ML012430186

Part 2 - Haddam Neck Plant Historical Site Assessment Supplement in Support of License Termination Plan (TAC MA9791), Section A-1: Conceptual Model & Site Diagram

ML012430186
Person / Time
Site:	Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png
Issue date:	08/22/2001
From:	Fetherston N Connecticut Yankee Atomic Power Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
-RFPFR, BCY-HP-0067, TAC MA9791 24265-000-G65-GEHH-P00067-000
Download: ML012430186 (95)

Text

Section A-I Conceptual Model and Site Diagram Millennium Services, Inc. 148

-, 4.

TWI Open Land Areas / N 4.

44 (Page 1 of 2)

GAD 9003

/ /

Radiation Range: Gamma Radiation 0.003 mR/hr to 0.015 mR/hr

/ / / 1%

Radiation levels are typical of background radiation levels from I primordial nualides in soil and rock. / 4.- 1 I

Contamination Range: Co-137 0.79 pCI/gM to 7.20 pCI/gm. Co-60 I I 0.041 pCi/gm to 7,50 pCI/gnv I I S.

Elevated Cs-137 concentrations were measured In two areas (9520, / I 9522). Maximum Cs-137 concentration of 7.2 pCI/gm not confirmed I I during subsequent characterization surveys. Cs-137 maximum I concentrations are less than th expected DCOLs, All other Cs-137 I I values ae in the range associated with fallout from weapons testing. At -

Co-60 d'tected in four survey areas (9520, 9522, 9527, 9530), A single I -.

measurements in one area (9522) Identified Co60 at a concentration greater than the DCOL. Subsequent characterization surveys could not L~I.

confirm the elevated measurements. All other Co-60 measurements are less than the expected DCGL.

Isotop. Identiflication: Cs-137 and Co-60 The only isotopes Identified in soil samples taken in these areas are Cs 137 and Co-60. The only other Isotopes identified in samples are primordial nuclides.

0 Area 9530 Soil Sample Location.

(Rf. CY RPM 5.1.2 Survey 2/2/99) Continued on next page.

• Soil Samples Locations.

(Ref. CY Results of Scoping Surveys 9/98)

Mfillennium Services Inc.

Open Land Areas (Page 2 of 2)

GAD 9003 "Survey Radiation Contamination Levels Area Survey Area Cls Levels PUS Code Description mR/hour Medium Nuclide Max C _dl Min Max Southwest Site 9518 Grounds (Non- 2 Protected Area) 9520 Southwest Site 0.003 0,012 Soil Co-60 0.13 Storage Area Cs-137 6.30 Southeast Site Co-60 7,50 9522 Grounds (Non- 2 0,012 0,015 Soil Cs-137 7.20 Protected Area) 3 Soil Cs.137 079 9526 NortheastSideMountain td Sil Cs-167 0,473 9527 East Mountain Side 2 0.061 0.132 Soil Co-60 0,453 Cs-137 1,69 9530 Central Peninsula 2,Co-60 0.041 Area Cs-137 1,69 Millennium Services Inc.

&FLand Areas (Page 1 of 2)

GAD 9003 Radiation Range: Gamma Radiation at background levels Radiation levels are typical of background radiation levels from primordial nuclides in soil and rock.

Contamination Range: Cs-137 <0.18 pCL/gm to 1.898 pCVgm Cs-137 contamination detected at levels less than 20% of the expected

, SALMON OMI

-- I UIN DCGL. Cs-137 concentrations are at the levels associated with fallout from weapons testing, Sa hotope Identification: Cs-137, Co-60 The predominant isotope Identified other than primordial nuclides is Cs V.

137. Cs-137 Is also attributed to fallout from weapons testing.

U Soil Sample Locations

(

4-(Ref. Area 9524 HP 99-057 2/15/99) I (Ref. Area 9525 HNP Gamma Spect. 9525C0001 4/8/98)

I 1%

(Ref. Area 9528 Duke 05745 12/2 1/00) Containment 4-4%

Building 0

Millennium Services Inc. 1/4' G 0/ý'

CY Land Areas (Page 2 of 2)

GAD 9003 Radiation

• Survey Survey ARadiatveonContamination Levels Areay D Area Class Levels pCi/g Code Description mi oMax Medium Nuclide Max 9523 Southeast Wetland 3 Area South Site Grounds 9524 (Non-Protected Area) Soil Cs-137 <0.18 9525 Southeast Site Road 3 Soil Cs-137 <0,18 9528 Southeast Mountain 3 Soil Cs-137 1,898 Side South End of 91 Peninsula Millennium Services Inc.

East Site Grounds (Non-Protected Area) / a

'S.

Non-Impacted Area 9532 I GAD 9003 I 1%

I Radiation Range: Environmental Background I 'a A

• • 1 The historical data Indicates that site contamination events would have /

no radiological Impact on the East Site Grounds due to distance and '4 topography from the potential source of release. Records and C9--32 surveillances do not indicate that spills, discharges and other occurrences would have resulted in the spread of contamination into the // 10 II East Site Grounds. Environmental monitoring performed within the A 4%

East Site Grounds at location #6-I has not Identified plant related I radionuclides at this location, Walk downs and visual inspections or the I 4%

area have not Identified obvious or perceptible storage, dumping or burial of plant-related radioactive materials in the East Site Grounds.

I Therefore the area has been properly classified as non-impacted. I 00 1%

0 Environmental Monitoring Station #6-I QContainment Building Millennium Services Inc.

0 65

Land Areas (Page 1 of 2) 4t 4%

GAD 9003 %4%

/

Radiation Range: Gamma Radiation 009 mR/hr to ,013 mR/hr

/ 4%

Radiation levels are typical of background radiation levels from

/ I' primordial nuclides In soil and rock.

/ '4 Contamination Range: Cs-137 up to 0,79 pCi/gm A '4 /

Cs-137 contamination level Is within the range associated with /

radioactive failout in the general area of the plant. %4/

Isotope Identification: Cs-137 iI The only non-primordial radlonuclide identified via gamma spectroscopy is Cs-137, which Is found in area soils as a result of fallout iI /I from weapons testing. r75-26-)

4%

N Soil Sample Location I,I 1 (Ref. Area 9521 YAECEL 9526 9526CS004 11/11/97)

I I U1 000 go 1000 (Ref. Area 9526 YAECEL 9528 9528CS004 11/19/97)

I '4 00  %/

I1 - ýf -

swray d iaCntiipln"'

Anat ClonoSuw.

9521 Southeast Pond 3 0.009 0.013 Soil Cs-137 0.596 9526 Northeast Mountain Side 3 soi Cs-137 0,79 Millennium Services Inc.

>1 70

W Landfill Areas (Page 1 of 2)

GAD 9003 Radiation Range: Gamma Radiation, 0.006 mR/hr to 0.03 mR/lu \

Gamma radiation levels are generally in the range of background radiation. The highest radiation level was approximately 2.5 to 3 times the background in the undisturbed areas.

Soil Contamination Range: Cs-137 up to 52.9 pCi/gm. Co-60 up to 5 pCI/gm, The Cs-137 concentrations In three survey areas (9536, 9537, 9538) are 9535 at the levels found In the vicinity of the plant due to fallout from Co-60 concentration in wee in one (9535) I r SALMON COVE weapons testing.

exceeds the expected DCGL.Cs-137 Maximum was also detected that survey area with the maximum concentration above the expected DCOL. -i Isotope Identification; Plant isotopes Cs-137 and Co-60 l Potential contamination In these survey areas has been the result of 9538 materials form construction activities discarded at the landfill area. The predominant plant Isotopes are Co-60 and Cs-137. Co-60 and Cs- 137 are the only plant related Isotopes identified in soil samples from these survey areas.

U (Ref.Soil OTSSample DuratekLocation.

Inc. 1/27/99) . ...................

Containment .... ,.

0* Building . ....

Continued on next page.

Millennium Services Inc.

CY Landfill Areas (Page 1 of 2)

GAD 9003 Survey Radiation Contamination Levels Area Survey Area Class Levels PCi/g Code Description

____________Min mRihour Max Medium Nuclide Max 9535 South East Landfill 1 0.011 Soil Co-60 5 Area Cs-137 52.9 9536 Construction Piles 2 0.009 0.03 Soil Cs-137 0,149 Near Rifle Range 9537 Permitted Landfill 2 0,006 0,01 Soil Cs-137 0,039 Area 9538 Material Storage Area 2 0.006 0.011 Soil Cs-137 0,119 Millennium Services Inc.

%Y Site Buildings , - (9226)J FW/STM Penetration and Radwaste Reduction Facility RADWASTE FUEL BUILDING i REDUCTION GAD 9001 TK.17 I FACILITY,,M lAkil r-I Radiation Range: Gamma Radiation, <0.5 mR/hr to 150 mR/hr The FW/STM Penetration area is external to the containment building and contains secondary side systems. The radiation levels are typical of background, The "less than" values indicate the minimum sensitivity of REACTOR K k the instruments used to perform the radiation surveys. The Radwaste CO)NTAINMENT ,

Reduction Facility (9226) maximum radiation levels are associated with processing equipment or materials within the building, LT , -~-~ 115KV ~ I NCABLEVAU4 SWITCHYARD Contamination Range: Beta emitters up to 2,000-dpm/100 cm2, No alpha emitters detected. .f*. .. l. .4k. ..

No contamination has been detected in the FW/STM Penetration building.

No systems designed to contain radioactive materials are within the A

.UX,PRIMARY BUILDING UX UIDNGK-A....." 8O PENETRATION BUILOING

• j1+ c00..-

{......."

buildings. Contamination has been recorded in the Radwaste Reduction Facility (9226). The area was designed to process potentially contaminated materials, Material processing equipment within the facility SERVICE contained internal contamination, No alpha emitting radionuclides have BUILDING been detected inthese areas. CONTROL ROOM i BOILER Isotope Identification: Plant isotopes Cs-137 and Co-60 AUXBAY ROOM Contamination in these areas has been the result of handling equipment and samples from radioactive systems. Therefore, the predominant beta emitting isotopes found in the plants are considered as those of potential concern. No alpha emitting isotopes have been detected in any of these areas.

XX Indicates dose rates-mR/hr.

Millennium Services Inc.

W Site North (Page 1 of 2)

GAD 9000 Radiation Range: Gearma Radiation at background levels Radiation levels are typical of background radiation levels from primordial nuclides In soil and rock.

Contamination Range: Cs-137 <0.18 pCi/gm to 0.238 pCi/gm Cs-137 contamination detected at levels less than 5% of the expected DCGL. Cs-137 concentrations are at the levels associated with fallout from weapons teaing. Minimum detectable concentration is at the environmental Lower Level of Detection.

hotope Identification: Cs-137 The only Isotope identified other than primordial nuclides is Cs-137.

Cs-137 is also attributed to fallout firom weapons testing.

N Soil Sample Locations (Ref Results of Seoping Surveys 9/98)

CONNECTICUT RIVER Continued on next page.

" ýj (ý Millennium Services Inc.

CY Site North (Page 2 of 2)

GAD 9000 Survey Radiation Contamination Levels Area Code Survey Area Description Class Levels mR/hour Medium pCi/g Nuclide Max Min Max Northeast Site 9502 Grounds (Non- 3 Soil Cs-137 0.407 Protected Area)

Bypass Road /

9504 Secondary Parking 3 Soil Cs-137 <0.18 Lot 9506 (Non-Protected North Site Grounds Area) 3 Soil Cs.137 0.08 9508 Pond 3 Sediment Cs-137 0,233 9510 Access Road 3 Northwest site 9512 Grounds (Non- 3 0,008 0.013 Soil Cs-137 0.238 Protected Area) 9514 Primary Parking Lot 3 0,012 0.015 Soil Cs-137 0,076 Millennium Services Inc.

CrYard Areas (Page 1 Of 2)

GAD 9000 Radiation Rfange: Garma Radiation, 0.007 mR/hr to 0.016 mR/hr The gamma radiation range Is typical of levels associated with background radiation. Radiation levels indicated with "less than" valves

.. ,--/ L.t'

. . .. Z) are indicative of the sensitivity of instrumentation used for those ............................

surveys, These survey areas are outside the Radiologically Controlled Area of the plant, Soil and Asphalt Contamination Range: Co-60 from <0.1 pCi/gmt to -'"

1.592 pCi/gm. Cs-137 from 0.04 pCi/gm to 0.775 pCI/gm.

Maximum concentrations of both Co-60 and Cs-137 are below the .

expected OCGts for the site. Cs-137 concentrations are within theN range typical of Cs-137 from fallout due to weapons testing. 11111 _

hotope Identification: Plant isotopes Cs-137, Co-60 Contamination of theses survey areas has been the result of events Involving plant releases or spills, The predominant plant isotopes Co-60 and Cs-137 dominate the Isotopic mix. Cs-134 was the only other isotope Identified in samples taken within the survey areas.

• Sample Locations '(*" e.

Sapl Loctins.............................r . ....

"- "...................... I (Rpe Area 9106 YAECEL 068836 9/22/97) . . . . ....

(Ref Area 9302 HP 99-111 9/22/97)

(Ref. Area 9304 HNP Gamma Spect, 990107011 1/7/99)

(Rd£ Area 9306 HP-586 11/2"98)

Continued on next page.

(Roe Area 9308 HNP Gamma Speot 9308CS110 1/27/99)

(Ref. Ae 9313 HP99.112 3/11/99)

Millennium Services Inc.

&Y Yard Area (Page 2 of 2)

GAD 9000

.SurveyRadiation Contamination Levels Area Survey Area Class LevelsrpCi/g Code Description

• Min Max Medium mR/hour Nuclide Max 9104 YD Main 3<0,5 Transformer Area Co-60 0,5 9106 Discharge Canal 2 <0.1 <1 Sediment Cs-134 0.024 Cs-137 0,722 Northwest Protected 3 Soil Co-60 <0,12 9302 Area Grounds Asphalt Cs-137 <0.10 Southwest Protected Soil Co-60 <0.10 Area Grounds 0 Asphalt Cs-137 0.04 South Central Soil Co-60 0.532 9306 Protected Area 2ASphlt Cs-607 0,5 Grounds Asphalt Cs-137 0,775 Southeast Protected 2 0,009 0.016 Soil Co-60 0,31 9308 Area Grounds Cs-137 0,33 Co-60 0.174 0172 9313 Central Site Grounds 3 Soil Co-607 Cs-137 1,592 Millennium Services Inc.

