 <LLD <LLD <LLD 0 Mean and Range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parentheses. (f) b LLD values from Table E-2. See page E-8, "SENSITIVITY OF THE REMP MEASUREMENT PROCESS", for information on determining LLD and Minimum Detectable Activity (MDA).
Rancho Seco Nuclear Station 18 2002 AREOR
I -
TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL
SUMMARY
Name of Facility Rancho Seco Nuclear Station Docket No. DPR-54/ SNM 2510 Location of Facility Sacramento, California _ Reporting Period January - December 2002 (County, State)
Medium or Type and Lower All Indicator Location with Highest Annual Control locations Number of Pathway Total Limit of Locations Mean Mean (f) a Nonroutine Sampled Number of Detection Mean (f)a Name Mean (f)a Range Reported (Unit of Analysis (LLD) b Range Distance Range Measurements Measurement) Performed & Direction Rain Water Tritium 2000 <LLD <LLD NA 0 (pCi/L) (12) y-spec
____5 12
________0 05Mn 15 <LLD <LLD NA 0
________bCo 15 <LLD <LLD NA 0
__ Zn 30 <LLD <LLD NA 0
____Cs 18 <LLD <LLD NA 0
_____ 15 <LLD <LLD NA 0 Mean and Range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parentheses. (f)
LLD values from Table E-2. See page E-8, "SENSITIVITY OF THE REMP MEASUREMENT PROCESS", for information on determining LLD and Minimum Detectable Activity (MDA).
Rancho Seco Nuclear Station 19 2002 AREOR
V. REFERENCES CFRa Code of Federal Regulations, 2002, "National Primary Drinking Water Regulations," Title 40, Part 141.
CFRb Code of Federal Regulations, 2002, "Standards for Protection Against Radiation," Title 10, Part 20.
CFRc Code of Federal Regulations, 2002, "Domestic Licensing of Production and Utilization Facilities," Title 10, Part 50.
CFRd Code of Federal Regulations, 2002, "Environmental Radiation Protection Standards for Nuclear Power Operations," Title 40, Part 190.
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).
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 10 CFR Part 50, Appendix I," Regulatory Guide 1.109, Revision 1.
NRC79a United States Nuclear Regulatory Commission, 1979, "An Acceptable Radiological Environmental Monitoring Program," Branch Technical Position, Revision 1.
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 (40 CFR Part 190)," NUREG-0543.
RS01 Rancho Seco Nuclear Station, 2002, "Annual Radioactive Effluent Release Report, January -December 2002," Sacramento Municipal Utility District report.
RS02 Rancho Seco Quality Control Manual, Appendix A Rancho Seco Nuclear Station 20 2002 AREOR
VI. APPENDICES Rancho Seco Nuclear Station 21 2002 AREOR
APPENDIX A 2001/2002 LAND USE CENSUS RESULTS In compliance with the Rancho Seco Quality Manual [RS02] and the REMP Manual, section 4.0, "Land Use Census", a land use census was completed on March 25, 2003. The method of conducting the primary survey was to use an aerial survey that was conducted during June 2002. Evaluating the aerial photographs continues to provide an accurate method of determining locations and distances of the nearest residences. The aerial photos also provided a method to identify any changes in the agricultural, commercial, residential, or industrial use of the land surrounding the site. 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 two-mile radius from the Reactor Building.
The 2001/ 2002 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 10 CFR Part 50, Appendix I, section IV.B.3.
The Land Use Census is completed on a biennial schedule. Aerial surveys will be conducted during 2004 and the Galt Irrigation report covering 2003 and 2004 will be requested during the last quarter of 2004. This information will be used to complete the 2003/ 2004 census, which is scheduled to be completed in 2005.
Rancho Seco Nuclear Station A-1 2002 AREOR
A. RESIDENT EXPOSURE PATHWAY
SUMMARY
Inhalation, Ground Plane and Water Consumption The 2001/ 2002 census determined that seven of the 16 radial sectors have residences that are within the 2-mile (3219 meters) Land Use Census radius. The closest residence in each of the seven sectors is identified below:
Sector Distance Ranking (meters) (Nearest to Farthest)
A >3219 NA B >3219 NA C 1432 3 D 1175 1 E >3219 NA F >3219 NA G 2381 6 H >3219 NA J >3219 NA K 2320 5 L 1207 2 M 2028 4 N 3181 7 P >3219 NA Q >3219 NA R >3219 NA It is expected that all seven residences use well water for consumption and other domestic purposes.
