ML050590117
| ML050590117 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 02/17/2005 |
| From: | Donna Anderson, Cooper W, Packer J, Pillsbury G, Tozzie R Maine Yankee Atomic Power Co |
| To: | Document Control Desk, NRC/FSME |
| References | |
| FR-2900-01, Rev 0 | |
| Download: ML050590117 (46) | |
Text
MAINE YANKEE FINAL STATUS SURVEY RELEASE RECORD FR-2900 ROADS/RAILROAD SURVEY UNIT 1 Prepared By: p o A. Date: I/Os FSS Engineer - Signature a Adb E.SJ Printed Name Reviewed By: Date: alj /oS0 FSS S 2i.UIlgnature Printed Name Reviewed By: , Date: 7. /0 / 5 Independent Review - Signature Approved By: _ f EDate: Zla:5Sq
,p r nt nde M j-,Sign i ature Printed Name Approved By: f Date:________
FSS, OP - Signature Printed Name Revision 0
MAINE YANKEE FINAL STATUS SURVEY RELEASE RECORD FR-2900 ROADS/RAILROAD SURVEY UNIT I A. SURVEY UNIT DESCRIPTION Survey Unit FR-2900-01 consisted of the East Plant Access Road and adjoining parking lots located along the Back River. The road extended from site coordinates 408,OOON and 624,500E to 409,750N and 625,250E using the Maine State Coordinate System (West Zone)
NAD 1927, as shown on Map FR 2900 SITE (Attachment 1).
The East Access Road served as the primary access and egress route during Maine Yankee's operating history and for a portion of the decommissioning activities. As a result, radioactive materials were routinely transferred along the route. The 8,878 m2 survey design area encompassed the following lands:
- Road surfaces extending from the former Information Center footprint to Old Ferry Road
- Information Center parking area
- Overflow parking lot B adjacent to the East Plant Access Road D Access road to the Maine Yankee boat ramp
- Parking lots adjacent to Bailey Barn.
The majority of surfaces within Survey Unit I consisted of sub-asphalt soil. However, 356 m2 of asphalt remained where the Plant Access road joined Old Ferry Road. The survey area was located entirely outside the Restricted Area and is illustrated in more detail on Map FR 2900-1 (Attachment 1). The design area of 8,878 m2 was used to determine the locations of direct point measurements. Due to a Maine Yankee commitment, gamma scans were performed on the road footprint and 1 meter on both sides of the roadway. This 1-meter border on both roadway edges was not included in the original survey design area calculation. As a result, an additional 1,160 m2 of soils received gamma scans outside of the original survey design.
FR-2900-01, Revision 0 Page 2 of 46
B. SURVEY UNIT DESIGN INFORMATION The survey unit was designated a Class 3 land survey per the LTP (Table 5-1 C). The survey unit design parameters for FR-2900 as a Class 3 survey are shown in Table 1. Given a relative shift of 3.0, it was determined that 14 direct measurements were required for the Sign Test. Measurement locations were randomly determined and are illustrated on Map FR 2900-1 SU/DP (Attachment 1). Direct measurements (soil samples) were collected from the required locations and analyzed with laboratory gamma spectroscopy instrumentation.
Because the roadway had served as the principal pathway for radioactive materials routinely entering and leaving site, gamma scans were performed over 100% of the road footprint and 1 meter on either side using either E-600/SPA-3 or in sitit gamma spectroscopy (ISOCS) instrumentation. Proximity to the Independent Spent Fuel Storage Installation (ISFSI) determined the choice of instrumentation, as high backgrounds prohibited the use of E-600/SPA-3 instruments on that portion of road adjacent to the ISFSI berm. In addition to the road footprint, scans were also performed in a 2 meter perimeter around the parking lots adjacent to the Bailey Barn (Sections I and J) and a portion of the driveway into the former Information Center parking lot (Section N) at a water runoff location. To facilitate data handling due to the size of the area, the survey unit was segregated into the sections delineated on Map FR 2900-1 Areas (Attachment 1).
For those portions of the road scanned with E-600/SPA-3 instrumentation, 2 by 3 meter grids were established by dividing the road width plus 1 meter on either side (9.25-meter total width) into 3 equal size lanes. The lanes were then subdivided into 2 meter lengths, creating grids of approximately 6.2 in2 . To match the road design, 2-meter wide perimeters were established around the Section I and J parking lots. The perimeters were further subdivided into 5-meter lengths. At the former Information Center driveway, a 45-meter stretch along the water runoff area on the access ramp was also divided into 2 by 5 meter grids for scanning purposes. Configuration of the scans are illustrated on the applicable maps listed in Table IA and provided in Attachment 1.
Road sections scanned with ISOCS detectors (Sections D, E, F, G and the asphalt portion of A) used overlapping 28 m2 fields of view to obtain the 100% scan coverage. The ISOCS detector was positioned perpendicular to the surface at a 3-meter distance, using a 90-degree collimator. Configuration of the scans are also provided on applicable maps as given in Table 1A and included in Attachment 1. Because the perimeter of the boat access road in Section K and the "B" parking lot in Sections L and M were surveyed previously under FR-I 800, Bailey House Land Area, scans were not performed in these sections.
