ML14121A582

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Enclosure 2 to OMY-14-039 - Independent Spent Fuel Storage Installation Annual Radiological Environmental Operating Report January - December 2013
ML14121A582
Person / Time
Site: Maine Yankee
Issue date: 04/22/2014
From:
Radiation Safety & Control Services
To:
Office of Nuclear Material Safety and Safeguards
References
OMY-14-039
Download: ML14121A582 (42)
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OMY-14-039 ENCLOSURE 2 MAINE YANKEE INDEPENDENT SPENT FUEL STORAGE INSTALLATION ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT JANUARY - DECEMBER 2013

MAINE YANKEE INDEPENDENT SPENT FUEL STORAGE INSTALLATION License No. DPR-36 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT January - December 2013 Redssto. Safet & COMIOI Seirice March 2014 Prepared by:

Radiation Safety & Control Services 91 Portsmouth Avenue Stratham, NH 03885-2468

EXECUTIVE

SUMMARY

The Maine Yankee Independent Spent Fuel Storage Installation (ISFSI) has been in operation since 2001. All fuel has been transferred into dry storage casks and placed at the Independent Spent Fuel Storage Installation. The Radiological Environmental Monitoring Program (REMP) for the Maine Yankee ISFSI located in Wiscasset, ME was continued for the period January through December 2013 in compliance with the Maine Yankee Off-Site Dose Calculation Manual (ODCM).

Several changes were made to the ODCM during 2013. The primary change was to provide an updated Figure 3.1 that includes a Storage/Maintenance building. In addition, there were additional minor administrative changes.

By design, there are no liquid or gaseous effluents associated with the operation of the ISFSI. Therefore, the ODCM only requires monitoring of direct exposure from the facility. TLDs were used to measure direct gamma exposure at nine locations in the vicinity of the ISFSI and one control location 5.2 kilometers away. The results of these measurements showed no significant change in exposure rates and potential doses to members of the public during the monitoring period. The results of the monitoring performed in 2013 also show that operating the Maine Yankee ISFSI results in only a small fraction of the 40 CFR Part 190 and 10 CFR Part 72.104 direct radiation dose limit of 25 mrem/year to members of the public.

MY 2013 Annual REO Report Page 2 of 39

TABLE OF CONTENTS Section Title Page

1.0 INTRODUCTION

............................................................................. 6 2.0 GENERAL ISFSI AND SITE INFORMATION ................................. 7 3.0 PROGRAM DESIGN ....................................................................... 7 3.1 M ONITO RING ZONES .................................................................................. 7 3.2 PATHW AYS M ONITORED ............................................................................. 8

3.3 DESCRIPTION

OF MONITORING PROGRAM .................................................... 8 4.0 RADIOLOGICAL DATA

SUMMARY

TABLES ............................. 13 5.0 ANALYSIS OF ENVIRONMENTAL RESULTS ............................. 38 5.1 SAMPLING PROGRAM DEVIATIONS ............................................................. 38 5.2 DIRECT RADIATION PATHW AY ....................................................................... 38

6.0 REFERENCES

............................................................................. 39 MY 2013 Annual REO Report Page 3 of 39

LIST OF TABLES Table Title Paqe 3.1 Radiological Environmental Monitoring Program ...................... 9 3.2 Radiological Environmental Monitoring Locations ................. 10 4.1 TLD Measurements by Quarter .................................................. 14 4.2 Exposure Rates from TLD Measurements ................................. 15 4.3 Environmental TLD Data Summary ........................................... 16 4.4 Direct Dose from ISFSI Operations .......................................... 17 MY 2013 Annual REO Report Page 4 of 39

LIST OF FIGURES Figure Title Page 3.1 Radiological Environmental Monitoring Locations (within 0.28 km ) ........................................................................... 11 3.2 Direct Radiation Monitoring Locations (outside 1 km ) ............................................................................ 12 4.1 Exposure Rate Trend at TL-I-02 .................................................. 18 4.2 Exposure Rate Trend at TL-I-04 .................................................. 20 4.3 Exposure Rate Trend at TL-I-06 .................................................. 22 4.4 Exposure Rate Trend at TL-1-08 .................................................. 24 4.5 Exposure Rate Trend at TL-1-10 .................................................. 26 4.6 Exposure Rate Trend at TL-1-12 .................................................. 28 4.7 Exposure Rate Trend at TL-1-14 .................................................. 30 4.8 Exposure Rate Trend at TL-1-15 .................................................. 32 4.9 Exposure Rate Trend at TL-1-16 .................................................. 34 4.10 Exposure Rate Trend at Control LocationTL-O-36 .................. 36 MY 2013 Annual REO Report Page 5 of 39

1.0 INTRODUCTION

This report summarizes the findings of the Radiological Environmental Monitoring Program (REMP) conducted by Maine Yankee in the vicinity of the Independent Spent Fuel Storage Installation in Wiscasset, Maine during the calendar year 2013. It is submitted annually in compliance with Appendix A, of the Off-site Dose Calculation Manual (ODCM). The remainder of this report is organized as follows:

Section 2: Provides a brief description of the Maine Yankee site and its environs.

Section 3: Provides a description of the overall REMP design. Included is a summary of the requirements for REMP sampling, tables listing routine TLD monitoring locations with compass sectors and distances from the ISFSI, and maps showing the location of each of the TLD monitoring locations.

Section 4: Provides a complete set of TLD data showing measured results (mR), TLD data converted to exposure rates (pR per hour) and calculated doses (mrem per year). This section also provides the summarized exposure rate data in the format specified by the NRC Branch Technical Position on Environmental Monitoring (Reference 1).

Section 5: Provides the results of the monitoring program. The performance of the program in meeting ODCM requirements is discussed, and the data acquired during the year is analyzed.

Section 6: References MY 2013 Annual REO Report Page 6 of 39

2.0 GENERAL ISFSI AND SITE INFORMATION The Maine Yankee Independent Spent Fuel Storage Installation (ISFSI) is located in the town of Wiscasset, Lincoln County, Maine, approximately six miles northeast of Bath, Maine. The site vicinity is rural and lightly populated.

The ISFSI site is located near Bailey Point, a peninsula bounded to the east by the Back River and to the west by a shallow inlet known as Bailey Cove, both of which are part of the Montsweag Bay-Sheepscot River Estuary. Bailey point is an elongated bedrock ridge with flat or gently rolling topography rising to an average elevation of about 25 feet above sea level.

The Radiological Environmental Monitoring Program (REMP) for the ISFSI began pre-operational measurements in the 4th quarter of 1999, approximately 2 years prior to the initial spent fuel transfer to the ISFSI. The ISFSI REMP has been in continuous operation since this transfer began.

3.0 PROGRAM DESIGN The Radiological Environmental Monitoring Program (REMP) for the Maine Yankee ISFSI was designed to provide assurance to regulatory agencies and the public that the station's environmental impact is known and within anticipated limits. The direct dose limit for members of the public from operation of the ISFSI is 25 mrem per year (References 3 and 4).

The detailed sampling requirements of the REMP are given in the ODCM. The sampling requirements specified in the ODCM are summarized in Table 3.1 of this report. Details of the monitored locations are shown in Table 3.2, as well as Figures 3.1 and 3.2 of this report.

3.1 Monitoring Zones The REMP is designed to allow comparison of levels of radioactivity in samples from the area possibly influenced by the ISFSI to levels found in areas not influenced by the ISFSI. The first area is called "indicator stations". The second area is called "control stations". The distinction between the two is based on relative direction from the facility and distance. Analysis of survey data from the two zones aids in determining if there is a significant difference between the two areas. It can also help in differentiating between radioactivity or radiation due to releases and that due to other fluctuations in the environment, such as seasonal variations in the natural background.

MY 2013 Annual REO Report Page 7 of 39

3.2 Pathways Monitored Based on the design of the ISFSI, only the direct radiation exposure pathway is monitored by the REMP. This pathway is monitored by the collection of thermoluminescent dosimeters (TLDs) which are described in more detail below.

3.3 Description of Monitoring Program 3.3.1 Direct Radiation Direct gamma radiation exposure was continuously monitored during 2013 with the use of thermoluminescent dosimeters (TLDs). At each monitoring location, these TLDs are sealed in plastic bags and attached to an object such as a tree, fence or utility pole. The TLDs are posted and retrieved on a quarterly basis. All TLDs are provided and processed by a National Voluntary Laboratory Accreditation Program (NVLAP) certified vendor. The TLDs are placed at various locations around the Independent Spent Fuel Storage Installation (ISFSI). Table 3.2 lists the Station ID Codes, distances and direction of the TLDs from the ISFSI.

3.3.2 Special Monitoring Special samples can be taken that are not required in the ODCM. The sample locations do not appear in Table 3.1 or 3.2 of this report. For this monitoring period, no special samples were collected as part of the Maine Yankee ISFSI Radiological Environmental Monitoring Program.