Radiation Controlled Areas (Ref. Area 9122 and 9124 CY Survey 4/20/82)

(PagA D of 2) (Ref. Area 9307 HNP Gamma Spect. 9/9/98)

GAD 9000 Radiation Range.: Gamma Radiation, 0.0 16 mR/hr to >100 mR/hr PRIMA Re WATR C 2 S'TORAGE TANK The radiation levels range from background values to High Radiation ST TN\2 C -2 4 Areas (>100 mR/hr), The radiation levels are predominantly due to in storage tanks and processing equipment within the areas. Dose rates excess of approximately 0.1 mR/hr prohibit the determination of total surface c ro .ntami a lpt ei ttond t ctd.

Contamination tipn/lO0 cm2. No Range:

alpha Maximum beta emitters greater than 100,000 emnitters detected, 000

-- -- . - IN..

... - ....- - - " / 1 310)92 Events associated with handling of radioactive resin, waste Processing and leakage from contaminated systems has resulted in removable (9----------------------- (IiDVI) 922 contamination In some areas. Fixed contamination In the asphalt as well REDUCTION as the soil beneath the asphalt is suspected. No alpha emitting radionucides have been detected Inthese area.

Soil and Asphalt Contamination Range! Co-60 up to 521 pCI/gm Cs.137 up to 793 pC01gm.

( T+'  : , -.

Soil and asphalt contamination resulted from handling of radioactive IK Nr IT j.....

resins, waste handling and leakage from contaminated systems.

Maximum concentrations remediated, beenexcept haveArea All areas are within r a the Radiologically Controlled dhe 115 Kv Switchyard (9102). Areas within the switchyard that were impacted by leakage , W events were controlled. PRIMARY Isotope Identification: Plant isotopes Cs.137 and Co-60 A BUIL Co-60 and Cs-137 are the predominant isotopes detected in both soil URMcE and asphalt samples in these areas. The only other gmma-emitting BtWINO Isotope identified in historical sample analysis is Cs-134, No alpha emitting isotopes have been detected in any of these areas.

E Sample Location.

(Ref. Area 9312 and 92270TS Duratek Inc. 1/27/99) Continued on next page.

(Ref. Area 9102 CY Survey 3/6/89)

'1 )

Millennium Services Inc.

&Y Radiation Controlled Areas (Page 2 of 2)

GAD 9000 Survey Radiation Contamination Levels Area Survey Area Class LevelsLpCi/g Code Description mR/hour Min Max Medium Nuclide Max YD 115KV 1 0,015 1 Soil Co-60 2.87 9102 Cs-137 4,49 Switchyard Area Co-60 521 9122 YD Primary Water 1 <0.2 5 Soil Cs-134 153 Storage Tank Area Cs-137 793 YD Backup Primary Co-60 84.8 9124 Water Storage Tank 1 <012 5 Soil Cs-134 20,2 Area Cs-137 155.2 Bus 10 Pad and5 Soil Co-60 22 9227 Ground Underneath Cs-137 735.2 9307 PAB / Service 0,016 10 Asphalt Co.60 202.4 Building Alleyway1Cs.137 97.14 East Protected Area Soil Co-60 213,7 9310 Grounds Asphalt Cs-137 3095 Northeast Protected 1 0032 >100 Aphalt Co-60 0.31 9312 7,94 Area Grounds Cs-137 Millennium Services Inc.

Cy Yard Areas (Page 1 of 2)

GAD 9000 Radiation Range: Gamma Radiation, <0.2 mR/hr to 300 R/hr Gamma radiation inthe area of the fuel oil tank and the demin water storage tanks were measured at levels up to 0.5 mR/hr, All other structures are designed to contain radioactive materials and included water processing equipment. Maximum values are associated with radioactive resins that have been/will be disposed of as radwaste.

Access to the structures has been controlled. The area outside the structures (9126) is within the Radiologically Controlled Area. Dose rates in excess of approximately 0.1 mR/hr prohibit the determination of total surface contamination, Contamination Range: Beta emitters up to 675,000-dpm/100 cm2.

Alpha emitters up to 6,000-dpm/100 cm2.

Removable beta contamination has been measured at levels greater than 100,000 dpm/100 cm2 in four survey areas (9112, 9114, 9116, 9120).

Remediation activities in areas of high dose rates were not warranted, Areas of high removable contamination were posted and controlled.

Alpha contamination was measured at levels greater than 500-dpm/100 cm2 in the same four survey areas. Three survey areas (9120, 9126, 9128) had no detectable removable contamination.

Isotope Identification: Plant isotopes Cs-137, Co-60 and Am-241 Contamination of theses survey areas has been the result of leakage from systems containing primary coolant or water processing resins.

The predominant plant isotopes Co-60 and Cs- 137 dominate the Isotopic mix, The alpha contamination levels indicate the presence of Am-241 as well as other transuranics.

O Indicates removable contamination ievels-dpm/100cm2.

XX Indicates dose rates-mR/hr. Continued on next page.

Millennium Services Inc.

Cy Radiation Controlled Areas (Page 2 of 2) Radiation Contamination Levels: Contamination Levels Survey Survey Area Class Levels Beta/Gamma Alpha GAD 9000 e Description mR/hour DPM/100cm2 DPM/100cm2 Code Min Max Min Max Min Max 9108 YD North Tank farm 1 08 >100 ND 10000 ND 60 Area (<1000) (<20)

ND 132 9110 YD South Tank Farm 1 2 >10 ND1 00 0 ND Area (<1000) (<20) 9112 Y. oo SoaeND YDBoronStorage 1I s >100 (<1000) >100000 ND

(<20) >500 Tank Area >0 9114 YD Ion Exchange I I >100 ND >100000 ND >500 Area (<1000) (<20)

ND >000 ND >0 9116 YD Resin Slurry Area 1 <0.2 >100 (<1000) >100000 (<20) >500 9118 YD Fuel Oil Tank 3 <0.5 Area 9120 YD Primary Vent 1 <0.2 70 >100000 ND >500 Stack (<20) 9126 YD Large Yard Crane 1 <0.2 20 ND Area (<1000) 9128 YD Demin Water 1 <0,2 <5 ND Storage Tank Area (<1000)

'I Millennium Services Inc.

%I Site Buildings (Page I of 2)

GAD 9001 Radiation Range: Gamma Radiation <1 mR/hr Radiation levels are Indicative of background radiation. No radioactive system or equipment are in these areas. All buildings are outside the 1 industrial ares. Variations in Instruments used for surveys resultsI in a (EM differences Inminimum exposure rate levels.M Contamination Range: No detectable beta contamination. No %If detectable alpha contamination. 'I I Ir!

These facilities are outside the Industrial area and am maintained as non-contaminated areas. Contamination materials have been stored in al a two areas (9410, 9404), but no building contamination has been detected In those areas. Surveys performed included both swipes for removable contamination and direct measurements (flisks) for total activity. No beta or alpha emitting radionuclides were detected in any of these survey areas. ......

Isotope Identification: Plant isotopes Cs-137 and Co-60 Since limited positive readings of any type have been obtained, the predominant beta emitting isotopes found in the plant are considered as those of potential concern. No alpha emitting isotopes have been detected Inany of these areas,

• Soil Sample Location. Arees Not Shown (Ref. Area 9418, Duke 071263 215/98) 94 Eergency Operadon Center Roof Area 9418 Concrete/Soil Sample: Cs-137 <0,18 pCi/g j informaton Center Roof m Roof Sample Location. C All Buidlngs In the Southwest Site (Ref. Area 9403, HP 99-126 3/29/99) Storage Area Area 9403 Roof Samples: Cs-137 <0.18 pCi/g XX Indlcatu dose ratas-mR/hr.

Millennium Services Inc.

(cc'

Cy Site Buildings Survey Survey Area Survey Area Class ls Radiation Levels Contamination Levels Beta/Gamma Contamination Levels Alpha (Page 2 of 2) DPM/l00cm2 DPM/100cm2 Code Description mR/hour GAD 9001 Min Max Min Max Min Max 9402 Emergency 3<ND ND Operations Facility (<57.2) (<20)

Emergency 9403 Operations Center 3 Roof 9404 North Warehouse 3 <0.2 ND ND

(<57.2) (<20)

ND ND 9406 South Warehouse 3 <0.2(<7)<2 (< 57.2) (<20 )

9408 Miscellaneous Trailer <0.2 ND ND Complex (<57.2) (<20) 9410 Steam Generator 3 <0.2 (<ND57.2) ND

(<20)

Mockup Building 9412 Training Stores 2 <0.2 ND ND Office Building (< 57.2) (<20) 9414 Warehouse #1 3<0.2 (<ND57.2) 132 ND ND 9416 Warehouse #2 3 <0,2 (<3D72) (<20) 9418 Building #3 Officeand 3 <0.2 ND ND PAP (<57.2) (<20)

ND N 9420 Office Trailer 3 <0.2 (<57.2) (<20)

ND 9422 Information Center 3 <0.2 (<ND57.2) (<20) 9423 Information Roof Center All Buildings 9424 Contained in the H3<1(10)ND Southwest Site<(<1000) (<20)

Storage Area Millennium Services Inc.

%IF Site Buildings (Page 1 of 2)

GAD 9001 Radiation Range: Gamma Radiation <0.5 mR/hr Radiation levels are Indicative of background radiation. No radioactive systems or equipment are in these areas. The Unconditional Release Facility and the HP Count Module were used to monitor for low levels of radioactivity on materials or in 9228 samples. Radiation levels were required to be maintained at low-C-NDON_,

levels to allow for low level monitoring and counting. Variations < .1 FACILITY in instruments used for surveys results in differences in minimum 93REACTOR exposure rate levels. CONTAINMENT Contamination Range: Beta emitters up to 5000-dpm/100 cm2 u tWITCHYARD 8K (9228). No detectable alpha contamination, These facilities were maintained as non-contaminated. Any 2o-, ,

radioactive contamination detected resulted in immediate remediation. The only detectable contamination found inany of [/1 AUX. BUILDING these facilities was in the Unconditional Release Facility. 9-I-. __

Identification of low levels of contamination on materials being processed would result in that material being returned for SERVICE CONTROLB decontamination or disposal as radwaste. Identification of low levels of contamination in the facility required area DIESELROOMBOILER decontamination and resurvey to verify satisfaction of clean area AUX. BAY criteria. Surveys performed included both swipes for removable contamination and direct measurements (frisks) for total activity.

No alpha emitting radionuclides were detected in any of these survey areas.

TURBINE BUILDING Isotope Identification: Plant isotopes Cs-137 and Co-60 Since limited positive readings of any type have been obtained, the predominant beta emitting isotopes found in the plants are- <U considered as those of potential concern. No alpha emitting S BUILDN fUILDINGt isotopes have been detected in any of these areas.

O Indicates removable contamination levels-dpm/100cm2.

NJ Indicates dose rates-mR/hr. Continued on next page.

Millennium Services Inc.

CY Site Buildings (Page 2 Of 2) SuvyRadiation Contamination Levels Contamination Levels Survey Survey Area Class Levels Beta/Gamma Alpha GAD 9001 Code Description mR/hour DPM/100cm2 DPM/100cm2 Min Max Min Max Min Max 9202 Switchgear Building 3 <0.2 ND "B" (<57.2)

Administration 3 <0.2 ND ND 9208 Building (< 57,2) (<20) 9214 Shutdown Auxiliary 2 Feed Pump House Unconditional I ( ND<0. (<D.02)ND 9228 Release Facility 2<0.1) 5000(<892)

ND ND 9234 HP Project Trailer 2 <0.5 (<1000) (<20)

ND ND 9236 HP Count Module 2 <0.5(N0)<2 II(<1000)J--(<20)

Millennium Services Inc.

CY Screenwell House Elevation 8'-0", 21 '-6", 36'-6" (Page 1 of 2)

GAD 7000 Radiation Range: Gamma Radiation <0.1 mR/hr (Background level)

General radiation levels through these survey areas are representative of :9AF background radiation.

ROOELAIO... .

Removable Contamination Range: Beta emitters <1,000-dpm/100 cm2. No alpha emitters detected (<20 dpm/100 cm2)

The survey areas are outside the Radiologically Controlled Area boundary. Surveys for removable contamination have not detected either beta or alpha emitting radionuclides above the site limits for non ROOF EILEVATION 36'-8" contaminated areas (i.e. removable beta contamination <1000 dpm/100 cm2, removable alpha contamination <20 dpm/100 cm2).

/ i M Indicates dose rates-mR/hr.

77 ~ QAI - -,

59.,". ' -,. i.i ;4 * **l, !:

Li I I ELEVATION 8'-0" ELEVATION 21'-6" Continued on next page.

Millennium Services Inc.

Screenwell House Elevation 8'-0", 21 '-6", 36'-6" (Page 2 of 2)

GAD 7000 Radiation Contamination Levels Contamination Levels Survey Survey Area Class Levels Beta/Gamma Alpha Code Description mR/hour DPM/100cm2 DPM/100cm2 Min Max Min Max Min Max ND Pump A&B<01 7002 CW0CircHead (<ND0 57.2) <1(<14,)

CW Cir0 Pump C&D 3 <0I ND0 ND 7004 Head D (< 57.2) (<14.)

7102 W CircAPump Motor 3 <0,1 ND<2 (000ND A&B (<57.2) <1000 4) 7104 Pump Moto WCiroC&D 3 <0,1 (<ND,)ND 1(<14.)

(<57.2) 7106 CWTank Hypochlorite 3 <0,1 (< ND 57.2) <1000 ND

(<14.)

Area CW Intake and ND ND 7108 Screen Area 3 <0,1 (<57.2) <1000 (<14.)

ND ND 7202 CW Roof Area 3 <0.1(52 <1000(<4 (<14.)

II I(< 57.2)1 <

Millennium Services Inc.

