Text

Rev 1,Volume 5,Books 2 & 3 of 3 to Final Survey of Group D
	ML20134G632
Person / Time
Site:	Fort Saint Vrain
Issue date:	10/26/1996
From:	; SCIENTIFIC ECOLOGY GROUP, INC.
To:	;
Shared Package
ML20134G601	List: ML20134G599; ML20134G617; ML20134G632; ML20134G640; ML20134G686; ML20134G727;
References
	NUDOCS 9611130310
	Download: ML20134G632 (466)
	v • d • e

{{#Wiki_filter:_ __- - _ - _ - . - - .. - I l Fort St. Vrain Nuclear Station Decommissioning Proj. ect

l 1 ! Final Survey Report i i j VOLUME 5 l l FINAL SURVEY OF GROUP D (BOOK 2 of 3) ! REVISION 1 1 l i i l l l Prepared by: l Scientific Ecology Group, Inc. i Field Services Division l l l I 9611130310 961030 PDR ADOCK 05000267 . ,' W PDR !

I Scientific Ec: logy Grcup, Inc. [g g Radiological Engineering & Deconunissioning Services ~ < - ~ ~ ~ Fort St. Vrain Nuclear Generating Station Decommissioning Project LJ Release Reconi Contents Survey Area Survey Area ID: Survey Area Description Pages D2200 Secondary Cooling System 2-3 Survey Unit (s) Locadon Code Survey Unit Description Pages D2200 ZZZZZ EZT01 Secondary Cooling System 4-23 Prepared By: e / / o - 2 r '7 d SEG RadiglofMal Engineer Date Reviewed By: / b odAW / io /u. j ~~D R> D~~

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Scientific Eccl:gy Grcup, Inc. ((~ggg Radiological Engineering & Decornmissioning Services a 2 - TSA 4" Line L2266 (Feedwater, Reactor Building, Snubber 16 1 - RSA Loop 2) Deck 2 i
~~,7 2 - TSA 4" Line L2268 (Feedwater. Reactor Building, Snubber ;~~
1.RSA Loop 2) Deck 2 2 - TSA 4" Line L2270 (Feedwater, Reactor Building, Snubber 18 1 - RSA Loop 2) Deck 2 2 - TSA 5.5" Line L2214 (Main Steam, Reactor Building, Snubber ! g9 1 - RSA Loop !) Deck 2 l 2 - TSA 5.5" Line L2216 (Main Steam, Reactor Building, Snubber 20 ' 1 - RSA Loop 1) Deck 2 g 2 - TSA 5.5" Line L2218 (Main Steam, Reactor Building, Snubber i 1 - RSA Loop 1) Deck 2 g 2 - TSA 5.5" Line L2271 (Main Steam, Reactor Building, Snubber 1 - RSA Loop 2) Deck 2 j
'3 2-TSA 5.5" Line L2273 (Main Steam, Reactor Building, Snubber i I - RSA Loop 2) Deck 2 2 - TSA 5.5" Line L2275 (Main Steam, Reactor Building, Snubber O(/ 24 1 - RSA Loop 2) Deck 2 2 - TSA 14" Line L22549 (Cold Reheat Reactor Building, Snubber 25 1 - RSA to Helium Circulators) Deck 1 l
2 - TSA 14" Line L2296 (Cold Reheat Reactor Building, Snubber 26 1-RSA to Helium Circulators) Deck 1 6 - TSA T2201 (Steam Water Dump Reactor Building, Level 1
'7 6 - RSA Tank) Survey Area F015 l 1-H3 3 - TSA 4" Line L22281 (Liquid Waste Reactor Building, Level 1, 28 1 RSA Discharge Line to Receivers), Survey area F015 i 1 - H-3 Interface with liquid radwaste ;
system (System 62) l 3 - TSA 4" Line L22282 (Liquid Waste Reactor Building, Level 1, 29 - 1 - RSA Discharge Line to Sump) Survey Area F015, by south 1-H3 wall i i 2 - TSA 2" Line L22271 (Gas Waste Reactor Building, Level 2, ; 1 - RS A Discharge Line), Interface west side by south wall " 30 ; 1 - H-3/Fe-55 with gaseous radwaste system !' (System 63) O i Page 8 ! i
Scientific Ec:1:gy Grcup, Inc. Radiological Engineering & Decommissioning Services [s'- jggg
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Fort St. Vrain Nuclear Generating Station Decommissioning Project O Special Samples Location Code: D2200 ZZZZZ DZT01 Comments: H-3 & Fe-55 activity reported in Net dpm/100 cm2 Underlined values exceed the critical level Bold values exceed 250 dpm/100 cm: Italic values exceed 1,000 dpm/100 cm2 Tritium and Imn-55 Removable Activity Samples Locadon # Type of Sample Critical Level MDA Activity 27-1 H-3 117.8 241.4 42.5 28-1 H-3 117.8 241.4 -30.1 29-1 H-3 114.7 235.3 M5LO 30-1 H-3 & Fe-55 13.2 29.7 9.0 0 O. Page 9 l l
Compilation of Statistical Summaries
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Total Surface Activity - Beta Survey E @l3 i Removable Surface Activity - Beta Survey Location Code: D2200TZZZZEZ Medium Codes: B0019, B0023 Comments: Total Surface Activity (TSA) reported in Net dpm/100 cm2 Removable Surface Activity (RSA) reported in Net dpm/100 cm2 TSA RSA Upper Confidence Limit (UCL) 25.5 3.4 O Mean -31.8 2.3 Maximum 629.4 9.7 . Minimum -730.9 -5.8 l Standard Deviation 278.8 4.1 Minimum Detectable Activity 1,526.0 25.5 1 Critical Level 738.1 9.6 Samples Reported 66 35 l Samples Prescribed 66 35 I O i Page 1: ERGS:V2.7.0.a.5.28.% I Page 10
Statistical Summary Total Surface Activity - Beta Survey gg Location Code: D2200TZZZZEZ Survey Reason: T01 - Initial Final Release Medium Codes: B0019, B0023 Net dpm/100 cm2 l Upper Confidence Limit (UCL) 25.5 l Mean -31.8 l Maximum 629.4 l Minimum -730.9 l Standard Deviation 278.8 l Minimum Detectable Activity l Critical Level 1,526.0 738.1 g l l Samples Reported 66l l Samples Prescribed 66l l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 3,000.0 dpm/100 cm2 YES l Passed l Percent of Samples > 3,000.0 dpm/100 cm2 0.0 l Passed (3) l Number of Samples > 4,000.0 dpm/100 cm2 0 l Passed (4) 1 l UCL of Mean less than or equal 4,000.0 dpm/100 cm2 YES l Passed i I (3) 10% Test (4) Single Measurement Test l 1 l l Page 1:TSABS:V2.7.0.a.5.28.96 l Page 11 l
Plant Systems Corrected Field Activity Values l O' -l 5 M f3 Total Surface Activity - Beta Survey
~~,.=in Location Code: D2200TZZZZEZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level.~~
Bold values exceed 3,000.0 dpm/100 cm2 Italic values exceed 4,000.0 dpm/100 cm2 , , Count time reported in seconds. Medium Download N . Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code
B0019 219-3 27 1 15 348.7 153.8 -75.8 T01 27 2 323.4 141.1 91.0 27-3 340.5 149.7 75.8 27-4 264.2 111.6 91.0 27-5 356.7 157.8 60.7 27-6 285.5 122.2 45.5 i
B0023 173-3 11 777.0 359.2 0.0 1-2 710.6 326.0 43.2 e" ' 2-1 718.3 329.8 281.1 i 2-2 784.0 362.7 0.0 3-1 777.0 359.2 -151.4 3-2 609.6 275.5 -21.6 4-1 662.2 301.8 64.9 , 4-2 530.5 235.9 43.2 5-1 618.7 280.1 . 518.9 5-2 694.8 318.1 -194.6 6-1 1,013.0 477.2 -21.6 4 6-2 947.1 444.2 173.0 7-1 670.5 306.0 -43.2 7-2 686.8 314.1 -64.9 8-1 694.8 318.1 -86.5 8-2 590.9 266.2 -64.9 I 9-1 662.2 301.8 -216.2 9-2 551.4 246.4 -64.9 10-1 609.6 ~ 275.5 194.6 10-2 662.2 301.8 151.4 11 1 1,054.5 497.9 -108.1 11-2 1,049.4 495.4 367.6 12 1 740.9 341.2 -129.7 12-2 653.8 297.6 0.0 169-3 13-1 60 1,113.6 521.3 52.5 1 13-2 1,241.5 585.2 157.4 , 14-1 1,141.8 535.4 629.4 ., 14-2 1,176.0 552.5 340.9 15-1 1,182.8 555.8 314.7 15-2 1,113.6 521.3 52.5
Page 2

TSABS:V2.7.0.a.5.28.%
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I Plant Systems Corrected Field Activity Values , Total Surface Activity - Beta Survey
~~-{U555 m a. ,._ Zg i Location Code: D2200TZZZZEZ Comraents: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level.~~
Bold values exceed 3,000.0 dpm/100 cm2 Italic values exceed 4.000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0023 169-3 16-1 60 1,113.6 521.3 104.9 T01 16-2 1.222.2 575.6 -340.9 17-1 1.127.8 528.4 104.9 17-2 1,228.7 578.8 -209.8 18-1 1,069.9 '499.4 -104.9 18-2 1,176.0 552.5 -367.2 269-3 19-1 240 1,107.2 527.5 -730.9 19-2 1,032.4 490.2 211.6 191 3 20-1 60 1,077.3 503.1 -524.5 20-2 1,069.9 499.4 -472.1 21 1 1,113.6 521.3 131.1 21-2 1,446.2 687.6 26.2 22 1 1,077.3 503.1 -340.9 22-2 1,031.9 480.4 -367.2 23-1 916.5 422.7 -26.2 23-2 1,077.3 503.1 -314.7 24-1 1,031.9 480.4 -445.8 24-2 942.5 435.7 -445.8 173-3 25-1 15 627.7 284.5 -216.2 25-2 561.6 251.5 -259.5 26-1 571.6 256.5 86.5 26-2 590.9 266.2 -64.9 234-3 28 1 240 1,308.8 629.4 -681.1 28-2 1,480.6 715.4 607.5 28-3 1,526.0 738.1 589.1 29-1 1,205.4 577.8 -128.9 29-2 1,270.3 610.2 -184.1 29-3 1.264.3 607.2 110.5 209-3 30-1 60 1,375.3 655.4 23.8 30-2 1,346.9 641.2 404.8 i O Page 3:TSABS:V2.7.0.a.5.28.96 Page 13
Graph of Activity versus Location Series -
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~~Total Surface Activity - Beta Survey Il53@@~~
- . .J Location Code: D2200TZZZZEZ Survey Reason: T01 - Initial Final Release Medium Codes: B0019, B0023 Average Guideline Value 4000.0 dpm/100 cm' 4 000 - -- - - - -- - - - - - - - - ~ - - - - - - - - - - - - - - - - - - - - - - - -------
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-500- ---------------------------------------------- v a--------- *-* ----- j = -1000 i' '.i W W W W W W 64 W 44 e' J n' d Al iu's' l a' l 6W 44 a' l e' l s' 4 2'2 4 s' i s' i s' l Al 1-2 22 3-2 42 S2 42 72 62 9-210 211212 213-214215216-217 218-21S2 2CL2 212 22-2 23 2 262 252 26-2 Location ID - Number Critical Level --.- MD A -- - Average Guideline Value --.- Activity \
Page 4:TSABS:V2.7.0.a.5.28.96 Page 14
Graph of Activity versus Location Series - l
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~~Total Surface Activity - Beta Survey - ... J ,~~
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Location Code: D2200TZZZZEZ Survey Reason: T01 - Initial Final Release Medium Codes: B0019, B0023 Average Guideline Value 4000.0 dpm/100 cm' 4000 - - - - - - - - - - - 3500- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3000- ------------------------------------------------------------------- 2500- ------------------------------------------------------------------- n h2000- ------------------------------------------------------------------- 8
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Page 5:TSABS:V2.7.0.a.5.28.96 Page 15 _=__ -__ _ _ _ - _ _ _
l l l l l Background Correction Values - ! n () Total Surface Activity - Beta Survey R W 5fE ag3 Location Code: D2200TZZZZEZ i Comments: Field Background (Bkg) reported in epm / detector area. Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0019 219-3 27-1 02201 15 TM001 76.0 0.0 T01 27-2 64.0 27-3 72.0 27 4 40.0 27 5 80.0 27-6 48.0 t 80023 173-3 1-1 07202 204.0 1-2 168.0 0 \ 2-1 2-2 3-1 32 172.0 208.0 204.0 120.0 4-1 144.0 ) 4-2 88.0 i 5-1 124.0 5-2 160.0 1 6-1 360.0 6-2 312.0 7-1 148.0 7-2 156.0 i 8-1 160.0 8-2 112.0 i 9-1 144.0 9-2 96.0 10-1 120.0 10-2 144.0 l 1 11-1 392.0 11-2 388.0 12-1 184.0 l 12-2 140.0 1 169-3 13-1 02100 60 73.0 l 13-2 92.0 l 14-1 77.0 l (f.s) 14-2 82.0 (> 15-1 83.0 . 15-2 73.0 j Page 6:TSABS:V2.7.0.a.5.28.% Page 16 i
Background Correction Values j-I f52@f55 Total Surface Activity - Beta Survey ;.,,,ms Location Code: D2200TZZZZEZ Comments: Field Background (Bkg) reported in epm / detector area. Medium Bkg reported in dpm/100 cm2. Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0023 169 3 16-1 02100 60 TM001 73.0 0.0 T01 16-2 89.0 17-1 75.0 17-2 90.0 18-1 67.0 18-2 82.0 269-3 19-1 02101 240 34.8 19-2 30.0 191-3 20'1 02100 60 68.0 20-2 67.0 21-1 73.0 21-2 127.0 22-1 68.0 22-2 62.0 23-1 48.0 23-2 68.0 24-1 62.0 24-2 51.0 173-3 25-1 02202 15 128.0 25-2 100.0 26-1 104.0 26-2 112.0 234-3 28-1 02101 240 54.0 28-2 69.8 28-3 74.3 29-1 45.5 29-2 50.7 29-3 50.3 209-3 30-1 02310 60 140.0 30-2 134.0 0 Page 7:TSABS:V2.7.0.a.S.28.96 Page 17
Summary of Efficiency Values m== I .N
) Total Surface Activity - Beta Survey l UM@@ == t Location Code: D2200TZZZZEZ ! Survey Reason: T01 - Initial Final Release i
~~i Comments: i Detector Detector Download # Efficiency Model Serial Number -Station #~~
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SEG SP-175-3M PR024349 169-3 0.082 LMI 43-688 PR092525 173-3 0.148 SEG SP-175-3M PR024349 191-3 0.082 LMi 43-98/200 PR117963 209-3 0.042 ; LMI 43-106B PR128919 219-3 0.211 , SEG SP-113-3M PR621311 234-3 0.070 SEG SP-113-3M PR621311 269-3 0.067 4 h O Page 8:TSABS:V2.7.0.a.5.28.96 Page 18
Survey Detection Equipment Used Total Surface Activity - Beta Survey g
;,. ,.,:::n Location Code: D2200TZZZZEZ Survey Reason: T01 - Initial Final Release Medium Codes: B0019, B0023 Download # - Survey User ID M2350 S/N Detector Station Id S/N 169-3 BJB1396/126179 126179 PR024349 173-3 DTS6208/95359 95359 PR092525 191-3 LCF0451/126182 126182 PR024349 209-3 DTS6208/98620 98620 PR117963 219-3 DTS6208/126182 126182 PR128919 234-3 ELS8308/126175 126175 PR621311 269-3 ELS8308/126175 126175 PR621311 1
Program Version: V2.7.0.a.5.28.96 Report Printed At: 01:24:02 PM on 06/03/96 Total Pages: 9 Page 9:TSABS:V2.7.0.a.5.28.96 Page 19
l l l l Statistical Summary p g Removable Surface Activity - Beta Survey m
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Location Code: D2200TZZZZEZ Survey Reason: T01 -Initial Final Release Medium Codes: B0019, B0023 ' t Net dpm/100 cm2 l Upper Confidence Limit (UCL) 3.4 l Mean 2.3 l Maximum 9.7 l Minimum _ -5.8 l Standard De.viation 4.1 l Minimum Detectable Activity 25.5 l Critical Level 9.6 l Samples Reported 35l l Samples Prescribed 35l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 187.5 dpm/100 cm2 YES l Passed l Percent of Samples > 562.5 dpm/100 cm2 0.0 l Passed (3) l Number of Samples > 750.0 dpm/100 cm2 0 l Passed (4) l UCL of Mean less than or equal 750.0 dpm/100 cm2 YES l Passed (3) 10% Test (4) Single Measurement Test . f O j Page 1:RSABS:V2.7.0.a.5.28.% l
~~. Page 20 ,~~
~~Plant Systems Corrected Field Activity Values Removable Surface Activity - Beta Survey~~
~~-MMM m,._3 Location Code: D2200TZZZZEZ Comments: Activity (net). MDA. and ct reported dpm/100 cm s.~~
Underimed values exceed the critical level. Bold values exceed 562.5 dpm/100 cm2 Italic values exceed 750.0 dpm/100 cm2 Medium - RC# Location ID - MDA Critical Activity Reason Code Location # Level Code 80019 26.22942 27 1 24.3 9.0 2.8 T01 26.22943 27-2 24.3 9.0 , 5.1 26.22944 27 3 24.3 9.0 0.5 26.22945 27-4 24.3 9.0 0.5 26.22946 27-5 24.3 9.0 __9.1 26.22947 27-6 24.3 9.0 0.5 80023 26.22194 1-1 23.3 8.5 -3.5 26.22195 2-1 23.3 8.5 1.2 26.22196 3-1 23.3 8.5 -3.5 26.22197 4-1 23.3 8.5 5.8 26.22198 5-1 23.3 8.5 -5.8 26.22199 61 23.3 8.5 3.5 26.22200 71 23.3 8.5 5.8 26.22201 8-1 23.3 8.5 3.5 26.22202 9-1 23.3 8.5 5.8 26.22203 10-1 23.3 8.5 1.2 26.22204 11 1 23.3 8.5 5.8 26.22205 12-1 23.3 8.5 5.8 26.22224 13-1 23.3 8.5 8.1 26.22225 14-1 23.3 8.5 1.2 26.22226 15-1 23.3 8.5 -3.5 26.22227 16-1 23.3 8.5 -3.5 26.22222 17-1 23.3 8.5 5.8 26.22223 13-1 23.3 8.5 1.2 26.23180 19 1 25.5 9.6 5.1 26.22269 20-1 19.0 6.4 6.0 26.22270 21 1 19.0 6.4 6.0 26.22271 22 1 19.0 6.4 6.0 26.22272 23-1 19.0 6.4 1.4 26.22273 24-1 19.0 6.4 3.7 26.22206 25 1 23.3 8.5 1.2 26.22207 26-1 23.3 8.5 3.5 26.22958 28-1 23.6 8.7 7.9 26.21560 29 1 24.9 9.3 -2.3 26.22467 30-1 20.7 7.2 2.8 Page 2:RSABS:V2.7.0.a.5.28.96 Page 21
L 4 _ +a ,.-4. j Graph of Activity versus Location Series - R @ iEI Removable Surface Activity - Beta Survey -.;. a. . Location Code: D2200TZZZZEZ Survey Reason: T01 -Initial Final Release i Medium Codes: B0019, B0023 1 Guideline Value 750.0 dpm/100 cm'
~~800 4~~
700- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4 4 600- -------------------------------------------------------------------- 500- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1 b g 400- -------------------------------------------------------.. ---------- ., s E c. m 300- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - e Z l 200- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - I 100-- - - - - - - - - - - - - - - ' - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 0 : : : : m: :- -:- :- --: +: =: : :=-E: :_ :_%;=
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27.4 s'27.s4 29-1 s' i ' s' i Location ID - Number
~~--- Critical Level --.-- M D A -- -- Guideline Value -.- Activity s~~
Page 3:RSABS:V2.7.0.a.5.28.96 Page 22
Laboratory Equipment Used Removable Surface Activity - Beta Survey g
r. = m Location Code: D2200TZZZZEZ Survey Reason: T01 -Initial Final Release Medium Codes: B0019, B0023 Location Range Survey User ID Laboratory Serial Equipment Number 13-1 BJB1396 LB-5100W SN5100W 14-1 BJB1396 LB-5100W SN5100W 15-1 BJB1396 LB-5100W SN5100W 16-1 BJB1396 LB-5100W SN5100W 17-1 18-1 BJB1396 BJB1396 LB-510CW LB-5100N SN5100W SN5100W h,
19-1 DTS6208 LB-5100W SN5100W 28-1 DTS6208 LB-5100W SN5100W 29-1 DTS6208 LB-5100W SN5100W 30-1 DTS6208 LB-5100W SN5100W 1-1 ELS8308 LB-5100W SN5100W l 2-1 ELS8308 LB-5100W SN5100W l 3-1 ELS8308 SN5100W LB-5100W 4-1 ELS8308 SN5100W LB-5100W 5-1 ELS8308 SN5100W LB-5100W 6-1 ELS8308 SN5100W LB-5100W 7-1 ELS8308 SN5100W LB-5100W 8-1 SN5100W ELS8308 LB-5100W 8-1 ELS8308 LB-5100W SN5100W 10-1 ELS8308 LB-5100W SN5100W Program Version: V2.7.0.a.5.28.96 Report Printed At: 01:17:18 PM on 06/03/96 O Total Pages: 4 Page 4:RSABS:V2.7.0.a.5.28.96 . 1 Page 23 l
I l Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Services gggg
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Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record Contents l Survey Area Survey Area ID: Survey Area Description Pages D4100 System 41, Circulating Water System 2-3 Survey Unit (s) .. i Location Code Survey Unit Description Pages ( D4100 ZZZZZ DZT01 1
\ D4100 ZZZZZ DZG01 System 41, Circulating Water System 4-28 Prepared By: O f m / /0 ~2 Y-SEG Ryffoldi(41 Engineer Date Reviewed By: hJ IN SEG Pyject Radiation Protection Manager / f ra [ 25[4 4 Date Approved By: (7I7 @ / /0/25/9f PSCO Project Radiatioh Protection Manager Date l
Page 1
Scientific Ecology Group, Inc. gg g p Radiological Engineering & Decommissioning Services ~~~ V Fort St. Vrain Nuclear Generating Station Decommissioning Project , Release Record - Survey Area Survey Area ID: D4100 Survey Area
~~Description:~~
Circulating Water System Survey Area Packages: D4100 Circulating Water System j Survey Area Operational History: The Circulating Water System was in operation in its entirety prior to plant shutdown August 18, 1989. The primary purpose of the circulating water system was to provide coolant to the main condenser for use in condensing steam exhausted by the low-pressure turbine, boiler feed pump turbine exhaust steam, and flashed heater drains, and to transfer the heat from the circtilating water to the atmosphere by means of a cooling tower. The system was also used , to remove noncondensible gases collected in the main condenser during the steam l condensation process. System 41 also served as a water reservoir for the fire protection l '( system, and in an emergency, as the back-up to the service water system. The Circulating Water System had no history of radioactive contamination events. The Circulating Water System was surveyed as an Unaffected Survey Unit. Measurement locations are indicated on the attached drawing and location table to designate where sample measurements were collected. Survey Area Decommissioning and Remediation Activities: No radiological decommissioning or remediation was performed for System 41. Isolation and Control Measures: Level 2 Controls l When appropriate, disassembled components were reassembled following survey. If reassembly was delayed or not performed, component openings were sealed with tape or other appropriate material to maintain isolation control. O Page 2
Survey Area
~~Conclusions:~~
The results of total and removable surface activity measurements collected within this survey area meet the criteria for release for unrestricted use. The levels of removable Fe-55 and H-3 detected were also below the criteria for release for unrestricted use. The sediment samples scraped from 100 cm2 areas indicated very low levels of Co-60 well below 1250 dpm. Survey Area
~~References:~~
Initial Radiological Site Characterization Report volumes 1,2,11. System Description (SD-41) Circulating Water System PI-41, PF-41 Discussion with PSCo and Westinghouse Team personnel FSV-FRS-TBD-208, Licensed Material Evaluation at Elevated Plant System Survey Locations i O l O Page 3
q Scientific Ecology Group, Inc. gg (v Radiological Engineering & Decommissioning Services Fort St. Vrain Nuclear Generating Station Decommissioning Project
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Release Record - Survey Unit Survey Package ID: D4100 Location Code: D4100 ZZZZZ DZT01 D4100 Z7.ZZZ DZG01 Group ID Survey Area Number Surface Category Survey Unit Classification D 4100 System Internals DZ (Unaffected) Survey Reason: T01 - Initial Final Release G01 - Investigation Survey Survey Unit
~~Description:~~
System 41, Circulating Water Survey Design: l l Measurement Type No. of Measurements Description l Beta Scan N/A Scanned vicinity of each total surface activity location where accessible. No areas of elevated licensed activity were identified. 1 Total Surface 51 Collected at designated locations from 12 Activity plant system components. ) py Smears 47 Collected at designated locations from 14 I plant system components. Special Samples 6 Tritium and iron-55 removable activity ! samples j 2 Sediment samples l 24 Gamma Exposure rates ! Page 4 I
l Survey Unit Investigations: Investigation No.1 Elevated readings in the range of 1500 - 2400 dpm/100 cm2 were detected during the initial survey of locations 7 and 8. An investigation survey was performed at both locations in accordance with FSV-FRS-TBD-208, Revision 0. Each location was scanned and the area of highest elevated activity identified. At the area of highest elevated activity, a total surface activity measurement was taken and a sediment / scale sample was collected and submitted to radiochemistry for gamma spectroscopy analysis. A second total activity measurement was obtained following the collection of the sediment sample in order to equate the gamma spec ! analysis results to the total surface activity measurement results. The samples were counted long enough to achieve a Co-60 MDA of about 10 pCi. Licensed material slightly above MDA was identified in the sediment sample for location 7. No licensed material was identified in the sediment sample for location 8. Other nuclides identified were naturally occuring (e.g., Th-232 and Pb-212). A licensed activity fraction was calculated for each location. Unless detected, it was assumed that Co-60, Cs-137 and Eu-152 (the isotopes that contribee approximately 97% of the licensed activity at FSV) were present at their respective MDAs thereby yielding a conservative estimate of total licensed activity. The conservative licensed activity fractions were calculated as 0.0848 (for location 7) and 0.0262 (for location 8). These licensed activity fractions were used to calculate a naturally occurring radioactivity background for the measurements taken at these locations. When naturally occurring radioactivity was subtracted, the range of licensed activity (as 2 conservatively estimated) was about 39 dpm/100 cm to 200 dpm/100 cm2 , O Page 5
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Fort St. Vrain Nuclear Generating Station Decommissioning Project Survey Location Summary Survey Measurements Description Imation Location Collected Number I 6 - TSA Main Condenser / Circulating Turbine Bldg. L5. 6 - RSA Water North inlet Tube Sheet Survey Area C006 6-ER and Waterbox. 2 6 - TSA Main Condenser / Circulating Turbine Bldg. L5. 6 - RSA Water South inlet Tube Sheet Survey Area C006 6-ER and Waterbox. 3 6 - TSA Main Condenser / Circulating Turbine Bldg. L5. 6 - RSA Water North Outlet Tube Sheet Survey Area C006 6-ER and Waterbox. 4 6 - TSA Main Condenser / Circulating Turbine Bldg. L5. 6 - RSA Water South Outlet Tube Sheet Survey Area C006 6-ER and Waterbox. 5 3 - TS A 54' L4173-D28, Cire. Water Circulating Water Pit. 3 - RSA Pump Suction Line. Survey Area B003 6 3 - TSA 54' L4179-D28, Circ. Water Circulating Water Pit, 3 - RSA Pump Suction Line. Survey Area B003 7 5 - TSA 24' L4175-D25, Cire. Water Circulating Water Pit, 3 - RSA Pump Suctiou Line. Survey Area B003 1 - Sediment 8 5 - TSA 24' L4177-D25, Cire. Water Circulating Water Pit, 3 - RSA Pump Suction Line. Survey Area B003 1 - Sediment 9 4 - TSA V-4150, Hogger Ejector Suction Turbine Bldg. L6, East 4 - RSA Valve. Survey Area C0023 10 4 - TSA 4' L4162-D25 (Air Ejector Turbine Bldg. L6, East 4 - RSA Vent Line). Survey Area C0023 11 1 - TSA V4162, Air Ejector Vent Line Turbine Bldg. L12, Northwest 1 - RSA Check Valve Survey Area C0043 12 2 - TSA E-3304X, Air Ejector Disch. Turbine Bldg. L6, East 2 - RSA Heat Exchanger Survey Area C0023 O Page 7
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Radiological Engineering & Decommissioning Services -~~ Fort St. Vrain Nuclear Generating Station Decommissioning Project Special SampN Location Code: D4100 ZZZZZ DZT01 Comments: H-3 & Fe-55 activity reported in Net dpm/100 cm2 Sediment Sample activity reported in pCi/g Underlined values exceed the critical level Bold values exceed 250 dpm/100 cm2 Italic values exceed 1,000 dpm/100 cm2 Tritium and Iron-55 Removable Activity Samples Location Type of Critical level MDA Activity Number Sample 1-1 Fe-55/H-3 13.5 30.4 28.5 1-2 Fe-55/H-3 15.6 35.2 48.3 1 1-3 Fe-55/H-3 107.3 219.7 102.6 1-4 Fe-55/H-3 107.3 219.7 62.1 1-5 Fe-55/H-3 14.1 30.5 73.3 1-6 Fe-55/H-3 12.3 26.5 54.4 Sediment Samples
! Licensed Loc. N Nuclide Critical Identified Level MDA Activity 7-1 Co-60 9.76E-02 2.02E-01 3.00E-01 8-1 None 5.29E-02* 1.10E-Ol
N/A