MY 2013 Annual REO Report Page 8 of 39

Table 3.1 Radiological Environmental Monitoring Program Exposure Collection Analysis Pathway and/or Number of Routine Collection Analysis Analysis Sample Sample Sampling Frequency Type Frequency Media Locations Mode Direct Total Locations:10 Continuous Quarterly Gamma Quarterly Radiation (9 around dose (TLD) perimeter of the site and 1 offsite control location)

MY 2013 Annual REO Report Page 9 of 39

Table 3.2 Radiological Environmental Monitoring Locations Station Distance Direction Stode Station Description Zone From ISFSl Code (kin) From ISFSI TL-I-02 Spent Fuel Storage (I)** 1 < 0.28 N TL-I-04 Spent Fuel Storage (I)** 1 < 0.28 NE TL-I-06 Spent Fuel Storage (I)** 1 < 0.28 E TL-1-08 Spent Fuel Storage (1)** 1 < 0.28 SE TL-1-10 Spent Fuel Storage (I)** 1 < 0.28 S TL-1-12 Spent Fuel Storage (I)** 1 < 0.28 SW TL-1-14 Spent Fuel Storage (I)** 1 < 0.28 W TL-1-1 5 Spent Fuel Storage (I)** 1 < 0.28 WNW TL-1-16 Spent Fuel Storage (I)** 1 < 0.28 NW TL-O-36 Wiscasset Fire Station (0) 5.2 NW

  • 2 = Control TLD; 1 = Indicator TLD
    • I = Inner Ring TLD; 0 = Outer Ring TLD MY 2013 Annual REO Report Page 10 of 39

Table 3.2 Radiological Environmental Monitoring Locations Distance Direction Station Station Description Zone From ISFSI Dron Code (km) From ISFSI TL-1-02 Spent Fuel Storage (I)** 1 < 0.28 N TL-1-04 Spent Fuel Storage (I)** 1 < 0.28 NE TL-1-06 Spent Fuel Storage (I)** 1 < 0.28 E TL-1-08 Spent Fuel Storage (I)** 1 < 0.28 SE TL-1-10 Spent Fuel Storage (I)** 1 < 0.28 S TL-1-12 Spent Fuel Storage (I)** 1 < 0.28 SW TL-1-14 Spent Fuel Storage (I)** 1 < 0.28 W TL-1-15 Spent Fuel Storage (I)** 1 < 0.28 WNW TL-1-16 Spent Fuel Storage (I)** 1 < 0.28 NW TL-O-36 Wiscasset Fire Station (0) 2 5.2 NW

  • 2 = Control TLD; 1 = Indicator TLD
    • I = Inner Ring TLD; 0 = Outer Ring TLD MY 2013 Annual REO Report Page 10 of 39

Table 3.2 Radiological Environmental Monitoring Locations Station

  • Distance Direction Code Station Description Zone From ISFSl Dreton1 (km) From ISFSl TL-1-02 Spent Fuel Storage (I)** 1 < 0.28 N TL-1-04 Spent Fuel Storage (I)** 1 < 0.28 NE TL-I-06 Spent Fuel Storage (I)** 1 < 0.28 E TL-1-08 Spent Fuel Storage (I)** 1 < 0.28 SE TL-1-10 Spent Fuel Storage (I)** 1 < 0.28 S TL-1-12 Spent Fuel Storage (I)** 1 < 0.28 SW TL-1-14 Spent Fuel Storage (I)** 1 < 0.28 W TL-1-15 Spent Fuel Storage (I)** 1 < 0.28 WNW TL-1-16 Spent Fuel Storage (I)** 1 < 0.28 NW TL-O-36 Wiscasset Fire Station (0) 2 5.2 NW
  • 2 = Control TLD; 1 = Indicator TLD
    • I = Inner Ring TLD; 0 = Outer Ring TLD MY 2013 Annual REO Report Page 10 of 39

Figure 3.1 Radiological Environmental Monitoring Locations (within 0.28 km)

MY 2013 Annual REO Report Page 11 of 39

Figure 3.2 Direct Radiation Monitoring Locations (outside 1 km)

MY 2013 Annual REO Report Page 12 of 39

4.0 RADIOLOGICAL DATA

SUMMARY

TABLES This section summarizes the analytical results of the environmental samples, which were collected during the monitoring period.

  • Data from direct radiation measurements made by TLDs are presented in Table 4.1.
  • The direct measurements presented in Table 4.1 are converted to exposure rates in the following manner:

o The total TLD exposure time is determined from the anneal and read dates.

o The total deployment time is determined from the placement and retrieval dates.

o The non-deployment time is converted to exposure and subtracted from the TLD reading presented in Table 4.1.

" The resulting net exposure (deployment exposure) is divided by the deployment time in hours to calculate the exposure rate in pR per hour.

o The calculated exposure rates are presented in Table 4.2.

  • The summarized exposure rate results, shown in Table 4.3, are presented in a format similar to that prescribed in the NRC's Radiological Assessment Branch Technical Position on Environmental Monitoring (Reference 1).

" Table 4.4 presents the estimated direct dose from lSFSI operations as determined by TLD data shown in Table 4.1.

MY 2013 Annual REO Report Page 13 of 39

Table 4.1 TLD Measurements by Quarter (mR)

Station ID Direction 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr TL-I-02 N 31 29 27 32 TL-1-04 NE 30 29 27 31 TL-I-06 E 46 43 32 ND TL-I-08 SE 33 27 28 31 TL-1-10 S 33 31 30 33 TL-1-12 SW 28 29 28 37 TL-1-14 W 33 31 28 36 TL-I-15 WNW 35 34 29 37 TL-1-16 NW 35 32 29 34 TL-O-36 Control 30 27 30. ND TL-O-36a Control Backup 31 29 33 32 Note: ND = no data. TLDs at TL-I-06 and TL-O-36 were damaged by water and ice in the fourth quarter.

MY 2013 Annual REO Report Page 14 of 39

Table 4.2 Exposure Rates from TLD Measurements (pR per hour)

Station ID Direction 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Annual Ave TL-I-02 N 5.9 8.1 4.9 7.1 6.5 TL-I-04 NE 5.4 8.1 4.9 6.7 6.3 TL-1-06 E 12.8 14.5 7.2 ND 11.5 TL-I-08 SE 6.8 7.2 5.4 6.7 6.5 TL-1-10 S 6.8 9.0 6.3 7.5 7.4 TL-1-12 SW 4.5 8.1 5.4 9.3 6.8 TL-1-14 W 6.8 9.0 5.4 8.8 7.5 TL-1-15 WNW 7.7 10.4 5.8 9.3 8.3 TL-1-16 NW 7.7 9.5 5.8 8.0 7.7 TL-O-36 Control 5.7 7.6 7.0 7.1 6.8 Note: ND = no data. TLD at TL-1-06 was damaged by water and ice in the fourth quarter.

MY 2013 Annual REO Report Page 15 of 39

Table 4.3 Environmental TLD Data Summary (pR per hour)

Inner Ring TLDs Control TLD's Station With Highest Mean Mean Mean Station # Mean (Range) (Range) (Range)

(No. Measurements)* (No. Measurements)* (No. Measurements)*

7.5 6.8 TL-1-06 11.5 (4.5-14.5) (5.7-7.6) (7.2-14.5)

(35) (7) 1 (3)

  • Each "measurement" is based on quarterly readings MY 2013 Annual REO Report Page 16 of 39

Table 4.4 Direct Dose from ISFSI Operations (mrem)

QI Q2 Q3 Q4 Net TLD Calculated Net TLD Calculated Net TLD Calculated Net TLD Calculated Annual Station ID Result Dose Result Dose Result Dose Result Dose Dose TL-1-02 0.50 0.01 1.00 0.06 0.00 0.00 0.00 0.00 0.07 TL-1-04 0.00 0.00 1.00 0.06 0.00 0.00 0.00 0.00 0.06 TL-1-06 15.50 0.23 15.00 0.89 0.50 0.03 ND ND 1.15 TL-1-08 2.50 0.04 0.00 0.00 0.00 0.00 0.00 0.00 0.04 TL-1-10 2.50 0.04 3.00 0.18 0.00 0.00 1.00 0.01 0.23 TL-1-12 0.00 0.00 1.00 0.06 0.00 0.00 5.00 0.07 0.13 TL-1-14 2.50 0.04 3.00 0.18 0.00 0.00 4.00 0.06 0.28 TL-1-15 4.50 0.07 6.00 0.36 0.00 0.00 5.00 0.07 0.50 TL-1-16 4.50 0.07 4.00 0.24 0.00 0.00 2.00 0.03 0.34 Max Dose => 1.15 Notes:

1. Doses based on a 32.5 hour5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> occupancy in both of the first and fourth quarters and a 130 hour0.0015 days <br />0.0361 hours <br />2.149471e-4 weeks <br />4.9465e-5 months <br /> occupancy in both of the second and third quarters.
2. Some of the net TLD results were negative and rounded up to zero
3. ND = no data. TL-1-06 was damaged in the fourth quarter.