OrWaste Disposal Building Elevation 0'-0", 12'-6", 18'-6",

36'-6"6ooo_ & Roof (Page 1 of 2) _ _

GAD 6000 1%U - U9n 600 s 2k Radiation Levelsa Gamma Radiation I mR/hr to >100 mR/hr The building contained equipment designed to process radioactive Bk liquids and gases. Radiation levels In access hallways range from I 1 0 mR/hrto 10 mR/hr. The highest radiation levels, up to 600 mR/fr, are associated with equipment such as the degassifter and associated valves, Dose rates in excess of approximately 0,1 mR/hr prohibit the determination of total surface contamination, 0 100 cm2. Alpha Removable emitters up to Contamination >500 dpn/100 Range: cm2.up to >100,000 dpm/

Beta emitters 1712 -M- =]0 r

• k ft Contamination on sudaices of the survey areas results from system leakage or maintenance activities that required accessing the Internals of components or systems. Due to high radiation levels, decontamination of areas following repair of leaks or system openings was not ELEVATION 0'-0" ELEVATION 18'-$ & 12.-6 warranted, Both beta and alpha emitting radlonuclides have been detected in swipe surveys. Three survey areas contain beta contamination greater than 100,000 dpni/100 cm2 (Area 6006, 6306, 6412). Seven survey areas contain alpha contamination greater than 500 dpm/100 cm2 (Areas 6004, 6006, 6306, 6308, 6312, 6408, 6412).

Isotope Identification: Co-60, Cs-137, Am-241 T

2004=04 Ok L J M Core Sample Location. Ok (Ref OTS Duratek, 1/27/99) CUM 4k from concrete core bore, Core Bore Sample: Isotopic analysis data gamma spectroscopy, Cs-137 approximately 60% of mix, Co-60 approximately 36%. Presence of Am.241 implies the presence of transuranic radionuclides. (Refer to smear analysis next page,)

so 7 Elev ndon 12'6"

>-) Smear Location, (Ref. Thermo NUtech. DAW-A4, N7.06-061 4/11/97)

ELEVATION 35'-60 ROOF 0 Indicates removable contamination IevoIs-dpm/100cm2.

Continued on next page.

XN Indicates dose rates-mR/hr.

NAlillsnniirn *AV1AeQ Tnc.

vice SerJI*k**,ALkw* Inc Milnnu

%IF Waste Disposal Building Elevation 0'-0", 12'-6", 18'-6",

36'-6" & Roof (Page 2 of 2)

GAD 6000 Survey Radiation Contamination Levels Contamination Levels Area Survey Area Class Levels Beta/Gamma Alpha

'-J General Area Smear Analysis Code Description mR/hour DPM/100cm2 DPM/100cm2 Min Max Min Max Min Max Waste Disposal ND ND Nuclide jýCi/Sample 6002 Building Hall Area 1 <2 60 (<1000) 24000 (<20)

H-3 5.585 E-05 Lower Level C-14 9.451 E-05 Waste Disposal Pu-241 6.010OE-05 6004 Building Area 1 0.6 80 ND 80000 ND >500 Outside Reboiler (<1000) (<20)

Room Am-241 3.359 E-07 Waste Disposal Cm-243, 244 2.375 E-07 6006 Building Bottoms 1 18 >100 3000 >100000 ND >500 Mn-54 1.210 E-05 Pump and Reboiler (<20)

Area Co-60 2.140 E-05 Waste Disposal

<2 20 ND 30000 ND Cs-134 2.892 E-05 6008 Building Sump Trench Area Lower 1

<<2000(<20)

Cs-137 8.634 E-05 Level Waste Disposal Gross Beta 1.042 E-04 6010 Building-Waste 1 <2 >100 ND 4000 ND 480 Decay Tank A,B,C (<1000) (<20)

Area Waste Disposal ND 6012 Building Surge Tank 1 <2 120 (<N000) 6000 (<20) I Area Lower Level 6102 Waste Disposal 1 <2 2 ND ND Building Hall Area (<1000) (<20) I Waste Disposal ND ND 6202 Building Hallway 1 2 (<1000) (<20)

Area (<_000)_(<20)

Waste Disposal ND ND 6304 Building Evaporator 1 <2 >100 (<N000) 10000 (<20)

Area I(<1000)

Millennium Services Inc.

CY Service Building Elevation 41'-6" and 59'-6" (Page 1 of 2) i GAD 5200

- - -*'*'*-' r Radiation Levels: Gamma Radiation <1 mR/hr.

Radiation levels are indicative of background radiation. No radioactive systems or equipment are in these areas. The "less than" value represents the minimum detectable radiation levels based on the instruments used to perform the surveys. ---ILI* Ii L .- I .. . -l1,*

• S....L*i..  ;:

r'L

-:* 4;:

-:-1 Contamination Levels: No beta emitting or alpha emitting radionuclides have been detected In these survey areas. III The areas were maintained as non-contaminated areas. No radioactive n.a n-p-a contamination has been detected on the surfaces of these survey areas.

Surveys performed included both swipes for removable contamination MEZZANINE FLOOR and direct measurements (frisks) for total activity. ELEVATION 41'-$"

Isotope Identification: Plant isotopes Cs-137 and Co-60 Since no positive readings of any type have been obtained in these survey areas, the predominant beta emitting isotopes found in the plants are considered as those of potential concern. No alpha emitting isotopes have been detected in any of these areas.

M Indicates dose rates-mR/hr.

OPERATING FLOOR ELEVATION 59'-6" Areas Not Shown Service Building Roof IContinued on next page.

Millennium Services Inc.

Cy Service Building Elevation 41'-6" and 59'-6" (Page 2 of 2)

GAD 5200 RSadiation Contamination Levels Contamination Levels Survey Survey Area Class Levels Beta/Gamma Alpha Code Description mR/hour DPM/I00cm2 DPM/l00cm2 CrMin Max Min Max Min Max 5202 Service Building 3 <1 ND <1000 ND Switch Gear Area (<57.2) (<20) 5302 Service Building 3<1 ND <1000 ND Control Room Area (<57.2) (<20)

Service Building 5304 Computer, 31 ND <1000 ND Operations, Security (< 57.2) (<20)

Area Service Building ND ND 5306 Machine and 2 <1 (<57.2) <1000 (<20)

Equipment Area Service 5308 Work Building ND 1000 ND Control Center 2 <1 (<57.2) <1(<20) 5402 Service Building 2 <0 (5<7I2ND Roof (<57,2)

Millennium Services Inc.

CY Aux Boiler Room and Diesel Generator Bid.

Elevation 21'-6" (Page 1 of 2)

GAD 5101 Lm--

Radiation Levels: Gamma Radiation <1 mR/hr, Radiation levels are indicative of background radiation. No radioactive systems or equipment are in these areas, Minor contamination of the MAWNTINAN ISHOP

.<.1!s internals of the auxiliary boilers has been detected, however the boilers are to be removed from the survey area. The "less than" value represents the minimum detectable radiation levels based on the instruments used to perform the surveys.

<1 Contamination Levels: No beta emitting or alpha emitting radionuclides have been detected in these survey areas. !a 7' r71u - The areas were maintained as non-contaminated areas, Radioactive L--

AUX,SOtLMI ROOM contamination was detected on the internals of the auxiliary boilers, ---

i -n I- i which will be removed from the area prior to final survey, No radioactive contamination has been detected on the surfaces of these S.

. .. .. .. _1, survey areas. Surveys performed included both swipes for removable contamination and direct measurements (frisks) for total activity.

( Isotope Identification: Plant isotopes Cs-137 and Co-60 "DIESELGENERATOR 2A ] '11 Since no positive readings of any type have been obtained in these survey areas, the predominant beta emitting isotopes found in the plants Apt are considered as those of potential concern, No alpha emitting isotopes have been detected in any of these areas.

t~v m

~0OE$9L GENERATOR 20 SIndicates dose rates-mR/hr.

Continued on next page.

Millennium Services Inc.

CY Aux. Boiler Room and Diesel Generator Bld.

Elevation 21V-6" (Page 2 of 2)

GAD 5101 SuvyRadiation Contamination Levels Contamination Levels Survey Survey Area Class Levels Beta/Gamma Alpha AreaCas Code Description mR/hour DPM/100cm2 DPM/100cm2 Min Max Min Max Min Max Service Building "A" ND ND 5102 Diesel Generator 3 <1 (< 57.2) <1000 (<20)

Area(7 Service Building "B" 5104 DieselrGenerator 3 <1 (< 57,2) <1000 (<20)

Area(<72(<0 Service Building ND ND 5124 Maintenance Clean 2 <1 (< 57.2) <1000 (<20)

Shop Area Service Building "A" 2 <1 ND <1000 ND 5126 Auxiliary Boiler Area (<57.2) (<20) 5128 Service Building "B" 2 <1 ND <1000 ND Auxiliary Boiler Area (<57.2) (<20)

Millennium Services Inc.

%IF Service Building Elevation 21 '-6" and 35'-4" (Page 1 of 2)

GAD 5100 Radiation Range: Gamma Radiation up to 2 mR/hr The area consists of support facilities for the Radiological Control Area.

Radiation levels typically represent background levels isolated area within the Service Building Maintenance Decon Area (5118). Radiation levels in that area approach 2 mR/hr due to contaminated decontamination equipment in the area. The area contains the RCA control point, offices, locker rooms, laboratory and counting facilities J that have been maintained as non-contaminated areas and that contain no systems containing radioactivity other than laboratory drains designed for contaminated waste,

• * . ME$

Contamination Range: Beta emitters up to 30,000-dpm/100 cm2. No alpha emitters detected. 1I3 Contamination has been recorded in the Counting Room (5132),

Radioactive Chemlab (5114), Service Building Maintenance Shop 6W DISPOSAL Clean Area (5122), and Service Buildtng Maintenance Deconsuchas Area (5118). The areas are designed for work with contaminated equipment .... L-and are within the Radiological Control Area, Support areas such as----

offices, locker rooms and the RCA control point have been maintained "

as clean areas. No alpha emitting radionuclides have been detected in LOCKEROOM these areas.

Isotope Identification: Plant isotopes Cs-137 and Co-60 Contamination in these areas has been the result of handling equipment Si and samples from radioactive systems, Therefore, the predominant beta emitting isotopes found in the plants are considered as those of potential concern. No alpha emitting isotopes have been detected In any of theseA areas, T . T O Indicates removable contamination levels-dpm/100cm2.

M Indicates dose rates-mR/hr.

Continued on next page.

Millennium Services Inc.

(

CY Service Building Elevation 21 '-6" and 35'-4" (Page 2 of 2)

GAD 5100 Millennium Services Inc.

cy Turbine Building Elevation 59'-6" (Page 1 of 2)

GAD 4400

( 2' -

Radiation Range: Gamma Radiation <0,02mR/hr (Background level)

General radiation levels through these survey areas are representative of background radiation, II ... LT%-- .TL., m j* .----- -1.. --o

...... O2 * -a+*..

Removable Contamination Range: Beta emitters <1,000-dpm/100 cm2.

No alpha emitters detected (<20 dpm/100 cm2) .11 I °"

I U ,- a ....- No.3P4404 .. - . N

! orNoA4!s.itter

-b L .. - .. -.::*- ............-

£I*

ii The survey areas are outside the Radiologically Controlled Area boundary. .2 Surveys for removable contamination have not detected either beta or alpha I....... I - ,

mi.............. * ..... * .. .... t.. ..... -- --

42 emitting radionuclides above the site limits for non-contaminated areas (I.e.

removable beta contamination <1000 dpm/100 cm2, removable alpha contamination <20 dpm/100 cm2). I C*]*3 .... i iid--- -I ii I7 r'"F ' ... ' i.iL, rn rill Fixed Contamination Range: Beta <5000-dpm/100 cm2 averaged over I m2. No alpha emitters detected.

Extensive surveys of more than 1500 m2 of the floor space (more than

,, -' . ,- ,7 475,000 measurements) identified no single 100-cm2 area of greater than .--. a, a a .......

a

. .. . i... ' nil I --

a .. a ...... .....

.. ..... . a a, aS aE - -a-a-s t,...*-I.*

10,000 dpm and no one square meter with average radioactivity greater than .2+ .. .

I tE0 ,_a*.B I

5000 dpm/l100 cm2. No other areas were identified that would approach the 0-1L..i 0.* 4 expected DCGL values. Fixed contamination has been detected within ,- ... 1 ~.-.... .. No_

I

... ... *wM@.

GE) mGED~

..... ..... ... .... .. ... l* ....

systems as a result of Steam Generator tube leakage. Systems impacted are . AH. NW .. . .. .. ..... .. . .. .. ....... ...

primarily associated with the high-pressure steam components, Maximum

-I fixed beta measurement from the interior of components was approximately IiI*

450,000 dpm. Alpha surveys results indicated less than Minimum Detectable Activity for all surveys.

Isotope Identification: Predominant Isotopes: Cs-137, Continued on next page.

The only isotope identified In components contaminated as a result of steam generator tube leakage is Cs-137. No alpha emitting nuclides have been Identified.

XX Indicates dose rates-mR/hr.

Millennium Services Inc.

cy Turbine Building Elevation 59'-6" (Page 2 of 2)

GAD 4400 Survey AreaCls Code Survey Area Description Class Min Radiation Levels mR/hour Max Contamination-Levels Beta/Gamma DPM/100cm2 Min Max Contamination Levels Alpha DPM/100cm2 Min Max Turbine Building ND ND 4402 Laydown Area North 2 0.02 (< 57.2) <1000 (<20)

Floor Turbine Building Steam Generator ND2 .ND 4404 Feedwater Heater 3A 2 0,02 (<57.2) <(<20)

Area Turbine Building 4406 Steam Generator N,)

N20.02 D(< (<00)ND Feedwater Heater 4A 2<57.2) <(<20)

Area Turbine Building Steam Generator 2 0 (DN02 10000ND 4408 Feedwater Heater 3B 2(<57.2) 1(<20)

Area Turbine Building Steam Generator ND<

N20.02 7, 002ND 4410 Feedwater Heater 4B 2(<57.2) <(<20)

Area.. ............ ........