Critical level and MDA reported for Co-60 l
1 Page 8
Exposure Rate Measurements Comments: Exposure Rate reported in pR/hr Location Number Exposure Rate 1-1 3.92 1-2 4.20 1-3 3.01 1-4 3.99 1-5 3.99 1-6 3.92 2-1 3.15 2-2 3.25 2-3 3.64 2-4 2.94 2-5 3.04 2-6 3.34 3-1 2.80 3-2 1.66 3-3 3.20 3-4 1.92 3-5 2.66 3-6 1.75 4-1 2.24 4-2 2.80 4-3 1.68 4-4 1.77 4-5 1.63 4-6 2.01 O Page 9
1 Exposure Rate Measurement Summary No. Location Meas. Minimum Maximum Mean 1 6 3.01 4.20 3.84 2 6 2.94 3.64 3.23 3 6 1.66 3.20 2.33 4 6 1.63 2.80 2.02 l i Comments:
The exposure rates taken in the Main Condenser Waterboxes (locations 1-4) are uncorrected for background or PIC response (i.e., the measurements are gross Nal(TI) results). Although not required, these measurements were taken to provide qualitative information on the radiological condition inside the waterboxes.
The uncorrected exposure rates inside the waterboxes were all less than 5 pR/hr and were . lower than general area uncorrected exposures outside the waterboxes, which were about l 10.5 R/hr. Therefore, these measurements do not indicate that significant contamination is present in the waterboxes, , l l i 4 i l i l Page 10 l i
Compilation of Statistical Summaries Total Surface Activity - Beta Survey hd@@
.r .:=::~.::=.1 Removable Surface Activity - Beta Survey Location Code: D4100TZZZZDZ Medium Codes: B0019, B0020, B0023, B0031, G9999 Comments: Total Surface Activity (TSA) reported in Net dpm/100 cm2 Removable Surface Activity (RSA) reponed in Net dpm/100 cm2 TSA RSA Upper Confidence Limit (UCL) hican 316.3 252.5 3.3 2.0 h
hfaximum 1,172.3 14.3 hiinimum -571.2 -6.5 Standard Deviation 270.7 5.4 hiinimum Detectable Activity 1,067.8 24.3 Critical Level 511.1 9.0 Samples Reported 51 47 l Samples Prescribed 51 47 i O Page 1: ERGS:V2.10.2.a.8.19.96 Page 11 ; l l
Statistical Summary Total Surface Activity - Beta Survey p=g,_ g Location Code: D4100TZZZZDZ Survey Reasons: G01 - Investigation, T01 - Initial Final Release ; Medium Codes: B0019, B0020, B0023, B0031, B1037, B1038, B1039, B1040, B1041, B1042, - B1043, B1044 I Net dpm/100 cm2 l Upper Confidence Limit (UCL) 316.3 l ; l Mean 252.5 l l l Maximum 1,172.3 l l Minimum -571.2 l 7 p l Standard Deviation 270.7 l O l Minimum Detectable Activity 1,067.8 l , l Critical Level 511.1 l l Samples Reported 51 l l Samples Prescribed 51 l i Tests Performed l Samples Reported greater than o'r equal to Samples Prescribed YES l Passed j l MDA < 1,250.0 dpm/100 cm2 YES l Passed l l Percent of Samples > 1,250.0 dpm/100 cm2 0.0 l Passed (5) l l Number of Samples > 2,500.0 dpm/100 cm2 0 l Passed (6) l l UCL of Mean less than or equal 5,000.0 dpm/100 cm2 YES l Passed l l (5) 25% Test (6) Single Measurement Test ; tm
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Page 1:TSABS:V2.10.2.a.8.19.96 FS TA .FSL
n - Plant Systems Corrected Field Activity Values Total Surface Activity - Beta Survey g
~~;;.;=,,, a Location Code: D4100TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level.~~
Bold values exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # . Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0019 845-1 1-1 15 569.3 263.2 -15.8 T01 1-2 446.6 201.9 174.3 1-3 491.3 224.2 491.1 1-4 418.8 187.9 697.0 1-5 459.9 208.5 411.9 1-S 425.9 191.5 411.0 2-1 537.4 247.2 79.2 2-2 485.2 221.1 364.4 2-3 574.4 265.8 602.0 2-4 542.8 250.0 538.6 2-5 446.6 201.9 205.9 2-6 569.3 263.2 63.4 3-1 472.7 214.9 332.7 3-2 558.9 258.0 332.7 3-3 433.0 195.0 285.1 3-4 380.7 168.9 269.3 3-5 418.8 187.9 142.6 3-6 446.6 201.9 . 237.6 4-1 485.2 221.1 1.172.3 4-2 497.3 227.2 380.2 4-3 558.9 258.0 269.3 4-4 396.4 176.7 332.7 4-5 439.9 198.5 253.5 4-6 497.3 227.2 285.1 B0020 S35-1 9-1 180 888.9 420.7 122.4 9-2 852.7 402.7 122.4 9-3 896.7 424.7 71(LB 9-4 856.8 404.7 69.9 839-1 10-1 600 670.4 327.5 183.3 10-2 698.6 341.5 154.6 10-3 658.4 321.4 194.7 10-4 683.3 333.9 252.0 918-1 11-1 180 1,067.8 511.1 -571.2 Page 2:TSABS:V2.10.2.a.8.19.96 Page 13
Plant Systems Corncted Field Activity Values Total Surface Activity - Beta Survey g gg.= ,. d.. Location Code: D4100TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlmed values exceed the critical level. Bold values exceed 1,250.0 dpm/100 crr2 Italic values exceed 5,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # . Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0023 525-3 5-1 15 550.5 254.3 572.0 T01 5-2 467.4 212.8 216.4 5-3 550.5 254.3 355.6 6-1 519.0 238.6 309.2 6-2 401.5 179.8 278.3 6-3 519.0 238.6 -108.2 609-3 7-5 30 628.4 299.9 252.6 G01 8-5 644.2 307.8 231.6 B0031 835-1 12-1 180 1,000.2 506.4 559.5 T01 O 12-2 1,040.4 496.5 646.9 O , l B1037 ! 524-3 71 15 882.1 413.3 200.0 l B1038 7-2 919.8 432.1 140.5 l i Page 3:TSABS:V2.10.2.a.8.19.% Page 14 j
Plant Systems Corrected Field Activity Values Total Surface Activity - Beta Survey I I-Ed@S g
~~,y:mm Location Code: D4100TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level.~~
Bold values exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # . Location ID - Count MDA Criticel Activity Reason Code Station # Location # Time Level Code B1039 524-3 7-3 15 1.005.2 474.8 150.1 T01 B1040 609-3 7-4 30 676.4 323.9 143.2 G01 O B1041 524-3 8-1 15 950.9 447.7 48.7 T01 B1042 8-2 882.1 413.3 38.9 l O Page 4:TSABS:V2.10.2.a.8.19.96 , Page 15 ! 1
Plant Systems Corrected Field Activity Values - iO Total Surface Activity - Beta Survey ----- d@@ Location Code: D4100TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # Location ID - Count MDA Critical Activity Reason : Code Station # Location # Time Level Code B1043 524-3 8-3 15 945.8 445.1 41.5 T01 B1044 609-3 84 30 659.5 315.5 49.8 G01 O l O Page 5:TSABS:V2.10.2.a.8.19.% Page 16 l
J Graph of Activity versus Location Series I-1 Total Surface Activity - Beta Survey i.c.f$ am DSS Location Code: D4100TZZZZDZ Survey Reasons: G01 - Investigation, T01 - Initial Final Release J 4 Medium Codes: B0019, B0020, B0023, B00:ll, B1037, B1038, B1039, B1040, B1041, B1042, B1043, B1044 ^ Average Guideline Value l 5000.0 dpm/100 cm' 2500 2000- ------ ----------------------------------------------------------- 1500- ---- ------ --------------------------- ------------ --------- --- 1000 + - - -------- ------ --- ------------ --
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/3 Background Correction Values U Total Surface Activity - Beta Survey -d@@
~~r,,n=: =,_ Location Code: D4100TZZZZDZ Comments: Field Background (Bkg) reported in epm / detector area.~~
~~. Medium Bkg reported in -dpm/100 cm2 i Count time reported in seconds.~~
Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0019 845-1 1-1 02200 15 TM001 204.0 0.0 T01 1-2 120.0 1-3 148.0 1-4 104.0 15 128.0 1-6 108.0 , 2-1 180.0 2-2 144.0 2-3 208.0 2-4 184.0 2-5 120.0 O 2-6 204.0 V 3-1 3-2 136.0 196.0 3-3 112.0 3-4 84.0 3-5 104.0 3-6 120.0 4-1 144.0 4-2 152.0 4-3 196.0 4-4 92.0 4-5 116.0 4-6 152.0 B0020 835-1 9-1 02000 180 35.7 9-2 32.7 9-3 36.3 9-4 33.0 839-1 10-1 02101 600 60.4 10-2 65.7 O d 10-3 10-4 58.2 62.8 918-1 11-1 02000 180 TS001 57.0 Page 7:TSABS:V2.10.2.a.8.19.% Page 18
Background Correction Values Total Surface Activity - Beta Survey g ra= . Location Code: D4100TZZZZDZ Comments: Field Background (Bkg) reported in cpm / detector area. Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code 80023 525-3 5-1 02200 15 TM001 200.0 0.0 T01 5-2 140.0 5-3 200.0 6-1 176.0 6-2 100.0 6-3 176.0 609-3 7-5 02202 30 300.0 G01 8-5 316.0 B0031 835-1 12-1 02000 180 51.7 T01 12-2 49.7 B1037 524-3 7-1 02203 15 300.0 2,159.0 B1038 7-2 328.0 1,521.0 0 Page 8:TSABS:V2.10.2.a.8.19.96 Page 19
~~/O Background Correction Values A Total Surface Activity - Beta Survey lS555 n;;.= ,. y a Location Code: D4100TZZZZDZ l~~
Comments: Field Background (Bkg) reported in epm / detector area. Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Iar.stion ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code
~~. B1039 524-3 7-3 02203 15 TM001 396.0 1,614.0 T01 B1040 4~~
609-3 7-4 02202 30 350.0 1.541.0 G01 O , l I B1041 . 524-3 8-1 02203 15 352.0 1,818.0 T01 B1042 8-2 300.0 1.438.0 i i O Page 9:TSABS:V2.10.2.a.8.19.96 Page 20
Background Correction Values Total Surface Activity - Beta Survey gyIS7J@
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h Location Code: D4100TZZZZDZ Comments: Field Background (Bkg) reported in epm / detector area. Medium Bkg reponed in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # colurnn. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B1043 524-3 8-3 02203 15 TM001 348.0 1,538.0 T01 B1044 609-3 8-4 02202 30 332.0 1,866.0 G01 s O Page 10:TSABS:V2.10.2.a.8.19.96 Page 21
f Summary of Efficiency Values Total Surface Activity - Beta Survey 9,gg j-
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Location Code: D4100TZZZZDZ Survey Reasons: G01 - Investigation, T01 - Initial Final Release Comments: Detector Detector Download # Efficiency Model Serial Number -Station # LMI 43-106/S PR128920 524-3 0.156 LMI 43-68B PR119340 525-3 0.207 LMI 43-68/S PR119340 609-3 0.152 LMI 44-40B PR095101 835-1 0.123 SEG SP-113-3M PR024351 839-1 0.090 LMI 43488 PR095083 845-1 0.202 LMI 44-40B PR119455 918-1 0.128 O [ Page 11:TSABS:V2.10.2.a.8.19.96 Page 22
Survey Detection Equipment Used Total Surface Activity - Beta Survey g g.ra,g , Location Code: D4100TZZZZDZ Survey Reasons:' G01 - Investigation, T01 - Initial Final Release afedium Codes: B0019, B0020, B0023, B0031, B1037, B1038, B1039, BIMO, B1041, B1042, B1043, BlM4 Download # - Survey User ID A12350 S/N Detector Station Id S/N 524-3 AOK2982/126182 126182 PR128920 525-3 DAB 9854/117566 117566 PR119340 4 609-3 AOK2982/117566 117566 PR119340 835-1 KDE9135/98620 98620 PR095101 839-1. KDE9135/98643 98643 PR024351 845-1 KDE9135/98620 98620 PR095083 918-1 DLB6373/117573 117573 PR119455 Program Version: V2.10.2.a.8.19.96 Report Printed At: 11:23:19 AM on 08/30/96 Total Pages: 12 Page 12:TSABS:V2.10.2.a.8.19.96 Page 23
Statistical Summary
~~-g Removable Surface Activity - Beta Survey jg =,._~~
Location Code: D4100TZZZZDZ Survey Reason: T01 - Initial Final Release Medium Codes: B0019, B0020, B0023. B0031 Net dpm/100 cm2 l Upper Confidence Limit (UCL) 3.3 l l Mean 2.0 l l Maximum 14.3 l l Minimum -6.5 l p l Standard Deviation 5.4 l b l Minimum Detectable Activity 24.3 l l Critical Level 9.0 l l Samples Reported 47l l Samples Prescribed 47l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 250.0 dpm/100 cm2 YES l Passed ; l Percent of Samples > 250.0. dpm/100 cm2 0.0 l Passed (3) l Number of Samples > 500.0 dpm/100 cm2 0 l Passed (4) l UCL of Mean less than or equal 1,000.0 dpm/100 cm2 YES l Passed (3) 10% Test (4) Single Measurement Test l Page 1:RSABS:V2.10.2.a.8.19.96 Page 24 FSR_ STAT.FSL j
Plant Systems Corrected Field Activity Values == Removable Surface Activity - Beta Survey l5d@$
~~=.=._-. a-Location Code: D4100TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level.~~
Bold values exceed 250.0 dpm/100 cm2 Italic values exceed 1,000.0 dpm/100 cm2 Medium RC# Location ID - MDA Critical Activ'tv Reason Code Location # Level- Code B0019 26.10534 1-1 23.6 8.7 3.2 T01 26.10535 1-2 23.6 8.7 12.5 26.10536 1-3 23.6 8.7 10.2 26.10537 1-4 23.6 8.7 0.9 26.10538 1-5 23.6 8.7 0.9 26.10539 1-6 23.6 8.7 3.2 26.10540 2-1 23.6 8.7 -3.7 26.10541 2-2 23.6 8.7 . 12.5 26.10542 2-3 23.6 8.7 -6.0 26.10543 2-4 23.6 8.7 1.4 26.10544 2-5 23.6 8.7 7.9 26.10545 2-6 23.6 8.7 -1.4 26.10567 3-1 22.9 8.3 -0.9 26.10568 3-2 22.9 8.3 -3.2 26.10569 3-3 22.9 8.3 -0.9 26.10570 34 22.9 8.3 -0.9 26.10571 3-5 22.9 8.3 -0.9 26.10572 3-6 22.9 8.3 10.6 26.10561 4-1 22.9 8.3 1.4 26.10562 4-2 22.9 8.3 3.7 26.10563 4-3 22.9 8.3 1.4 26.10564 4-4 22.9 8.3 3.7 26.10565 4-5 22.9 8.3 1.4 26.10566 46 22.9 8.3 -3.2 80020 26.10404 9-1 21.5 7.6 __ . i t6 26.10405 9-2 21.5 7.6 4.6 26.10406 9-3 21 5 7.6 0.0 26.10407 9-4 21.5 7.6 0.0 26.10499 10-1 23.6 8.7 0.9 26.10500 10-2 23.6 8.7 3.2 26.10501 10-3 23.6 8.7 0.9 26.10502 10-4 23.6 8.7 -3.7 26.12265 11-1 23.3 8.5 3.5 Page 2:RSABS:V2.10.2.a.8.19.96 Page 25
() v Plant Systems Corrected Field Activity Values
-R M Lis Removable Surface Activity - Beta Survey g r a ._-. a Location Code: D4100TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. .
Bold values exceed 250.0 dpm/100 cm2 Italic values exceed 1,000.0 dpm/100 cm2 Medium RC # Location ID - MDA Critical Activity Reason Code Location # Level Code B0023 26.32515 5-1 24.3 9.0 -1.9 T01 26.32516 5-2 24.3 9.0 -1.9 26.32517 5-3 24.3 0.0 -6.5 26.32518 6-1 24.3 9.0 -1.9 26.32519 6-2 24.3 9.0 -1.9 26.32520 6-3 24.3 9.0 0.5 26.32524 7-1 24.3 9.0 14.3 26.32525 7-2 24.3 0.0 5.1 26.32526 7-3 24.3 9.0 7.4 , 26.32521 8-1 24.3 9.0 14.3 i 26.32522 8-2 24.3 9.0 2.8 ' O 26.32523 8-3 24.3 9.0 2.8 l V i B0031 26.10372 12-1 22.6 8.2 -5.3 26.10373 12-2 22.6 8.2 -5.3 I Page 3:RSABS:V2.10.2.a.8.19.96 Page 26
Graph of Activity versus Location Series - Removable Surface Activity - Beta Survey M Id r.c=;.,,, a Location Code: D4100TZZZZDZ Survey Reason: T01 - Initial Final Release Medium Codes: B0019, B0020, B0023, B0031 4 Guideline Value 1000.0 dpm/100 cm'
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~~Page 4:RSABS:V2.10.2.a.8.19.96~~
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~~l O. Laboratory Equipment Used U Removable Surface Activity - Beta Survey~~
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Location Code: D4100TZZZZDZ l Survey Reason: T01 - Initial Final Release Medium Codes: B0019, B0020, B0023, B0031 Location Range Survey User ID Laboratory Serial Equipment Number 5-1 to 5-3 DPS4133 LB-5100W SN5100W 6-1 to 6-3 DPS4133 LB-5100W SN5100W 7-1 to 7-3 DPS4133 LB-5100W SN5100W 8-1 to 8-3 DPS4133 LB-5100W SN5100W t O'- 11-1 JDT2759 LB-5100W SN5100W 9-1 to 94 KDE9135 LB-5100W SN5100W 12-1 to 12-2 KDE9135 LB-5100W SN5100W 1-1 to 1-6 VMB6153 LB-5100W SN5100W 2-1 to 2-6 VMB6153 LB-5100W SN5100W 3-1 to 3-6 VMB6153 LB-5100W SN5100W 4-1 to 4-6 VMB6153 LB-5100W SN5100W 10-1 to 10-4 VMB6153 LB-5100W SN5100W , 5 Program Version: V2.10.2.a.8.19.96 i Report Printed At: 11:35:13 AM on 08/30/96 Total Pages: 5 Page 5:RSABS:V2.10.2.a.8.19.% Page 28 l
l I Scientific Ecology Group, Inc.
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ggg l Radiological Engineering & Decommissioning Services O (v Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record Contents Survey Area Survey Area ID: Survey Area Description Pages D4200 System 42, Service Water System 2-3 Survey Unit (s) Location Code Survey Unit Description Pages 2M MEDml System 42, Service Water System 4-35 O V. Prepared By: Oa//#d- / + 2r-x SEG po}6'pcal Engineer Date Reviewed By: h* SEG Prfect Radiation Protection Manager
~~/ 8 0 /*' [W Date Approved By: [_ s /04. g f. B o na r / /s/24/f4 PSCO Project Radiation Protection Manager Date O~~
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Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Services g~~~ () Fort St. Vrain Nuclear Generating Station Decommissioning Project U Release Record - Survey Area Survey Area ID: D4200 Survey Area
~~Description:~~
Service Water System Survey Area Packages: D4200 Service Water System 4 d Survey Area Operational History: The Service Water System was in operation in its entirety prior to plant shutdown August 18, 1989. Portions of the service water system are currently in operation. The purpose of the Service Water System was to provide cooling water for process heat removal from all auxiliary equipment in the turbine plant and the equipment served by the reactor plant cooling water system. The turbine side of the service water system is currently in service and will be used for repower activities. (V) The Service Water System had no history of radimetive contamination events. The Service Water System was surveyed as an Unaffected Survey Unit. Measurement locations were marked on the attached maps to designate where sample measurements were collected. Survey Area Decommissioning and Remediation Activities: j No radiological decommissioning or remediation was performed for System 42. The supply and return headers to the reactor building were cut and capped on the turbine side during decommissioning activities. Isolation and Control Measures: Level 2 Controls When appropriate, disassembled components were reassembled following survey. If twsembly was delayed or not performed, component openings were sealed with tape or other appropriate material to maintain isolation control. (G) Page 2
Survey Area
~~Conclusions:~~
The results of total and removable surface activity measurements collected within this survey area meet the criteria for release for unrestricted use. The level of Fe-55 and H-3 detected was below the Minimum Detectable Activity for Fe-55 and H-3. The sediment sample results indicated very low levels of Cs-137 and Co-60. The coupon sample results indicated very low levels of Cs-137 and Co-60 that were well below the action level for unaffected systems of 1250 dpm/100cm2 . Survey Area
~~References:~~
Initial Radiological Site Characterization Report volumes 1,2,11. System Description (SD-42) Service Water System PI-42-(1-3), PF-42-1 Discussion with PSCo and Westinghouse Team personnel O O; i Page 3
Scientific Ecology Group, Inc. gg Radiological Engineering & Decommissioning Services ~~~~ O v Fort St. Vrain Nuclear Generating Station Decommissioning Project : Release Record - Survey Unit Survey Package ID: D4200 Location Code: D4200 ZZZZZ DZ Group ID Survey Area Number Surface Category Survey Unit Classification D 4200 System Internals DZ (Unaffected) l Survey Reason: T01 - Initial Final Release E01 - Replacement Survey Survey Unit
~~Description:~~
System 42, Service Water Survey Design: Measurement Type No. of Measurements Description Beta Scan N/A Scanned vicinity of each total surface activity location where accessible. No areas of elevated licensed activity were identified. Total Surface 32 Collected at designated locations from 12 Activity plant system components. py Smears 30 Collected at designated locations from 14 plant system components. Special Samples 1 Tritium and iron-55 removable activity sample 6 Sc(iment samples 5 , Coupon samples 4 f Page 4
Survey Unit Investigations: Investigation No.1 g The survey of locations 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 indicated elevated readings in a range from about 3000 dpm/100 cm' to 5000 dpm/100 cm2 . Sediment samples collected at locations 4, 5, and 6 indicated low levels of Cs-137 slightly above MDA, with a maximum value of 0.045 pCi/g (i.e. 0.1 dpm/g), which is below the envionmental background level for Cs-137 in soil. Low levels of Co-60 were also detected in the location 4 sediment sample (0.18 dpm/g). Since this system was not expected to be contaminated, and the very low levels of licensed activities detected did not account for the elevated readings, naturally occurring radioactivity was suspected. An investigation was performed on locations 4, 5, 6, 9, and 10 in accordance with FSV-FRS-TBD-208, Revision 0. These locations included 5 of the 6 highest elevated readings. First, the area containing the highest activity inside each location was identified. Then, the identified area was removed and cut up so that the coupon sample would fit inside the gamma spectroscopy counting shield. The samples were then counted long enough to achieve a Co-60 MDA of about 25 pCi. The predominate radionuclides detected from the coupon sample counts was naturally occurring (e.g., Th-234, Pb-212, etc.). However, licensed material slightly above MDA was identified on 3 of the 5 coupon samples. The maximum Co-60 concentration was 1.05 times MDA. The maximum Cs-137 concentration
.was 1.3 times MDA. These very low licensed activity levels have previously been identified in the empty detector well. Although the well was cleaned prior to counting the coupon samples, it is considered questionable whether these low levels of activity are really present g
on the coupon samples due to the very long count time utilized (60,000 seconds). However. because they were detected, they are accounted for in calculating the licensed activity fraction. Further investigation would provide limited benefit due to the very low activities ! present. ! l A conservative licensed activity fraction was calculated for each location. For samples ; where no licensed activity was identified, it was assumed that Co-60, Cs-137 and Eu-152 ) (the isotopes that contribute to approximately 97% of the licensed activity at FSV) were l present at their respective MDAs. The maximum licensed activity fraction was calculated as j 0.0965 for the coupon samples. This licensed activity fraction was used to calculate a naturally occurring radioactivity background for each measurement location. The maximum licensed activity fraction was applied to those locations where coupon samples were not collected. O l Page 5 l l j
~~-. -- . . .- . . - - _ - _ - ~ - - -.-~~
Investigation No. 2 l ' l The final survey measurements for location 3 in D4200 (Service Water System) were
~~surveyed with LMI 43-68/SN#95535 whose response has been determined to be erratic. l 4~~
To determine whether a measurement bias exists for system survey detectors, each detector 4 used to survey Group D systems was evaluated. This evaluation was performed by plotting i 3 all of the final survey measurement net results (to date) for Group D systems (plots are l attached for reference). From the plo'.s, trends were revealed for two detectors. These were
~~the LMI 43-98 #123601 (a 1.5" diameter cylindrical gas flow detector) and the LMI 43-68 '~~
~~i #95535 (a 125 cm2 gas flow detector). The LMI 43-98 #123601 indicated a trend toward j negative measurement results. The LMI 43-68 #95535 (which was used to collect survey~~
~~data for location 3 in D4200) displayed large variation in measurement results. The other~~
! detectors used did not display any significant measurement problems or bias. ! Due to their suspect behavior, the LMI 43-98 #123601 and LMI 43-68 #95535 were pulled from service for evaluation. Evaluations conducted with the background shield normally ,
used with LMI 43-98/#123601 revealed that an increase in count rate occurred when the detector was shielded with the background shield. However, the detector did not show an i increase in count rate when an alternate shield was used. The original shield was subsequently removed from service. LMI 43-68/#95535 was evaluated to determine the cause of its erratic response. A bad cable was suspected to be the problem and was i replaced. After replacing the cable, the detector was tested and found to be operating Properly.
I All final survey measurements (including measurements taken from other packages) that were l 1 initially surveyed with either the LMI 43-98 #123601 or LMI 43-68 #95535 were evaluated
~~and resurveyed as necessary with different detectors. Location 3 was resurveyed for i 2~~
D4200. The original survey (located in download #797-1), was replaced with download 312- l 3. l The replacement data did not indicate any significant trends or elevated readings. 4 4 i i l 1 iO Page 6
I Investigation No. 3 The MDA values for location 12 exceeded 25% of the guideline value for unaffected systems (1250 dpm/100cm2 ). .The MDAs for location 12, measurements 1 and 2 were 1380 and 1343 dpm/100cm2 , respectively. Both measurements taken at location 12 were greater than MDA at 4779.4 (SML 12-1) and 5201.0 (SML 12-2) dpm/100 cm2. Because activity significantly greater than MDA was 3 detected, it was of no consequence that calculated MDA values were slightly greater than the j target MDA level of 1,250 dpm/100 cm2 , Because elevated activity was also found at other locations in D4200, coupon samples were collected from the system and analyzed to determine a natural radioactivity background correction value. The gamma isotopic analysis indicated predominately natural occuring radionuclides (see Investigation #1). The coupon sample analysis was conducted such that a total licensed material MDA (i.e., summing MDAs from Co-60, Cs-137 and Eu-142, which 2 contribute 97% of the licensed activity at FSV) was well below 1,250 dpm/100 cm . l The measurements collected at location 12 are retained in the database. The gross measurement results have been corrected for natural occurring radioactivity as determined from the coupon samples taken from the system (see Investigation #1). The corrected results at location 12 are below unaffected system unrestricted use release criteria. No further [ a: tion was necessary.
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Fort St. Vrain Nuclear Generating Station Decommissioning Project Survey Location Summary Survey Measurements Description Imation Imation Collected Number I 1 4 - TSA F-4201, Service Water Servke Water Purn House, 4 - RSA Strainer Survey Area B004 1 - Sediment 2 2 - TSA E-5108SX (Generator Stator Turbine Building Level 6, 2 - RSA Liquid Cooler) Southwest, Survey Area C0020 3 4 - TSA E-5106X (Turbine Lube Oil Turbine Building Level 5, 4 - RSA Cooler) Turbine Lube Oil Room, Survey Area C0008 , 4 3 - TSA 4" L4261 (BFP Lube Oil Turbie. Building Level 5, 1 - RSA Cooler Return Line) northeast, Survey Area C0013 1 - Sediment 1 - Coupon ; 5 2 - TSA 2" L4557 (EHC Cooler E- Turbine Building Level 5, 1 - RSA 5109X supply piping) north, EHC skid, Survey Area 1 - Sediment C0007 1 - Coupon 6 2 - TSA 2" L4557 (EHC Cooler E- Turbine Building Level 5, 1-RSA 5109X supply piping, cross- north, EHC skid, Survey Area 1 - Sediment connect with Fire Protection C0007 1 - Coupon piping) 7 2 - TSA V-42102 (Outlet Isolation Turbine Building Level 6, 3 - RSA valve from E-4202 - Decay northwest, Survey Area C0023 Heat Removal Heat Exchanger) O Page 9 ,
M. Survey Measuranents Dacription Imcation O 14 cation Number Collected ! i , 8 2 - TSA 6" L42118 and 8" L42253 Turbine Building Level 5, 4 - RSA (Supply Piping to "A" Diesel south, Survey Area C0011 : Generator) 9 2 - TSA 2" L42146 (Outlet piping Turbine Building Level 5, 1 - RSA from Heater Drain Pump north, Survey Area C0007 1 - Sediment P3201) 1 - Coupon 10 3 - TSA V4253 (E-5105X Hydrogen Turbine Building Level 6, 2 - RSA Cooler Outlet Isolation Valve) Column C-3, Survey Area 1 - Valve Disk C0020 11 3 - TSA V-4245 (E-5103X Hydrogen Turbine Building level 6, 2 - RSA Cooler Inlet Isolation Valve) central, Survey Area C0020 12 2 - TSA 1.25" L4207 (Supply Piping Turbine Building Level 5, O 1 - RSA 1 - Sediment to Service Air Compressor Aftercooler E-8202X) northwest, Survey Area C0010 13 1 - RSA 4" L4259 (Supply Piping to Turbine Building Level 5, Boiler Feed Pump Lube Oil east, Survey Area C0013 Cooler E-3109X) l 14 1 - RSA V42113 (Inlet Isolation Valve Turbine Building Level 5, I to Boiler Feed Pump Lube southeast, Survey Area C0013 Oil Cooler E-3107X)
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1 l l Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Services ggg
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g Fort St. Vrain Nuclear Generating Station Decommissioning Project Special Samples Location Code: D4200 ZZZZZ DZ Comments: 11-3 & Fe-55 activity reported in Net dpm/100 cm2 Sediment Sample activity reported in pCi/g Coupon Sample activity reported in total pCi Underlined values exceed the critical level Bold values exceed 250 dpm/100 cm2 Italic values exceed 1,000 dpm/100 cm2 Tritium and Iron-55 Removable Activity Samples Location Type of Critical Level MDA Activity Number Sample 3-1 Fe-55/11-3 18.2 41.2 35.4 g' Sediment Samples Licensed Loc. # Nuclide Critical Identified Level MDA Activity 4-1 Co-60 2.71E-02 5.65E-02 7.71E-02 i ' Cs-137 2.52E-02 5.21E-02 4.47E-02 5-1 Cs-137 1.00E41 2.04E-01 3.23E-01 6-1 Cs-137 1.27E-01 2.58E-01 3.70E-01 8-1 None 4.53E-02' 9.45E-02' N/A 9-1 None 1.49E-01' 3.19E-01' N/A 12-1 Cs-137 9.77E-02 1.98E-01 1.44E-01 Critical Izvel and MDA reported for Co-60 0 Page 11
Coupon Samples O Licensed Location Nuclide Critical Number Identified 14 vel MDA Activity 4-1 None 12.4' 25.48 N/A 5-1 Cs-137 7.41 15.3 19.1 6-1 Cs-137 9.29 19.1 24.3 9-1 Co-60 7.00 14.6 15.4 Cs-137 7.79 16.0 20.1 10-1 Cs-137 5.67 11.8 11.5 Critical Level and ATITA reponed for co-60 1 O t 1 O Page 12
m _ Compilation of Statistical Summaries Total Surface Activity - Beta Survey [RMf3fEi r..= = = = = a Removable Surface Activity - Beta Survey Location Code: D4200TZZZZDZ 51edium Codes: B0020, B0023, B0031 Comments: Total Surface Activity (TSA) reported in Net dpm/100 cm2 . Removable Surface Activity (RSA) reported in Net dpm/100 cm2 TSA RSA Upper Confidence Limit (UCL) hiean 358.1 281.2 4.5 2.7 g hiaximum 977.5 15.5 hiinimum -463.9 -5.6 Standa'rd Deviation 258.4 5.8 hiinimum DetectIEle Activity 1,380.1 25.8 Critical Level 653.4 9.8 Samples Reported 32 30 l Samples Prescribed 32 30 i l Page 1: ERGS:V2.7.0.a.5.28.96 Page 13
d j Statistical Summary Total Surface Activity - Beta Survey g g=,__ Location Code: D4200TZZZZDZ , Survey Reasons: T01 - Initial Final Releas .01 - Replacement Medium Codes: B0023, B0031, B10CM, B1005, B1006, B1007, B1008, B1009, B1010, B1011, B1012, B1013, B1014, B1015, B1016, B1017, B1018, B1019, B1020, B1021, B1022, B1023, B1024, B1025, B1026, B1027 ; i Net dpm/100 cm2 , l Upper Confidence Limit (UCL) 358.1 l l Mean 281.2 l l Maximum 977.5 l l Minimum -463.9 l j l Standard Deviation 258.4 l . l Minimum Detectable Activity 1,380.1 l l Critical Level 653.4 l l Samples Reported 32l 4 l Sampies Prescribed 32l l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 1,250.0 dpm/100 cm2 NO l Flagged (2) ' l Percent of Samples > 1,250.0 dpm/100 cm2 0.0 l Passed (3) l l Number of Samples > 2,500.0 dpm/100 cm2 0 l Passed (4) l UCL of Mean less than or equal 5,000.0 dpm/100 cm2 YES l Passed I (3) 10% Test (4) Single Measurement Test 1 (2) See Investigation Section l l l O Page 1:TSABS:V2.10.2.a.8.19.96 Page 14 FSR_ STAT.FSL
Plant Systems Corrected Field Activity Values
-f$d@S Total Surface Activity - Beta Survey y=gs Location Code: D4200TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined value.s exceed the critical level.
Bold values exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0023 792-1 4-1 600 917.6 451.1 -463.9 T01 4-2 882.7 433.6 -5.7 4-3 913.3 448.9 956.5 B0031 793-1 1-1 15 843.3 394.2 324.1 1-2 938.9 442.0 648.1 1-3 820.4 382.8 121.5 770-1 2-1 180 759.5 355.7 977.5 2-2 787.8 369.8 -106.6 B1004 793-1 14 15 1.011.2 478.2 222.9 B1005 7-1 687.0 316.1 191.8 O Page 2:TSABS:V2.10.2.a.8.19.96 Page 15
l t _ O Plant Systems Corrected Field Activity Values - t'ds BMMM Total Surface Activity - Beta Survey hm Location Code: D4200TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the entical level. Bold values exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B1006 793-1 7-2 15 992.5 468.8 173.5 T01 B1007 73 687.0 316.1 189.6 0 B1008 312-3 31 827.9 367.2 193.8 E01 B1009 3-2 854.8 400.6 254.2 G V Page 3:TSABS:V2.10.2.a.8.19.% Page 16
Plant Systems Corrected Field Activity Values Total Surface Activity - Beta Survey -.--- Md5 Location Code: D4200TZZZZDZ Comments: Activity (net), MDA, ard CL reponed dpm/100 cm2 Urderlined values exceed the critical level. Bold values exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 Count time reponed in seconds. Medium Download # . Location ID - Coimt MDA Critical Activity Reason Code Station # Location # Time Level Code B1010 312-3 3-3 15 833.4 389.9 232.9 E01 B1011 3-4 759.5 353.0 352.3 O B1012 792 1 44 600 817.6 401.1 254.1 T01 B1013 808-1 5-1 300 565.2 275.1 332.7 O Page 4:TSABS:V2.10.2.a.8.19.96 Page 17
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Plant Systems Corrected Field Activity Values - (Q/ Total Surface Activity - Beta Survey REa, gra MS Is.ation Code: D4200TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 1,250.0 d Count time reported in seconds.pm/100 cm2 Italic values exceed 5,000.0 dpm/10 Medium Download # . Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B1014 808-1 6-1 300 523.6 254.3 432 9 T01 81015 , 9-1 502.1 243.5 282.2 O , i 4 B1016 898-1 g-2 506.5 246.1 281.8 l B1017 9-3 526.8 256.3 271.2 Page 5:TSABS:V2.10.2.a.8.19.96 Page 18
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Plant Systems Corrected Field Activity Values g Total Surface Activity - Beta Survey r a;=c_. Location Code: D4200TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # . Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B1018 792-1 81 600 769.7 377.1 287.2 T01 B1019 8-2 741.4 362.9 160.2 O B1020 8-3 685.4 335.0 217.1 l i B1021 84 657.3 320.9 273.8 O Page 6:TSABS:V2.10.2.a.8.19.96 l Page 19 i
i Plant Systems Corrected Field Activity Values
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~~Total Surface Activity - Beta Survey - - - - - -~~
~~; Location Code: D4200TZZZZDZ ! Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level.~~
Bold values exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 Count time reported in second Medium Download # Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B1022 770-1 10-1 180 806.1 379.0 180.4 T01
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1 B1023 10-2 1,047.4 499.6 230.0 0 1 i B1024 11-1 931.1 441.5 251.6 B1025 11-2 879.2 415.5 351.5 'O Page 7:TSABS:V2.10.2.a.8.19.96 Page 20
Plant Systems Corrected Field Activity Values - Total Surface Activity - Beta Survey g. M= =S $ , Location Code: D4200TZZ7ZDZ Comments: Activity (net), MDA, and CL reported dpm/IO0 cm2 Underlined values exceed the critical level. Bold values exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm3 Count time reported in seconds. Medium Download # . Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B1026 700-1 12-1 60 1,380.1 653.4 441.6 T01 B1027 12-2 1,343.3 635.0 488.1 O O Page 8:TSABS:V2.10.2.a.8.19.96 Page 21 l
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O Graph of Activity versus Location Series - fS355 Q , Total Surface Activity - Beta Survey gram Location Code: D4200TZZZZDZ Survey Reasons: T01 - Initial Final Release, E01 - Replacement Meditun Codes: B0023, B0031, B10(M, B1005, B1006, B1007, B1008, B1009, B1010, B1011, B1012, B1013, B1014, B1015, B1016, B1017, B1018, B1019, B1020, B1021, B1022, B1023, B1024, B1025, B1026, B1027 Average Guideline Value 5000.0 dpm/100 cm' 2500 2000--------- --- ----------------------------------------------------- 1500--------------------------------------------------------------------
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~~--*- Critical level - - . - MDA -- Average Guideline Value (off-scale) -.- Activity O~~
Page 9:TSABS:V2.10.2.a.8.19.96 l GRFSL7L8.FSL Page 22
f Background Correction Values
~~-EME@~~
Total Surface Activity - Beta Survey gram _ Location Code: D4200TZZZZDZ Comments: Field Background (Bkg) reported in cpm / detector area. Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0023 792-1 4-1 02101 600 TM001 114.6 0.0 T01 4-2 105.9 4-3 113.5 B0031 793-1 1-1 02202 15 280.0 1-2 352.0 1-3 264.0 770-1 2-1 02000 180 24.7 2-2 26.7 B1004 793-1 14 02202 15 412.0 2,086.0 B1005 7-1 180.0 1,793.0 0 Page 10:TSABS:V2.10.2.a.8.19.96 Page 23
r Background Correction Values - ( E d@@ Total Surface Activity - Beta Survey . - - - - - Location Code: D4200TZZZZDZ Comments: Field Background (Bkg) reported in epm / detector area. Medium Bkg reported in dpm/100 cm2 Count time reponed in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B1006 793-1 7-2 02202 15 TM001 396.0 1,629.0 T01 B1007 7-3 180.0 1,775.0 Ch V B1008 ; 312-3 3-1 284.0 1,821.0 E01 ] B1009 3-2 304.0 2,373.0 I v Page 11:TSABS:V2.10.2.a.8.19.% i Page 24 l
.m a Background Correction Values Total Surface Activity - Beta Survey g ,y_ a_- a Location Code: D4200TZZZZDZ Comments: Field Background (Bkg) reported in cpm / detector area.
Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B1010 312-3 3-3 02202 15 TM001 288.0 2,177.0 E01 B1011 3-4 236.0 3,302.0 O l s i B1012 792-1 4-4 02101 600 90.6 3,589.0 T01 i e 1 l l B1013 j 808-1 5-1 02302 300 90.6 4.334.0 l l l O Page 12:TSABS:V2.10.2.a.8.19.96 Page 25 l l l
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l l Background Correction Values 1 Total Surface Activity - Beta Survey ca,.___ . i Location Code: D4200TZZZZDZ Comments: Field Background (Bkg) reported in epm / detector area. Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Mediu:n Reason Station # Location # Type Time Sub Bkg Bkg Code B1014 808-1 6-1 02302 300 TM001 77.4 4,056.0 T01 d i l l 81015 9-1 71.0 3,840.0 O i B1016 898-1 g-2 80.8 3,834.0 1 4 B1017 9-3 87.6 3,692.0 Page 13:TSABS:V2.10.2.a.8.19.96 Page 26 i
a .m Background Correction Values Total Surface Activity - Beta Survey g gg
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Location Code: D4200TZZZZDZ Comments: Field Background (Bkg) reported in epm / detector area. Medium Bkg reported m dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B1018 792-1 8-1 02101 600 TM001 80.1 2,691.0 T01 B1019 8-2 74.2 1,495.0 B1020 8-3 63.2 2,028.0 B1021 g 58.0 2,567.0 I Page 14:TSABS:V2.10.2.a.8.19.96 Page 27 !
CJ Total Surface Activity - Beta Survey
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Location Code: D4200TZZZZDZ Comments: Field Background (Bkg) reported in cpm / detector area. Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B1022 770-1 10-1 02000 180 TM001 28.0 3.623.0 T01 i B1023 i 10-2 48.7 4,622.0 'O B1024 11-1 38.0 2.361.0 i B1C25 11-2 33.7 3,292.0 1 O Page 15:TSABS:V2.10.2.a.8.19.96 l 1 Page 28 j
.~ n Background Correction Values
~~-f$d[d5 Total Surface Activity - Beta Survey Location Code: D4200TZZZZDZ Comments: Field Background (Bkg) reported in cpm / detector area.~~
Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B1026 790-1 12-1 02302 60 TM001 108.0 4,126.0 TD1 B1027 12-2 102.0 4,566.0 9 d s l l Page 16:TSABS:V2.10.2.a.8.19.96 l Page 29 l
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~~r Summary of Emciency Values Total Surface Activity - Beta Survey g~~
~~,i.,,am Location Code: D4200TZZZZDZ Survey Reasons: T01 - Initial Final Release, E01 - Replacement Comments:~~
Detector Detector Download # Emciency Model Serial Number -Station # LMI 43-68/S PR092525 312-3 0.162 LMI 44-40B PR094981 770-1 0.121 LMI 43-94/100 PR124115 790-1 0.037 SEG SP-113-3M PR024351 792-1 0.090 LMI 43-68/S PR095535 793-1 0.158 LMI 43-94/100 PR124115 808-1 0.036 LMI 43-94/100 PR124111 898-1 0.038 O NI i A V Page 17:TSABS:V2.10.2.a.8.19.96 Page 30
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Location Code: D4200TZZZZDZ Survey Reasons: T01 - Initial Final Release, E01 - Replacement Medium Codes: B0023, B0031, B1004, B1005, B1006, B1007, B1008, B1009, B1010, B1011, B1012, B1013, B1014, B1015, B1016, B1017, B1018, B1019, B1020, B1021, B1022, B1023, B1024, B1025, B1026, B1027 Download # - Survey User ID M2350 S/N Detector Station Id S/N 312-3 DTS6208/95359 95359 PR092525 770-1 JDT2759/98642 98642 PR094981 790-1 RLN4080/117578 117578 PR124115 792-1 JPC7742/117578 117578 PR024351 793-1 RCW1152/98643 98643 PR095535 808-1 JDT2759/117578 117578 PR124115 898-1 DTS6208/98643 98643 PR124111 Program Version: V2.10.2.a.8.19.96 Report Printed At: 03:18:47 PM on 08/21/96 Total Pages: 18 Page 18:TSABS:V2.10.2.a.8.19.96 Page 31
s Statistical Summary Removable Surface Activity - Beta Survey g
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Location Code: D4200TZZZZDZ Survey Reason: T01 - Initial Final Release Medium Codes: B0020, B0023, B0031 Net dpm/100 cm2 l Upper Confidence Limit (UCL) 4.5 l Mean 2.7 l Maximum 15.5 l Minimum -5.6 l Standard Deviation 5.8 ,l-l Minimum Detectable Activity 25.8 l Critical Level 9.8 l Samples Reported 30l l Samples Prescribed 30l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 250.0 dpm/100 cm2 YES l Passed l Percent of Samples > 250.0 dpm/100 cm2 0.0 l Passed (3) l Number of Samples > 500.0 dpm/100 cm2 0 l Passed (4) UCL of Mean less than or equal 1,000.0 dpm/100 cm2 YES l Passed Number of Samples > 1,000.0 dpm/100 cm2 N/Al (3) 10% Test (4) Single Measurement Test Page 1:RSABS:V2.7.0.a.5.28.96 Page 32
I Plant Systems Corrected Field Activity Values Removable Surface Activity - Beta Survey
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Location Code: D4200TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 250.0 dpm/100 cm2 Italic values exceed 1,000.0 dpm/100 cm2 Medium RC# Location ID - MDA Critical Activity Reason Code Location # Level Code 80020 26.09838 10-1 21.5 7.6 -2.3 T01 l 26.09839 10-2 21.5 7.6 4.6 I 26.09840 11-1 21.5 7.6 -2.3 l 26.09841 11-2 21.5 7.6 4.6 26.25645 14-1 24.9 9.3 2.3 B0023 26.09897 4-1 25.8 9.8 5.3 26.09853 5-1 22.9 8.3 1.4 26.25642 5-2 24.9 9.3 2.3 26.09854 6-1 22.9 8.3 -0.9 26.25643 6-2 24.9 9.3 4.6 26.09888 7-1 22.9 8.3 15.3 26.09889 7-2 22.9 8.3 6.0 26.09890 7-3 22.9 8.3 1.4 26.09892 8-1 25.8 9.8 -5.3 26.09893 8-2 25.8 9.8 -3.0 26.09894 8-3 25.8 9.8 . 15.5 26.09895 8-4 25.8 9.8 3.9 26.09855 9-1 22.9 8.3 3.7 26.09883 12-1 22.9 8.3 10.6 26.25644 13-1 24.9 9.3 -2.3 B0031 26.09384 1-1 22.9 8.3 5.6 26.09885 1-2 22.9 8.3 13.0 26.09886 1-3 22.9 8.3 3.7 26.09887 1-4 22.9 8.3 6.0 26.09836 2-1 21.5 7.6 ,y 26.09837 2-2 21.5 7.6 4.6 26.10110 3-1 22.6 8.2 -3.0 26.10111 3-2 22.6 8.2 1.6 26.10112 3-3 22.6 8.2 -0.7 26.10113 3-4 22.6 8.2 1.6 Page 2:RSA.BS:V2.7.0.a.5.23.96 Page 33
s Graph of Activity versus Location Series - l Removable Surface Activity - Beta Survey bbb5-
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l Location Code: D4200TZZZZDZ Survey Reason: T01 - Initial Final Release l l Medium Codes: B0020, B0023, B0031 Guideline Value 1000.0 dpm/100 cm2 275 225- -------------------------------------------------------------------- l l (^
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--err 8 =.a. g s Location Code: D4200TZZZZDZ Survey Reason: T01 -Initial Final Release
\ ) Medium Codes: B0020, B0023, B0031 s Location Range Survey User ID Laboratory Serial Equipment Number 4-1 B. DANIEL LB-5100W SN5100W 8-1 to 84 B. DANIEL LB-5100W SN5100W 12-1 DETRICK LB-5100W SN5100W 1-1 to 1-4 KDE9135 LB-5100W SN5100W g 7-1 to 7-3
'2 KDE9135 LB-5100W SN5100W W LCF0451 LB-5100W SN5100W ,- 2 LCF0451 LB-5100W SN5100W 13-1 LCF0451 LB-5100W SN5100W 14-1 LCF0451 LB-5100W SN5100W 10-1 to 10-2 NEELY LB-5100W SN5100W 3-1 to 3-4 RLN4080 LB-5100W SN5100W 21 to 2-2 TRUJILLO LB-5100W SN5100W 5-1 TRUJiLLO SN5100W LB-5100W 6-1 SN5100W TRUJILLO LB-5100W 9-1 TRUJILLO SN5100W LB-5100W 11-1 to 11-2 TRUJILLO LB-5100W SN5100W Program Version: V2.7.0.a.5.28.96 R: port Printed At: 02:23:43 PM on 05/29/96 ,
~~Total Pages: 4 Page 4:RSABS:V2.7.0.a.5.28.96 Page 35~~
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Scientific Ecology Group, Inc. E y Radiological Engineering & Decommissioning Senices O Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record Contents Survey Area Survey Area ID: Survey Area Description Pages D4300 System 43, Chemical Injection System 2 Survey Unit (s) Imcation Code Survey Unit Description Pages D4300 ZZZZZ DZT01 System 43, Chemical Injection System 3-21 O l I l Prepared By: Ou 4M- / /O-/f-7I SEG Radf61of,ifal Engineer Date ) Reviewed By: e%/ / /b//7/94 SEG Project $diation Protefetion Manager D$te
~~. Approved By: ~~~
~~MNM PSCo Radiation 4!r6tection Manager~~
~~/ /4//7/96 Dat:~~
C L/ Page 1
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l l Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Services gg
~~~~~ ] Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record - Survey Area Survey Area / Package ID: D4300 Survey Area~~
~~Description:~~
~~Chemical Injection System, System #43 Survey Package~~
~~Description:~~
Chemical Injection System The Chemical Injection System, System No. 43, was used to chemically treat the Service Water System and the Circulating Water System. The Chemical Injection System was surveyed as an Unaffected System. Measurement locations were marked on maps to designate where sample measurements were collected. Survey Area Operational History: The Chemical Injection System was in operation prior to plant shutdown August 18,1989. The Chemical Injection System had no history of radioactive contamination events. Survey Area Decommissioning and Remediation Activities: O No radiological decommissioning or remediation was performed for System 43. All equipment items remain in place. Isolation and Control Measures: Level 2 Controls When appropriate, disassembled components were reassembled following survey. If reassembly was delayed or not performed, component openings were sealed with tape or other appropriate material to maintain isolation control. This system has been abandoned in place. Survey Area
~~Conclusions:~~
The results of total and removable surface activity measurements collected within this Survey Area meet the criteria for release for unrestricted use. The results of H-3 sample analysis were 2 less than the Minimum Detectable Activity of 240 dpm/100 cm , Survey Area
~~References:~~
l Initial Radiological Site Characterization Report volumes 1, 2,11. System Description (SD-43) Chemical Injection System, PI-43-(1-3) ' Discussion with PSCo and Westinghouse Team personnel l Page 2
Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Services gg
~~~ ~ ~x Fort St. Vrain Nuclear Genera'ing Station Decommissioning Project -~~
Tlelease Record - Survey Unit Location Code: D4300 ZZZZZ DZT01 Group ID Survey Area Number Surface Category Survey Unit Classification D 4300 System Internals DZ (Unaffected) Survey Reason: T01 - Initial Final Release Survey Unit
~~Description:~~
System 43, Chemical Injection Survey Design: Measurement Type No. of Measurements Description I Beta Scan N/A Scanned accessible surface at each total surface activity location. No areas of elevated activity were identified. Total Surface 33 Collected total surface activity measurements at Activity designated locations from 11 plant system components, py Smears 33 Collected smears at designated locations from 11 plant system components. Special Samples 1 Collected Tritium removable activity smear l sample at location D43FDOT021. I Survey Unit Investigations: ! Investigation No. 1 03/12/96 Elevated readings up to approximately 12,000 dpm/100 cm2 were detected during the initial survey of location #4. The elevated activity was suspected to be due to natural radioactivity because this location interfaced with the Circulating Water System (an unpurified water system) that was determined to contain natural radioactivity. . O l Page 3 '
~~. . - - . - - , - - - - - - . . - - a - - - - ,- - -_ a. -- -,. . -.1 - - - + - u.a.a.__. - - - -~~
1 I 4 a i 1 Survey Unit Investigations (continued): 3 } O~ A coupon sample (i.e., a split section of the pipe) was collected from location #4 at the area of highest elevated activity. A gamma spectroscopy analysis was performed. Only non-licensed
activity was identified during the count of the coupon sample (e.g., Th-234, Pb-212, etc.). No

licensed nuclides were detected. Specific background correction values were applied for the

measurements of location #4 by making a conservative estimate of licensed activity. The ;
~~j conservative estimate of licensed activity was determined by summing the MDAs of predominate l~~
~~licensed radionuclides (i.e., Co-60, Cs-137 and Eu-152, which contributed approximately 97% !~~
~~] of the total licensed nuclide activity identified in samples used to determine the SGLVs at FSV). 1 l f l l 4 x J 4~~
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Radiological Engineering & Decommissioning Services Q Fort St. Vrain Nuclear Generating Station Decommissioning Project Survey Location Summary n Description Location C Number 1 6 - TSA T-4101, Calgon 1247 Bulk Building 23, Survey Area 6 - RSA Storage Tank B0004 2 4-TSA T-4105, Chemical Mix Tank Building 23, Survey Area 4 - RSA B0004 1-11-3 3 Circulating Water Acid Dilution Southeast Circulating Water 4 - TSA 4 - RSA I "E "E "' ""#7 ^I## B001 4 3 - TSA 4" PVC L41625, Chlorine Building 23 Survey Area 3 - RSA Ejector Discharge Line B0004 5 M-41808, Suction Strainer for Building 1008, Acid Storage b^
~~," g Acid Pump P-4113 Pump IIouse, Survey Area~~
{')s t, B014 6 2 - TSA 1" Drain Line (drain for chlorine Building 23, Survey Area 2 - RSA evaporator and chlorinator) B0004 7 2-TSA S-41(M, Residual Chlorine Building 23, Survey Area 2 - RSA Analyzer B0004 8 2-TSA S-4201, Residual Chlorine Building 23, Survey Area 2 - RSA Analyzer B0004 9 2 - TSA T-4203, Chemical Mix Tank Building 23, Survey Area B0004
' _ 2 - RSA 10 3 - TSA T-4204, Chemical Mix Tank Building 23, Survey Ares 3 - RSA B0004 11 3 - TSA T-4106, Chemical Mix Tank Building 23, Survey Area ,
3 - RSA B0004 g , N.) l Page 6 l l
i Scientific Ecology Gmup, Inc. jgg
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Radiological Engineering & Decommissioning Sen' ices Fort St. Vrain Nuclear Generating Station Decommissioning Project Special Samples Iecation Code: D4300 ZZZZZ DZT01 Comments: H-3 activity reported in Net dpm/100 cm2 Underlined values exceed the critical level Bold values exceed 250 dpm/100 cm2 Italic values exceed 1,000 dpm/100 cm2
~~Tritium Removable Activity Sample Imcation # Type of Sample Critical Level MDA Activity 2-1 II-3 117.1 240.0 -67.3 O~~
O Page 7
p Compilation of Statistica! Summaries Total Surface Activity - Beta Survey Nd@@ Removable Surface Activity - Beta Survey -- Location Code: D4300TZZZZDZ Medium Codes: B0019, B0023, B0024, B1001, B1002, B1003, B9999 Comments: Total Surface Activity (TSA) reported in Net dpm/100 cm2 Removable Surface Activity (RSA) reported in Net dpm/100 cm2 TSA RSA O -(v, Upper Confidence Limit (UCL) 182.7 8.9 Mean 93.0 4.3 Maximum 838.1 83.8 Minimum -571.4 -5.3 Standard Deviation 306.0 16.0 Minimum Detectable Activity 1,181.5 25.8 Critical Level 556.6 9.8 Samples Reported 33 33 Samples Prescribed 33 33 01 C/ l Page 1: ERGS:V2.11.1.a.9.6.96 Page 8
Statistical Summary Total Surface Activity - Beta Survey gg 7.,:,a._ a. 1 tion Code: D4300TZZZZDZ Survey Reason: T01 - Initial Final Release Aledium Codes: B0019, B0023, B0024, B1001, B1002, B1003, B9999 Net dpm/100 cm2 l Upper Confidence Limit (UCL) 182.7 l l Mean 93.0 l l Maximum 838.1 l l Minimum -571.4 l l Standard Deviation 306.0 l l Minimum Detectable Activity 1,181.5 l l Critical Level 556.6 l l Samples Reported 33l l Sampies Prescribed 33l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 1,250.0 dpm/100 cm2 YES l Passed l Percent of Samples > 1,250.0 dpm/100 cm2 0.0 l Passed (3) l Number of Samples > 2,500.0 dpm/100 cm2 0 l Passed (4) l UCL of Mean less than or equal 5,000.0 dpm/100 cm2 YES l Passed (3) 10% Test (4) Single Measurement Test O 1 Page 1:TSABS:V2.11.1.a.9.6.96 Page 9 l - - - - - _o
Plant Systems Corrected Field Activity Values - Total Surface Activity - Beta Survey :/,.=Sbbb _
~~,_ 2 Location Code: D4300TZZZZDZ Comments: Activity (net), MDA, and CL reported dpni/100 cm'.~~
Underlined values exceed the critical level. Bold values exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 Count time reported in seconds. Medium Downicad # Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0019 1054-1 1-1 15 709.2 332.9 224.0 T01 1-2 725.7 341.1 320.0 ; 1-3 772.8 364.7 -128.0 1-4 729.7 343.2 224.0 1-5 784.1 370.4 -32.0 1-6 765.1 360.9 -112.0 2-1 817.0 386.8 -160.0 : 2-2 765.1 360.9 160.0 2-3 761.3 359.0 -256.0 2-4 769.0 362.8 -272.0 1043-1 0-1 892.1 418.8 301.9 9-2 854.6 400.0 60.4 (O # 10-1 10-2 886.8 907.6 416.1 426.6 281.8 100.6 10-3 897.3 421.4 20.1 11-1 933.0 439.2 161.0 11-2 990.9 468.2 -161.0 11-3 976.8 461.1 40.3 B0023 ' 1102-1 6-1 30 889.3 404.8 294.1 6-2 977.1 448.7 -29.4 1107-1 7-1 1.181.5 547.7 -571.4 7-2 1.120.0 517.0 -222.2 8-1 1.054.6 484.3 412.7 8-2 1,151.2 532.6 95.2 j B0024 1148-1 3-1 15 675.4 317.1 838.1 3-2 732.3 345.5 0.0 3-3 612.9 285.8 335.2 3-4 634.5 296.6 624.8 ( G l l Page 2:TSABS:V2.11.1.a.9.6.96 l Page 10 l
Plant Systems Corrected Field Activity Values
~~-f5d@S Total Surface Activity - Beta Survey g_ a,= _~~
Location Code: D4300TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Iloid value :xceed 1.250 0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B1001 1105-1 41 180 1,136.9 556.6 512.8 T01 B1002 4-2 1,129.4 552.9 537.5 O 4-3 1,008.3 492.3 103.9 l l l l l B9999 1123-1 5-1 1,120.6 537.0 378.5 ' 5-2 1,084.2 518.8 258.1 1 1 \ l O Page 3:TSABS:V2.11.1.a.9.6.96 Page 11
Graph of Activity versus Location Series O- Total Surface Activity - Beta Survey
~~-d@S g=ga Location Code: D4300TZZZZDZ Survey Reason: T01 - Initial Final Release l~~
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Background Correction Values Total Surface Activity - Beta Survey
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Location Code: D4300TZZZZDZ Comments: Field Background (Bkg) reponed in cpm / detector area. Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0019 1054-1 1-1 02200 15 TM001 320.0 0.0 T01 1-2 336.0 13 384.0 1-4 340.0 1-5 396.0 1-6 376.0 2-1 432.0 2-2 376.0 2-3 372.0 2-4 380.0 1043-1 9-1 02202 320.0 9-2 292.0 10-1 316.0 10-2 332.0 10-3 324.0 11-1 352.0 11-2 400.0 11-3 388.0 B0023 1102-1 6-1 02301 30 70.0 6-2 86.0 1107-1 7-1 02300 110.0 7-2 98.0 8-1 86.0 8-2 104.0 B0024 1148-1 3-1 02201 15 320.0 3-2 380.0 3-3 260.0 3-4 280.0 0 Page 5:TSABS:V2.11.1.a.9.6.96 Page 13
O O Background Correction Values - Total Surface Activity - Beta Survey Sbbh
~~, yea,._ -R Location Code: D4300TZZZZDZ Comments: Field Background (Bkg) reported in epm / detector area.~~
Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B1001 1105-1 4-1 02100 180 TM001 249.7 10,677.0 T01 B1002 4-2 246.3 11,203.0 81003 4-3 195.3 2,169.0 4 B9999 1123-1 5-1 02000 60.0 0.0 5-2 56.0 Page 6:TSABS:V2.11.1.a.9.6.96 Page 14 i
Summary of Efficiency Values Total Surface Activity - Beta Survey g=_-; _ Location Code: D4300TZZZZDZ Survey Reason: T01 - Initial Final Release Comments: Detector Detector Download # Efficiency Model Serial Number -Station # LMI 43-68/S PR095083 1043-1 0.159 LMI 43-68B PR095083 1054-1 0.200 LMI 43-94P100 PR124110 1102-1 0.068 SEG SP-175-3M PR024349 1105-1 0.082 LMI 43-94/075 PR124110 1107-1 0.070 LMI 44-40B PR094981 1123-1 0.125 LMI 43-106B PR128913 1148-1 0.210 0 0 Page 7:TSABS:V2.11.1.a.9.6.96 Page 15
i l l Survey Detection Equipment Used
)
Total Surface Activity - Beta Survey ; y d M.-. . Location Code: D4300TZZZZDZ Survey Reason: T01 - Initial Final Release Medium Codes: B0019, B0023, B0024, B1001, B1002, B1003, B9999 Download # - Survey User ID M2350 S/N Detector Station Id S/N 1043-1 AOK2982/98620 98620 PR095083 1054-1 AOK2982/98620 98620 PR095083 1102-1 DLB6373/98643 98643 PR124110
/
1105-1 LCF0451/126192 126192 PR024349 1107-1 DLB6373/98643 98643 PR124110 1123-1 DTS6208/98642 98642 PR094981 1148-1 LCF0451/126198 126198 PR128913 Program Version: V2.11.1.a.9.6.96 O Report Printed At: 09:45:43 AM on 09/11/96 U Total Pages: 8 Page 8:TSABS:V2.11.1.a.9.6.96 Page 16 l
i 1
)
I Statistical Summary Removable Surface Activity - Beta Survey g,._ Location Code: D4300TZZZZDZ , l Survey Reason: T01 - Initial Final Release Medium Codes: B0019, B0023, B0024, B9999 Net dpm/100 cm2 l Upper Confidence Limit (UCL) 8.9 l l Mcan 4.3 l l Maximum 83.8 l l Minimum -5.3 l l Standard Deviation 16.0 l ' l Minimum Detectable Activity 25.8 l l Critical Level 9.8 l l Samples Reported 33 l l Samples Prescribed 33l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 250.0 dpm/100 cm2 YES l Passed l Percent of Samples > 250.0 dpm/100 cm2 0.0 l Passed (3) l Number of Samples > 500.0 dpm/100 cm2 0 l Passed (4) l UCL of Mean less than or equal 1,000.0 dpm/100 cm2 YES l Passed (3) 10% Test (4) Single Measurement Test O Page 1:RSABS:V2.11.1.a.9.6.96 Page 17 u
Plant Systems Corrected Field Activity Values - Removable Surface Activity - Beta Survey r.== _ Location Code: D4300TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 250.0 dpm/100 cm2 Italic values exceed 1,000.0 dpm/100 cm2 Medium RC # Location ID - MDA Critical Activity Reason Code Location # Level Code 80019 26.14750 1-1 23.6 8.7 0.9 T01 26.14751 1-2 23.6 8.7 5.6 26.14752 1-3 23.6 8.7 -3.7 26.14753 1-4 23.6 8.7 7.9 26.14754 1-5 23.6 8.7 0.9 26.14755 1-6 23.6 8.7 -1.4 26.14756 2-1 23.6 8.7 -1.4 26.14757 2-2 23.6 8.7 -1.4 26.14758 2-3 23.6 8.7 3.2 26.14759 2-4 23.6 8.7 0.9 26.14748 9-1 23.6 8.7 3.2
,O 26.14749 9-2 23.6 8.7 0.9 Q 26.14745 26.14746 10-1 10-2 23.6 23.6 8.7 8.7 -3.7 0.9 26.14747 10-3 23.6 8.7 3.2 26.14760 11 1 23.6 8.7 -1.4 26.14761 11-2 23.6 8.7 0.9 26.14762 11-3 23.6 8.7 0.9 B0023 26.16671 41 20.7 7.2 37.5 26.16672 42 20.7 7.2 9.7 26.16673 43 20.7 7.2 83.8 26.16249 6-1 20.7 7.2 2.8 26.16250 6-2 20.7 7.2 -1.9 26.16629 71 20.7 7.2 -1.9 26.16630 7-2 20.7 7.2 2.8 26.16631 8-1 20.7 7.2 5.1 26.16632 8-2 20.7 7.2 0.5 B0024 26.17663 3-1 25.8 9.8 -3.0 26.17664 3-2 25.8 9.8 -0.7 26.17665 3-3 25.8 9.8 -0.7 26.17666 3-4 25.8 9.8 -5.3 b
L) i' Page 2:RSABS:V2.11,l.a.9.6.96 Page 18 i
Plant Systems Corrected Field Activity Values m Removable Surface Activity - Beta Survey _11338J@@ Location Code: D4300TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 250.0 dpm/100 cm2 Italic values exceed 1,000.0 dpm/100 cm2 Medium RC # Location ID - MDA Crit'. cal Activity Reason Code Location # Level Code B9999 26.16864 5-1 21.5 7.6 -2.3 T01 26.16865 5-2 21.5 7.6 -2.3 A i l 1 1 Page 3:RSABS:V2.11.1.a.9.6.96 Page 19
1 1 Graph of Activity versus Location Series Removable Surface Activity - Beta Survey
~~-CbW g =-d j i~~
Location Code: D4300TZZZZDZ .! 1 ?. Survey Reason: T01 - Initial Final Release ' 1 Medium Codes: B0019, B0023, B0024, B9999 ' 1 Guideline Value 1000.0 dpm/100 cm3 275 1 1 l 225 ------------ ------------------------------------------------------- 175- ----- -------------------------------------------------------------- M b 8 m j125 ----- -------- -------- --- ------- -------------------- ------- -- c6 f t ! Z I 75f-----------------------------H---------------------------------- f I 25- -. m . .--. .. % # .- =- - - g ; - - - - - - - -- - - y .r .-- - - . mm - s_. - -
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~~i1 to 1-s ; h.t ,, 2a 3-1 l 54 l !4-1 43 ; L2 { 42 (, 7 2 l s-2 S2 10-2 4,151, ita Location Series~~
~~-- Critical Level -*- MDA Guideline Value (off-scale) -.- Activity O~~
Page 4:RSABS:V2.I1.1.a.9.6.96 Page 20
l Laboratory Equipment Used Removable Surface Activity - Beta Survey - 7.=,_-= h Location Code: D4300TZZZZD7. Survey Reason: T01 - Initial Final Release Medium Codes: B0019, B0023, B0024, B9999 Survey User ID Laboratory Serial Location Range Number Equipment BJB1396 LB-5100W SN5100W 1-1 2-1 BJB1396 LB-5100W SN5100W LB-5100W SN5100W 9-1 10-1 5-1 BJB1396 BJB1396 DTS6208 LB-5100W LB-5100W SN5100W SN5100W g 3-1 LCF0451 LB-5100W SN5100W 4-1 LCF0451 LB-5100W SN5100W 8-1 VMB1245 LB-5100W SN5100W 6-1 VMB6153 LB-5100W SN5100W 7-1 VMB6153 LB-5100W SN5100W LB-5100W SN5100W 8-2 VMB6153 11-1 'BJB1396 LB-5100W SN5100W Program Verrion: V2.11.1.a.9.6.96 Report Printed At: 09:49:19 AM on 09/11/96 l Total Pages: 5 I Page 5:RSABS:V2.11.1.a.9.6.96 Page 21
Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Services
~gg -~~ \ , Fort St. Vrain Nuclear Generating Station Decommissioning Project i Release Record Contents Survey Area Survey Area ID: Survey Area Description Pages D4400 Domestic Water System, System #44 2-3 i Survey Unit (s)
Location Code Survey Unit Description Pages D4400 TZZZZ DZR)1

