ML092570347

001 FSS Final Report 5, Rev. 1

ML092570347
Person / Time
Site:	Rancho Seco
Issue date:	09/01/2009
From:	Sacramento Municipal Utility District (SMUD)
To:	NRC/FSME
References
DPG 09-262
Download: ML092570347 (38)

Text

RANCHO SECO FSS FINAL REPORT Final Status Survey Report 5 Rev. 1 September 1, 2009

FSS FINAL REPORT Final Status Survey Report 5 1.0 Overview As discussed in Section 1.4 of the Rancho Seco License Termination Plan (LTP), SMUD intends to release the Rancho Seco site for unrestricted use in two phases, with the license being terminated after completion of the second phase. The first phase includes the release of the majority of the site, including impacted and non-impacted areas, except for the Interim Onsite Storage Building (IOSB) and the area immediately surrounding it. All radioactive material is now stored within the boundaries of the IOSB facility. All areas included in the first phase have been verified as ready for release and no additional surveys of these areas will be required.

SMUD will continue to store Class B & C radioactive waste in the IOSB until an acceptable disposal facility becomes available. After disposing of the Class B & C radioactive waste, SMUD will complete the final status survey for the remainder of the site (i.e., the IOSB and area immediately surrounding it) and will submit a license amendment request to terminate the 10 CFR Part 50 license and release the remainder of the site for unrestricted use. The spent nuclear fuel and the Greater than Class C (GTCC) waste are stored at the Rancho Seco Independent Spent Fuel Storage Installation (ISFSI),

which is licensed under 10 CFR Part 72, independent of the 10 CFR Part 50 licensed site.

Section 1.4 of the LTP discusses the information to be provided to support release of land from the Rancho Seco 10 CFR Part 50 license. The information provided in this report includes a discussion of dismantlement activities performed, final status survey results, and an evaluation of the potential for re-contamination and controls applied to prevent this for each survey unit completed.

The information contained in this submittal will be sufficient for the NRC to conclude that, for the land and structures associated with the release, dismantlement has been performed in accordance with the approved license termination plan, and the terminal radiation survey and associated documentation demonstrates that the facility and site are suitable for release in accordance with the criteria for decommissioning in 10 CFR Part 20, Subpart E by meeting a site release criterion of 25 millirem TEDE per year over background.

Once these lands and structures are released, no additional surveys or decontamination of these areas will be required unless the NRC determines that the criteria of 10 CFR Part 20, Subpart E were not met.

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2.0 Site Information and Physical Description 2.1 Physical Description of Land or Structures to be Released The land and structures to be released will be described in the application for license amendment and is unchanged by this submittal.

2.1.1 Survey Unit Information Included in This Submittal As discussed in section 1.0 above, this submittal provides detailed discussion on demolition activities completed and final status survey results for 97 survey units located on the site to be released.

Details are provided for each survey unit on survey methods, results, data analysis, and conclusions. In all cases, Rancho Seco is providing a complete package of information relating to each survey unit so that the NRC staff can verify that the License Termination Plan has been fully implemented for each survey unit and that the final status survey results support unrestricted release of the land from License DPR-54 in accordance with the proposed license amendment.

This submittal addresses dismantlement and FSS information for survey units associated with the 5010051, 800007, 800009, 800010, 810000, 811000, 812000, 813000, 814000, 826000, 834000, 837000, 851000, and 899000 areas. Table 1 provides a description of the survey units addressed in this submittal.

Table 1 Survey Unit Class General Description of Survey Unit F5010051 3 5010051 - Access Road Area consists of the access road in the Northeast quadrant of the site. The access road provided the route over which radioactive shipments were made. The roadway was also adjacent to areas used for staging outgoing and incoming radioactive material shipments located on the south side of the industrial area of the site. The area is 9,210 m2.

F8000072,3 3 8000072 - Industrial Area (IA) West of Barrel Farm -

This area is located on the west side of the Industrial Area to the north of the retention basins and south of the IOSB.

Due to the potential of ~ 700 square meters west of the historic location of the barrel being omitted from survey coverage in survey units 8000071 and 8000121 the survey unit was added. Survey Unit 800073 is located on the west side of the Industrial Area to the north of the spray ponds. Specifically, ~ 250 square meters adjacent to the NW corner of the current IA security fence was potentially omitted from survey coverage in F8000071 and F8000141. The survey unit areas are 696 and 255 m2 respectively.

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Table 1 Survey Unit Class General Description of Survey Unit F8000091 3 8000091 - South East I A Lands - This area covers a majority of the Industrial Area soils exclusive of the building footprints and rail line in this area and consist primarily of soils and some asphalt. The area was 55,736 m2.

F8000101,2 3 8000101,2 - IA Central Yard- The IA Yard consisted of both paved and unpaved area located adjacent to the machine shop and Warehouse A. The area is 3387 m2.

F8000104-6 1&2 8000104 - Pump alley Access Corridor consists of the asphalt pavement between the Auxiliary Building and the T&R building. 8000105 - IA roadway running north and south from the T&R to the intersection with the site exit road east of the solidification pad and RB. 8000106-Central IA Roadways and paved areas beginning with the roadway in front of and north of the maintenance shop, west to Warehouse B and east to the end of the north Laydown area. The survey unit areas are 248, 1,696 and 3,680 m2.

F8000111 2 8000111- IA Central, East-West Corridor and Fab Shop Slab, consist of paved footprint of the Fab Shop and the corridor along Warehouse B. The survey unit area is 1,086 m2.

F8000142 3 8000142- Northern IA Paved Surfaces consists of the paved portions of the land area that extends from the northern industrial area security fence south to the pavement surrounding the cooling towers in the south and from the eastern IA security fence at the sally port to approximately 100 feet west of the west spray pond. The survey unit area is 29,138 m2.

F8080031-3 2 8080031 Cooling Tower Buffers, South West and East. The cooling towers and basins were part of the condenser cooling water system. The paved buffer regions consist of survey unit areas of 7,500, 5,547 and 6,481m2.

810000 1,2 & 3 810000 consist of the surface and subsurface soil units and paved areas of the Tank Farm and Steam Sump. It also includes the concrete pads remaining for the CST, DRCST, DWST and Tritium Evaporator. The total area for the survey units in this submittal is 6,350 m2.

8110000 Interior 8110000 Reactor Containment consist of the interior Class 1, walls and floor of the Reactor Building. The interior Class 3 for concrete walls are covered with 0.25 inch carbon steel Containment liner. The floor consists primarily of concrete (liner plate Exterior and removed). The Building exterior and Tendon Gallery Tendon consists of concrete. The total area for all the survey Gallery units in this submittal is 14,727 m2.

F812000 Class 1 floor, 812000 Fuel Building- The Fuel Building contained the lower walls, spent fuel storage pool and the floor area and upper walls Class 2 upper surrounding the pool. The surveys presented in this walls, ceiling, submittal are for the following locations: pool floor; N, S, Class 3, Exterior E, W pool walls; CR pit; El.40 floor; lower and upper walls; Styrofoam' gap; and exterior surfaces. The total area for all the survey units in this submittal is 4,256 m2.

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Table 1 Survey Unit Class General Description of Survey Unit F813000 Class 1 floor, 813000 Auxiliary Building- The Auxiliary Building lower walls, contained the systems used to transport, process and Class 2 upper contain radioactive solids, gases and liquids. The surveys walls, ceiling, presented in this submittal are for the following rooms Class 3 Exterior located on the -47, -20, +20, +40 and grade elevation:

Walls 01 02,51e,109,132,208,211,309-317,350, Exterior Steam Support Structure, East and North exterior walls. The total area for all the survey units in this submittal is 4,920 m2.

F8140003 3 8140003 - T&R, AB, NSEB +40 Bridge consists of the access corridor between the Training and Records Building, Auxiliary Building, and Nuclear Service Electrical Building at the + 40 elevation. The survey unit area is 431 m2.

F826000 1, 2, 3 826000 Turbine Building submittals in this report consist of the below grade surface, grade level, mezzanine, 40 elevation, Interior and exterior walls. The surfaces consist of steel, concrete and asphalt. The survey units are noted in Table 2 of this submittal. The area is 17,820 m2.

F834000 1, 2 & 3 8340011 - The IA Railway was used to transport radioactive material from the site to the out of state waste disposal facilities. This Class 1 survey unit is 100 m2 and was established based on discovery of a small area (<1 m2) of contaminated asphalt adjacent the Turbine Building. 8340012 - IA Railway consists of the 4,735 m2 Class 2 survey unit region extending from the Turbine Building to the IA fence line. 8340021 consist of the rail area external to the IA. This Class 3 survey unit is 5,990 m2.

F8370001,2 1 8370001,2 RHUT, Aux Boiler Pad- 8370001, the RHUT, Aux Boiler Pad encompassed the area where the A and B RHUTs were located and includes the area that contained the foundation pad for the auxiliary boiler. The area consists of the soils, concrete pad, and the surrounding gravel area above the RHUT pipes. The area is 1819 m2.

8370002 is the subsurface soil in the same region.

F8510005 3 8510005 consisted of both paved and soil covered land.

The area was located on the west side of the IA. The region is south of the switchyard and extends along the north side of the roadway from the switchyard entrance on the east and around the retention basins to the west.

The total area is 7,913 m2.

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Table 1 Survey Unit Class General Description of Survey Unit F8990000 1,2 The following Survey Units are included in this submittal piping systems:

8990074 - Turbine Pedestal Drains originate on the Turbine Building +40 El. and the Class 1 survey unit consists of 8 m2of piping.

8990098 - Clean Drain System C Hold-Up tank Cross-Tie consist of the land region where the piping was removed. The Class 2 survey unit total area is 100 m2.

8990111 - Decay Heat Drain Lines Reactor Building originated in the Reactor Building and terminated in the Aux. Building The Class 1 survey unit consist of 49 m2.

8990401 - Reactor Building Drains provided an alternate pathway for delivering feed water to the steam generators. The Class 1 survey unit contains 12 m2 of piping.

8990441 - Fuel Pool Piping System transported radioactive fuel pool water through the coolers and clean-up demineralizers. The associated piping in this Class 1 survey unit consists of 38 m2.

8991093 - RHUT 8 Lines provided an alternate pathway for delivering feed water to the steam generators. This Class 2 survey unit contains 110 m2 of trenched land area resulting from the removal of the system piping.

The locations of the survey areas listed in Table 1 above are shown in Fig. 1.

2.1.2 Survey Unit Information Being Provided in Subsequent Submittals This submittal is the last submittal of survey unit information and no additional submittals are anticipated.

2.2 Dismantlement Activities The Rancho Seco License Termination Plan describes the dismantlement activities to be performed for each area and applicable structure of the Rancho Seco site consistent with the use of the Building Occupant scenario. In general, the LTP indicates that temporary structures will be demolished and that permanent structures will be left standing following final survey. In addition, the ISFSI and IOSB structures will remain. During the period of time represented by this submittal, all remediation and dismantlement activities were completed.