4412 Turbine BuildingHYP 2 0.02 ND <1000 ND Turbine Area (< 57.2) (<20) 4414 Turbine Building L.P. 2 0.02 ND <1000 ND

1. I Turbine Area (< 57.2) (<20) 4416 Turbine Building L.P, 2 002 ND <1000 ND

1. 2 Turbine Area (< 57.2) (<20) 4418 Turbine Building 2 002 ND <1000 ND Generator Area (< 57,2) (<20) 4420 Turbine Building 2 0.02 ND <1000 ND Exciter Area' (<57.2) (<20)

Turbine Building ND ND 4422 Laydown Area South 2 0.02 (< 57.2) <1000 (<20)

Floor 4424 Turbine Building 20,02 ND(1 000ND Open Hoist Area (<57.2) <(<20) 4502 Turbine Building 2 002 ND7, < 002ND Ceiling Area (<57.2) <(<20)

Turbine Building 2 0,02 (<D57.2) 4603 Roof Area ND7 <10001 (<20)

Millennium Services Inc.

CY Turbine Building Elevation 47'-0"

,ljLi .._.* 0,_02

-I GAD 4300 Radiation Range: Gamma Radiation <0.02 mR/hr (Background level) ,A.... ,

General radiation levels through these survey areas are representative of background radiation.

-~ ~~~ - - - ----a-- - in- -- -~S f Removable Contamination Range: Beta emitters <l,000-dpm/100 cm2. No alpha emitters detected (<20 dpm/100 cm2) A*.

The survey areas are outside the Radiologically Controlled Area - f i fL..Ti*.:_* ..

//I.:-

I!

boundary. Surveys for removable contamination have not detected either beta or alpha emitting radionuclides above the site limits for non contaminated areas (iLe, removable beta contamination <1000 dpm/100 ,I i /ii) ,

cm2, removable alpha contamination <20 dpm/100 cm2).

Fixed Contamination Range: Beta <5000 dpm/100 cm2 averaged over ItI

- f ....

1 m2. No alpha emitters detected. l .,.. . .  : -4 . . .. ..... .... .

I.-.  ::  :

Surveys performed for beta emitters did not detect radioactivity levels above the Minimum Detectable Activity values for instruments used - - S (MDA <5000 dpm/100 cm2) Fixed contamination has been detected within systems as a result of Steam Generator tube leakage. Maximum contamination level found on component interior surface was approximately 7500-dpm/100 cm2, Systems impacted are primarily associated with the high-pressure steam components. Alpha surveys results indicated less than Minimum Detectable Activity for all surveys, Isotope Identification: Predominant Isotopes: Cs- 137.

The only Isotope identified in components contaminated as a result of steam generator tube leakage is Cs-137, No alpha emitting nuclides have been identified, XX Indicates dose rates-mR/hr.

Millennium Services Inc.

%IF Turbine Building Elevation 37'-6" (Page 1 of 2)

GAD 4200 Radiation Range: Gamma Radiation <0.02 mR/hr (Background level)

General radiation levels through these survey areas are representative of background radiation.

Removable Contamination Range: Beta emitters <1,000-dpm/100 cm2.

No alpha emitters detected (<20 dpm/100 rcm2)

The survey areas are outside the Radiologically Controlled Area boundary. .i Surveys for removable contamination have not detected either beta or alpha-emitting radionuclides above the site limits for non-dontaminated areas (i.e.

removable beta contamination <1000 dpm/100 cm2, removable alpha , ..-

contamination <20 dpm/100 cm2),

Fixed Contamination Range: Beta <5000 dpm/100 cm2 averaged over I m2. No alpha emitters detected. GD Surveys performed for beta emitters did not detect radioactivity levels above the Minimum Detectable Activity values for instruments used (MDA <5000 lI S dpm/100 cm2) Fixed contamination has been detected within systems as a result of Steam Generator tube leakage. Systems impacted are primarily I i" associated with the high-pressure steam components. Alpha surveys results indicated less than Minimum Detectable Activity for all surveys, I Isotope Identification: Predominant Isotopes: Cs-137.Oe noAres The only isotope identified in components contaminated as a result of steam .

generator tube leakage is Cs-137. No alpha emitting nuclides have been identified, IN Indicates dose rates-mR/hr.

Continued on next page.

Millennium Services Inc.

CY Turbine Building Elevation 37'-6" (Page 2 of 2)

GAD 4200 Radiation Contamination Levels Contamination Levels Survey Survey Area Class Levels Beta/Gamma Alpha Code Description mR/hour DPM/100cm2 DPM/100cm2 C_Min Max Min Max Min Max Turbine Building ND <10 4202 North End Open Area 2 0.02 (7 (1000<20 (Walls & supports) (< 57.2) (<20) 4204 Turbine Building Oil 2 0.02 ND <1000 ND Reservoir Area (<572) (<20)

Turbine Building S/IN 4206 Feedwater Heater 2A 2 0.02 ND <1000 ND and 2B Area (<57,2) (<20)

Turbine Building S/G0 ND <10 4208 Feedwater Heater 1A 20,02 <57.2) <1000(<20) and 1B Area<I Turbine Building 4210 Steam Generator Feedwater ND 1000 ND Control 2 0.02 (<57,2) <1(<20)

Valve Area Turbine Building ND ND 4212 South End/Turbine 2 0.02 (<57.2) <1000 Hall _ 57 ,2)_(<

_ 20)

Turbine Building S/0 0.02.ND ND

<1000ND

<1000 4216 Feedwater Heater 6B 2 0,02 (< 57.2) (<20) and 5B Area_(_20) 7Turbine Building S/GU ND <1000 4218 Feedwater Heater 6A 2 0,02 (<57.2) <1000<20) and_5AArea (_ 57,2) _ _20)

Millennium Services Inc.

cy Turbine Building Elevation 21'-6" (Page 1 of 2)

GAD 4100 I I I 4 I 1

• ,im" * * .7..._--

• .* :. wwm Radiation Range: Gamma Radiation <0.OlmR/hr (Background level) I14 Hy*,.4n&Ufltt General radiation levels through these survey areas are representative of [1 r-'u Oiretorol*ln ..

background radiation. 471

--r FdhP ftm tf" Tank (4112m

• m Removable Contamination Range: Beta emitters <1,000-dpm/100rcm2, I.1 ---- -- A- -.... -............-. I ..-

---r -,.- / ,

-j1&.

No alpha emitters detected (<20 dpm/100 cm2) Him 0mm .It rOin peaf

.r The survey areas are outside the Radiologically Controlled Area boundary. IiI Surveys for removable contamination have not detected either beta or alpha emitting radionuclides above the site limits for non-contaminated areas (i.e.

removable beta contamination <1000 dpm/100 cm2, removable alpha I~i Puff" contamination <20 dpm/100 cm2).

Fixed Contamination Range: Beta <5000-dpm/100 cm2 averaged over V *m , _ _ __

I m2. No alpha emitters detected.

!:2k1K Extensive surveys of more than 1600 m2 of the floor space (more than 500,000 measurements) identified one discrete area of 16,646 dpm within a 100-cm2 area. The area was remediated, No other areas were Identified that would approach the expected DCGL values. Fixed contamination has been detected within systems as a result of Steam Generator tube leakage. Systems impacted are primarily associated with the high-pressure steam components, Q&1 Cond SI s

I 1 -__

.. .2--.

I Alpha surveys results indicated less than Minimum Detectable Activity for all surveys.

Isotope Identification: Predominant Isotopes: Cs-137.

The only isotope identified in components contaminated as a result of steam generator tube leakage is Cs-137. No alpha emitting nuclides have been Continued on next page.

identified, XX Indicates dose rates-mR/hr.

Millennium Services Inc.

CY Turbine Building Survey Code Survey Area Description Class Radiation Levels mR/hour Contamination Levels Beta/Gamma DPMI/00om2 Contamination Levels Alpha DPM/100om2 Elevation 21'-6" (Page 2 of 2) Min Max Min Max Min Max GAD 4100 4102 Turbine Building 2 0.01 ND <1000 ND North Floor Area (< 57.2) (<20)

Turbine Building Oil ND ND 4104 Room, Heater Drains, 2 0.01 (< 57.2) <1000 (<20)

Emergency Power 4106 Turbine Building Air 2 0101 ND <1000 ND Compressor Area (<57.2) (<20)

Turbine Building ND ND 4108 Steam Generator Feed 2 0.01 (<57.2) <1000 (<20)

Pump Area( I2I Turbine Building ND ND 4108 Steam Generator Feed 2 0.01 ND2 <1000(20 Pump Area (<57.2) (<20)

Turbine Building ND ND 4110 Chemistry/Closed 2 0.01 (< 57.2) <1000 (<20)

.CoolingWater Area Turbine Building ND ND 4112 Water Treatment 2 0.01 (<57.2) <1000 (<20)

Area (< 57.2)_(<20)

Turbine Building ND ND 4114 Condenser Pump and 2 0.01 (<57.2) <1000 (<20)

South Floor Area Turbine Building ND ND 4116 Hoist/Equipment 2 0.01 (<57.2) <1000 (<20)

LaydownArea Turbine Building ND ND 4118 Condenser "A"Water 2 0.01 (<57.2) <1000 (<20)

Box "A & B" Area (_ .2_<0 Turbine Building ND ND 4120 Condenser "B"Water 2 0.01 (<57.2) <1000 (<20)

Box_"C_&_D"_Area (< 57.2) (<20)

Turbine Secondary Building 2 0.01 ND ND 4121 Chem Lab (<57.2) _<000(<20)

Millennium Services Inc.

CY Containment Building Elevation 48'-6" (Page 1of 2)

GAD 3300 42k)

Radiatlon Rangeý Garma Radiation <CI.lmR/hr to >100 mM ..- ..

General radiation levels ranged from <ImR/hr to >100 mR/hr. The containment has been NJ maintained as a High Radiation Area (>100 mR/hr), The radiation levels are associated with I pumps, and primary primary system components such as the steam generators, reactor coolant system piping, Dose rates in excess of approximately 0.1 nR/rr prohibit the determination of total " q7k surface contamination.

Removable Contamination Range: Beta emitters up to >100,000 dpm/100 cm2. Alpha emitters up to >SO06dpu/1 00 cm2. i The survey areas within the containment building have been maintained as contaminated areas (i.e. removable beta contamInation >1000 dpmt/100 ci2, and/or removable alpha contamination

>20 dpm/100 cm2). Area contamination has resulted from system leakage during normal operation, component maintenance and fueling activities. Removable beta contamination of .,d.,

>100,000 dpm/100m*2 have been measured in Areas 3302, 3312, 3313, 3320, 3322, 3324, and 3326. Removable alpha contamination of >500-dpm/t00 cm2 have been measured InAreas f 3311,3312,3313,3320,3322,3324. Areas 3315 and 3326 have no documented removable alpha contamination.12 Isotope Identification: Predominant Isotopes: Co-60, Cs-137, Am-241 Isotopic analysis of a swipe sample indicated Co-60 as the predominant gamma-emitting isotope, with a Co-60 to Cs-137 ratio of 75:1. Am-241 has been identified in the swipe survey samples,

\ Smear Location.

(Ret Thermo NUtech, DAW-A2, N7-06-061 4/11/97)

O Indicates removable contamination leveti-dpm/100cm2.

Xa Indicates dose rata-mR/hr.

Continued on next page.

Millennium Services Inc.

CLevels Radiation Contamination Levels Alpha Levels Contamination CY Containment Building Elevation 48'-6" (Page 2 of 2)

Survey Code Survey Area Description Min mR/hour Max Beta/Gamma DPM/100cm2 Min Max DPM/I00cm2 Min Max Containment ND ND GAD 3300 3301 Enclosure #I Outside 1 <1 35 ND0 42000 ND1385 Crane Charging Floor (<1000) (<14.1)

Containment ND ND 3302 Enclosure #2 Outside 1 <1 80 (<1000) >100000 (<14,1) 400 Crane Charging Floor Containment ND ND 3303 Enclosure #3Outside 1 <1 15 (<N000) 40000 (<14.1) >500 Crane Charging Floor((

J Charging Floor Smear Analysis Containment ND ND 3304 Enclosure #4Outside 1 <1 20 (<1000) 17000 (<14N1) 275 Nuclide p.Ci/Sample Crane Charging Floor Fe-55 5.184 E-03 Containment ND ND 3311 Enclosure#1 Inside 1 <1 >100 (<1000) >100000 (<14.1) 500 Ni-63 1.014 E-03 Crane Charging Floor(<

Sr-90 7.775 E-06 Containment ND ND Pu-238 5.117 E-06 3312 Enclosure #2 Inside I <1 22 (<1000) >100000 (N14,1) >500 Crane Charging Floor Pu-239, 240 1.490 E-06 Containment ND ND Pu-241 1.730 E-04 3313 Enclosure #3 Inside 1 1 >100 (<1000) >100000 (<14.1) >500 Crane Charging Floor Am-241 7.108'E-06 Containment ND ND Cm-242 8.796 E-07 3314 Enclosure #4linside 1 <1 30 ><1000)>100000

<14,I) 328 Crane Charging Floor (<00)(.41 Cm-243, 244 4.217 E-07 Containment Mn-54 1..106 E-04 Enclosure Removable 1 4 >100 6000 18000 <20 15 Orating for RX Head Co-60 5.104 E-03 Staging -- ,

Cs-134 1.011 E-04 Containment 3320 Enclosure CTMT Rx 1 2,5 >100 1000 >100000 <20 >500 Cs-137 3.195 E-04 Refuel Canal to Spent 4.199 E-05 Fuel Pit Gross Alpha Containment Gross Beta 8.441 E-03 3322 Enclosure CTMT 1 10 >100 1000 >100000 44 >500 Reactor Refueling Cavity Containment ND ND 3324 Enclosure CTMT 1 4 >100 (<1000) >100000 (<14.1) >500 Reactor Vessel Area (

Containment 3326 Enclosure Upper Cor 1 >100 >100000 Package Storage Area Millennium Services Inc.

CY Containment Building A

(

Elevation 22'-0" (Page 1 of 2)

GAD 3200 Radiation Range: Gamma Radiation <lmR/hr to >100 mR/hr General radiation levels ranged from <1 mR/hr to >100 mR/hr, The containment has been maintained as a High Radiation Area (>100 mR/hr) with some areas exceeding Locked High Radiation Area limits (>1 R/hr). The radiation levels are associated with +.

• primary system components such as the steam generators, reactor coolant pumps, and 45, (iik primary system piping. Dose rates in excess of approximately 0.1 mR/hr prohibit the determination of total surface contamination.