MY 2013 Annual REO Report Page 17 of 39

Figure 4.1 Exposure Rate Trenc 1200400 O00VOL Result - Discri mination Level Sample Name Date Collected Result 2 Sigma Error Discrimination Level TL-1-02-001 0313112003 5.4E+000 pR/h t

  • 1.18E+000 2.5E+000 TL-I-02-002 06/3012003 8.OE+000 pR/h t
  • 1.10E+000 2.5E+000 TL-I-02-003 09/30/2003 6.9E+000 PR/h t
  • 1.00E+000 2.5E+000 TL-I-02-004 12/3112003 8.5E+000 pR/h t
  • 9.OOE-001 2.5E+000 TL-I-02-005 03/31/2004 6.4E+000 pR/h t
  • 8.20E-001 2.5E+000 TL-I-02-006 06/30/2004 8.3E+000 pR/h t
  • 8.00E-001 2.5E+000 TL-I-02-007 09/30/2004 6.2E+000 pR/h t
  • 6.60E-001 2.5E+000 TL-I-02-008 12/31/2004 6.8E+000 pR/h t
  • 7.40E-001 2.5E+000 TL-1-02-009 03/31/2005 8.6E+000 pR/h t
  • 8.60E-001 2.5E+000 TL-I-02-010 06/30/2005 7.8E+000 pR/h t
  • 7.80E-001 2.5E+000 TL-I-02-011 09/30/2005 1.1 E+001 pR/h t
  • 1.08E+000 2.5E+000 TL-1-02-012 12/31/2005 8.OE+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-02-013 03/31/2006 8.4E+000 PR/h t
  • 8.40E-001 2.5E+000 TL-1-02-014 06/30/2006 7.9E+000 pR/h t
  • 7.80E-001 2.5E+000 TL-1-02-015 09/30/2006 8.8E+000 MR/h t
  • 8.80E-001 2.5E+000 TL-1-02-016 12/31/2006 1.2E+001 pR/h t
  • 1.16E+000 2.5E+000 TL-I-02-017 03/31/2007 7.4E+000 MR/h t
  • 7.40E-001 2.5E+000 TL-1-02-018 06/30/2007 8.1 E+O0O MR/h t
  • 8.OOE-001 2.5E+000 TL-1-02-019 09/30/2007 7.OE+O0O MR/h t
  • 7.OOE-001 2.5E+000 TL-1-02-020 12/31/2007 7.6E+000 MR/h t
  • 7.60E-001 2.5E+000 TL-I-02-021 03/31/2008 7.6E+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-I-02-022 06/30/2008 7.9E+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-I-02-023 09/30/2008 7.1E+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-I-02-024 12/31/2008 7.6E+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-1-02-025 03/31/2009 9.4E+000 MR/h t
  • 1.OOE+000 2.5E+000 TL-I-02-026 06/30/2009 6.2E+000 MR/h t
  • 6.OOE-001 2.5E+000 TL-I-02-027 09/3012009 4.8E+000 MR/h t
  • 4.OOE-001 2.5E+000 TL-I-02-028 12/31/2009 4.5E+000 MR/h t
  • 4.OOE-001 2.5E+000 TL-I-02-029 03/31/2010 7.4E+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-1-02-030 06/30/2010 6.8E+OO0 MR/h t
  • 6.OOE-001 2.5E+000 Results marked with
  • are greater than 2 Sigma Error.

Results m w*: x rratsm*Di~l*ination Level Page 18 of 39

l123M I 00"OI t.o*+=O gOLO*+=

Result Discrimination Level Sample Name Date Collected Result 2 Sigma Error Discrimination Level TL-1-02-031 09/30/2010 5.7E+000 pR/h t

  • 6.OOE-001 2.5E+000 TL-1-02-032 12/31/2010 5.5E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-02-033 03/31/2011 4.7E+000 pR/h t
  • 4.00E-001 2.5E+000 TL-1-02-034 06/30/2011 6.OE+000 MR/h t
  • 6.OOE-001 2.5E+000 TL-1-02-035 09/30/2011 7.7E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-02-036 12/31/2011 6.OE+000 pR/h t
  • 6.00E-001 2.5E+000 TL-1-02-037 03/31/2012 6.6E+000 MR/h t
  • 6.OOE-001 2.5E+000 TL-1-02-038 06130/2012 5.9E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-02-039 09/30/2012 5.6E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-02-040 12/31/2012 9.3E+000 pR/h t
  • 1.OOE+000 2.5E+000 TL-1-02-041 03/31/2013 5.9E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-02-042 06/30/2013 8.1E+000 PR/h t
  • 8.OOE-001 2.5E+O000 TL-1-02-043 0913012013 4.9E+000 pR/h t
  • 4.OOE-001 2.5E+000 TL-1-02-044 12/31/2013 7.1 E+000 pR/h t
  • 8.OOE-001 2.5E+000 Results marked with
  • are greater than 2 Sigma Error.

l tg ar Results ma MYZU:**rMal Level lU Kepon Page 19 of 39

Figure 4.2 Exposure Rate Trend at TL-1-04 Iniao r oains-T--0 :Rc TD [xosr ae U01+0 120" 1 I - Result " Discrimination Level Sample Name Date Collected Result 2 Siama Error Discrimination Level TL-I-04-001 03/31/2003 5.1 E+000 pR/h t

  • 1.26E+000 2.5E+000 TL-I-04-002 06/30/2003 8.4E+000 pR/h t
  • 1.02E+000 2.5E+000 TL-I-04-003 09/30/2003 6.5E+000 pR/h t
  • 7.20E-001 2.5E+000 TL-I-04-004 12/31/2003 8.3E+000 pR/h t
  • 1.14E+000 2.5E+000 TL-I-04-005 03/31/2004 6.9E+000 pR/h t
  • 7.80E-001 2.5E+000 TL-I-04-006 06/30/2004 7.8E+000 pR/h t
  • 1.08E+000 2.5E+000 TL-1-04-007 09/30/2004 6.3E+000 pR/h t
  • 6.20E-001 2.5E+000 TL-1-04-008 12/31/2004 6.3E+000 pR/h t
  • 4.20E-001 2.5E+000 TL-I-04-009 03/31/2005 8.6E+000 pR/h t
  • 8.60E-001 2.5E+000 TL-1-04-010 06/30/2005 8.2E+000 pR/h t
  • 8.20E-001 2.5E+000 TL-I-04-011 09/30/2005 9.1E+000 pR/h t
  • 9.OOE-001 2.5E+000 TL-1-04-012 12/31/2005 8.OE+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-I-04-013 03/31/2006 6.9E+000 pR/h t
  • 6.80E-001 2.5E+000 TL-1-04-014 06/30/2006 7.5E+000 pR/h t
  • 7.40E-001 2.5E+000 TL-1-04-015 09/30/2006 8.4E+000 MR/h t
  • 8.40E-001 2.5E+000 TL-1-04-016 12/31/2006 1.2E+001 MR/h t
  • 1,16E+000 2.5E+000 TL-1-04-017 03/31/2007 7.OE+000 pR/h t 7.OOE-001 25E+000 TL-1-04-018 06/30/2007 6.7E+000 MR/h t
  • 6.60E-001 2.5E+000 TL-1-04-019 09/30/2007 5.9E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-I-04-021 03/31/2008 7.6E+000 pR/h t
  • 8.00E-001 2.5E+000 TL-I-04-022 06/30/2008 4.9E+000 pR/h t
  • 4.OOE-001 2.5E+000 TL-I-04-023 09/30/2008 5.3E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-04-024 12/31/2008 8.9E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-04-025 03/31/2009 7.9E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-I-04-026 06/30/2009 5.8E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-I-04-027 09/30/2009 6.2E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-I-04-028 12/31/2009 4.9E+000 pR/h t
  • 40E-001 2.5E+000 TL-1-04-029 03/31/2010 8.3E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-I-04-030 06/30/2010 7.8E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-04-031 09/30/2010 1.3E÷001 pR/h t
  • 1.20E+000 2.5E+000 Results marked with
  • are greater than 2 Sigma Error.

Results mar%,VMYZ1*/r]Ual y, greater AtfUteporl hDiscuimination Level Page 20 of 39

120"M~

00"MO 10 Result Discrimination Level Sample Name Date Collected Result 2 Sigma Error Discrimination Level TL-1-04-032 12/31/2010 5.5E+000 MR/h t

  • 6OOE-001 2.5E+000 TL-1-04-033 03/31/2011 6.7E+000 JR/h t
  • 6.00E-001 2.5E+000 TL-1-04-034 06/30/2011 6.5E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-I-04-035 09/30/2011 8.IE+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-I-04-036 12/31/2011 6.9E+000 pR/h t
  • 6.00E-001 2.5E+000 TL-I-04-037 03/31/2012 5.2E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-I-04-038 06/30/2012 5.OE+000 MR/h t
  • 4.OOE-001 2.5E+000 TL-I-04-039 09/30/2012 6.5E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-04-040 12/31/2012 8.8E+000 pMRh t
  • 8.OOE-001 2.5E+000 TL-1-04-041 03/31/2013 5.4E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-04-042 06/30/2013 8.1E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-04-043 09/30/2013 4.9E+000 MR/h t
  • 4.OOE-001 2.5E+000 TL-1-04-044 12/31/2013 6.7E+000 pR/h t"* 6.OOE-001 2.5E+000 Results marked with
  • are greater than 2 Sigma Error.