D4400 TZZZZ DZE01 Domestic Water System 4-28 D4400 TZZZZ DZG02 E
~~Prepared By: M ~ / 104E~~
SEG Sa'di616kical Engineer Date Reviewed By

/ '#
5 SEG Prefect Radiation Protection Manager Date Approved By: , _ w 4.s M z does- / a/n As A PSCo Radiation Protection Manager Date V Page 1
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Scientific Ecology Group,Inc. Radiological Engineering & Decommissioning Services 1gg
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Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record - Survey Area Survey Area: D4400 1 , i Survey Area
~~Description:~~
Domestic Water System, System #44 Survey Area Packages: This Survey Area was segregated and surveyed in accordance with the following survey packages. I D4400 Domestic Water System D4402 Sanitary Sewage The Domestic Water System provided a source of relatively pure water for domestic usage. (drinking fountains, eye wash fountains, toilets, showers, cooking, etc.), for cycle make-up and for laboratory use. His survey area was broken into two survey units: Domestic Water System (package D4400) which consisted of most of the domestic water system supply and drains including storage tank, drinking fountains, toilets, etc., and Sanitary Sewage (package D4402) which consisted of select sink drains and the downstream sewer where elevated activity was found during the initial final survey of D4400. 'O 1 The Domestic Water System (Survey Package D4400) was surveyed as an Unaffected System and the Sanitary Sewage (Survey Package D4402) was surveyed as an Affected System. Measurement locations were marked on maps to designate where sample measurements were collected. Survey Area Operational History: The Domestic Wath utem was in operation prior to plant shutdown August 18,1989. The Domestic Water Syste.a will be used for repower operations. Prior to final survey, the Domestic Water System had no known history of radioactive contamination events. However, during final survey, elevated readings were found in a sink trap used by the general labor force during decommissioning. Therefore, the affected sink drain, similar sink drains and down:;tream sewer were reclassified as an Affected portion of Survey Area D4400 and surveyed as an affected survey unit with package D4402. Survey Area Decommissioning and Remediation Activities: The affected sink drain trap containing elevated activity was removed for disposal as radioactive waste. i O Page 2
1 Isolation and Control Measures: 1.evel 2 Controls When appropriate, disassembled components were reassembled following survey. If reassembly O was delayed or not performed, component openings were scaled with tape or other appropriate material to maintain isolation control. Sinks and toilets were returned to service following survey. This system remains in service. l Survey Area
~~Conclusions:~~
I The results of total and removable surface activity measurements collected within this survey area meet the criteria for release for unrestricted use. The level of removable H-3/Fe-55 measured was well below the administrative action level. Survey Area
~~References:~~
Initial Radiological Site Characterization Report Volumes 1,2,11. System Description (SD-44) Domestic Water System 90-PF-44, 90-PI-44 Discussion with PSCO and Westinghouse Team personnel. O O 1 Page 3
Scientific Ecology Group, Inc. gg
~~% a :;.:.al Engineering & Decommissioning Services Fort St. Vrain Nuclear Generating Station Decommissioning Project -~~
Release Record - Survey Unit Location Code: D4400 TZZZZ DZ Group ID Sur ace Categen Survey Area Number Survey Unit Classification D 4400 System Internals (Unaffected) Survey Reason: T01 - Initial Final Release E01 - Replacement G02 - Investigation Survey Unit
~~Description:~~
Domestic Water System Survey Design: Measurement Type No. of Measurements Description ( Beta Scan N/A Scanned accessible surface at each total surface activity location. No areas of elevated activity were identified. Total Surface 41 Collected total surface activity measurements at Activity designated locations from 22 plant system components, py Smears 37 Collected smears at designated locations from 22 plant system components. Special Samples 4 Collected one sediment, one H-3/Fe-55 removable activity, and one H-3 removable activity sample from survey location 1. Also collected a combined sediment sample from the 6 drain traps. O Page 4
Survey Unit Investigations: Investigation #1: g Co-60 and Cs-137 were identified in a combined sediment sample from six sink drain traps (i.e., survey locations 17,18,19,20,21, and 22). Only a qualitative analysis was performed because there was insufficient sample to quantify by an existing geometry. Each of the six drain traps were surveyed to determine if they were contaminated. Prior to surveying the location 17 trap, rags were passed through the trap to remove excess debris to allow survey inside the trap. Five of the six traps did not indicate elevated readings. One trap (survey location 17, MK trailer men's rest room second sink from the north) indicated an elevated reading of approximately 15,000 dpm, which corresponds to an area corrected 2 result of about 200,000 dpm/100 cm' due to the detection area of 7.6 cm for the GM detector assembly used (download 1039-1). However, the total activity pre:ent in the trap is likely to be closer to 15,000 dpm as the elevated area appeared to be a localized spot. The rags used to clean location 17 were counted for isotopic identification and mdicated the presence of Co-60 and Cs-137. An Investigation Survey was performed on location 17. The Investigation Survey results did not indicate any elevated activity within survey location
17. The MDA values for survey locations 17-1 and 17-2 were 1,858 and 1,910 dpm/100 cm2, respectively. Therefore, these MDA values exceeded the target 1,250 dpm/100 cm2 for an unaffected system but were below the affected system target MDA (i.e.,3,000 dpm/100 cm2). These subject MDA values were inherent to the low efficiency and small detection area associated with the SN-050-6K detector array. Survey locations 17-1 and 17-2 were surveyed using a SN-050-6K detector array using a thirty minute count time. However, no activity was detected at the subject locations since the respective total surface activity results of 808 and 45 dpm/100 cm' were both well below the critical level. As a conservative approach, the suspect portion (i.e. previously identified as contaminated) of the sink trap at survey location 17 was removed and disposed of as radioactive waste. For the remaining portions of location 17, no contamination was detected. Because the subject rest room trailer was subsequently removed from the site, survey location 17 was no longer considered a portion of the Domestic Water System (System 44).
Because elevated acivity was previously identified in the sink trap, a portion of D4400 was reclassified as Affected and surveyed with package D4402. The reclassified portion of D4400 included the affected sink trap line, other sink traps and drains located in the MK trailer men's rest room and all downstream piping associated with these drains. Additionally, other similar sink traps and drains (i.e., sinks most likely to be used by general labor work force) were added for survey in D4402. The sewage treatment facility and settling ponds were also sampled in D4402 to ensure significant quantities of radioactivity did not enter the sewage plant. Additional information concerning D4402 is provided it its corresponding package. The Initial and Investigation Survey measurement results for location 17 in D4400 were deleted from the database (i.e. the contaminated trap was disposed of as radioactive waste and the non-contaminated portions were removed from site). All other survey locations and g measurements in D4400 did not indicate elevated readings. No further actions required. W Page 5
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l t Survey Unit Investigations (Continued): i Investigation #2:: l The net total surface activity values for locations 11-16 averaged -977 dpm/100 crr.2 l (Download reports 1009-1,1036-1 and 1038). Since these locations were mainly ceramic l sinks and toilets, a material background correction for glazed porcelain was applied. ;
; According to TBD-206, the background correction for glazed porcelain was 1877 dpm/100 l I - cm2 . The TBD-206 study was performed using a LMI 43-68 detector whereas the detector !
) used to survey locations 11-16 was a LMI 44-40. . i ! l The measurement results of the data set were reviewed. Of the 12 measurements collected at l
~
~~locations 11 - 16, only one reading was a positive value. An evaluation of the survey i~~
~~locations determined that survey location 15 had a plastic sink (i.e.15-2) and location 16 had an enamel coated steel sink (i.e.16-1). According to TBD-206, plastic and metal nave no a~~
material background subtract value. These two survey locations (i.e.15-2 and 16-1) were j , reclassified as generic material and their recalculated activities were 269 and 811 dpm/100 ! 1 cm2, respectively. i l The designated locations were resurveyed using a 43-68/43-106. After the B0034 Medium ] Background (i.e.1877 dpm/100 cm 2) was subtracted, the total surface activity results ranged ; j from -987 to 836 dpm/100 cm .2 The Investigation Survey results yielded an average of-16 } j dpm/100 cm2 , which is consistent with expected results. Therefore, the Investiption Survey l ! data will be used for reporting purposes. The Initial Final Survey results were considered as l suspect data and were deleted from the database. l The investiption total surface activity result taken at survey location 16 indicated a measured [ j MDA of 1,406 dpm/100 cm 2. The subject MDA value is in excess of the target 1,250 l i dpm/100 cm2 MDA value for unaffected systems. A Replacement Survey was performed on I survey location 16 to alleviate the unacceptable MDA value (See Investigation # 6). ! i I Investigation #3: i The combined tritium / iron-55 removable surface activity measurenaent for location 1, T- ! 2 l 4401, domestic water storage tank, was 254 dpm/100 cm . All total and removable surface , i activity measurements taken in the tank were below MDA. Although below the individual ! l measurement action level (i.e.,50% of 1000 dpm/100 cm 2), an investigation was performed :
~~since the result was greater than 25% of the SGLV. (25% was the action level associated~~
]
1 with a set of measurements that requires investigation when exceeded by > 10% of all ] measurements - in this case only one measurement was taken). . 1 J 1 An investiption was performed by collecting a liquid tritium sampic from location 1. The i subject sample was analyzed by radiochemistry to confirm if tritium was present in the
~~domestic water storage tank. The results of the investiption indicated that the sample j~~
~ activity was below MDA. Since the initial sample collected was a removable tritium / iron-55 sample, an additional investigation was performed to collect a backup removable tritium / iron- , j surface activity sample. See Investigation #5. 1 Page 6 ; j
Survey Unit Investigations (Continued): Investigation #4: The measured MDA values associated with Survey Locations 2 and 5 were 1,332 and 1,341 dpm/100 cm2, respectively (downloads 1138-3 and 1139-3). These MDA values were greater than the target MDA of 1,250 dpm/100 cm2 for an unaffected system. Survey location 2 was the 1.5" line to the domestic water emergency shower supply and survey location 5 was the 3/4" inlet line to the reactor exhaust filter drains seal tank. The problem was attributed to insufficient count time. Therefore, a Replacement Survey was performed l using a longer survey count time. The Replacement Survey total surface activity results for survey locations 2 and 5 yielded acceptable MDA values (i.e. s 1,250 dpm/100 cm2 ). The longer count times alleviated the unacceptable MDA situation. The initial Final Survey (i.e., T01) total surface activity i measurements for survey locations 2 and 5 were considered as suspect data and were not i used for reporting purposes. Therefore, the initial measurements were deleted from the data i base and replaced with the subsequent Replacement Survey (i.e., E01) results. Investigation #5: i The removable tritium / iron-55 surface activity measurement for survey location 1 (i.e. T-4401, domestic water storage tank) was 254 dpm/100 cm2 . Since the domestic water storage tank was back in service a liquid tritium sample was collected, as part of a previous Investigation Survey (i.e. See Investigation # 3). The subject aqueous sample was g subsequently analyzed by radiochemistry and yielded a sample activity that was below the MDA for tritium. An evaluation of the total and removable surface activity measurements taken from survey location #1 indicated that all measurements were below the MDA. A Replacement Survey was performed in which a removable tritium / iron-55 smear was collected from below the normal water level of the domestic water storage tank. The backup removable 'H/"Fe smear was collected. Analysis for removable 'H/"Fe was not possible due to the high quench caused by the corrosion residue on the interior tank walls. However, the subject smear sample was subsequently distilled and analyzed for removable
~~'H. The analysis results for removable 'H was less than MDA, which supported the results obtained from the liquid sample.~~
O Page 7 _ . _ . _ _ _ . . _ _ _ _ . _ . _ _ _ _ _ _ . _ _ _ . . _ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ ___________ m 1
i Survey Unit Investigations (Continued): 3 O Investigation #6 The net total surface activity values for Survey Locations 11 through 16 yielded an average !
-977 dpm/100 cm2 . These locations were surveyed with a 44-40 detector. The B0034 (i.e. i glazed porcelain) Material Background correction was applied to the collected data. To be consistent with TBD-206, an Investigation Survey consisting of Survey locations 11 through 16 was performed utilizing a 43-68/43-106 detector (See Investigation # 4). The subject l Investigation Survey net total surface activity measurements produced an average of -16 :
dpm/100 cm2 l The Investigation Survey of Survey Location 16-2 indicated that the measured MDA was t 1,406 dpm/100 cm2 (download 780-3), which exceeded the target MDA value of 1,250 dpm/100 cm2 for an unaffected system. Survey Location 16-2 was the southeast toilet in the l' Visitor's Center, women's rest room. The problem was attributed to insufficient count time. Therefore, a Replacement Survey was performed for location 16-2 using a longer count time. ; The Replacement Survey total surface activity result for Survey Locations 16-2 yielded an 3 acceptable MDA value (i.e., s 1,250 dpm/100 cm2 ). The longer count time alleviated the i unacceptable MDA situation. The initial Final Survey (i.e. T01) total surface activity I measurement for Survey Locations 16-2 was considered as suspect data and was not used for reperting purposes. Therefore, the initial measurement was deleted from the data base and replaced with the subsequent Replacement Survey (i.e. E01) result. O Page 8 l
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~~Scientific Ecology Group,Inc. Radiological Engineering & Decommissioning Services gg~~
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Fort St. Vrain Nuclear Generating Station Decommissioning Project Survey Location Summary u ts Description Location Number 6 - TSA T-4401, Domestic Water Turbine Building, Level 13 6 - RSA Storage Tank 1 1 - H-3/Fe-55 1 - H-3 1 - Sediment 4 - TSA 1.5" Line L44211-D41, Building 23 (Chemical 2 2 - RSA Domestic water Emergency Building), loading area Shower Supply 3 - TSA 3" Line L42113, Continuous Turbine Building Level 5, 3 3 - RSA with Connect Spool to Service northwest corner (under stairs) Water ] l 1 - TSA 2" Line L42113, Temporary Turbine Building Level 5, NW 4
~~,O I - RSA Connect to Condenser Maintenance Shop j~~
V i 1 - TSA 3/4" Line L44129, Rx Exhaust Turbine Building Level 8 5 1 - RSA Filter Drains Water Seal Tank Inlet 1 - TSA M4402, backflow preventer Tbrbine Building Level 5, l 6
1 - RSA northwest corner (under stairs) 3 - TSA 1,5" Line L4410-D25, Reactor Reactor Building, Level 5, 7 1 - RSA Building plumbing water north , supply 1 - TSA Eyewash sink Acid unloading station, 8 1 - RSA Turbine Building Level 5, i southeast corner i 2 - TSA Toilet and Sink Turbine Building, Level 6, 9 2 - RSA west side, women's rest room 1 - TSA Eyewash sink Building 23 (Chemical 10 1 - RSA Treatment), west of loading area 2 - TSA Toilet and Sink Building 4 (Technical j g i! 2 - RSA Support), Level 2, women's ; l rest room
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Page 10 l l
l l on , g Description location Number 2 - TSA Toilet and Hand Sink Search and Identification 12 2 - RSA Building 2 - TSA Toilet and Sink Building 103, women's rest 33 2 - RSA room, southeast corner 2 - TSA Toilet and Sink Building 102, contract office 14 2 - RSA 2 - TSA Toilet and Sink Building 106, southeast rest 15 2 - RSA room 2 - TSA West toilet and west sink Visitor's Center, women's rest 16 2 - RSA room, southeast end N/A Sink Drain Trap Turbine Building, level 7, MK trailer men's rest room, north 17 sink. Survey location # 17 was disposed of as radioactive waste. Associated measurements deleted. 1 - TSA Sink Drain Trap Turbine Building, Level 7, 18 1 - RSA MK trailer men's rest room, sink 3 (3rd from north) ,
~~- \~~
l 1 - TSA Sink Drain Trap Turbine Building, Level 7, 19 1 - RSA MK trailer women's rest room 1 - TSA Sink Drain Trap Turbine Building, Level 6, 20 1 - RSA northwest men's rest room, south sink 1 - TSA Sink Drain Trap Building 1019, women's rest 21 1 - RSA room, east sink 1 - TSA Sink Drain Trap Building 109, men's rest room 22 1 - RSA i 1 - TSA Sink Drain Trap Turbine Building, Level 7, 23 1 - RSA MK trailer men's rest room, south sink O Page 11
l l Scientific Ecology Group, Inc. RadiologicalEngineering & Decommissioning Services gg
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Fort St. Vrain Nuclear Generating Station Decommissioning Project Special Samples Location Code: D4400 TZZZZ DZT01 Comments: H-3 & Fe-55 activity reported in Net dpm/100 cm2 Aqueous tritium sample reported in uCi/ml
~~. Sediment activity reported in pCi/g :~~
Underlined values exceed the critical level Bold values exceed 250 dpm/100 cm2 Italic values exceed 1,000 dpm/100 cm2 i Tritium and Iron-55 Removable Activity Samples l 1 l Imcation Type of Sample Critical IAvel MDA Activity Number 1-1 H-3 & Fe-55 85.8 175.0 25L2 l Aqueous Tritium Sample
\ Imcation Type of Sample Critical level MDA Activity Number 1-1 H-3 3.09E-07 6.32E-07 4.44E-08 Tritium Removable Activity Sample d
location Type of Sample Critical Level MDA Activity Number 1-1 H 109.4 223.2 -85.7 I l l l Page 12
I Special Samples Continued Sediment Samples location Licensed Critical level MDA Activity Number Nuclides Identified 1-1 None 3.77E-02m 8.13E-02m N/A 17, 18, 19, 20, Co-60 (2) (2) (2) 21, and 22 Cs-137 (1) Critical Level and MDA reported for Co-60 (2) Qualitative result only due to insufficient sample to count with existing geometry. O l l 1 O Page 13
t h Compilation of Statistical Summaries ( Total Surface Activity - Beta Survey $@@ _ - :==.%.=- Removable Surface Activity - Beta Survey Location Code: D4400TZZZZDZ Medium Codes: B0019, B0023, B0031, B0034, BMC01
~~; Comments: Total Surface Activity (TSA) reported in Net dpm/100 cm2 Removable Surface Activity (RSA) reported in Net dpm/100 cm2 1~~
l TSA RSA ~ Upper Confidence Limit (UCL) 46.4 3.8 Mean -54.9 1.9 Maximum 835.6 34.7 Minimum -986.9 -7.6 Standard Deviation 385.3 7.0 ! I Minimum Detectable Activity 1,236.5 25.8 Critical Level 589.6 9.8 Samples Reported 41 37 l ; I Sainples Prescribed 41 37 4 I i r" l k_)/ Page 1: ERGS:V2.15.1.a.10.1.% Page 14
Statistical Summary Total Surface Activity - Beta Suivey g g=,_g Location Code: D4400TZZZZDZ Survey Reasons: E01 - Replacement, G02 - Investigation, T01 - Initial Final Release Medium Codes: B0019, B0023, B0031, B0034, BMC01 Net dpm/100 cm2 l Upper Confidence Limit (UCL) 46.4 l l Mean -54.9l l Maximum 835.6 l l Minimum -986.9 l l Standard Deviation 385.3 l l Minimum Detectable Activity 1,236.5 l l Critical Level 589.6 l l Samples Reported 41 l l Samples Prescribed 41 l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 1,250.0 dpm/100 cm2 YES l Passed l Percent of Samples > 1,250.0 dpm/100 cm2 0.0 l Passed (3) l Number of Samples > 2,500.0 dpm/100 cm2 0 l Passed (4) l UCL of Mean less than or equal 5,000.0 dpm/100 cm2 YES l Passed (3) 10% Test (4) Single Measurement Test j 1 O Page 1:TSABS:V2.15.1.a.10.1.96 Page 15 l FSR. STAT FSL j
r i p Plant Systems Corrected Field Activity Values i' Total Surface Activity - Beta Survey
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t Location Code: D4400TZZZZDZ Coruments: Activity (net), MDA, and CL reponed dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # . Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0019 1060-1 1-1 15 583.9 271.7 -15.0 T01 1-2 614.2 286.9 89.7 1-3 588.3 273.9 74.8 1-4 630.9 295.2 149.5 1-5 662.8 311.1 -358.9 l 1-6 601.4 280.5 0.0 i i B0023 1889-3 2-1 120 858.2 404.9 -35.7 E01 2-2 786.9 369.2 35.7 t 2-3 796.2 373.9 35.7 2-4 891.6 421.6 -589.3 1096-1 3-1 240 887.0 432.2 -200.0 T01 3-2 869.4 423.4 -225.0 3-3 817.2 397.3 -433.3 1053-1 4-1 120 1,111.0 544.4 -663.9 1258-1 5-1 830.4 390.1 -222.2 E01 1183-1 7-1 60 1,058.5 493.6 210.5 T01 7-2 1.073.5 501.1 -210.5 7-3 1,066.0 497.4 78.9 1031-1 18-1 1,046.0 488.3 -538.5 19-1 1.031.3 480.9 -51.3 20-1 1,188.6 559.6 25.6 1037-1 21-1 1,110.3 519.5 -289.5 1094-1 22-1 1,123.1 526.8 -51.3 l 1031 1 23-1 1.008.9 469.7 153.8 B0031 965-1 6-1 180 692.0 322.7 -120.4 980-1 8-1 1,012.5 481.5 0.0 1009-1 10-1 1,057.2 506.2 463.2 Page 2:TSABS:V2.15.1.a.10.1.% Page 16
i i l Plant Systems Corrected Field Activity Values :
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Total Surface Activity - Beta Survey r.cm,,,,_- , 4 Location Code: D4400TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # . Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0034 994-1 9-1 180 1,195.3 575.4 -5.5 T01 0-2 1,138.1 546.8 -333.9 780-3 11-1 15 1,137.6 540.1 -520.7 G02 11-2 1,236.5 589.6 242.2 12-1 1,063.0 502.8 -393.6 12-2 1,215.7 579.2 835.6 13-1 1,096.3 519.4 -986.9 13-2 1,119.4 531.0 475.3 14-1 1,013.4 478.0 -520.7 14-2 1,155.4 549.0 157.4 15-1 1,228.3 585.4 51.5 2025-3 16-2 60 749.3 367.4 725.7 E01 BMC01 1038-1 15-2 180 996.5 476.8 268.8 T01 1009-1 16-1 993.8 474.5 810 6 O Page 3:TSABS:V2.15.1.a.10.1.96 Page 17 n.-....
1 l 1 O Graph of Activity versus Location Series Total Surface Activity - Beta Survey gg2=
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Location Code: D4400TZZZZDZ Survey Reasons: E01 - Replacement, G02 - Investigation, T01 - Initial Final Release l Medium Codes: B0019. B0023, B0031, B0034, BMC01 Average Guideline Value 5000.0 dpm/100 cm2 2500 2000-------- -- -- --------------- -- ------------------------ --------- 1500- ------- -- ----------------------------------------- ------- ------
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-- Critical level -*- MDA -- Average Guideline Value (off-scale) -.- Activity Page 4:TSABS:V2.15.1.a.10.1.96 GRFSL7L8 FSL Page 18
Background Correction Values jM i.E..m,fd 1 Total Surface Activity - Beta Survey ,:;,- Location Code: D4400TZZZZDZ Comments: Field Background (Bkg) reported in epm / detector area. Medium Bkg reponed in dpm/100 cm2 Count time reponed in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0019 1060-1 1-1 02201 15 TM001 244.0 0.0 T01 1-2 272.0 1-3 248.0 1-4 288.0 1-5 320.0 1-6 260.0 80023 1889-3 2-1 02302 120 47.5 E01 2-2 39.5 2-3 40.5 2-4 51.5 1096-1 3-1 02311 240 124.2 T01 3-2 119.3 3-3 105.0 1053-1 4-1 02310 120 TS001 407.5 1258-1 5-1 02300 TM001 41.0 E01 1183-1 7-1 02302 60 65.0 T01 7-2 67.0 7-3 66.0 1031-1 18 1 TS001 67.0 , 19-1 65.0 20-1 88.0 1037-1 21-1 72.0 1094-1 22-1 78.0 1031-1 23-1 62.0 B0031 965-1 6-1 02000 180 21.7 980-1 8-1 43.0 1009-1 10-1 57.7 O Page 5:TSABS:V2.15.1.a.10.1.96 Page 19
l /^' Background Correction Values ! \' Total Surface Activity - Beta Survey p-ES$
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Location Code: D4400TZZZZDZ Comments: Field Background (Bkg) reported in cpm / detector area. ; Medium Bkg reported in dpm/100 cm2 Count time reponed in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code 80034 994-1 9-1 02000 180 TM001 75.7 1,877.0 T01 9-2 68.3 ' 780-3 11-1 02203 15 480.0 G02 11-2 572.0 , 12-1 416.0 12-2 552.0 13-1 444.0 13-2 464.0 14-1 376.0 14-2 496.0 15-1 564.0 2025-3 16-2 60 877.0 E01 C 1 BMC01 1038-1 15-2 02000 180 56.0 0.0 T01 1009-1 16-1 50.7 i i 1 i l 1 l l O ! i l Page 6:TSABS:V2.15.1.a.10.1.% i Page 20 l l
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Summary of Efficiency Values PEE Total Surface Activity - Beta Survey [Wb55 r,.ca,.=..&, Location Code: D4400TZZZZDZ Survey Reasons: E01 - Replacement, G02 - Investigation, T01 - Initial Final Release Comments: Detector Detector Download # Efficiency Model Serial Number -Station # LMI 43-106/S PR126901 780-3 0.151 LMI 44-40B PR095101 965-1 0.125 LMI 44-40B PR095101 980-1 0.118 LMI 44-408 PR075084 994-1 0.131 LMI 44-40B PR075084 1009-1 0.130 LMI 43-94/100 PR124110 1031-1 0.039 LMI 43-94/100 PR124111 1037-1 0.038 LMI 44-40B PR075084 1038-1 0.136 LMI 43-98/200 PR123600 1053-1 0.061 LMI 43-106B PR128925 1060-1 0.214 LMI 43-94/100 PR124110 1094-1 0.039 LMI 43-98/300 PR123601 1096-1 0.030 LMI 43-94/100 PR124110 1183-1 0.038 LMI 43-94/075 PR124115 1258-1 0.030 LMI 43-94/100 PR124115 1889-3 0.028 LMI 43-106/S PR126905 2025-3 0.150 0 Page 7:TSABS:V2.15.1.a.10.1.96 Page 21
~~/ Survey Detection Equipment Used~~
[== Total Surface Activity - Beta Survey mmm Location Code: D4400TZZZZDZ Survey Reasons: E01 - Replacement, G02 - Investigation, T01 - Initial Final Release Medium Codes: B0019, B0023, B0031, B0034, BMC01 Download # - Survey User ID M2350 S/N Detector , Station Id S/N 780-3 CWl5440/126192 126192 PR126901 ! 965-1 RLN4080/98620 98620 PR095101 i 980-1 VMB6153/98620 98620 PR095101 l ('t ' 994-1 1009-1 DLB6373/98643 DLB6373/98643 98643 98643 PR075084 PR075084 l 1 1031-1 DLB6373/98642 98642 PR124110 I 1037-1 DLB6373/98620 98620 PR124111 1038-1 DTS6208/98643 98643 PR075084 1053-1 JMS1149/98643 98643 PR123600 1060-1 DPS4133/126175 126175 PR128925 1094-1 DLB6373/98642 98642 PR124110 1096-1 JMS1149/98620 98620 PR123601 1183-1 DAB 9854/126212 126212 PR124110 1258-1 JMS1149/80502 80502 PR124115 1889-3 JMS1149/80502 80502 PR124115 2025-3 DLB6373/126210 126210 PR126905 Program Version: V2.15.1.a.10.1.96 Report Printed At: 03:27:40 PM on 10/05/96 Total Pages: 8 Page 8:TSABS:V2.15.1.a.10.1.96 Na"p,*e 2Y
Statistical Summary Removable Surface Activity - Beta Survey gg gra ,.u.. g Location Code: D4400TZZZZDZ Survey Reasons: G02 - Investigation, T01 - Initial Final Release Medium Codes: B0019, B0023, B0031, B0034, BMC01 Net dpm/100 cm2 l Upper Confidence Limit (UCL) 3.8 l l Mean 1.9 l l Maximum 34.7 l l Minimum -7.6 l l Standard Deviation 7.0 l l Minimum Detectable Activity 25.8 l l Critical Level 9.8 l l Samples Reported 37 l l Samples Prescribed 37 l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 250.0 dpm/100 cm2 YES l Passed l Percent of Samples > 250.0 dpm/100 cm2 0.0 l Passed (5) l Number of Samples > 500.0 dpm/100 cm2 0 l Passed (6) l UCL of Mean less than or equal 1,000.0 dpm/100 cm2 YES l Passed (5) 25% Test (6) Single Measurement Test O Page 1:RSABS:V2.15.1.a.10.1.96 Page 23 FER_ STAT FEL
<3 ' Plant Systems Corrected Field Activity Values - (V Removable Surface Activity - Beta Survey I @@@ Location Code: D4400TZZZZDZ Comments: Activity (net). MDA, and CL reported dpm/100 cm2 Underlined values exceed the criticallevel. Bold values exceed 250.0 dpm/100 cm2 Italic values exceed 1,000.0 dpm/100 cm2 Medium RC# Location ID - MDA Critical Activity Reason Code Location # Level Code B0019 26.15295 1-1 23.6 8.7 7.9 T01 26.15296 1-2 23.6 8.7 -1.4 26.15297 1-3 23.6 8.7 5.6 26.15298 1-4 23.6 8.7 12.5 ! 26.15299 1-5 23.6 8.7 0.9 26.15300 1-6 23.6 8.7 6.0 B0023 26.17223 2-1 25.8 9.8 1.6 O 26.17224 2-2 25.8 9.8 -7.6 26.15652 3-1 24.9 9.3 -2.3 26.15653 3-2 24.9 9.3 0.0 26.15654 3-3 24.9 9.3 0.0 26.15329 4-1 24.9 93 -2.3 26.17225 5-1 25.8 9.8 -3.0 26.19268 7-1 21.5 7.6 4.6 26.14462 18-1 24.9 9.3 .. . .. 34.7 26.14463 19-1 24.9 9.3 -4.6 26.14464 20-1 24 9 9.3 -2.3 26.14465 21 1 24.9 9.3 0.0 26.14743 22 1 23.6 8.7 7.9 26.14467 23-1 24.9 9.3 2.3 B0031 26.12872 6-1 23.6 8.7 -1.4 26.12875 8-1 23.6 8.7 3.2 26.14109 10-1 20.3 7.0 5.3 rT (s.) Page 2:RSABS:V2.15.1.a.10.1.% Page 24 r.. no . .
Plant Systems Corrected Field Activity Values F== Removable Surface Activity - Beta Survey j.EM upg= Location Code: D4400TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 250.0 dpm/100 cm2 Italic values exceed 1,000.0 dpm/100 cm2 Medium RC# Location ID - MDA Critical Activity Reason Code Location # Level Code B0034 5 26.13311 0-1 24.0 8.8 -1.6 T01 26.13312 9-2 24.0 8.8 -3.9 26.41806 11-1 23.3 8.5 1.2 G02 26.41807 11-2 23.3 8.5 3.5 26.41801 12-1 23.3 8.5 58 26.41802 12-2 23.3 8.5 5.8 26.41798 13-2 23.3 8.5 -1.2 26.41799 13-3 23.3 8.5 5.8 26A1803 14-1 23.3 8.5 1.2 26.41804 14-2 23.3 8.5 1.2 l 26.41800 15-1 23.3 8.5 -5.8 l 26.41805 16-1 23.3 8.5 -1.2 BMC01 26.14477 15-2 24.9 9.3 0.0 T01 26.14110 16-1 20.3 7.0 3.0 l O, Page 3:RSABS:V2.15.1.a.10.1.96 Page 25
~~^g Graph of Activity versus location Series (d~~
~~Removable Surface Activity - Beta Survey~~
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Location Code: D4400TZZZZDZ Survey Reasons: G02 - Investigation, T01 - Initial Final Release Medium Codes: B0019, B0023, B0031, B0034, BMC01 t Guideline Value 1000.0 dpm/100 cm' 275 225- ------------- ------------------ -- --------------------------------. 175 7--- 1
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~~------ Critical level -.- MDA Guideline Value (off-scale) -.- Activity O~~
Page 4:RSABS:V2.15.1.a.10.1.96 GRFSL7LB.FSL Page 26
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1 l l Laboratory Equipment Used . l Removable Surface Activity - Beta Survey == m ) i Location Code: D4400TZZZZDZ l Survey Reasons:' G02 - Investigation, T01 - Initial Final Release l l Medium Codes: B0019, B0023, B0031, B0034, BMC01 i l Location Range Survey User ID Laboratory Serial j Equipment Number ' 11-1 to 11-2 AOK2982 LB-5100W SN5100W 12-1 to 12-2 AOK2982 LB-5100W SN5100W 13-2 to 13-3 AOK2982 LB-5100W SN5100W 14-1 to 14-2 AOK2982 LB-5100W SN5100W , 15-1 AOK2982 LB-5100W SN5100W 16-1 AOK2982 LB-5100W SN5100W 2-1 to 2-2 BJB1396 LB-5100W SN5100W 5-1 BJB1396 LB-5100W SN5100W ! 7-1 DLB6373 LB-5100W SN5100W I 8-1 DLB6373 LB-5100W SN5100W 9-1 to 9-2 DLB6373 LB-5100W SN5100W l 10-1 DLB6373 LB-5100W SN5100W l Program Version: V2.15.1.a.10.1.96 Report Printed At: 12:09:36 PM on 10/07/96 O' Page 5:RSABS:V2.15.1.a.10.1.96 Page 27 FSR_LSY1FS
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Laboratory Equipment Used Removable Surface Activity - Beta Survey ,e = ,. =.& l Location Code: D4400TZZZZDZ j i Survey Reasons:' G02 - Investigation, T01 - Initial Final Release l Medium Codes: B0019, B0023, B0031, B0034, BMC01 .
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i Location Range Survey User ID Laboratory Serial l Equipment Number 16-1 DLB6373 LB-5100W SN5100W 18-1 DLB6373 LB-5100W SN5100W 20-1 DLB6373 LB-5100W SN5100W 21-1 DLB6373 LB-5100W SN5100W O' 23-1 15-2 DLB6373 LB-5100W SN5100W JDT2759 LB-5100W SN5100W 3-1 to 3-3 JMS1149 LB-5100W SN5100W ,
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4 4-1 RLN4080 LB-5100W SN5100W 6-1 RLN4080 LB-5100W SN5100W i 1-1 to 16 VMB6153 LB-5100W SN5100W 19-1 VMB6153 LB-5100W SN5100W 1 1 I i Program Version: V2.15.1.a.10.1.96 p Report Printed At: 12:09:45 PM on 10/07/96
~~%J Total Pages: 6 Page 6:RSABS:V2.15.1.a.10.1.%~~
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Scientific Ecology Group, Inc. g Radiological Engineering & Deconunissioning Services -~~ I Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record Contents Survey Area Survey Area ID: Survey Area Description Pages D4400 Domestic Water System, System #44 2-3 Survey Unit (s) Location Code Survey Unit Description Pages
~~! D4402 TZZZZ EZ11)! 4-28 San ry Sewage~~
~~D4402 TZZZZ EZG01 O~~
~~t i i Prepared By: Ut SEG Radidlogical Engineer A / /o-27 % Date Reviewed By: f"#8AW SEG Project Radiation Protection Manager~~
~~/ /o/ 4 li' Date Approved By: . r,* n go43r / /o/2 < /r/~~
PSCo Radiation Protection Manager Date Page 1
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Scientific Ecology Group, Inc. gg RadiologicalEngineering & Decommissioning Services ~~~ Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record - Survey Area Survey Area: D4400 Survey Area
~~Description:~~
Domestic Water System, System #44 Survey Area Packages: This Survey Area was segregated and surveyed in accordance with the following survey packages: D4400 Domestic Water System D4402 Sanitary Sewage The Domestic Water System provided a source of relatively pure water for domestic usage (drinking fountains, eye wash fountains, toilets, showers, cooking, etc.), for cycle make-up and for laboratory use. This survey area was broken into two survey units: Domestic Water System , (package D4400) which consisted of most of the domestic water system supply and drains ! including storage tank, drinking fountains, toilets, etc., and Sanitary Sewage (package D4402) I which consisted of select sink drains and the downstream sewer where elevated activity was found during the initial final survey of D4400.
~~' The Domestic Water System (Survey Package D4400) was surveyed as an Unaffected System and the Sanitary Sewage (Survey Package D4402) was surveyed as an Affected System.~~
Measurement locations were marked on maps to designate where sample measurements were collected. Survey Area OperationalIllstory: The Domestic Water System was in operation prior to plant shutdown August 18,1989. The ; Domestic Water System will be used for repower operations. j Prior to final survey, the Domestic Water System had no known history of radioactive - contamination events. However, during final survey, elevated readings were found in a sink trap i used by the general labor force during decommissioning. Therefore, the affected sink drain, similar sink drains and downstream sewer were reclassified as an Affected portion of Survey Area D4400 and surveyed as an affected survey unit with package D4402. Survey Area Decommissioning and Remediation Activities: The affected sink drain trap containing elevated activity was removed for disposal as radioactive waste. A Page 2
Isolation and Control Measures: Level 2 Controls When appropriate, disassembled components were reassembled following survey. If reassembly O was delayed or not performed, component openings were sealed with tape or other appropriate material to maintain isolation control. Sinks and toilets were returned to service following survey. This system remains in service. Survey Area
~~Conclusions:~~
The results of total and removable surface activity measurements collected within this survey area meet the criteria for release for unrestricted use. The level of removable H-3/Fe-55 measured was well below the administrative action level. Survey Area
~~References:~~
Initial Radiological Site Characterization Report Volumes 1,2,11. System Description (SD-44) Domestic Water System 90-PF-44, 90-PI-44 Discussion with PSCo and Westinghouse Team personnel. O O Page 3
Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Services g
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Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record - Survey Unit Location Code: D4402 TZZZZ EZ Group ID Surface Category Survey Area Number Survey Unit Classification D 4402 System Internals (Aff ed) Survey Reason: T01 - Initial Final Release G01 - Investigation Survey Unit
~~Description:~~
Sanitary Sewage Survey Design: Measurement Type No. of Measurements Description O Beta Scan N/A Scanned accessible surface at each total surface activity location. No areas of elevated activity were identified. Total Surface 76 Collected total surface activity measurements at Activity designated locations from 29 plant system l components.
]
py Smears 51 Collected smears at designated locations from 29 plant system components. I Special Samples 15 Collected I tritium and iron-55 removable activity sample and 14 scale / sediment samples at prescribed locations. Page 4
i Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Services g
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Fort St. Vrain Nuclear Generating Station Decommissioning Project g Survey Unit Investigations: Investigation #1 l A deep sink drain trap was identified as having elevated readings during Surface and Structure survey of C0026 on level 7 of the Service Building. Investigation #2 in final survey package D7501 indicated that the total surface activity at the sink drain trap was 3150 , dpm/100 cm', and at a similar sink drain trap it was 2940 dpm/100cm2 . This information is ! contained in download 704-3 in final survey package D7501. Sediment samples taken at the two locations indicated 165 pCi/g and 5 pCi/g of licensed material, respectively. Investigations were written for package D7501 because these sinks were thought to drain to the turbine building sump (which is part of D7501). During the D7501 investigations, it was determined that the shks actually drained to the sewer plant (which is part of D4402). Therefore, the D7501 investigations were closed and this investigation was initiated. Additional sediment samples collected in various locations downstream of the deep sinks contained licensed material in a range of 1.8 to 21 pCi/g. Because some of this piping contained significant quantities of material, the affected piping was removed and disposed of as radioactive waste. This resulted in the removal of about 75 feet of piping. g The openings of the remaining piping was final surveyed by an addendum package which added locations 38 through 52 to final survey package D4402. All removable and total surface activity measurements taken in these locations were below the affected system I unrestricted use release criteria. O Page 5
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Fort St. Vrain Nuclear Generating Station Decommissioning Project Survey Location Summary Mc " ""'n s Location at Description CdIm d Number 6 - TSA First clean out in the sewage Turbine Building, Izvel 7, 6 - RSA drain line (3") from the MK 4829' east 24 1 - H-3/Fe-55 trailer on Turbine Building 1 - Sediment Izvel7 l 6 - TSA Second clean out in the Turbine Building, Izvel 7, l l 6 - RSA sewage drain line (4") from 4829' cast 3 1 - Sediment the MK trailer on Turbine Building Izvel 7 6 - TSA Third clean out in the sewage Turbine Building, Izvel 6, 6 - RSA drain line (4") from the MK 481l' northeast 26 1 - Sediment trailer on Turbine Building level 7
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6 - TSA Founh clean out in the sewage Turbine Building,12 vel 6, 6 - RSA drain line (4") from the MK 481l' northwest 27 1 - Sediment trailer on Turbice Building i Izvel7 , 1 6 - TSA Fifth clean out in the sewage Turbine Building, Ixvel 6, 6 - RSA drain line (4") from the MK 481l' nonhwest 28 1 - Sediment trailer on Turbine Building level 7
\
2 - Sediment Sewage Treatment Facility Yard nonh of Reactor 29 Building 4 - Sediment Sewage Lagoon #1 Yard nonh of Reactor 30 Building 2 - Sediment Sewage Lagoon #2 Yard north of Reactor 31 Building 1 - TSA Sink Drain Trap Service Building level 7 32 1-RSA nonhwest, north sink in men's rest room 1 - TSA Sink Drain Trap Service Building Ixvel 7 . 33 1 - RSA nonhwest, center sink in men's rest room Page 8
I Survey Measurements Loc, y " Description Location Collected Number 1 - TSA Sink Drain Trap Service Building level 7 34 1 - RSA northwest, south sink in men's rest room 1 - TSA 1.5" Sink Drain Trap Turbine Building Level 7 35 1 - RSA northwest, PSC men's locker l 1 - Sediment room 1 - TSA Sink Drain Trap Technical Support Center 36 1 - RSA Building, level 5, radiochemistry lab rest room 1 - TSA Sink Drain Trap Turbine Building Level 7
?'r 1-RSA nonheast, PSC control room rest room 1 - TSA Floor Drain Header Service Building level 6 38 1 - RSA Survey area C0019 3 - TSA Cleanout downstream oflevel Service Building Izvel 6 39 1 - RS A 7 mens room sinks and urinals Survey area C0019 1 - TS A level 5.5 chemistry lab drain Service Building Izvel 5 40 1 - RSA header Survey area C0004 2 - TS A Downstream of p-trap from Service Building Ixvel 6 41 1 - RSA level 7 janitor sink, etc. (north Survey area C0019 side of service building) 3 - TSA level 7 gutter shower dlains Service Building level 6 42 1 - RSA header Survey area C0019 3 - TSA level 7 control room sanitary Turbine Building level 6 43 1-RSA drain header cleanout Survey area C0021 3 - TSA level 7 control mm sar,itary Turbine Building level 6 44 1 - RSA drain header cleanoet Survey area C0021 3 - TSA Cleanout downstream ot lmel Service Building 12 vel 5 45 1-RSA 6 janitor sink Survey area C0004 3 - TSA Cleanout downstream of level Service Building Levei 5 4
1-RSA 6 mens room toilets Survey area C0004 3 - TSA Cleanout downstream oflevel Service Building Izvel 5 1 - RSA 6 mens room toilets, and Survey area C0004 47 drains from level 7 south Service Bldg. sinks and water fountains Page 9
i Description Location C : Number 3 - TSA Cleanout downstream of p-trap Service Building level 6 48 1 - RSA from level 7 north Service Survey area C0019 l Bldg. drains , 3 - TSA Vertical above level 5 mens Service Building Ixvel 5 i
~~' 49 1 - RSA room toilets and first aid sinks Survey area C0004 i 3 - TSA Vertical below level 5 mens Service Building 12 vel 5 ,~~
50 1 - RSA room toilets and first aid sinks Survey area C0004 3 - TSA Header from Service Bldg. to Service Building level 5 l 51 1 - RSA first cleanout outside the Survey area C0004 i , building 3 - TSA Header from first cleanout Yard west of service building 52 1 - RSA outside the building to the Survey area 10004 sewer tank
)
i i 1 x Page 10
Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Services
~~' gg -~~~~
Fort St. Vrain Nuclear Generating Station Decommissioning Project Special Samples Imcation Code: D4402 ZZZZZ EZT01 Comments: H-3 & Fe-55 activity reported in Net dpm/100 cm2 Scale / Sediment activity reported in pCi/g Underlined values exceed the critical level Bold values exceed 250 dpm/100 cm2 Italic values exceed 1,000 dpm/100 cm2 Tritium and Iron-55 Removable Activity Samples Location # Type of Sample Critical Level MDA Activity 24-1 H-3 & Fe-55 11.6 25.9 51.5 Scale / Sediment Samples Location # Licensed Critical Level MDA Activity Nuclides Identified i 24-1 Co-60 2.74E-01 6.35E-01 8.68 Cs-137 3.03E-01 6.70E-01 8.78 25-1 None 9.29E-02*
1.94E-Ol *