A total of 5,805 rn2 was scanned during the performance of this survey, exceeding the 1% to 10% requirements for a Class 3 area. The road scans included soils I meter on either side although the original design estimate did not account for those zones. The survey instruments used are listed by model and serial number in Attachment 2 (Table 2-1). Scan MDCs are also listed in Attachment 2 (Table 2-2) and are compared to the DCGL and the investigation level.
FR-2900-01, Revision 0 Page 3 of 46
For the areas scanned with E-600/SPA-3 instrumentation, background values were based on local scaler values in the survey unit. These background values were used to establish scan alarm setpoints, and to confirm the scan MDCs used were appropriate.
TABLE IA Section Scan Grid Size Medium Instruments Map Used A 28 m2 field of view asphalt ISOCS FR2900-1 SS AA A 2 m by 3 m sub-asphalt soil E-600/SPA-3 FR2900-1 SS A B 2 m by 3 m sub-asphalt soil E-600/SPA-3 FR2900-1 SS B B 2 m by 3 m sub-asphalt soil E-600/SPA-3 FR2900-1 SS C B 2 m by 5 m (perimeter) sub-asphalt soil E-600/SPA-3 FR2900-1 SS J C 2 by 3 sub-asphalt soil E-600/SPA-3 FR2900-1 SS C D 28 m field of view sub-asphalt soil ISOCS FR2900-1 SS D E 28 m2 field of view sub-asphalt soil ISOCS FR2900-1 SS E F 28 mZ field of view sub-asphalt soil ISOCS FR2900-1 SS F G 28 ml field of view sub-asphalt soil ISOCS FR2900-1 SS G H 2 m by 3 m sub-asphalt soil E-600/SPA-3 FR2900-1 SS H I 2 m by 5 m (perimeter) sub-asphalt soil E-600/SPA-3 FR2900-1 SS 1 J 2 m by 5 m (perimeter) sub-asphalt soil E-600/SPA-3 FR2900-1 SS J mby 3 m sub-asphalt soil E-600/SPA-3 FR2900-1 SS B K N/A sub-asphalt soil N/A FR2900-1 SS K L N/A sub-asphalt soil N/A FR2900-1 SS L M N/A sub-asphalt soil N/A FR2900-1 SS M
( 2m by 5 m sub-asphalt soil E-600/SPA-3 FR2900-1 SS N I (portion of perimeter) IIII FR-2900-01, Revision 0 Page 4 of 46
TABLE I SURVEY UNIT DESIGN PARAMETERS Survey Unit Design Criteria Basis Area 8,878 m2 No limit for Class 3, based on
___ ___ ____ ___ ___ ___ ___ ___ ___ L T P T able 5-2 Based on adjusted LBGR of 3.5 Number of Direct 14 pCi/g, sigma' of 0.23 pCi/g and Measurements Required a relative shift of 3.0.
Type I = Type 11 = 0.05 Sample Area N/A Class 3 Area Sample Grid Spacing N/A Class 3 Area 6 mW - 10 m2 grids for Scan Grid Area E-600/SPA-3; See Section B ISOCS scan at 3-meters Area Factor N/A Class 3 Area Scan Area 5,805 m2 Class 3 Area-1% to 10%
___ __________ __ ___ ___ ____ ___ ___ ___ (L T P T able 5-3)
Background ' ____,___,- * -- i 11,107 cpm Sections A, B-I, I 11,822 cpm Section B-2 12,627 cpm Section B-3 13,671 cpm Section C-1 14,623 cpm Section C-2 15,629 cpm Section C-3 13,300 cpm Section H-1 SPA-3 (Scan) 14,300 cpm Section H-2 13,700 cpm Section H-3 12,500 cpm Section H-4 12,900 cpm Section H-5 13,600 cpm Section H-6 12,600 cpm Section H-7 11,457 cpm Section J 12,567 cpm Section N Scan Investigation Level 3 Sigma of Background See Table 2-2, Attachment 2 (E-600/SPA-3) plus Background (Reference 7)
Scan Investigation Level ISOCS investigation level with (ISOCS) 1.0 pCi/g Cs-137 detector at 3-meter height (Reference 6)
DCGL 4.2 pCi/g Cs-137 LTP, Rev. 3, Section 6.7 Design DCGLEc I N/A Class 3 Area LTP Revision 3, Table 5-1C for Bailey House Land Area, RI 800 FR-2900-01, Revision 0 Page 5 of 46
C. SURVEY RESULTS As required, 14 direct soil measurements were performed in Survey Unit I and the results are presented in Table 2. All direct measurements were below the DCGL.
ISOCS gamma scans were performed at 283 locations using an investigation level of 1.0 pCi/g Cs-137. The gamma scans were performed for a sufficient count time to achieve a typical Minimum Detectable Activity (MDA) of approximately 10% of the DCGL. All scan activity levels were below the MDAs which were below the prescribed investigation level.
Therefore, no investigations were required in those areas where ISOCS scans were performed.
A total of 410 grids were scanned using E-600/SPA-3 instrumentation. Only 32 verified scan alarms were received, which equates to less than 8% of all grids scanned. The investigation of verified alarms is discussed in Section D.