3.0 Technical Evaluation 3.1 Potential for Cross-Contamination from Subsequent Activities Since decommissioning activities were conducted onsite in parallel with final status survey and release decisions, measures were taken to protect survey areas from contamination during and subsequent to the final status survey. Rancho 6

Seco LTP sections 3.3.5 and 5.2.4 describe contamination and access control measures and periodic routine monitoring practices to prevent and/or detect re-contamination of survey areas during or following FSS. These requirements are implemented, as appropriate, through established procedures as described in the LTP.

The potential for re-contamination and the contamination controls/monitoring for the specific survey areas included in this release phase are discussed and evaluated below:

3.1.1 5010051 Access Road This area consists of the access road in the Northeast quadrant of the site. It was successfully surveyed as a Class 3 area. No remediation was required.

3.1.2 8000072 Industrial Area West of Barrel Farm This area is located on the west side of the Industrial Area (IA) to the north of the retention basin and south of the IOSB. Because of potential disparities between survey unit maps this survey unit was established to insure the region was adequately addressed. It was successfully surveyed as a Class 3 area. No remediation was required.

3.1.3 8000073 Industrial Area West (north end)

This area is located on the west side of the Industrial Area to the north of the spray ponds. Because of potential disparities between survey unit maps this survey unit was established to insure the region was adequately addressed. It was successfully surveyed as a Class 3 area. No remediation was required.

3.1.4 8000091 South East Industrial Area Lands This survey unit includes a majority of Industrial Area soil exclusive of building footprints and rail line. The Class 3 region consists of soil and asphalt. Because of activities associated with the removal of concrete from the Reactor Building verification surveys were perform in this area. The final survey for this Class 3 survey unit was successful. No remediation was required. No additional activity was observed during routine verification surveys.

3.1.5 8000101,2 Industrial Area Central Yard This Class 3 region consists of paved and unpaved areas located adjacent to the machine shop and Warehouse A. Due to activities associated with Reactor Building concrete removal periodic surveillance was maintained to detect any potential re-contamination. In addition, verification surveys were performed in 7

these survey units following completion of Reactor Building activities. No additional activity was observed during the verification surveys.

3.1.6 8000104 Pump Alley Access Corridor The Pump Alley Access Corridor was successfully surveyed as a Class 1 area. No remediation was required. No radioactive material is allowed in the area.

3.1.7 8000105 Industrial Area Roadway This roadway runs north and south from the T&R Building to the intersection of the site exit road east of the solidification pad and BWB. Reactor Building concrete removal resulted in transport of radioactive material over this region. Periodic surveillance surveys were performed in this region prior to the final survey and no potential contamination was observed. The final survey for this Class 2 area was successful. No remediation was required.

3.1.8 8000106 Central Industrial Area Roadways This region begins with the roadway in front of the Maintenance Building, west to Warehouse B and east to the end of the North Laydown area. Reactor Building concrete removal resulted in transport of radioactive material over this region. Periodic surveillance surveys were performed in this region prior to the final survey and no potential contamination was observed. The final survey for this Class 2 unit was successful.

3.1.9 8000111 Central East-West Corridor and Fab Shop Slab This Class 2 region consists of the paved footprint of the Fab Shop and the corridor along Warehouse B. The final survey for this survey unit was successful and no remediation was required.

3.1.10 8000142 North Industrial Area Paved Surfaces This Class 3 survey unit consists of the paved portions of the land area that extends from the northern Industrial Area security fence south to the pavement surrounding the cooling towers in the south and from the eastern IA security fence at the sally port to approximately 100 feet west of the west spray pond. Final survey of this survey unit was successful and no remediation was required. Periodic surveillance was conducted over portions of the south roadway in this area during Reactor Building remediation and concrete removal and no additional activity was observed.

3.1.11 8080031-33 Cooling Tower Buffers South, West and East These Class 2 survey units consist of the pavements that surround the cooling towers. During Reactor concrete removal transport 8

containers were located in some of these regions. Periodic surveillance was conducted over portions of the survey unit. The final surveys for these survey units were successfully performed following completion of the Reactor Building work and no remediation was required.

3.1.12 8100000 Tank Farm and Steam Sump Areas This region consists of the surface and subsurface soil and paved areas of the Tank Farm and Steam Sump. It includes the concrete pads remaining for the CST, DRCST DWST and Tritium Evaporator. Due to remediation and concrete removal activities periodic surveys were conducted in these areas prior to conducting the final surveys. Some of these surveys resulted in the discovery of discrete particles that were principally concrete chips that were suspected to have originated from remediation activities inside the Spent Fuel and the Reactor Buildings. The final surveys for these areas were conducted following completion of the nearby remediation activities and resulted in several local area investigations but resulted in successful final surveys.

3.1.13 8110000 Reactor Containment, Exterior Walls and Tendon Gallery The Reactor Containment interior surfaces were Class 1 survey units. Following remediation of the surfaces, removal of liner plate from the floor, and removal of the normal sump liner and steel support plate for the emergency sump decay heat piping, final surveys and local area investigation were successfully performed.

The activated concrete region of the containment was also remediated to a depth of about 30 cm and the final survey for this region was successful. The Class 3 survey units consisted of the Reactor Building exterior and the Tendon Gallery. These regions required no remediation and the final surveys were successful.

3.1.14 812000 Fuel Building The survey units associated with this submittal consist of the pool floor, north, south, east and west pool walls, CR pit, floor lower and upper walls of the 40 elevation, Styrofoam' gap and exterior surfaces. The Fuel Building required extensive remediation in the spent fuel pool area. The pool was isolated and extensive contamination controls were applied. Periodic surveillance of regions adjacent to the above areas was conducted during remediation activities. Verification surveys were conducted following final survey activities on the +40 elevation Fuel Building floors. The final surveys for the pool survey units and fuel building proper were successful. Final surveys for the Styrofoam' gap and exterior building surfaces were successful.

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3.1.15 813000 Auxiliary Building The rooms in zones 1-6 of the Auxiliary Building surveys are some of the most contaminated site areas. The survey units in these zones are all classified at least Class 2 for upper walls/ceilings with floors being at least Class 2 but usually Class 1. Most of the lower walls and floors required some concrete remediation. When remediation was ongoing in adjacent areas, through-wall penetrations were covered, drain pipe openings were plugged, strict access controls were maintained and the areas were subject to periodic surveillance to check for potential re-contamination.

Portions of zones 7-12 are Class 2 or 3 with little potential for re-contamination and the controls were somewhat less rigorous.

Following the successful completion of final surveys, verification surveys were conducted of the penetrations into the Reactor Building, the hallway to the Turbine Building, elevators, grade level areas, +20 elevation hallways, +40 elevation Personnel Equipment Hatch and grade level Steam Support Sump area. All verification surveys were successfully completed and no additional contamination was observed.

3.1.16 8140003 Training and Records, Auxiliary and NESB +40 Bridge This survey unit is the access corridor between the T and R Building, auxiliary Building and Nuclear Service Electrical Building at the +40 elevation. The final survey was successful.

3.1.17 8260000 Turbine Building The survey units submitted consist of the below grade surfaces of the condenser and lube oil pits, grade level, mezzanine, 40 elevation, interior and exterior walls. The Turbine Building was successfully remediated and surveyed. Verification surveys were performed for the northeast grade level, south grade level, South exit area and north end of the +40 elevation Turbine Deck. All verification surveys were successful. No radioactive material is allowed in the area.. The area was placed under periodic surveillance to detect any potential re-contamination and no additional contamination was observed.

3.1.18 834000 Industrial Area Railway and Railway External to the IA The survey units for the railway include Class 1, Class 2, and Class 3 survey units. A Class 1 region was designated where characterization surveys identified a small area of contaminated asphalt immediately west of the Turbine Building. The survey unit for the Class 2 region extends from near the edge of the Turbine Building to the Industrial Area fence line. Due to Reactor Building concrete remediation activities this region was subjected to periodic surveillance to detect any potential contamination prior to 10

conducting the final surveys. The Class 3 survey unit consisted of the region external to the IA. The final surveys in these areas were all successfully performed following completion of the Reactor Building remediation activities.

3.1.19 8370001,2 RHUT, Aux Boiler Pad The RHUT, Aux Boiler Pad region final survey was successfully completed. Subsequent surveys by ORISE representatives identified a discrete particle (concrete chip) just inside the boundary of this survey unit. This finding resulted in the examination of all potential areas associated with removal of Reactor Building concrete to be examined by scan survey and the institution of more rigorous controls. Because it was highly likely the chip originated from transport of supersacks of contaminated concrete along the roadway adjacent to this survey unit, additional measures involving periodic surveys of roadways and storage areas were instituted. The 8370002 survey unit is associated with subsurface soils and the final survey was successful. Following completion of the removal and transport of contaminated concrete from the Reactor Building a verification survey was successfully completed and no additional activity was observed.

3.1.20 8510005 Switchyard South and Retention Basin Buffer Investigations of survey unit boundaries were conducted to confirm all survey units had sufficient overlap and that no regions were missed. Because of potential disparities between survey unit maps this survey unit was established to insure regions of the Switchyard, Helo pad and Retention Basin were adequately addressed. The Class 3 survey unit final survey was successful and no remediation was required.

3.1.21 899000 Buried or Embedded Piping Systems The pipe remaining on site is surveyed and grit blasted, if necessary, to remove surface contamination. Once final surveys are complete, the pipes are plugged to prevent recontamination or, if necessary, grouted in place. There is little likelihood that piping will become re-contaminated following final survey. In addition, the rooms containing access to the pipes are placed under periodic surveillance to detect any potential re-contamination once FSS is complete. Some of these survey units are trenches resulting form the removal of buried piping systems. All final surveys for these survey units were successful.

4.0 Final Status Survey Report Rancho Seco LTP section 5.7.3 identifies the contents of the written reports of final status survey results that are to be submitted to the NRC. The contents include the 11

items described in NUREG-1757, Vol. 2, Section 4.5. The survey unit design details and results are provided below in summary fashion. Specific survey unit design details and results are provided in a copy of each survey unit summary report in Attachment I of this submittal.

4.1 Overview of Results The survey units included in this report are listed in Table 2 with the exception of five revised reports which are listed is Section 4.6 of this report.

The summary report for each survey unit contains a description of the survey unit; design information, including classification, size, number of measurements, map, scan coverage, and DCGL; survey results; survey unit investigations (anomalous data); data assessment results, including statistical evaluations, if applicable; changes in initial survey unit assumptions on extent of residual activity, an evaluation of LTP changes subsequent to the FSS of the survey unit and survey unit conclusions.

Overall, the attached survey unit summary reports demonstrate that the survey units meet the criteria for release for unrestricted use in accordance with the NRC approved Rancho Seco License Termination Plan.

4.2 Discussion of Changes to FSS Program The purpose of this section is to discuss changes to the FSS program. There were no changes made to the FSS Program that impacted the final surveys.