Removable Contamination Range: Beta emitters up to >100,000 dpm/100 cm2, Alpha emitters up to >500-dpm/100 cm2. U The survey areas within the containment building have been maintained as 29k) contaminated areas (i.e. removable beta contamination >1000 dpm/100 cm2, and/or W removable alpha contamination >20 dpm/100 cm2). Contamination has resulted from,0003 system leakage during normal operation and component maintenance. Most areas have ' i experienced removable beta contamination levels of >100,000 dpm/100cm2 (Areas 3204, 3205, 3211) although all survey areas have exceeded contamination limit for OT.;IN M removable radioactivity. Removable alpha contamination of>500-dpm/100 cm2 has been measured in Areas 3205 and 3207, Area 3213 has no documented removable alpha contamination.

FAN Isotope Identification: Predominant Isotopes: Co-60, Cs-137 Isotopic analyses of swipe samples indicate the predominant isotopes impacting the dose from residual radioactivity are Co-60 and Cs- 137. The ratio of these isotopes varies from 1.4:1 Cs-137 to Co-60 to 3.5:1 Cs-137 to Co-60. P.-m ,.c. io O Indicates removable contamination levels-dpm/100cm2, XX Indicates dose rates-mR/hr.

Continued on next page.

Millennium Services Inc.

CY Containment Building Elevation 22'-0" (Page 2 of 2)

GAD 3200 I

Millennium Services Inc.

CrContainment Building Elevation1'-6" (Page I of 2)

GAD 3100 j

Radiation Range.: Gamma Radiation <0.ImR/hr to >100 mR/hr General radiation levels ranged from <lmRibr to <100 mR/hr except for the containment enclosure Cable A. 1 Vault that has maximum levels of<0. I mR/hr. The containment has been maintained as a High Radiation Area (>100 mR/hr) with some areas exceeding Looked High Radiation Area limits (>1 R/hr). The radiation 3 levels are associated with primary system components such as the steam generators, reactor coolant pumps, and primary system piping. Dose rates in excess of approximately 0.1 mR/hr prohibit the determination of ,

Removable Contamination Range: Beta emitters up to >100,000 dpm/l00 cm2. Alpha emitters up to ý

>S00.dpni/10O cm2lM The survey areas within the containment building have been maintained as contaminated areas (i.e.

removable beta contamination >1000 dpm/100 cm2, and/or removable alpha contamination >20 dprn/100 cm2). Contamination has resulted from system leakage during normal operation and component maintenance. Most areas have experienced removable beta contamination levels of >100,000 dpm/100om2 (Areas 3103, 3105, 3111, 3112) although all survey areas have exceeded contamination limit for removable radioactivity. Removable alpha contamination of >500-dpm/100 cm2 has been measured in four area ,. .

(Areas 3111, 3112, 3113, and 3114). No documented removable alpha contamination was found for Area 3107.

Isotope Identifieation: Predominant Isotopes: Co-6d, Cs-137, Am-241 L'1

• Core Sample Location.

(Ref. GTS Duratek Inc 1/27/99) -ls

8k)

Core Bore Sample: Isotopic analysis of a core bore Indicated Cs.i37 as the predominant gamma emitting isotope, with aCs*137 to Co-60 ratio of 11:1. For Area 3104, the 0-0.5" section of the core sample C contained Co-60 at 23.40pCI/g, Cs-134 at 2.66 pCi/gm, and Cs-137 at 279.00 pCi/g. Isotopic analyses of swipe samples indicate the predominant isotopes impacting the dose from residual radioactivity are Co-60 and Cs-137. The ratio of these Isotopes varies from 25:1 Co-60 to Cs-137, to 1:1. Am-241 has been Identified in the swipe survey samples.

O Indicates removable contamination levels-dpm/100oml.

Continued on next page.

Ul Indicates dose rates-mR/hr.

Millennium Services Inc.

0(9

CY Containment Building Elevation 1' -6" (Page 2 of 2)

GAD 3100 1.

Millennium Services Inc.

& Containment Building Profile All Elevations (Page 1 of 2)

GAD 3001 Radiation Range: Gamma Radiation <0.ImR/hrto >100 mR/hr General radiation levels ranged from <lmR/hr to >100 mR/hr, The containment has been maintained as a High Radiation Area (>100 mRlhr), The radiation levels are associated with primary system components such as the steam generators, reactor coolant pumps, and primary system piping and vessel. Dose rates in excess of approximately 0.1 mR/hr prohibit the determination of total surface contamination In Area 3403. Dose rates In excess of 10 mR/hr prohibit the determination of total surface contamination in Areas 3002 and 3004.

Removable Contamination Range: Beta emitters up to >100,000 dpm/100 cm2, Alpha emitters up to >500 dpm/100 cm2.

The survey areas within the containment building have been maintained as contaminated areas (i.e. removable beta contamination >1000 dpm/100 cm2, and/or removable alpha contamination >20 dpm/100 cm2). Area contamination has resulted from system leakage during normal operation and component maintenance. High radiation and contamination levels have limited access to Areas 3002 and 3004. Removable beta contamination 3300's -4a of >100,000 dpm/l00cm2 have been measured in Areas 3002 and 3004. Removable alpha contamination of

>500-dpm/100 c=2 have been measured in Areas 3002 and 3004. Areas 3002, 3004, and 3403 were not routinely surveyed due to limited accessibility.

-a-.-

hotope Identification: Predominant Isotopes: Co-60, Cs-137

• Core Sample Location.

(Ref, CY.98026 6/29/99) - - -

3100'. Lv-u Core Bore Samples: A qualitative Isotopic analysis of the core bore specimens indicated Co-60 as the predominant gamma-emitting isotope, with a Co-60 to Cs-137 ratio of approximately 6.9:1. Eu-152 was identified in one the core samples.

O Indicates removable contamination levels-dpm/100lm2.

fl Indicates dose ratso-milhr, Continued on next page.

Millennium Services Inc.

C (-_

CY Containment Building Profile All elevations (Page 2 of 2)

GAD 3001 "Se Radiation Contamination Levels Contamination Levels Survey Survey Area Class Levels Beta/Gamma Alpha AreaCls Code Description mR/hour DPM/100cm2 DPM/100cm2 Min Max Min Max Min Max Containment ND 3002 Enclosure Under 1 10 >100 5000 >100000 (<14.82) 400 Reactor Vessel Containment ND 3004 EnclQsure Sump Area 1 10 >100 1000 >100000 (<14.82) >500 Under Reactor Vessel Containment 3403 Enclosure Inside 2 <1 20 Surfaces Millennium Services Inc.

Radiation Contamination Levels Contamination Levels 11l Primary Auxiliary Building. Survey Survey Area Class Levels Beta/Gamma Alpha Elevation 35'-6" Code Description mR/hour DPM/100cm2 DPM/100cm2 Min Max Min Max Min Max GAD 2000 Auxiliary Building 2302 Component Cooling 1 <0,1 0,3 < 57.2 1000 <20 Radiation Range: Gamma Radiation <lmR/hr to >100 mR/hr. Area General area dose rates in the filter area (Area 2314) range from <1 Auxiliary Building mR/hr to 2 mR/hr with isolated areas up to 5 mR/hr with hot spots up to 2304 Boric Acid 1 0.2 24 < 57.2 40000 <20 >500 160 mR/hr as measured with an ion chamber (Eberline Re-2). Highest Evaporator Area dose rates (>IR/hr) are in Area 2308 due to the Volume Control Tank, Dose rates in excess of approximately 0.1 mr/hr prohibit the Auxiliary Building 2306 Boric Acid Mix Tank 1 1 35 < 57,2 >100000 <20 420 determination of total surface contamination. Area Removable Contamination Range: Beta emitters up to >100,000 Auxiliary Building dpm/100cm2 (Area 2308). Alpha emitters up to 581 dpm/100cm2 (Area 2308 Volume Control Tank 1 2 >100 < 57.2 >100000 <20 300 2304). Room The general area was maintained as a non-contaminated, (i.e. no Auxiliary Building 2310 Purge and Dilution 1 1 15 <1000 <20 removable contamination greater than 1000 dpm/100cm2). Fans Contaminated areas have existed at times in the Boric Acid Mix Tank area (Area 2306), the filter housings (Area 2314) and evaporator area Auxiliary Building (Area 2304). Typically, 25% of swipe survey samples have been 2312 Service Water 1 1 6 <1000 <20 Strainer Area analyzed for alpha emitting nuclides. No alpha contamination greater Auxiliary Building than 100 dpm/100cm2 was detected in the general area. Note that fixed 2314 HEPA Filter and Hall I I >100 <62 5000 <15.2 contamination measurements are limited by the background dose rates AreaI from equipment and systems that will be removed prior to final area Auxiliary Building characterization. 2316 Boric Acid Storage 1 0.2 0.5 <1000 <20 Room Isotope Identification: Predominate Isotopes: Co-60, Cs-137.

Isotopic analysis of samples from the PAB indicate the predominate isotopes impacting the dose from residual activity area Co-60 and Cs- 137. The ratio of these isotopes varies from approximately 1:1 to greater than 90% Co-60. The only other Isotope of significant measured activity is Fe-55, which has been measured at levels similar to Co-60.

However, the Fe-55 contribution to dose, and therefore the effect on the gross DCGL is minimal, O Indicates removable contamination levels-dpm/100cm2.

U Indicates dose rates-mR/hr. Elevation 35-6" Millennium Services Inc.

SPrimary Auxiliary Building.

O Indicates removable contamination level dpm/100cm2.

Elevation 21'-6" (Page 1 of 2)

GAD 2000 fX Indicates dome rates-mR/hr.

Radiation Range: Gamma Radiation 0.1mnRhr to >100 mR/hr General area dose rates in the hallway range from 0.5 mR/hr to 4 mR/hr. Maximum dose rates in the various cubicles range from 2 UQ Area 2206 Smear Analysis mR/hr In the Component Cooling Area to 600 mR/hr in the Boric Acid Mix Tank Area Dose rates In excess of approximately 0.1 mR/hr Nuclide ACi/Sample prohibit the determination of total surface contamination.

H-3 7.025 E-05 Removable Contamination Range: Beta emitters up to >100,000 Fe-55 7.846 E-04 dpm/10cm2. Alpha emitters up to >500-dpm/100 cm2 with a Ni-63 1.786 E-04 maximum of 4000.dpm/100 cra2.

Sr-90 1.811 E-05 The Hallway Area was maintained as a non-contaminated area, (i.e. no Pu-238 9.089 E-07 removable contamination greater than 1000 dpm/100 cm2). Pu-239, 240 3.569 E-07 Contaminated areas have existed at times in each of the cubicles on this elevation. Typically, 25% of swipe surveys samples have been analyzed Pu-241 3.090 E-05 for alpha emitting nuclides. No detectable alpha contamination has been Am-241 7.750 E-07 identified in the Hallway, Component Cooling Area, "A" Charging Pump Area, Purification Pump Aream Primary Water Transfer Pump Cm-243, 244 4.215 E-07 Area, Steam Generator Blowdown Room Area, and the LPSI Cubicle Co-60 2.972 E-04 Area, Note that fixed contamination measurements are limited by the Cs-134 1.093 E-04 background dose rates from equipment and systems that will be removed prior to final characterization, Cs-137 8.837 E-04 Gross Beta 1.027 E-03 Isotope Identification: Predominant Isotopes: Co-60, Cs-137, and Am 241.

Isotopic analyses of samples from the PAS indicate the predominant isotopes Impacting the dose from residual radioactivity are Co-60 and Cs-137. The ratio of these isotopes varies from 7:1 Cs-137 to Co-60 to greater than 90% CO-60. Am-241 has been detected in the soil samples from the area below the Drumming Room Area floor. Cs- 37 is the Continued on next page.

predominant Isotope (>93%) In the soil sample.

0 Soil Sample Location.

(Ref. GTS Duratek Inc. 1/27/99)

Subsurface Soil Samples: Samples of soils firom below the Drumming Room floor (Area 2228) identified contamination including Cs-137 at 126.6 pCi/gm, Co-60 at 8.73 pCi/gm and Am-241 at 0.29 pCi/gm.

0 Smear Location.

(Ref, Thermo NUtech, DAW-A6, N7-06-061 4/11/97)

Millennium Services Inc.

(1/

Survey Radiation Contamination Levels Contamination Levels CY Primary Auxiliary Building. Survey Survey Area Class Levels Beta/Gamma Alpha Area Description mR/hour DPM/100cm2 DPM/100cm2 Elevation 21'-6" (Page 2 of 2) Code Min Max Min Max Min Max GAD 2000 2202 Auxiliary Building 1 0,5 4 ND 1000 ND Hallway (< 57.2) (<20)

Auxiliary Building ND ND 2204 Component Cooling 1 0.1 2 (< 57,2) 1000 (<20)

Area Auxiliary Building ND 2206 Boric Acid 1 1 80 (< 57.2) >100000 22 >500 Evaporator Area Auxiliary Building ND 2208 Boric Acid Mix Tank 1 O0,5 >100 (<57.2) >100000 22 >500 Area Auxiliary Building ND ND 2210 "B" Charging Pump 1 1 >100 (< 57.2) >100000 (<20) >500 Area Auxiliary Building ND ND 2212 "A"Charging Pump 1 <1 >100 (<57,2) 22000 (<20)

Area 1______

2214 Auxiliary Building 1 5 >100 ND >100000 ND >500 Metering Pump Area (< 57.2) (<20)

Auxiliary Building ND ND 2216 Purification Pump I <1 10 (< 57,2) 50000 (<20)

Area Auxiliary Building ND ND 2218 Primary Water I 0,5 50 (< 57.2) 8000 (<20)

Transfer Pump Area .... .. _(<20) 2220 Auxiliary Building 1 1 40 143 >100000 ND 240 Sample Room (<8.89)

Auxiliary Building ND NDI 2222 Steam Generator 1 0,5 15 (<57.2) 24000 (<20)

BlowdownRoom _<__7,2_)__<20) 2224 Auxiliary Building 1 1 40 ND 24000 ND 123 HPSI Cubicle Area (< 57,2 ) (<20) 2226 Auxiliary Building 1 2 >100 ND 8000 ND LPSI Cubicle Area (< 57.2 ) (<20) 2228 Auxiliary DrummingBuilding 1 0,5 >100 ND >100000 ND >500 Room (< 57.2) (<20)

Millennium Services Inc.