Results mar*i arraatrl hDiirination Level Page 21 of 39

Figure 4.3 U1111"M loop=

i 40"M A

125"M A AA --I )i. A- I\ Vý iAD"w 'A % 11 !Lkz ý%I ý ao*ý= V N*I 46 GOW#4=

400"M 10*44A CLOW0110

'.4 $1

"- Result - Discrimination Level q-mnl. M.- ntat r:nll-tdm Rn lit 9 ~nmnFrrr fi- rlInsmti I va TL-1-06-001 03131/2003 7.IE+000 jR/h t* 1.36E+000 2.5E'-000 TL-1-06-002 06/30/2003 9.6E+000 pR/h t

  • 1.OOE+000 2.5E+000 TL-1-06-003 09/30/2003 9.1E+000 pR/h t - 1.46E+000 2.5E+000 TL-1-06-004 12/31/2003 1.2E+001 pR/h t
  • 1.16E+000 2.5E+000 TL-1-06-005 03/31/2004 9.6E+000 MR/h t
  • 9.40E-001 2.5E+000 TL-1-06-006 06/30/2004 1.1E+001 jR/h t* 1.72E+000 2.5E+000 TL-1-06-007 09/30/2004 9.7E+000 pR/h t
  • 1.20E+000 2.5E+000 TL-l-06-08 12/31/2004 9.6E+000 jR/h t
  • 1.24E+000 2.5E+000 TL-1-06-009 03/31/2005 1.1E+001 pR/h t
  • 1.1 2E+000 2.5E+000 TL-1-06-010 06/30/2005 I.4E+001 MR/h t
  • 1.38E+000 2.5E+000 TL-1-06-01 1 09/30/2005 1.2E+001 MR/h t
  • 1.18E+000 2.5E+000 TL-I-06-12 12/31/2005 1.OE+001 MR/h t
  • 1.04E+000 2.5E+000 TL-1-06-013 03/31/2006 t.5E+001 jR/h t
  • 1.48E+000 2.5E+000 TL-1-06-014 06/30/2006 1.1E+001 jR/h t
  • 1.12E+000 2.5E+000 TL-I-06-1 5 09/30/2006 1.4E+001 jR/h 1
  • 1.40E+000 2.5E+000 TL-1-06-016 12/31/2006 1.2E+001 JR/h 1
  • 1.16E+000 2.5E+000 TL-1-06-017 03/31/2007 1.1E+001 JR/h t
  • 1.1OE+000 2.5E+000 TL-1-06-018 06/30/2007 I.OE+001 MR/h t
  • 1.OOE+000 2.5E+000 TL-1-06-019 09/30/2007 1.2E+001 MR/h t
  • 1.18E+000 2.5E+000 TL-1-06-020 12/31/2007 1.2E+001 MR/h t
  • 1.22E+000 2.5E+000 TL-1-06-021 03/31/2008 1.6E+001 MR/h t
  • 1 60E+000 2.5E+000 TL-1-06-022 06/30/2008 1.2E+001 MR/h t
  • 1.20E+000 2.5E+000 TL-1-06-023 09/30/2008 9.OE+000 pMRh t
  • 8.OOE-001 2.5E+000 TL-1-06-024 12/31/2008 9.8E+000 pR/h t
  • I.OOE+000 2.5E+000 TL-1-06-025 03/31/2009 1.6E+001 pR/h t
  • 1.60E+000 2.5E+000 TL-1-06-026 06/30/2009 1.6E+001 pR/h t
  • 1.60E+000 2.5E+000 TL-1-06-027 09/30/2009 S.IE+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-06-028 12/31/2009 1.1E+00t1 MR/h t
  • 1.OOE+000 2.5E+000 TL-1-06-029 03/31/2010 1.4E+001 pR/h t
  • 1.40E+000 2.5E+000 TL-1-06-030 06/30/2010 1.2E+001 pR/h t
  • 1.20E+000 2.5E+000 Results marked with
  • are greater than 2 Sigma Error.t Page 1 of 2 Results mal era t a xr.Jh Discoriina MYV~21:1 -epo!T ion Level ArulIt: Page 22 of 39

14b+1 11 114111 1.40"M A / \A --I )ls

ý' % # 0'*,7 ý V N61 122141011 Result - Discrimination Level Sample Name Date Collected Result 2 Sigma Error Discrimination Level TL-1-06-031 09/30/2010 8.6E+O0O pR/h t

  • 8.OOE-001 2.5E+000 TL-1-06-032 12/31/2010 8.2E+O0O pR/h t
  • 8.OOE-001 2.5E+000 TL-1-06-033 03/31/2011 1.2E+001 pR/h t
  • 1.20E+000 2.5E+000 TL-1-06-034 06/30/2011 6.9E+O0O pR/h t
  • 6.OOE-001 2.5E+000 TL-I-06-035 09/30/2011 1.8E+001 pR/h t
  • 1.80E+000 2.5E+000 TL-I-06-036 12/31/2011 1.1E+001 pR/h t
  • 1.20E+000 2.5E+000 TL-I-06-037 03/31/2012 1.1E+001 pR/h t
  • 1.20E+000 2.5E+000 TL-l-06-038 06/30/2012 1.OE+001 pR/h t
  • 1.OOE+000 2.5E+000 TL-1-06-039 09/30/2012 1.1E+001 pR/h t
  • 1.OOE+000 2.5E+000 TL-1-06-040 12/31/2012 1.7E+001 pR/h t
  • 1.60E+000 2.5E+000 TL-1-06-041 03/31/2013 1.3E+001 pR/h t
  • 1.20E+000 2.5E+000 TL-I-06-042 06/30/2013 1.5E+001 pR/h t
  • 1.40E+000 2.5E+000 TL-l-06-043 09/30/2013 7.2E+000 pR/h t
  • 8.OOE-001 2.5E+000 Results marked with
  • are greater than 2 Sigma Error. Page 2 of 2 Results matk;i ttb ae r ter Discn'ination Level Page 23 of 39 Report generated by ADMS (Analytical Data Management System) © 2006-2007 Radiation Safety & Control Services, Inc. www.radsafety.com

Figure 4.4 1222,gN. Trnnel I 60"01

/ /

I -I.u, -

- Result Discrimination Level Sample Name Date Collected Result 2 Sigma Error Discrimination Level TL-1-08-001 03/31/2003 5.2E+000 pR/h t

  • 1.18E+000 2.5E+000 TL-I-08-002 06/30/2003 8.4E+000 pR/h t
  • 1.24E+000 2.5E+000 TL-I-08-003 09/30/2003 6.5E+000 pR/h t* 9.20E-001 2.5E+000 TL-1-08-004 12/31/2003 9.4E+000 pR/h t
  • 1OOE+000 2.5E+000 TL-1-08-005 03/3112004 8.2E+000 pR/h t
  • 1.14E+000 2.5E+000 TL-1-08-006 06/30/2004 8.2E+000 pR/h t
  • 1.14E+000 2.5E+000 TL-I-08-007 09/30/2004 6.7E+000 pR/h t
  • 5.80E-001 2.5E+000 TL-I-08-008 12/31/2004 6.8E+000 pR/h t
  • 5.40E-001 2.5E+000 TL-1-M009 03/31/2005 1.OE÷001 pR/h t
  • 1.02E+000 2.5E+000 TL-1-08-010 06130/2005 9.1 E+000 pR/h t
  • 9.20E-001 2.5E+000 TL-1-08-011 09/30/2005 1.1 E+001 pR/h t
  • 1.08E+000 2.5E+000 TL-I-08-012 12/31/2005 8.OE+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-I-08-013 03/31/2006 9.3E÷000 MR/h t
  • 9.40E-001 2.5E+000 TL-1-08-014 06/30/2006 7.OE+000 pR/h t
  • 7.OOE-001 2.5E+000 TL-I-08-015 09/30/2006 1.1 E+001 pR/h t
  • 1.08E+000 2.5E+000 TL-I-08-016 12/31/2006 1.6E+001 pR/h t
  • 1.56E+000 2.5E+000 TL-I-08-017 03/31/2007 7.4E+000 pR/h t
  • 7.40E-001 2.5E+000 TL-1-08-018 06/30/2007 8.1 E+000 MR/h t* 8.OOE-001 2.5E+000 TL-1-08-019 09/30/2007 8.6E+000 MR/h t* 8.60E-001 2.5E+000 TL-I-08-020 12/31/2007 8.5E+000 PR/h t* 8.40E-01 2.5E+000 TL-I-08-021 03/31/2008 8.5E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-I-08-022 06/30/2008 7.9E÷000 pR/h t
  • 8.OOE-001 2.5E+000 TL-I-08-023 09/30/2008 7.6E+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-I-08-024 12/31/2008 9.4E+000 MR/h t
  • 1.OOE+000 2.5E+000 TL-I-08-025 03/31/2009 9.9E+000 MR/h t* 1.OOE+000 2.5E+000 TL-1-08-026 06/30/2009 6.7E+000 MR/h t
  • 6.OOE-001 2.5E+000 TL-I-08-027 09/30/2009 7.6E+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-I-08-028 12/31/2009 6.3E+000 MR/h t
  • 6.OOE-001 2.5E+000 TL-I-08-029 03/31/2010 8.3E+000 MR/h t
  • 8OOE-001 2.5E+000 TL-1-08-030 06/30/2010 7.3E+000 MR/h t
  • 8.OOE-001 2.5E+000 Results marked with
  • are greater than 2 Sigma Error.