N/A 26-1 Co-60 6.94E-02 1.45E-01 5.46E-01 Cs-137 7.09E-02 1.46E-01 4.99E-01 i
27-1 Co-60 5.12E 02 1.13E-01 4.88E-01 i Cs-137 6.95E-02 1.47E-01 4.53E-01 l 28-1 Co-60 4.66E-02 1.03E-01 1.20E-01 i 29-1 Cs-137 1.73E-02 3.64E-02 5.51E-02 29-2 Co-60 2.71E42 5.72E-02 1.63 Cs-137 2.85E-02 5.91E-02 3.18E-01 30-1 Co-60 2.13E-02 4.52E-02 6.08E-02 Cs-137 2.63E-02 5.44E 02 7.69E-02 30-2* Co-60 1.55E-02 3.53E-02 6.05E-02 30-3 Co-60 7.00E-02 1.49E-01 2.58E-01 Cs-137 5.18E-02 1.10E-01 1.27E-01 Page11
i Location # Licensed Critical Level MDA Activity f O. Nuclides ident1 fled j 30-4 Co-60 3.76E 02 8.00E-02 1.49E-01 Cs-137 3.31E-02 6.93E-02 2.03E-01 31-l* Cs-137 2.19E-02 4.67E-02 5.45E-02 31-2* None 3.94E-02*
8.37E42** N/A i 35-1 Co-60 1.01e-01 2.08E-01 9.26E-01 l

Sample locations contained very little sediment, sample consisted mostly of water
** Critical Ixvel and MDA reported for Co-60 Comments on Scale / Sediment Samples The Cs-137 and Co-60 concentrations detected in the sediment samples from the sewage plant and lagoons were below guideline values established for licensed radionuclide concentrations in soil at FSV. Results were compared to soil values because, should this material ever be released to the environment, deposition in soil is the most likely scenario.
Cs-137 and Co-60 were detected on many of the scale / sediment samples but were at low levels. The piping scale samples (i.e., locations 24 - 28, and 35) were below I pCi/g except O for location 24 which detected about 9 pCi/g of both Cs-137 and Co-60. Even though this exceeds NUREG 1500 values, the amount of material in the pipes was of low volume (i.e., surface scale) and the removable and total surface activity measurements taken at each piping scale sample location (including location 24) were well below action levels. l i O : i I Page 12
Compilation of Statistical Sununaries Total Surface Activity - Beta Survey NESS
.~ ~. = =. ~. A Removable Surface Activity - Beta Survey Location Code: D4402TZZZZEZ Medium Code: B0023 Comments: Total Surface Activity (TSA) reponed in Net dpm/100 cm2 Removable Surface Activity (RSA) reponed in Net dpm/100 cm2 I
TSA RSA Upper Confidence Limit (UCL) h1can 141.5 39.3 1.1 0.3 h h1aximum 1,671.9 10.9 hiinimum -1,375.0 -5.5 Standard Deviation 533.3 3.5 hiinimum Detectable Activity 2,592.2 24.9 Critical Level 1,272.4 9.3 Samples Reported 76 51 l Samples Prescribed 76 51 l l l i Page 1: ERGS:V2.12.1.a.9.13.96 ! Page 13 l 1 I
Statistical Summary Total Surface Activity - Beta Survey g gg= Location Code: D4402TZZZZEZ 4 Survey Reasons: T01 - Initial Final Release, G01 - Investigation Medium Code: B0023 I l l Net dpm/100 cm2 l Upper Confidence Limit (UCL) 141.5 l l Mean 39.3 l l l Maximum 1,671.9 l l Minimum -1,375.0 l g l Standard Deviation 533.3 l l Minimum Detectable Activity 2,592.2 l l Critical Level 1,272.4 l l Samples Reported 76 l
.l Sampies Prescribed 76 l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 3,000.0 dpm/100 cm2 YES l Passed l Percent of Samples > 3,000.0 dpm/100 cm2 0.0 l Passed (3) l Number of Samples > 4,000.0 dpm/100 cm2 0 l Passed (4) l UCL of Mean less than or equal 4,000.0 dpm/100 cm2 YES l Passed (3) 10% Test (4) Single Measurement Test i
l f3 d Page 1:TSABS:V2.12.1.a.9.13.% Page 14 FSR. STAT FSL J
Plant Systems Corrected Field Activity Values l-1 IS k W Total Surface Activity - Beta Survey i. c m . d Location Code: D4402TZZZZEZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 3,000.0 dpm/100 cm2 Italic values exceed 4,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0023 371-3 24-1 240 1,600.9 783.5 -1,062.5 T01 24-2 1.520.1 743.1 50.0 24 3 1,558.3 762.2 -462.5 24-4 1,634.1 800.1 -1,375.0 24-5 1,614.9 790.5 -625.0 24-6 1,611.7 789.9 -887.5 370-3 25-1 180 866.8 421.4 442.5 25-2 893.6 434.8 185.8 25-3 904.2 440.1 433.6 25 4 896.5 436.3 150.4 25-5 803.6 434.8 132.7 25-6 880.8 428.4 495.6 26-1 758.3 367.1 -247.8 26-2 722.8 349.4 -44.2 26-3 738.4 357.2 247.8 26-4 746.6 361.3 -17.7 26-5 779.9 378.0 -336.3 26-6 786.6 381.3 -513.3 27-1 803.1 389.5 477.9 27-2 831.9 404.0 -265.5 27-3 809.6 392.8 -177.0 27-4 810.7 393.3 -177.0 27-5 803.1 389.5 44.2 27-6 754.8 365.4 486.7 28-1 699.3 337.7 -274.3 28-2 663.2 319.6 -265.5 28-3 640.3 308.1 238.9 28-4 676.3 326.2 -106.2 28-5 661.9 319.0 -35.4 28-6 667.2 321.6 -247.8 454-3 32 1 1800 1,727.6 847.7 -687.5 33-1 1,722.2 845.0 474.2 34-1 1,775.4 871.6 391.2 472-3 35-1 2400 2,374.3 1,163.4 402.7 445 3 36-1 1800 2,093.7 1,028.3 657.9 472-3 37-1 2400 2.592.2 1,272.4 157.6 1369-3 38-1 240 1,742.6 850.1 -125.0 G01 39-1 1,784.1 870.9 1.671.9 39-2 1,877.2 917.4 500.0 39-3 1,895.8 926.7 562.5 Page 2:TSABS:V2.12.1.a.9.13.95 Page 15
Plant Systems Corrected Field Activity Values == V Total Surface Activity - Beta Survey Sb$5 gem = Location Code: D4402TZZZZEZ ' Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 3,000.0 dpm/100 cm2 Italic values exceed 4,000.0 dpm/100 cm2 Co.mt time reponed in seconds. Medium Download # Location ID - Count MDA Critical Activity Reason ! Code Station # Location # Time Level Code l B0023 1369-3 40-1 240 2,229.4 1,093.5 471.9 G01 1379-3 41-1 1,360.2 656.8 154.6 , 41-2 1,328.2 640.8 1.118.8 1415-3 42-1 1,267.5 611.3 115.6 42-2 1,215.6 585.4 594.8 42-3 1,228.2 591.7 892.1 1381-3 703.7 341.6 249.9 43-1 43-2 720.7 350.1 166.6 43-3 725.2 352.3 37.9 44-1 730.4 355.0 90.9 44-2 705.5 342.5 401.3 44-3 666.3 322.9 643.6
) 1370-3 45-1 1,318.2 635.8 -137.5 45-2 1,251.0 602.2 841.9 45-3 1,300.4 626.9 171.8 1405-3 46-1 1,222.8 589.9 238.6 46-2 1,173.0 565.0 461.4 j 46-3 1,204.1 580.5 429.6 47-1 1,229.8 593.3 -365.9 47-2 1,227.5 592.2 318.2 47-3 1,252.7 604.8 63.6 48-1 1,182.7 569.8 238.6 48-2 1,123.4 540.2 763.7 48-3 1,185.1 571.0 302.3 1379-3 49-1 1,396.2 674.8 -515.5 49-2 1,362.6 658.0 927.8 49-3 1,454.1 703.8 -996.6 50-1 1,345.5 649.5 -670.1 50-2 1,194.0 573.7 274.9 50-3 1,248.4 600.9 206.2 51-1 1,550.7 752.1 498.3 51-2 1,621.3 787.4 704.5 51 3 1,586.4 769.9 -618.6 52-1 1,559.2 756.3 292.1 52-2 1,576.0 764.7 343.6 52-3 1,651.4 802.4 584.2 O
Page 3:TSABS:V2.12.1.a.9.13.96
i Graph of Activity versus I2) cation Series == Total Surface Activity - Beta Survey gargs (5555 Location Code: D4402TZZZZEZ Survey Reasons: T01 - Initial Final Release, G01 - Investigation l Medium Code: B0023 Average Guideline Value 4000.0 dpm/100 cm' 4000 == ==- -
- - - - = + = - - - - =- - =- -- =- ---- =
3500- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3000- ------------------------------------------------------------------- 2500-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - " - - - - - - - - - - - - - - - - - - - - 2000- -- -- --------------- -------------------- - ---- --------------
~~"e .. -~~
E 1500- ".=" O "'* * , , 1000--------- v ,- g,"N ---------------
, =++*** % ,---- -- --- - - -- -/ - ---- ------- -~ ;c; 500 -------- g- y,_. ----- g --,------.-,/---.*---------/-
~~b /i\ /,[\,*\,~~
~~"~* '~~
~~0-- 1 , - - . 1 3 ,~~
\/ \ \e4 e4 \e.-- e s' se a ---\h --.--------. -.--.- .-.---- -500-- -------------- ,----.---.---
~~i 'g 10004,--- ------- --------------------- -------------------------------~~
-1500 i''''''! ! ! ! ' i '''' '''''''''''! ''
hd h4 $4 kl ks 65 kl asi ki 274 hd hi 2sd 2'sd ki a' d $d ssd El ki 64 ind hd 4sd isd i44 24-2 244 244 252 254 254 262 264 264 27-2 27-4 274 28-2 264 264 33-1 351 37-1 391 39-3 41-1 42-1 423 412 44-1 44-3 Location Series
---- Critical level --.- M D A --.- Average Guideline Value -.- Activity Page 4:TSABS:V2.12.1.a.9.13.96 Page 17 GRFSL7L8.FSL
~~i l l Graph of Activity versus Location Series Total Surface Activity - Beta Survey pe==~~
~~-3@@~~
Location Code: D4402TZZZZEZ Survey Reasons: T01 - Initial Final Release, G01 - Investigation Medium Code: B0023 4 Average Guideline Value 4000.0 dpm/100 cm2 4000 - - -- - - - 3500-------- ------------------ --------------- -------- ---------------- 3000-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2500-------------------- ----------------------------------------------- 2000---- ---------------------------------------------------------- ---- 8 c 1500----- ----------------- -- - ----------- y -------
~~^~-.~-,--~~
f~. ~. _, _._.-.x,,/ x,- g 1000----f----------------------------------------------------------- 2; / 7 , ~_ _ 500--- 8 . ~_; _ %_/ \ _., / ^ -
~~---- -----. y ---- -- - 7--~~
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~~\ / \ /\/~~
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~~500-- - - - - - - - - - - ------- ---- - --------=------- y ,.-- -----~~
~~. ---- \-- -~~
1000- ! ! l I l l l l l ! l I's l ! l l l ! 45 1 454 46-2 47-1 47-3 48-2 41 49-3 60 2 61-1 61-3 52-2 Location Series
----- Critical level -.- MDA Average Guideline Value -.- Activity .
O Page 5:TSABS:V2.12.1.a.9.13.96 Page 18 , GRFSL7L8.FSL _____._________.._i
Background Correction Values Total Surface Activity - Beta Survey
~~-BM@@~~
9,, .t = , Location Code: D4402TZZZZEZ Comments: Field Background (Bkg) reported in cpm / detector area. Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0023 371-3 24-1 02311 240 TM001 181.5 0.0 T01 24-2 163.3 24-3 171.8 ' 24-4 189.3 l 24-5 184.7 24-6 184.0 370-3 25-1 02100 180 139.7 25-2 148.7 25-3 152.3 25-4 149.7 i l i 25-5 148.7 25-6 144.3 26-1 106.0 j 26-2 96.0 26-3 100.3 l 26-4 102.7 ; 26-5 112.3 l 26-6 114.3 , 119.3 l 27-1 27-2 128.3 27-3 121.3 27-4 121.7 27-5 119.3 27-6 105.0 28-1 89.7 28-2 80.3 , 28-3 74.7 28-4 83.7 28-5 80.0 284 81.3 454-3 32-1 02156 1800 TS001 31.5 33-1 31.3 34-1 33.3 472-3 35-1 02154 2400 20.4 445-3 36-1 02156 1800 34.7 472-3 37-1 02154 2400 24.4 1369-3 38-1 02311 240 TM001 136.8 G01 1 39-1 143.5 39-2 159.3
)
~~39-3 162.5~~
)
Page 6:TSABS:V2.12.1.a.9.13.96
Background Correction Values (] Total Surface Activity - Beta Survey ,4, , Locatian Code: D4402TZZZZEZ Comments: Field Background (Bkg) reported in epm / detector area. Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0023 1369-3 40-1 02311 240 TM001 226.3 0.0 G01 1379-3 41-1 02101 67.5 41-2 64.2 1415-3 42-1 63.3 42 2 58.0 42-3 59.3 1381-3 43-1 02100 94.0 43-2 98.7 43-3 100.0 44-1 101.5 44-2 94.5 Q h 1379-3 44-3 45-1 02101 84.0 63.3 45-2 56.7 45-3 61.5 1405-3 46-1 63.5 46-2 58.2 46-3 61.5 47-1 64.2 47-2 64.0 47-3 66.8 48-1 59.3 48-2 53.2 48-3 59.5 1379-3 49-1 71.3 49-2 67.7 49-3 77.5 50-1 66.0 50-2 51.5 50-3 56.5 51-1 88.5 51-2 97.0 51-3 92.8 52-1 89.5 52-2 91.5 52-3 100.8 Page 7:TSABS:V2.12.1.a.9.13.96 Page 20
Summary of Efficiency Values Total Surface Activity - Beta Survey g gym = Location Code: D4402TZZZZEZ Survey Reasons: T01 - Initial Final Release, G01 - Investigation Comments: Detector Detector Download # Efficiency Model Serial Number -Station # SEG SP-175-3M PR024349 370-3 0.081 LMI 43-98/300 PR117963 371-3 0.020 SEG SN-050-6K PR092950 445-3 0.032 SEG SN-050-6K PR092950 454-3 0.037 SEG SN-050-4K PR092949 472-3 0.028 LMI 43-98/300 PR117961 1369-3 0.016 SEG SP-113-3M PR621311 1379-3 0.075 SEG SP-175-3M PR096141 1381-3 0.071 SEG SP-113-3M PR621311 1405-3 0.081 SEG SP-113-3M PR621311 1415-3 0.078 O Page 8:TSABS:V2.12.1.a.9.13.96 Page 21
k i Survey Detection Equipment Used Total Surface Activity - Beta Survey g g r a m.- Location Code: D4402TZZZZEZ Survey Reasons:' T01 - Initial Final Release, G01 - Investigation i l Medium Code: B0023 i Download # - Survey User ID M2350 S/N Detector Station Id S/N 370-3 VMB6153/126195 126195 PR024349 371-3 AOK2982/126175 126175 PR117963 445-3 ELS8308/126179 126179 PR092950 0-454-3 472-3 1369-3 CBA0876/126212 CBA0876/126212 CWl5440/98643 126212 126212 98643 PR092950 PR092949 PR117961 1379-3 DLB6373/126190 126190 PR621311 1381-3 CWl5440/98643 98643 PR096141 1405-3 DLB6373/126190 116190 PR621311 1415-3 DLB6373/126190 126190 PR621311 Program Version: V2.12.1.a.9.13.96 Report Printed At: 11:17:10 AM on 09/18/96 Total Pages: 9 Page 9:TSABS:V2.12.1.a.9.13.96 Page 22
Plant Systems Corrected Field Activity Values Removable Surface Activity - Beta Survey h$f$ i.g.==$. Location Code: D4402TZZZZEZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bcld values exceed 562.5 dpm/100 cm2 Italic values exceed 750.0 dpm/100 cm2 Medium RC# Location ID - MDA Critical Activity Reason Code Location # Level Code B0023 26.26547 24-1 22.6 8.2 3.9 T01 26.26548 24-2 22.6 8.2 6.2 26.26549 24-3 22.6 - 8.2 -3.0 ; 26.26550 244 22.6 8.2 3.9 26.26551 24-5 22.6 8.2 -0.7 26.26552 24-6 22.6 8.2 1.6 26.26541 25-1 22.6 8.2 1.6 , 26.26542 25-2 22.6 8.2 8.6 l 26.26543 25-3 22.6 8.2 -3.0 - 26.26544 25-4 22.6 8.2 -3.0 l 26.26545 25-5 22.6 8.2 -0.7 26.26546 25-6 22.6 8.2 -3.0 26.26553 26-1 22.6 8.2 -C.7 26.26554 26-2 22.6 8.2 10.9 26.26555 26-3 22.6 8.2 -3.0 26.26556 26-4 22.6 8.2 3.9 26.26557 26-5 22.6 8.2 3.9 26.26558 26-6 22.6 8.2 -3.0 26.26529 27-1 22.6 8.2 1.6 l 26.26530 27-2 22.6 8.2 1.6 l 26.26531 27-3 22.6 8.2 -0.7 26.26532 27 4 22.6 8.2 3.9 26.26533 27-5 22.6 8.2 -3.0 26.26534 27-6 22.6 8.2 -3.0 26.26535 28-1 22.6 8.2 -0.7 ; 26.26536 28-2 22.6 8.2 3.9 ! 26.26537 28-3 22.6 8.2 1.6 26.26538 28-4 22.6 8.2 1.6 26.26539 28-5 22.6 8.2 3.9 26.26540 28-6 22.6 8.2 -3.0 26.30654 32-1 22.9 8.3 -3.2 26.30655 33-1 22.9 8.3 -3.2 26.30656 34-1 22.9 8.3 -0.9 26.31814 35-1 24.0 9.3 -2.3 26.30659 36-1 22.9 8.3 -0.9 26.31815 37-1 24.9 9.3 4.6 26.67366 38-1 22.8 8.3 -0.9 G01 26.67367 39-1 22.8 8.3 0.9 26.67368 40-1 22.8 8.3 -0.9 26.67360 41-1 22.8 8.3 -3.2 Page 2:RSABS:V2.12.1.a.9.13.96 Page 23
~~... nom .~~
~~'Q Plant Systems Corrected Field Activity Values -~~
[Ed@$ ('/ Removable Surface Activity - Beta Survey ,+4=m Location Code: D4402TZZZZEZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underimed values exceed the critical level. Bold values exceed 562.5 dpm/100 cm2 Italic values exceed 750.0 dpm/100 cm2 Medium RC# Location ID - MDA Critical Activity Reason Code Location # Level Code B0023 26.68478 42-1 22.8 8.3 -0.9 G01 26.67369 43-1 22.8 8.3 -0.9 26.67370 44-1 22.8- 8.3 -0.9 26.67361 45-1 22.8 8.3 -3.2 26.67569 46-1 22.8 8.3 1.4 26.67570 47-1 22.8 8.3 6.0 26.67571 48-1 22.8 8.3 1.4 26.67362 49-1 22.8 8.3 -5.5 26.67363 50-1 22.8 8.3 -0.9 26.67364 51-1 22.8 8.3 -5.5 26.67365 52-1 22.8 8.3 3.7 O l 1
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~~U Page 3:RSABS:V2.12.1.a.9.13.96 Page 24~~
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=
Graph of Activity versus Location Series r=f$$$$ l Removable Surface Activity - Beta Survey g= m Location Code: D4402TZZZZEZ i Survey Reasons: T01 - Initial Final Release, G01 - Investigation 4 Medium Code: B0023 d Guideline Value
750.0 dpm/100 cm' 1 800 -

! 700- ---------------- ---------------------------------------------------
600- --------- ------------------ --------------------------- ----------- 500- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - N !. 8 , g 400-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5 3 1 c 300------------------------------- ------------- ----------- -----------
Y Z

200-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
~~100-------------------------- ------------------------------------------~~
~~..+..-.--.-.4-.+-.+.4+.-.+.+.+..+.+.+.+.+*-.+.+.--.-*+.+=~~
0-*-F24-W4444 3^2F2 a4 *
~~T"742h*444 5T!~ ^ ET!-- !E93%*4?, 2 i~~
4
~~-100 ' ' ' ' ''''''''''''''''''''''''''''''''''''''''''~~
i4d d44 2'44 il 2d iS4 ki ki ki hd 274 h4 St Si 2sd 3d i4d ki isd 61' hd 64 d6d ki 61' h 1 24-2 244 244 25-2 25 4 254 26-2 26 4 264 27-2 274 274 28-2 26-4 284 33-1 351 371 391 41-1 43-1 e5-1 47-1 491 51 1
! Location Series Critical level - -- MDA Guideline Value --.- Activity .
Page 4:RSABS:V2.12.1.a.9.13.96 Page 25 GRFSL7L8.FSL
Statistical Summary Removable Surface Activity - Beta Survey gg gu m i l l Location Code: D4402TZZZZEZ Survey Reasons: T01 - Initial Final Release, G01 - Investigation l Medium Code: B0023 l l Net dpm/100 cm2 l Upper Confidence Limit (UCL) 1.1 l l Mean 0.3 l l Maximum 10.9 l l Minimum -5.5 l
, (-) l Standard Deviation 3.5 l kJ l Minimum Detectable Activity 24.9 l l Critical Level 9.3 l l Sampies Reported 51 l l Sampies Prescribed 51 l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 187.5 dpm/100 cm2 YES l Passed l Percent of Samples > 562.5 dpm/100 cm2 0.0 l Passed (3) 1 l Number of Samples > 750.0 dpm/100 cm2 0 l Passed (4) l UCL of Mean less than or equal 750.0 dpm/100 cm2 YES l Passed (3) 10% Test (4) Single Measurement Test ,0 V
Page 1:RSABS:V2.12.1.a.9.13.% Page 26 FSR_ STAT FSL
Laboratory Equipment Used Removable Surface Activity - Beta Survey g
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Location Code: D4402TZZZZEZ Survey Reasons: T01 - Initial Final Release, G01 - Investigation Medium Code: B0023 i Location Range Survey User ID Laboratory Serial Equipment Number 27-1 to 27-6 AOK2982 LB-5100W SN5100W l 35-1 CBA0876 LB-5100W SN5100W l 37-1 CBA0876 LB-5100W SN5100W I 38-1 39-1 CWl5440 CWl5440 LB-5100W LB-5100W SN5100W SN5100W g 40-1 CW15440 LB-5100W SN5100W 43-1 CWl5440 LB-5100W SN5100W 44-1 CWl5440 LB-5100W SN5100W 36-1 ELS8308 LB-5100W SN5100W 32-1 JMS1149 LB-5100W SN5100W 33-1 JMS1149 LB-5100W SN5100W 34-1 JMS1149 SN5100W LB-5100W 28-1 to 284 PDG1526 LB-5100W SN5100W Program Version: V2.12.1.a.9.13.96 Report Printed At: 11:20:15 AM on 09/18/96 Page 5:RSABS:V2.12.1.a.9.13.96 Page 27 FSR_LSYS.FS
I Laboratory Equipment Used Removable Surface Activity - Beta Survey g gram , Location Code: D4402TZZZZEZ Survey Reasons: T01 - Initial Final Release, G01 - Investigation Medium Code: B0023 Location Range Survey User ID Laboratory Serial Equipment Number 41-1 PDG1526 LB-5100W SN5100W 42-1 PDG1526 LB-5100W SN5100W 61 PDG1526 LB-5100W SN5100W 46-1 PDG1526 LB-5100W SN5100W 47-1 PDG1526 LB-5100W SN5100W 48-1 PDG1526 LB-5100W SN5100W 49-1 PDG1526 LB-5100W SN5100W 50-1 PDG1526 LB-5100W SN5100W 51-1 PDG1526 LB-5100W SN5100W 52-1 PDG1526 LB-5100W SN5100W 24-1 to 24-6 VMB6153 LB-5100W SN5100W 25-1 to 25-6 VMB6153 LB-5100W SN5100W 26-1 to 264 VMB6153 LB-5100W SN5100W Program Version: V2.12.1.a.9.13.96 Report Printed At: 11:20:24 AM on 09/18/96 Total Pages: 6 Page 6:RSABS:V2.12.1.a.9.13.% Page 28 FSR_LSYS.FS
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Scientific Ecology Group, Inc. ggg () Radiological Engineering & Decommissioning Sen' ices Fort St. Vrain Nuclear Generating Station Decommissioning Project
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l Release Record Contents l l l Survey Area Survey Area ID: Survey Area Description Pages D4500 Fire Protection System 2-3 )
~~1 Survey Unit (s)~~
Location Cmle Survey Unit Description Pages D4500 ZZZZZ DZTV)1 Fire Protection System 4-29 O Prepared By: W hp %~ / /O-2[- FM SEG RadiggiMtiigineer Date Reviewed By: / t o/z 6 /#16 SEGJYoject Radiation Protection Manager Date Approved By: , I w 44 g/ gessr / to /24/N (3 P3Co Radiation Protection Manager Date U Page 1
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~~Fort St. Vrain Nuclear Generating Station Decommissioning Project 4 Release Record - Survey Area Survey Area / Package ID: D4500 Survey Area~~
~~Description:~~
~~Fire Protection System, System 45 Survey Package~~
~~Description:~~
Fire Protection System The primary purpose of the Fire Protection system was to provide a reliable water distribution system for preventing and extinguishing fires both outside the plant buildings and inside the turbine and reactor buildings. Fire Protection was also capable of being used in an emergency as a back-up to the service water and reactor plant cooling water systems in the event that they became incapable of supplying cooling water to the PCRV liner, fuel storage facility and other essential loads in the reactor and turbine plants. In an extreme emergency fire protection served as the final backup to the feedwater system. The Fire Protection System also contained two compressors, a scott air pack recharging container and associated J piping and connections for the emergency breathing air system. This portion of system 45 was used during decommissioning in support of diving and S/G removal activities. Characterization surveys performed in late 1995 indicated several elevated measurement locations. All of these readings were subsequently identified as due to natural radioactivity. The Fire Protection System was surveyed as an Unaffected Survey Unit. Measurement locations are indicated on the attached drawing and location table to designate where sample measurements were collected. Survey Area OperationalIllstory: The Fire Protection System was in operation in its entirety prior to plant shutdown August 18, 1989. The turbine building and outside portions of the Fire Protection System are currently in use and will be used for repowering. l The Fire Protection System had no history of radioactive contamination events. ; i Survey Area Decommissioning and Remediation Activities: ) l No radiological decommissioning or remediation was performed for System 45. l Page 2
Isolation and Control Measures: Level 2 Controls When appropriate, disassembled components were reassembled following survey. If O reassembly was delayed or not performed, component openings were sealed with tape or other appropriate material to maintain isolation control. Portions of this system will remain in use during repower operations. Survey Area
~~Conclusions:~~
The results of total and removable surface activity measurements collected within this survey area meet the criteria for release for unrestricted use. The level of removable H-3 .nd H-3/Fe-55 detected were well below the administrative action level for removable Fe-55 and H-3 activity. Survey Area
~~References:~~
Initial Radiological Site Characterization Report Volumes 1,2, and 11. SD-45, Fire Protection System (90-PF-45-1; 90-PI-45-1 to 45-8; 90-PI-46-2). FSV-FRS-TBD-208, Licensed Material Evaluation at Elevated Plant System Survey Locations Discussion with various PSCo and Westinghouse personnel. O O Page 3
Scientific Ecology Group, Inc. ggg Radiological Engineering & Decommissioning Services -~~ Fort St. Vrain Nuclear Generating Station Decommissioning Project ! Release Record - Survey Unit Survey Package ID: D4500 Location Code: D4500 ZZZZZ DZT01 D4500 ZZZZZ DZE01 D4500 ZZZZZ DZC01 D4500 ZZZZZ DZG01 Group ID Survey Area Number Surface Category Survey Unit Classification D 4500 System Internals DZ ; (Unaffected) j l Survey Reason: T01 - Initial Final Release E01 - Replacement Survey . ( C01 - Characterization Survey G01 - Investigation Survey Survey Unit
~~Description:~~
~~System 45, Fire Protection System~~
~~Survey Design:~~
Measurement Type No. of Measurements Description Beta Scan N/A Scanned vicinity of each total surface activity location where accessible. No areas of elevated licensed activity were identified. Total Surface 42 Collected at designated locations from 21 Activity plant system components, py Smears 31 Collected at designated locations from 21 plant system components. Special Samples 3 II-3/Fe-55 removable activity samples 1 Sediment sample f'} 2 Coupon samples i U i Page 4
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Radiological Engineering & Decommissioning Services Fort St. Vrain Nuclear Generating Station Decommissioning Project Survey Unit Investigations: Investigation No.1 Elevated readings were detected at location 1; measurements 1 and 2 were 3143 and 3593 dpm/100 cm2 respectively. Additionally, target MDAs (i.e.,1250 dpm/100 cm2) were not met for these measurements. However, since activity was detected at approximately twice the MDAs, this was of no consequence. Location 1 was resurveyed by rescarming the location and repeating the measurements using an increased count time in order to confirm the presence of elevated activity. The initial elevated readings were not confirmed. The maximum total surface activity measurement was 749 dpm/100 cm2 . The resurvey MDA was below 1,250 dpm/100 cm2 , Since the initial elevated readings were not confirmed, the data from the initial survey of location 1 was archived and not used as final survey data. The data obtained during the resurvey of location 1 was acceptable as final survey data. O O Page 5
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Investigation No. 2 O V The survey of locations 2 and 8 indicated elevated readings in a range from about 1900 dpm/100 cm2 to 4300 dpm/100 cm2 . In addition, the MDAs for locations 2 and 8 were greater than 1,250 dpm/100 cm 2, but this was of no consequence as activity was detected greater than MDA'. A sediment sample collected at location 2 indicated low levels of Cs-137 (0.166 pCi/g) and Co-60 (0.111 pCi/g). Since this system was not expected to be contaminated, and the very low levels of licensed activities detected did not account for the elevated readings, naturally occurring radioactivity was suspected. An investigation was performed on locations 2 and 8 in accordance with FSV-FRS-TBD-208, Revision 0. First, the area containing the highest activity inside each location was identified. Then the identified area was removed and cut up so that the coupon sample would fit inside the gamma spectroscopy counting shield. The samples were then counted long enough to achieve a Co-60 MDA of about 25 pCi (i.e., about 56 dpm). Non-licensed activity was ! predominant on the coupon samples (e.g., Th-234, Pb-212, etc.). Low level licensed material was identified on the coupon sample from location 8. The total Co-60 activity was 52.8 pCi/100 cm' (117 dpm/100 cm2 ), 1 For location 2, where no licensed material was detected, it was assumed that Co-60, Cs-137 and Eu-152 (the isotopes that contribute to approximately 97% of the licensed activity at FSV) were present at their respective MDAs. For location 8, in addition to the detected Co-60, it was assumed that Cs-137 and Eu-152 (which were not detected) were present at their respective MDAs. The licensed activity fractions for locations 2 and 8 were calculated as 0.0909 and 0.1448, respectively. The actual licensed material MDAs for locations 2 and 8 was based on the sensitivity of the 2 gamma analysis, which was well below 1,250 dpm/100 cm . A naturally occurring background correction value was determined for each applicable measurement by subtracting the conservative estimate of licensed activity from the initial reading. The conservative estimate of licensed activity for locations 2 and 8 ranged from about 170 dpm/100 cm2 to 630 dpm/100 cm'. O l Page 6
Investigation No. 3 Elevated readings in the range of 1300 - 3000 dpm/100 cm2 were detected during the O characterization survey of System 45. An investigation was performed on system 45 characterization locations consisting of three sediment samples and two pipe coupon samples. Neither the sediment or coupon samples indicated the presence of licensed activity. Because the elevated activity was confirmed to be not due to licensed activity, the characterization total surface activity measurements are not used in the final survey database, but remain in the download database. A sufficient number of total surface activity measurements were taken in this system during final survey to meet the survey requirements. Similar elevated readings were also obtained during final survey (see Investigation 2), but were investigated by analying coupon samples from the elevated locations and also determined to be due to non-lice.ased activity (e.g., Th-234, Pb-212, etc.). Investigation No. 4 Elevated readings in the range of 1260 - 1900 dpm/100 cm2 were detected during the initial survey of location 11, therefore an investigation survey was performed for location 11. The , location was scanned and total surface activity measurements were taken. This survey ' 2 confirmed the presence of elevated activity in a range of 1380 to 1480 dpm/100 cm . To be conservative, the highest activity for each measurement location was used as final survey data. The lesser result for each measurement location was deleted from the active final h survey data base. All total surface activity measurements were less than 2000 dpm/100 cm 2 and fewer than ten percent of all total surface activity measurements were greater than 1250 dpm/100 cm2, Investigation No. 5 2 A combined tritium and iron-55 smear taken at location 16 indicated 277 dpm/100 cm (j,e,, j only slightly greater than MDA). Although below the individual measurement action level, only two locations had combined tritium and iron 55 smears taken; therefore, greater than , 10% of the measurements exceeded 250 dpm/100 cm'(i.e.,25% of the maximum GLV of l 1,000 dpm/100 cm2 ), l The backup tritium and iron-55 smear, which was taken adjacent to and at the same time as ; the initial smear of location 16 was analyzed and indicated only 17 dpm/100 cm2 . Additionally, the smear taken at location I was only 77 dpm/100 cm2 . Because the location l 16 removable tritium and iron 55 was not confirmed, no further action was necesssary. All measurements are retained in the active final survey data base. All results are below release criteria. Ol Page 7
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Radiological Engineering & Decommissioning Services ~~~ d Fort St. Vrain Nuclear Generating Station Decommissioning Project Survey Location Summary Survey Measurements Description Location Location Collected Number 1 2 - TSA 6" pipe below V45876-Air Fire Water Pump House 2 - RSA vacuum Survey Area B002 1 - H-3/Fe-55 2 8 - TSA 2.5" Fire Hose Connection (at Yard east of Building 19 . 1 - RSA V-45872) Survey Area B002 1 3 2 - TSA 2.5" Fire Hose Connection (at Yard east of Bldg 19 1 - RSA V-45866) Survey Area B002 4 4 - TSA l' L45113 (Breathing Air Turbine Building level 7 2 - RSA Supply to Control Room) northeast, Survey Area C0054 O 5 3 - TSA 1" L45115 (Breathing Air Turbine Building level 6 1 - RSA Supply to Auxiliary Electric northeast, Survey Area C0023 Room) 6 3 - TSA 1"L45112P-DXX- Breathing Turbine Building level 7 1-RSA Air to 480V Room northeast, Survey Area C0054 7 2 - TSA RH7J5-Hose Reel Reactor Building level 7, ; 2 - RSA column J5, Survey Area F0099 l 8 3 - TSA RHilK2-Hose Reel Reactor Building level 11, 2 - RSA column K2, Survey Area F0130 l l 9 2 - TSA RH5MS-Hose Reel Reactor Building level 5, l 2 - RSA column M5, Survey Area F0071 11 2 - TSA RH6M3-Hose Reel Reactor Building level 6, 2 - RS A column M3, Survey Area F0151 12 2 - TSA TH7E2-Hose Reel Turbine Building level 7, 2 - RSA column E2, Survey Area C0030 13 2 - TSA TH6B6-Hose Reel Turbine Building level 6, 2 - RS A column B6, Survey Area C0022 O Page 10
Survey Measurements Deseription Location Loestion Collected Number 14 2 - TSA Ril10K2-Ilose Reel Reactor Building level 10, 2 - RSA column K2, Survey Area F0ll5 15 2 - TSA Ril2M5-Hose Reel Reactor Building level 2, 2-RSA column MS, Survey Area F0028 16 2 - TSA V46104-PCRV Cooling Water Reactor Building level 5, south 2 - RSA loop 2, bottom head & bottom Survey Area F0062 penetrations firewater inlet valve 17 1- RSA TH6G6-Hose Reel Turbine Building level 6, column G6, Survey Area C0023 18 1 - RSA TH7F6-Hose Reel Turbine Building level 7, column F6, Survey Area C0054 19 1-RSA TH7F6-Hose Reel Turbine Building level 7, column F6, Survey Area C0054 20 1 - RS A TH5G6-Hose Reel Turbine Building level 5, column G6, Survey Area C0013 21 1 - RS A TH5G6-Hose Reel Turbine Building level 5, column G6, Survey Area C0013 Note: Imcation number 10 not used O l l Page 11 s
l Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Sen' ices gg
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g Fort St. Vrain Nuclear Generating Station Decommissioning Project Special Samples i Location Code: D4500 ZZZZZ DZT01 J l Comments: H-3 & Fe-55 activity reported in Net dpm/100 cm2 ! Sediment Sample activity reported in pCi/g i Coupon Sample activity reported in total pCi I Underlined values exceed the critical level l Bold values exceed 250 dpm/100 cm2 Italic values exceed 1,000 dpm/100 cm2 I l Tritium and Iron-55 Removable Activity Samples ' Location Type of Critical Level MDA Activity Number Sample l-1 H-3 5.7 12.5 13.7 (- 16-1 H-3 110.4 226.7 276.5 l ( 16-1 backup Fe-55/H-3 18.9 42.9 17.0 Sediment Samples Licensed 14 c. # Nuclide Critical . Identified Level MDA Activity 2-1 Co-60 5.76E-02 1.19E-01 1.11E-01 Cs-137 7.61E-02 1.55E-01 1.66E-01 Coupon Samples Licensed Location Nuclide Critical Number Identified Level MDA Activity 2-2 None 12.6* 25.8* N/A 8-1 Co-60 20.4 41.6 52.8
~~' Crincal level and MDA reported for Co-60 l~~
l Page 12 )
Compilation of Statistical Summaries _ Total Surface Activity - Beta Survey 32@$ r=.::=::::A Removable Surface Activity - Beta Survey Location Code: D4500TZZZZDZ Medium Codes: B0020, B0023, B1028, B1029, B1030, B1031, B1032, B1033, B1034, B1035, B1036 Comments: Total Surface Activity (TSA) reported in Net dpm/100 cm2 Removable Surface Activity (RSA) reported in Net dpm/100 cm2 TSA RSA Upper Confidence Limit (UCL) Mean 422.5 291.5 2.9 1.4 h Maximum 1,850.0 14.3 Minimum -600.0 -7.2 Standard Deviation 504.2 4.8 Minimum Detectable Activity 1,332.1 47.9 Critical Level 631.3 17.7 Samples Reported 42 31 l Samples Prescribed 42 31 l l l 01 Page 1: ERGS:V2.17.2.a.10.25.96 Page 13 !
I 1 Statistical Sununary Total Surface Activity - Beta Survey g.;g.,. , Location Code: D4500TZ7ZZDZ Survey Reasons: T01 - Initial Final Release, G01 - Investigation, E01 - Replacement Medium Codes: B0020, B0023, B1028, B1029 B1030, B1031, B1032, B1033, B1034, B1035, B1036 Net dpm/100 cm2 l Upper Confidence Limit (UCL) 422.5 l l Mean 291.5 l l Maximum , 1,850.0 l l Minimum -600.0 l l Standard Deviation 504.2 l 5 l Minimum Detectable Activity 1,332.1 l l Critical Level 631.3 l l Sampies Reported 42l
.l Samples Prescribed 42l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 1,250.0 dpm/100 cm2 NO l Flagged (2) l Percent of Samples > 1,250.0 dpm/100 cm2 4.8 l Passed (5) l Number of Samples > 2,500.0 dpm/100 cm2 0 l Passed (6) l l UCL of Mean less than or equal 5,000.0 dpm/100 cm2 YES l Passed 1
(5) 25% Test (6) Single Measurement Test (2) See Investigation Section Page 1:TSADS:V2.10.2.a.8.19.96 Page 14 ;
Plant Systems Corrected Field Activity Values Total Surface Activity - Beta Survey == =~,., -; Location Code: D4500TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # . Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0020 955-1 16-1 180 749.8 350.8 -88.9 T01 16-2 797.0 374.4 177.7 B0023 391-3 1-1 360 514.5 251.1 748 6 E01 1-2 500.6 244.1 __ Z2.1.4 1-3 516.3 252.0 512.7 943-1 2-1 240 1,199.0 588.9 -398.4 T01 478-3 2-3 180 1,210.8 578.9 -195.5 G01 137-3 3-1 240 1,060.2 516.5 __LQ40.0 T01 3-2 1,180.9 576.9 -330.0 950-1 4-1 30 841.1 381.8 342.9 4-2 896.9 409.7 -200.0 4-3 829 4 376.0 257.1 44 896.9 409.7 57.1 5-1 907.6 415.1 -600.0 5-2 841.1 381.8 -257.1 5-3 780.9 351.7 57.1 6-1 875.0 398.8 -257.1 6-2 780.9 351.7 28.6 6-3 755.3 338.9 28.6 1128-1 71 60 1,110.2 518.5 378.4 7-2 1,239.4 583.1 -162.2 31-3 91 1,003.8 466.2 ___500.0 9-2 1.027.6 478.1 394.7 733-3 11 1 120 937.4 452.2 L3IlLO G01 1118-1 11 2 60 906.5 419.4 LR50.0 T01 1108-1 12 1 1,129.9 530.2 -179.5 12-2 1,016.4 473.5 . 794.9 1080-1 13-1 1,183.4 557.8 1.125.0 13-2 1,054.8 493.5 900.0 94-3 14-1 915 0 428.7 -234.0 14-2 778.4 360.3 -85.1 31-3 15-1 1.066.0 497.4 736.8 Page 2:TSABS:V2.10.2.a.8.19.96 Page 15
Q Plant Systems Corrected Field Activity Values - p.Sbb5 'q'> Total Surface Activity - Beta Survey ram, Location Code: D4500TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0023 31-3 15-2 60 995.7 462.2 447.4 T01 i B1028 482-3 2-7 360 1,145.8 562.1 291.3 G01 h l (G B1029 943-1 2-2 240 1,120.1 SEJ.5 200.1 T01 B1030 482-3 2-8 360 1.272.1 625.3 178.3 G01 Page 3:TSABS:V2.10.2.a.8.19.96 Page 16
1 Plant Systems Corrected Field Activity Values t
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~~Total Surfa- e Activity - Beta Survey EM5F@ '~~
~~;,. a.di Location Code: D4500TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level.~~
Bold values exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # . Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B1031 506-3 2-4 360 1,201.8 589.6 183.3 G01 B1032 2-5 1,201.8 589.6 171.3 O B1033 562-3 2-6 1.279.7 628.0 220.1 B1034 196-3 8-1 60 1,332.1 631.3 505.2 T01 O Page 4:TSABS:V2.10.2.a.8.19.96 Page 17
l , Plant Systems Corrected Field Activity Values r== ( Total Surface Activity - Beta Survey I i,.BM@@ ' a.g.-, location Code: D4500TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level.
~~Bold values exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 Count time reported in seconds.~~
Medium Download # IAcation ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B1035 196-3 8-2 60 1,244.5 587.5 379.4 T01 B1036 386-3 8-3 180 787.5 378.2 624.3 G01 O G' l 1 1 Page 5:TSABS:V2.10.2.a.8.19.96 Page 18
Graph of Activity versus Location Series t-Total Surface Activity - Beta Survey l _Ed@S g.2mys , Location Code: D4500TZZZZDZ Survey Reasons: T01 - Initial Final Release, G01 - Investigation, E01 - Replacement i Medium Codes: B0020, B0023, B1028, B1029, B1030, B1031, B1032, B1033, B1034, B1035, B1036 Average Guideline Value 5000.0 dpm/100 cm' 2500l 4 l 2000l-- t -- - - ---- - -- -- --------------- ---- - - ---------- e 1500------- -- ----------- --- - - --- - ------- ----------- -- x ? l i w.,*-*-* '"\;'"\ p I' f 1000--- - -- - - ---- - -- - [---*^ "'E m . ,,* -"3~ A-- / -
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3 4 83-1h-24-1' 2 43 2 6- 2 2 11 1 1h.1' 1'}-1 14 1 15 6-12 21 2-3 25 2-7 6-1 5-3 6-2 71 61 6-3 92 11 2 12-2 13-2 14 2 15-2 16-2 Location Series
--- Criticallevel -.- MDA --- Average Guideline Value (off-scale) -.- Activity Page 6:TSABS:V2.10.2.a.8.19.96 Page 19
~~Background Correction Values Total Surface Activity - Eeta Survey g ,~~
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~~Location Code: D4500TZZZZDZ~~
~~Comments: Field Background (Bkg) reponed in epm / detector area. :~~
Medium Bkg reported in dpm/100 cm2 l Count time reported in seconds. ! Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0020 955-1 16-1 02000 180 TM001 24.0 0.0 T01 16-2 27.3 1 i I 80023 391-3 1-1 02100 360 94.3 E01 O 1-2 13 89.2 'Q 943-1 2-1 02311 240 95.0 262.5 T01 478-3 2-3 02000 180 54.0 G01 137-3 3-1 02311 240 123.3 T01 3-2 153.8 950-1 4-1 02301 30 66.0 4-2 76.0 4-3 64.0 4-4 76.0 5-1 78 0 5-2 66.0 5-3 56.0 6-1 72.0 6-2 56.0 6-3 52.0 1128-1 71 02302 60 68.0 7-2 86.0 31 3 91 50.0 9-2 61.0 733-3 11-1 120 127.0 G01 1118-1 11-2 60 52.0 T01 1108-1 12-1 79.0 12-2 63.0 1080-1 13-1 92.0 O 13-2 72.0 C 94-3 14-1 14-2 75.0 53.0 31-3 15-1 66.0 Page 7:TSABS:V2.10.2.a.8.19.96 Page 20
Background Correction Values i-Total Surface Activity - Beta Survey l NErdM i.y. m cs Location Code: D4500TZZZZDZ Comments: Field Background (Bkg) reponed in epm / detector area. Medium Bkg reponed in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code 80023 31-3 15-2 02302 60 TM001 57.0 0.0 T01 B1028 482- 2-7 02311 360 154.5 2,915.0 G01 O B1029 943-1 2-2 240 228.5 2,003.0 T01 B1030 482-3 2-8 360 191.2 1,782.0 G01 O Page 8:TSABS:V2.10.2.a.8.19.96 Page 21
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i Location Code: D4500TZZZZDZ Comments: Field Background (Bkg) reported in epm / detector area. Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B1031 506-3 2-4 02311 360 TM001 154.2 1,825.0 G01 B1032 2-5 154.2 1,712.0 ) O B1033 562-3 2-6 157.8 2,201.0 B1034 196-3 8-1 02302 60 112.0 2,982.0 T01 Page 9:TSABS:V2.10.2.a.8.19.96 i Page 22
Background Correction Values Total Surface Activity - Beta Survey
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g.;a,y Location Code: D4500TZZZZDZ Comments: Field Background (Bkg) reported in epm / detector area. Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B1035 196-3 8-2 02302 60 TM001 97.0 2,236.0 T01 B1036 386-3 8-3 180 66.7 3,686.0 G01 O Page 10:TSABS:V2.10.2.a 8.19.96 Page 23
i i i l O Summary of Efficiency Values - V Total Surface Activity - Beta Survey ISdI!fd
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Location Code: D4500TZZZZDZ Survey Reasons: T01 - Initial Final Release, G01 - Investigation, E01 - Replacement Comments: Detector Detector Download # Efficiency Model Serial Number -Station # LMI 43-94/100 PR124110 31-3 0.038 LMI 43-94/100 PR124114 94-3 0.047 LMI 43-98/300 PR123601 137-3 0.025 LMI 43-94/100 PR124110 196-3 0.039 LMI 43-94/100 PR119460 386-3 0.029 SEG SP-175-3M PR024349 391-3 0.079 LMI 44-408 PR092644 478-3 0.110 LMI 43-98/300 PR117961 482-3 0.021 LMI 43-98/300 PR117961 506-3 0.020 l LMI 43-98/300 PR123601 562-3 0.019 ! V LMI 43-94/100 LMI 43-98/300 PR124110 733-3 . 0.041 PR123601 943-1 0.032 LMI 43-94P100 PR124111 950-1 0.070 LMI 44-408 PR094981 955-1 0.121 LMI 43-94/100 PR124111 1080-1 0.040 LMI 43-94/100 PR124111 1108-1 0.039 LMI 43-94/100 PR124111 1118-1 0.040 LMI 43-94/100 PR124110 1128-1 0.037 (~~. V Page 11:TSABS:V2.10.2.a.8.19.96 Page 24
~ - Survey Detection Equipment Used l Total Surface Activity - Beta Survey g.a =,.,,,,, a Location Code: D4500TZ7.ZZDZ Survey Reasons: T01 - Initial Final Release, G01 - Investigation, E01 - Replacement l Medium Codes: B0020, B0023, B1028, B1029, B1030, B1031 B1032, B1033, B1034 B1035 B1036 Download # - Survey User ID M2350 S/N Detector Station Id S/N 31-3 DAB 9854/126212 126212 PR124110 94-3 DAB 9854/126218 126218 PR124114 137-3 DTS6208/126182 126182 PR123601 196-3 LCF0451//126212 126212 386-3 PR124110 g ELS8308/117566 117566 PR119460 391-3 AOK2982/126212 126212 PR024349 478-3 VMB6153/95361 95361 PR092644 482-3 AOK2982/95361 95361 PR117961 506-3 AOK2982/126179 126179 PR117961 562-3 DPS4133/126179 126179 PR123601 733-3 DPS4133/95361 95361 PR124110 943-1 RLN4080/126192 126192 PR123601 950-1 JMS1149/117578 117578 PR124111 955-1 RLN4080/98642 98642 PR094981 1080-1 LCF0451/98620 98620 PR124111 1108-1 JMS1149/98620 98620 PR124111 1118-1 JMS1149/98620 98620 PR124111 1128-1 DTS6208/98642 98642 PR124110 Program Version: V2.10.2.a.8.19.96 Report Printed At: 10:59:05 AM on 08/27/96 g Total Pages: 12 Page 12:TSABS:V2.10.2.a.8.19.96 Page 25
i Statistical Summary Removable Surfr Activity - Beta Survey g f.am , Location Code: D4500TZZZZDZ : Survey Reasons: C01 - Characterization, T01 - Initial Final Release ; Medium Codes: B0020, B0023 i Net dpm/100 cm2 l Upper Confidence Limit (UCL) 2.Sil l Mean 1.4 l l Maximum 14.3 l j l Minimum -7.2 l l Standard Deviation 4.8 l O- l Minimum Detectable Activity 47.9 l l Critical Level 17.7 l l Samples Reported 31 l l Samples Prescribed 31 l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 250.0 dpm/100 cm2 YES l Passed l Percent of Samples > 250.0 dpm/100 cm2 0.0 l Passed (3) l Number of Samples > 500.0 dpm/100 cm2 0 l Passed (4) l UCL of Mean less than or equal 1,000.0 dpm/100 cm2 YES l Passed l l (3) 10% Test (4) Single Measurement Test i Page 1:RSABS:V2.8.3.a.6.12.96 Page 26 i
Plant Systems Corrected Field Activity Values Removable Surface Activity - Beta Survey
~~-fSM55 g = .-m Location Code: D4500TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level.~~
Bold values exceed 250.0 dpm/100 cm2 Italic values exceed 1,000.0 dpm/100 cm2 Medium RC# Location ID - MDA Critical Activity Reason Code Location # Level Code B0020 26.12539 16-1 24.0 8.8 3.0 T01 26.12540 16-2 24.0 8.8 -6.2 B0023 26.12513 1-1 25.2 9.5 2.1 26.12514 1-2 25.2 9.5 -7.2 26.12511 2-1 25.2 9.5 4.4 26.21312 3-1 19.5 6.6 1.2 26.12535 4-1 39.9 14.7 -2.7 26.12536 4-2 39.9 14.7 -6.6 26.12537 5-1 47.9 17.7 1.4 26.12538 6-1 47.9 17.7 -3.2 26.22954 7-1 24.3 9.0 2.8 26.22955 7-2 24.3 9.0 2.8 26.22379 8-1 19.0 6.4 3.7 26.22380 8-2 19.0 6.4 8.3 26.19281 9-1 21.5 7.6 2.3 26.19282 9-2 21.5 7.6 2.3 26.16E69 11-1 20.7 7.2 _. 14.3 26.16670 11-2 20.7 7.2 2.8 26.16667 12-1 20.7 7.2 0.5 26.16668 12-2 20.7 7.2 -1.9 26.22956 13-1 24.3 9.0 0.5 26.22957 13 2 24.3 9.0 5.1 26.20802 14-1 24.3 9.0 -4.2 26.20803 14-2 24.3 9.0 -4.2 26.19279 15-1 21.5 7.6 0.0 26.19280 15-2 21.5 7.6 2.3 26.07379 17-1 19.0 6.4 6.0 C01 26.07798 18-1 24.6 9.2 0.2 26.07799 19-1 24.6 9.2 J 26.07800 20-1 24.6 9.2 2.5 26.07801 21-1 24.6 9.2 7.2 Page 2:RSABS:V2.8.3.a.6.12.96 Page 27
I l Graph of Activity versus Locatien Series Removable Surface Activity - Beta Survey =d$$ E
,gyg, Location Code: D4500TZZZZDZ l Survey Reasons: C01 - Characterization, T01 - Initial Final Release i
I Medium Codes: B0020, B0023 ! Guideline Value 1000.0 dpm/100 cm8 275 l 1 l 225-- - - - - - - - - ---- -
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Page 28 l l
Laboratory Equipment Used Removable Surface Activity - Beta Survey g gra -m Location Code: D4500TZZZZDZ Survey Reasons: C01 - Characterization, T01 - Initial Final Release Medimn Codes: B0020, B0023 Location Range Survey User ID Laboratory Serial Equipment Number 8-1 to 8-2 BJB1396 LB-5100W SN5100W 14-1 to 14-2 DAB 9854 LB-5100W SN5100W 9-1 to 9-2 DLB6373 LB-5100W SN5100W 15-1 to 15-2 1-1 to 3-1 1-2 DLB6373 DTS6208 DTS6208 LB-5100W LB-5100W SN5100W SN5100W $ LB-5100W SN5100W 7-1 to 7-2 DTS6208 LB-5100W SN5100W 13-1 to 13-2 DTS6208 LB-5100W SN5100W 2-1 JMS1149 LB-5100W SN5100W 17-1 KDE9135 LB-5100W SN5100W 18-1 KDE9135 LB-5100W SN5100W 19-1 KDE9135 LB-5100W SN5100W 241 KDE9135 LB-5100W SN5100W 21-1 KDE9135 LB-5100W SN5100W i 4-1 to 4-2 RLN4080 LB-5100W SN5100W 5-1 RLN4080 LB-5100W SN5100W 6-1 RLN4080 LB-5100W SN5100W 11-1 to 11-2 RLN4080 LB-5100W SN5100W 12-1 to 12-2 RLN4080 LB-5100W SN5100W 16-1 to 16-2 RLN4080 LB-5100W SN5100W 1 Program Version: V2.8.3.a.6.12.96 ' Report Printed At: 08:03:12 AM on 06/27/96 g Total Pages: 4 Page 4:RSABS:V2.8.3.a.6.12.96 Page 29
Scientific Ecology Gro'ap, Inc. Radiological Engineering & Decommissioning Services fg
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g Fort St. Vrain Nuclear Generating Station Decommissiuning Project Release Record Contents Survey Area Survey Area ID: Survey Area Description Pages D4700 Purification Cooling Wata System, System 47 2-3 ; 1 1 Survey Unit (s) l Location Code Survey Unit Description Pages J Purification Cooling Water System 4-28 O I 2 l Prepared By: M,/Och U / /o-2 P 96 SEG Radiddical Engineer Date ! Reviewed By: U / d / "['76 SEG Pedject Radiation Protection Manager Date Approved By: . d At E y 4,asr / o /ee/ft PSCo Radiation Protection Manager Date O G Page 1
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Scientific Ecology Group, Inc. ~g Radiological Engineering & Decommissioning Services ~~~ 3 Fort St. Vrain Nuclear Generating Station Decommissioning Project (G Release Record - Survey Area Survey Area / Package ID: D4700 Survey Area
~~Description:~~
~~Purification Cooling Water System, System #47 Survey Package~~
~~Description:~~
Purification Cooling Water System The Purification Cooling Water System provided cooling water to five heat exchangers in the helium purification system (System 23). System 47 contained no filtration, demineralization, or chemical addition capabilities for water chemistry control. Water make-up was via the Reactor Plant Cooling Water System (System 46) or from the condensate system. The Purification Cooling Water System was surveyed as an Affected System. Measurement locations were marked on maps to designate where sample measurements were collected. Survey Area OperationalIIIstory: The Purification Cooling Water System was in operation prior to plant shutdown August 13, 1989. This system was often operated in tandem with System 46 (an affected system); therefore, the Purification Cooling Water System was also surveyed as an affected system. Survey Area Decommissioning and Remediation Activities: No radiological decommissioning or remediation was performed for System 47. All equipment items remain in place (the System 23 coolers were removed as part of System 23 removal). Isolation and Control Measuits: Level 2 Controls When appropriate, disassembled components were reassembled following survey. If reassembly was delayed or not performed, component openings were sealed with tape or other appropriate material to maintain isolation control. This system has been abandoned in place. Survey Area
~~Conclusions:~~
The results of total and removable surface activity measurements collected within this Survey Area meet the criteria for release for unrestricted use. The results of removable H-3 and removable H-3/Fe-55 surface activity were less than Minimum Detectable Activities. V 1 Page 2
i , 1 Survey Area
~~References:~~
Initial Radiological Site Characterization Report volumes 1,2 and 12. g' System Description (SD-47) Purification Cooling Water System PI-47 ,' Discussion with PSCo and Westinghouse Team personnel C O O Page 3
I l l l Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Services === l Fort St. Vrain Nuclear Generating Station Decommissioning Project l Release Record - Survey Unit Location Code: D4700 ZZZZZ EZT01 Group ID Survey Area Number Surface Category Survey Unit Classifleation D 4700 System Interrals EZ , (Affected) Survey Reason: T01 - Initial Final Release E01 - Replacement Survey Survey Unit
~~Description:~~
~~Purification Cooling Water System Su vey Design: Measurement Type No. of Measurements Description~~
i
' Beta Scan N/A Scanned accessible surface at each total surface activity location. , No areas of elevated activity were identified. j 1 Total Surface 87 Collected total surface activity measurements at Activky designated locations from 34 plant system components.
~~py Smears 50 Collected smears at designated locations from 34 l plant system components.~~
]
Special Samples 3 Collected one distilled tritium removable activity smear sample at locatior. I and two tritium / iron-55 removable activity smear samples at locations 19 and 28. l 1 I i '% i(V 1 i Page 4 1 l
Scientific Ecology Group, Inc. Radiolog! cal Engineering & Decommissioning Services === g Fort St. Vrain Nuclear Generating Station Decommissioning Project Survey Unit Investigations: Investigation No. 1 07/01/96 Measurement #2 of location #10 indicated an elevated reading of approximately 5.2 k dpm/100 cm'. This location is a 1.5 outlet line from the Regeneration Compressor Water Cooler (E-2309). E-2309 was removed during decommissioning as part of removal of System 23, Helium Purification System. An investigation was performed by evaluating all survey results from package D4700. The other measurement taken at location #10 was below the action level (which was taken downstream of the first measurement). Additionally, the inlet line to E-2309 and inlet and outlet lines to other coolers in the system were surveyed during the initial final survey of this system. Because the elevated measurement was bounded and other similar locations in the system were surveyed by the initial final survey, additional measurements were not required. This reading was below the individual measurement GLV for affected plant systems (i.e.,12,000 dpm/100 cm2 ) and the survey unit average was well below the average GLV (i.e., 4,000 dpm/100 cm2 ); therefore, no further action was necessary. The initial final survey measurements from location #10 are retained in the database since measurement results are within the individual and average GLVs for affected plant systems. g Investigation No. 2 07/01/96 The Minimal Detectable Activity measured at locations 11,12,28 and 29 exceeded the targeted MDA of 3,000 dpm/100 cm2 A Replacement Survey for total surface activity was performed under location code D4700 ZZZZZ EZE01. A longer count time of 6 minutes was used. The measurement results obtained from the Replacement Survey replaced the results of the Initial Final Survey for survey location 11,12,28 and 29. Investigation No. 3 07/01/96 The detector parameters changed during the download process of location 6, invalidating the download (download report 85). A Replacement Survey for total surface activity was performed under location code D4700 ZZZZZ EZE01. The measurement results obtained from the Replacement Survey replaced the results of the Initial Final Survey for survey location 6. g Page 5
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Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Services gg
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Fort St. Vrain Nuclear Generating Station Decommissioning Project g Survey Location Summary t Description Location Number CdI 1 3 - TSA T-4701, Purification Cooling Reactor Building, Izvel 11 3 - RSA Water Expansion Tank Mc7.zanine, Survey Area F146 1 - H-3 2 3 - TSA T-4702, Purification Cooling Reactor Building, Level 11 3 - RSA Water Expansion Tank Mezzanine, Survey Area F146 3 3 - TSA E-4701, Purification Cooling Reactor Building, Ixvel 2, 3 - RSA Water Heat Exchanger Survey Area F033 4 3 - TSA E-4702, Purification Cooling Reactor Building, Izvel 2, 3 - RSA Water Heat Exchanger Survey Area F033 5 3 - TSA 3/4" Drain Line L4779-D21 Reactor Building, Level 2, 3 - RSA from E-4701 Survey Area F033 6 2 - TS A 1" Drain Line L4770-D21 from Reactor Building, Level 1, 1-RSA pump suction of P-4702 Survey Area F019 7 2 - TSA 1.5" Inlet line to Regeneration Reactor Building, I2 vel 10, 1 - RSA Cooler E-2305 Survey Area F121 8 2 - TSA 1.5" Outlet line from Reactor Building, II vel 10, 1 - RSA Regeneration Cooler E-2305 Survey Area F121 9 1.5" Inlet line to Regeneration Reactor Building, level 10, 2 - TSA Compressor Water Cooler Survey Area F121 1 - RSA E-2309
' 1.5" Outlet line from Reactor Building, level 10, 2 - TSA Regeneration Compressor Water Survey Area F121 1 - RSA Cooler E-2309 11 4 - TSA 2.5" Inlet line to Helium Reactor Building, level 10, 1 - RSA Purification Cooler E-2302 Survey Area F120 12 4 - TSA 2.5" Outlet line from Helium Reactor Building, Level 10, 1 - RSA Purification Cooler E-2302 Survey Area F120 13 4 - TSA 1" Inlet line to Purified Helium Reactor Building, Ievel 10, 1-FSA Cooler E-2308 __
Survey Area F113 O Page 7
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I laa Description Location Niunber ; 14 4 - TSA l' Outlet line from Purified Reactor Building, Izvel 10, ! 1 - RSA Helium Cooler E-2308 Survey Area F113 l 15 6 - TSA 2.5" Inlet line to Helium Reactor Building, level 10, 2 - RSA Purification Cooler E-2301 Survey Area Fil6 16 6 - TSA 2.5" Outlet line from Helium Reactor Building, Izvel 10, 2 - RSA Purification Cooler E-2301 Survey Area F116 17 1 - TSA 1.5" Cross Connect to System Reactor Building, Izvel 10, 1 - RSA 46 Survey Area Fil6 t 18 2 - TSA 3/4" Line L4784-D13,120p Reactor Building, level 10, f 2 - RSA Cross Connect Survey Area F121 19 2-TSA 3/4" Line L4785-D13, loop Reactor Building, Level 10, f 2 - RSA Cross Connect Survey Area F121 l 1 - H-3/Fe-55 20 5 - TSA 2" Line L4763-D21. T-4701 Reactor Building, Izvel 11 1 - RSA Relief Line Mezzanine, Survey Area F145 21 5 - TSA 2" Line L4764-D21. T-4702 Reactor Building, Level 11 1 - RSA Relief Line Mezzanine, Survey Area F145 22 , _ ggg 1/2" Une MDS, NM1 Mr Bundkg, M 11, Helium Blanket Supply Survey Area F130 23 ' '
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1 - RSA Helium Blanket Supply Survey Area F130 24 2 - TSA 3/4" Line L4767-D13, T-4701 Reactor Building, Level 10, 2 - RSA Surge Line Survey Area Fil5
25 2 - TSA 3/4" Line L4768-D13, T-4702 Reactor Building, Ixvel 10, 2 - RSA Surge Line Survey Area Fil5 26 1 - TSA 3/4" Line downsh~am V47124 Reactor Building, level 1, 1 j 1 - RSA Survey Area F019