TABLE 2 DIRECT MEASUREMENTS Sample Location Cs-137 (pCi/g) Uncertainty (pCi/g)
FR2900-1-3SOOlSS < 4.12E-02 FR2900-1-3S002SS < 4.78E-02 FR2900-1-3S003SS 5.26E-02 3.06E-02 FR2900-1-3SO04SS < 4.52E-02 FR2900-1-3S005SS < 4.68E-02 FR2900-1-3SO06SS < 5.34E-02 FR2900-1-3SO07SS < 4.58E-02 FR2900-1-3SO08SS < 4.72E-02 FR2900-1-3SO09SS < 4.36E-02 FR2900-1-3SOIOSS < 4.71E-02 FR2900-1-3SOIISS < 4.67E-02 FR2900-1-3SO12SS < 4.61E-02_
FR2900-1-3SO13SS < 4.82E-02 FR2900-1-3SO14SS < 4.26E-02 Sample Mean 4.67E-02 Median 4.68E-02 Standard Deviation 3.32E-03 Sample Range 4.12E 5.34E-02
"<" indicates MDA value. Bold indicates positive detection value.
Samples were also analyzed for Co-60. All were less than MDA.
FR-2900-01, Revision 0 Page 6 of 46
D. SURVEY UNIT INVESTIGATIONS PERFORMED AND RESULTS Soil scans performed with the E-600/SPA-3 during initial surveys identified 32 scanned grids with vcrified alarms. An investigation package was written to perform additional scans within the identified grids, mark and log each verified alarm and collect a soil sample at the highest verified alarm location. Locations of grids requiring investigation scans are illustrated on the applicable maps as provided in Table 3. As a result of the investigation, a total of 32 soil samples were collected. Results of the soil samples are presented in Attachment 3-1 (Attachment 3). All soil sample results were below the DCGL.
The investigation was conducted via survey investigation package XR2900-01.
TABLE 3 XR-2900 INVESTIGATION SURVEY MAPS Section Investigated Grids Total Area in m2 Map A S003 6.2 XR2900-1 SS A B-1 S106, S107, S109, S110, S111, 49.6 XR2900-1 SS B
_______ SI 12, SI115, SI118, _ _ _ _ _ _ _ _ _
B-3 S189, S192, S195, S198, S201 31.0 C-I S225, S231, S237, S240, S243, 55.8 XR 2900-1 SS C
___ ___ S246, S249, S252,S5255 _ _ _ _ _ _ _ _ _ _
C-2 S259, S265, S268, S273, S276 31.0 S237, S240, S243, S246, S249, 43.4 XR2900-1 SS Cla
____ __ 252, S255 _ _ _ _ _ _ _ _ _ _
H-5 S319, S340 12.4 XR2900-1 SS H J S168,S171 12.4 XR2900-1 SS J Total Investigated Area 198.4 m2 ___ _
E. SURVEY UNIT DATA ASSESSMENT An analysis of the direct sample measurement results, including the mean, median, standard deviation, and sample result range, is provided in Table 2. Of the 14 soil samples collected, only one sample identified Cs-137 activity, with the reported value less than 2% of the DCGL. All other values were below the MDA. The identified sample activity and Minimum Detectable Activities are listed in Table 2. The mean and median activities for Cs-137 were also less than the DCGL. In addition, Co-60 was not identified in any of the 14 samples.
2 The seven grids inSection Cla were initially investigated usingthe Section C-l alarm setpoints.
Background was re-assessed and a new alarm setpoint (18,200 cpm) determined for these grids. The seven grids were then surveyed as Section C-la. As such,,the grids given as Section C-la appear in both Section C-I and C-la in the above table.
FR-2900-01, Revision 0 Page 7 of 46
For illustrative purposes, as indicated in LTP Section 5.9.3, a simplified general retrospective dose estimate can be calculated from the average residual contamination level by subtracting the mean fallout Cs-137 value (0.19 pCi/g) 3 for disturbed soil from the survey unit sample mean activity (0.0467 pCi/g). The net result is negative and would equate to an annual dose rate of 0.0 mrem/year. However, for purposes of demonstrating compliance with the radiological criteria for license termination and the enhanced State criteria, background activity was not subtracted from the soil sample analysis activity values.
F. ADDITIONAL DATA EVALUATION Attachment 4 provides additional data evaluation associated with this Survey Unit, including relevant statistical information. Based on survey unit direct measurement data, this attachment provides the Sign Test Summary, Quantile Plot, Histogram, and Retrospective Power Curve.
- 1. The Sign Test Summary provides an overall summary of design input (Table 1) and resulting calculated values used to determine the required number (N) of direct measurements (per LTP Section 5.4.2). The Sign Test Summary is a separate statistical analysis that also calculates the mean, median, and standard deviation of the direct measurements.
The critical value and the result of the Sign Test are provided in the Sign Test Summary table, as well as a listing of the key release criteria. As is shown in the table, all of the key release criteria were clearly satisfied for the FSS of this survey unit. The sample standard deviation is smaller than the design sigma; therefore no additional samples were required.
- 2. The Quantile Plot was generated from the direct measurement data listed in Table 2. The data set and plot are consistent with expectations for a Class 3 survey unit. All of the measurements are well below the DCGL of 4.20 pCi/g for land outside the restricted area.