611 Primary Auxiliary Building.

Elevation 19'-0", 15'-6", Pipe Chase and Pipe Trench (Page I of 2) Areas Not Shown GAD 2000 SPAS Pipe Chase Under Halfway U Radiation Range: Gamma Radiation lmR/hr to >100 mR/hr SPAS Pipe Chose Under Valve Room Many of the areas have been posted high radiation areas (>100 mR/hr).

PAS East &West Outside Pipe Trench 0 Maximum dose rates have exceeded locked high radiation area criteria

(>I R/hr). Minimal areas contained dose rates below 2 mR/hr. Dose o Area 2110 Smear Analysis rates in excess of approximately 0.1 mR/hr prohibit the determination of total surfate contamination. -Nddtide gCi/Samplc Removable Contamination Range: The general areas have recorded H-3 1.953 E-04 removable beta contamination levels of >100,000 dprull00cm2. C-14 3.268 E-3 Removable alpha contamination of >500-dpm/100 a2 was typical of Fe-55 5,867 E-01 most areas High dose rates In the area made decontamination efforts Impractical. Ni-59 3.017 E-4 Ni-63 3.984 E-02 Isotope Identification: Predominant Isotopes: Co-60, Cs-137, and Am. Sr-90 5.606 E-04 241.

Pu-238 9.355 E-04

• Core Sample Location. Pu-239, 240 3.199 E-04 (Raef OTS Duratek Inc. 1/27/99)

Pu-241 2.620 E-02 Core Bore Samples: Isotopic analyses of samples f*om the PAD Am-241 1.004 E-03 indicate the predominant isotopes Impacting the dose from residual Cm-242 8.654 E-06 radioactivity are Co-60 and Cs-137. The ratio of these Isotopes varies from 2:1 Cs.137 to Co-60, to 2,5:1 Co-60 to Cs-137. No Am.241 was Cm-243, 244 3.763 E-04 identified In the core bore samples. The sample for Area 2002 was Elevation 19'-0" Mn-54 1,099 E-03 taken from a wall that was spayed with contaminated liquid. In the first 0.5" of core sample the reported results were Co-60 at 6.93 pCi/gm. and Co-60 9,530 E-02 Cs-137 at 5.38 pCi/gm. For Area 2008, the first 0.5" of the core sample Cs-134 2,099 E-02 was 2.5-mR,.r on contact and not sent for gamma analysis. The 0.5"-." Cs-137 1.832 E-01 section of the core sample contained Co-60 at 13.IOpCi/g, Csl34 at 0,63 pCV/gmn and Cs-137 at 5.38 pCt/g. For Area 2104, the 0-0,5" Gross Alpha 3.414 E-03 section of the core of sample contained Co-60 at 34.lOpCI/g, Cs-134 at Gross Beta 3.087 E-01 5.18 pCi/gm, and Cs-137 at 74.00 pCI/g,

-' Smear Location Continued on next page.

(Ref. Thermo NUtech, DAW-AS, N7.06-061 4/16/97)

O Indicates removable contamination levels-dpm/100cm2 jX Indicates dose rates-mR/hr.

Elevation 15'-6" Millennium Services Inc.

CY Primary Auxiliary Building.

Elevation 19'-0", 15'-6", Pipe Chase and Pipe Trench (Page 2 of 2)

GAD 2000 I

Millennium Services Inc.

W Spent Fuel Building Elevation 47'-0" rN7 GAD 1000 Radiation Range: OarnmaRadlation <0,ImRihr to 20 mlRhr General radiation levels ranged from <lmR/hr to 20 mR-/hr.

Maximum radiation levels have been associated with areas immediately adjacent to the spent fuel pool or materials in the areas, The patio area (Area 1302) has radiation levels <0.2 mR/hr. Dose rates In excess of approximately 0.1 mR/hr prohibit the determination of total surface contamination.

Removable Contamination Range: Beta emitters up to

>100,000 dpm/100 cm2. Alpha emitters up to >500-dpma/100 cm2 The survey areas have typically been maintained as non contaminated areas (le. removable beta contamination <1000 dpm/100 cm2, removable alpha contamination <20 dpnt/100 cm2), Contamination events have occurred that resulted recorded removable beta contamination levels of >100,000 dpm/100lc2 (Areas 1306, 1308). Removable alpha FUEL BLDG. EL. 47'-0" contamination of>500.dpm/100 cm2 measured in one area (Area 1308). Rimedlation efort have reduced the levels to non-contaminated area levels. o Spent Fuel Floor Smear Analysis Survoy.Riaon ntiolve

-BvotJosrima ntllhoLe Alpha, N, L.CWSanwle ass, , Levels ClmyAra botope Identification: Predominant Isotopes: Co-60, Cs-137. coo",lo u ma/itn DPM/tOOm2 Dfl4/O~drd Ni-63 2.571 E-04 - ~ ~ ~ - oli~ min___mMax m~in MIX Isotopic analyses of swipe samples indicate the predominant Sr-90 7.603 E-06 N isotopes Impacting the dose from residual radioactivity are 132 Am~~ <0.2 ND (42.0) (48,92)

Pu-238 5.673 E-07 Are Co-60 and Cs-137. The ratio of these isotopes varies from 5:1 Cs-137 to Co-60, to 1:L. Pu-239, 240 2.322 E-07 Am-241 1.191 E-06 1304 FuelBuildingNew I < I is0N0 N1 o Smear Location. Cm-243, 244 5.099 E-07 Fuel Storage Area (<57,2) 27000 (<14,1)

(Ref. Thermo NUtech, DAW-AS, N7-06-061 4/09/97)

Co-60 1.183 E-04 48 NO >10M ND 0 Indicatas removable contamination levels Nb-95 1.190 E-04 1306 Fuel Building Cask Laydown Area

<1

(< 57.2) (<14.1) dpm/OlemZ. Cs-134 1.650 E-04 Cs-137 1,669 E-03 1308 FuelFuel Buolding POlL Spent Pit I <1 so (<Nd ND 57,2) >100000 (<14,I) >500 NJ Indicates dose ratos-mR/hr. Ag-lOrn 5.666 E-05 Gross Beta 1.821 E-03 Millennium Services Inc. Ci(47

CY Spent Fuel Building Elevation 35'-0" and Roof.

GAD 1000 Radiation Range: Gamma Radiation <lmR/hr to 10 mR/hr General radiation levels ranged from <lmR/hr to 10 mR/hr. Maximum radiation levels have been associated with areas adjacent to the spent fuel pool or materials In the areas. The roof area had radiation levels up to 0.2 mR/hr. Dose rates in excess of approximately 0.1 mR/hr prohibit the determination of total surface contamination, Removable Contamination Range: Beta emitters up to 10,000 FAN ROOM dpm/100 cm2. Alpha emitters <20-dpm/100 cm2.

The survey areas have typically been maintained as non-contaminated areas (i.e. removable beta contamination <1000 dpm/100 cmr2, removable alpha contamination <20 dpm/100 cm2). Contamination I events have occurred that resulted recorded removable beta contamination levels of 10,000 dpm/100cm2 (Area 1202).

Decontamination efforts have reduced the levels to non-contaminated area levels, Removable alpha contamination less than 20 dpm/100 cm2 have been measured in 3 areas (Area 1202, 1204, 1404).

Isotope Identification: Predominant Isotopes: Co-60, Cs-137.

Isotopic analyses of swipe samples indicate the predominant FUEL BLDG. EL. 35'-,0" isotopes impacting the dose from residual radioactivity are Co 60 and Cs-137. The ratio of these isotopes varies from 10:1 Cs 137 to Co-60, to 1:1.

Areas Not Shown O Indicates removable contamination levels-dpm/100cm2. ( 0 Fuel Building Roof

,U Indicates dose rates-mR/hr.

Millennium Services Inc.

CY Spent Fuel Building Elevation 21 '-6" GAD 1000 Radiation Range: Gamma Radiation <ImR/hr to >100 mR/hr Radiation Levels have varied greatly based on the spent fuel pool processing operations and the time period since the most recent refueling outage. General radiation levels ranged from <lmR/hr to 15 mR/hr. Maximum radiation have been with process equipment (Area 1106) or stored material (Area 1102). Dose rates in excess of approximately 0.1 mR/hr prohibit the determination of total surface contamination, Removable Contamination Range: Beta emitters up to >100,000 dpm/100 cm2, Alpha emitters up to 350-dpm/100 cm2.

The survey areas have typically been maintained as non-contaminated areas (i.e. removable beta contamination <1000 dpm/100 cm2, removable alpha contamination <20 dpm/100 cm2). Contamination events have occurred that resulted recorded removable beta contamination levels of >100,000 dpm/100cm2 (Areas 1102, 1104, 1106). Removable alpha contamination greater than 20-dpm/100 cm2 has been measured in 3 areas (Area 1102, 1104, 1106). FUEL BLDG. EL. 21'-6" Decontamination efforts have reduced the levels to non-contaminated area levels, Survey.Radiation Contamination Levels ontamination Levels Isotope Identification: Predominant Isotopes: Co-60, Cs-137, Survey Survey Area Class Levels Beta/Gamma Alpha Code Description mR/hour DPM/100cm2 DPM/100cm2 Cd Dsrpi Min Max Min Max Min Max Isotopic analyses of swipe samples indicate the predominant isotopes impacting the dose from residual radioactivity are Co-60 and Cs- 137.

The ratio of these isotopes varies from 10:1 Cs-137 to Co-60, to 1:1. 1102 Fuel Building <1 >100 ND >100000 ND 350 Laydown Area (<57.2) (<14.1)

O Indicates removable contamination levels-dpm/100cm2. Decon Area CaskBuilding 1104114Fuel Fuel I <1 15 (<N57,2) 78000 57 324 M Indicates dose rates-mR/hr. Fuel Building ND ND 1106 Skimmer Pump and 1 <1 >100 (<57.2) >100000 (<14. 198 Sump Area II__I_(<57_,_) >_(14.1 Millennium Services Inc.

Section A-2 Site Maps Millennium Services, Inc. 149

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Section A-3 10CFR50.75(g) Index Millennium Services, Inc. 150

10CFR50.75(g)-HSA Event Index Date:

ýMLý. a Alll.".y -CY Doc #:

Primary Survey

--. . -Y Area #: Event

Description:

5/3/69 AO 69-6 9110 Approximately two hundred gallons (200 gallons) spilled from the boron recovery evaporator distillate test tank to the surrounding area (asphalt covered) due to an improper valve line-up. 6.54E-5uci/cc beta/gamma and 2.31 uCi/cc H3.

5/6/69 AO 69-7 2108 Approximately five hundred gallons (500 gallons) of liquid was discharged 2206 from the Boron Recovery First Stage Evaporator to the floor of the Boron 2304 Recovery Evaporator area. About 5% of the solution was assumed to flash and result in a release.

5/28/69 CYA-342 9310 Drums containing high level activity were inadvertently placed near the 9308 security fence. Radiations levels in an unrestricted area in excess of ten times the limit set forth in Section 20.105(b) were identified.

7/2/69 LTR / Drawing 9310 Plan to relocate South perimeter Fence (compare CYA-342). Reference 9308 made to contaminated shower drains, a janitors deep sink and Hp area sinks 9306 draining to the "tile field" or leaching bed (upper peninsula 9520).

9520 7/2/69 LTR / Drawing 9520 Reference made to contaminated shower drains, a janitors deep sink and Hp 9308 area sinks draining to the "tile field" or leaching bed (upper peninsula 9520). See also CYA-342.

5/10/71 CYH-1686 3000 Iodine release to Containment following disconnect of the reactor vessel head instrument penetration conseal connections during refueling.

Subsequent documentation indicates that principle radionuclides were Xe 133, Xe-135, 1-131, 1-133, Rb-88 and H-3.

5/19/72 AO 72-2 N/A Unplanned airborne release from demineralizer due to operator error.

12/12/72 PIR 72-121 9312 Breaking up rock for fire main relocation. Portal monitor alarms. At least two men contaminated, one persons clothing and a spot on one persons face.

A jack-hammer and a shovel were also found to be contaminated.

12/13/72 LTR / Drawing 9310 Install 150ft. Of 15" concrete storm drain Pipe. Both ends open so present 9308 drainage will flow through. Possibly connect storm drain at later date. SEE CY-TS-97-0640 LTR and Drawing.

Page 1 of 20

10CFR50.75(g)-HSA IEvent Index Date: Primary CY Doc #: Survey Area #: Event

Description:

1/15/73 PIR 73-18 9110 RWST Thermo siphon heater leak.

5502 1/17/73 DEP Notif. 9106 Routine discharge report to the State. Maximum reported volume 5502 discharged was 2.86E4 gal/day.

4/26/73 PIR 73-134 3111 High RMS Alarm - Air Ejector Monitor R-15.

5502 5/18/73 PIR 73-154 N/A Abnormal inleakage to ADT from open SFP filter drain valve.

6/21/73 AO 73-6 9114 500 gal. leaked to the aerated drains tank. Gas release of approx. 0.3 curies.

Within MPC values. 0.238 curies released.

6/21/73 AO 73-7 2104 20 gal. spill from valve to pipe trench of PAB. Gas release of 0.011 curies.

Total release below MPC values.

11/1/73 AO 73-I1 9110 270 liters of liquid released to storm drain, diluted w/ 6000 gal. of service 2110 water. Gross activity 1.3E-3 cc/cc.

95220004 9106 4/26/74 AO 74-7 N/A Leaking seal on volume control tank hydrogen regulator causes gas release.

Xe-133 3.73E-11luci/cc max value.

6/9/74 PIR 74-108 9110 2 gal. spill from hole on top of "A" TT during transfer from "A" ADT.

10/15/74 PIR 74-180 2222 SG Blowdown Tank Rupture Disk actuates.

12/30/75 PIR 75-204 2222 SG Blowdown Tank Rupture Disk actuates.

1/28/76 PIR 76-15 9108 15 gal. of water leaks from "A" Test Tank to diked area.

2/27/76 PIR 76-30 9124 5 gal. leak from TSH valve.

3/30/76 LER-76-8/3-L N/A Waste Gas Decay Tank Rupture Disc failed.

Page 2 of 20

10CFR50.75(g)-HSA Event Index Date: Primary CY Doc #: Survey Area #: Event

Description:

5/13/76 PIR 76-66 2228 Waste discharge pipe erosion allows spill below drumming room floor.