- 27 1 - TSA 3/4" Line downstream V47125 Reactor Building, Level 1, 1 - RSA Survey Area F019 28 4 - TSA 3" Line L4758-D13, pump Reactor Building, level 1,
~~, 1 - RSA suction to P-4701 Survey Area F019 i 1 - H-3/Fe-55~~
i. 29 4 - TSA 3" Line L4704-D13, pump Reactor Building, Level 1, 1 - RSA suaion to P-4701 Survey Area F019 O !
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Location L at on CI Description Number 30 1 - TSA Valve V4711, Cross Connect to Reactor Building, level 1, 1 - RS A System 46 Survey Area F019 31 1 - TSA Valve V4776, Cross Connect to Reactor Building, level 1, 1 - RS A System 46 S t:vey Area F019 32 1 - TSA Valve V47101, Cross Connect to Reactor Building, Level 1, 1 - RSA emergency condensate Survey Area F019 33 1 - TSA Valve V47102, Cross Connect to Reactor Building, level 1, 1 - RS A emergency condensate Survey Area F024 34 1 - TS A Valve V4731. E-2302 return Reactor Building, level 1, 1 - RSA loop relief Survey Area F120 l
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l Scientific Ecology Group, Inc. gg , Radiological Engineering & Decommissioning Services ==== l Fort St. Vrain Nuclear Generating Station Decommissioning Project i Special Samples , ) 1 Location Code: D4700 ZZZZZ EZT01 Comments: H-3 and H-3/Fe-55 activity reported in Net dpm/100 cm2 l Underlined values exceed the critical level Bold values exceed 30,000 dpm/100 cm2 Italic values exceed 40,000 dpm/100 cm2 l ! Tritium Removable Activity Sample Location # Type of Sample Critical Level MDA Activity 1-1 H-3 115.0 235.9 9.8 i Tritium / Iron-55 Removable Activity Samples
O Location # Type of Sample Critical Level MDA Activity 19-1 H-3/Fe-55 13.2 29.7 28.6 l 28-1 H-3/Fe-55 13.2 29.8 12.9 l
l 4 l l 4 l O Page 10
i Compilation of Statistical Summaries Total Surface Activity - Beta Survey N25$
. = =12::. ::r Removable Surface Activity - Beta Survey Location Code: D4700TZZZZEZ Medium Codes: B0019, B0020, B0023, B0037 Comments: Total Surface Activity (TSA) reported in Net dpm/100 cm2 Removable Surface Activity (RSA) reported in Net dpm/100 cm2 TSA RSA Upper Confidence Limit (UCL)
Mean 330.6 201.0 4.0 2.6 g Maximum 5,219.5 32.4 Minimum -616.3 -5.3 Standard Deviation 723.6 6.3 Minimum Detectable Activity 1,639.5 24.9 Critical Level 813.3 9.3 Samples Reported 87 50 l Samples Prescribed 87 50 0 Page 1: ERGS:V2.9.1.b.6.28.96 Page 11
i ( Statistical Summary gg ( Total Surface Activity - Beta Survey i.amg l Location Code: D4700TZZZZEZ l l Servey Reasons: E01 - Replacement, T01 - Initial Final Release Medium Codes: B0019, B0020, B0023, B0037 I Net dpm/100 cm2 l Upper Confidence Limit (UCL) 330.6 l l Mean 201.0 l l Maximum 5,219.5 l i l Minimum -616.3 l , g l Standard Deviation 723.6 l V l Minimum Detectable Activity 1,639.5 l l l Critical Level 813.3 l . l Samples Reported 87l l l Samples Prescribed 87l i Tests Performed i l Samples Reported greater than or equal to Samples Prescribed YES l Passed ; l MDA < 3,000.0 dpm/100 cm2 YES l Passed l Percent of Samples > 3,000.0 dpm/100 cm2 1.1 l Passed (3) l Number of Samples > 4,000.0 dpm/100 cm2 1 l Flagged (40) , l UCL of Mean less than or equal 4,000.0 dpm/100 cm2 YES l Passed ) l Number of Samples > 12,000.0 dpm/100 cm2 0 l Passed (44) (3) 10% Test (40) Single Measurement Test, See Investigation Section ] (44) Single Measurement Test
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Plant Systems Corrected Field Activity Values r== Total Surface Activity - Beta Survey l EM tr.=r.:.a Location Code: D4700TZZZZEZ Comments: Activity (net) MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 3,000.0 dpm/100 cm2 Italic values exceed 4,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0019 365-3 1-1 15 841.8 392.7 -103.9 T01 1-2 760.2 351.9 -187.0 1-3 876.7 410.2 -249.4 2-1 823.7 383.7 394.8 2-2 746.8 345.2 -20.8 2-3 847.7 395.7 249.4 B0020 139-3 30-1 180 1.076.3 511.9 -58.1 78-3 31-1 902.1 425.5 490.5 32-1 1.024.6 486.7 -188.6 139-3 33-1 1,531.0 739.2 -310.0 34-1 1,035.9 491.7 1.976.2 B0023 1189-1 5-1 60 575.6 266.3 0.0 5-2 638.4 297.7 -158.7 5-3 554.7 255.8 47.6 134-3 6-1 689.6 325.1 -58.0 E01 6-2 653.6 307.2 217.4 131 3 71 868.5 401.2 -170.7 T01 7-2 052.4 443.2 -243.9 8-1 852.3 393.1 146.3 8-2 727.8 330.9 146.3 9-1 835.8 384.8 0.0 9.2 884.4 409.2 146.3 10-1 747.0 340.4 1.146.3 10-2 810.2 372.1 5.219.5 1213-1 11-1 360 1.056.4 521.2 625.0 E01 11-2 1,051.3 518.6 -46.9 11-3 1.031.9 508.9 208.3 11-4 997.6 491.7 317.7 12-1 1,085.6 535.7 562.5 12-2 1,056.1 521.0 135.4 12-3 1.054.2 520.0 -536.5 Page 2:TSABS:V2.9.1.b.6.28.96 Page 13
Plant Systems Corrected Field Activity Values - (m L>
)
Total Surface Activity - Beta Survey R gy=EL3LE = Location Code: D4700TZZZZEZ ; Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 3,000.0 dpm/100 cm2 Italic values exceed 4,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code
B0023 1213-1 12-4 360 1,065.4 525.6 -447.9 E01 134-3 13-1 60 713.6 337 2 -43.5 T01 13-2 703.4 332.1 58.0 13-3 686.1 323.4 202.9 13-4 723.6 342.2 -29.0 14-1 696.5 328.6 87.0 !
14-2 710.2 335.5 -14.5 14-3 723.6 342.2 29.0 144 675.4 318.1 115.9 . 1219-1 15-1 120 1,462.2 713.3 1.078.9 ' 15-2 1,433.0 698.7 276.3 i 15-3 1,506.2 735.3 -526.3 J (A 8 15-4 15-5 1,410.1 1,357.2 687.2 660.8
~~-144.7 315.8 l~~
l 15-6 1,367.1 665.7 1.092.1 16-1 1,457.0 710.7 539.5 16-2 1,487.0 725.7 -105.3 16-3 1,396.4 680.3 ,.j .052.6 16-4 1,544.0 754.2 -513.2 16-5 1,510.0 737.2 39.5 16-6 1,474.0 719.2 513.2 69-3 17 1 60 1,074.7 504.3 -97.6 1212-1 18-1 529.7 244.5 -90.1 18-2 554.1 256.7 -165.2 i 19-1 524.7 242.0 45.0 l 19-2 581.8 270.6 -165.2 l 397-3 20-1 120 1,013.1 489.2 307.7 I 20-2 1,055.8 510.5 -89.7 l 20-3 981.7 473.5 589.7 20-4 1,045.3 505.3 -205.1 20-5 994.7 480.0 230.8 399-3 21-1 952.8 460.7 511.6 21-2 1,018.8 493.6 209.3 21 3 928.7 448.6 267.4 21-4 974.8 471.6 -616.3 21-5 999.3 483.9 -616.3 ( ( 1226-1 24-1 24 2 60 773.9 683.8 365.1 320.1
~~-241.5 177.1 25-1 734.4 345 4 -370.4 25-2 773.9 365.1 16.1 Page 3:TSABS:V2.9.1.b.6.28.96 Page 14~~
~~1 l~~
~~~;==~~
Plant Systems Corrected Field Activity Values l Total Surface Activity - Beta Survey MEM2 g= m i Location Code: D4700TZZZZEZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 3,000.0 dpm/100 cm2 Italic values exceed 4,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # . Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0023 82-3 26-1 60 872.6 415.1 516.4 T01 27-1 1,013.9 485.7 -579.0 1211-1 28-1 360 1,639.5 813.3 1.261.9 E01 28-2 1,536.0 761.6 -552.4 28-3 1,363.5 675.3 781.0 28-4 1,507.1 747.1 1.376.2 29-1 1,460.2 723.6 676.2 29-2 1,420.3 703.7 757.1 29-3 1,355.1 671.1 300.0 29-4 1,226.0 606.6 _BD93 B0037 132-3 3-1 15 649.7 294.9 176.6 T01 3-2 552.3 246.2 353.1 3-3 562.8 251.5 110.3 4-1 667.3 303.7 44.1 4-2 692.8 316.5 -110.3 4-3 756.2 348.2 44.1 O Page 4:TSABS:V2.9.1.b.6.28.96 Page 15
Graph of Activity versus Location Series Total Surface Activity - Beta Survey I=d@$ l Location Code: D4700TZZZZEZ Survey Reasons: E01 - Replacement, T01 - Initial Final Release Medium Codes: B0019, B0020, B0023, B0037 Average Guideline Value 4000.0 dpm/100 cm' 5500 o i 5000-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ------------------------------------ l 4500-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ----------------------------------- 4000- .4 -
- - -+- - - - - -----------:--- -*w------
3500-------- -- -------------------- - ----------------------- ----------- 3000-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ---------------------------------- 2500------- ------------------------ - ----------------------------------
~~, 2000-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -~~
~~1500- --~~~-------- - ------ ------ -~~
------------------- g a g ;aaft 1000- - - - - - - - - - - - - - - - - - - -- -- -- -#**+"'*---------- ----- ' -- --- "w'"* ,% ~ ,. [ "v* ... % .. #.
~~500 -~~
,y g: *~* - - -E- - 7 g3 - f - - -+ N _- _----- - -- \- - - -/- *3 0
~~n / " a _ p - _; A j' \.P'., , _ y[,\ ? ' a~~
.i . . . 8 \,,=(=3-" 9 ./ y . -500--------------------------------------- e*--------------e--------e- -1000 ' ' ''''''''''''''''''! ' ' i ! ' ' ' ' ' ! I ' ' ! ! ! ' I 'id' '%d ' ' ' 'hi ' Liit'ki Li il if ti ki Li 1631'id 1'iJ 1'2d 1'2J tid 1W ikd i4J ii2 iSJ s'sd 163 id 14 21 24 34 +1 44 6-2 &1 7-1 41 41 1&1 11-1 114 12-1 124 13-1 153 14-1 144 16-1 154 15-6 16-1 1&3 16-6 Location Series ---- Critical level -.- MDA Average Guideline Value -.- Activity )
Page 5:TSABS:V2.9.1.b.6.28.96 Page 16
Graph of Activity versus location Series
~~-f$d@@~~
Total Surface Activity - Beta Survey , - = , = Location Code: D4700TZZZZEZ Survey Reasons: E01 - Replacement, T01 - Initial Final Release 4 Medium Codes: B0019, B0020, B0023, B0037 Average Guideline Value 4000.0 dpm/100 cm' 4000 , =,- , , , e === -
==
i 3500- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3000 - ------ --- ---- ---------------- ----------------- ---------------- 2500- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2000-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - , G.l 8 1500a .----------------------- ------ -------- - -s u -- ------ u - 1000-----4 ------- =* v % e y - ----- -- - -------
~~-k 3~~
~~500---a~~
\ = * = = =,- -f n v. ---es s ,u ------\
~~m m 7* h ' 0~~
~~; \ ~:#/\/~~
~~k -a, */ N-i e \/~~
/ ---- 7 \ * \ ./ ./ s, -500- - - - - - - - - - - - - - - - - - - - - - - - - - - - , _ , - - - - - - - - - - - - --------------------- -1000 !l ! l l ! !!arl rul--4 ! ; r!i s, !!!'!
~~l 254,~~
~~' ; : j 2s.2 ru l a!2,,~~
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~~} r'u gl s1 s>i in ,57i,,,sS2l iva , 25-5, 2+2,(2s-2l27.$~~
~~Location Series~~
~~---- Critical Level --.- MDA --*- Average Guideline Value -.- Activity 9~~
Page 6:TSABS:V2.9.1.b.6.28.96 Page 17
1 v Background Correction Values Total Surface Activity - Beta Survey g
~~.9 ;am_~~
Location Code: D4700TZZZZEZ Comments: Field Background (Bkg) reponed in epm / detector area. Medium Bkg reponed in dpm/100 cm2 Count time reponed in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0019 365-3 1-1 02203 15 TM001 264.0 0.0 T01 1-2 212.0 l 1-3 288.0 l l 2-1 252.0 2-2 204.0 2-3 268.0 B0020 139-3 30-1 02000 180 TS001 43.0 A 78-3 31-1 31.3 Q 139-3 32-1 33-1 41.0 89.7 34-1 39.7 B0023 1189-1 5-1 02300 60 TM001 52.0 5-2 65.0 5-3 48.0 ' 134-3 6-1 02301 93.0 E01 6-2 83.0 131-3 7-1 02302 50.0 T01 7-2 61.0 ' 8-1 48.0 8-2 34.0 9-1 46.0 9-2 52.0 10-1 36.0 10-2 43.0 1213-1 11-1 02311 360 308.3 E01 11-2 305.3 , 11-3 294.0 p 11-4 274.5 (' 12-1 12-2 325.8 308.2 12-3 307.0 Page 7:TSABS:V2.9.1.b.6.28.% . Page 18
n Background Correction Values - Total Surface Activity - Beta Survey f gr$$$$ ayd Location Code: D4700TZZZZEZ Comments: Field Background (Bkg) reported in epm / detector area. Medium Bkg reponed in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0023 1213-1 12-4 02311 360 TM001 313.7 0.0 E01 134-3 13-1 02301 60 100.0 T01 13-2 97.0 13-3 92.0 13-4 103.0 14-1 95.0 14-2 99.0 14-3 103.0 14-4 89.0 1219-1 15-1 02311 120 271.5 15-2 260.5 15-3 288.5 15-4 252.0 15-5 233.0 15-6 236.5 16-1 269.5 16-2 281.0 16-3 247.0 16-4 303.5 16-5 290.0
)
16-6 276.0 ! 69-3 17 1 02302 60 TS001 79.0 1212-1 18-1 02300 TM001 49.0 18-2 54.0 19-1 48.0 19-2 60.0 397-3 20-1 02310 120 134.5 i 20-2 146.5 l 20-3 126.0 i 20-4 143.5 l l 20-5 129.5 399-3 21-1 145.0 21-2 166.5 21-3 137.5 21-4 152.0 1 21-5 160.0 l 1226-1 24-1 02300 60 95.0 ! 24-2 73.0 ! 25-1 85.0 l 25-2 95.0 ) Page 8:TSABS:V2.9.1.b.6.28.96 l Page 19
l l l Background Correction Values - \ Total Surface Activity - Beta Survey BEM gem-g Location Code: D4700TZZZZEZ Comments: Field Background (Bkg) reported in epm / detector area. Medium Bkg reponed in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0023 82-3 26-1 02300 60 TS001 130.0 0.0 T01 27-1 178.0 1211-1 28-1 02311 360 TM001 898.3 E01 28-2 787.7 28-3 619.3 28-4 758.0 29-1 711.2 29-2 672.5 29-3 611.7 29-4 499.7 B0037 132-3 3-1 02202 15 132.0 T01 1 3-2 92.0 ( 3-3 96.0 4-1 140.0 4-2 152.0 4-3 184.0 O L) Page 9:TSABS:V2.9.1.b.6.28.% Page 20
Sununary of Efficiency Values = Total Surface Activity - Beta Survey p=kMS$ yya Location Code: D4700TZZZZEZ Survey Reasons: E01 - Replacement, T01 - Initial Final Release Comments: Detector Detector Download # Efficiency Model Serial Number -Station # LMI 43-94/100 PR124111 69-3 0.041 LMI 44-40B PR095101 78-3 0.114 LMI 43-94/075 PR124110 82-3 0.071 LMI 43-94/100 PR124114 131-3 0.041 LMI 43-68/S PR092525 132-3 0.145 < 0.069 I LMI 43-94P100 PR124110 134-3 LMI 44-40B PR092645 139-3 0.111 LMI 43-106/S PR128920 365-3 0.154 LMI 43-98/200 PR117961 397-3 0.039 LMI 43-98/200 PR117961 399-3 0.043 LMI 43-94/075 PR124110 1189-1 0.070 LMI 43-98/300 PR123600 1211-1 0.035 l LMI 43-94/075 PR124114 1212-1 0.074 LMI 43-98/300 PR123600 1213-1 0.032 ' LMI 43-98/300 PR123600 1219-1 0.038 LMI 43-94/075 PR124110 1226-1 0.069 4 9 Page 10:TSABS:V2.9.1.b.6.28.96 Page 21
Survey Detection Equipment Used Total Surface Activity - Beta Survey ig r,c = : a a-- Location Code: D4700TZZZZEZ Survey Reasons: E01 - Replacement, T01 - Initial Final Release Medium Codes: B0019, B0020, B0023, B0037 Download # - Survey User ID M2350 S/N Detector Station Id S/N 69-3 LCF0451/98620 98620 PR124111 j 78-3 LCF0451/98620 98620 PR095101 1 82-3 DLB6373/98642 98642 PR124110 (] 131-3 ELS8308/126182 126182 PR124114 v 132-3 LCF0451/95359 95359 PR092525 134-3 LCF0451/98642 98642 PR124110 139-3 BJB1396/95359 95359 PR092645 365-3 CBA0876/126182 126182 PR128920 ! CBA0876/126179 397-3 126179 PR117961 399-3 LCF0451/117566 117566 PR117961 1189-1 DABB354/126212 126212 PR124110 1211-1 BJB1396/98643 98643 PR123600
~~1212-1 DTS6208/126179 126179 PR124114 1 5~~
1213-1 DAB 9854/98643 98643 PR123600 l 1219-1 BJB1396/98643 98643 PR123600 1226-1 LCF0451/98642 98642 PR124110 t Program Version: V2.9.1.b.6.28.96 Report Printed At: 04:49:40 PM on 06/28/96 Total Pages: 11 Page 11:TSABS:V2.9.1.b.6.28.% Page 22
Statistical Summary Removable Surface Activity - Beta Survey g ig=,g Location Code: D4700TZZZZEZ Survey Reason: T01 - Initial Final Release Medium Codes: B0019, B0020, B0023, B0037 Net dpm/100 cm2 l Upper Confidence Limit (UCL) 4.0 l l Mean 2.6 l l Maximum 32.4 l l Minimum -5.3 l l Standard Deviation 6.3 l , l Minimum Detectable Activity 24.9 l l Critical Level 9.3 l l Samples Reported 50l l Samples Prescribed 50 l Tests Performed i l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 187.5 dpm/100 cm2 YES l Passed l l Percent of Samples > 562.5 dpm/100 cm2 0.0 l Passed (3) l Number of Samples > 750.0 dpm/100 cm2 0 l Passed (4) ! l UCL of Mean less than or equal 750.0 dpm/100 cm2 YES l Passed l I l l (3) 10% Test j (4) Single Measurement Test l 9 Page 1:RSABS:V2.11.1.a.9.6.96 Page 23 FSR,_ STAT.FSL
V Plant Systems Corrected Field Activity Values Removable Surface Activity - Beta Survey g g=,.,,,,,,, Location Code: D4700TZZZZEZ Comments: Activity (net), MDA, and CL reponed dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 562.5 dpm/100 cm2 Italic values exceed 750.0 dpm/100 cm2 Medimn RC # Location ID - MDA Critical Activity Reason Code Location # Level Code B0019 l 26.26523 1-1 22.6 8.2 1.6 T01 26.26524 1-2 22.6 8.2 -3.0 26.26525 1-3 22.6- 8.2 10.9 26.26526 2-1 22.6 8.2 1.6 26.26527 2-2 22.6 8.2 -5.3 , 26.26528 2-3 22.6 82 3.9 B0020 26 21497 30-1 24.9 9.3 11.6 26.20604 31 1 22.2 8.0 4.2 O 26.20605 32-1 22.2 8.0 -2.8 26.21496 33-1 24.9 9.3 -4.6 26.21498 34-1 24.9 9.3 . 32.4 B0023 26.19802 5-1 24.0 88 -1.6 26.19803 52 24.0 8.8 0.7 26.19804 5-3 24.0 8.8 -1.6 26.21307 6-1 19.5 6.6 -3.5 26.21075 71 24.3 9.0 0.5 26.21076 8-1 24.3 9.0 1.9 l 26.21077 9-1 24.3 9.0 -1.9 26.21078 10-1 24.3 9.0 5.1 26.20031 11 1 21.9 7.8 -2.5 26.20032 12-1 21.9 7.8 11.3 26.21303 13-1 19.5 6.6 5.8 26.21308 14-1 19.5 6.6 1.2 26.21956 15-1 22.2 8.0 -2.8 26.21957 15 2 22.2 8.0 4.2 26.21958 16-1 22.2 8.0 . 8.8 26.21959 16-2 22.2 8.0 -2.8 26.20454 17-1 23.3 8.5 5.8 v 26.21097 18-1 24.3 9.0 7.4 26.21098 18-2 24.3 9.0 0.5 26.21099 19-1 24.3 9.0 5.1 Page 2:RSABS:V2.I1.1.a.9.6.% Page 24
1 i Plant Systems Corrected Field Activity Values = Removable Surface Activity - Beta Survey r= ISM I e--. M-C- t Location Code: D4700TZZZZEZ l Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed $62.5 dpm/100 cm2 Italic values exceed 750.0 dpm/100 cm2 Medium RC# Location ID - MDA Critical Activity Reason Code Location # Level Code B0023 26.21100 19-2 24.3 9.0 2.8 T01 26.27824 20-1 23.6 8.7 -1.4 26.28045 21-1 23.6 8.7 -3.7 26.26949 22-1 22.6 8.2 3.9 26.27815 23-1 23.6 8.7 -1.4 26.21979 24-1 22.6 8.2 -3.0 26.21980 24-2 22.6 8.2 -3.0 26.21977 25-1 22.6 8.2 8.6 26.21978 25-2 22.6 8.2 1.6 26.20606 26-1 22.2 8.0 -2.8 26.20603 27-1 22.2 8.0 -0.5 26.20601 28-1 22.2 8.0 1.9 26.20602 29-1 22.2 8.0 88 B0037 26.21304 31 19.5 6.6 3.5 26.21305 3-2 19.5 6.6 1.2 26.21306 3-3 19.5 6.6 5.8 26.21309 41 19.5 6.6 3.5 26.21310 42 19.5 6.6 10.4 26.21311 43 19.5 6.6 3.5 O Page 3:RSABS:V2.11.1.a.9.6.96 Page 25
i i O Graph of Activity versus Location Series r=== V Removable Surface Activity - Beta Survey l RM
~~,w =.y- J.~~
~~Location Code: D4700TZZZZEZ 4 i~~
)
Survey Reason: T01 - Initial Fmal Release . Medium Codes: B0019, B0020, B0023, B0037 i Guideline Value 750.0 dpm/100 cm'
~~800~~
~~. v-----+--w+-.--ym-.--,*-.+- w- - -:-+, -~~
700 - -------------- -------- ------- - -------- --------------- ------- l 4 600 - --- - ----- - ----------------------- ----------------------------- l 500- ----------- ---------- ---- ------------------------------------- g 400-- ------ - ----- -- ----- -------- -- ------------- ---- ----- - --
)
5 l c6 l 5 300 ------- -------- ----------- - - ----------- ------------ -------- t Z 2 03- ------ ----- ------ ------ - - --- -------- --------------------- 100 - - - ------- ---- ----- ----------------------------- -------------- I
~~,,. . . . . .- ...,,.....y,,,,.......-.-.......-........-.,,s ,~~
~~0 a-; *-aq,2 =4 -e ..,lm,,4 a44-44424 ze a42-*42*.4 s a-;;; m44 ;Aa4-4 a-*dm47 - 1~~
~~-100 444+4-4 i i ! ; ! ! ' ! ' '4 i ! ! ! l ' ' i l l4--i .~~
~~bi i-3 2-2 11 k-3 4-2 b1 L3' t1 41 11-1 13-1 15-1 16-1 171 15-2 142 21-1 23-1 24-2 25-2 27-1 241 31-1 111~~
. i !' ! ::'*'! !-4 12 2- 1 2-3 3-2 4-1 43 62 61 8-1 101 12-1 14-1 15-2 16-2 16-1 141 241 221 24-1 25-1 26-1 28-1 341 32-1 34-1 Location Series --- Critical Level -.- MDA -+--- Guideline Value -.- Activity l \ l 1
Page 4:RSABS:V2.I1.1.a.9.6.96 Page 26 l GRF3L7L8 FSL l l
Laboratory Equipment Used l Removable Surface Activity - Beta Survey h=m1 Location Code: D4700TZZZZEZ Survey Reason: T01 - Initial Final Release Medium Codes: B0019, B0020, B0023, B0037 Location Range Survey User ID Laboratory Serial Equipment Number 3-1 BJB1396 LB-5100W SN5100W 4-1 BJB1396 LB-5100W SN5100W 6-1 BJB1396 LB-5100W SN5100W 13-1 14-1 BJB1396 BJB1396 LB-5100W LB-5100W SN5100W SN5100W g 15-1 BJB1396 LB-5100W SN5100W 16-1 BJB1396 LB-5100W SN5100W 21-1 BJB1396 LB-5100W SN5100W 30-1 BJB1396 LB-5100W SN5100W 33-1 BJB1396 LB-5100W SN5100W 34-1 BJB1396 LB-5100W SN5100W 1-1 CBA0876 LB-5100W SN5100W 2-1 CBA0876 LB-5100W SN5100W 20-1 CBA0876 LB-5100W SN5100W 11-1 DAB 9854 LB-5100W SN5100W 12-1 DAB 9854 LB-5100W SN5100W 28-1 DAB 9854 LB-5100W SN5100W Program Version: V2.11.1.a.9.6.96 i Report Printed At: 05:40:35 PM on 09/10/96 Page 5:RSABS:V2.11.1.a.9.6.96 Page 27 FSR_LSYS FS
l Laboratory Equipment Used (' Removable Surfax Activity - Beta Survey j-
~~i. = ,. _- a.~~
Location Code: D4700TZZZZEZ Survey Reason: T01 - Initial Final Release i Medium Codes: B0019, B0020, B0023, B0037 Location Range Survey User ID Laboratory Serial Equipment Number ! 29-1 DAB 9854 LB-5100W SN5100W 7-1 DTS6208 LB-5100W SN5100W ! 8-1 DTS6208 LB-5100W SN5100W O 18-1 19-1 9-1 DTS6208 DTS6208 LB-5100W LB-5100W SN5100W SN5100W ELS8308 LB-5100W SN5100W 10-1 ELS8308 LB-5100W SN5100W 5-1 LCF0451 LB-5100W SN5100W 17-1 LCF0451 LB-5100W SN5100W 24-1 LCF0451 LB-5100W SN5100W l 25-1 LCF0451 LB-5100W SN5100W l 26-1 LCF0451 LB-5100W SN5100W I 27-1 LCF0451 SN5100W LB-5100W 31-1 LCF0451 SN5100W LB-5100W 32-1 LCF0451 SN5100W LB-5100W 22-1 VMB6153 SN5100W LB-5100W ' 23-1 VMB6153 LB-5100W SN5100W Program Version: V2.11.1.a.9.6.96 Report Printed At: 05:40:45 PM on 09/10/96 Total Pages: 6 Page 6:RSABS:V2.11.1.a.9.6.96 p FSR_LSYS FS
1 l 0
)
1 1 1 1 l THIs PAGE INTENTIONALLY i i LEFT BLANK e t I i l 1
i l Fort St. Vrain Nuclear Station l Decommissioning Project l Final Survey Report VOLUME 5 FINAL SURVEY OF GROUP D (BOOK 3 of 3) REVISION 1 Prepared by: Scientific Ecology Group, Inc. Field Services Division
Scientific Ecology Group, Inc. RadiologicalEngineering & Decommissioning Services gg
~~- ~ ~ ~~~
Fort St. Vrain Nuclear Generating Station Decommissioning Project ( Release Record Contents Survey Area Survey Area ID: Survey Area Description Pages D5100 Turbine Generator and Auxiliaries 2-3 4 Suney Unit (s) Location Code Servey Unit Description Pages I g Turbine Generator and Auxiliaries 4-22 O Prepared By: O O A^ / /D-2 V- 94 SEG yiolbgcal Engineer Date Reviewed By: A NWld / 10 / t 5-f 76 SEG Prpet Radiation Protection Manager Date Approved By: 6 b ff' / 16/25/M PSCo Radiation'frotection Manager Date O Page 1
Scientific Ecology Group, Inc. RadiologicalEngineering & Decommissioning Services gg
~~-~~~~
~~h J Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record - Survey Area Survey Area / Package ID: D5100 Survey Area~~
~~Description:~~
~~Turbine Generator and Auxiliaries, System #51 Survey Package~~
~~Description:~~
Turbine Generator and Auxiliaries The main turbine-generator and its auxiliaries converted the thermal energy of the inlet steam into electrical energy output. The auxiliary systems included: Generator Stator Cooling, Generator Bus Duct Cooling, Electro-liydraulic Control, Steam Seal (surveyed as part of system 55), liydrogen Seal Oil and the liydrogen, Nitrogen & Carbon Dioxide system. The Turbine Generator and Auxiliaries (System 51) interfaced with the following systems: System 22 (Secondary Cooling) , System 52/53 (Main Turbine / Extraction Steam Supply) - i System 31/32 (Feedwater and Condensate) l System 55 (Turbine Vents and Drains). These systems met the criteria for release for unrestricted use. The Turbine Generator and Auxiliaries were surveyed as an Unaffected System. Measurement locations were marked on maps to designate where sample measurements were collected.
~~. Survey Area OperationalIIIstory:~~
The Turbine Generator and Auxiliaries were in operation prior to plant shutdown August 18, 1989. The system had no history of radioactive contamination. The Turbine Generator and Auxiliaries System will be used in repowering. Survey Area Decommissioning and Remediation Activities: No radiological decommissioning or remediation was performed on the Turbine Generator and Auxiliaries. All equipment items remain in place. Isolation and Control Measures: Level 2 Controls l When appropriate, disassembled components were reassembled following survey. If reassembly was delayed or not performed, component openings were sealed with tape or other appropriate material to maintain isolation control. This system will be used for repowering. Page 2
Survey Area
~~Conclusions:~~
The results of total and removable surface activity measurements collected within this Survey O Area meet the criteria for release for unrestricted use. The results of the H-3/Fe-55 surface activity measurements were less than the Action Levels for unaffected plant systems. Survey Area iteferences: Initial Radiological Site Characterization Report volumes 1,2 and 12. System Description (SD-51) Turbine Generator and Auxiliaries. PI-51, PF-52, PI-75-3 General Electric Turbine Manual l Discussion with PSCo and Westinghouse Team personnel l l I l O1 i l O Page 3
g
~~~ ~ ~~~
~~Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Senices ~~~~~~
.Q Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record - Survey Unit Location Code: D5100 ZZZZZ DZT01 Group ID Survey Area Number Surface Category Survey Unit Classification D 5100 System Internals DZ (Unaffected)
~~Survey Reason: T01 - Initial Final Release E01 - Replacement Survey Unit~~
~~Description:~~
Turbine Generator and Auxiliaries i Survey Design: Measurement Type No. of Measurements Description Beta Scan N/A Scanned accessible surface at each total surface j activity location. No areas of elevated licensed ! activity were identified. l Total Surface 34 Collected total surface activity measurements at Activity designated locations from 14 plant system components. py Smears 33 Collected smears at designated locations from 14 plant system components. Special Samples 3 Collected three tritium / iron-55 removable activity samples at locations 1,13 and 14. .o
)
Page 4
Survey Unit Investigations: Investigation No.1 g The Minimal Detectable Activity measured at location 10 was 1,498.7 dpm/100 cm2 (download report 1209-3), which exceeded the targeted MDA of 1,250 dpm/100 cm2 The location was the LS-G3-L9 H2 /CO2 Liquid Detector. A Replacement Survey for total surface activity was performed under location code D5100 ZZZZZ DZE01. A longer count time of 6 minutes was used. The increased count time yielded an MDA less than 1250 dpm/100 cm2 for location 10. The measurement result obtained from the Replacement Survey replaced the result of the Initial Final Survey for this survey location. O O Page 5
O
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Fort St. Vrain Nuclear Generating Station Decommissioning Project ! Survey Location Summary Survey Measurements Location Description Location Collected 1 3 - TSA YF11 Stator Cooling Water Southwest Turbine Bldg 3 - RSA Filter I.evel 6, North side of skid 1 'll/"Fe 2 3 - TSA YDE-1 Stator Cooling Water Southwest Turbine Bldg 3 - RSA Demineralizer Ixvel 6 East side of skid 3 2 - TS A YF1-2 Stator Cooling Water Southwest 7brbine Building 2 - RSA Make-up Water Filter Ixvel 6, Northeast of skid j 4 - TSA S920lX Generator B/D Cooling South Turbine Building 4 Ixvel 5
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4 - RSA AIIU Removable Air Filters 5 4 - TSA Generator Bus Duct Cooling South Turbine Building 4 - RSA Supply to Exciter Casing Ixvel 7. Exciter 6 2 - TS A liF1-1 Ilydrogen Seal Oil Cuno Southwest Turbine Building 2-RSA Filter Ixvel 5, East side of skid 7 1 - TSA H-15 Emergency Seal Oil Pump Southwest Turbine Building 1 - RSA Discharge Relief Valve Ixvel 5 8 1 - TSA GS-L20 Liquid Detector Southwest Turbine Building 1-RSA Izvel 5, mounted on column 9 2 - TSA 2" L5156 Nitrogen Supply to Southeast Turbine Building 1 - RSA Bldg Hot Water Expansion Tank Ixvel 11 10 1 - TSA LS-G3-L9 H,/CO, Liquid Southwest Turbine Building 1 - RS A Detector Ixvel 5, mounted on column i1 1 - TSA EHC Skid Vent North Turbine Bldg, Ixvel 5 1 - RSA 12 2 - TSA EHC Skid Fullers Earth Filter North Turbine Building 2 - RSA Ixvel 5, West side of skid 13 4 - TSA NE Inspection Cover LP Turbine Turbine Building, Ixvel 7 4 - RSA 1 'H/"Fe 14 4 - TSA Southwest inspection Cover LP Turbine Building, Ixvel 7 4 - RSA Turbine 1 'H/"Fe Page 7
Scientific Ecology Group, Inc. gg Radiological Engineering & Decommissioning Services ==~~ Fort St. Vrain Nuclear Generating Station Decommissioning Project Special Samples Location Code: D5100 ZZZZZ DZT01 Comments: H-3/Fe-55 activity reported in Net dpm/100 cm2 Underlined values exceed the critical level Bold values exceed 250 dpm/100 cm2 Italic values exceed 1,000 dpm/100 cm2 Tritium / Iron-55 Removable Activity Samples Location # Type of Sample Critical Level MDA Activity 1-1 H-3/Fe-55 7.1 15.7 2.3 13-1 H-3/Fe-55 19.1 43.3 38.2 I 'I H-3/Fe-55 6.9 15.2 17.5 4 Page 8
Compilation of Statistical Summaries Total Surface Activity - Beta Survey f$f]@S
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Removable Surface Activity - Beta Survey Location Code: D5100TZZZZDZ Medium Codes: B0018, B0020, B0023, B0031 Comments: Total Surface Activity (TSA) reported in Net dpm/100 cm2 Removable Surface Activity (RSA) reported in Net dpm/100 cm2 TSA RSA Upper Confidence ihnit (UCL) Mean 128.9 64.0 3.3 2.0 h Maximum 732.3 12.3 Minimum -252.1 -4.2 Standard Deviation 225.0 4.5 Minimum Detectable Activity 1,092.5 25.2 Critical Level 528.4 9.5 Samples Reported 34 33 l Samples Prescribed 34 33 l Page 1: ERGS:V2.11.1.a.9.6.96 Page 9
l [ Statistical Summary gg Total Surface Activity - Beta Survey 6,:,:=r.gg
a-Location Code: D5100TZZZZDZ Survey Reasons: T01 - Initial Final Release, E01 - Replacement Medium Codes: B0018, B0020, B0023, B0031 Net dpm/100 cm2 l Upper Confidence Limit (UCL) 128.9 l l Mean 64.0 l l l Maximum 732.3 l ;
l Minimum -252.1 l l Standard Deviation 225.0 l { l Minimum Detectable Activity 1,092.5 l j l Critical level 528.4 l l Samples Reported 34 l l Samples Prescribed 34 l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 1,250.0 dpm/100 cm2 YES l Passed l Percent of Samples > 1,250.0 dpm/100 cm2 0.0 l Passed (3) l Number of Samples > 2,500.0 dpm/100 cm2 0 l Passed (4) l UCL of Mean less than or equal 5,000.0 dpm/100 cm2 YES l Passed (3) 10% Test (4) Single Measurement Test 0 Page 1:TSABS:V2.11.1.a.9.6.% . Page 10 I FSR_ STAT.FSL