4.3 Final Status Survey Methodology This section summarizes the implementation of the LTP Final Status Survey methodology for the survey units that are included in this first report supporting the release of remaining non-ISFSI and non-IOSB land. Table 2 provided below lists the key FSS design features for each survey unit. These design features include the survey unit classification and size, the standard deviation and Lower Boundary of the Gray Region (LBGR) used for determining the number of direct measurements taken, the percent scan coverage, the design DCGLEMC and the number of measurements required.

This report covers only structures for which the DCGL is 43,000 dpm/100 cm2 (16,000 dpm/100 cm2 for special areas). The buried and embedded pipe DCGL is 100,000 dpm/100 cm2 and soil or paved areas have a DCGL of 52.6 pCi/g Cs-137surrogate and 12.6 pCi/g Co-60. The DCGL for activated concrete is a Eu-152surrogate value of 7.7 pCi/g. The standard deviations listed were obtained from site characterization data or survey unit specific measurements. The Type 1 and 2 Errors are the default values of 0.05 and the LBGR is initially based on 50% of the DCGL.

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Table 2 Survey Unit Design Parameters Survey Survey Standard Design Number of  %

Class Unit LBGR Units Unit ID Deviation DCGLEMC Measurements Scan Size m2 F5010051 Site Access Roadway Ci 1 3 9,210 0.032 25.6 N/A 14 10.0 g

F8000072 Industrial Area West (West of Barrel Farm)

Ci 2 3 696 0.034 25.6 N/A 14 5.0 g

F8000073 Industrial Area West (North End)

Ci 3 3 255 0.034 25.6 N/A 14 11.8 g

F8000091 South East Industrial Area Ci 1 3 55,736 0.042 25.6 N/A 14 4.2 g

F8000101 Industrial Area Central Yard, North and East of Maintenance Building Ci 1 3 1,587 0.01 25.6 N/A 14 32.0 g

F8000102 Industrial Area Central Yard, North and West of Maintenance Building Ci 2 3 1,800 0.01 25.6 N/A 14 23.0 g

F8000104 Pump Alley Access Corridor Ci 4 1 248 0.57 49.5 97.8 14 100.0 g

F8000105 Industrial Area, North-South Roadway East of BWB Ci 5 2 1,696 0.57 25.6 N/A 14 41.3 g

F8000106 Central Industrial Area Roadway Ci 6 2 3,680 3.90 39.5 N/A 14 21.3 g

F8000111 Industrial Area Corridor, North of A Warehouse and Fab Shop Ci 1 2 1,086 0.07 25.6 N/A 14 57.3 g

F8000142 North Industrial Area Ci 2 3 29,138 0.073 25.6 N/A 14 10.0 g

F8080031 Cooling Tower Buffer South Ci 1 2 7,500 0.92 25.6 N/A 14 20.0 g

F8080032 Cooling Tower Buffer West Ci 2 2 5,547 0.92 25.6 N/A 14 20.4 g

F8080033 Cooling Tower Buffer East Ci 3 2 6,481 0.92 25.6 N/A 14 20.1 g

F8100011 Tank Farm Southwest and Steam Sump (surface)

Ci 1 1 672 10.7 25.6 74.2 15 100.0 g

F8100012 Tank Farm Southwest and Steam Sump (subsurface)

Ci 2 1 672 10.7 25.6 74.2 15 0.0 g

F8100021 Tank Farm NW Quadrant (surface)

Ci 1 1 1,618 10.7 25.6 63.0 15 100.0 g

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Survey Survey Standard Design Number of  %

Class Unit LBGR Units Unit ID Deviation DCGLEMC Measurements Scan Size m2 F8100022 Tank Farm NW Quadrant (subsurface)

Ci 2 1 1,618 10.7 26.3 63.0 15 0.0 g

F8100031 Tank Farm NE Quadrant (surface)

Ci 1 1 1,942 10.7 25.6 61.5 15 100.0 g

F8100032 Tank Farm NE Quadrant (subsurface)

Ci 2 1 1,942 10.7 25.6 61.5 15 0.0 g

F8100041Tank Farm CST and #2 & #3 Pads dpm/100 1 1 195.1 7,614 21,500 152,901 28 100.0 cm2 F8100042 Tank Farm DRCST Pad dpm/100 2 2 177.4 73.0 21,500 N/A 14 47.0 cm2 F8100043 Tank Farm BWST Pad dpm/100 3 1 187 12,845 21,500 153,669 27 100.0 cm2 F8100044 Tank Farm Tritium Evaporator Pad dpm/100 4 2 148 167 21,500 N/A 14 36.0 cm2 F8100051 Tank Farm Trench 1 Ci 1 3 750 0.095 26.3 N/A 14 100.0 g

F8100052 Tank Farm Trench 1 (surface)

Ci 2 1 660 0.10 26.3 79.0 14 100.0 g

F8100053 Tank Farm Trench 1 (subsurface)

Ci 3 2 660 0.10 25.6 N/A 14 0.0 g

F8110111 Rx Building FSS Ring (+75 to +115) dpm/100 1 1 1,966 33,040 21,500 640,700 65 100.0 cm2 F8110112 Rx Building FSS Ring (+25 to +75) dpm/100 2 1 1966 33,040 21,500 640,700 65 100.0 cm2 F8110113 Rx Building FSS Ring (-27 to +25) dpm/100 3 1 1,762 33,040 21,500 640,700 65 100.0 cm2 F8110114 Rx Building Floor -27 dpm/100 4 1 1,125 31,920 21,500 640,700 65 100.0 cm2 F8111591 Rx Building Tendon Gallery dpm/100 1 3 1,817 119 21,500 N/A 14 20.0 cm2 F8113000 Rx Building Exterior Dome dpm/100 0 3 575 119 21,500 N/A 14 3.0 cm2 F8113001 Rx Building Exterior dpm/100 1 3 5,516 119 21,500 N/A 14 21.0 cm2 F8120001 Spent Fuel Pool West Wall dpm/100 1 1 185.9 12,246 21,500 154,800 27 100.0 cm2 14

Survey Survey Standard Design Number of  %

Class Unit LBGR Units Unit ID Deviation DCGLEMC Measurements Scan Size m2 F8120002 Spent Fuel Pool South Wall Dpm/100 2 1 137.7 12,246 21,500 154,800 20 100.0 cm2 F8120003 Spent Fuel Pool East Wall dpm/100 3 1 206.6 12,246 21,500 154,800 17 100.0 cm2 F8120004 Spent Fuel Pool North Wall dpm/100 4 1 267.0 12,246 21,500 154,800 39 100.0 cm2 F8120005 Spent Fuel Pool Floor dpm/100 5 1 175.2 12,246 21,500 154,800 26 100.0 cm2 F8120121 Spent Fuel Building Exterior dpm/100 1 1 122.5 747 40,759 154,800 18 100.0 cm2 F8120141 Spent Fuel Building Exterior dpm/100 1 3 854 747 40,759 N/A 14 28.0 cm2 F8120171 Spent Fuel Building Styrofoam Gap dpm/100 1 2 305 747 21,500 N/A 14 47.0 cm2 F8120181 Spent Fuel Building Styrofoam Gap dpm/100 1 1 50.0 4,631 21,500 236,500 14 100.0 cm2 F8121001 Spent Fuel Building Floor 40 El.

dpm/100 1 1 272 4,631 21,500 154,800 39 100.0 cm2 F8121002 Spent Fuel Building 40 El. Lower Walls, North dpm/100 2 1 245 4,631 29,107 141,900 35 100.0 cm2 F8121003 Spent Fuel Building 40 El. Lower Walls, South dpm/100 3 1 115.8 4,631 29,107 146,200 17 100.0 cm2 F8121004 Spent Fuel Building 40 El. Upper Walls, South dpm/100 4 2 839.9 4,631 29,107 N/A 14 68.7 cm2 F8121005 Spent Fuel Building Control Rod Pit dpm/100 5 3 33.4 149 42,553 N/A 14 9.0 cm2 F8121006 Spent Fuel Building 40 El. Upper Walls, North dpm/100 6 2 446.1 4,631 29,107 N/A 14 55.0 cm2 F8130022 Aux. Building -47 El. Room 1, Ceiling dpm/100 2 1 95.0 9,976 21,500 162,540 15 100.0 cm2 F8130041 Aux. Building -47 El. Room 2, Upper Walls dpm/100 1 1 239.5 9,976 21,500 152,220 35 100.0 cm2 F8130731 Aux. Building Room 51e dpm/100 1 1 142 12,035 21,500 154,800 21 100.0 cm2 F8130942 Aux. Building Room 109 dpm/100 2 1 12.0 6,935 21,500 735,730 14 100.0 cm2 15

Survey Survey Standard Design Number of  %

Class Unit LBGR Units Unit ID Deviation DCGLEMC Measurements Scan Size m2 F8131211 Aux. Building Room 132 dpm/100 1 2 995 6,935 21,500 N/A 14 16.0 cm2 F8131212 Aux Building Room 132 dpm/100 2 1 12.0 6,935 21,500 735,730 14 100.0 cm2 F8131371 Aux. Building Rooms 208, 211, Lower Walls dpm/100 1 1 240 5,461 21,500 154,800 35 100.0 cm2 F8131372 Aux. Building Rooms 208, 211, Upper Walls dpm/100 2 2 811 5,461 21,500 N/A 14 27.0 cm2 F8131691 Aux. Building Rooms 309-317, and 350, Lower Walls dpm/100 1 2 716 3,627 21,500 N/A 14 41.0 cm2 F8131692 Aux Building Rooms 309-317 and 350, Upper Walls dpm/100 2 3 589 3,627 21,500 N/A 14 26.0 cm2 F8132132 Aux. Building Exterior 20 El. Steam Support Structure dpm/100 2 2 276.5 342 21,500 N/A 14 38.0 cm2 F8132133 Aux. Building Exterior 0 El. Steam Support Structure dpm/100 3 1 4.0 342 21,500 2,080,217 14 100.0 cm2 F8132134 Aux. Building Exterior 20 El. Steam Support Structure dpm/100 4 1 2.25 342 21,500 3,551,800 14 100.0 cm2 F8132143 Aux. Building Exterior Walls, East dpm/100 3 3 410 342 21,500 N/A 14 97.0 cm2 F8132144 Aux. Building Exterior Walls, North dpm/100 4 3 376 342 21,500 N/A 14 30.0 cm2 F8140003 Training and Records Building Breezeway dpm/100 1 3 431.4 3,627 21,500 N/A 14 14.0 cm2 F8260004 Turbine Building, Condenser Pump Pit, Central dpm/100 4 1 286 5,990 21,500 154,800 41 100.0 cm2 F8260006 Turbine Building, Condenser Pump Pit, South dpm/100 6 1 310 3,130 21,500 163,400 45 100.0 cm2 F8260008 Turbine Building, High Pressure Turbine Pit dpm/100 8 2 346 5,990 25,030 N/A 14 76.0 cm2 F8260010 Turbine Building, Condenser Pump Pit, North dpm/100 0 1 319 3,130 21,500 154,800 46 100.0 cm2 F8260011 Turbine Building, Lube Oil Pit dpm/100 1 1 160.4 3,130 33,610 154,800 23 100.0 cm2 F8260031 Turbine Sumps Piping dpm/100 1 1 2.0 23,464 50,000 100,000 15 100.0 cm2 16