Results mref MY U1 tt dna* u Discnriination epon Level Page 24 of 39

~~rI 1I 9

I 1,00 120"001 1AWMOO

  • 014 W 111rý A I/ I '9 I- Result - Discrimination Level Sample Name Date Collected Result 2 Sigma Error Discrimination Level TL-1-08-031 09/30/2010 7.8E+000 pR/h t
  • 8.OOE-001 2.511+000 TL-1-08-032 12/31/2010 6.8E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-08-033 03/31/2011 9.2E+000 pR/h t
  • 1.OOE+000 2.5E+000 TL-1-08-034 06/30/2011 8.3E+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-1-08-035 09/30/2011 8.6E+000 pR/h t
  • 8.00E-001 2.5E+000 TL-1-08-036 12/31/2011 7.8E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-08-037 03/31/2012 8.4E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-08-038 06/30/2012 7.3E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-08-039 09/30/2012 8.3E÷000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-08-040 12/31/2012 1.OE+001 pR/h t
  • 1.OOE+000 2.5E+000 TL-1-08-041 03/31/2013 6.8E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-08-042 06/30/2013 7.2E÷000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-08-043 09/30/2013 5.4E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-08-044 12/31/2013 6.7E+000 pR/h t
  • 6.OOE-001 2.5E+000 Results marked with
  • are greater than 2 Sigma Error.

Results meAjlVeq;f MY fi arrteriýr I*_u

~lJArual yiscrimination Level eport Page 25 of 39

Figure 4.5 Exposure Rate Trend Iniao oatos-T--1 EP1 [xoue ae I

12000 Mi~mi -

- Result - Discrimination Level I Sample Name Date Collected Result 2 Sigma Error Discrimination Level TL-1-10-001 03/31/2003 5.2E+000 MR/h t

  • 1.18E+000 2.5E+000 TL-1-10-002 06/30/2003 8.2E+000 pR/h t
  • 1.04E+000 2.5E+000 TL-1-10-003 09/30/2003 6.4E+000 MR/h t
  • 1.1 OE+000 2.5E+000 TL-1-10-004 12/31/2003 8.9E+000 pR/h t
  • 8.60E-001 2.5E+000 TL-1-10-005 03/31/2004 6.9E+000 MR/h t
  • 8.60E-001 2.5E+000 TL-1-10-006 06/30/2004 7.7E+000 MR/h t
  • 1.06E+000 2.5E+000 TL-1-10-007 09/30/2004 6.5E+000 pR/h t
  • 8.40E-001 2.5E+000 TL-1-10-008 12/31/2004 6.5E+000 MR/h t
  • 9.60E-001 2.5E+000 TL-1-10-009 03/31/2005 8.IE+000 pR/h t
  • 8.20E-001 2.5E+000 TL-1-10-010 06/30/2005 8.2E+000 pR/h t
  • 8.20E-001 2.5E+000 TL-1-10-011 09/30/2005 1.OE+001 JR/h t
  • 1.00E+000 2.5E+000 TL-1-10-012 12/31/2005 8.0E+000 JR/h t
  • 8.OOE-001 2.5E+000 TL-1-10-013 03/31/2006 7.4E+000 JR/h t
  • 7.40E-001 2.5E+000 TL-1-10-014 06/30/2006 6.6E+000 MR/h t
  • 6.60E-001 2.5E+000 TL-1-10-015 09/30/2006 8.4E+000 pR/h t
  • 8.40E-001 2.5E+000 TL-1-10-016 12/31/2006 1.2E+001 MR/h t
  • 1.16E+000 2.5E+000 TL-1-10-017 03/31/2007 7.OE+O00 MR/h t
  • 7.OOE-001 2.5E+000 TL-1-10-018 06/30/2007 9.OE+000 MR/h t
  • 9.OOE-001 2.5E+000 TL-1-10-019 09/30/2007 9.2E+000 MR/h t
  • 9.20E-001 2.5E+000 TL-1-10-020 12/31/2007 7.6E+000 MR/h t
  • 7.60E-001 2.5E+000 TL-I-10-021 03/31/2008 9.OE+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-1-10-022 06/30/2008 7.4E+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-1-10-023 09/30/2008 6.7E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-10-024 12131/2008 8.OE+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-10-025 03/31/2009 8.4E+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-1-10-026 06/30/2009 7.5E+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-1-10-028 12/31/2009 7.7E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-I-10-029 03/31/2010 9.6E+000 MR/h t
  • 1.OOE+000 2.5E+000 TL-1-10-030 06/30/2010 7.3E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-10-031 09/30/2010 8.6E+000 JR/h t
  • 8.OOE-001 2.5E+000 Results marked with are greater than 2 Sigma Error Results mail wit.agMar06NDiscridination

%'V 26* *nual *t epo!T Level Page 26 of 39

1206+001

  • 0tol)"

OAOMM I Result - Discrimination Level Sample Name Date Collected Result 2 Sigma Error Discrimination Level TL-1-10-032 12/31/2010 6.4E+OO0 pR/h t

  • 6.OOE-001 2.5E+000 TL-1-1*-033 03/31/2011 7.7E+000 pR/h t
  • 8.0OE-001 2.5E+000 TL-1-10-034 06/30/2011 7.8E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-10-035 09/30/2011 9.8E+000 pR/h t
  • 1.00E+000 2.5E+000 TL-1-10-036 12/31/2011 6.9E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-10-037 03/31/2012 7.9E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-10-038 06/30/2012 7.3E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-l-1*-039 09/30/2012 6.IE+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-10-040 12/31/2012 1.1E+001 pR/h t
  • 1.OOE+000 2.5E+000 TL-1-10-041 03/31/2013 6.8E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-10-042 06/30/2013 9.OE+000 pR/h t
  • 1.OOE+000 2.5E+000 TL-1-10-043 09/30/2013 6.3E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-10-044 12131/2013 7.5E+000 pR/h t
  • 8.OOE-001 2.5E+000 Results marked wth
  • are greater than 2 Sigma Error.

Results maMAY 2U61 w1* a at6rrtDisscniination NnulI<:u*eponT Level Page 27 of 39

Figure 4.6 Exposure Rate Trend at TL-1-12 IndicatorLoain -TL112:RM L [EpsrRte 1.401+01 t.s41 1.00M -- &-

UNoe9

  • aoD*4 to GA01o+oo . o.

I - Result ' Discrimination Level Sample Name Date Collected Result 2 Sigma Error Discrimination Level TL-1-12-001 03/31/2003 6.7E+000 iJR/h t