- 3. A Histogram Plot was also developed based on the direct measurement data values. This plot shows a normal distribution.
- 4. A Retrospective Power Curve was constructed, based on FSS results. The curve shows that this survey unit having a mean residual activity at a small fraction of the DCGL has a high probability ("power") of meeting the release criteria. Thus, it can be concluded that the direct measurement data support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and that the data quality objectives were met.
3 See Attachment E to Maine Yankee Procedure PMP 6.7.8 (Reference 5).
FR-2900-0 1,Revision 0 Page 8 of 46
G. CHANGES IN INITIAL SURVEY UNIT ASSUMPTIONS ON EXTENT OF RESIDUAL ACTIVITY The survey was designed as a Class 3 land survey area; the FSS results were consistent with that classification. The direct measurement sample standard deviation wvas less than the design sigma. Thus, a sufficient number of sample measurements were taken and no additional measurements were required.
II. LTP CHANGES SUBSEQUENT TO SURVEY UNIT FSS The FSS of Survey Unit 1 was designed, performed and evaluated in the July/September 2004 time frame. The design was performed to the criteria of the LTP Revision 3 (References 2 and 4). Maine Yankee LTP Change No.05-001 modified the Table 6-1 1 "Contaminated Material DCGL" to reflect an increased Deep Soil DCGL of 0.86 pCi/g for Co-60 for soil in the RA. Because FR-2900 Survey Unit 1 is located outside the RA, this LTP change did not impact the outcome of final survey results within this survey area. No subsequent LTP changes with potential impact to this survey unit need to be evaluated.
I. CONCLUSION The FSS of this survey unit was designed based on the LTP designation as a Class 3 area.
The survey design parameters are presented in Table 1. The required number of direct measurements was determined for the Sign Test in accordance with the LTP. As presented in Table 2, all direct measurements were less than the DCGL of 4.2 pCi/g Cs-137.
A Sign Test Summary analysis demonstrated that the Sign Test criteria were satisfied. The direct measurement sigma wvas determined to be less than that used for design, thus indicating that a sufficient number of samples was taken.
The Retrospective Power Curve shown in Attachment 4 confirmed that sufficient samples were taken to support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and the data quality objectives were met. Attachment 4 also revealed that direct measurement data represented essentially a normal distribution.
The scan survey design for this survey unit was developed in accordance with the LTP Revision 3 Addenda (References 2 and 4) with significant aspects of the design discussed in Section B and Table 1. ISOCS scans performed at a distance of 3 meters in a systematic grid pattern throughout the survey unit did not identify activity above the scan investigation level of 1.0 pCi/g Cs-1 37. Scans performed with E-600/SPA-3 instrumentation resulted in 32 verified alarms. An investigation was conducted via package XR 2900-01 and 32 additional soil samples were obtained. All soil sample results were less than the MDAs.
It is concluded that FR-2900 Survey Unit I meets the release criteria of IOCFR20.1402 and the State of Maine enhanced criteria.
FR-2900-O1, Revision 0 Page 9 of 46
J. REFERENCES
- 1. Maine Yankee License Termination Plan, Revision 3, October 15,2002 and Addenda provided by Maine Yankee letter to the NRC, MN-02-061, dated November 26, 2002
- 2. NRC letter to Maine Yankee, dated February 28, 2003
- 3. Maine Yankee letter to the NRC, MN-03-049, dated September II, 2003 (LTP Supplement to LTP Revision 3)
- 4. Issuance of License Amendment No. 170, NRC letter to Maine Yankee, dated February 18, 2004
- 5. Maine Yankee Procedure PMP 6.7.8, FSS Data Processing and Reporting, Attachment E, Approach for Dealing With Background Radioactivity for Maine Yankee Final Status Surveys
- 6. Maine Yankee Calculation No. EC-003-04 (MY), Use of In Situ Object Counting System (ISOCS) for FSS Surveys
- 7. Maine Yankee Calculation No. EC 009-01 (MY), Instrumentation Selection and MDC Calculation FR-2900-01, Revision 0 Page 10 of 46
Attachment 1 Survey Unit Maps FR-2900-0 1, Revision 0 Page II of 46
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_ ,Page 17 of46 along the CL of this section of road is approx. 52m
Maine Yankee M ID#: I-F 2uu-1 S' Imap Decommissioning Team Maine Yankee DecommissioningProjectSurvey Form Revised: 9128/04 Survey Type: 0 Characterzation l Turnover I Final Status Survey ISurvey Area Name: East PlantAccess Road and Lots Final Status Survey FR 2900: East Plant Access Road and Lots Survey Area "B" Survey Scans S079 - S183