Survey Survey Standard Design Number of  %

Class Unit LBGR Units Unit ID Deviation DCGLEMC Measurements Scan Size m2 F8260032 Turbine Building, Main Feed Pump Area dpm/100 2 2 186.2 5,990 25,030 N/A 14 54.0 cm2 F8260131 Turbine Building, Grade Level, North dpm/100 1 2 618.3 1,316 39,052 N/A 14 83.0 cm2 F8260141 Turbine Building, Grade Level, South dpm/100 1 2 980.5 1,316 39,052 N/A 14 51.0 cm2 F8260151 Turbine Building, Grade Level, South dpm/100 1 1 16.0 5,990 25,030 640,700 14 100.0 cm2 F8260161 Turbine Building Floor, North dpm/100 1 1 11.6 5,990 25,030 761,100 14 100.0 cm2 F8260171 Turbine Building, Grade Level, North dpm/100 1 1 16.6 3,130 21,500 563,522 14 100.0 cm2 F8260201 Turbine Building, Mezzanine, Interior Walls dpm/100 1 3 1,776 1,316 39,052 N/A 14 19.0 cm2 F8260202 Turbine Building, Structural Steel dpm/100 2 3 9,134 1,316 39,052 N/A 14 10.0 cm2 F8260251 Turbine Building, North Laydown Area dpm/100 1 3 679 46 21,500 N/A 14 25.0 cm2 F8260261 Turbine Building, South Laydown Area and Sump dpm/100 1 3 574 250 21,500 N/A 14 100.0 cm2 F8260302 Turbine Building, Exterior dpm/100 2 3 1596 1,723 37,831 N/A 14 57.0 cm2 F8261003 Turbine Building, Pedestal 1 dpm/100 3 1 309.8 5,990 25,030 163,400 45 100.0 cm2 F8261004 Turbine Building, Pedestal 2 dpm/100 4 1 262.2 5,990 25.030 163,400 38 100.0 cm2 F8261005 Turbine Building, Pedestal 3 dpm/100 5 2 236.5 1,316 21,500 N/A 14 31.0 cm2 F8340011 Industrial Area Railway Ci 1 1 100 10.2 25.6 154 15 100.0 g

F8340012 Industrial Area Railway Ci 2 2 4,735 0.018 49.6 N/A 14 46.1 g

F8340021 Railway External to the Industrial Area Ci 1 3 5,990 0.018 51.1 N/A 14 12.2 g

F8370001 RHUT and Aux. Boiler Pad (surface)

Ci 1 1 1,819 9.83 25.6 61.9 15 100.0 g

17

Survey Survey Standard Design Number of  %

Class Unit LBGR Units Unit ID Deviation DCGLEMC Measurements Scan Size m2 F8370002 Tank Farm/ RHUT (subsurface)

Ci 2 1 1,819 9.83 25.6 61.9 15 0.0 g

F8510005 Switch Yard South (plus Retention Basin Buffer)

Ci 5 3 7,913 0.047 25.6 N/A 14 13.9 g

F8990074 High Pressure Turbine Pedestal Drain dpm/100 4 1 8.0 23,464 50,000 100,000 15 100.0 cm2 F8990098 CDS Cross-Tie Ci 8 2 100.3 0.034 26.5 N/A 14 100.0 g

F8990111 Decay Heat Removal System Piping dpm/100 1 1 49.0 15,498 50,000 100,000 14 100.0 cm2 F8990401 Reactor Building Drains dpm/100 1 1 12.0 N/A1 50,000 100,000 89 100.0 cm2 F8990441 Spent Fuel Pool Piping dpm/100 1 1 38.0 N/A1 50,000 100,000 89 100.0 cm2 F8991093 RHUT 8 Drain Lines Ci 3 2 110 9.83 25.6 N/A 15 100.0 g

1 Does not apply to FSS Design of embedded piping, direct measurements acquired at 15 cm intervals.

4.4 Final Status Survey Results The methods used to determine the number of direct measurements to be taken is described in the LTP and the specific survey unit summary reports provided in Attachment I. Key survey results are given in Table 3 below Table 3 Survey Unit FSS Results Scan No. Direct Mean Maximum Direct No. Scan Measurement Measurements. Direct Direct Standard Units Elevated Range Taken Result Result Deviation Areas F5010051 Site Access Roadway 0.247 Co-60 18 0.808 0.851 0.004 Ci/g 0 0.350 Cs-137 F8000072 Industrial Area West (West of Barrel Farm) 8,482-11,076 14 0.069 0.086 0.009 Ci/g 1 cpm F8000073 Industrial Area West (North End) 6,363-7,239 cpm 14 0.062 0.085 0.010 Ci/g 0 F8000091 South East Industrial Area 0.337 Co-60 30 0.465 0.896 0.366 Ci/g 0 0.441 Cs-137 F8000101 Industrial Area Central Yard, North and East of Maintenance Building 0.156 Co-60 15 0.798 0.942 0.219 Ci/g 0 0.357 Cs-137 F8000102 Industrial Area Central Yard, North and West of Maintenance Building 0.178 Co-60 14 0.545 0.915 0.382 Ci/g 0 0.313 Cs-137 18

Scan No. Direct Mean Maximum Direct No. Scan Measurement Measurements. Direct Direct Standard Units Elevated Range Taken Result Result Deviation Areas F8000104 Pump Alley Access Corridor 10,146-11,639 14 1.04 1.09 0.043 Ci/g 3 cpm F8000105 Industrial Area, North-South Roadway East of BWB 0.227 Co-60 16 0.989 1.39 0.112 Ci/g 0 0.413 Cs-137 F8000106 Central Industrial Area Roadway 0.268 Co-60 14 0.290 0.313 0.014 Ci/g 0 0.18-0.77 Cs-137 F8000111 Industrial Area Corridor, North of A Warehouse and Fab Shop 0.315 Co-60 16 0.901 1.04 0.091 Ci/g 0 0.448 Cs-137 F8000142 North Industrial Area 6,685-15,674 14 0.738 0.796 0.028 Ci/g 8 cpm F8080031 Cooling Tower Buffer South 0.288 Co-60 20 0.966 1.06 0.065 Ci/g 0 1.06 Cs-137 F8080032 Cooling Tower Buffer West 0.270 Co-60 14 1.01 1.08 0.042 Ci/g 0 0.425 Cs-137 F8080033 Cooling Tower Buffer East 0.265 Co-60 16 0.952 1.00 0.036 Ci/g 0 0.361 Cs-137 F8100011 Tank Farm Southwest and Steam Sump (surface) 4,990-242,929 20 0.022 0.095 0.026 Unity 36 cpm F8100012 Tank Farm Southwest and Steam Sump (subsurface)

N/A Subsurface 40 0.142 1.08 0.231 Ci/g 0 F8100021 Tank Farm NW Quadrant (surface) 4,992-20,292 17 0.351 0.860 0.231 Ci/g 11 cpm F8100022 Tank Farm NW Quadrant (subsurface)

N/A Subsurface 34 0.027 0.717 0.122 Unity 0 F8100031 Tank Farm NE Quadrant (surface) 6,425-11,043 22 0.447 1.74 0.434 Ci/g 14 cpm F8100032 Tank Farm NE Quadrant (subsurface)

N/A Subsurface 43 0.049 0.070 0.009 Ci/g 0 F8100041Tank Farm CST and #2 & #3 Pads 895-71,920 38 2,609 3,118 232 dpm/100 cm2 2 F8100042 Tank Farm DRCST Pad 3,810-17,650 16 3,710 4,560 473 dpm/100 cm2 0 F8100043 Tank Farm BWST Pad 1,754-20,819 27 2,089 2,791 172 dpm/100 cm2 0 F8100044 Tank Farm Tritium Evaporator Pad 5,751-14,591 14 2,666 2,983 209 dpm/100 cm2 0 F8100051 Tank Farm Trench 1 3,987-10,367 67 0.006 .069 0.009 Unity 0 cpm 19

Scan No. Direct Mean Maximum Direct No. Scan Measurement Measurements. Direct Direct Standard Units Elevated Range Taken Result Result Deviation Areas F8100052 Tank Farm Trench 1 (surface) 3,201-4,751 cpm 38 0.387 0.671 0.094 Ci/g 0 F8100053 Tank Farm Trench 1 (subsurface)

N/A Subsurface 28 0.046 0.075 0.011 Ci/g 0 F8110111 Rx Building FSS Ring (+75 to +115) 3,564-41,945 180 2,992 17,259 3,012 dpm/100 cm2 0 F8110112 Rx Building FSS Ring (+25 to +75) 959-208,743 180 2,852 14,472 2,329 dpm/100 cm2 42 F8110113 Rx Building FSS Ring (-27 to +25) 1,131-1,085,884 180 2,004 12,308 1,758 dpm/100 cm2 44 F8110114 Rx Building Floor -27 3,209-64,644 183 0.178 0.625 0.108 Unity 0 F8111591 Rx Building Tendon Gallery 1,863-16,682 14 1,491 1,758 134 dpm/100 cm2 0 F8113000 Rx Building Exterior Dome 4,269-6,646 30 2,185 2,516 191 dpm/100 cm2 0 F8113001 Rx Building Exterior 3,807-7,593 14 1,375 1,504 88 dpm/100 cm2 0 F8120001 Spent Fuel Pool West Wall

<877 Co-60 848-52,274 Cs-137 28 3,800 18,716 4,233 dpm/100 cm2 5 F8120002 Spent Fuel Pool South Wall 2,399-40,311 20 2,537 7,978 1,430 dpm/100 cm2 0 F8120003 Spent Fuel Pool East Wall

<869-1,000 Co-60 558-70,177 Cs-137 30 2,798 13,466 2,243 dpm/100 cm2 0 F8120004 Spent Fuel Pool North Wall 4,954-226,127 43 2,974 33,624 4,909 dpm/100 cm2 2 F8120005 Spent Fuel Pool Floor 3,357-11,100 26 3,028 19,748 3,470 dpm/100 cm2 0 F8120121 Spent Fuel Building Exterior 2,581-23,504 18 2,201 4,012 808 dpm/100 cm2 0 F8120141 Spent Fuel Building Exterior 990-4,441 Cs-137 14 1,717 2,303 336 dpm/100 cm2 0 F8120171 Spent Fuel Building Styrofoam Gap 4,115-110,855 16 1,684 3,102 412 dpm/100 cm2 6 F8120181 Spent Fuel Building Styrofoam Gap 4,761-84,311 21 3,113 6,085 1,671 dpm/100 cm2 0 F8121001 Spent Fuel Building Floor 40 El.