  • 1.30E+000 2.5E+000 TL-1-12-002 06/30/2003 9.7E+000 MR/h t 1.38E+000 2.5E+000 TL-1-12-003 09/30/2003 8.3E+000 IR/h t
  • 1.14E+000 2.5E+000 TL-1-12-004 12/31/2003 9.8E+000 pR/h t
  • 7.80E-001 2.5E+000 TL-1-12-005 03/31/2004 7.7E+000 MR/h t
  • 1.50E+000 2.5E+000 TL-I-12-006 06/30/2004 1.OE+001 MR/h t
  • 1.14E+000 2.5E+000 TL-1-12-007 09/30/2004 7.6E+000 pR/h t 7.OOE-001 2.5E+000 TL-1-12-008 12/31/2004 7.1E+000 MR/h t
  • 7.40E-001 2.5E+000 TL-1-12-009 03/31/2005 7.6E+000 MR/h t
  • 7.60E-001 2.5E+000 TL-1-12-010 06/30/2005 8.7E+000 MR/h t
  • 8.60E-001 2.5E+000 TL-1-12-011 09/30/2005 9.1 E+000 MR/h t
  • 9.OOE-001 2.5E+000 TL-1-12-012 12/31/2005 8.8E+000 MR/h t
  • 8.80E-001 2.5E+000 TL-1-12-013 03/31/2006 8.4E+000 MR/h t
  • 8.40E-001 2.5E+000 TL-1-12-014 06/30/2006 6.6E+000 MR/h t
  • 6.60E-001 2.5E+000 TL-1-12-015 09/30/2006 8.8E+000 MR/h t
  • 8.80E-001 2.5E+000 TL-1-12-016 12/31/2006 1.3E+001 MR/h t
  • 1.26E+000 2.5E+000 TL-1-12-017 03/31/2007 7.4E÷000 MR/h t
  • 7.40E-001 2.5E+000 TL-1-12-018 06/30/2007 7.2E+000 MR/h t
  • 7.20E-001 2.5E+000 TL-1-12-019 09/30/2007 7.OE+000 MR/h t
  • 7OOE-001 2.5E+000 TL-1-12-020 12/31/2007 7.6E+000 jR/h t
  • 7.60E-001 2.5E+000 TL-1-12-021 03/31/2008 9.OE+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-1-12-022 06/30/2008 8.4E+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-1-12-023 09/30/2008 8.5E+000 MR/h 1t
  • 8.OOE-001 2.5E+000 TL-1-12-025 03/31/2009 8.4E+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-1-12-026 06/30/2009 6.7E+000 jR/h t
  • 6.00E-001 2.5E+000 TL-1-12-028 12/31/2009 6.3E+000 MR/h t
  • 6.OOE-001 2.5E+000 TL-1-12-029 03/31/2010 8.7E+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-1-12-030 06/30/2010 5.9E+000 MR/h t
  • 6.00E-001 2.5E+000 TL-1-12-031 09/30/2010 8.2E+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-1-12-032 12/31/2010 7.3E+000 MR/h t
  • 8.OOE-001 2.5E+000 Results marked with are greater than 2 Sigma Error.

Results m MT26

  • d* with "a e UI/rual atrahDiscrimination k<-u epont Level Page 28 of 39

MOMIe01 9

toONS~O 60*44M Oll"MI o.ooe+04 "I '9 Result Discrimlnation Level Sample Name Date Collected Result 2 Sigma Error Discrimination Level TL-1-12-033 03/31/2011 8.2E+000 pR/h t

  • 8.OOE-001 2.5E+000 TL-1-12-034 06/30/2011 7.8E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-12-035 09/30/2011 7.7E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-I-12-036 12/31/2011 6.9E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-12-037 03/31/2012 7.5E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-12-038 06/30/2012 7.3E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-12-039 09/30/2012 6.5E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-12-040 12/31/2012 9.3E+O0O pR/h t
  • 1.OOE+000 2.5E+000 TL-1-12-041 03/31/2013 4.5E+000 pR/h t
  • 4.OOE-001 2.5E+000 TL-1-12-042 06/30/2013 8.1E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-I-12-043 09/30/2013 5.4E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-12-044 12/31/2013 9.3E+000 pR/h t
  • 1.OOE+000 2.5E+000 Results marked with
  • are greater than 2 Sigma Error.

Results maAr l MY'l agrfeat ul*Annal ~l:U feport isclrimination Level Page 29 of 39

Figure 4.7 Exposure Rate Trend at TL-1-1 4 m I 201400M I - Result - Discrimination Level I Sample Name Date Collected Result 2 Sigma Error Discrimination Level TL-1-14-001 03/31/2003 6.7E+000 MR/h t

  • 1.26E+000 2.5E+000 TL-1-14-002 06/30/2003 9.2E+000 pR/h t
  • 1.04E+000 2.5E+000 TL-1-14-003 09/30/2003 8.3E+000 MR/h t
  • 9.20E-001 25E+000 TL-1-14-004 12/31/2003 9.7E+000 pR/h t
  • 1.OOE+000 2.5E+000 TL-1-14-005 03/31/2004 7.4E+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-1-14-006 06/30/2004 9.8E+000 MR/h t
  • 1.28E+000 2.5E+000 TL-1-14-007 09130/2004 7.8E+000 pR/h t
  • 8.80E-001 2.5E+000 TL-1-14-008 12/31/2004 7.8E+000 MR/h t
  • 9.20E-001 2.5E+000 TL-1-14-009 03/31/2005 1.IE+001 pR/h t
  • 1.06E+000 2.5E+000 TL-1-14-010 06/30/2005 9.6E+000 MR/h t
  • 9.60E-001 2.5E+000 TL-1-14-011 09/30/2005 1.OE+001 pR/h t
  • 1.04E+000 2.5E+000 TL-1-14-012 12/31/2005 1.OE+001 pR/h t
  • 1.OOE+000 2.5E+000 TL-1-14-013 03/31/2006 9.8E+000 pR/h t
  • 9.80E-001 2.5E+000 TL-1-14-014 06/30/2006 9.6E+000 pR/h t
  • 9.60E-001 2.5E+000 TL-1-14-015 09/30/2006 1.OE+001 pR/h t
  • 1.02E+000 2.5E+000 TL-1-14-016 12/31/2006 1.4E+001 pR/h t
  • 1.36E+000 2.5E+000 TL-1-14-017 03/31/2007 8.2E+000 lpR/h t
  • 8.20E-001 2.5E+000 TL-1-14-018 06/30/2007 8.1E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-14-019 09/30/2007 8.1E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-14-020 12/31/2007 8.1 E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-14-021 03/31/2008 1.1E+001 pR/h t
  • 1.OOE+000 2.5E+000 TL-1-14-022 06/30/2008 7.4E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-14-023 09/30/2008 6.7E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-14-024 12/31/2008 8.OE+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-1-14-025 03/31/2009 9.4E+000 pR/h t
  • 1.OOE+000 2.5E+000 TL-1-14-026 06/30/2009 7.5E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-14-027 09/30/2009 5.3E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-14-028 12/31/2009 5.4E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-14-029 03/31/2010 8.3E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-14-030 06/30/2010 5.9E+000 pR/h t
  • 6.OOE-001 2.5E+000 Results marked with are greater than 2 Sigma Error.

Results maf; iTha, MYZ'Inna rDiscrimination I*kutepor: Level Page 30 of 39

I01*0+w0 000000IO 2z.4c=

Result Discrimination Level Sample Name Date Collected Result 2 Sigma Error Discrimination Level TL-1-14-031 09/30/2010 6.5E+000 pR/h t

  • 6.OOE-001 2.5E+000 TL-1-14-032 12/31/2010 8.7E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-14-033 03/31/2011 8.2E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-14-034 06130/2011 7.4E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-14-035 09/30/2011 1.1E+001 pR/h t
  • 1.20E+000 2.5E+000 TL-1-14-036 12/31/2011 4.6E+000 pR/h t
  • 4.OOE-001 2.5E+000 TL-1-14-037 03/31/2012 7.9E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-i-14-038 06/30/2012 5.9E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-14-039 09/30/2012 6.1 E+000 pR/h t
  • 6,OOE-001 2.5E+000 TL-1-14-040 12/31/2012 1.OE+001 pR/h t
  • 1.OOE+000 2.5E+000 TL-1-14-041 03/31/2013 6.8E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-14-042 06/30/2013 9.OE+000 pR/h t
  • 1.OOE+000 2.5E+000 TL-1-14-043 09/30/2013 5.4E+000 IR/h t
  • 6.OOE-001 2.5E+000 TL-1-14-044 12/31/2013 8.8E+000 pR/h t
  • 8.OOE-001 2.5E+000 Results marked with
  • are greater than 2 Sigma Error.

Results ma-M *Dscrimination 2el ul/r aL, e<P r~eporti ee Level Page 31 of 39

Figure 4.8 Exposure Rate Trend at TL-1-1 5 I

1A~w+

'9 1 I~s4R I ,- Result 1 Discrimination Level I Sample Name Date Collected Result 2 Sima Error Discrimination Level TL-1-15-001 03/3112003 7.IE+000 MR/h t