Plant Systems Corrected Field Activity Values Total Surface Activity - Beta Survey P==d M i.Em_, h Location Code: D5100TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlired values exceed the critical level. Bold vdues exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 Cour4 time reported in seconds. Medium Download // Location ID - Count MDA Critical Activity Reason ! Code Station # L9 cation # Time Level Code B0018 1197-1 5-1 15 709.2 334.8 -204.6 701 5-2 666.4 313.4 175.3 5-3 659.0 309.7 87.7 5-4 677.4 318.9 277.6 1194-1 11-1 180 866.9 408.1 112.2 B0020 7-1 819.1 384.2 -130.9 e i 1 B0023 i 114-3 91 120 1.074.6 519.5 552.6 l g_2 1,092.5 528.4 13.2 l I I B0031 I 37-3 1-1 15 780.1 363.8 116.4 l 1-2 721.8 334.6 -97.0 i 1-3 651.1 299.3 97.0 2-1 745.7 346.6 38.8 2-2 807.5 377.5 -252.1 2-3 869.7 408.6 155.2 3-1 849.5 398.5 58.2 3-2 684.2 315.8 465.5 1174-1 4-1 734.1 345.5 63.7 ! 4-2 738.0 347.4 429.9 Page 2:TSABS:V2.I1.1.a.9.6.96 Page 11
Plant Systems Corrected Field Activity Values
~~'u Total Surface Activity - Beta Survey lb. .,, 2 i.Sa,bb l~~
Location Code: D5100TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underimed values exceed the critical level. Bold values exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 ; Count time reported in seconds. Medium Download # . Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0031 , 1174 1 4-3 15 730.1 343.5 47.8 T01 4-4 705.7 331.3 _Z32.3 1207-1 6-1 180 1,090.7 517.6 163.9 6-2 928.9 436.7 81.9 1190-1 8-1 600 863.8 421.8 -239.1 245-3 10-1 360 1,081.5 524.1 -36.8 E01 55-3 12-1 15 886.7 412.8 67.6 T01 12-2 950.8 444.8 -67.6 < 113-3 13-1 563.2 - 261.4 -44.7 13-2 510.0 234.8 -89.3 13-3 499.7 229.7 -134.0 f s 13-4 14-1 461.6 544.5 210.6 252.1
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14 2 483.8 221.7 287.9 4 14-3 520.1 239.9 -193.5 l 14-4 530.0 244.8 74.4 l O C/ Page 3:TSABS:V2.11.1.a.9.6.%
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~~Graph of Activity versus Location Series Total Surface Activity - Beta Survey r=25@ 15~~
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Location Code: D5100TZZZZDZ Survey Reasons: T01 - Initial Final Release, E01 - Replacement Medium Codes: B0018, B0020, B0023, B0031 Average Guideline Value 5000.0 dpm/100 cm2 2500 2000 - - - - ------- --------- ------ - - - ---- --- - -------------- 1 500 [ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ---- ------------------ ---- 8 . ..- O 1000 _ . ... - . .... ............ K.. . ... g .~. 7 x, . .. , _.,_, j - y
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---- Critical level -. - MDA l -*-- Average Guideline Value (off-scale) -.- Activity !
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( Background Correction Values -- Total Surface Activity - Beta Survey m.=s Location Code: D5100TZZZZDZ Comments: Field Background (Bkg) reported in epm / detector area. Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B 918 1197-1 5-1 02201 15 TM001 388.0 0.0 T01 5-2 340.0 5-3 332.0 5-4 352.0 1194 1 11-1 02000 180 TS001 29.3 B0020 7-1 26.0 l l B0023 114-3 9-1 02310 120 TM001 144.0 9-2 149.0 B0031 37-3 1-1 02202 15 260.0 1-2 220.0 1-3 176.0 2-1 236.0 2-2 280.0 l' 2-3 328.0 O 3-1 312.0 b 1174-1 3-2 4-1 02201 196.0 348.0 4-2 352.0 Page 5:TSABS:V2.11.1.a.9.6.% Page 14
Background Correction Values - Total Surface Activity - Beta Survey f.j[$ ph. M Location Code: D5100TZZZZDZ Comments: Field Background (Bkg) reported in cpm / detector area. Medium Bkg reper:ed in dpm/100 cm2 Count tirx reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code 80031 1174-1 4-3 02201 15 TM001 344.0 0.0 T01 4-4 320.0 1207 1 6-1 02000 180 39.3 6-2 28.0 1190-1 8-1 02101 600 TS001 58.9 245-3 10-1 360 56.2 E01 55-3 12-1 02202 15 TM001 248.0 T01 12-2 288.0 113-3 13-1 02201 228.0 13-2 184.0 13-3 176.0 13-4 148.0 14-1 212.0 14-2 164.0 14-3 192.0 14-4 200.0 0 Page 6:TSABS:V2.I1.1.a.9.6.96 Page 15
Summary of Efficiency Values Total Surface Activity - Beta Survey g
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Location Code: D5100TZZZZDZ l Survey Reasons: T01 - Initial Final Release, E01 - Replacement Comments: i Detector Detector Download # Efficiency i Model Serial Number -Station # - i LMI 43-68/S PR095535 37-3 0.165 LMI 4348/S PR095083 55-3 0.142 LMI 43-1068 PR128925 113-3 0.215-LMI 43-98/200 PR117961 114-3 0.038 SEG SP-113-3M PR621311 245-3 0.070 LMI 43-106B PR128913 1174-1 0.201 SEG SP-113-3M PR621311 1190-1 0.069 LM144-40B PR094981 1194-1 0.115 LMI 43-1068 PR128919 1197-1 0.219 LMI 44-40B PR092645 1207-1 0.105 O l I l l 4 I 4 O Page 7:TSABS:V2.11.1.a.9.6.% Page 16
Survey Detection Equipment Used Total Surface Activity - Beta Survey lgg
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Location Code: D5100TZZZZDZ Survey Reasons: T01 - Initial Final Release, E01 - Replacement Medium Codes: B0018, B0020, B0023, B0031 Download # - Survey User ID M2350 S/N Detector Station Id S/N 37-3 DTS6208/98643 98643 PR095535 55-3 DAB 9854/98620 98620 PR095083 113-3 LCF0451/126175 126175 PR128925 114-3 245-3 DTS6208/95348 ELS8308/126175 95348 126175 PR117961 PR621311 g 1174-1 DTS6208/126198 126198 PR128913 1190-1 DTS6208/126218 126218 PR621311 j 1194 1 DAB 9854/98642 98642 PR094981 1197-1 DLB6373/126182 126182 PR128919 ! 1207-1 BJB1396/95359 95359 PR092645 l l Program Version: V2.11.1.a.9.6.96 Report Printed At: 09.02:02 AM on 09/09/96 g Total Pages: 8 Page 8:TSABS:V2.I1.1.a.9.6.96 Page 17 l
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i Statistical Summary - g Removable Surface Activity - Beta Survey p= m Location Code: D5100TZZZZDZ 1 Survey Reason: T01 - Initial Final Release Medium Codes: B0018, B0020, B0023, B0031 4 Net dpm/100 cm2 l Upper Confidence Limit (UCL) 3.3 l l Mean 2.0 l l Maximum 12.3 l l Minimum -4.2 l q l Standard Deviation 4.5 l
' b l Minimum Detectable Activity 25.2 l l Critical Level 9.5 l l Samples Reported 33l l Samples Prescribed 33l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 250.0 dpm/100 cm2 YES l Passed l Percent of Samples > 250.0 dpm/100 cm2 0.0j Passed (3) l Number of Samples > 500.0 dpm/100 cm2 0 ] Passed (4) l UCL of Mean less than or equal 1,000.0 dpm/100 cm2 YES l Passed (3) 10% Test (4) Single Measurement Test .' j Page 1:RSABS:V2.8.3.a.6.12.%
Page 18
Plant Systems Corrected Field Activity Values Removable Surface Activity - Beta Survey g e m - ,- g Location Code: D5100TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underimed values exceed the critical level. Bold values exceed 250.0 dpm/100 cm2 Italic values exceed 1,000.0 dpm/100 cm2 Medium RC# Location ID - MDA Critical Activity Reason Code Location # Level Code B0018 26.20027 5-1 21.9 7.8 -0.2 T01 26.20028 5-2 21.9 7.8 9.0 26.20029 5-3 21.9 7.8 -0.2 26.20030 5-4 21.9 7.8 6.7 26.19999 11-1 18.5 6.1 -3.0 B0020 26.19998 71 18.5 6.1 -3.0
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l i B0023 26.21036 9-1 22.9 8.3 -3.2 B0031 26.19731 1-1 24.0 8.8 1.6 ! 26.19732 1-2 24.0 8.8 0.7 l 26.19733 1-3 24.0 8.8 0.7 26.19734 2-1 24.0 8.8 0.7 26.19735 2-2 24.0 8.8 12.3 26.19736 2-3 24.0 8.8 0.7 26.19729 3-1 25.2 9.5 -0.2 26.19730 3-2 24.0 8.8 -1.6 26.18846 4-1 22.6 8.2 -3.0 26.18847 4-2 22.6 8.2 3.9 Page 2:RSABS:V2.8.3.a.6.12.96 Page 19 I
( Plant Systems Corrected Field Activity Values Removable Surface Activity - Beta Survey g
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Bold values exceed 250.0 dpm/100 cm2 Italic values exceed 1,000.0 dpm/100 cm2 Medium RC # Location ID - MDA Critical Activity Reason Code Location # Level Code 80031 26.18848 4-3 22.6 8.2 -0.7 T01 26.18849 4-4 22.6 8.2 3.9 26.21001 6-1 22.9 8.3 3.7 26.21002 6-2 22.9 8.3 1.4 26.19805 8-1 24.0 8.8 0.7 26.21121 10-1 23.3 8.5 -1.2 26.19996 12-1 18.5 6.1 10.9 26.19997 12-2 18.5 6.1 -3.0 26.21037 13-1 20.7 7.2 5.1 26.21038 13-2 20.7 7.2 12.0 26.21039 13-3 20.7 7.2 5.1
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26.21042 14-2 20.7 7.2 7.4 < 26.21043 14-3 20.7 7.2 0.5 26.21044 14-4 20.7 7.2 -4.2 1 1 1 l l O C/ i Page 3:RSABS:V2.8.3.a.6.12.% l Page 20
Graph of Activity versus Location Series Rernovable Surface Activity - Beta Survey
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cm-c_ Location Code: DS100TZZZZDZ Survey Reason: T01 -Initial Final Release Medium Codes: B0018, B0020, B0023, B0031 Guideline Value 1000.0 dpm/100 cm8 275 225- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - * - - - - - - - - - - - - - - - - - - - - - - - _ 175- ------------------------------------------------------- ------------ 8 8 125- ------------------------------------------------------------------- ch
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Page 4:RSABS:V2.8.3.a.6.12.96 Page 21
p Laboratory Equipment Used -
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Location Code: D5100TZZZZDZ Survey Reason: T01 -Initial Final Release Medium Codes: B0018, B0020, B0023, B0031 Location Range Survey User ID Laboratory Serial Equipment Number 13-1 to 13-4 BJB1396 LB-5100W SN5100W 14-1 to 14-4 BJB1396 LB-5100W SN5100W i 6-1 to 6-2 DAB 9854 LB-5100W SN5100W 7-1 LB-5100W f] V 11-1 DAB 9854 DAB 9854 LB-5100W SN5100W SN5100W 12-1 to 12-2 DAB 9854 LB-5100W SN5100W 10-1 DRS1739 LB-5100W SN5100W 3-1 to 3-2 DiSS208 LB-5100W SN5100W 4-1 to 44 DTS6208 LB-5100W SN5100W 8-1 DTS6208 LB-5100W SN5100W 9-1 DTS6208 LB-5100W SN5100W 1-1 to 1-3 JDT2759 SN5100W LB-5100W 2-1 to 2-3 JDT2759 SN5100W LB-5100W 5-1 to 5-4 LCF0451 SN5100W LB-5100W l Program Version: V2.8.3.a.6.12.96 l O Report Printed At: 12:17:46 PM on 06/18/96 ,O Total Pages: 5 j Page 5:RSABS:V2.8.3.a.6.12.% Page 22 l
Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Services -~~ g Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record Contents Survey Area Survey Area ID: Survey Area Description Pages D5200 Main Steam Supply / Extraction System 2-3 Survey Unit (s) l l l Location Codes Survey Unit Description Pages h Main Steam Supply / Extraction System 4-19 o l Prepared By: h/ SEG F/diMical Engineer g h / /v-2/- f d Date l Reviewed By: / lo / ' ' /94 SEG Prdj6ct Radiation Protection Manager Date Approved By: ~. W M;t #r m3r / /e/r# /f4 , PSCo Radiation Prottction Manager Date Page 1
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Scientific Ecology Group, Inc. Egsg Radiolog cal Engineen*ng & Decommissioning Services - - - p/ w Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record - Survey Area Survey Area / Package ID: D5200 l Survey Area
~~Description:~~
~~Main Steam Supply / Extraction System System # 52 / 53 Survey Package~~
~~Description:~~
Main Steam Supply / Extraction System The Main Steam Supply System conveyed steam produced in the steam generators by reactor power to and from the turbine generator. The Extraction Steam System transported steam to various reactor and turbine plant equipment from one or more of the following: the Cold Reheat subsystem, the Bypass Flash Tank subsystem (normal supply) and the Auxiliary Boiler System (backup). The Main Steam Supply / Extraction System was surveyed as an Unaffected System. l Measurement locations were marked on maps to designate where sample measurements were l collected. Survey Area OperationalIllstory: L The Main Steam Supply / Extraction System was in operation prior to plant shutdown August 18, 1989. System 52 (Main Steam Supply) was supplied by System 22 (Secondary Cooling System) during operations and by System 84 (Auxiliary Boiler and Heating System) during plant shutdown periods. The Main Steam Supply / Extraction System had no history of radioactive I contamination. l Portions of the Main Steam Supply / Extraction System will be used in repowering. Survey Area Decommissioning and Remediation Activities: No radiological decommissioning or remediation was performed on the Main Steam Supply / Extraction System. The steam turbines for the A & C Boiler Feed Pumps were removed for salvage. Isolation and Control Measures: Level 2 Controls When appropriate, disassembled components were reassembled following survey. If reassembly was delayed or not performed, component openings were scaled with tape or other appropriate i material to maintain isolation control. Portions of this system not used for repowering have been abandoned in place. h '(G Page 2
Survey Area
~~Conclusions:~~
The results of total and removable surface activity measurements collected within this Survey Area meet the criteria for release for unrestricted use. The sample result of the removable H-3/Fe-55 surface activity measurement was less than the Minimum Detectable Activity. Survey Area
~~References:~~
Initial Radiological Site Characterization Report Volumes 1,2 and 12. System Description (SD-52) Main Steam Supply System System Description (SD-53) Extraction Steam System PI-52, PI-53, PI-22-4, PI-22-9 Discussion with PSCo and Westinghouse Team personnel O O Page 3 i
l l Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Services g
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O G Fort St. Vrain Nuclear Generating Station Decommissioning Project i Release Record - Survey Unit Location Code: D5200 ZZZZZ DZT01 D5200 ZZZZZ DZE01 Group ID Survey Area Number Surface Category Survey Unit Classification D 5200 System Internals DZ (Unaffected) Survey Reason: T01 - Initial Final Release E01 - Replacement Survey Survey Unit
~~Description:~~
Main Steam Supply / Extraction System Survey Design: f) Measurement Type No. of Measurements Description LJ Beta Scan N/A Scanned accessible surface at each total surface activity location. No areas of elevated licensed activity were identified. Total Surface 34 Ccilected total surface activity measurements at Activity dedgnated locations from 10 plant system components, py Smears 34 Collected removable activity samples at i designated locations from 10 plant system components. Special Samples 1 Collected one tritiura/ir -55 removable activity smear sample at lor.ation 1. i Page 4
Survey Unit Investigations: Investigation No.1 g Elevated readings in the range of 1,523.7 to 5,806.5 dpm/100 cm2 were detected during the initial survey of location 10, download report 279-3. This location was a 4" drain line from the Bypass Flash Tank (T-5201) and was surveyed with a SEG SP-113-3M S/N PR621311. An examination of the initial survey background measurements at the location indicated that the background readings were abnormally low for this detector (10 to 17 cpm / detector area versus a normal of approximately 50 cpm / detector area). A review of other background measurements taken with the SEG SP-113-3M S/N PR621311, did not indicate a trend of low background results, thus, the suspect background measurements were apparently random results. An investigation was performed using detector model SEG SP-113-3M S/N PR621311. A scan of the pipe and a total surface activity reading at the point of highest audible count rate detected no elevated activity. The total surface activity measurement was 204.7 dpm/100 cm2 A Replacement Survey for both total surface and removable activity was performed under location code D5200 ZZZZZ DZE01. A longer count time of 10 minutes was used for the total surface activity measurements. The detector model used was a SEG SP-175-3M S/N PR024349. The measurement results obtained from the Replacement Survey replaced the results of the Initial Final Survey for this survey location. Evaluation of the Replacement Survey results confirmed the Investigation Survey results that O elevated activity was not present. The sample activity readings were below action levels, therefore, no further action was necessary. O O Page 5
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~~Fort St. Vrain Nuclear Generating Station Decommissioning Project Survey Location Summary Survey l~~
' rewnts Location Location Description l Cdi Number i Turbine Building, Izvel 10 !
1 4 - TSA T-5201, Bypass Flash Tank 4 - RSA Survey Area C0040 1 'II/"Fe 2 If V-5365,18", Stop/ check valve Turbine Building, Irvel 6, 4 - TSA East of Condenser f r extraction steam to heater 3 4 - RSA Survey Area C0023 3 11 t Reheat Line L-5216 Turbine Building,12 vel 6, 2 'I'SA North by poppet valves 2 - RSA Survey Area C0021 4 21.75" L-5201, outlet from Main Turbine Building,12 vel 6 4 , .I'S A Steam Generators West A Survey Area C0021 5 V-5397,10", Check valve Turbine Building, Ixvel 12 3 - TSA yPass Rash Tad West 4 Ween 3 - RSA Survey Area C0043 and Deaerator Tank (E-3104) 6 IIV-5313, 8" Stop/ check valve Turbine Building,12 vel 6, 3 - TSA East of Condenser f r extraction valve to heater 5. 3 - RSA Survey Area C0023 7 8 Line downstream of V-5325 Turbine Building, Izvel 5 4 - TSA Southeast of Condenser 4~ ^ Survey Area C0007 8 6" L-2260, Reheat steam line to Turbine Building, Ixvel 6 2 - TS A west en . 2 - RSA Survey Area C0021 9 6" L-5208, Line feeding pressure Turbine Building, Izvel 5 4 - TSA control valve PC 5214-1 North at PC-5214 Station 4 - RSA Survey Area C0007 10 4" L-52252, Drain line for the Turbine Building,12 vel 8 4 . .g,3 Bypass Flash Tank by V-5288 4 - RSA Survey Area C0034 O Page 7
Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Services gg
~~- ~ ~x Fort St. Vrain Nuclear Generating Station Decommissioning Project Special Samples Location Code: D5200 ZZZZZ DZT01 Comments:~~
H-3/Fe-55 activity reported in Net dpm/100 cm2 Underlined values exceed the critical level Bold values exceed 250 dpm/100 cm2 Italic values exceed 1,000 dpm/100 cm2 Tritium / Iron-55 Removable Activity Sample Location # Type of Sample Critical level MDA Activity 1-1 H-3/Fe-55 10.0 22.3 5.2 l O l O I Page 8 ,
Compilation of Statistical Summaries Total Surface Activity - Beta Survey jf,j@[Fg
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Removable Surface Activity - Beta Survey location Code: D5200TZZZZDZ Medium Codes: B0019, B0020, B0023 Comments: Total Surface Activity (TSA) reported in Net dpm/100 cm2 Removable Surface Activity (RSA) reported in Net dpm/100 cm2 TSA RSA Upper Confidence Limit (UCL) 64.5
~~-26.6 17 0.6 g~~
Mean Maximum 918.9 13.4 Minimum -727.7 -6.9 Standard Deviation 315.5 3.9 Minimum Detectable Activity 1,136.2 26.7 Critical Level 539.5 10.2 Samples Reported 34 34 Samples Prescribed 34 34 O Page 1: ERGS:V2.10.2.a.8.19.96 Page 9
p d Statistical Summary Total Surface Activity - Beta Survey g ha=_gg ~- Location Code: D5200TZZZZDZ Survey Reasons: E01 - Replacement, T01 - Initial Final Release Medium Codes: B0019, B0020, B0023 Net dpm/100 cm2 l Upper Confidence Limit (UCL) 64.5 l l Mean -26.6 l l Maximum 918.9 l l Minimum -727.7 l 315.5 q l Standard Deviation l \s.) l Minimum Detectable Activity 1,136.2 l l Critical Level 539.5 l l Samples Reported 34 l l Samples Prescribed 34 l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 1,250.0 dpm/100 cm2 YES l Passed l Percent of Samples > 1,250.0 dpm/100 cm2 0.0 l Passed (3) l Number of Samples > 2,500.0 dpm/100 cm2 0 l Passed (4) l UCL of Mean less than or equal 5,000.0 dpm/100 cm2 YES l Passed (3) 10% Test (4) Single Measurement Test O) \~ Page 1:TSABS:V2.10.2.a.8.19.% Page 10 FSR_ STAT.FSL
Plant Systems Corrected Field Activity Values
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Total Surface Activity - Beta Survey n= =- Location Code: D5200TZZZZDZ Commerts: Activity (net), MDA, and CL reponed dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0019 271-3 1-1 15 406.8 180.9 116.1 T01 1-2 568.2 261.6 182.4 1-3 414.9 185.0 165.8 1-4 544.9 250.0 -132.6 B0020 1227-1 2-1 725.8 335.3 142.7 2-2 662.5 303.6 20.4 2-3 583.2 264.0 -40.8 2-4 662.5 303.6 224.2 176-3 5-1 660.9 301.9 273.7 5-2 882.4 412.7 -147.4 5-3 714.1 328.5 147.4 l 142-3 6-1 180 966.9 454.9 -168.7 i 6-2 956.2 449.5 -210.8 l 6-3 1,136.2 539.5 -632.5 B0023 248-3 3-1 15 577.0 260.3 103.9 3-2 567.9 255.8 -83.1 1227-1 4-1 677.1 310.9 -183.4 42 565.9 255.3 20.4 4-3 591.7 268.2 -326.1 4-4 632.1 288.4 81.5 250-3 71 600 851.5 415.7 -500.5 7-2 830.2 405.0 -224.1 7-3 700.4 385.1 642.5 l 7-4 730.0 354.9 918.9 I l 272-3 8-1 757.0 368.2 128.9 8-2 749.4 364.4 83.4 9-1 706.3 342.9 -128.9 9-2 762.9 371.2 -727.7 9-3 745.9 362.7 -242.6 9-4 732.1 355.8 -60.6 528-3 10-1 520.3 256.5 144.3 E01 l 10-2 487.3 240.0 152.4 ! 10-3 497.1 244.9 -392.0 10-4 482.1 237.4 5.4 Page 2:TSABS:V2.10.2.a.8.19.96 Page 11 l
d Graph of Activity versus Location Series Total Surface Activity - Beta Survey g
,+,:=.==. : s Location Code: D5200TZZZZDZ Survey Reasons: E01 - Replacement, T01 - Initial Final Release Medium Codes: B0019, B0020, B0023 Average Guideline Value 5000.0 dpm/100 cm2 2500 2003-- - - - - ------------- ----------- ---- ------ ------------ ----------
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Page 3:TSABS:V2.10.2.a.8.19.96 GRFSL7L8 FSL Page 12
Background Correction Values Total Surface Activity - Beta Survey i.E..=d@$ Location Code: D5200TZZZZDZ Comments: Field Background (Bkg) reported in cpm / detector area. Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0019 271-3 1-1 02201 15 TM001 88.0 0.0 T01
,-2 184.0 1-3 92.0 1-4 168.0 B0020 1227-1 2-1 02202 200.0 2-2 164.0 2-3 124.0 2-4 164.0 176-3 5-1 02203 152.0 5-2 284.0 5-3 180.0 142-3 6-1 02000 180 28.7 6-2 28.0 6-3 40.3 B0023 248-3 3-1 02203 15 116.0 3-2 112.0 1227-1 4-1 02202 172.0 4-2 116.0 4-3 128.0 4-4 148.0 250-3 71 02101 600 57.2 7-2 54.3 7-3 491 7-4 41.7 272-3 8-1 43.6 8-2 42.7 9-1 37.8 9-2 44.3 9-3 42.3 9-4 40.7 528-3 10-1 02100 164.0 E01 10-2 143.6 10-3 149.5 10-4 140.5 Page 4:TSABS:V2.10.2.a.8.19.96 Page 13 i
Summary of Efficiency Values ! Total Surface Activity - Beta Survey r.ca,.u.. Location Code: D5200TZZZZDZ Survey Reasons: E01 - Replacement, T01 - Initial Final Release l l Comments: l Detector Detector Download # Efficiency Model Se:lal Number -Station # LM144-40B PR092645 142-3 0.102 LMI 43-106/S PR128920 176-3 0.152 : LMI 43-106/S PR128920 248-3 0.154-SEG SP-113-3M PR621311 250-3 0.069 LMI 43106B PR126901 271-3 0.193 SEG SP-113-3M PR621311 272-3 0.068 SEG SP-175-3M PR024349 528-3 0.079 ) LMI 43-68/S PR092525 1227-1 0.157 O l O Page 5:TSABS:V2.10.2.a.8.19.% Page 14
l Survey Detection Equipment Used Total Surface Activity - Beta Survey g
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Location Code: D5200TZZZZDZ Survey Reasons: E01 - Replacement, T01 - Initial Final Release l l Medium Codes: B0019, B0020, B0023 l Download # - Survey User ID M2350 S/N Detector l Station Id S/N ! 142-3 BJB1396/95359 95359 PR092645 176-3 LCF0451/126182 126182 PR128920 , 248-3 BJB1396/126182 123182 PR128920 250-3 ELS8308/126175 126175 PR621311 &' 271-3 BJB1396/126192 126192 PR126901 W 272-3 ELS8308/126175 126175 PR621311 528-3 ELS8308/126179 126179 PR024349 1227-1 DTS6208/95359 95359 PR092525 Program Version: V2.10.2.a.8.19.96 Report Printed At: 11:47:58 AM on 08/29/96 Total Pages: 6 Page 6:TSABS:V2.10.2.a.8.19.96 Page 15
Statistical Summary { N Removable Surface Activity - Beta Survey fg.a. m Location Code: D5200TZZZZDZ f Survey Reason: T01 -Initial Final Release Medium Codes: B0019, B0020, B0023 i Net dpm/100 cm2 l Upper Confidence Limit (UCL) 1.7 l l Mean 0.6 l l Maximum 13.4 l l Minimum -6.9 l l Standard Deviation 3.9 l l Minimum Detectable Activity 26.7 l l Critical Level 10.2 l , l Samples Reported 34 l l Samples Prescribed 34 l Tests Performed ; l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 250.0 dpm/100 cm2 YES l Passed l Percent of Samples > 250.0 dpm/100 cm2 0.0 l Passed (3) l l Number of Samples > 500.0 dpm/100 cm2 0 l Passed (4) l l UCL of Mean less than or equal 1,000.0 dpm/100 cm2 YES l Passed (3) 10% Test (4) Single Measurement Test Page 1:RSABS:V2.10.2.a.8.19.% Page 16 FSR_ STAT.FSL
Plant Systems Corrected Field Activity Values I-i Removable Surface Activity - Beta Survey f.E. =,._.[.d
~~;. _ IS Location Code: D5200TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level.~~
Bold values exceed 250.0 dpm/100 cm8 Italic values exceed 1,000.0 dpm/100 cm2 Medium RC# Location ID - MDA Critical Activity Reason Code Location # Level Code B0019 26.23290 1-1 25.5 9.6 -2.8 T01 26.23291 1-2 25.5 9.6 -0.5 26.23292 1-3 25.5 9.6 -2.8 26.23293 1-4 25.5 9.6 1.9 B0020 26.21967 2-1 22.2 8.0 1.9 26.21968 2-2 22.2 8.0 -0.5 ; 26.21969 2-3 22.2 8.0 -0.5 26.21970 2-4 22.2 8.0 -2.8 26.22228 5-1 23.3 8.5 3.5 26.22229 5-2 23.3 8.5 3.5 26.22230 5-3 23.3 8.5 -3.5 26.21499 61 24.9 9.3 -6.9 26.21500 6-2 24.9 9.3 2.3 26.21501 6-3 24.9 9.3 -4.6 B0023 26.23063 3-1 26.7 10.2 0.9 26.23064 32 26.7 10.2 -3.7 26.21971 41 22.2 8.0 4.2 26.21972 42 22.2 8.0 1.9 26.21973 4-3 22.2 8.0 -0.5 26.21974 4-4 22.2 8.0 -2.8 26.21912 71 22.2 8.0 -2.8 26.21913 72 22.2 8.0 -2.8 26.21914 7-3 22.2 8.0 -0.5 26.21915 74 22.2 8.0 -0.5 26.21916 8-1 22.2 8.0 1.9 26.21917 8-2 22.2 8.0 6.5 26.21918 9-1 22.2 8.0 1.9 26.21919 9-2 22.2 8.0 6.5 26.21920 9-3 22.2 8.0 4.2 26.21921 9-4 22.2 8.0 1.9 26.21922 10-1 22.2 8.0 13.4 26.21923 10 2 22.2 8.0 -0.5 26.21924 10-3 22.2 8.0 -0.5 26.21925 10-4 22.2 8.0 4.2 Page 2:RSABS:V2.10.2.a.8.19.96 Page 17
I l Graph of Activity versus Location Series Removable Surface Activity - Beta Survey
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Location Code: D5200TZZZZDZ i l Survey Reason: T01 -Initial Final Release Medium Codes: B0019, B0020, B0023 i l Guideline Value l 1000.0 dpm/100 cm' J 275 ) 225------------------------------------------------------------------ 175- ---- --- -------- ------------------------- ------- ----- ---------- M 8 8
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Laboratory Equipment Used Removable Surface Activity - Beta Survey g i.cafa Location Code: D5200TZZZZDZ Survey Reason: T01 - Initial Final Release Medium Codes: B0019, B0020, B0023 Location Range Survey User ID Laboratory Serial Equipment Number 1-1 to 1-4 BJB1396 LB-5100W SN5100W 3-1 to 3-2 BJB1396 LB-5100W SN5100W 6-1 to 6-3 BJB1396 LB-5100W SN5100W 2-1 to 2-4 DTS6208 LB-5100W SN5100W & 4-1 to 4-4 DTS6208 LB-5100W SN5100W W 7-1 to 7-4 DTS6208 LB-5100W SN5100W 8-1 to 8-2 DTS6208 LB-5100W SN5100W 9-1 to 9-4 ELS8308 LB-5100W SN5100W 10-1 to 10-4 ELS8308 LB-5100W SN5100W 5-1 to 5-3 LCF0451 LB-5100W SN5100W Program Version: V2.10.2.a.8.19.96 Report Printed At: 11:51:37 AM on 08/29/96 Total Pages: 4 Page 4:RSABS:V2.10.2.a.8.19.96 Page 19
Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Services g
~~-~~ } Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record Contents~~
'. Survey Area Survey Area ID: Survey Area Description Pages 1 D7300 Reactor / Turbine Building HVAC 2-3 i Survey Unit (s) Location Code Survey Unit Description Pages D73@ TZZZZ DZT01 Reactor / Turbine Building HVAC - D7300 TZZZZ DZE01 4-24 IIcating and Coolin8 D7300 TZZZZ DZE02 Prepared By: h 7 -
/ /O-24~ f 5 SEG EldiB16gical Engineer Date Reviewed By: U / ' ' [ 2 k4 SEG Project Radiation Protection Manager Date Approved By: ,_ ~ pout. A y; 4,or- / a/ze/rc ~PSCo Radiation Protection Manager Date
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Scientific Ecology Group, Inc. . gg
~~, Radiological Engineering & Decommissioning Services -~~~~
~~Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record - Survey Area Survey Area / Package ID: D7300 Survey Area~~
~~Description:~~
~~Reactor / Turbine Building HVAC Survey Package~~
~~Description:~~
Reactor / Turbine Building HVAC - Heating and Cooling The purpose of the reactor plant HVAC system was to ventilate various areas of the reactor building with heated or cooled air. Heat was provided from a hot (1207) water loop. Cooling was provided by two separate chilled water loops. These loops were directed to various tube and fin heat exchangers within air handlers throughout the reactor building. The scope of this package was to survey the unaffected water loops. Package 17300 surveyed the affected (i.e., ventilation) portions of the system. The hot and chilled water loops of the Reactor Plant Ventilation System were surveyed as an Unaffected System. Measurement locations were marked on maps to designate where sample j measurements were collected. Survey Area Operational History: The system was in operation prior to plant shutdown August 18, 1989. This system had no history of radioactive contamination in the hot and chilled water kx>ps. Survey Area Decommissioning and Remediation Activities: No radiological decommissioning or remediation was performed on the hot and chilled water l I loops of the Reactor Plant Ventilation System. Isolation and Control Measures: Level 2 Controls When appropriate, disassembled components were reassembled following survey. If reassembly was delayed or not performed, component openings were sealed with tape or l other appropriate material to maintain isolation control. This system was abandoned in place. Survey Area
~~Conclusions:~~
The results of total and removable surface activity measurements collected within this Survey Area meet the criteria for release for unrestricted use. The sample result of the removable g H-3/Fe-55 surface activity measurement was less than the Minimum Detectable Activity. t Page 2
P Survey Area
~~References:~~
~~1) Initial Radiological Site Characterization Report volumes 1,2,12.~~
O
2) System Description (SD-73) Reactor Plant Ventilation System