1,633-72,374 41 2,472 6,603 874 dpm/100 cm2 1 F8121002 Spent Fuel Building 40 El. Lower Walls, North 1,442-243,746 50 3,343 6,680 708 dpm/100 cm2 1 F8121003 Spent Fuel Building 40 El. Lower Walls, South 5,510-10,804 26 3,717 4,387 368 dpm/100 cm2 0 F8121004 Spent Fuel Building 40 El. Upper Walls, South 2,910-5,112 18 1,355 2,697 572 dpm/100 cm2 0 20

Scan No. Direct Mean Maximum Direct No. Scan Measurement Measurements. Direct Direct Standard Units Elevated Range Taken Result Result Deviation Areas F8121005 Spent Fuel Building Control Rod Pit 4,145-6,250 14 1,389 2,013 257 dpm/100 cm2 0 F8121006 Spent Fuel Building 40 El. Upper Walls, North

<528-1240 Cs-137 14 1,440 2,148 554 dpm/100 cm2 0 F8130022 Aux. Building -47 El. Room 1, Ceiling 1,310-2,450 19 1,672 3,994 630 dpm/100 cm2 3 F8130041 Aux. Building -47 El. Room 2, Upper Walls 593-1,356,927 48 1,452 2,267 221 dpm/100 cm2 1 F8130731 Aux. Building Room 51e 645-293,443 23 2,050 4,508 751 dpm/100 cm2 7 F8130942 Aux. Building Room 109 3,727-68,488 14 5,116 29,458 7,301 dpm/100 cm2 0 F8131211 Aux. Building Room 132 1,106-32,968 14 1,641 2,137 249 dpm/100 cm2 0 F8131212 Aux Building Room 132 3,347-7,761 14 2,177 2,817 326 dpm/100 cm2 0 F8131371 Aux. Building Rooms 208, 211, Lower Walls 1,915-23,563 37 1,891 3,102 269 dpm/100 cm2 0 F8131372 Aux. Building Rooms 208, 211, Upper Walls 2,201-6,672 14 1,603 1,852 184 dpm/100 cm2 0 F8131691 Aux. Building Rooms 309-317, and 350, Lower Walls 1,936-18,556 23 1,621 2,039 307 dpm/100 cm2 0 F8131692 Aux Building Rooms 309-317 and 350, Upper Walls 3,389-12,566 14 2,228 3,211 409 dpm/100 cm2 0 F8132132 Aux. Building Exterior 20 El. Steam Support Structure 2,188-26,064 14 2,289 8,678 1,860 dpm/100 cm2 0 F8132133 Aux. Building Exterior 0 El. Steam Support Structure 6,756-13,197 14 2,183 3,932 571 dpm/100 cm2 0 F8132134 Aux. Building Exterior 20 El. Steam Support Structure 19,124-30,796 15 6,267 22,191 6,135 dpm/100 cm2 0 F8132143 Aux. Building Exterior Walls, East 472-739 Co-60 14 1,243 1,634 183 dpm/100 cm2 0 662-978 Cs-137 F8132144 Aux. Building Exterior Walls, North 502-776 Co-60 14 1,582 1,841 116 dpm/100 cm2 0 707-978 Cs-137 F8140003 Training and Records Building Breezeway 1,731-3,153 14 1,109 1,598 277 dpm/100 cm2 0 F8260004 Turbine Building, Condenser Pump Pit, Central 1,079-22,066 46 1,674 5,032 593 dpm/100 cm2 0 F8260006 Turbine Building, Condenser Pump Pit, South 1,460-52,642 50 2,184 9,882 1,268 dpm/100 cm2 0 F8260008 Turbine Building, High Pressure Turbine Pit 3,631-46,275 17 2,174 2,827 388 dpm/100 cm2 1 21

Scan No. Direct Mean Maximum Direct No. Scan Measurement Measurements. Direct Direct Standard Units Elevated Range Taken Result Result Deviation Areas F8260010 Turbine Building, Condenser Pump Pit, North 1,614-34,413 49 1,520 3,631 461 dpm/100 cm2 0 F8260011 Turbine Building, Lube Oil Pit 1,331-13,858 24 1,673 2,713 360 dpm/100 cm2 0 F8260031 Turbine Sumps Piping 1,660-2,208 30 2,007 2,208 147 dpm/100 cm2 0 F8260032 Turbine Building, Main Feed Pump Area 4,218-8,818 15 2,047 2,770 365 dpm/100 cm2 2 F8260131 Turbine Building, Grade Level, North 3,020-21,303 15 1,557 1,945 208 dpm/100 cm2 2 F8260141 Turbine Building, Grade Level, South

<991 Co-60 <1,250 to 10,408 Cs-137 14 1,698 1,945 236 dpm/100 cm2 1 F8260151 Turbine Building, Grade Level, South 3,492-13,953 16 1,552 2,806 380 dpm/100 cm2 0 F8260161 Turbine Building Floor, North 3,236-20,988 15 2,584 7,672 1,995 dpm/100 cm2 0 F8260171 Turbine Building, Grade Level, North 5,524-13,036 14 2,672 5,203 1,047 dpm/100 cm2 0 F8260201 Turbine Building, Mezzanine, Interior Walls 4,759-12,806 14 896 2,325 580 dpm/100 cm2 0 F8260202 Turbine Building, Structural Steel 953-16,396 14 651 1,446 312 dpm/100 cm2 0 F8260251 Turbine Building, North Laydown Area

<780 Co-60 14 2,151 3,247 347 dpm/100 cm2 0

<1,180 Cs-137 F8260261 Turbine Building, South Laydown Area and Sump 4,732-9,812 14 1,055 1,140 33 dpm/100 cm2 0 F8260302 Turbine Building, Exterior

<974 Co-60

<953-971 Cs-137 14 1,155 1,972 502 dpm/100 cm2 0 F8261003 Turbine Building, Pedestal 1 1,44544,257 50 1,917 6,733 931 dpm/100 cm2 0 F8261004 Turbine Building, Pedestal 2 3,045-187,872 43 2,841 6,375 1,329 dpm/100 cm2 9 F8261005 Turbine Building, Pedestal 3 2,347-7,827 15 1,520 1,675 85 dpm/100 cm2 0 F8340011 Industrial Area Railway 6,819-9,323 cpm 16 0.968 1.02 0.033 Ci/g 2 F8340012 Industrial Area Railway

<0.265 Co-60 0.14 to 0.286 Cs-137 23 0.856 0.947 0.051 Ci/g 0 F8340021 Railway External to the Industrial Area

<0.225 Co-60

<0.299 Cs-137 16 0.847 0.919 0.077 Ci/g 0 22

Scan No. Direct Mean Maximum Direct No. Scan Measurement Measurements. Direct Direct Standard Units Elevated Range Taken Result Result Deviation Areas F8370001 RHUT and Aux. Boiler Pad (surface) 0.306 Co-60 0.14-0.24 Cs-137 18 0.144 0.900 0.269 Ci/g 0 F8370002 Tank Farm/ RHUT (subsurface)

N/A Subsurface 30 0.055 0.080 0.012 Ci/g 0 F8510005 Switch Yard South (plus Retention Basin Buffer)

<0.236 Co-60

<0.399 Cs-137 14 0.075 0.144 0.024 Ci/g 0 F8990074 High Pressure Turbine Pedestal Drain 3,531-6,926 44 5,459 6,926 1,246 dpm/100 cm2 0 F8990098 CDS Cross-Tie 7,393-10,864 14 0.047 0.059 0.008 Ci/g 8 cpm F8990111 Decay Heat Removal System Piping 10,024-44,824 227 22,512 44,824 6,987 dpm/100 cm2 0 F8990401 Reactor Building Drains 1,757-19,144 203 4,427 19,144 3,215 dpm/100 cm2 0 F8990441 Spent Fuel Pool Piping 1,260-26,111 1,243 4,040 26,111 2,885 dpm/100 cm2 0 F8991093 RHUT 8 Drain Lines 0.255 Co-60 16 0.041 0.049 .003 Ci/g 0 0.295 Cs-137 4.5 Survey Unit Conclusions Rancho Seco concludes that this information is sufficient for the NRC to make a determination equivalent to 10CFR50.82 (a)(11) regarding the survey units contained in this submittal. The surveys for these survey units and associated documentation demonstrate that these areas of the facility and site are suitable for release in accordance with the criteria for decommissioning in 10CFR20, subpart E by meeting a site release criteria of 25 millirem TEDE per year over background for all dose pathways in accordance with the approved License Termination Plan.

As stated in section 4 of the Rancho Seco LTP, as long as the residual activity within a survey unit is less than the DCGL (i.e., the survey unit average activity is less than the DCGL and the EMC criterion has been met),

the ALARA criterion has been achieved.

23

4.6 Summary Report Revisions Revisions were made to five summary reports from previous submittals.

Two revisions were made for submittal 4 (F800011, Helo Pad Area and F8130161, Auxiliary Building Rm 15). Three revisions were made for Submittal 2 (F8130481, Auxiliary Building Rm 37; F8130521, Auxiliary Building Rm 39 and F8130561, Auxiliary Building Rm 41)

F8000011 Helo Pad Area provided an incorrect reference in Table 1 of the Summary Report for the Design Sigma. The correct reference (Table 5-4B) has been included in revision 1 of the report.

F8130161 Auxiliary Building Rm 15 FSS Summary Report, Table 3-1 was difficult to interpret. The Table has been revised with sufficient information and footnotes to provide easier interpretation and the Summary Report has been revised to address changes from Table 3-1.

F8130481, F8130521, F8130561 Auxiliary Building Rms 37, 39 and 41 As part of the corrective action for DQ#07-020, gamma surveys were made in rooms 37, 39, and 41 once remediation was complete in the adjacent pump alley. The gamma survey indicated the presence some small elevated areas (less than 0.5 m2). In the interest of completeness, those areas were evaluated and added to Table 3-1 of the Summary Reports for the survey units. Those revised reports are included in Attachment 1 of this Report.

During the teleconference conducted with NRC representatives regarding Submittal 4 items noted in the first paragraph a third finding was noted. This item was associated with survey unit F8990421 where a single measurement was observed to be above the 100,000 dpm/100 cm2 DCGL for buried and embedded piping. An examination had been made of this anomalous measurement and the results of the finding placed with the survey package but not with the submitted final summary report. The findings showed that the observed measurement was relative to the existing activity at the op of the drain and the piping but not likely associated with the piping internals.

The measurement was taken at the 0 location of the piping which is at the pipe entrance. The area factor for piping (~730 cm2) or the floor region would result in an insignificant level for the recorded 137,654 dpm/100 cm2 pipe detector result. Attachment 2 of this report provides the findings associated with F8990421.