Rancho Seco Nuclear Station A-2 2002 AREOR
B. DEPOSITION EXPOSURE PATHWAY
SUMMARY
Beef Consumption Based on conservative dose calculation parameters in use, the following is a summary for the 2001/ 2002 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 531 Beef Unrestricted Area Boundary D 451 Beef Unrestricted Area Boundary E 483 Beef Unrestricted Area Boundary F 499 Beef Unrestricted Area Boundary G 579 Beef Unrestricted Area Boundary H 198 Beef Unrestricted Area Boundary J 195 Beef Unrestricted Area Boundary K 195 Beef Unrestricted Area Boundary L 286 Beef Unrestricted Area Boundary M 404 Beef Unrestricted Area Boundary N 514 Beef Unrestricted Area Boundary P 708 Beef Unrestricted Area Boundary Q 579 Beef Unrestricted Area Boundary R 448 Beef Unrestricted Area Boundary Due to the revision of the ODCM, which eliminated the gaseous effluent pathway (August 26, 2002), the Deposition Exposure Pathway is not considered a credible evaluation with current plant conditions. Land Use Census use of this evaluation will be considered for revision in future surveillances.
Rancho Seco Nuclear Station A-3 2002 AREOR
C. IRRIGATED CROP EXPOSURE PATHWAY
SUMMARY
Laguna Creek Gait Irrigation District The Galt Irrigation District's 2001 Crop Report stated 3119.594 acre-feet of Laguna Creek water was diverted for irrigation purposes during the 2001 crop production season. Crops irrigated were sudan, clover, pasture, corn, and alfalfa over a total of 986 acres.
The Galt Irrigation District's 2002 Crop Report stated 2845.869 acre-feet of Laguna Creek water was diverted for irrigation purposes during the 2002 crop production season. Crops irrigated were corn, rice, clover, pasture sudan and alfalfa over a total of 1021 acres.
Rossini Farming Company In addition to the above, SMUD has contracted with Rossini Farming Co., the owners of the vineyards adjacent to Rancho Seco Station, to supply irrigation water from Clay Creek on an as needed basis.
The following information was reported by the Rancho Seco Quality Group, which monitors the usage. From November 1, 2001 to April 30, 2002 a total of 74.548 Acre-feet of water was used from the effluent creek for irrigating purposes for the vineyards.
Rancho Seco Nuclear Station A-4 2002 AREOR
D. OTHER EXPOSURE PATHWAYS The 2001/2002 Land Use Census confirmed previous knowledge that the Clay/ Laguna Creeks are utilized by the general public for aquatic life consumption purposes. Based on direct observation cattle consume water from the Clay, Hadselville, and Laguna Creeks.
Past census evaluations have been unsuccessful in determining the usage/ occupancy factors for this consumption. Therefore, insufficient data existed to justify ODCM usage factor modification.
E. REMP EVALUATION An objective of the 2001/ 2002 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 Luxel dosimetry, air, and soil sampling and analysis. Well water was monitored at nine locations.
Since the existing REMP was more conservative with respect to Resident Exposure Pathway monitoring, no changes were required.
Deposition Exposure Pathway The Deposition Exposure Pathway is monitored directly within the Station Site Boundary through garden vegetation sampling and analysis. 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. Since the current REMP was representative and conservative with respect to Deposition Exposure Pathway monitoring, no changes were required.
Irrigated Crop Exposure Pathway The REMP was effective in monitoring the identified irrigated crop exposure pathways. This conclusion was because the REMP included irrigated vegetation sampling. The commercial grape vineyards are being evaluated and a sample program has been established as the vineyards reached maturity.
REMP surface water surveillance activities monitor irrigation water radiological quality.
Current ODCM calculations are conservative since dilution effects are not included when predicting potential dose delivered through downstream pathways.
Rancho Seco Nuclear Station A-5 2002 AREOR
E. REMP EVALUATION (continued)
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 Lake. With respect to availability and quantity of food sources, the other identified consumption activities were considered inconsequential for pathway monitoring purposes.
No REMP changes were required to monitor other exposure pathways.
F. ODCM EVALUATION Based on 2001/2002 Land Use Census findings, the following potential exposure pathways exist at the indicated locations:
GASEOUS EFFLUENT (removed by revision to ODCM in 2002)
Exposure Pathway Location Comment Inhalation 1175m ENE Resident location having the highest dispersion parameter Ground Plane 1175m ENE Resident location having the highest deposition parameter LIQUID EFFLUENT Exposure Pathway Location Comment Freshwater Fish Clay Creek Recreation beyond the Site Boundary Swimming Clay Creek Recreation beyond the Site Boundary Shoreline Deposits Clay Creek Recreation beyond the Site Boundary Irrigated vegetation Clay Creek Commercial vineyards and potential residences beyond the site boundary Irrigated forage Clay Creek Cattle grazing beyond the Site Boundary Drinking Water Clay Creek Cattle drinking water beyond the Site Boundary Rancho Seco Nuclear Station A-6 2002 AREOR
F. ODCM EVALUATION (continued)
The GASEOUS EFFLUENT locations for inhalation and ground plane used by the ODCM are conservative since they are located at the Station Site Boundary. Future use of this pathway will be removed due to the revision to the ODCM.
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 2001/ 2002 Land Use Census the above information for exposure pathways and locations was submitted for incorporation in the ODCM for use during 2003 and 2004.
Rancho Seco Nuclear Station A-7 2002 AREOR