__ Section B-1, Alarm Setpoint 13,600 cpm 9.25m EfSection B-2, Alarm Setpoint 14,300 cpm EjSection B-3, Alarm Setpoint 15,200 cpm ZoSection J, Alarm Setpoint 13,900 cpm lSection B-1I
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Maine Yankee Map ID #: FR 2900-1 SS C Decommissioning Team Maine Yankee DecommnissioningProjectSurvey Form Revised: 9V2804 Survey Type: 0 Characterization 0 Tumover M Final Status Survey lSurvey Area Name: East Plant Access Road and Lots Final Status Survey FR 2900: East Plant Access Road and Lots Survey Area "C" Survey Scans S184 - S276 lSection B>0 IcoC Section B-31
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Section Cay nSection B-3, Alarm Setpoint 15,200 cpm Section C- tZ Section C-1, Alarm Setpoint 16,400 cpm PectionC 0-3 Section C-2, Alarm Setpoint 17,400 cpm EESection C-3, Alarm Setpoint 18,500 cpm ion C R2900O-01, Revision 0 Page 19 of 46 Distance along the CL of this section of road isapprox. 62m
Maine Yankee I Map ID#:,FR 2900-1 S,1 Decommissioning Team Maine Yankee Decontmissioning Project Strvey Form IRevised 9Q8/04 Survey Type: 0 Characterization 0 Turnover M Final Status Survey ISurvey Area Name: East Plant Access Road and Lots Final Status Survey FR 2900: East Plant Access Road and Lots Survey Area "D" ISOCS Scans S411 - S478 & S684 - S693
-i ROAD 3.00m 3.00m 0 FR-2900-01, Revision 0 Page 20 of 46 CL ofh'section of road is approx. 93m
aine Yankee MI . . . . . Map ID #: FR 2900-1 SI Decommissioning Team IMieYne eomsinn rjc u'yFr Revised: 9128I04 Survey Type: 0 Characterization 0 Turnover H Final Status Survey iSurvey Area Name: East Plant Access Road and Lots Final Status Survey FR 2900: East Plant Access Road and Lots Survey Area "E" ISOCS Scans S479 - S535 I
I 3.00n FR-2900-01, Revision 0 Page 21 of 46 Distance along the CL of this section of road is approx.
Maine Yankee . . Map ID#: FR 2900-1 S:
Decommissioning Team IMaine Yankee DecommissioningProjectSurvey FormlRevised: 9/28I04 Survey Type: 0 Characterization E Turnover C Final Status Survey ISurvey Area Name: East Plant Access Road and Lots Final Status Survey FR 2900: East Plant Access Road and Lots Survey Area "F"ISOCS Scans S536 - S603
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Maine YanKee Map Lu: r.K ZVUU-1 I; Decommissioning Team iMaine Yankee DecommissioningProjectSurvey Form Revised: 9128/04 Survey Type: 0 Characterization E Turnover 3 Final Status Survey i Survey Area Name: East Plant Access Road and Lots Final Status Survey FR 2900: East Plant Access Road and Lots Survey Area "G" ISOCS Scans S604 - S653 I -- rs / I",/Y J
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Maine Yankee .Map ID#: FR 2900-1 SS Decommissioning Team Maine Yankee DecommissioningProjectSurvey Formn Revised: 9128104 Survey Type: 0 Characterization E Turnover B Final Status Survey Survey Area Name: East Plant Access Road and Lots Final Status Survey FR 2900: East Plant Access Road and Lots Survey Area "H" Survey Scans S277 - S366 74/ -w Ofi
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/ I II tMSection H-5, Alarm Setpoint 15,500 cpm/l E]Section H-6, Alarm Setpoint 16,300 cpm OSection H-7, Alarm Setpoint 15,200 cpm FR-2900-01, Revision 0 Page 24 of 46 Distance along the CL of this section of road is approx. 60m
Maine YanKee ma lii;: t-iN zUUU-i bb I Decommissioning Team IMaine Yankee DecommissioningProjectSurvey Form IRevised: 9/28/04 Survey Type: D Characterization 0 Turnover H Final Status Survey Survey Area Name: East Plant Access Road and Lots Final Status Survey FR 2900: East Plant Access Road and Lots Survey Area "I" Survey Scans S381 - S401 Section B-1, Alarm Setpoint 13,600
/ Section B-2, Alarm Setpoint 14,300 BAILEY BARN FR-2900-01, Revision 0 Page 25 of 46 Lot Grids are approx. 2m wide by 5m long.
Maine Yankee . .Map ID #: FR 29UU-1 8 Decommissioning Team Maine Yankee DecommissioningProject Survey Form IRevised: 9/28104 Survey Type: 0 Characterization C Turnover 1 Final Status Survey Survey Area Name: East Plant Access Road and Lots Final Status Survey FR 2900: East Plant Access Road and Lots Survey Area "J" Survey Scans S367 - S380
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BAILEY BARN Section B-3, Alarm Setpoint 15,200 cpm gSection J,Alarm Setpoint 13,900 cpm FR-2900-01, Revision 0 Page 26 of 46 Vy NOTE: Bailey Barn Lot Grids are approx. 2m wide by 5m long.
Maine Yankee Map ID#: FR 2900-1 SS K Decommissioning Team Maine Yankee DecomnmissioningProjectSurvey Form Revised: 9/28I04 Survey Type: 0 Characterization 0 Turnover X Final Status Survey lSurvey Area Name: East Plant Access Road and Lots Final Status Survey FR 2900: East Plant Access Road and Lots Survey Area "K" No Scans Chosen for this Map AX~ IkS.