  • 1.62E+000 2.5E+000 TL-1-15-002 06/3012003 1.OE+001 MR/h t
  • 1.34E+000 2.5E+000 TL-1-15-003 09/3012003 8.5E+000 MR/h t
  • 8.00E-001 2.5E+000 TL-1-15-004 12/31/2003 1.OE+001 pR/h t
  • 1.08E+000 2.5E+000 TL-1-15-005 03/31/2004 8.3E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-15-006 06/30/2004 1.OE+001 pR/h t
  • 1.06E+000 2.5E+000 TL-1-15-007 09/30/2004 8.OE+000 MR/h t
  • 8.40E-001 2.5E+000 TL-1-15-008 12/31/2004 8.6E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-15-009 03/31/2005 9.1E+000 pR/h t* 9.20E-001 2.5E+000 TL-1-15-010 06/30/2005 1.1E+001 pR/h t
  • 1.06E+000 2.5E+000 TL-1-15-011 09/30/2005 1.2E+001 pR/h t* 1.18E+000 2.5E+000 TL-1-15-012 12/31/2005 9.6E+000 pR/h t* 9.60E-001 2.5E+000 TL-1-15-013 03/31/2006 1.OE+001 JR/h t* 1.04E+000 2.5E+000 TL-1-15-014 06/30/2006 9.6E+000 MR/h t
  • 9.60E-001 2.5E+000 TL-1-15-015 09/30/2006 1.1E+001 PR/ht* 1.06E+000 2.5E+000 TL-1-15-016 12/31/2006 1.2E+001 PR/h t
  • 1.16E+000 2.5E+000 TL-1-15-017 03/31/2007 9.OE+000 pR/h t
  • 9.OOE-001 2.5E+000 TL-1-15-018 06/30/2007 8.6E÷000 MR/h t
  • 860E-001 2.5E+000 TL-1-15-019 09/30/2007 7.OE+000 PR/h t
  • 7OOE-001 2.5E+000 TL-1-15-020 12/31/2007 8.1E÷000 MR/h t* 8.OOE-001 2.5E+000 TL-1-15-021 03/31/2008 1.2E+001 MR/h t
  • 1.20E+000 2.5E+000 TL-1-15-022 06/30/2008 7.9E+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-1-15-023 09/30/2008 7.1E+000 jR/h t
  • 8.OOE-001 2.5E+000 TL-1-15-024 12/31/2008 7.2E+000 PR/h t
  • 8.OOE-001 2.5E+000 TL-1-15-025 03/31/2009 9.9E÷000 PR/h t
  • 1.00E+000 2.5E+000 TL-1-15-026 06/30/2009 9.2E+000 MR/h t
  • 1.O0E+000 2.5E+000 TL-1-15-027 09/30/2009 7.6E+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-1-15-028 12/31/2009 7.3E÷000 MR/h t
  • 8.OOE-001 2.5E+000 TL-1-15-029 03/31/2010 1.1E+001 MR/h t* 1.20E+000 2.5E+000 TL-1-15-030 06/30/2010 7.3E+000 MR/h f
  • 8.OOE-001 2.5E+000 Results marked with
  • are greater than 2 Sigma Error.

Results ma~ed1 hareaterj ul/nuaJ K~ heNDiscrinination epoN Level Page 32 of 39

120"W i'GOOM dl A A-a

\,AOAV V1\1\

Result - Discrimination Level Sample Name Date Collected Result 2 Sigma Error Discrimination Level TL-1-15-031 09130/2010 7.8E+000 pR/h t

  • 8.OOE-001 2.5E+000 TL-1-15-032 12/31/2010 9.1E+000 pR/h t 1.OOE+000 2.5E+000 TL-I-15-033 03/31/2011 5.7E+000 pR/h t 6.OOE-001 2.5E+000 TL-I-1 5-034 06/30/2011 8.3E+000 pR/h t 8.OOE-001 2.5E+000 TL-I-15-035 09/30/2011 9.8E+000 pR/h t
  • 1.00E+000 2.5E+000 TL-I-1 5-036 12/31/2011 7.4E+000 MR/h t 8.OOE-001 2.5E+000 TL-I-15-037 03/31/2012 8.8E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-15-038 06/30/2012 6.9E+000 pR/h t 6.OOE-001 2.5E+000 TL-I-1 5-039 09/30/2012 7.8E+000 PR/h t 8.OOE-001 2.5E+000 TL-I-1 5-040 12/31/2012 1.2E+001 pR/h t
  • 1.20E+000 2.5E+000 TL-1-15-041 03/31/2013 7.7E+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-1-15-042 06/30/2013 1.OE+001 pR/h t
  • 1.OOE+000 2.5E+000 TL-I-15-043 09/30/2013 5.8E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-15-044 12/31/2013 9.3E+000 MJR/h t
  • 1.OOE+000 2.5E+000 Results marked with
  • are greater than 2 Sigma Error.

Results mqaj Ji ageater arhNDiscrimination Level MYZU;5*nuai r- epon Page 33 of 39

Figure 4.9 Exposure Rate Trend at TL-1-1 6 1m 1 IA*OI+

g~s~o*

qP top q1 I l-l Result - Discrimination Level I Sample Name Date Collected Result 2 Sigma Error Discrimination Level TL-1-16-001 03/31/2003 6.7E+000 lJR/h t

  • 1.22E+000 2.5E+000 TL-1-16-002 06/30/2003 1.OE+001 IjR/h t
  • 1.48E+000 2.5E+000 TL-1-16-003 09/30/2003 9.OE+000 IjR/h t
  • 1.16E+000 2.5E+000 TL-1-16-004 12/31/2003 1.1E+001 pR/h t
  • 1.16E+000 2.5E+000 TL-1-16-005 03/31/2004 8.6E+000 pR/h t
  • 9.80E-001 2.5E+000 TL-1-16-006 06/30/2004 1.OE+001 pR/h t
  • 1.14E+000 2.5E+000 TL-1-16-007 09/30/2004 8.4E+000 pR/h t
  • 1.16E+000 2.5E+000 TL-1-16-008 12/31/2004 8.8E+000 pR/h t
  • 8.80E-001 2.5E+000 TL-1-16-009 03/31/2005 8.1 E+000 pR/h t
  • 8.20E-001 2.5E+000 TL-1-16-010 06/30/2005 1.1E+001 pR/h t
  • 1.14E+000 2.5E+000 TL-1-16-011 09/30/2005 1.OE+001 pR/h t
  • 1.04E+000 2.5E+000 TL-1-16-012 12/31/2005 1.OE+001 pR/h t
  • 1.04E+000 2.5E+000 TL-1-16-013 03/31/2006 9.8E+000 pR/h t
  • 9.80E-001 2.5E+000 TL-1-16-014 06/30/2006 9.6E+000 MR/h t
  • 9.60E-001 2.5E+000 TL-1-16-015 09/30/2006 1.1E+001 pR/h t
  • 1.06E+000 2.5E+000 TL-1-16-016 12/31/2006 1.4E+001 pR/h t
  • 1.36E+000 2.5E+000 TL-1-16-017 03/31/2007 8.6E+000 pR/h t
  • 8.60E-001 2.5E+000 TL-1-16-018 06/30/2007 9.5E+000 pR/h t
  • 9.60E-001 2.5E+000 TL-1-16-019 09/30/2007 7.5E÷000 pR/h t
  • 7.60E-001 2.5E+000 TL-1-16-020 12/31/2007 8.1 E÷000 MjR/h t
  • 8.OOE-001 2.5E+000 TL-1-16-021 03/31/2008 9.9E+000 MR/h t
  • 1.OOE+000 2.5E+000 TL-1-16-022 06/30/2008 8.9E+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-1-16-023 09/30/2008 7.1E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-16-024 12/31/2008 8.5E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-16-025 03/31/2009 8.9E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-16-026 06130/2009 7.5E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-16-027 09/30/2009 6.2E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-16-028 12/31/2009 8.7E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-16-029 03/31/2010 1.1E+001 pR/h t
  • 1.OOE+000 2.5E+000 TL-1-16-030 06/30/2010 6.8E+000 pR/h t
  • 6.OOE-001 2.5E+000 Results marked with are greater than 2 Sigma Error.

Results mre1

%MV21Lwit. ratrtar Anual hDiscrimination Rteport Level Page 34 of 39

I 140"M

&ODE+=O 2~40101 Result Discrimination Level Sample Name Date Collected Result 2 Sigma Error Discrimination Level TL-1-16-031 09130/2010 8.6E+000 pR/h t

  • 8.OOE-001 2.5E+000 TL-1-16-032 12131/2010 8.2E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-16-033 03131/2011 7.2E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-16-034 06130/2011 7.8E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-16-035 0913012011 1.IE+001 pR/h t* 1.OOE+000 2.5E+000 TL-1-16-036 12131/2011 7.8E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-16-037 0/31/2012 8.8E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-16-038 06/30/2012 6.9E+000 MR/h t
  • 6.OOE-001 2.5E+000 TL-1-16-039 09/3012012 7.OE+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-16-040 1213112012 9.3E+000 MR/h t
  • 1.001E+000 2.5E+000 TL-1-16-041 03131/2013 7.7E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-1-16-042 06/30=2013 9.5E+000 MR/h t
  • 1.OOE+000 2.5E+000 TL-1-16-043 09/30t2013 5.8E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-1-16-044 1213112013 8.0E+000 pR/h t
  • 8.OOE-001 2.5E+000 Results marked with *are greater than 2 Sigma Error.