4.7 Attachment 3 of this report presents a Table of the as-left dose for each survey unit and is based on the appropriate DCGL and survey unit listing.

5.0 References Rancho Seco License Termination Plan, rev. 1, submitted 6/08.

DQ#07-020, Elevated Activity in Areas Having Already Completed FSS.

24

25 Attachment 1 Survey Unit Summary Reports 26

Attachment 2 Examination of Elevated Measurement in SU F8990421 Radwaste System Piping Location M1267GI, July 22, 2008 General Final Status Surveys of the Radwaste System Piping indicated that at one location (M1267GI) the direct measurement result was 137,654 dpm/100 cm2. This survey location is at the 0 location (entrance) of a floor cleanout. The 6 inch diameter piping segment is 31.5 feet in length and noted as 3-2-14. This segment of piping surveys consisted of 64 direct measurements.

Findings

1. The final survey of segment 3-2-14 was conducted using a 44-159 detector. The detector instrument parameters used for the survey were set for a 44-157 detector.

2. With the exception of the dead time constant the instrument configuration used for both detectors (principally, high voltage and threshold) are the same therefore the signal processing and cpm results are essentially the same.

3. For these reasons the FSS data was preserved and the cpm results processed using the efficiency for 44-159 detectors.

4. Because a Peak-to-Total evaluation had not been conducted for 44-159 detectors in six inch piping the FSS survey results for piping segment 3-2-14 are biased high. Based on other measurements conducted in piping of the same size using both the 44-157 and the 44-159 detector indicate that the their Peak-to-Total response is very similar and the 32 measurements reported for segment 3-2-14 are expectedly biased high by a factor of 6 or more.

5. Because the area factor for the single location where the elevated measurement was located (~730 cm2) is large the single elevated measurement is insignificant.

6. The location of the elevated measurement is at the 0 location of the floor cleanout and if present, could potentially contribute to the room DCGL. For this concern several measurements were conducted using a 44-10 detector as presented in Figure 1.0 below. [Note that two grid locations (C0)321(BS) and (C0)322(BS) are noted in Figure 1.0.] Four 30.5 cm square grids were examined.

One grid is located over the grouted floor cleanout and the other grids are adjacent to the grouted cleanout. Only the cleanout end exhibits any gamma activity significantly above the background.

7. Grid C0321GS of SU F8130361 (Ion Exchanger Valve Area, Room 27) resulted in the highest beta scan location for the room (57,103 dpm/100 cm2) and is below the DCGLEMC by a factor of 2.5.

1

Figure 1.0 Conclusion Both the anticipated piping area factor based on the piping area of interest (M1267GI) and the beta scan survey results for grid C0321BS relative to the room DCGLEMC values support the insignificance of the 137,654 dpm/100 cm2 piping survey observation. The reported 44-159 detector values for piping segment 3-2-14 are not corrected for Peak-to-Compton contribution biasing the reported results high. The resulting direct measurement conducted with the 44-10 detector over the drain reflect the gamma conditions of the elevated surface activity associated with the Room 27 grid C0321BS.

Based on the above conclusions survey unit F899421was properly designed and the number of direct measurements meets the requirements of the RSNGS License Termination Plan. The resulting examination and evaluation provides high confidence that the survey unit satisfies the release criteria.

2

Attachment 3 As Left Dose Report By Survey Unit Mean DCGL mrem SUID# SU Name Activitya DCGLa Fraction /year F1000001 Effluent Corridor 0.047 1 0.047 1.18 F1000002 Effluent Corridor 0.691 51.2 0.013 0.34 F1000003 Effluent Corridor 0.033 1 0.033 0.83 F1000004 Effluent Corridor 0.153 1 0.153 3.83 F2000001 South Outfall 0.272 51.2 0.005 0.13 F5010011 Receiving Warehouse Ext 1006 43,000 0.023 0.58 F5010012 Receiving Warehouse Int 1082 43,000 0.025 0.63 F5010031 Upper/Outer Yard 0.764 51.2 0.015 0.37 F5010032 Hazardous Waste Bld Pad 2503 43,000 0.058 1.46 F5010041 Extended Parking Area 0.093 51.2 0.002 0.05 F5010042 Extended Parking Area 0.677 51.2 0.013 0.33 F5010051 Site Access Roadway 0.808 51.2 0.016 0.39 F8000011 Helo Pad 0.497 51.2 0.010 0.24 F8000041 Central Transit Yard 0.665 51.2 0.013 0.32 F8000071 West Industrial Area 0.064 51.2 0.001 0.03 Industrial Area West (West of Barrel F8000072 Farm) 0.069 51.2 0.001 0.03 F8000073 Industrial Area West (North End) 0.062 51.2 0.001 0.03 F8000091 South East Industrial Area 0.465 51.2 0.009 0.23 Industrial Area Central Yard, North F8000101 and East of Maintenance Building 0.798 51.2 0.016 0.39 Industrial Area Central Yard, North F8000102 and West of Maintenance Building 0.545 51.2 0.011 0.27 F8000103 Aux Bld/NSEB Alley 0.849 51.2 0.017 0.41 F8000104 Pump Alley Access Corridor 1.04 51.2 0.020 0.51 Industrial Area, North-South F8000105 Roadway East of BWB 0.989 51.2 0.019 0.48 F8000106 Central Industrial Area Roadway 0.290 51.2 0.006 0.14 Industrial Area Corridor, North of "A" F8000111 Warehouse and Fab Shop 0.901 51.2 0.018 0.44 F8000121 Industrial Area Yard Buffer 0.365 51.2 0.007 0.18 F8000141 North Industrial Area 0.078 51.2 0.002 0.04 F8000142 North Industrial Area 0.738 51.2 0.014 0.36 F8040011 PAP Bld Ext 3556 43,000 0.083 2.07 F8040012 PAP Bld Int 2261 43,000 0.053 1.31 F8050011 Admin Bld Int 1926 43,000 0.045 1.12 F8050012 Admin Bld Ext 2054 43,000 0.048 1.19 F8080011 E, W Cooling Tower Basins 2182 43,000 0.051 1.27 F8080031 Cooling Tower Buffer South 0.966 51.2 0.019 0.47 1

Attachment 3 As Left Dose Report By Survey Unit Mean DCGL mrem SUID# SU Name Activitya DCGLa Fraction /year F8080032 Cooling Tower Buffer West 1.01 51.2 0.020 0.49 F8080033 Cooling Tower Buffer East 0.952 51.2 0.019 0.46 F8090011 Sewer Plant Pavement 0.890 51.2 0.017 0.43 Tank Farm Southwest and Steam F8100011 Sump (surface) 0.022 1 0.022 0.55 Tank Farm Southwest and Steam F8100012 Sump (subsurface) 0.142 51.2 0.003 0.07 F8100021 Tank Farm NW Quadrant (surface) 0.351 51.2 0.007 0.17 Tank Farm NW Quadrant F8100022 (subsurface) 0.027 1 0.027 0.68 F8100031 Tank Farm NE Quadrant (surface) 0.447 51.2 0.009 0.22 Tank Farm NE Quadrant F8100032 (subsurface) 0.049 51.2 0.001 0.02 F8100041 Tank Farm CST and #2 & #3 Pads 2609 43,000 0.061 1.52 F8100042 Tank Farm DRCST Pad 3710 43,000 0.086 2.16 F8100043 Tank Farm BWST Pad 2089 43,000 0.049 1.21 F8100044 Tank Farm Tritium Evaporator Pad 2666 43,000 0.062 1.55 F8100051 Tank Farm Trench 1 0.006 1 0.006 0.15 F8100052 Tank Farm Trench 1 (surface) 0.387 51.2 0.008 0.19 F8100053 Tank Farm Trench 1 (subsurface) 0.046 51.2 0.001 0.02 Rx Building FSS Ring (+75' to F8110111 +115') 2992 43,000 0.070 1.74 F8110112 Rx Building FSS Ring (+25' to +75') 2852 43,000 0.066 1.66 F8110113 Rx Building FSS Ring (-27' to +25') 2004 43,000 0.047 1.17 F8110114 Rx Building Floor -27' 0.178 1 0.178 4.45 F8111571 Reactor Bld Dome 0.440 1 0.440 11.00 F8111591 Rx Building Tendon Gallery 1491 43,000 0.035 0.87 F8113000 Rx Building Exterior Dome 2185 43,000 0.051 1.27 F8113001 Rx Building Exterior 1375 43,000 0.032 0.80 F8120001 Spent Fuel Pool West Wall 3800 43,000 0.088 2.21 F8120002 Spent Fuel Pool South Wall 2537 43,000 0.059 1.48 F8120003 Spent Fuel Pool East Wall 2798 43,000 0.065 1.63 F8120004 Spent Fuel Pool North Wall 2974 43,000 0.069 1.73 F8120005 Spent Fuel Pool Floor 3028 43,000 0.070 1.76 F8120111 Cask Catcher Pad 2616 43,000 0.061 1.52 F8120121 Spent Fuel Building Exterior 2201 43,000 0.051 1.28 F8120131 Fuel Bld Ext 1235 43,000 0.029 0.72 F8120141 Spent Fuel Building Exterior 1717 43,000 0.040 1.00 F8120151 Fuel Bld Ext 1356 43,000 0.032 0.79 F8120161 Fuel Bld Ext 2328 43,000 0.054 1.35 2