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FR-2900-01, Revision 0 Page 27 of 46
Maine Yankee Map ID#: FIR 2900-1 SS L Decommissioning Team IMaine YankeeDecomnmissioningProjectSurvj Formt Revised: 9/28/04 Survey Type: O Characterization O Turnover WFinal Status Survey ISurvey Area Name: East Plant Access Road and Lots Final Status Survey FR 2900: East Plant Access Road and Lots Survey Area "L" No Scans Chosen for this Map NI of 46
Decommissioning Team lMaine Yankee DecommissioningProjectSurvey Form IRevised: 9/28104 Survey Type: 0 Characterization C Turnover H Final Status Survey Survey Area Name: East Plant Access Road and Lots Final Status Survey FR 2900: East Plant Access Road and Lots Survey Area "M" No Scans Chosen for this Map 0-00 0
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Decommissioning Team IMaine YankeeDeconmmzissioningProjectSurvey FormtllRevised*918104 Survey Type: 0 Characterization 0 Turnover 3 Final Status Survey Survey Area Name: East Plant Access Road and Lots Final Status Survey FR 2900: East Plant Access Road and Lots Survey Area "N" Survey Scans S402 - S41 0 I -I I I ' A )
ccD cpm
/I
/
/'
/
FR-2900-01, Revision 0 Page 30 of 46
Maine Yankee IMap ID #: XR 2900-1 SS A Decommissioning Team Maine Yankee DecomntissioningProjectSurvey Formn Revised: 9/28104 Survey Type: O Characterization O Turnover X Final Status Survey Survey Area Name: East Plant Access Road and Lots Investigation Survey XR 2900: East Plant Access Road and Lots Survey Area A Alarm Grids Section A, Alarm Setpoint 13,600 cprb 00 ,1 -- ,oo°
~SO12O 311 9,25tY1 Soloi 9S019 -r- IS021J IS022 SO231SO24, +
IIS25sO26:SO2 I___---t 2.0m(Approx )
S0 7,S030'j IS031 S034 S033 fS0377503822 o 3]9 Section A2 S040 IS0411S04213
, S043,'So 4 4 1& 4 ,IS
-S40
-01, Revision 0
'ge31 of 46
,/ ,'Distance along the CL of this section offroad is approx. 52m
Maine Yankee Map ID #: XR 2900-1 SS B Decommissioning Team Maine Yankee DecommissioningProjectSurvey Form Revised: 9/28/04 Survey Type: l Characterization 0 Turnover N Final Status Survey ISurvey Area Name: East Plant Access Road and Lots Investigation Survey XR 2900: East Plant Access Road and Lots Survey Area B1 Alarm Grids lESection B-1, Alarm Setpoint 13,600 cpm (Approx.) .- ,.' z t~--/ "tre I
>K /Section B-11
- ,Yo -o292.02.Om (Approx.)
Xn I§Se~qriqB-2Sec lsection B- o J I
+'>9,<>-... s \ BAIllEY
/+"s'P>"sX<Pss8/ >BARN X, k l eci n I/ /
4
/./4~~ <FR-2900-01, Revision 0 Page 32 of 46 4 /
Distance along the C of this section of road is pprox. 70m CY
Maine Yankee Map ID #: XR 2900-1 SS C Decommissioning Team Maine Yankee DecommissioningProjectSuri'ey Form Revised: 9/2804 Survey Type: O Characterization 0 Turnover 0 Final Status Survey ISurvey Area Name: East Plant Access Road and Lots Investigation Survey XR 2900: East Plant Access Road and Lots Survey Area B3, C1, C2 Alarm Grids ISection B-3 1
16-a N / X ISectioCI K (Approx 'v),
Secon -3 Alarm Setpoint 15,200 cpm Csection C-1, Alarm Setpoint 16,400 cpm
/ Section C-2, Alarm Setpoint 17,400 CPM
/ ~/ 4'r/o
/R
/ ~FR-2900-01, Revision 0 Page 33 of 46
//
I Distance along the CL of this section of road is approx. 62m
Decommissioning Team Yankee DeconmmissioningProjectSurvey Form *t28104 9Revised:
Survey Type: E Characterization l Turnover N Final Status Survey iSurvey Area Name: East Plant Access Road and Lots Investigation Survey XR 2900: East Plant Access Road and Lots Survey Area Cla Alarm Grids lSection C-11 9.25m (A
E3j Section C-1a, Alarm Setpoint 18,200 cpm FR-2900-01, Revision 0 Page 34 of 46 Distance along the CL of this section of road is approx. 62m
Decommissioning Team IMaine Yankee DecommissioningProjectSurvey Form IRevised: 9/28104 Survey Type: 0 Characterizaton O Turnover X Final Status Survey ISurvey Area Name: East Plant Access Road and Lots Investigation Survey XR 2900: East Plant Access Road and Lots Survey Area H5 Alarm Grids w/ I
<9/'
I IlSection H-I 9.25m
-(Approx,)
llSection WA I I S3i p-- - , I I--- 4 1
I
'7' lSection H-$
/ I S- -- It l I I I/
I Alarm Setpoint 15,500 cprm FR-2900-01, Revision 0 Page 35 of 46 Distance along the CL of this section of road is approx. 60m
Maine Yankee Map ID #:XR 2900-1 SS J Decommissioning Team Maine Yankee DecomnissioningProject Sun'y Formi Revised: 9 W28104 Survey Type: 0 Characterization 0 Turnover W Final Status Survey Survey Area Name: East Plant Access Road and Lots Investigation Survey XR 2900: East Plant Access Road and Lots Survey Area J Alarm Grids EMSection J, Alarm Setpoint 13,900 cpm 925r (Approx.)