3) PI-73-(1-9)

4) Discussions with PSCo and Westinghouse Team personnel.
O 1 i l l l I l 1 0 ; i Page 3
Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Services -~~ Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record - Survey Unit Location Code: D7300 TZZZZ DZ Group ID Survey Area Number Surface Category Survey Unit Classification D 7300 System Internals DZ (Unaffected) Survey Reason: T01 - Initial Final Release E01 - Replacement Survey E02 - Replacement Survey Survey Unit
~~Description:~~
Survey Design: Measurement Type No. of Measurements Description D O Beta Scan N/A Scanned accessible internal surfaces of valve or piping at each location. Total Surface 32 Collected total surface activity measurements at Activity designated locations in 15 system components. Two measurements from location 10 and one measurement from location 11 were not able to i be collected due to obstructions. Survey location , 15 was added to provide 4 additional measurements. py Smears 31 Collected removable surface activi:y measurements at designated locations in 15 i system components. Special Samples 1 Removable tritium / iron-55 surface activity at su:vey location 1. 'O Page 4
Investigation #1 During the initial survey, the Minimal Detectable Activity measured at survey location 13 O exceeded the targeted MDA of 1,250 dpm/100 cm2 (download report 305-3). A replacement survey for total surface activity was performed under location code D7300 ZZZZZ DZE01. A longer count time of 5 minutes was used. The replacement survey MDA was less than 1,250 dpm/100 cm2 , The measurement results obtained from the replacement survey replaced the results of the initial final survey for survey location 13. Investigation #2 The survey measurement data for survey locations 4, 5, 8, 9,10 and 14 in package D7300 (Reactor Plant Ventilation System) did not meet the targeted MDA for unaffected systems of 1,250 dpm/100cm2 . The problem was attributed to a high background in the area of the plant where measurements were taken. Survey locations 4, 5, 8, 9,10 and 14 were re-surveyed with a count time twice the initial survey count time, under a replacement survey L3 code of DZE01. The MDA for locations 5,8,9, and 14 met the targeted criteria. The replacement data did not indicate any significant trends or elevated readings. The measurement results obtained from the replacement survey replaced the results of the initial final survey for locations 5, 8, 9 and 14. h The MDA for locations 4 and 10, however, did not meet the targeted criteria. An evaluation of the data found that the efficiency of the detector used for the replacement survey was 0.015, which was less than the 0.023 efficiency of the detector used during the initial survey. In order for the MDA to be met, a count time longer than first estimated was required. See Investigation
~~#4.~~
O Page 5
i I lavestigation #3 O More than 10% of the total surface activity measurements were greater than 1,250 dpm/100 cm2, i l 3 of the readings were at location 15 - Supply Return Header E7318 (download report 406-3) and one reading was at location 6 - Supply / Return Line to E-7519 (download report 251-3). The measurements were suspected to be elevated due to natural activity. An investigation survey was performed at location 15 (location 6 was similar to location 15), including a scan survey, and total surface activity measurement and a coupon sample at the area of highest elevated sctivity. i The investigation scan survey scan and total surface activity measurement at location 15 did not confirm the elevated activity found during the initial survey. The coupon sample was therefore not collected and was no longer required. A replacement survey was performed at survey locations 6 and 15 (see Investigation #5). Investigation #4 A Replacement survey was performed for locations 4 and 10 in package D7300 (Reactor Plant Ventilation System) since the initial survey results did not meet the targeted MDA for unaffected systems of 1250 dpm/100cm2 (downloads 390 and 367). The results of the replacement survey, however, also did not meet the targeted MDA (download 816-3). An evaluation of the data found that the efficiency of the detector used for the replacement survey was 0.015, which was less than the 0.023 efficiency of the detector used during the initial survey. In order for the MDA to be met, a count time longer than first estimated was required. A second replacement survey was performed at survey locations 4 and 10 with a count time of 20 minutes, which was 5 times greater than the initial survey count time. The MDA for locations 4 and 10 met the targeted criteria (download 824-3), however, background measurements were greater than the sample measurements. Due to the low efficiency of the detector, this resulted in highly negative activity readings (i.e., -1,700 to -2,000 dpm/100 cm2). The background I readings were within the normal background values for the detector, about 200120 cpm. A review of other background measurements taken with the same detector, LMI 43-98 S/N 123601, between the period 5/17/06 to 8/23/%, did not indicate a trend for biased high background results. The average efficieiwy of the detector for this time period was about 0.021, which was greater than the efficiency for the second replacement survey of locations 4 and 10, which was about 0.016. Since both the background measurements and detector efficiency were within normal ranges for l the detector, it was determined that the highly negative activity readings from locations 4 and l 10 were random results, which were amplified by the low efficiency of the detector. The j measureme.nt tesults obtained from the Replacement Survey replaced the results of the Initial Final Survey. O f Page 6
Investigation #5 More than 10% of the total surface activity measurements were greater than 1,250 dpm/100 cm2, O with the majority of the readings at location 15 - Supply / Return Header E7318 (download report 406-3), the remaining reading was at location 6 - 1.25" Supply / Return lines to E-7519 (download report 251-3). Because it was suspected that these readings were due to natural radioactivity, an investigation survey was performed (Investigation #3) for location #15 in order to find the area of highest elevated activity and to take a coupon sample of that area. However, the scan of the location did not confirm any areas of elevated activity. The highest activity identified was around 800 dpm/100 cm2 fixed. A Replacement survey was performed for locations 6 and 15 under the location code DZE01. The replacement survey data did not indicate any significant trends or elevated readings (i.e., measurements were less than 1,250 dpm/100 cm2 ). The measurement results obtained from the Replacement Survey replaced the results of the initial Final Survey for locations 6 and 15. O O Page 7
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Scientific Ecology Group, Inc. g Radiological Engineering & Decommissioning Services ==~ Fort St. Vrain Nuclear Generating Station Decommissioning Project Survey Location Summary t Description Location CdI M Number 00001 3 - TSA 6" V73533, P7309 Turbine Building level 10 3 - RSA discharge check valve West, C0039 00002 2 - TSA 4" V7364, S-7302S Bypass Reactor Building Ixvel 1, 2 - RSA Valve West, F0002 00003 4 FV7315. E7312S flow Turbine Building Level 10, 2 - TSA , control valve West, C0039 ' 2 - RSA 00004 2 - TSA 2.5" S7318 Chilled Water Reactor Building level 7, 2 - RSA Return Line SW of PCRV, F0084 00005 2 - TSA 4" V73597, S-7320S Bypass Reactor Building level 3 O' ' 2 - RSA Valve F0042 00006 1. enim Hne rom urMne Bunding kvel 8 3 - TSA Unit 11 eater E-7519 stairwell, C0035 3 - RSA 00007 1.5" Return line from Turbine Building level 11, 2N 11VAC Compressor Unit East, C0042 2 - RS A S-7325 00008 1 - TSA 1" T-7302 low level Turbine Building level 12, 1 - RSA switch drain East, C0044 00009 2 - TSA 1.25" T7304 Drain line Turbine Building Level 12, 2 - RSA East, C0044 00010 1 - TSA 3" S7317 Chilled Water RB level 7, SE of PCRV 1 - RSA return line F0089 Page 9
Measu u W8'I'" Description Number 00011 I - TSA 3" P-7302 Chilled Water Turbine Building Ixvel 11 1 - RSA Pump IB Discharge East, C0042 00012 3 - TSA 2.25" Supply Turbine Building level 11, 3 - RSA lines to E-7307 West, C0041 00013 1 - TSA 4"-6" P-7304 Service Water Turbine Building Ixvel 5, 1 - RSA Booster Pump Suction near elevator, C0018 00014 4" P7310 Chilled Water Building 3 3 - TSA Pump 1D Discharge 2 - RSA 00015 4 - TSA Return line from E-7318 Reactor Building Level 5 4 - RS A Supply / Return Header Southeast, F0077 O O Page 10
Scientific Ecology Group, Inc.
~~==~~~~
gg Radiological Engineering & Decommissioning Services Fort St. Vrain Nuclear Generating Station Decommissioning Project g Special Samples Location Code: D7300 ZZZZZ DZT01 Comments: H-3/Fe-55 activity reported in Net dpm/100 cm2 , Underlined values exceed the critical level Bold values exceed 250 dpm/100 cm2 Italic values exceed 1,000 dpm/100 cm2 Tritium / Iron-55 Removable Activity Samples Location # Type of Sample Critical Level MDA Activity 1-1 H-3/Fe-55 7.7 17.1 -4.1 0 l l l l l l O Page 11
7g Compilation of Statistical Summaries U Total Surface Activity - Beta Survey EM@@. r=::.= ::: ~ Removable Surface Activity - Beta Survey Location Code: D7300TZZZZDZ Medium Codes: B0020, B0023 Comments: Total Surface Activity (TSA) reported in Net dpm/100 cm2 Removable Surface Activity (RSA) reported in Net dpm/100 cm2 TSA RSA ( Upper Confidence Limit (UCL) 344.3 0.0 Mean 108.6 -1.1 Maximum 1,595.8 8.6 Minimum -2,065.6 -6.9 Standard Deviation 791.5 3.6 Minimum Detectable Activity 1,204.7 26.7 Critical Level 587.6 10.2 Samples Reported 32 31 l Samples Prescribed 32 31 l n U Page 1: ERGS:V2.11.1.a.9.6.96 Page 12
Statistical Summary Total Surface Activity - Beta Survey g gy=m, Location Code: D7300TZZZZDZ Survey Reasons: E01 - Replacement, E02 - Replacement, T01 - Initial Final Release Medium Codes: B0020, B0023 Net dpm/100 cm2 f)pper Confidence Limit (UCL) 344.3 l [ Mean 108.6 l l Maximum 1,595.8 l l Minimum -2,065.6 l l Standard Deviation 791.5 l l Minimum Detectable Activity 1,204.7 l l Critical Level 587.6 l l Sampies Reported 32l l Sampies Prescribed 32 l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 1,250.0 dpm/100 cm2 YES l Passed l Percent of Samples > 1,250.0 dpm/100 cm2 6.3 l Passed (3) l Number of Samples > 2,500.0 dpm/100 cm2 0 l Passed (4) l UCL of Mean less than or equal 5,000.0 dpm/100 cm2 YES l Passed (3) 10% Test (4) Single Measurement Test O Page 1:TSABS:V2.11.1.a.9.6.96 Page 13 FSR_ STAT.FSL
O Plant Systems Corrected Field Activity Values Total Surface Activity - Beta Survey
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Location Code: D7300TZZZZDZ Comments: Activity (net), MDA, and CL reponed dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm!!00 cm2 Count time reponed in seconds. Medium Download # Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0020 361-3 11 180 1,164.9 557.4 278.1 T01 1-2 1,194.6 572.2 -259.5 1-3 1,197.8- 573.8 241.0 2-1 831.3 390.6 -92.7 2-2 826.6 388.2 259.5 507-3 3-1 918.2 433.1 518.4 3-2 989.0 468.5 -230.4 824-3 4-1 1200 976.7 484.1 -1,800.0 E02 4-2 933.7 462.6 -2.065.6 821-3 5-1 360 555.9 263.8 -125.3 E01 5-2 619.2 295.5 -114.8 O 1 B0023 855-3 6-1 120 795 8 381.7 500.0 6-2 795.8 381.7 726.2 6-3 815.6 391.7 1.381.0 l 483-3 71 60 1,110.2 518.5 189.2 T01 l 7-2 1,005.8 466.3 729 7 l 803-3 8-1 120 530.9 249.0 341.5 E01 l 9-1 625.4 296.2 24.4 g_2 664.9 315.9 -268.3 824-3 10 1 1200 943.4 467.5 -1,731.2 E02 367-3 11 1 240 1,204.7 587.6 -108.7 T01 392-3 12-1 943.3 464.0 920.5 12-2 1,042.0 513.3 483.0 12-3 944.4 464.5 28.4 309-3 13-1 300 1,122.0 541.8 1.595.8 E01 802-3 14-1 360 975.9 472.6 429.6 14-2 920.1 444.7 -113.0
,A 14-3 824.8 397.1 -33.9 h 852-3 15-1 15-2 120 845.0 998.9 400.6 477.6 1.064.5 32.3 15-3 1,064.4 510.4 241.9 Page 2:TSABS:V2.11.1.a,9.6.%
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Plant Systems Corrected Field Activity Values Total Surface Activity - Beta Survey IISEId5 l
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Location Code: D7300TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 1.250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0023 852-3 15-4 120 1,033.6 495 0 435.5 E01 0 I l i Page 3:TSABS:V2.11.1.a.9.6.96 Page 15 l
O Graph of Activity versus Location Series Total Surface Activity - Beta Survey I-l5255 l r,.=,._2 4 Location Code: D7300TZZZZDZ Survey Reasons: E01 - Replacement, E02 - Replacement, T01 - Initial Final Release Medium Codes: B0020, B0023 J Average Guideline Value 5000.0 dpm/100 cm8 , 2500 2000-------------------------------------------------------------- 4 . 1500- ---- --- - --------------------- ------------ ---- --------------- i
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Background Correction Values Total Surface Activity - Beta Survey g
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Location Code: D7300TZZZZDZ Comments: Field Background (Bkg) reponed in cpm / detector area. Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download.#-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code 80020 361-3 1-1 02000 180 TM001 55.7 0.0 T01 1-2 58.7 1-3 59.0 2-1 27.3 2-2 27.0 507-3 3-1 31.3 3-2 36.7 824-3 4-1 02311 1200 221.7 E02 4-2 202.4 821-3 5-1 02000 360 19.7 E01 5-2 24.7 O B0023 855-3 6-1 02302 120 95.0 6-2 95.0 6-3 100.0 483-3 7-1 . 60 68.0 T01 7-2 55.0 803-3 8-1 120 TS001 38.5 E01 9-1 TM001 54.5 9-2 62.0 824-3 10-1 02311 1200 TS001 206.7 E02 367-3 11 1 240 135.0 T01 392-3 12-1 02310 TM001 308.0 12-2 377.0 12-3 308.7 309-3 13-1 02103 300 TS001 54.4 E01 802-3 14-1 360 TM001 53.8 14-2 47.7 14-3 38.0 852-3 15-1 02310 120 57.0 15-2 81.0 15-3 92.5 Page 5:TSABS:V2.I1.1.a.9.6.96 Page 17
I i O Background Correction Values Total Surface Activity - Beta Survey BESE gra m Location Code: D7300TZZZZDZ Comments: Field Background (Bkg) reponed in epm / detector area. i Medium Bkg reported in dpm/100 cm2 Count time reponed in seconds. Medium Code Icft justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0023 852-3 15-4 02310 120 TM001 87.0 0.0 E01 l l G U O Page 6:TSABS:V2.11.1.a.9.6.96 Page 18
Summary of Efficiency Values Total Surface Activity - Beta Survey g r>' m--- - Location Code: D7300TZZZZDZ Survey Reasons: E01 - Replacement, E02 - Replacement, T01 - Initial Final Release Comments: Detector Detector Download # Efficiency Model Serial Number -Station # SEG SP-113-3T PR024352 309-3 0.073 LMI 44-40B PR092645 361-3 0.116 LMI 43-98/300 PR117963 367-3 0.023 LMt 43-98/200 PR117963 392-3 0.044 i LMI 43-94/100 PR124111 483-3 0.037 LMI 44-40B PR092644 507-3 0.112 SEG SP-113-3T PR096177 802-3 0.076 LMI 43-94/100 PR124115 803-3 0.041 LMI 44-40B PR119454 821-3 0.103 LMI 43-98/300 PR123601 824-3 0.016 LMI 43-98/200 PR117963 852 3 0.031 LMI 43-94/100 PR124110 855-3 0.042 O Page 7:TSABS:V2.11.1.a.9.6.96 Page 19
J l 1 1 Survey Detection Equipment Used Total Surface Activity - Beta Survey i,g
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l Location Code: D7300TZZZZDZ Survey Reasons:' E01 - Replacement, E02 - Replacement, T01 - Initial Final Release Medium Codes: B0020, B0023 l Download # - Survey User ID M2350 S/N Detector Station Id S/N 309-3 LCF0451/126182 126182 PR024352 361-3 AOK2982/95359 95359 PR092645 367-3 BJB1396/95356 95356 PR117963 392-3 LCF0451/95356 95356 PR117963 1 0-483-3 CBA0876/126212 126212 PR124111 507-3 DAB 9854/95361 95361 PR092644 802-3 DLB6373/126210 126210 PR096177 803-3 AOK2982/117566 117566 PR124115 821-3 DAB 9854/117566 117566 PR119454 824-3 AOK2982/80498 80498 PR123601 852-3 P.M0028/98643 98643 PR117963 855-3 P M0028/98643 98643 PR124110 Program Version: V2.11.1.a.9.6.96 Report Printed At: 11:26.59 AM on 09/07/96 Total Pages: 8 Page 8:TSABS:V2.I1.1.a.9.6.96 Page 20
Statistical Summary Removable Surface Activity - Beta Survey g 7.;=m Location Code: D7300TZZZZDZ Survey Reason: T01 - Initial Final Release Medium Codes: B0020, B0023 Net dpm/100 cm2 l Upper Confidence Limit (UCL) 0.0 l l Mean -1.1 l l Maximum 8.6 l l Minimum -6.9 l l Standard Deviation 3.6 l l Minimum Detectable Activity 26.7 l l Critical Level 10.2 l l Samples Reported 31 l l Samples I rescribed 31 l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 250.0 dpm/100 cm2 YES l Passed l Percent of Samples > 250.0 dpm/100 cm2 0.0 l Passed (3) l Number of Samples > 500.0 dpm/100 cm2 0 l Passed (4) l UCL of Mean less than or equal 1,000.0 dpm/100 cm2 YES l Passed (3) 10% Test (4) Single Measurement Test O Page 1:RSABS:V2.11.1.a.9.6.96 FS A .FSt.
F i i (3 Plant Systems Corrected Field Activity Values - v Removable Surface Activity - Beta Survey BEFG ge,2. gc, Location Code: D7300TZZZZDZ Comments: Activity (net), MDA, and CL reponed dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 250.0 dpm/100 cm2 Italic values exceed 1,000.0 dpm/100 cm2 Medium RC# Location ID - MDA Critical Activity Reason Code Location # Level Code B0020 26.26559 1-1 22.6 8.2 -0.7 T01 26.26560 1-2 22.6 8.2 8.6 26.26561 1-3 22.6 8.2 -3.0 26.26562 2-1 22.6 8.2 -3.0 26.26563 2-2 22.6 8.2 -0.7 26.32403 3-1 25.5 9.6 -2.8 26.32404 3-2 25.5 9.6 -0.5 26.27822 4-1 23.6 8.7 -1.4 26.27823 4-2 23.6 8.7 0.9 26.32472 5-1 24.9 9.3 -6.9 26.32473 5-2 24.9 9.3 -2.3 [V, B0023 26.23071 6-1 26.7 10.2 -3.7 26.23072 6-2 26.7 10.2 -3.7 26.23073 6-3 26.7 10.2 -1.4 26.32470 71 24.9 9.3 -2.3 26.32471 7-2 24.9 9.3 -2.3 26.26564 8-1 22.6 8.2 -0.7 26.26565 g-1 22.6 8.2 8.6 26.26566 92 22.6 8.2 -3.0 26.26568 10 1 24.6 9.2 0.2 26.26571 11-1 24.6 9.2 0.2 26.28042 12-1 23 6 8.7 -1.4 26.28043 12-2 23.6 8.7 -3.7 26.28044 12-3 23.6 8.7 -1.4 26.23747 13-1 21.1 7.4 7.2 26.27314 14-1 25.8 9.8 1.6 26.27315 14-2 25.8 9.8 -5.3 O d 26.28746 26.28747 15-1 15-2 22.9 22.9 8.3 8.3
-0.9 -5.6 26.28748 15-3 22.9 8.3 3.2 26.28749 15-4 22.9 8.3 .0.9 Page 2:RSABS:V2.11.1.a.9.6.%
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Graph of Activity versus Location Series - l Removable Surface Activity - Beta Survey p,.=[$3@$ =. Location Code: D7300TZZZZDZ Survey Reason: T01 - Initial Final Release Medium Codes: B0020, B0023 Guideline Value 1000.0 dpm/100 cm' 275 225- ---- - ---- ----- ---- ---------------------- -------- ---------- 175- ------------------------------- ------------------------------------ n 8 8
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Laboratory Equipment Used - Removable Surface Activity - Beta Survey r.-- A .
~~. . l Location Code: D7300TZZZZDZ Survey Reason: T01 - Initial Final Release Medium Codes: B0020, B0023 i~~
1 Location Range Survey User ID Laboratory Serial Equipment Number 7-1 AOK2982 LB-5100W SN5100W 15-1 AOK2982 LB-5100W SN5100W 6-1 BJB1396 LB-5100W SN5100W O 13-1 BJB1396 LB-5100W SN5100W 14-1 BJB1396 LB-5100W SN5100W 5-1 DAB 9854 LB-5100W SN5100W 3-1 JMS1149 LB-5100W SN5100W 4-1 LCF0451 LB-5100W SN5100W l 10-1 LCF0451 LB-5100W SN5100W 11-1 LCF0451 LB-5100W SN5100W , l 12-1 LCF0451 LB-5100W SN5100W 1-1 PDG1526 LB-5100W SN5100W 2-1 PDG1526 SN5100W
LB-5100W I 8-1 PDG1526 SN5100W LB-5100W 9-1 PDG1526 SN5100W LB-5100W l
~~Program Version: V2.11.1.a.9.6.96 l Report Printed At: 11:33:41 AM on 09/07/96 Total Pages: 4 Page 4:RSABS:V2.11.1.a.9.6.% Page 24 FSR.LSYS.FS~~
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Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record Contents Survey Area Survey Area ID: Survey Area Description Pages "I "* C"" "8' "' " ^' 2-4 D7500 System 75 Survey Unit (s) Location Code Survey Unit Description Pages D7501 TZZZZ EZTV1 Turbine Vents & Drains, Control Room HVAC 5-36 E D7501 TZZZZ EZR01 Prepared By: U [u SEG Radiofogical Engineer
- / /O fd Date Reviewed By: b8 SEG Project Radiation Protection Manager / Io [M / 'f4 Date Approved By: w d 44 Mz &ur / /s/z e /94' PSCo Radiation Protection Manager Date O
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~~Fort St. Vrain Nuclear Generating Station Decommissioning Project (~~
~~,w Release Record - Survey Area Survey Area ID: D7500 Survey Area~~
~~Description:~~
Turbine Vents & Drains, Control Room HVAC, System 75 Survey Area Packages: This Survey Area was segregated and surveyed in accordance with the following survey packages: D7501 Turbine Vents & Drains, Control HVAC D7502 Turbine Building Ventilation D7503 QC Survey for Survey Package D7501 (Turbine Vents & Drains, Control Room HVAC) Package D7501 was used to survey Control Room and Service Building ventilation and the Turbine Building vents and drains. This survey unit was originally classified as unaffected, but, l due to elevated activity found during final survey in the Control Room and Service Building ventilation filters that exceeded reclassification criteria, was reclassified as an affected plant system survey unit. This survey unit was randomly selected to have a QC Verification survey performed which was accomplished with package D7503. Measurement locations are indicated C] on the attached drawing and location table. i Package D7502 was used to survey the Turbine Building ventilation system. This system was initially classified as an affected plant system due to elevated activity found in the ventilation system filters and heat exchangers during characterization surveys. Measurement locations are , indicated on the attached drawing and location table. Survey Area OperationalIllstory: The Turbine Vents & Drains, Control Room HVAC System was in operation prior to plant shutdown August 18,1989. Primary purposes were: 1) to convey the various vents, drains and relief valve discharges from the turbine building equipment and piping to atmosphere, to waste, to the drain collector tank, or to the condenser as required; 2) to provide hot water for use in heating the building spaces in the reactor and turbine plants; and 3) to provide filtered, heated and/or cooled, humidified or dehumidified air to the control room, reactor engineer's office, auxiliary electrical equipment room, 480V switchgear room, and service building. Prior to commencement of characterization and final surveys, this system had no history of radioactive contamination. O Page 2
Survey Area Decommissioning and Remediation Activities: For D7501, Control Room and Service Building HVAC air handling unit prefilters and sock O filters were replaced due to elevated activity found during final survey. The survey of locations 45 (Control Room ventilation filter), and 48 (Service Building ventilation filter), indicated 2 2 elevated readings that range from about 1,700 dpm/100 cm to 3,300 dpm/100 cm , which exceeded unaffected system reclassification criteria. The elevated readings were confined to the prefilter and sock filter elements where concentration of activity could occur over a long period of time. No elevated activity was found in the ventilation ducting or air handling unit or filter housings. D7501 was therefore reclassified as an affected plant system survey unit. More detailed information is found in Investigation #1 of this release record. For D7502, characterization surveys indicated elevated activity on ventilation filters and heat exchangers (which due to a buildup of dust / debris also acted as filters). Characterization survey results indicated total surface activity as high as about 8,800 dpm/100 cm'. While much of this activity was determined to be due to natural radioactivity (i.e., radon daughters), Co-60 and Cs-137 were also identified in gamma isotopic analysis performed on removed dust / debris and filter elements. Therefore, the filters were replaced and the heat exchangers (which could not be thoroughly cleaned and surveyed) were removed. As a result of the characterization activities this survey unit was surveyed as an affected plant system survey unit. Final characterization survey results are also included in the survey data for this survey unit. Isolation and Control Measures: Level 2 Controls Access doors / covers were replaced upon completion of survey of ventilation components and O Level 2 Isolation and Control labels were placed adjacent to access points. For Turbine Building drains, Level 2 Isolation and Control labels were also placed at sump and drain tank openings. This system is in use and will remain in service during repowering. Survey Area
~~Conclusions:~~
For both packages D7501 and D7502, the results of total and removable surface activity measur - ollected within this survey area meet the criteria for release for unrestricted use. The L. % iemovabic H-3 and H-3/Fe-55 detected were well below the administrative action level for removable Fe-55 and H-3 activity. The QC Verification survey performed with package D7503 supports the conclusion that survey unit D7501 is acceptable for release for unrestricted use. A survey data comparison graph of the Initial Final Survey and QC Verification measurements is provided in the release record for D7503. O Page 3
I Survey Area
~~References:~~
1) Initial Radiological Site Characterization Report volumes 1,2 and 13.

2) System Description (SD-75) Turbine Building Vent and Drain, Building Hot Water Heating, Control Room and Service Building HVAC

3) PI-75-1, 2, 3, 4, 5, 8, and 9, and PF-75-1, 2, 3, 4, 8, and 10

4) DI-067

5) Discussion with PSCo and Westinghouse Team personnel l
I I I 1 1 1 i l O , Page 4
T l Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Services gg
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Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record - Survey Unit Location Code: D7501 TZZZZ EZ Group ID Survey Area Number Surface Category Survey Unit Classification D 7500 System Internals EZ (Affected) Survey Reason: T01 - Initial Final Survey G01 - Investigation G02 - Investigation R01 - Remediation Survey Unit
~~Description:~~
Turbine Vents & Drains, Control Room HVAC Survey Design: Measurement Type No. of Measurements Description Beta Scan N/A Scan accessible internal surfaces of each system component. At least 25% of accessible component and pipe internal surfaces were scanned at each survey location. No areas of significantly elevated activity were identified. Total Surface 99 Collected total surface activity measurements at Activity designated locations in 30 plant system components. py Smears 93 Collected removable surface activity measurements at designated locations in 30 plant system components. Special Samples 1 Removable 'H smear was collected at survey location 41. 8 Sediment samples were distributed evenly across sump and tank bottoms at locations 41 and 43. 2 Scale samples were collected from locations 72 and 74. Page 5
Survey Unit Investigations: k Investigation #1 The survey of locations 45, the Control Room ventilation filter, and 48, the Service Building ventilation filter, indicated elevated readings that ranged from about 1,700 dpm/100 cm2 to 3,300 dpm/100 cm 2. The elevated readings were confined to the prefilter elements and sock filter elements. An investigation was performed on locations 45 and 48 in accordance with FSV-FRS-TBD-208, Revision 0, to determine if the elevated activity was due to non-licensed radionuclides (i.e., radon daughter products). Samples of the filters were placed in I liter containers for gamma spectroscopy analysis. To be conservative the total activity for each sample was assumed to be from an area of 100 cm 2, even though the actual area ranged from approximately 900 cm2 to 1800 cm2. This resulted in a calculated licensed activity range of about 3,200 dpm/100 cm2 to 25,000 dpm/100 cm2 (i.e., over estimated due to the larger area). Since the elevated readings could not be confirmed to be due to non-licensed material, the initial readings were considered to be licensed material activities. This required survey unit D7501 to be reclassified as an affected plant system. Additional survey of the survey unit l was conducted in order to meet the requirements for survey of an affected plant system (see l Investigation #5). [ Investigation #2 A deep sink and drain trap which drains to system 75 was identified as having elevated readings during Surface and Structure survey C0026 on level 7 of the Service Building. Investigation surveys were performed on the sink drain trap (location 71) and a similar sink drain trap (location 72) using a survey reason code of G01. The investigation surveys indicated total surface activities at locations 71 and 72 of 3150 and 2940 dpm/100 cm2 , respectively. Sediment samples taken at locations 71 and 72 indicated a total licensed nuclide content (predominately Co-60) of 165 pCi/g for location 71 and 5 pCi/g for location 72. Investigation #3 was initiated to conduct further action. 1 O l Page 6
Investigation #3 Elevated activity was found at locations 71 and 72, which were sink traps thought to lead to the Turbine Building Sump that is a part of D7501. Because of the detected activity, the deep sink and drain trap at location 71 were disposed of as radioactive waste and the measurements taken at location 71 were removed from the database. For location 72, the initial investigation survey was performed with a detector that could not be fully inserted into the drain trap. Therefore, a second investigation survey, using a reason code of G02, was conducted with a GM detector assembly that could access the trap. The second investigation survey did not indicate higher activity that the first investigation survey and because both 2 surveys were below affected system action levels (i.e., 3,000 dpm/100 cm ), no further action was necessary. Both the initial investigation (G01) and backup investigation (G02) survey measurements remain in the survey database. To bound the elevated activity found at location 71, additional investigation surveys using a reason code of G01 were conducted. Survey location 73 was designated in the piping immediately downstream of the location 71 deep sink. The piping and branch piping downstream of location 71 was full of sediment. This prevented the collected of removable and surface activity measurements; therefore, sediment samples were taken at various locations in the piping to bound and define the extent of elevated activity in the piping. Eleven sediment samples were collected during this investigation. Although the location 72 sink trap and lines were below action levels, location 74 was also added downstream of the location 72 sink line to take additional measurements. The measurements collected at location 74 were below affected system action levels. During the investigation of location 71 sink drain lines (i.e., location 73), it was determined that these drain lines actually drain to the sanitary sewage system (D4402) and not to the Turbine Building Sump (as originally thought). Therefore, this investigation was completed and Investigation #1 of survey package D4402 written to conduct further investigation. Survey results for location 71 (which was removed) and location 73 (which further investigation was conducted in package D4402) are not included in this report. Investigatior #4 During investigation #3, a sediment sample was collected from a system 75 drain line cleanout in the overhead on level 7 of the turbine building, survey area C0027. This drain line leM to the Turbine Building Sump, which is part of package D7501. Gamma sparoscopy analysis indicated that Co-60 was 4.65 pCi/g and Cs-137 was 1.75 pCi/g. All additional material was removed from the cleanout and disposed of as radioactive waste. The cleanout and an associated floor drain line were surveyed for total and removable surface activity. Total surface activity measurements were below 1250 dpm/100 cm2 and removable surface activity measurements were below 150 dpm/100 cm 2
~~. No further action I was necessary. !~~
l Page 7 i
1 / Investigation #5 During initial final survey of locations 45 and 48, elevated readings as high as 3,258 dpm/100 cm2 were detected. Locations 45 and 48 are ventilation filter banks (a concentration point for particulate material). Isotopic analysis of filter samples indicated the : i presence of Co-60 and Cs-137 above action levels. Survey unit D7501 was subsequently j reclassified as an affected plant system survey unit. j The existing filters were removed and disposed of as radioactive waste. New filters were j installed, then the system was operated for several weeks before the remediation survey was
~~performed to ensere that a problem with build up of licensed material did not exist.~~
~~Additionally, survey locations 51 through 70 were added to D7501 to meet affected system~~
~~survey requirements.~~
! I Remediation survey results at locations 45 and 48 were below the guideline values for
affected plant systems. Initial final survey measurements for locations 45 and 48 were replaced by the remediation survey results in the active final survey data base. Survey locations 51 through 70 did not indicate activity above affected plant system action levels.
investigation #6 1 1 During initial final survey of locations 46 and 49, the control room and service building air handling units, a 25% scan was performed on accessible internal surfaces. Although the required number of fixed point measurements were collected, the survey instructions required a scan survey on all accessible internal surfaces. In order to complete the initial final survey, another scan survey was performed on all
~~accessible internal surfaces of the control room and service building air handling units.~~
4 The scan survey indicated no areas of elevated activity. 1 1 i 2 O Page 8 i
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Scientific Ecology Group,Inc. g Radiological Engineering & Decommissioning Services ~~~ Fort St. Vrain Nuclear Generating Station Decommissioning Project m) i Survey Location Summary at Description Location Number CI 41 6 - TSA T7501 - Turbine Bldg. Sump TB-L5 (4784') 6 - RSA 1 'H 4 - Sediment 42 4 - TSA T7505 - Misc. Drain Tank TB-L5 (4784') 4 - RSA 43 6 - TSA PSC Turbine Bldg. Oil Separator Yard west of Turbine Bldg. 6 - RSA Tank 4 - Sediment 44 1 - TSA Discharge Spool Piece Pump TB-L5 (4784') 1 - RSA P7505 45 6 - TSA F7503 - Control Room Vent TB-L8 (4846') O 6 - RSA Filter 46 6 - TSA S7504 - Control Room Air TB-L8 (4846') 6 - RS A Handling Unit 47 2 - TSA F7502 - Control Room Make Up TB-L8 (4846') 2 - RSA Vent Filter 48 6 - TSA F7505 - Service Bldg. Vent TB-L7 (4829') 6 - RSA Filter 49 6 - TSA S7509 - Service Bldg. Air TB-L7 (4829') 6 - RSA Handling Unit 50 2 - TSA l" L75601-D25 downstream of TB-L8 (4846') 1 - RSA valve V75556 51 6 TSA Ventilation plenum downstream TB-L8 southeast 6 - RSA of fan C7505 52 2 - TSA Fan C7505 suction plenum TB-L8 southeast 2 - RSA 53 3 - TSA Ventilation plenum downstream TB-L8 southeast 3 - RS A of DV-75303 Page 10
Survey Location Summary (Continued): O L t on Me " " Description Location CI d Number 54 3 - TSA Ventilation p'.enum downstream TB-L8 3 - RSA of DV-7532'/ and DV-75328 55 6 - TSA Filter F75f>3 suction plenum TB-L8 southeast 6-MSA 56 2 TSA Control Room ventilation supply TB-L8 southeast 2 - RSA pienum 57 2 - TSA Control Room supply duct TB-L8 southeast 2 - RSA upstream of DV-75323 58 1 - TSA Control Room supply duct TB-L8 southeast 1 - RSA upstream of DV-75324 59 2 - TSA Control Room supply duct TB-L8 southeast 2 - RSA upstream of DV-75325 60 1 - TSA Reactor Engineers Office supply TB-L8 1 - RSA duct upstream of DV-75326 61 Auxiliary Electrical Equipment TB-L8 2 - TSA Room supply duct upstream of 2-RSA DV-75329 .. 62 Auxiliary Electrical Equipment Tb-L6 northeast 2 - TSA Room supply duct downstream 2 - RSA ! of DV-75329 l 1 63 1 - TSA #2 Battery Room supply duct TB-L5 northeast l 1 - RSA 64 1 - TSA #2 Battery Room exhaust duct TB-L5 northeast i 1-RSA l 65 3 - TSA Filter F7505 suction plenum Service Building L7 north 3-RSA 66 3 - TSA Air handling unit S7505 supply Service Building L7 north 3 - RSA plenum 67 2 - TSA Supply duct to level 5/6 stairwell Service Building L5 overhead l 2 - RSA l 68 1 - TSA Supply duct to Electrical Shop Service Building L5 1-RSA O Page11
Survey Location Summary (Continued): ; I' Description Location Number 69 1 - TSA Southeast ventilation register in Service Building L6 north 1 - RSA the HP Break Room on Ixvel 6 i 70 1 - TSA North ventilation register in the Service Building L7 1 - RSA Engineers Office on level 7 l 72 2 - TSA 3" deep sink drain trap Service Building L6, Survey ~ 1 - RSA Area C0019 1 - Scale 74 1 - TSA 3" deep sink drain line Service Building L6, Survey 1 - RSA Area C0019 l 1 - Scale 75 2 - TSA 3" floor drain cleanout Turbine Building L7 north l 1 - RSA Survey Area C0027 76 4 - TSA 6" floor drain line Turbine Building L8 1 - RSA Survey Area C0034 g Note: location numbers 1-40 were used in package D7502. location 71 was removed and location 73 was investigated in package D4402. I i i i l 1 1 5 i O Page 12
Scientific Ecology Group,Inc. ~g RadiologicalEngineering & Decommissioning Services -~~ Fort St. Vrain Nuclear Generating Station Decommissioning Project Special Samples Location Code: D7501 TZZZZ EZT01 D7501 TZZZZ EZG01 Comments:
'H activity reported in Net dpm/100 cm2 Sediment and Scale activity reported in pCi/g Underlined values exceed the critical level Bold 'H/"Fe values exceed 30,000 dpm/100 cm2 Italic 'H/"Fe values exceed 40,000 dpm/100 cm2 Removable Tritium Activity Sample Location # Type of Sample Critical Level MDA Activity 41-1 'H I10.0 225.1 -7.8 Sediment Samples Location # Licensed Critical Level MDA Activity Nuclides Identitled 41-1 Co-60 9.20E-02 1.92E-01 3.06E-1 41-2 None 8.44E-02* 1.81E-Ol
N/A 41-3 Co-60 9.35E-02 2.02E-01 3.52E4I Cs-137 8.86E-02 1.88E-01 2.23E-01 41-4 Co-60 5.llE-02 1.06E 01 1.54E-01 43-1 Co-60 2.62E-02 5.80E-02 7.29E-02 43-2 None 8.83E-02* 1.87E-Ol