Attachment 3 As Left Dose Report By Survey Unit Mean DCGL mrem SUID# SU Name Activitya DCGLa Fraction /year F8120171 Spent Fuel Building Styrofoam Gap 1684 43,000 0.039 0.98 F8120181 Spent Fuel Building Styrofoam Gap 3113 43,000 0.072 1.81 F8121001 Spent Fuel Building Floor 40' El. 2472 43,000 0.057 1.44 Spent Fuel Building 40' El. Lower F8121002 Walls, North 3343 43,000 0.078 1.94 Spent Fuel Building 40' El. Lower F8121003 Walls, South 3717 43,000 0.086 2.16 Spent Fuel Building 40' El. Upper F8121004 Walls, South 1355 43,000 0.032 0.79 F8121005 Spent Fuel Building Control Rod Pit 1389 43,000 0.032 0.81 Spent Fuel Building 40' El. Upper F8121006 Walls, North 1440 43,000 0.033 0.84 F8130011 Aux Bld Rm 1 Lower 2543 43,000 0.059 1.48 F8130021 Aux Bld Rm 1 Upper 1870 43,000 0.043 1.09 Aux. Building -47' El. Room 1, F8130022 Ceiling 1672 43,000 0.039 0.97 F8130031 Aux Bld Rm 2 Lower 2079 43,000 0.048 1.21 Aux. Building -47' El. Room 2, Upper F8130041 Walls 1452 43,000 0.034 0.84 F8130042 Aux Bld Rm 2 Upper 1478 43,000 0.034 0.86 F8130051 Aux Bld Rm 3 Lower 3560 43,000 0.083 2.07 F8130061 Aux Bld Rm 3 Upper 2076 43,000 0.048 1.21 F8130071 Aux Bld 02 stairs 2186 43,000 0.051 1.27 F8130081 Aux Bld 01 stairs 1754 43,000 0.041 1.02 F8130091 Aux Bld Rms 56,127,138 1354 43,000 0.031 0.79 F8130101 Aux Bld Rm 10 Lower 1974 43,000 0.046 1.15 F8130102 Aux Bld Rm 10 Upper 1624 43,000 0.038 0.94 F8130111 Aux Bld Rm 11 Lower 3568 43,000 0.083 2.07 F8130112 Aux Bld Rm 11 Upper 3167 43,000 0.074 1.84 F8130121 Aux Bld Rm 12 Lower 6193 43,000 0.144 3.60 F8130122 Aux Bld Rm 12 Upper 1863 43,000 0.043 1.08 F8130131 Aux Bld Rm 13 2236 43,000 0.052 1.30 F8130141 Aux Bld Rm 14 2719 43,000 0.063 1.58 F8130151 Aux Bld Rm 15, columns N-R 1734 43,000 0.040 1.01 F8130161 Aux Bld Rm 15, columns R-T 1819 43,000 0.042 1.06 F8130171 Aux Bld Rm 15, column T and east 1514 43,000 0.035 0.88 F8130181 Aux Bld Rm 16 3867 43,000 0.090 2.25 F8130191 Aux Bld Rm 17 2294 43,000 0.053 1.33 F8130201 Aux Bld Rm 18 Lower 2127 43,000 0.049 1.24 F8130211 Aux Bld Rm 18 Upper 1501 43,000 0.035 0.87 F8130221 Aux Bld Rm 19 Lower 2415 43,000 0.056 1.40 3

Attachment 3 As Left Dose Report By Survey Unit Mean DCGL mrem SUID# SU Name Activitya DCGLa Fraction /year F8130222 Aux Bld Rm 19 Upper 4518 43,000 0.105 2.63 F8130231 Aux Bld Rm 59 Lower 1947 43,000 0.045 1.13 F8130232 Aux Bld Rm 59 Upper 1695 43,000 0.039 0.99 F8130241 Aux Bld Rm 20 Lower 6332 43,000 0.147 3.68 F8130251 Aux Bld Rm 20 Upper 3580 43,000 0.083 2.08 F8130261 Aux Bld Rm 21 Lower 1784 43,000 0.041 1.04 F8130271 Aux Bld Rm 21 Upper 1343 43,000 0.031 0.78 F8130281 Aux Bld Rm 22 Lower 1749 43,000 0.041 1.02 F8130291 Aux Bld Rm 22 Upper 1625 43,000 0.038 0.94 F8130301 Aux Bld Rm 23 Lower 4246 43,000 0.099 2.47 F8130311 Aux Bld Rm 23 Upper 2382 43,000 0.055 1.38 F8130321 Aux Bld Rm 24 2379 43,000 0.055 1.38 F8130331 Aux Bld Rm 25 Lower 2585 43,000 0.060 1.50 F8130341 Aux Bld Rm 25 Upper 1873 43,000 0.044 1.09 F8130351 Aux Bld Rm 26 2422 16100 0.150 3.76 F8130361 Aux Bld Rm 27 2045 43,000 0.048 1.19 F8130401 Aux Bld Rms 28-31 1524 43,000 0.035 0.89 F8130411 Aux Bld Rms 32-35 1389 43,000 0.032 0.81 F8130421 Aux Bld Rm 36, floor and soil walls 0.164 1 0.164 4.10 Aux Bld Rm 36, North of column 9.7, F8130431 walls (above one meter) and ceiling 1565 43,000 0.036 0.91 Aux Bld Rm 36, North and East F8130441 Walls below -259 1916 43,000 0.045 1.11 Aux Bld Rm 36, Column 9.7 - 11.7, F8130451 Walls above one meter - ceilings 2676 43,000 0.062 1.56 Aux Bld Rm 36, South and West F8130461 concrete walls below 259 2433 43,000 0.057 1.41 Aux Bld Rm 36, column 11.7 - south F8130471 above -257 2272 43,000 0.053 1.32 F8130481 Aux Bld Rm 37 Lower 2295 43,000 0.053 1.33 F8130491 Aux Bld Rm 37 Upper 1800 43,000 0.042 1.05 F8130501 Aux Bld Rm 38 Lower 2357 43,000 0.055 1.37 F8130511 Aux Bld Rm 38 Upper 2281 43,000 0.053 1.33 F8130521 Aux Bld Rm 39 Lower 3795 43,000 0.088 2.21 F8130531 Aux Bld Rm 39 Upper 2441 43,000 0.057 1.42 F8130541 Aux Bld Rm 40 Lower 4677 43,000 0.109 2.72 F8130551 Aux Bld Rm 40 Upper 2746 43,000 0.064 1.60 F8130561 Aux Bld Rm 41 Lower 2646 43,000 0.062 1.54 F8130571 Aux Bld Rm 41 Upper 1848 43,000 0.043 1.07 F8130581 Aux Bld Rm 42 Lower 2717 43,000 0.063 1.58 4

Attachment 3 As Left Dose Report By Survey Unit Mean DCGL mrem SUID# SU Name Activitya DCGLa Fraction /year F8130591 Aux Bld Rm 42 Upper 2229 43,000 0.052 1.30 F8130601 Aux Bld Rm 43 Lower 1638 43,000 0.038 0.95 F8130611 Aux Bld rm 43 Upper 1521 43,000 0.035 0.88 F8130621 Aux Bld Rm 44 1981 43,000 0.046 1.15 F8130631 Aux Bld Rm 45 3368 43,000 0.078 1.96 F8130641 Aux Bld Rm 46 2258 43,000 0.053 1.31 F8130651 Aux Bld Rm 47 2079 43,000 0.048 1.21 F8130661 Aux Bld Rm 48 1428 43,000 0.033 0.83 F8130671 Aux Bld Rm 49 1778 16000 0.111 2.78 F8130681 Aux Bld Rm 50 Lower 3655 43,000 0.085 2.13 F8130682 Aux Bld Rm 50 Upper 1553 43,000 0.036 0.90 Aux Bld Rm 51, Columns 10.3 to F8130691 9.7, Lower 3164 43,000 0.074 1.84 Aux Bld Rm 51, Columns 10.3 to F8130701 9.7, Upper 3340 43,000 0.078 1.94 Aux Bld Rm 51, Columns 9.2 to 9.7, F8130711 Lower 2380 43,000 0.055 1.38 Aux Bld Rm 51, Columns 9.2 to 9.7, F8130721 Upper 1971 43,000 0.046 1.15 F8130731 Aux. Bd Rm 51, North of Column 9.1 2050 43,000 0.048 1.19 F8130732 Aux Bld Rm 51 and 52 Excavation 2633 43,000 0.061 1.53 Aux Bld Rm 52, West of Column N F8130741 Upper 1559 43,000 0.036 0.91 Aux Bld Rm 52, West of Column N F8130751 Lower 2198 43,000 0.051 1.28 Aux Bld Rm 52, East of Column N F8130761 Lower 2018 43,000 0.047 1.17 Aux Bld Rm 52, East of Column N F8130771 Upper 1621 43,000 0.038 0.94 F8130781 Aux Bld Rm 53 Lower 2411 43,000 0.056 1.40 F8130782 Aux Bld Rm 53 Upper 1425 43,000 0.033 0.83 F8130811 Aux Bld Rms 54,55 1643 43,000 0.038 0.96 F8130861 Aux Bld Rms 102,103 3106 43,000 0.072 1.81 F8130862 Aux Bld Rm 106 1426 43,000 0.033 0.83 F8130881 Aux Bld Rm2 104-135 1629 43,000 0.038 0.95 F8130931 Aux Bld Rm 107 3929 43,000 0.091 2.28 F8130941 Aux Bld Rms 109, 110 3876 43,000 0.090 2.25 F8130942 Aux. Building Room 109 5116 43,000 0.119 2.97 F8130991 Aux Bld Rm 112 3008 43,000 0.070 1.75 F8131001 Aux Bld Rm 111 1338 43,000 0.031 0.78 F8131011 Aux Bld Rm 113 1766 43,000 0.041 1.03 F8131021 Aux Bld Rm 114 1777 43,000 0.041 1.03 5

Attachment 3 As Left Dose Report By Survey Unit Mean DCGL mrem SUID# SU Name Activitya DCGLa Fraction /year F8131031 Aux Bld Rm 115 1267 43,000 0.029 0.74 F8131041 Aux Bld Rm 117 West 2535 43,000 0.059 1.47 F8131051 Aux Bld Rm 117 East 3505 43,000 0.082 2.04 F8131191 Aux Bld Rm 130 1452 43,000 0.034 0.84 F8131201 Aux Bld Rms 131,222,345 1644 43,000 0.038 0.96 F8131211 Aux. Bld Rm 132, Class 2 1641 43,000 0.038 0.95 F8131212 Aux Bld Rm 132, Class 1 2177 43,000 0.051 1.27 F8131221 Aux Bld Rm 133, Lower 3519 43,000 0.082 2.05 F8131222 Aux Bld Rm 133, Upper 2431 43,000 0.057 1.41 F8131231 Aux Bld Rm 134 2810 43,000 0.065 1.63 F8131311 Aux Bld Rm Aux Bld Mezz Roof 1556 43,000 0.036 0.90 F8131341 Aux Bld Rms 202,204 1676 43,000 0.039 0.97 F8131351 Aux Bld Rm 206 1620 43,000 0.038 0.94 F8131361 Aux Bld Rm 207 1454 43,000 0.034 0.85 Aux. Building Rooms 208, 211, F8131371 Lower Walls 1891 43,000 0.044 1.10 Aux. Building Rooms 208, 211, F8131372 Upper Walls 1603 43,000 0.037 0.93 F8131381 Aux Bld Rm 209 Upper 1648 43,000 0.038 0.96 F8131382 Aux Bld Rm 209 Lower 1666 43,000 0.039 0.97 F8131402 Aux Bld Rm 210 Upper 2205 43,000 0.051 1.28 F8131403 Aux Bld Rm 210 Lower 4069 43,000 0.095 2.37 F8131411 Aux Bld Rms 212-226,ped 1240 43,000 0.029 0.72 F8131561 Aux Bld Roof 1509 43,000 0.035 0.88 F8131601 Aux Bld Non-Cont Rms 1451 43,000 0.034 0.84 Aux. Building Rooms 309-317, and F8131691 350, Lower Walls 1621 43,000 0.038 0.94 Aux Building Rooms 309-317 and F8131692 350, Upper Walls 2228 43,000 0.052 1.30 F8131781 Aux Bld Rm 319 Lower 2246 43,000 0.052 1.31 F8131782 Aux Bld Rm 319 Upper 1586 43,000 0.037 0.92 F8131791 Aux Bld Rms 320 Lower 1283 43,000 0.030 0.75 F8131792 Aux Bld Rm 320 (all), 321 Upper 1612 43,000 0.037 0.94 F8131811 Aux Bld Rms 322-324,351 1404 43,000 0.033 0.82 F8131812 Aux Bld Rms 322-324,351 1774 43,000 0.041 1.03 F8132051 Aux Bld Rms 346,elev 1421 43,000 0.033 0.83 F8132131 Aux Bld Ext 1597 43,000 0.037 0.93 Aux. Building Exterior 20' El. Steam F8132132 Support Structure 2289 43,000 0.053 1.33 Aux. Building Exterior 0' El. Steam F8132133 Support Structure 2183 43,000 0.051 1.27 6