5/22/76 LER 76-13/990 2228 See LER 77-1/3L.

6/29/76 PIR 76-79 N/A Rupture disk actuates after switching from "A" WGDT to "B" WGDT.

6/29/76 LER 76-15/3L N/A Rupture disk actuates after switching from "A"WGDT to "B" WGDT (see LER 76-8/3L).

10/19/76 Survey 9310 Peastone area 0.8-1.0 mR.

12/1/76 PIR 76-233 2202 Backup of drains contaminates floors.

2208 2214 2220 2226 2204 2210 2216 2222 2228 2206 2212 2218 2224 12/14/76 PIR 76-138 2228 Waste discharge pipe erosion allows spill below drumming room floor.

12/20/76 PIR 76-140 9110 Spill from weld to blacktop. An area 4' in diameter was affected.

12/29/76 PIR 76-142 9108 "A" BWST heater leaks to heater well and diked area.

9112 2/24/77 LER 77-2/3L 9108 1000 gal. of radioactive water released to diked area around tank.

6/9/77 PIR 77-45 9310 Particle discovered during routine survey next to 115 kV switchyard (114.17 uCi).

Page 3 of 20

10CFR50.75(g)-HSA Event Index Date: Primary CY Dec #: Survey Area M: Event

Description:

7/29/77 PIR 77-82 9307 Background increase detected above Weir Box (approximately 3 mR).

9/6/77 PIR 77-83 1106 5400gal. To RTT to RPWST, to SFB sump to ADT, to BWST 2400 gal. To 5502 River. RPWST contaminated. See PIR 87-67 & 93-222.

9106 9/18/77 LER 77-21/1P N/A "A" Waste Gas Decay Tank rupture disk actuates.

11/4/77 CHY 77-382 9106 223,200 gallons of processed waste liquids containing 7.54 xl0-1 curies of 5502 fission and activation products, 1.17 x 10-ldissolved noble gases and 2.66 x10+2 curies of tritium were discharged. See ETS/NR 50-213/77-8P.

11/4/77 LER 77-07 5502 Tritium activity was observed in river water near the discharge area. The 9106 discharge exceeded the control station (Middletown) by greater than a factor often.

1/30/78 PIR 78-23 9108 Unknown amount of liquid spills from tank to sump.

1/31/78 PIR 78-24 9110 Spill from Thermosyphon Heater.

3/17/78 PIR 78-33 2228 Waste discharge pipe erosion allows spill below drumming room floor.

5/4/78 LER 78-07/3L N/A Gas release through stack [5.03 curies of noble gas - see PIR 78-33].

11/2/78 PIR 78-119 N/A Steam Generator Rupture Disk actuates.

11/25/78 PIR 78-120 5502 Leak from the thermosyphon heater contaminates condensate system.

9106 11/29/78 PIR 78-122 1102 Guard reports shoes contaminated after rounds on Hot side (BWST).

9112 5108 9310 1/1/79 LER 79-06 N/A Unplanned radioactive gas release from the degasifier to the environment via the stack. Rupture disc actuates.

Page 4 of 20

10CFR50.75(g)-HSA Event Index Date: Primary CY Doc #: Survey Area #: Event

Description:

1/10/79 PIR 79-04 9110 Valve diaphragm ruptures causing steam and water leak from hole in handwheel.

2/14/79 LER 79-01 N/A Abnormal degradation of fuel cladding in Batch 8 fuel assemblies. 13 non compliance's in HP program.

2/19/79 LER 79-03/3L 9110 Total activity in the RWST greater than TS Limits.

2/23/79 PIR 79-27 9307 Rupture disk activates, 20 gal. stack to yard via manway.

9106 9522 3/6/79 PIR 79-38 9120 Rupture diaphragm activates. Water leaks from hatch.

9307 9106 9522 5/9/79 PIR 79-63 9112 Sampling indicated that the "B" BWST siphon heater was leaking.

6/4/79 PIR 79-57 1308 Fuel pool water overflowed into ventilation duct during cavity drain 1204 operation.

6/11/79 Survey 9514 Contamination found outside the RCA.

6/20/79 79-620 9310 Four barrels of contaminated soil remediated adjacent to the RCA. Extensive 9308 site survey performed.

6/30/79 Survey 9310 Four 55 gal drums of soil removed by Hydrogen bank outside the RCA.

9308 Analysis indicated possible failed fuel.

7/23/79 PIR 79-83 9120 Liquid dripping from ventilation system flange to main stack.

9307 8/10/79 PIR 79-92 9307 Disjointed section of piping causes spill during excavation, contaminated soil identified.

8/22/79 NEE-80-RA-0298 9120 See page 3-6, 3-7 and Table 3-1of documents. See attached surveys both pre and post event.

Page 5 of 20

10CFR50.75(g)-HSA Event Index Date: Primary CY Doc #: Survey Area #: Event

Description:

8/22/79 PIR 79-96 1404 Sandblasting the stack causes airborne activity.

5402 9307 2402 8/22/79 Survey 3206 Contamination identified at Containment Bldg ramp with reference to water 9310 run off.

9/21/79 NEE-RA-1 16 N/A This document has calculation for Max. Ind. Dose, and curies released for 11 events from 1972 through 1978. LER-77-08/4T was not retrievable from NDS.

9/29/79 PIR 79-105 9307 50 gal. spill to RCA yard, 500 gal. to PAB floor.

2004 2002 2310 2216 2402 2006 11/27/79 PIR 79-126 N/A Contaminated staging sent to MP from CY. Lack of material control.

11/28/79 PIR 79-122 5502 Contaminated water enters feed and condensate system.

9106 12/16/79 PIR 79-125 9307 Degasifier fills w/ reactor coolant. Spill at stack and yard drain hold tank.

2402 9120 1404 2402 5402 6502 9423 12/16/79 LTR 3/16/80 2402 Contamination on PAB roof is fixed by asphalt base sealer [see PIR 79-125].

Page 6 of 20

10CFR50.75(g)-HSA IEvent Index Date: Primary CY Doc #: Survey Area #: Event

Description:

1/20/80 LER 80-15 6004 Identified 6" of water on waste disposal bldg. Floor.

6006 6002 6008 6012 2/3/80 LER 80-05 9112 Leak in "B" BWST Thermo Siphon heater.

2/14/80 PIR 80-26 2228 Activity found after sampling the yard storm drain.

2/27/80 PIR 80-34 2228 Contaminated sand was found in the river effluent pit.

2/27/80 PIR 80-33 9112 Leaking flange form piping fills BWST diked area with 3 inches of water.

3/10/80 PIR 80-37 9527 Contamination found in uncontrolled areas. As stated in the PIR, small areas 9520 of low-level contamination radioactive materials were found on facility 9531 grounds through routine testing in a normally non radioactive area.

9506 9512 9522 9308 9514 5402 2402 9422 6502 4603 9423 3/18/80 HP 80-213 9520 Concrete slab reading 3mr/hr found on peninsula [see PIR80-37].

4/19/80 PIR 80-54 2402 12" X 2" split in main stack duct seam leaking to atmosphere.

4/29/80 PIR 80-58 9307 Activity leached out from mud in bottom of yard drain.

5/3/80 EN-149 9307 Venting VCT to Waste Gas Surge Tank received RMS alarm. Water/steam release from blowdown tank through cont. duct work & stack.

Page 7 of 20

10CFR5O.75(g)-HSA IEvent Index Date: Primary CY Doc#: Survey Area #: Event

Description:

5/4/80 PIR 80-62 9307 Steam Generator blowdown tank rupture disk actuates. Steam exits stack.

9310 9312 5402 2402 1404 4603 6502 5/19/80 PIR 80-72 N/A Lack of material control. Turbine inner casing shipped w/o HP release.

12/8/80 PIR 80-143 9112 Spill from "B" Boron Waste Storage Tank Siphon heater to diked area.

2/9/81 PIR 81-10 9208 Contamination found at three locations.

3/9/81 Various 9312 Contaminated concrete, asphalt and soil remove for construction of SRSA.

Permission to dump on peninsula (clean material?) Contaminated material to barrels.

4/22/81 PIR 81-38 9520 Lack of material control. Contaminated reheater tubes shipped off site.

7/2/81 MSM-81-193 9307 Stack deconned after 5/20/81. Old ductwork replaced w/ISS.

7/25/81 PIR 81-82 5502 Primary to secondary leak in steam generator # 2.

9106 9/17/81 PIR 81-98 2402 A 3' section of ductwork seam on the PAB exhaust fan failed.

9/17/81 LER 81-15 2402 Leak from exhaust duct to main stack.

9/22/81 PIR 81-101 9110 15/20 gal leaks from the RWST hatch.

9522 9307 10/3/81 PIR 81-106 9110 Activation of heater causes RWST to overflow to diked area.

Page 8 of 20

10CFR50.75(g)-HSA IEvent Index Date: Primary CY Doc#: Survey Area #: Event

Description:

10/4/81 HP Survey 9310 RCA sample at rails after spill from SFB lower level.

1104 10/19/81 PIR 81-114 2314 Inoperative Waste Liquid Evaporator level indicator causes contamination.

10/11/82 Contract, drawings, 9514 Parking lot modifications led to the distribution of radioactive materials to Spec. work logs 9418 offsite locations.

9416 9414 12/31/82 PIR 82-108 9112 Contaminated liquid found by BWST manifold.

3/28/83 PIR 83-37 9520 84 gal. Contaminated H20 from Chem. Lab to Septic Tank.

4/14/83 PIR 83-47 5502 Primary to secondary steam generator tube leak.

9106 4/18/83 PIR 83-42 9522 Yard drain to manway # 5.

9307 7/6/83 Survey 9520 Contaminated strainers located in bone yard.

7/28/83 PIR 83-75 9522 RCA manway overflows to RCA yard and enters # 5 yard drain.

9307 7/31/83 PIR 83-78 2306 Rust & scale from BAMT overflow pipe contaminates personnel shoes.

2202 2314 9/20/83 NE-83-RA-1474 9310 Evaluation and results of buildings and yards in the RCA which could run 9312 off and contaminate the clean area. See soil and sediment samples. Analysis 9308 indicates activity at all sample locations.

12/13/83 PIR 83-137 9106 400 gal. release via mis-positioned valves, 4/3/84 PIR 84-39 9112 20 gal. liquid spill between "B" BWST and RWST.

9110 Page 9 of 20

10CFR50.75(g)-HSA Event Index Date: Primary CY Doc #: Survey Area #: Event

Description:

4/11/84 PIR 84-43 3107 Water leaking up through the cable vault floor. Tritium detected in the water. Water pumped in the yard sewer system.

5/25/84 PIR 84-72 9307 Chem. Lab drain overflows, ADT drain line plugged causing flow to yard.

8/3/84 Survey 9307 Asphalt applied on contaminated area.

8/21/84 PIR 84-136 3002 The reactor cavity seal ring failed, draining 200,000 gallons of water from 3004 the reactor cavity to the lower levels of the containment building.

3101 3103 3105 3102 3104 3106 3111 3112 3113 3114 3322 3324 9/11/84 PIR 84-181 9116 Resin liner overflowed.

9312 9/13/84 PIR 84-182 9116 Resin liner overflowed.

9312 11/6/84 PIR 84-244 5126 Reduction in steam pressure allows water to enter condensate receiver.

5128 9106 5502 11/13/84 PIR 84-242 9106 Condensate receiver contamination verified by Chemistry.

5502 5126 5128 Page 10 of 20

10CFR50.75(g)-HSA Event Index Date: Primary CY Doc #: Survey Area #: Event

Description:

11/15/84 PIR 84-246 3101 Leak on FT-40I Loop 1 flow transmitter.

3202 11/26/84 PIR 84-264 9307 Water from RCA Yard drain cover with possible path to storm drain.

3/20/85 PIR 85-51 9307 Drains 4&5 show activity via Adams filter dike via cond. relief valve via #2 SG.

3/23/85 Survey 9520 4 Bolts at 2 feet long with lOOK DPM found on boneyard. Soil under pallets 15K DPM fixed. Plates cut from MSR found in metal waste box found to be 2-5K dpm fixed. 2 sections steam pipe found a 1-6K DPM fixed.

3/25/85 PIR 85-52 9307 ADT drain culvert overflows to RCA yard and yard drain #5.

9522 5/17/85 PIR 85-74 9307 Yard drains # 4&5 show activity from leaking Steam Generator BD valve.

6/3/85 PIR 85-84 9226 3 gal. spill of sodium hydroxide during radwaste presolidification operation.

9/30/85 HP 85-573 9227 A 60R drum within a plastic bad with "dry" speed dry was compacted. The 9310 plastic bag breeched and the personnel were externally and internally 9116 contaminated, The compactor shed was also contaminated.

1/22/86 PIR 86-23 9312 Broken drain connection on temp. drain line drips to ground.

11/13/86 RA-1142 9530 Dredge Canal.

9531 8/2/87 87-CY-7151 3206 Drain hose spill and water spill at equipment hatch moat.

9307 9230 4/7/88 PIR 88-81 9106 Primary to secondary leak. S/G #2 tube leaks compromises secondary side.

5502 10/11/88 PIR 88-181 9522 1200 Ft/3 of contaminated soil was discovered around MH No. 1.

9307 Page 11 of 20

10CFR50.75(g)-HSA Event Index Date: Primary CY Doc #: Survey Area #: Event

Description:

12/16/88 PIR 88-218 N/A Leak from corroded cast iron pipe to sump.

2/24/89 PIR 89-35 9102 Contamination outside of RCA. During a normal routine weekly survey, a 9522 slight increase in normal radiation level was noted. Further investigation 1102 showed high levels of contamination in the 115 kV transformer moat.

9520 Subsequent surveys performed in the lowland area east of the Discharge Canal. Additional surveys were performed on the Upper Peninsula where soil was deposited following removal from the east side of the Discharge Canal.

2/28/89 Survey 9520 Activity identified in soil mounds located along the peninsula canal road.

9530 Soil was removed from the South Ballfield East of the discharge canal and 1102 deposited along the canal road.

3/1/89 CH 89-844 0025 Memo describing a reivew and status of floor drain systems in the Spent Fuel building and the PAB.