Sectio B-3i B-1lnNe
/ m
~ ~ BAILEY BAR
~ FR-2900-01, Revision 0
~'- ~'
NPage 36 of 46 Distance along the is section of road is pprox. 70m
Attachment 2 Survey Unit Instrumentation FR-2900-01, Revision 0 Page 37 of 46
TABLE 2-1 INSTRUMENT INFORMATION E-600 S/N SPA-3 Probe S/N 2488 2055 1645 726560 2618 725328 1606 2055 2617 726554 ISOCS Detectors (Field Measurements)
Detector No. MDC (pCilg) 7722 0.11 to 0.45 7607 0.11 to 0.45 7780 0.11 to 0.45 HPGe Detectors (Laboratory Analysis)
Detector No. MDC (pCi/g)
FSSI_ _ __0.041 to 0.06 FSS2 0.041 to 0.06 FR-2900-01, Revision 0 Page 38 of 46
TABLE 2-2 INSTRUMENT SCAN MDC, DCGL, AND INVESTIGATION LEVEL Parameter Instrument Values Comments SPA-3 Scan MDC 5.9 pCi/g Cs-I 37 LTP Rev 3 Table 5-6 ISOCS Scan MDC 0.11 to 0.45 pCi/g < 25% DCGL Approved DCGL for land DCGL 4.2 pCi/g Cs- 137 areas outside the Restricted DCCL4.2 ~i/ Cs- 37Area, LTP Section 6.7 (Reference 2) 13,600 cpm Sections A, B-1, I 14,300 cpm Section B-2 15,200 cpm Section B-3 16,400 cpm Section C-I 17,400 cpm Section C-2 18,500 cpm Section C-3 E-600 SPA-3 16,000 cpm Section H-1 Investigation Level 17,100 cpm Section H-2 (Alarm Setpoint) 16,400 cpm Section H-3 15,100 cpm Section H-4 15,500 cpm Section H-5 16,300 cpm Section H-6 15,200 cpm Section 1I-7 13,900 cpm Section J 15,200 cpm Section N Investation Level 1.0 pCi/g Cs-1 37 Reference 6 (ISOCS @(-,3 m )__ _ _ _ _ _ _ _ __ _ _ _ _ _ _ _
FR-2900-01, Revision 0 Page 39 of 46
Attachment 3 Investigation Table FR-2900-01, Revision 0 Page 40 of 46
TABLE 3-1 XR2900-01 INVESTIGATION SOIL SAMPLING RESULTS Initial Alarm Invest. Invest.
Elevated Grid Scan arm Scan Scaler Activity DCGL Section Sample Location Value Sctp)oint Value Value (pCi/g Cs-137) Comparison
()cp~m) (cpm) (cpm)
A XR2900013S003 14,220 13,600 14,070 12,970 < 4.55E-02 < DCGL B-1 XR2900013S106 14,200 13,600 13,700 12,070 < 5.78E-02 < DCGL B-I XR2900013S107 14,160 13,600 13,770 11,880 < 4.5 lE-02 <DCGL B-I XR2900013S109 13,650 13,600 13,490 11,510 < 4.34E-02 <DCGL B-1 XR2900013S 110 13,650 13,600 14,070 12,090 < 4.30OE-02 < DCGL B-I XR2900013S 111 13,790 13,600 13,150 12,010 < 5.01 E-02 < DCGL B-1 XR2900013 S112 13,680 13,600 13,510 12,260 < 4.81E-02 < DCGL B-1 XR2900013 S115 13,600 13,600 13,670 11,990 < 4.76E-02 < DCGL B-1 XR2900013S118 13,910 13,600 13,540 11,890 <5.42E-02 <DCGL 3 XR2900013S168 14,510 13,900 14,300 12,650 < 4.72E-02 < DCGL J XR2900013SI71 14,220 13,900 14,490 12,670 < 5.06E-02 < DCGL B-3 XR2900013S189 15,680 15,200 15,250 13,430 < 4.78E-02 < DCGL B-3 XR2900013S192 15,210 15,200 15,250 13,810 < 4.71E-02 < DCGL B-3 XR2900013S195 15,600 15,200 15,320 13,780 < 5.24E-02 < DCGL B-3 XR2900013S198 15,310 15,200 15,140 13,440 < 4.69E-02 < DCGL B-3 XR2900013S201 15,870 15,200 15,500 14,070 < 5.37E-02 < DCGL C-I XR2900013S225 16,430 16,400 16,280 14,180 < 4.72E-02 < DCGL C-I XR2900013S231 16,490 16,400 16,980 15,020 < 5.21 E-02 < DCGL C-la XR2900013S237 16,510 16,400 17,530 15,470 < 5.67E-02 < DCGL C-la XR2900013S240 16,700 16,400 17,110 14,920 < 5.35E-02 <DCGL C-la XR2900013S243 16,920 16,400 17,270 15,350 < 4.87E-02 < DCGL C-la XR2900013S246 16,650 16,400 17,580 15,480 < 5.06E-02 <DCGL C-la XR2900013S249 17,120 16,400 17,410 15,860 < 4.78E-02 < DCGL C-la XR2900013S252 17,350 16,400 17,030 15,180 < 5.27E-02 < DCGL C-la XR2900013S255 17,010 16,400 17,680 15,490 < 4.47E-02 <DCGL C-2 XR2900013S259 17,990 17,400 17,200 15,430 < 5.11 E-02 <DCGL C-2 XR2900013S265 17,560 17,400 18,180 15,950 < 4.84E-02 <DCGL C-2 XR2900013S268 17,590 17,400 18,030 16,150 < 5.31 E-02 < DCGL C-2 XR2900013S273 17,910 17,400 17,430 15,710 < 4.34E-02 < DCGL C-2 XR2900013S276 17,820 17,400 17,830 16,070 < 5.26E-02 < DCGL H-5 XR2900013S319 15,750 15,500 15,280 13,650 < 4.76E-02 < DCGL H-5 XR2900013S340 18,140 15,500 16,790 1 16,840 < 4.78E-02 <DCGL Survey Unit Mean / DCGL 0.011 Total 0.011 NOTES: 1. "< indicates value less than MDA, MDA value is reported.