Results maAVMY 2qffi agreatergt6hDiscrimination

~l**rual K*u epon Level Page 35 of 39

Figure 4.10 nenn* Rnta Trnrl at C-nntrnl Lni-atinn TL-O.

u12*0 041(

400"~fMI Result Discrimination Level Sample Name Date Collected Result 2 Sigma Error Discrimination Level TL-O-36-001 03/31/2003 7.9E+000 pR/h t

  • 1.68E+000 2.5E+000 TL-O-36-002 06/30/2003 7.5E+000 pR/h t
  • 1.04E+000 2.5E+000 TL-O-36-003 09/30/2003 7.8E+000 pR/h t
  • 1.34E+000 2.5E+000 TL-O-36-004 12/31/2003 6.8E+000 pR/h t
  • 6.80E-001 2.5E+000 TL-O-36-005 03/31/2004 8.6E+000 JR/h t
  • 6.80E-001 2.5E+000 TL-O-36-006 06/30/2004 6.3E+000 MR/h t
  • 6.80E-001 2.5E+000 TL-O-36-007 09/30/2004 6.1E+000 MR/h t
  • 5.60E-001 2.5E+000 TL-0-36-008 12/31/2004 6.IE+000 pR/h t
  • 4.80E-001 2.5E+000 TL-O-36-009 03/31/2005 8.1E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-0-36-010 06/30/2005 8.7E+000 pR/h t
  • 8.60E-001 2.5E+000 TL-O-36-011 09/30/2005 1.OE+001 MR/h t
  • 1.OOE+000 2.5E+000 TL-O-36-012 12/31/2005 8.OE+000 MR/h t
  • 8.00E-001 2.5E+000 TL-O-36-013 03/31/2006 6.6E+000 MR/h t
  • 6.60E-001 2.5E+000 TL-O-36-014 06/30/2006 7.7E+000 MR/h t
  • 7.60E-001 2.5E+000 TL-O-36-015 09/30/2006 7.2E+000 MR/h t
  • 7.20E-001 2.5E+000 TL-O-36-016 12/31/2006 1.1E+001 MR/h t
  • 1.12E+000 2.5E+000 TL-O-36-017 03/31/2007 6.8E+000 MR/h t
  • 6.80E-001 2.5E+000 TL-O-36-018 06/30/2007 7.2E+000 MR/h t
  • 7.20E-001 2.5E+000 TL-O-36-019 09/3012007 7.3E+000 MR/h t* 7.20E-001 2.5E+000 TL-O-36-020 12/31/2007 6.8E+000 MR/h t
  • 6.80E-001 2.5E+000 TL-O-36-021 03/31/2008 7.6E+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-O-36-022 06/30/2008 5.9E+000 MR/h t
  • 6.OOE-001 2.5E+000 TL-O-36-023 09/30/2008 5.1E+000 MR/h t* 6.OOE-001 2.5E+000 TL-O-36-024 12/31/2008 6.3E+000 MR/h t
  • 6.OOE-001 2.5E+000 TL-O-36-025 03/31/2009 6.6E+000 MR/h t
  • 6.OOE-001 25E+000 TL-O-36-026 06/30/2009 6.5E+000 MR/h t
  • 6.OOE-001 2.5E+000 TL-O-36-027 09/30/2009 5.8E+000 MR/h t
  • 6.OOE-001 2.5E+000 TL-O-36-028 12/31/2009 5.9E+000 ,R/h t* 6.OOE-001 2.5E+000 TL-O-36-029 03/31/2010 7.4E+000 MR/h t* 8.OOE-001 2.5E+000 TL-O-36-030 06/30/2010 5.OE+000 MR/h t
  • 6.OOE-001 2.5E+000 Results marked with
  • are greater than 2 Sigma Error.

%MV26U1. a rtual Results mawlhe rohi9e t~ ~ KepoN rhDiscnimination Level Page 36 of 39

120"OM V00o1+M 2AlOs.~

$ 40 / 'p I I - Result - Discrimination Level I Sample Name Date Collected Result 2 Sigma Error Discrimination Level TL-0-36-031 0913012010 5.2E+000 pR/h t

  • 6.OOE-001 2.5E+000 TL-0-36-032 12/31/2010 6.4E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-0-36-033 03/31/2011 6.7E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-0-36-034 06/30/2011 6.2E+000 MR/h t
  • 6.OOE-001 2.5E+000 TL-0-36-035 09/30/2011 7.7E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-0-36-036 12/31/2011 7.1E+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-0-36-037 03/31/2012 7.5E+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-0-36-038 06/30/2012 5.2E+000 pR/h t
  • 6.OOE-001 2.5E+000 TL-0-36-039 09/30/2012 5.9E+000 MR/h t
  • 6.OOE-001 2.5E+000 TL-0-36-040 12/31/2012 7.7E+000 pR/h t
  • 8.OOE-001 2.5E+000 TL-0-36-041 03/31/2013 5.7E+000 MR/h t
  • 6.OOE-001 2.5E+000 TL-0-36-042 06/30/2013 7.6E+000 MR/h t
  • 8.OOE-001 2.5E+000 TL-0-36-043 09/30/2013 7.OE+000 MR/h t
  • 6.OOE-001 2.5E+000 TL-0-36-044 12/31/2013 7.1E+000 pR/h t
  • 8.OOE-001 2.5E+000 Results marked with
  • are greater than 2 Sigma Error.

Results mqAt MYZU*/r~ual 2fhae retjer IlU Discnriination epoR Level Page 37 of 39

8.0 ANALYSIS OF ENVIRONMENTAL RESULTS 8.1 Sampling Program Deviations A sampling program deviation is defined as samples that are unobtainable due to hazardous conditions or to malfunction of sampling equipment. Such deviations do not compromise the program's effectiveness and in fact are considered insignificant with respect to what is normally anticipated for this Radiological Environmental Monitoring Program.

Two deviations of the sampling requirements occurred during this monitoring period. Two 4 th quarter TLDs; TL-1-06 and TL-O-36, were damaged by water and ice resulting in no data. The 4 th quarter doses at TL-1-06 from 2009 through 2012 were reviewed. The four year average dose at TL-1-06 in the 4 th quarter is 0.16 mrem. Adding this value to replace the missing data would result in a total dose at TL-1-06 for 2013 equal to 1.31 mrem. Missing data from the control TLD; TL-O-36, did not impact the calculation of the 4th quarter dose because a second TLD was in place at the same location and undamaged.

5.2 Direct Radiation Pathway 5.2.1 Exposure Rates Direct radiation is continuously measured at 9 indicator locations surrounding the Maine Yankee ISFSI, along with 1 control location (Wiscasset Fire Station) using thermoluminescent dosimeters (TLDs). These dosimeters are collected every calendar quarter for readout at the NVLAP certified dosimetry services vendor.

Review of the data in Tables 4.2 and 4.3 shows that most indicator locations were slightly elevated in comparison to the control location exposure rates.

Figures 4.1 through 4.10 provide exposure rate trends of the monitoring locations since 2003. Review of Figures 4.1 through 4.10 shows no significant difference in exposure rates over time at either the indicator or control locations. The data listed under each of the trend graphs show values for the result errors and discrimination levels. Note that these values are estimated and are shown only for information.

5.2.2 Direct Doses from ISFSI Operations A dose estimate is the potential dose to any real member of the public that could MY 2013 Annual REO Report Page 38 of 39

use portions of the site or be present adjacent to the site for recreational activities throughout the year. Direct exposure above background can be estimated by subtracting the average TLD value of the control station from the indicator location measurements. As in previous years, the 2013 dose estimate assumes a total of 325 hours0.00376 days <br />0.0903 hours <br />5.373677e-4 weeks <br />1.236625e-4 months <br /> occupancy for the dose calculation; of which 32.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> are used in both the first and fourth quarters and 130 hours0.0015 days <br />0.0361 hours <br />2.149471e-4 weeks <br />4.9465e-5 months <br /> are used in both the second and third quarters. The most likely location for exposure to a member of the public from the ISFSI is along the Back River, Bailey Cove or Montsweag Bay for boating and fishing and the mud flats in the Cove or Bay exposed at low tides which is worked by clam diggers and worm diggers; however, the time estimates are conservatively applied to all monitoring locations.

Table 4.4 presents the results of the dose calculations. The highest calculated dose is at Station ID number TL-I-06. The maximum calculated annual dose at that location is 1.15 mrem. Adding in the four year average 4 th quarter dose of 0.16 mrem as a substitute for the missing data, results in a total dose of 1.31 mrem. This value is only 5 percent of the 25 mrem per year limit. It is noted that most of the mud flat region in Bailey Cove that is used by the public is situated further away from this Station. As a result, actual exposures from direct radiation would be much less than the maximum calculated value.

6.0 REFERENCES

1. USNRC Radiological Assessment Branch Technical Position, "An Acceptable Radiological Environmental Monitoring Program," Revision 1, November 1979.
2. Maine Yankee Off-site Dose Calculation Manual, Revision 34.
3. 40 CFR Part 190, "Environmental Radiation Protection Standards for Nuclear Power Operation".
4. 10 CFR Part 72.104, "Criteria for Radioactive Materials in Effluents and Direct Radiation from an ISFSI or MRS".

MY 2013 Annual REO Report Page 39 of 39

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