Attachment 3 As Left Dose Report By Survey Unit Mean DCGL mrem SUID# SU Name Activitya DCGLa Fraction /year Aux. Building Exterior 20' El. Steam F8132134 Support Structure 6267 43,000 0.146 3.64 F8132141 Aux Bld Ext 2730 43,000 0.063 1.59 F8132142 Aux Bld Ext South Wall 1292 43,000 0.030 0.75 F8132143 Aux. Building Exterior Walls, East 1243 43,000 0.029 0.72 F8132144 Aux. Building Exterior Walls, North 1582 43,000 0.037 0.92 F8140002 T&R Bld Ext 1530 43,000 0.036 0.89 Training and Records Building F8140003 Breezeway 1109 43,000 0.026 0.64 F8140010 T&R Bld Int 1416 43,000 0.033 0.82 F8150011 NSEB Int 1853 43,000 0.043 1.08 F8150021 NSEB Ext 1882 43,000 0.044 1.09 F8170011 Diesel Gen Bld Int 1707 43,000 0.040 0.99 F8170021 Diesel Gen Bld Ext 1880 43,000 0.044 1.09 F8210001 Water Treat Bld Int 1621 43,000 0.038 0.94 F8210002 Water Treat Bld Ext 1614 43,000 0.038 0.94 F8220011 Chlorine Bld Int 2246 43,000 0.052 1.31 F8220021 Chlorine Bld Ext 2804 43,000 0.065 1.63 F8230001 Intake Structure 2284 43,000 0.053 1.33 F8240001 Primary Cooling Water Str 2078 43,000 0.048 1.21 F8260001 Condensate Pit 1824 43,000 0.042 1.06 F8260002 Turb Bld Polisher Sump 2026 43,000 0.047 1.18 Turbine Building, Condenser Pump F8260004 Pit, Central 1674 43,000 0.039 0.97 Turbine Building, Condenser Pump F8260006 Pit, South 2184 43,000 0.051 1.27 Turbine Building, High Pressure F8260008 Turbine Pit 2174 43,000 0.051 1.26 Turbine Building, Condenser Pump F8260010 Pit, North 1520 43,000 0.035 0.88 F8260011 Turbine Building, Lube Oil Pit 1673 43,000 0.039 0.97 F8260031 Turbine Sumps Piping 2007 43,000 0.047 1.17 Turbine Building, Main Feed Pump F8260032 Area 2047 43,000 0.048 1.19 F8260131 Turbine Building, Grade Level, North 1557 43,000 0.036 0.91 F8260141 Turbine Building, Grade Level, South 1698 43,000 0.039 0.99 F8260151 Turbine Building, Grade Level, South 1552 43,000 0.036 0.90 F8260161 Turbine Building Floor, North 2584 43,000 0.060 1.50 F8260171 Turbine Building, Grade Level, North 2672 43,000 0.062 1.55 Turbine Building, Mezzanine, Interior F8260201 Walls 896 43,000 0.021 0.52 F8260202 Turbine Building, Structural Steel 651 43,000 0.015 0.38 7

Attachment 3 As Left Dose Report By Survey Unit Mean DCGL mrem SUID# SU Name Activitya DCGLa Fraction /year Turbine Building, North Laydown F8260251 Area 2151 43,000 0.050 1.25 Turbine Building, South Laydown F8260261 Area and Sump 1055 43,000 0.025 0.61 F8260302 Turbine Building, Exterior 1155 43,000 0.027 0.67 F8260303 Turb Bld Deck 2026 43,000 0.047 1.18 F8260304 Turb Bld Deck 2040 43,000 0.047 1.19 F8260305 Turb Bld Deck 1823 43,000 0.042 1.06 F8261001 S Turbine Pedestal 1372 43,000 0.032 0.80 F8261002 LP Turbine Pedestal 1708 43,000 0.040 0.99 F8261003 Turbine Building, Pedestal 1 1917 43,000 0.045 1.11 F8261004 Turbine Building, Pedestal 2 2841 43,000 0.066 1.65 F8261005 Turbine Building, Pedestal 3 1520 43,000 0.035 0.88 F8310001 Microwave Bld Int 1634 43,000 0.038 0.95 F8310002 Microwave Bld Ext 2338 43,000 0.054 1.36 F8320001 Diesel Fuel Oil Tank Pad 0.051 51.2 0.001 0.02 F8330001 Warehouse B Int 1737 43,000 0.040 1.01 F8330002 Warehouse B Ext 1704 43,000 0.040 0.99 F8340011 Industrial Area Railway 0.968 51.2 0.019 0.47 F8340012 Industrial Area Railway 0.856 51.2 0.017 0.42 Railway External to the Industrial F8340021 Area 0.847 51.2 0.017 0.41 F8370001 RHUT and Aux. Boiler Pad (surface) 0.144 51.2 0.003 0.07 F8370002 Tank Farm/ RHUT (subsurface) 0.055 51.2 0.001 0.03 F8390001 Transformer Yard 0.285 51.2 0.006 0.14 F8400001 Warehouse A Int 1549 43,000 0.036 0.90 F8400002 Warehouse A Ext 2315 43,000 0.054 1.35 F8430011 Barrel Farm 0.063 51.2 0.001 0.03 F8430021 Barrel Farm Surface Soil 0.057 51.2 0.001 0.03 F8480011 N Retention Basin 0.043 1 0.043 1.08 F8480012 S Retention Basin 0.058 1 0.058 1.45 F8480013 Discharge Boxes/Manholes 1805 43,000 0.042 1.05 F8480014 Discharge Boxes/Manholes 1972 43,000 0.046 1.15 F8480015 Discharge Boxes/Manholes 1876 43,000 0.044 1.09 F8480016 Discharge Boxes/Manholes 2182 43,000 0.051 1.27 F8480017 Retention Basin Surf Soil 0.059 51.2 0.001 0.03 F8480018 Reten Basin Concrete Str 0.013 1 0.013 0.33 F8480019 Misc Small Blds Reten 914 43,000 0.021 0.53 F8480021 Retention Basin Buffer 0.063 51.2 0.001 0.03 8

Attachment 3 As Left Dose Report By Survey Unit Mean DCGL mrem SUID# SU Name Activitya DCGLa Fraction /year F8500011 Solidification Pad, NE Lower 2200 43,000 0.051 1.28 F8500012 Solidification Pad, S Lower 2078 43,000 0.048 1.21 Solidification Pad Beneath NE F8500013 Section 2585 43,000 0.060 1.50 F8500014 Solidification Pad, NW Lower 1911 43,000 0.044 1.11 F8510001 Switch Yard Soil 0.061 51.2 0.001 0.03 F8510002 Switch Yard Pavement 0.820 51.2 0.016 0.40 F8510003 Switch Yd Bld Ext 927 43,000 0.022 0.54 F8510004 Switch Yd Bld Int 1727 43,000 0.040 1.00 Switch Yard South (plus Retention F8510005 Basin Buffer) 0.075 51.2 0.001 0.04 F8520001 Machine Shop Int 1584 43,000 0.037 0.92 F8520002 Machine Shop Ext 1973 43,000 0.046 1.15 F8540001 Misc Small Blds POL 785 43,000 0.018 0.46 F8540002 Misc Small Blds Lawn 1705 43,000 0.040 0.99 F8560001 SAS Bld Ext 1853 43,000 0.043 1.08 F8560002 SAS Bld Int 1620 43,000 0.038 0.94 F8570001 Sub-Surface Vaults 400 43,000 0.009 0.23 F8990021 Aux Feedwater Pipe 5217 100,000 0.052 1.30 F8990054 CDS-Clean Drain Pipe 8211 100,000 0.082 2.05 F8990060 Comp Cool Water Pipe 5094 100,000 0.051 1.27 F8990071 Turbine Bld Drains East Grade Level 2901 100,000 0.029 0.73 F8990072 Turbine Bld Drains +40 Elevation 1663 100,000 0.017 0.42 F8990073 Turbine Bld Drains Grade Level 2236 100,000 0.022 0.56 High Pressure Turbine Pedestal F8990074 Drain 5459 100,000 0.055 1.36 F8990091 CDS-Storm Drains 8386 100,000 0.084 2.10 F8990098 CDS Cross-Tie 0.047 51.2 0.001 0.02 F8990111 Decay Heat Removal System Piping 22512 100,000 0.225 5.63 F8990281 Main Condensate Pipe 2907 100,000 0.029 0.73 F8990291 Circulating Water Pipe 171 100,000 0.002 0.04 F8990321 Nitrogen Pipe 3444 100,000 0.034 0.86 F8990351 Nuclear Service Water Pipe 8258 100,000 0.083 2.06 F8990401 Reactor Building Drains 4427 100,000 0.044 1.11 F8990421 Radwaste System Piping 4609 100,000 0.046 1.15 F8990422 East Radwaste System Piping 5692 100,000 0.057 1.42 F8990423 West Radwaste System Piping 3929 100,000 0.039 0.98 F8990431 Service Air Pipe 2295 100,000 0.023 0.57 F8990441 Spent Fuel Pool Piping 4040 100,000 0.040 1.01 9

Attachment 3 As Left Dose Report By Survey Unit Mean DCGL mrem SUID# SU Name Activitya DCGLa Fraction /year F8990471 Service Water Pipe 1433 100,000 0.014 0.36 F8990501 Waste Gas Pipe 2406 100,000 0.024 0.60 F8990511 Carbon Dioxide Pipe 1929 100,000 0.019 0.48 F8990521 Acid Waste Pipe 3327 100,000 0.033 0.83 F8991071 CDS-Oily Water Separator 2259 100,000 0.023 0.56 CDS-Oily Water Separator, Storm F8991072 Drains 10070 100,000 0.101 2.52 CDS-Oily Water Separator, F8991073 Transformer Yard drain line trench 0.049 51.2 0.001 0.02 F8991091 RHUT Trench 0.008 1 0.008 0.20 F8991092 CDS-RHUT Pipe 26425 100,000 0.264 6.61 F8991093 RHUT 8" Drain Lines 0.041 51.2 0.001 0.02 2

a. Units are dpm/100 cm (43,000 and 100,000) or pCi/g (51.2). No units when Unity used.

10