FR-2900-01, Revision 0 Page 41 of 46
Attachment 4 Statistical Data FR-2900-01, Revision 0 Page 42 of 46
Survey Package FR 2900 Unit I Soil Sign Test Summary
.- "'&-'0j,~EvaIuation luifutVaeius? e r7. f~ CormkenisQ';j j-Survey Package: FR 2900 East Access Road Survey Unit: 01 Evaluator: Anderson DCGL,: 4.20E+00 Cs-1 37 DCGL outside Restricted Area DCGLemc: N/A LBGR: 3.50E+00 Sigma: 2.30E-01 LTP Rev. 3 Table 5-I1C for FR 2900 Type I error: 0.05 Type II error: 0.05 Nuclide: CS-137 Soil Type: N/A
'-,(j;<<Ziz<-3.,,--'5,C'alcU'lat ,va ueis ff~th fl .. - ' Co
- A 1.645 Sign p: 099865 Calculated Relative Shift: . 3.0 Relative Shift Used. :3.0 Uses 3.0 if Relative Shift is >3 N-Value: ;,, ;-;u ,__, ,,- -i1 N-Value+20%: . ' 14
< ..-a '>>b<.Sampe,bWffiaae's,.Svt , - .Cormr er-tSE~tt' Number of Samples: '..;__ W _ __ _ __ _ __ _
Median: ' ' 68E-02 Mean: .> 4.67E-02 Net Sample Standard Deviation: 32E-03 Total Standard Deviation: : 32E-03 Maximum: .53iE-02
_ Cornmindin No-Adjusted N Value: .'-,4 __.._____ ___':_'__ ____ ___4 Value:
S + __ _ _ _ _ __ _ _ _ _ _ __ _ _ _ _ __ _ _ _ _ _
Critical Value: , ____.__.",';__'"'"-__'-__10 Sign test results: : "Pass Sufficient samples collected: .':'-___Pass Maximum value <DCGLw: r. - Pass Median value <DCGL,: .' .8 'Pass Mean value <DCGL,: ;_';___ _____,,__:;Pass Maximum value <DCGL.m¢: Pas's N/A for Class 3 Total Standard Deviation <=Sigma: * .:.-'Pass Criteria comparison results: :, . -Pass
- NRws_ t C The survey unit passes all conditions:l 2 'i*~ ,',-P-<:'l Pass Survey Unit Passes FR 2900-SUI-SoilSign~xs 2117/05 7:30 AM FR-2900-01, Revision 0 Page 43 of 46
FR-2900 SU-1 Quantile Plot 1.OOE-01 --V 9.OOE-02 _ __ _ . _ _ _ _
8.OOE-02 7.OOE-02 0)
- 0. 6.OOE-02 01 O
Q 5.OOE-02
-* Activity 1
.~
rs 6 9:1 9 V . . I- MedianI
- 9:
TO *
'0- 4.OOE-02 3.OOE-02 *1 2.OOE-02 1.OOE-02 -F O.OOE+OO I; 0.0 25.0 50.0 75.0 100.0 Percent
One-Sample T-Test Report Page/Date/Time 2 9/28/04 6:38:32 AM Database Variable C2 Plots Section Histogram of FR-2900, SU-1 en E
a) z E
Activity (pCig)
FR-2900-01, Revision 0 Page 45 of 46
One-Sample T-Test Power Analysis Page/Date/Time 2 9/28104 6:39:53 AM Chart Section Retrospective Power Curve 1.0-0.8-0.6-0~
0.4-0.21 ---- - ----
0 -i -_ A t Survey Unit Mean (pCi/g)
FR-2900-O0I, Revision 0 Page 46 of 46