10/7/89 PIR 89-170 1308 Spill of approximately 120 gallons of contaminated water on SFB UL.

10/12/89 PIR 89-174 2006 Unknown volume of water spilled from flange in RHR pit.

2002 2004 11/17/89 LER 89-020 N/A Significant fuel damage.

3/16/90 PIR 90-48 3103 After returning loops 2, 3, and 4 to the drain header water spilled from FVB.

3/22/90 PIR 90-52 9307 330 gal. spill of component cooling water from cracked piping.

4/11/90 PIR 90-65 9110 Contaminated hoses dropped. Service Bldg. to containment blocked.

9307 8/16/90 PIR 90-203 5502 Primary to Secondary steam generator leak.

5126 5128 9106 Page 12 of 20

10CFR50.75(g)-HSA Event Index Date: Primary CY Doc #: Survey I Area #: Event

Description:

9/3/90 PIR 90-213 5502 Primary to secondary leak.

5126 5128 9106 9/14/90 PIR 90-239 9110 RWST shows signs of a 6 gal. per day leak.

8/12/91 PIR 91-149 2104 400 gal. spill from RCS via open valve to pipe trench.

10/22/91 NIR #059 N/A Gaseous release, if allowed to continue would have exceeded yearly tech spec limit for Iodine.

11/17/91 PIR 91-278 9110 RWST flange leaked when RWST was being filled during cavity pump down.

1/21/92 PIR 92-27 9110 Leak RWST to diked area.

3/18/93 CH-93-523 9520 Memo concerning leach field.

11/13/93 PIR 93-222 9122 The PWST and RPWST showed high levels of chlorides, sodium, boron and 9124 activity [see PIR 77-83 & 87-67].

4/5/94 LER 94-007 N/A Potential for radiological release Post LOCA sump recirculation.

4/15/94 PIR 94-076 9522 Discharge from PAB supply heat exchanger enters Adams drain to yard drain.

4/30/94 PIR 94-093 1308 Measurable Cesium present from the liquid in the standpipe next to the SFP.

The source term had not been identified as of 10/94.

7/21/94 PIR 94-125 9110 RWST leak produces standing water.

11/23/94 ACR 94-179 9204 Gages with fixed contamination were inadvertently released from the plant site.

2/12/95 PIR 95-067 9522 During sampling activity was found in the yard drains.

Page 13 of 20

10CFR50.75(g)-HSA Event Index Dnte: Primary CY Doc M I III Nagy %0 g WFl W.

Survey Area #: Event

Description:

8/1/95 ACR 95-250 9313 Fixed contamination found outside RCA in the 115KV switchyard.

9306 9307 9102 9308 11/15/95 ACR 95-472 9310 Lack of material control. Contaminated hose used for hydrolazing.

2/13/96 ACR 96-0158 9414 Lack of material control. Contaminated filters found in warehouse from 1979.

5/20/96 ACR 96-559 N/A Bomb detector equipment containing source found in trash dumpster.

10/7/96 ACR 96-1185 9522 Tritium found in yard drains. Probable cause is leak in RWST to Yard drain

1. 1.

11/30/96 ACR 95-509 9306 During a routine survey a "particle" was located in the asphalt. Thirteen 9307 additional particles located, several particles located outside the RCA.

9308 9313 2/27/97 ACR 97-104 N/A Contaminated material inadvertently released to an unlicensed vendor.

2/28/97 ACR 97-106 9410 Contaminated equipment found outside the RCA.

6/19/97 TS-RCA-01A,-02A, Unknown Soil and Asphalt Analysis Report - pre Decommissioning.

03A & Soil at Tank Berm 7/17/97 ACR 97-450 9535 Contaminated material found outside the protected area. As part of the Site 9536 Characterization Survey, contaminated material and soil were identified in the rifle range area. During the implementation of a scoping survey, elevated activity was detected in the landfill adjacent to the rifle range. A subsequent investigation identified two locations of fixed contamination, insulation material and a concrete block.

8/21/97 ACR 97-670 9110 Activity located in sand by RWST. Uncontrolled release path.

Page 14 of 20

10CFR50.75(g)-HSA Event Index Date:

wu%ý. .

Primary CY Doc #: Survey Area #: Event

Description:

8/26/97 CR 97-0686 4210 Two (2) contaminated items located during CY Confirmatory Survey.

8/29/97 ACR 97-694 N/A Activity detected in "clean" Closed Loop Cooling Water System.

9/3/97 ACR 97-0713 N/A Potentially radioactive water was shipped to a Hazardous Waste vendor.

9/4/97 ACR 97-0716 9522 Tritium located outside fence at discharge point. Unmonitored release path.

9521 9/9/97 CR 97-0729 5502 Contamination found on "A" & "B" Aux Boilers, both beta/gamma and 9106 alpha contamination.

5126 5128 9/12/97 CR 97-0743 9537 Rifle Range HP controls need to be enhanced.

9/16/97 CR 97-0756 4110 Radioactivity identified in North and South Turbine Building Sump.

4112 5502 9106 9/24/97 ACR 97-0785 9535 Follow-up to ACR 97-0450. An assessment of soil indicates that the 9536 amount of radioactivity cointed in the soil may exceed the limits of 10 CFR 20.2203,a,3,ii.

11/17/97 ACR 97-0994 9526 Soil sample analysis identified plant related radioactivity on hillside East of 9527 plant.

11/24/97 ACR 97-1011 9310 Concrete blocks were returned to site for analysis and found to be 9308 contaminated. A press release is to be issued to notify the public that 9307 contaminated materials were found at an offsite location. Estimated dose is 9227 I mrem/year.

11/26/97 ACR 97-1022 9307 Contaminated blocks were found at additional offsite locations. (see ACR 9308 97-1011).

9310 9227 Page 15 of 20

10CFR50.75(g)-HSA Event Index Date: Primary CY Doc #: Survey Area #: Event

Description:

12/1/97 ACR 97-1032 5110 While performing a routine direct frisk survey of the HP Offices a small spot on a carpeted floor was found to be 10,000 ccpm.

12/2/97 ACR 97-1033 9307 A press release identifies a second offsite location which contains low levels 9308 of plant related material in the soil. The release also provides an update on 9310 the number of concrete blocks identified and surveyed.

9227 12/10/97 CR 97-1046 9110 Liquid found in RWST Siphon Heater Well contains radioactivity.

12/15/97 ACR 97-1055 4106 CYAPCo contracted MSI and SRA to perform radiological surveys in selected areas outside the RCA using new technology developed by SRA.

During the survey on the grade level elevation of the Turbine Build a small area of contamination was identified. Three radioactive spots identified.

Turbine Bldg. door, Air Comp., GS- 1.

1/22/98 CR 98-0049 9106 Dredged spoils from discharge canal contained radioactive material in 1987.

2/4/98 CR 98-0070 9310 Drums reported to be buried west of the Gas Sphere pad. No drums were found during search.

3/23/98 CR 98-0219 3107 Sumps overflow placing 1000 gallons on floor before a permit can be obtained.

3/26/98 ACR 98-0240 9102 Contamination found in sludge at the bottom of electrical manhole (MHS-3) 9306 SW of the 115 kV switchyard. Gamma spectroscopy showed the presence of Cs-137, Cs-134, and Co-60. Additionally paint chips from the area showed contamination.

4/8/98 CR 98-0268 5128 Sample Analysis on Aux Boiler "B" identified radioactivity.

4/20/98 ACR 98-0296 9310 Past work in the area may have contaminated the area during the loading of material being stored inside the culvert.

6/1/98 ACR 98-0419 9110 The RWST is apparently leaking through its floor plates as well as from its manway port flanged joint. Water has been collecting around the foundation and trough area at I to 8 gallons per hour.

Page 16 of 20

10CFR50.75(g)-HSA Event Index Date: Primary CY Doc #: Survey Area #: Event

Description:

6/10/98 ACR 98-0455 9520 Samples of sludge show Cs 137 @ 3 E-8 uCi/mI and Co60 @ I E-7 uCi/ml.

6/18/98 Survey 9520 Survey described that "...some valves appeared to have detectable amounts of radiation on them (up to 150 ccpm)."

7/28/98 HP 98-423 3000 Characterize PCB/radioactivity contamination of paints inside containment.

9/4/98 CR 98-0767 9307 Pipe in Pipe Trench leaking.

2110 2104 9/9/98 ACR 98-0778 5114 Chemistry cabinet at offsite location was identified as being radiologically contaminated. Released for the RCA in 1985.

9/30/98 ACR 98-0851 9108 Cracks in diked area has allowed water to leak through the concrete. 2500 to 9312 3000 gals of water leaked through the concrete in 48/60 hrs.

10/14/98 ACR 98-0887 9110 HP identified loose contamination above MDA inside a catch containment at the base of the RWST. Survey on the side of the RWST pedestal indicated loose contamination up to 10,000 dpm/100cm2. The concrete is powdery in this area.

10/23/98 ACR 98-0906 0043 During the removal of the nozzle dams from the cavity approximately 1/2 cup of resin was removed from the spider assembly on 3 Hot Leg [see ACR 98-0698].

10/26/98 Ltr. CY-98-180 9530 Radiologically contaminated dredge spoils from the discharge canal may have been deposited on the peninsula. Boneyard. This area is outside the radiologically controlled area.

10/28/98 CY-98-062 9530 Radioactive dredging spoils deposited on the peninsula.

11/23/98 ACR 98-0973 1106 When draining SFP skimmer pumps and filters the flow exceeded the drain capability resulting In a spill that contaminated the A pedestal and floor.

11/23/98 ACR 98-0972 N/A An old first stage turbine blade was found to have fixed contamination. This blade was one of approx. 15 to 20 blades recovered from a dumpster in 1996, and used as going away gifts.

Page 17 of 20

10CFR50.75(g)-HSA Event Index Date: Primary CY Doc #: Survey Area #: Event

Description:

11/24/98 HP 98-586 9306 Three samples positive for Co-60 and Cs-137.

9308 11/30/98 HP 98-590 9310 Memo concerning sampling wells spoils analyses.

9307 9306 9520 12/2/98 ACR 98-988 9108 After repairs to the HUT dike area rain water seeped through cracks in the 9312 diked area. News paper article reports that water was radioactive.

12/7/98 CR 98-0992 9302 During a non RCA clean-up, surveyed items were being placed in a 9304 dumpster for disposal using a front. While loading material, sand was 9306 inadvertently scooped up and placed in a dumpster. Follow-up analysis 9308 indicated the sand was contaminated.

12/7/98 Shooting Range 9535 See ACR 97-450. Contaminated soil C0-60and Cs-137. Fixed Landfill Report contamination on Concrete block and insulation material.

1/8/99 CR 99-0022 9108 Water leaked from the ADHUT dike area.

9312 1/26/99 E-mail GTS Duratek 9514 Additional information provided for characterization data tables.

9307 2002, 1/28/99 AWO099 00323 9518 Dig holes to install fence posts [see HP 99-110].

9520 2/15/99 HP 99-056 9306 Soil samples obtained in the trench area.

9308 2/15/99 HP 99-112 9302 Soil samples taken in preparation for excavation of trench. Area 9313 9313 positive for Co-60 and Cs-137.

2/15/99 HP 99-058 9308 Site Cleanup. Sample 79 of 134 Bonanza bags. 32 of 79 show detectable levels of contamination. Soil originated from survey area 9310.

2/15/99 HP 99-113 9514 Soil samples taken at PAP sanitary sump. No activity identified.

Page 18 of 20

10CFR50.75(g)-HSA Event Index Date:

LOCKI.W.

Primarv ýCY V I IN a NUB y I Doc #:

-Wý W.

Survey W- . -Y Area #: Event

Description:

-www..r.-w 2/15/99 HP 99-111 9302 Soil samples obtained and analyzed from proposed trench area.

9304 9512 9514 2/15/99 HP 99-057 Unknown Analyses of well drilling spoils.

3/11/99 HP 99-114 9510 Several monitoring wells on site show tritium above MDA.

9520 9530 9307 9312 9310 9306 9118 9302 Soil samples taken from south of the 115kV yard. No detectable activity.

3/11/99 HP 99-109 9308 However, hole 11 had indications of petroleum contamination.

3/11/99 HP 99-110 9520 Soil samples analysis for fence installation. No positive indications.

3/29/99 HP 99-126 9418 Soil sample collected for lavatory excavation.

3/31/99 CR 99-0208 9310 Bus 10 drain pipe broken during excavation.

4/6/99 HP 99-135 9302 Soil samples obtained from rear of warehouse #2 east to the rear of the 9313 Training/Stores Office Building in support of site repowering.

4/16/99 Verbal Doc 5124 A former CY employee (present Contractor) informed Site Char. that the current Maint. Lunch rm. was the former decon. rm. And that when it was converted the sink lines were fill with lead and or concrete to reduce exposure.

5/18/99 Gamma Spec. 9307 Sample from MH # 1.

Page 19 of 20

10CFR50.75(g)-HSA Event Index Date: Primary CY Doe #: Survey Area #: Event

Description:

9102 Analyses of Soil samples from concrete pad area and adjacent trenches in 5/19/99 HP 99-201 9227 support of Bus 13 modifications.

9310 9102 Soil Samples for trench/Contaminated.

5/27/99 HP 99-209 9310 9308 Soil samples obtained from proposed heavy haul Rd. See HP 99-266 B-306 7/27/99 HP 99-255 does not contain CY related radioactive material.

9308 This letter rescinds the statement that bore hole B-306 contains plant related 8/5/99 HP 99-266 radioactivity.

9310 Liquid found leaking out of C-van containing radioactive waste.

8/23/99 CR 99-0491 Unknown Liquid found leaking out of two separate shipments of radioactive material 9/2/99 CR 99-0535 soil.

N/A R14A Main Stack Monitor exceedance.

11/6/99 CR 99-0718 2220 Spill of potentially contaminated water onto S/G Blowdown room occurred 1/28/00 CR 00-0086 when operator removed pressurized hose.

9312 Water collected in the upper internals package. Covering was blown off by 4/26/00 CR 00-0294 the wind, water was collected in the tarp region.

6412 A mechanical isolation cap was dislodged from the pipe due to boundary 6/14/00 CR 00-0403 isolation valve leak. The cap failure resulted in approximately one quart liquid spill on floor and wall.

Page 20 of 20