N/A 43-3 None 4.27E-02* 9.09E-02* N/A 43-4 None 2.14E-02* 4.52E-02* N/A

Critical level and MDA reported for Co-60 O
Page 13
Comments on Sediment Samples O The Cs-137 and Co-60 concentrations detected in the sediment samples in package D7301 were all below NUREG 1500 values corresponding to 10 mrem /yr for soil. NUREG 1500 values (10 mrem /yr) for Cs-137 and Co-60 are 7.13 pCi/g and 1.98 pCi/g, respectively. Results were compared to soil values in NUREG 1500 because, should this material ever be released to the environment, deposition in soil is the most likely scenario. Scale Samples Location # Licensed Critical Level MDA Activity Nuclides Identitled 72-1 Co-60 1.12E 01 2.42E-01 2.89 Cs-137 1.01E-01 2.16E-01 2.27 74-1 Co-60 1.71E-01 3.77E41 6.25 Cs-137 1.63E-01 3.50E-01 1.51 Comments on Scale Samples Analysis of slight amount of scale present at locations 72 and 74 detected low levels of licensed
~~, material; however, total and removable surface activity measurements taken at locations 72 and 74 were well below affected system unrestricted use release criteria.~~
l I n v Page 14
Compilation of Statistical Summaries Total Surface Activity - Beta Survey NM@[5I
~~._a ~~~
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Removable Surface Activity - Beta Survey Location Code: D7501TZZZZEZ Medium Codes: B0002, B0018, B0019, B0023, B0037, B9999 Comments: Total Surface Activity (TSA) reported in Net dpm/100 cm2 Removable Surface Activity (RSA) reported in Net dpm/100 cm2 TSA RSA Upper Confidence Limit (UCL) Mean 473.0 365.7 2.6 1.6 h Maximum 2,937.5 28.0 Minimum -1,337.5 -6.9 Standard Deviation 638.8 6.0 Minimum Detectable Activity 1,678.9 26.1 Critical Level 822.5 9.6 Samples Reported 99 93 l Samples Prescribed 99 93 l I 1 l 9, 1 l Page 1: ERGS:V2.16.1.a.10.7.96 Page 15 i
i (m \- Statistical Summary Total Surface Activity - Beta Survey gggg
~~;ip=--; _~~
Location Code: D7501TZZZZEZ Survey Reasons: G01 - Investigation, G02 - Investigation, R01 - Remediation, T01 - Initial Final Release Medium Codes: B0002, B0018, B0019, B0023, B0037, B9999 i Net dpm/100 cm2 l Upper Confidence Limit (UCL) 473.0 l l Mean 365.7 l l Maximum 2,937.5 l l Minimum -1,337.5 l g l Standard Deviation 638.8 l l V- l Minimum Detectable Activity 1,678.9 l l Critical Level 822.5 l l Samples Reported 99l l Samples Prescribed 99l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l l MDA < 3,000.0 dpm/100 cm2 YES l Passed l Percent of Samples > 3,000.0 dpm/100 cm2 0.0 l Passed (5) l Number of Samples > 4,000.0 dpm/100 cm2 0 l Passed (6) l UCL of Mean less than or eqt al 4,000.0 dpm/100 cm2 YES l Passed j (5) 25% Test i (6) Single Measurement Test A ! U ! Page 1:TSABS:V2.16.1.a.10.7.96 Page 16 1 FSR_ STAT FSL l
Plant Systems Corrected Field Activity Values
-IS@@S Total Surface Activity - Beta Survey r..=, m-Location Code: D7501TZZZZEZ Comments: Activity (net). MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level.
Bold values exceed 3,000.0 dpm/100 cm2 Italic values exceed 4,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # . Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0002 521-3 41-1 15 746.3 351.9 -155.2 T01 41-2 695.3 326.4 393.8 41-3 753.9 355.7 95.7 41-4 612.5 285.0 566.3 41-5 719.3 338.4 252.6 41-6 598.3 277.9 613.4 538-3 43-1 828.9 392.5 509.8 43-2 825.3 390.7 1.237.0 43-3 857.2 406.7 736.0 43-4 857.2 406.7 -443.8 43-5 891.2 423.7 218.9 43-6 795.8 376.0 396.6 B0018 174 3 47-1 592.1 276.5 14.4 47-2 608.1 284.5 -28.8 3"5-3 51-1 569.8 264.2 260.3 51-2 519.4 238.9 444.0 51 3 584.0 271.3 229.7 51-4 624.6 291.6 -153.1 51-5 560.1 259.3 275.6 51-6 597.9 278.2 137.8 52-1 545.2 251.9 91.9 52-2 574.6 266.5 -45.9 53-1 574.6 266.5 122.5 53-2 682.6 320.6 -107.2 53-3 519.4 238.9 168.4 54-1 480.6 219.6 199.0 54-2 486 4 222.4 183,7 , 54-3 514.0 236.3 -107.2 55-1 628.9 293.7 290.9 55-2 606.9 282.7 15.3 55-3 574.6 266.5 306.2 55-4 602.4 280.5 -76.6 Page 2:TSABS:V2.16.1.a.10.7.96 Page 17
~~... no.- .~~
1 Plant Systems Corrected Field Activity Values - [ Total Surface Activity - Beta Survey MN gymn 1 i Location Code: D7501TZZZZEZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 l Underlined values exceed the critical level. 1 Bold values exceed 3,000.0 dpm/100 cm2 Italic values exceed 4,000.0 dpm/100 cm2 ' Count time reported in seconds. j Medium Download # Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0018 375-3 55-5 15 545.2 251.9 367.5 T01 55-6 569.8 264.2 275.6 56-1 565.0 - 261.7 137.8 56-2 602.4 280.5 15.3 57-1 503.2 230.8 91.9 57-2 480.6 219.6 137.8 i 58-1 480.6 219.6 -61.2 59-1 514.0 236.3 107.2 , 59-2 503.2 230.8 107.2 l 60-1 584.0 271.3 107.2 61-1 480.6 219.6 168.4 O 376-3 61-2 62-1 62-2 474.8 596.2 636.3 216.7 277.2 297.3 0.0 369.2 430.8 63-1 661.6 310.0 30.8 64-1 623.2 290.8 276.9 383-3 65-1 746.7 352.6 1.071.8 65-2 678.7 318.6 2.342.6 65-3 702.1 330.3 2.021.1 66-1 662.5 310.5 168.4 66-2 788.6 373.6 -229.7 66-3 781.8 370.2 -183.7 67-1 774.9 366.7 321.5 67-2 768.0 363.2 229.7 68-1 650.2 304.3 168.4 69-1 732.2 345.3 275.6 70-1 821.9 390.2 842.1 B0019 443-3 42-1 587.8 272.8 155.3 42-2 583.0 270.4 264.1 42-3 587.8 272.8 264.1 42-4 537.6 247.7 -31,1
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~~Page 3:TSABS:V2.16.1.a.10.7.96 Page 18~~
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Plant Systems Corrected Field Activity Values r=== l EMrdFM Total Surface Activity - Beta Survey f,.g.=.y.n Location Code: D7501TZZZZEZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 3,000.0 dpm/100 cm2 Italic values exceed 4,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # . Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0023 130 3 44-1 15 853.9 399 0 -41.3 T01 335-3 50-1 120 332.4 156.9 -68.5 50-2 312.4 146.9 -27.4 704-3 72-1 240 1,678.9 822.5 2 937.5 G01 845-3 72-2 600 792.7 387.1 1.532.8 G02 843-3 74-1 240 1,577.0 771.6 -1,337.5 G01 2040-3 75-1 300 1,257.1 612.6 -317.6 75-2 1.298.0 633.1 1.058.8 1912-3 76-1 975.5 470.7 880.1 76-2 925.1 445.5 -138.3 76-3 923.1 444.5 62.9 76-4 871.6 418.8 226.3 80037 174-3 46-1 15 642.7 301.8 __BDZ.2 T01 46-2 579.8 270.4 720.7 46-3 616.0 288.5 -14.4 46-4 452.5 206.7 663.1 46-5 678.8 319.9 -57.7 46-6 661.0 311.0 86.5 179-3 49 1 673.1 316.7 73.4 49-2 680.5 320.3 161.5 49-3 639.1 299.7 146.8 49-4 581.9 271.0 880.7 49-5 627.3 293.8 29.4 49-6 573.2 266.7 102.8 O Page 4:TSABS:V2.16.1.a.10.7.96 Page 19
t / Plant Systems Corrected Field Activity Values '( Total Surface Activity - Beta Survey l-[$25$ i g;=,.ra Location Code: D7501TZZZZEZ Comments: Activity (net), MDA, and CL reponed dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 3,000.0 dpm/100 cm2 Italic values exceed 4,000.0 dpm/100 cm2 Count time reponed in seconds. Medium Download # . Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B9999 373-3 45-1 15 686.3 321.8 63.1 R01 45-2 730.7 344.0 47.3 l 45-3 698.7 328.0 409.9 45-4 581.7 269.5 141.9 45-5 660.7 309.0 141.9 45-6 638.6 297.9 -157.6 389-3 48-1 654.5 307.3 1.996.3 48-2 712.4 336.3 983.5 48-3 709.0 334.6 2.113.8 48-4 726.2 343.2 _ 1.834.9 48-5 631.3 295.7 1.541.3 , I 48-6 701.9 331.1 _ 1.834.9 O\
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?\ V Page 5:TSABS:V2.16.1.a.10.7.% qapj0 n,
l
=
Graph of Activity versus Location Series Total Surface Activity - Beta Survey gems FMMBii Location Code: D750lTZZZZEZ l Survey Reasons: G01 - Investigation, G02 - Investigation, R01 - Remediation, T01 - Initial Final Release Medium Codes: B0002, B0018, B0019, B0023, B0037, B9999 Average Guideline Value 4000.0 dpm/100 cm2 4 000 - e++-,-,s+++ , ==+=,:=- =:=- ==+-=-- =+ .
=
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Page 6:TSABS:V2.16.1.a.10.7.96 GRFSL g g g i
O Graph of Activity versus Location Series d Total Surface Activity - Beta Survey
~~-M =.= ,. g._~~
Location Code: D7501TZZZZEZ Survey Reasons: G01 - Investigation, G02 - Investigation, R01 - Remediation, T01 - Initial Final Release Medium Codes: B0002, B0018, B0019, B0023, B0037, B9999 Average Guideline Value 4000.0 dpm/100 cm2 4000 - r .-*** em- rr-1 35004----------------------------------------------------------.----- 3000------- ------------------------------------------------ ----------- 2500
----------------------------------------------------\----------- e O "b 2000-. --------------------------------- ------- *--------- - - * - - - - - - - - - - - \ \
8 1500------------- -------- --- --------- - - ------------- 1000---- *
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~~1000__-... _.--- ______ __... ._ _______ __- .-___...__._ . ___ ______._~~
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~~Location Series~~
-- --- Critical level -.- MDA --+- Average Guideline Value -.- Activity Page 7:TSABS:V2.16.1.a.10.7.96 Page 22 GRFSL7L8 FSL
~~Background Correction Values Total Surface Activity - Beta Survey g~~
~~,yray,,,,, _~~
Location Code: D7501TZZZZEZ Comments: Field Background (Bkg) reported in cpm / detector area. Medium Bkg reponed in dpm/100 cm2 Count time reponed in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0002 521-3 41-1 02200 15 TM001 372.0 767.0 T01 41-2 320.0 41-3 380.0 41-4 244.0 41-5 344.0 41-6 232.0 538-3 43-1 436.0 43-2 432.0 43-3 468.0 43-4 468.0 1 43-5 508.0 43-6 400.0 B0018 174-3 47-1 02201 272.0 0.0 47-2 288.0 375-3 51-1 02200 220.0 51-2 180.0 51-3 232.0 51-4 268.0 51-5 212.0 51-6 244.0 52-1 200.0 52-2 224.0 53-1 224.0 53-2 324.0 53-3 180.0 l 54-1 152.0 54-2 156.0 54-3 176.0 55-1 272.0 55-2 252.0 55-3 224.0 55-4 248.0 Page 8:TSABS:V2.16.1.a.10.7.96 Page 23
l l '/D Background Correction Values - O Total Surface Activity - Beta Survey pSbe n $s , I Location Code: D7501TZZZZEZ Comments: Field Background (Bkg) reported in epm / detector area. Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0018 375-3 55-5 02200 15 TM001 200.0 0.0 T01 55-6 220.0 56-1 216.0 56-2 248.0 57-1 168.0 57-2 152.0 58-1 TS001 152.0 59-1 TM001 176.0 59-2 168.0 60-1 TS001 232.0 61-1 TM001 152.0 ,
/O 61-2 148.0 1 V 376-3 62-1 62-2 02201 240.0 276.0 63-1 TS001 300.0 64-1 264.0 383-3 65-1 TM001 392.0 65-2 320.0 65-3 344.0 66-1 304.0 66-2 440.0 66-3 432.0 67-1 424.0 67-2 416.0 68-1 TS001 292.0 69-1 376.0 70-1 480.0 B0019 443-3 42-1 TM001 228.0 42-2 224.0 42-3 228.0 42-4 188.0 f%
U-Page 9:TSABS:V2.16.1.a.10.7.96 Page 24
Background Correction Values IBMBE Total Surface Activity - Beta Survey r. = ,. a- -2 Location Code: D750lTZZZZEZ Comments: Field Background (Bkg) reported in epm / detector area. Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0023 130-3 44-1 02202 15 TS001 276.0 0.0 T01 335-3 50-1 02301 120 TM001 48.5 50-2 42.5 704-3 72-1 02311 240 TS001 200.0 G01 845-3 72-2 02134 600 60.2 G02 843-3 74-1 02311 240 176.0 G01 2040-3 75-1 300 TM001 100.2 75-2 107.0 1912-3 76-1 02101 51.8 76-2 46.4 76-3 46.2 76-4 41.0 S B0037 174-3 46-1 02201 15 324.0 T01 46-2 260.0 46-3 296.0 46-4 152.0 46-5 364.0 46-6 344.0 179-3 49-1 02200 344.0 49-2 352.0 49-3 308.0 49-4 252.0 40-5 296.0 49-6 244.0 0 Page 10:TSABS:V2.16.1.a.10.7.96 Page 25
l l O Background Correction Values Total Surface Activity - Beta Survey I i Nd@$ Location Code: D7501TZZZZEZ f Comments: Field Background (Bkg) reported in epm / detector area. , Medium Bkg reported in dpm/100 cm2 ; Count time reported in seconds. ! Medium Code left justified under Download #-Station # colutst. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B9999 , 373-3 45-1 02200 15 TM001 308.0 0.0 RO1 i 45-2 352.0 45-3 320.0 45-4 216.0 45-5 284.0 45-6 264.0 J 389-3 48-1 324.0 1 48-2 388.0 48-3 384.0 48-4 404.0 48-5 300.0 48-6 376.0 i I Ch V Page 11:TSABS:V2.16.1.a.10.7.96 Page 26
Summary of Efficiency Values Total Surface Activity - Beta Sur, g gy=.aa- . Location Code: D7501TZZZZEZ Survey Reasons: G01 - Investigation, G02 - Investigation, R01 - Remediation, T01 - Initial Final Release Comments: Detector Detector Download # Efficiency Model Serial Number -Station # LMI 43-68/S PR092525 130-3 0.155 LMI 43-106B PR128920 174-3 0.222 LMI 43-68B PR092525 179-3 0.218 LMI 43-94P100 PR119460 335-3 0.073 LMi 43-688 PR092525 373-3 0.203 LMI 43-68B PR119340 375-3 0.209 LMI 43-106B PR128919 376-3 0.208 LMI 43-106B PR128925 383-3 0.209 LMI 43-688 PR092525 389-3 0.218 LMI 43-106B PR128925 443-3 0.206 LM143-68B PR119340 521-3 0.204 LMI 43-68B PR092523 538-3 0.198 LMI 43-98/300 PR123601 704-3 0.020 LMI 43-98/300 PR123601 843-3 0.020 SEG SN-113-3C PR004832 845-3 0.076 SEG SP-113-3M PR096137 1912-3 0.082 LMI 43-98/300 PR117961 2040-3 0.017 O Page 12:TSABS:V2.16.1.a.10.7.96 Page 27
i Survey Detection Equipment Used Total Surface Activity - Beta Survey &g=m Location Code: D7501TZZZZEZ Survey Reasons: G01 - Investigation, G02 - Investigation, R01 - Remediation, T01 - Initial Final , Release 1 Medium Codes: B0002, B0018, B0019, B0023, B0037, B9999 ' I Download # - Survey User ID M2350 S/N Detector . Station Id S/N 130-3 LCF0451/95359 95359 PR092525 ' 174-3 LCF0451/126182 126182 PR128920 1 179-3 DTS6208/95359 95359 PR092525 l 335-3 DTS6208/117566 117566 PR119460 l 373-3 BJB1396/95359 95359 PR092525 375-3 L5FLDCT 117566 PR119340 376-3 VMB6153/126182 126182 PR128919 383-3 AOK2982/126175 126175 PR128925 389-3 BJB1396/95359 95359 PR092525 443-3 BJB1396/126175 126175 PR128925 521-3 AOK2982/117566 117566 PR119340 538-3 AOK2982/95361 95361 PR092523 704-3 AOK2982/126192 126192 PR123601 843-3 AOK2982/80498 80498 PR123601 845-3 PDG1526/126210 126210 PR004832 1912-3 DLB6373/80502 80502 PR096137 i 2040-3 DPS4133/80498 80498 PR117961 Program Version: V2.16.1.a.10.7.96 Report Printed At: 02:27:48 PM on 10/09/96 Total Pages: 13 Page 13:TSABS:V2.16.1.a.10.7.% Page 28 rsa_sys rat i
Statistical Summary Removable Surface Activity - Beta Survey g Location Code: D7501TZZZZEZ Survey Reasons: G01 - Investigation, R01 - Remediation, T01 - Initial Final Release Medium Codes: B0002, B0018, B0019, B0023, B0037, B9999 Net dpm/100 cm2 l Upper Confidence Limit (UCL) 2.6 l l Mean 1.6 l l Maximum 28.0 l l Minimum -6.9 l l Standard Deviation l Minimum Detectable Activity 6.0 l 26.1 l g l Critical Level 9.6 l l l Samples Reported 93l I l Samplcs Prescribed 93l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l l MDA < 187.5 dpm/100 cm2 YES l Pawed l Percent of Samples > 562.5 dpm/100 cm2 0.0 l Passed (5) l Number of Samples > 750.0 dpm/100 cm2 0 l Passed (6) I l l UCL of Mean less than or equal 750.0 dpm/100 cm2 YES l Passed 1 (5) 25% Test l (6) Single Measurement Test O l I Page 1:RSABS:V2.16.1.a.10.7.06 DRsNrst
~~/^\ Plant Systems Corrected Field Activity Values -~~
"V Removable Surface Activity - Beta Survey lEM55 gc=m. Location Code: D7501TZZZZEZ Comments: Activity (net) MDA, and CL reported dpm/10G cm2 > Underlined values exceed the critical level. Bold values exceed 562.5 dpm/100 crn2 Italic values exceed 750.0 dpm/100 cm2 Medium RC# Location ID - MDA Critical Activity Reason Code Location # Level Code B0002 26.32474 41-1 24.9 9.3 -6.9 T01 26.32475 41-2 24.9 9.3 0.0 26.32476 41-3 24.9 9.3 -2.3 26.32477 41-4 24.9 9.3 -2.3 26.32478 41-5 24.9 9.3 0.0 26.32479 41-6 24.9 9.3 -2.3 26.32528 43-1 22.2 8.0 1.9 26.32529 43-2 22.2 8.0 8.8 26.32530 43-3 22.2 8.0 -2.8 26.32531 43-4 22.2 8.0 -2.8 26.32532 43-5 22.2 8.0 -0.5 26.32533 43-6 22.2 8.0 6.5 B0018 26.22208 47-1 23.3 8.5 1.2 26.22209 47-2 23.3 8.5 1.2 26.26595 51-1 24.6 9.2 -2.1 26.26596 51-2 24.6 9.2 -6.7 26,26597 51-3 24.6 9.2 4.9 26.26598 51 4 24.6 9.2 2.5 26.26599 51-5 24.6 9.2 0.2 26.26600 51-6 24.6 9.2 9.5 26.26593 52-1 24.6 9.2 -2.1 26.26594 52-2 24.6 9.2 -4.4 26.26602 53-1 24.6 9.2 0.2 26.26603 53-2 24.6 9.2 4.4 26.26604 53-3 24.6 9.2 0.2 26.26605 54-1 24.6 9.2 7.2 26.26606 54-2 24.6 9.2 -2.1 . 26.26607 54-3 24.6 9.2 0.2 26.26585 55-1 24.6 9.2 -6.7 A 26.26586 55-2 24.6 9.2 -2.1 26.26587 55-3 24.6 9.2 0.2 26.26588 55-4 24.6 9.2 2.5 Page 2:RSABS:V2.16.1.a.10.7.96 Page 30
Plant Systems Corrected Field Activity Values Removable Surface Activity - Beta Survey EMi%
~~,y r a .,, y a-Louation Code: D7501TZZZZEZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level.~~
Bold values exceed 562.5 dpm/100 cm2 Italic values exceed 750.0 dptr./100 cm2 Medium RC# Location ID - MDA Critical Activity Reason Code Location # Level Code B0018 26.26589 55-5 24.6 9.2 0.2 T01 26.26590 55-6 24.6 9.2 4.9 26.26591 56-1 24.6 9.2 -4.4 26.26592 56-2 24.6 9.2 0.2 26.26582 57-1 24.6 9.2 0.2 26.26583 57-2 24.6 9.2 -4.4 26.26584 58-1 24.6 9.2 2.5 26.26608 59-1 24.6 9.2 -2.1 26.26609 59-2 24.6 9.2 2.5 26.26601 60-1 24.6 9.2 -4.4 26.26580 61-1 24.6 9.2 4.9 26.26581 61-2 24.6 9.2 2.5 26.26610 62-1 24.6 9.2 21.1 26.26611 62-2 24.6 9.2 28.0 26.26612 63-1 24.6 9.2 16.4 26.26613 64-1 24.6 9.2 4.9 23.26950 65-1 22.6 8.2 8.6 26.26951 65-2 22.6 8.2 3.9 26.26952 65-3 22.6 8.2 -0.7 26.26953 66-1 22.6 8.2 -0.7 26.26954 66-2 22.6 8.2 -0.7 26.26955 66-3 22.6 8.2 6.2 26.26956 67-1 22.6 8.2 -0.7 26.26957 67 2 22.6 8.2 -0.7 26.26958 68-1 22.6 8.2 -0.7 26.26959 69-1 22.6 8.2 1.6 26.26960 70-1 22.6 8.2 1.6 B0019 26.30650 42-1 22.9 8.3 -3.2 26.30651 42-2 22.9 8.3 -5.6 26.30652 42-3 22.9 8.3 -3.2 26.30653 42-4 22.9 8.3 -0.9 i Page 3:RSABS:V2.16.1.a.10.7.96 l Page 31
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~~Plant Systems Corrected Field Activity Values - Removable Surface Activity - Beta Survey g~~
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Location Code: D7501TZZZZEZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 562.5 dpm/100 cm2 Italic values exceed 750.0 dpm/100 cm2 Medium RC# Location ID - MDA Critical Activity Reason Code Location # Level Code 80023 26.21302 44-1 19.5 6.6 -1.2 T01 26.24870 50-1 23.3 8.5 -3.5 26.38685 72-1 21.9 7.8 4.4 G01 26.44157 74-1 24.0 8.8 3.0 26.97785 75-1 18.9 6.3 3.7 26.89597 76-1 26.1 9.6 0.8 B0037 26.22216 46-1 23.3 8.5 -3.5 T01 26.22217 46-2 23.3 8.5 17.4 0s 26.22218 26.22219 46-3 46-4 23.3 23.3 8.5 8.5
-3.5 5.8 26.22220 46-5 23.3 8.5 8.1 26.22221 46-6 23.3 8.5 5.8 26.22237 49-1 23.3 8.5 -1.2 26.22238 49-2 23.3 8.5 1.2 26.22239 49-3 23.3 6.5 -1.2 26.22240 49-4 23.3 8.5 5.8 26.22241 49 5 23.3 8.5 5.8 26.22242 49-6 23.3 8.5 3.5 3
B9999 26.26574 45-1 24.6 9.2 0.2 RO1 26.26575 45-2 24.6 9.2 14.1 26.26576 45-3 24.6 9.2 9s 26.26577 45-4 24.6 9.2 -6.7 26.26578 45-5 24.6 9.2 11.8 26.26579 45-6 24.6 9.2 -6.7 26.27816 48-1 23 6 8.7 1.4
>O 26.27817 48-2 23.6 8.7 1.4 26.27818 48-3 23.6 8.7 1.4 26.27819 48-4 23.6 8.7 -3.7 Page 4:RSABS:V2.16.1.a.10.7.%
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Plant Systems Corrected Field Activity Values - f$d@@ Removable Surface Activity - Beta Survey g_ =m . Location Code: D7501TZZZZEZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 . Underlined values exceed the critical level. Bold value.1 exceed 562.5 dpm/100 cm2 Italic values exceed 750.0 dpm/100 cm2 Medium RC# Location ID - MDA Critical Activity Reason Code Location # Level Code B9999 26.27820 48-5 23.6 8.7 3.2 RO1 26.27821 48-6 23.6 8.7 0.9 0 O Page 5:RSABS:V2.16.1.a.10.7.96 Page 33
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f
II l Graph of Activity versus Location Series (^ Removable Surface Activity - Beta Survey
-f8 M ,= m 1 Location Code: D7501TZZZZEZ !
l Survey Reasons: G01 - Investigation, R01 - Remediation, T01 - Initial Final Release 1 i l Medium Codes: B0002, B0018, B0019, B0023, B0037, B9999 i 4 Guideline Value 750.0 dpm/100 cm' 800
.mmmmmommmwmmmwmmwm wwwwwmww wm4evwve -- :::::
700 ---------------------------------------------- ----- ---- -- ------- l l 600- ---~--------------- --------------------- ------------ ------------ ( 500- ------------- -------- ------ -------- --------- ----- -------- --- i i 8 g 400-------------- ------- --------------- -------- ---- --- ------------ j E c6 tz 300- ------------------------------------------------ ------------------ E Z 200 - -- ------------------------------------- ----------- -------------- 4 100- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ------------------------------- i
._emano,mgwemum runnemmwame::----- - -- ::munneyR 0 4;;;;;;;;;a=;;a=64 =;";ynnumanunnem..,=*sas; massa;ne;;; mas =;;a;sm;s;;sa;S; sap;apa m=massesseaa -_gume ms -100 - H : ! ' 44444444% i ! ! ' ! ! ! ! ! ! ! ! ! ! ! ! A4r4444 ! ! ! ! ' ! ! ' ! ! ' ! ! ! ! ! ! ! ! ' ! ! ! ! ! ! ! ! ! ! ! ! ! ! 444um ' ! ! :
414141424243 434344454545464546474848 484E494941-51-91-52415154 S%855556-5746 594142434545464748-T4T4-TG1 4141414242434L4346-46454646-464748464&4MH9-6451414142-83-94 64 85854546-8749404142444546464749-72-751 Location Series
~~-- Critical Level --.- MDA Guideline Value -m- Activity n~~
Page 6:RSABS:V2.16.1.a.10.7.96 GRFSL7L8.FSL Page 34
Laboratory Equipment Used Removable Surface Activity - Beta Survey g g.=ya Location Code: D7501TZZZZEZ Survey Reasons: G01 - Investigation, R01 - Remediation, T01 - Initial Final Release Medium Codes: B0002, B0018, B0019, B0023, B0037, B9999 Location Range Survey User ID Laboratory Serial Equipment Number 41-1 to 41-6 AOK2982 LB-5100W SN5100W 43-1 to 43-6 AOK2982 LB-5100W SN5100W 51-1 to 51-6 AOK2982 LB-5100W SN5100W 521 to 52-2 55-1 to 55-6 AOK2982 AOK2982 LB-5100W LB-5100W SN5100W SN5100W g 56-1 to 56-2 AOK2982 LB-5100W SN5100W 57-1 to 57-2 AOK2982 LB-5100W SN5100W 58-1 AOK2982 LB-5100W SN5100W 60-1 AOK2982 LB-5100W SN5100W 61-1 to 61-2 AOK2982 LB-5100W SN5100W 72-1 AOK2982 LB-5100W SN5100W 74-1 AOK2982 LB-5100W SN5100W 75-1 AOK2982 LB-5100W SN5100W 42-1 to 42-4 BJB1396 LB-5100W SN5100W 44-1 BJB1396 LB-5100W SN5100W 45-1 to 45-6 BJB1396 LB-5100W SN5100W 76-1 DLB6373 LB-5100W UNIT 2 Program Version: V2.16.1.a.10.7.96 Report Printed At: 02:37:48 PM on 10/09/96 Page 7:RSABS:V2.16.1.a.10.7.96 _ YS.FS
l Laboratory Equipment Used Removable Surface Activity - Beta Survey icm--d Location Code: D7501TZZZZEZ , Survey Reasons: G01 - Investigation, ROI - Remediation, T01 - Initial Final Release Medium Codes: B0002, B0018, B0019, B0023, B0037, B9999 Location Range Survey User ID Laboratory Serial ' Equipment Number l 50-1 DTS6208 LB-5100W SN5100W 49-1 to 49-6 ELS8308 LB-5100W SN5100W 46-1 to 46-6 LCF0451 LB-5100W SN5100W 47-1 to 47-2 LCF0451 LB-5100W SN5100W Os 48-1 to 48-6 LCF0451 LB-5100W SN5100W 53-1 to 53-3 PDG1526 LB-5100W SN5100W 54-1 to 54-3 PDG1526 LB-5100W SN5100W 59-1 to 59-2 PDG1526 LB-5100W SN5100W 65-1 to 65-3 PDG1526 LB-5100W SN5100W 66-1 to 66-3 PDG1526 LB-5100W SN5100W 67-1 to 67-2 PDG1526 LB-5100W SN5100W 68-1 PDG1526 LB-5100W SN5100W 69-1 PDG1526 SN5100W LB-5100W 70-1 PDG1526 SN5100W LB-5100W 62-1 to 62-2 VMB6153 LB-5100W SN5100W 63-1 VMB6153 SN5100W LB-5100W 64-1 VMB6153 SN5100W LB-5100W Program Version: V2.16.1.a.10.7.96 Report Printed At: 02:37:59 PM on 10/09/96 Total Pages: _8 Page 8:RSABS:V2.16.1.a.10.7.96 kfSYS.FS
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Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Services -~~ gg
, Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record Contents Survey Area Survey Area ID: Survey Area Description Pages Turbine Vents & Drains, Control Room HVAC, g D7500 System 75 i
Survey Unit (s) l Location Code Survey Unit Description Pages 02 NZ Eml Turbine Building Ventilation 5-34 D7502 TZZZZ EZC01 0 i l Prepared By: N SEG Rad $ogi6Al Engineer Oe / /O fd Date i Reviewed By: ,O d h eO / so/u[96 SEG Prpje6t Radiation Protection Manager Date Approved By: hwy,.J A;x fx g,asr I /s/rc/rc PSCo Radiation Protection Manager Date O I Page1
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Scientific Ecology Group,Inc. Radiological Engineering & Decommissioning Services -~~ g Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record - Survey Area Survey Area ID: D7500 Survey Area
~~Description:~~
Turbine Vents & Drains, Control Room HVAC, System 75 Survey Area Packages: This Survey Area wa3 segregated and surveyed in accordance with the following survey packages: D7501 Turbine Vents & Drains, Control HVAC D7502 Turbine Building Ventilation D7503 QC Survey for Survey Package D7501 (Turbine Vents & Drains, Control Room HVAC) Package D7501 was used to survey Control Room and Service Building ventilation and the Turbine Building vents and drains. This survey unit was originally classified as unaffected, but, due to elevated activity found during final survey in the Control Room and Service Building ventilation filters that exceeded reclassification criteria, was reclassified as an affected plant system survey unit. This survey unit was randomly selected to have a QC Verification survey O performed which was accomplished with package D7503. Measurement locations are indicated ! v on the attached drawing and location table. Package D7502 was used to survey the Turbine Building ventilation system. This system was initially classified as an affected plant system due to elevated activity found in the ventilation system filters and heat exchangers during characterization surveys. Measurement locations are indicated on the attached drawing and location table. Survey Area Operational History: The Turbine Vents & Drains, Control Room HVAC System was in operation prior to plant , shutdown August 18,1989. Primary purposes were: 1) to convey the various vents, drains and I relief valve discharges from the turbine building equipment and piping to atmosphere, to waste, to the drain collector tank, or to the condenser as required; 2) to provide hot water for use in heating the building spaces in the reactor and turbine plants; and 3) to provide filtered, heated and/or cooled, humidified or dehumidified air to the control room, reactor engineer's office, auxiliary electrical equipment room, 480V switchgear room, and service building. Prior to commencement of characterization and final surveys, this nstem had no history of radioactive contamination. l O 1 l Page 2
Survey Area Decommissioning and Remediation Activities: For D7501, Control Room and Service Building HVAC air handling unit prefilters and sock O filters were replaced due to elevated activity found during final survey. The survey of locations 45 (Control Room ventilation filter), and 48 (Service Building ventilation filter), indicated elevated readings that range from about 1,700 dpm/100 cm 2 to 3,300 dpm/100 cm2 , which exceeded unaffected system reclassification criteria. The elevated readings were confined to the prefilter and sock filter elements where concentration of activity could occur over a long period of time. No elevated activity was found in the ventilation ducting or air handling unit or filter housings. D7501 was therefore reclassified as an affected plant system survey unit. More detailed information is found in Investigation #1 of this release record. For D7502, characterization surveys indicated elevated activity on ventilation filters and heat exchangers (which due to a buildup of dust / debris also acted as filters). Characterization survey 2 results indicated total surface activity as high as about 8,800 dpm/100 cm . While much of this activity was determined to be due to natural radioactivity (i.e., radon daughters), Co-60 and Cs-137 were also identified in gamma isotopic analysis performed on removed dust / debris and filter elements. Therefore, the filters were replaced and the heat exchangers (which could not be thoroughly cleaned and surveyed) were removed. As a result of the characterization activities this survey unit was surveyed as an affected plant system survey unit. Final characterization survey results are also included in the survey data for this survey unit. Isolation and Control Measures: level 2 Controls Access doors / covers were replaced upon completion of survey of ventilation components and O Level 2 Isolation and Control labels were placed adjacent to access points. For Turbine Building drains, Level 2 Isolation and Control labels were also placed at sump and drain tank openings. This system is in use and will remain in service during repowering. Survey Area
~~Conclusions:~~
For both packages D7501 and D7502, the results of total and removable surface activity measurements collected within this survey area meet the criteria for release for unrestricted use. The levels of removable H-3 and ll-3/Fe-55 detected were well below the administrative action level for removable Fe-55 and H-3 activity. The QC Verification survey performed with package D7503 supports the conclusion that survey unit D7501 is acceptable for release for unrestricted use. A survey data comparison graph of the Initial Final Survey and QC Verification measurements is prov'.ded in the telease record for D7503. O Page 3
l l 1 Survey Area
~~References:~~
' 1) Initial Radiological Site Characterization Report volumes 1, 2 and 13.

2) System Description (SD-75) Turbine Building Vent and Drain, Building Hot Water Heating, Control Room and Service Building HVAC 1 3) PI-75-1, 2, 3, 4, 5, 8, and 9, and PF-75-1, 2, 3, 4, 8, and 10 i

4) DI-067 ;

5) Discussion with PSCo and Westinghouse Team personnel i i I s
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Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record - Survey Unit Location Code: D7502 TZZZZ EZ Group ID Survey Area Number Surface Category Survey Unit Classification D 7500 System Internals EZ (Affected) Survey Reason: T01 - Initial Final Survey C01 - Characterization Survey Unit
~~Description:~~
Turbine Building Ventilation Survey Design: Measurement Type No. of Measurements Description > Beta Scan N/A Scan internal surfaces of each system component 9 including at least 25% of the accessible surfaces. No areas of significantly elevated activity were identified. Total Surface 129 Collected total surface activity measurements at Activity desigrated locations in 39 plant system components. py Smears 122 Collected removable surface activity measurements at designated locations in 39 plant system components. Special Samples 13 Removable 'H or 'H/"Fe smears were performed at selected plant system survey
~~;ocations. -w-4 9~~
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Survey Unit Investigations: O lavestigation #1 During the initial final survey of location 38, measurement 38-1 was taken on heat exchanger . E-7515 and read 5328 dpm/100cm2 . Measurements 38-2 and 38-3 were taken on the plenum 2 internals adjacent to E-7515 and read 996 dpm/100cm and -377 dpm/100cm2 respectively. Heat exchanger E-7515 was removed and disposed of as radioactive waste. Measurement 38-1 i was deleted from the active final survey database. Measurements 38-2 and 38-3 were accepted as final survey data. No further action was required. O l O Page 6 l
SCDWIC ECCLOCf tR0lF. NC. - f(Rf 9f. WM EECOMMI5510mG PRD.ECf FM SLD0f MY SYSTEM 79-115NE RLVNG HVK(E719CYD SiWLfEDIWMNG SDUTH 18 19 17 PLENUM f()E7507 l ()E7506()E75087 " l T/B L7 f 33 7515 DPERATING g i S7502 36 37 35 \~ FLDUR s g5 34 ( "I" 20 23 22 21 32 27 30 750339 - S7540ax 14 N/ N/ N/ N/ N/ N/ N/ jj 12 13 {7504 N.V. T/B UPPER AUX. N/ N/ N/ M.S. M.S. BDILER T/B 480V LP FEED ()E7505 6 STDP MEZZ 150 L7 CST AREA T/B L6 AREA AREA RDUM L6 SVITCH HTR gg
/s /g /\ /N /N NORTH GEAR AREA gf 16 AREA /s STANDBY RAILROAD 4 4 DIESEL T/B T/B LUBE DIL ENTRANCE MACHINE T/B LUBE DIL STORAGE AREA SHDP L5 RES. RDOM TANK ROOM SV RETURN 4 T/B L5 SOUTH PUMP AREA )
2 16 5 l31 3 C7518 ( CONTROL F7507 AUXILIARY SVITCH GEAR - C7514 RDOM RDDM f DUTSIDE ELECTRICAL 24 _ EQUIP RDOM AIR 26
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Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Services g
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O G Fort St. Vrain Nuclear Generating Station Decommissioning Project Survey Location Summary L a on Descript!on Location Number CI d 2 6 - TSA Ventilation return duct in Turbine Bldg. Level 5 South-6 - RSA overhead of C0005 C0005 3 6 - TSA Ventilation return duct in Turbine Bldg. Izvel 5 North 6 - RSA overhead of C0007 G/A-C0007 4 2 - TSA Ventilation return duct on west Turbine Lube Oil Room TB-2 - RSA wall of Turbine Lube Oil Room L5-N - C0008 5 2 - TSA Ventilation return duct on east Weld Shop TB-LS-W - C0003 2-RSA wall of Weld Shop Upper level 6 4 - TSA Ventilation return duct in Turbine Bldg. level 5 SE 4-RSA overhead of C0001 corner of railroad bay - C0001 7 1 - TSA Inspection Cover downstream of TB-L5-NE l 1-RSA C-7539 8 2 - TSA Supply into Turbine Building Turbine Bldg. Level 5 Nonh 2 - RSA downstream of C-7539 East Inspection cover on duct to Turbine Bldg. Izvel 5 North ! 1 - TSA atmosphere downstream of C- East 1 - RS A 7539 10 2 - TSA Return duct from 480V TB-L5-NE-480V Room, South 2 - RS A Switchgear Room Wall 11 2 - TSA Supply duct to Level 6 - North TB-L6-North, South of 2 - RSA General Area Elevator in overhead 12 2 - TSA Supply Duct to level 6 - East TB-L^ - North East, West of 2 - RSA Mezzanine S-3305 (Blue Tk) 13 2 - TSA Supply duct to Boiler Feed TB-L6-East, North of 2 - RSA Pumps Hoistwell 14 8 - TSA Intake South Plenum Room TB-L6 South East 8-RSA 1 'H 15 4 - TSA Intake North Plenum Room TB-L6-South East 4 - RSA Page 8
I I L a on Deserl), tion Loca lon Number C1 d 16 2 - TSA Supply Duct to South General TB-L6-South, Column A,5 2-RSA Area level 6 17 3 - TSA Inspection cover on supply duct TB-L6 South. On cross over 3 - RS A to Aux. Boiler. Upstream of E- stairs. Bottom duct. 1 'll/"Fe 7508 18 3 - TS A Inspection cover on supply duct TB-L6 South. On cross over 3 - RS A to Turbine Bldg. level 6 West stairs. Middle Duct. 1 'll areas. Upstream of E-7507 19 3 - TS A Inspection cover on supply duct TB-L6 South. On cross over 3 - RS A to Turbine Deck West. stairs. Top Duct. 1 'll Upstream of E-7506. 20 2 - TSA Supply duct to Turbine Bldg. TB-L6-South West by 2 - RSA level 6 South West hoistwell 21 2 - TSA Return duct from Decay IIcat TB-lhNorth West 2 - RS A Removal lix area 22 2 - TSA Return Duct -Turbine Bldg, TB-L6 North West 2 - RS A level 6 NW 23 2 - TSA Supply duct to MS Stop Area TB-L6 West 2 - RSA 24 Inspecti n door downstream of Bahnson Bldg. North West 2 - TSA C-7535 Compartment containing 2 - RSA DV75336 25 12 - TS A F-7507 Compartment Bahnson Bldg. South East 8-RSA corner, upper level. 1 'll/"Fe 26 12 - TSA F-7508 Compartment Bahnson Bldg. South East 8-RSA corner, upper level, 1 'll/"Fe 27 2 - TS A Supply Duct to upper TB-L7- South West 2 - RSA Condensate Storage Tank Area 28 Return duct from Turbine Lube TB-L5-North, Turbine Lube 2 - TSA Oil Storage Tank Room Oil Storage Tank Room, South 2 - RS A wall 29 2 - TSA Supply duct to Diesel Generator TB-L5-South 2-RSA Room (K9206X) O Page 9
4
*** " Location st Description ~
~~g Number 30 2 - TSA Supply duct to Auxiliary Boiler TB-L5-South West, East wall 2 - RSA Room Auxiliary Boiler Room~~
; 31 2 - TSA Supply duct to Service Water TB-L5-West 2 - RSA Return Pumps j 32 2 - TSA Supply duct West Turbine Deck TB-L7-West, Second duct 2 - RSA from the north 33 2 - TSA Supply duct East Turbine Deck TB-L7-East, South duct 2 - RSA 34 9 - TSA North Section of South Plenum TB-L6 South East t l 9 - RSA Room
~~- 1 'H/"Fe~~
~~35 3 - TSA Supply duct to Aux. Boiler TB-14 South. On cross over 1 3 - RSA downstream of E-7508 stairs. Bottom Duct.~~
j 1 'H < 36 3 - TSA Supply duct to 'Ibrbine Bldg. TB-14 South. On cross over 3 - RSA 12 vel 6 West areas downstream stairs. Middle duct i ! 'H of E-7507. !- 37 3 - TSA Supply duct to Turbine Bldg. TB-L6 South. On cross over
~~3-RSA Izvel 6 West downstream of E- stairs. Top duct 1 'H 7506.~~
l 38 2 - TSA Supply duct to Turbine Bldg. TB-L6 South East. Top, Est 3-RSA 12 vel 7, upstream of E-7515. side of Vent Supply Unit 1 'H 39 3 - TSA Supply duct to Turbine Bldg. TB-L6 South East. West side , 3 - RSA Izvel 7, upstream of E-7503. of Vent Supply Duct 1 'H 40 3 - TSA Supply duct to Turbine Bldg. TB-L6 South East. East Side
~~3 - RSA Izvel 6 areas upstream of E- of Vent Supply Unit.~~
i 1 'H/"Fe 7504. i Note: location Number 1 not used 4 Page 10
Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Services g
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~~Fort St. Vrain Nuclear Generating Station Decommissioning Project Special Samples Location Code: D7502 TZZZZ EZ Comments:~~
'H/"Fe activity reported in Net dpm/100 cm2 Underlined values exceed the critical level Bold 'H/"Fe values exceed 30,000 dpm/100 cm2 Italic 'H/"Fe values exceed 40,000 dpm/100 cm2 Removable Tritium or Tritium / Iron-55 Activity Samples Location # Type of Sample Critical Level MDA Activity 14-1 'H I15.0 235.9 36.0 17-1 'H/"Fe 11.9 26.6 21.4 18-1 'H 115.0 235.9 116.4 19-1 'H I15.0 235.9 17.0 25-1 'H/"Fe 7.1 15.7 5.6 26-1 'H/"Fe 9.6 21.5 8.6 34-1 'H/"Fe 10.7 24.0 7.0 ,
35-1 'H 115.0 235.9 7.8 36-1 'H I15.0 235.9 52.3 37-1 'H ' 115.0 235.9 -37.3 38-1 'H I15.0 235.9 -74.5 i i 39-1 'H 115.0 235.9 -1.3 ' 40-1 'H/"Fe 13.7 31.0 54.0 0 Page 11
Compilation of Statistical Summaries _ (./ Total Surface Activity - Beta Survey jd@@ Removable Surface Activity - Beta Survey Location Code: D7502TZZZZEZ Medium Code: B0018 i Comments: Total Surface Activity (TSA) reported in Net dpm/100 cm2 Removable Surface Activity (RSA) reported in Net dpm/100 cm2 TSA RSA Upper Confidence Limit (UCL) 477.9 5.5 Mean 412.8 4.3 Maximum 2,334.3 40.3 Minimum -386.5 -7.9 Standard Deviation 449.5 8.1 Minimum Detectable Activity 846.1 26.1 Critical Level 402.1 9.9 Samples Reported 129 122 l Samples Prescribed 129 122 l Page 1: ERGS:V2.17.1.a.10.10.% Page 12
1 Statistical Summary Total Surface Activity - Beta Survey gg g== , Location Code: D7502TZZZZEZ Survey Reasons: C01 - Characterization, T01 - Initial Final Release Medium Code: B0018 Net dpm/100 cm2 l Upper Confidence Limit (UCL) 477.9 l l Mean 412.8 l l Maximum 2,334.3 l l Minimum -386.5 l l Standard Deviation 449.5 l l Minimum Detectable Activity 846.1 l l Critical Level 402.1 l l Samples Reported 129l l Sampies Prescribed 129l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 3,000.0 dpm/100 cm2 YES l Passed l Percent of Samples > 3,000.0 dpm/100 cm2 0.0 l Passed (3) l Number of Samples > 4,000.0 dpm/100 cm2 0 l Passed (4) l UCL of Mean less than or equal 4,000.0 dpm/100 cm2 YES l Passed (3) 10% Test (4) Single Measurement Test l Page 1:TSABS:V2.17.1.a.10.10.96 Pasqsl3 rst
/* Plant Systems Corrected Field Activity Values - d Total Surface Activity - Beta Survey ,b,.=$ f$$)$ Location Code: D7502TZZZZEZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 3,000.0 dpm/100 cm2 Italic values exceed 4,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # . Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0018 841-1 2-1 15 838.7 398.1 15.7 C01 2-2 648.8 303.1 580.4 2-3 635.4 296.5 -47.1 2-4 593.5 275.5 298.0 2-5 644.4 300.9 -31.4 2-6 670.3 313.9 -125.5 844-1 3-1 542.8 250.5 430.8 850-1 3-2 706.8 332.8 -15.2 3-3 535.0 247.0 333.6 3-4 554.8 256.9 409.5 3-5 530.0 244.4 697.6 (] 3-6 652.2 305.5 637.0 () 842-1 4-1 4-2 681.9 785.6 320.1 371.9 461.5
-123.1 5-1 705.5 331.9 246.2 l 5-2 739.4 348.8 184.6 846-1 6-1 638.1 298.0 -77.7 6-2 704.5 331.2 543.7 6-3 642.5 300.2 -62.1 6-4 624.8 291.4 170.9 858-1 7-1 684.6 321.8 166.0 8-1 669.1 314.1 709.4 8-2 653.2 306.1 105.7 9-1 641.0 300.0 135.8 10-1 645.1 302.1 558.5 10-2 645.1 302.1 437.7 846-1 11-1 563.3 260.6 466A '
11-2 548.0 253.0 403.9 832-1 12-1 717.5 337.1 128.0 12-2 709.2 332.9 00 13-1 749.6 353.1 -16.0 13-2 725.7 341.1 48.0 354-3 14-1 846.1 402.1 896.6 T01 14-2 630.6 294.4 680.2 14-3 806.5 382.3 1.360.4 n 14-4 735.5 346.8 850.2 / 14-5 716.6 337.4 726.6 (_)\ 14-6 716.6 337.4 448.3 14-7 829.8 394.0 772.9 14-8 819.9 389.0 510.1 Page 2:TSABS:V2.17.1.a.10.10.96 Page 14
~~... noo. . ..~~
Plant Systems Corrected Field Activity Values - Total Surface Activity - Beta Survey g.=Mm,M Location Code: D7502TZZZZEZ Comments: Activity (net), MDA, and CL reponed dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 3,000.0 dpm/100 cm2 Italic values exceed 4,000.0 dpm/100 cm2 Count time reponed in second Medium Download # . Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0018 842-1 15-1 15 838.8 398.5 630.8 C01 15-2 681.9 320.1 1.353.8 15-3 795.8 377.1 __430.8 15-4 782.1 370.2 769.2 846-1 16-1 624.8 291.4 248.5 16-2 642.5 300.2 201.9 479-3 17-1 633.2 295.9 76.6 T01 17-2 694.4 326.5 76.6 17-3 620.2 289.4 260.3 18-1 702.1 330.3 -183.7 18-2 706.0 332.2 153.1 18-3 593.3 275.9 842.1 19-1 674.7 316.6 719.6 19-2 674.7 316.6 1.224.9 19-3 717.3 337.9 275.6 832-1 20-1 705.0 330.8 368.0 C01 20-2 787.8 372.2 -144.0 842-1 21-1 582.1 270.2 -30.8 21 2 582.1 270.2 107.7 846-1 22-1 615.8 286.8 466.0 22-2 624.8 291.4 155.3 832-1 23-1 692.3 324.5 256.0 23-2 757.4 357.0 80.0 858-1 24-1 736.2 347.6 317.0 24-2 714.5 336.8 -166.0 25-1 729.0 344.1 45.3 25-2 780.8 370.0 -211.3 25-3 757.1 358.1 135.8 25-4 703.5 331.3 -135.8 357-3 25-5 697.3 328.5 -14.9 T01 25-6 667.4 313.5 -14.9 25-7 711.7 335.7 0.0 25-8 667.4 313.5 0.0 25-9 590.0 274.8 401.9 25 10 651.9 305.8 520.9 25 11 704.6 332.1 44.7 25-12 585.6 272.6 640.0 858-1 26-1 7604 359.8 830.2 C01 26-2 813.4 386.3 694.3 26-3 746.7 352.9 1.373.6 Page 3:TSABS:V2.17.1.a.10.10.96 Page 15
I l O Plant Systems Corrected Field Activity Values k" l =d@@ E Total Surface Activity - Beta Survey ==._ n Location Code: D7502TZZZZEZ Comments: Activity (net) MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 3,000.0 dpm/100 cm2 Italic values exceed 4,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # . Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0018 858-1 26-4 15 669.1 314.1 60.4 C01 357-3 26-5 779.7 369.7 907.9 T01 26-6 839.0 399.3 1.116.3 26-7 805.2 382.4 788.8 26-8 773.2 366.4 1.339.5 l 26-9 602.9 281.3 788.8 l 26-10 686.3 323.0 401.9 i 26-11 659.7 309.7 774.0 l 26-12 655.8 307.8 _ 580.5 832-1 27-1 620.0 288.3 -48.0 C01 27-2 643.5 300.1 336.0
/ 842-1 28-1 665.7 312.0 400.0 C]/ 846-1 28-2 20-1 627.0 704.5 293.0 331.2 707.7 -77.7 29-2 692.6 325.2 186.4 30-1 655.4 306.6 512.6 30-2 651.1 304.5 683.5 842-1 31-1 632.0 295.1 123.1 31-2 732.0 345.2 -369.2 ,
832-1 32-1 705.0 330.8 480.0 l l 32-2 729.7 343.2 304.0 33-1 717.5 337.1 192.0 33-2 713.4 335.0 64.0 l 354-3 34-1 761.2 359.6 742.0 T01 1 34-2 796.3 377.2 340.1 34-3 771.9 365.0 1.035.7 34 4 775.4 366.8 788.4 34-5 771.9 365.0 602.9 34-6 626.2 292.2 139.1 34-7 589.7 273.9 ._.432.9 34-8 608.2 283.2 61.8 34-9 643.7 300.9 30.9 479-3 35-1 633.2 295.9 382.8 35-2 628.9 293.7 581.8 35-3 709.8 334.1 490.0 36-1 593.3 275.9 1.010.5 O 36-2 739.5 349.0 199.0 k.sl 36 3 654.3 306.4 689.0 37 1 637.5 298.0 888.0 37-2 650.2 304.3 1.010.5 Page 4:TSABS:V2.17.1.a.10.10.96 Page 16
Plant Systems Corrected Field Activity Values j Total Surface Activity - Beta Survey lE _;,_
~~,+.=~~
d@S Location Code: D7502TZZZZEZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 3,000.0 dpm/100 cm2 Italic values exceed 4,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0018 479-3 37-3 15 674.7 316.6 1.163.8 T01 354-3 38-2 626.2 292.2 1.020.3 38-3 753.9 356.0 -386.5 39-1 626.2 292.2 2.334.3 39-2 738.3 363.2 -61.8 39-3 652.2 305.2 2.071.5 40-1 668.9 313.5 417.4 40-2 689.2 323.7 108.2 40-3 689.2 323.7 309.2 O G Page 5:TSABS:V2.17.1.a.10.10.96 Page 17
~~/' Graph of Activity versus Location Series 'r~s=~~
t Total Surface Activity - Beta Survey g]@@ Location Code: D7502TZZZZEZ Survey Reasons: C01 - Characterization, T01 - Initia! Final Release ; i Medium Code: B0018 Average Guideline Value 1 4000.0 dpm/100 cm' 4000 =- ==- : += =- = + *-= - : +v- v-v-~- v " = " = - =++ 3 500 - -- - - - - - - - - - - - - - - - - - - - - - ------------------------ ----------- ------ 300 T~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 2500- ---------- --------------- ----------------------------- ----- --- O 2000- -------- -- -------------------------- -------------- ------------- 8 p 1500----- ------- ---------------- --------- ---------- --------------- cu
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~~it.157 3 $8-2 2-2 24 24 3-2 34 34 4-2 52 62 64 61 91 152 11-2 12-2 13-2 142 144 144 144 152 104 152 172 181 153 Location Series l Critical level --*--- M DA~~
~~-+- Average Guideline Value -.- Activity~~
O Page 6:TSABS:V2.17.1.a.10.10.96 Page 18 GRFSL7L8.FSL
Graph of Activity versus Location Series [== Total Surface Activity - Beta Survey pg[$$$$[ i
~~=g.~~
Location Code: D7502TZZZZEZ Survey Reasons: C01 - Characterization, T01 - Initial Final Release Medium Code: B0018 Average Guideline Value 4000.0 dpm/100 cm' 4000-*-*+++*-*+v-+-+-*++----"-*++-*+++*++~+v-*+++~+++-*+v-*++++++ 3500----------- - ----------------- --------- --- ----------- ---------- 3000---- - ---- --------------- - ------------------------------------ 2500- - - - - - - - - - - - - - - - ----------------------- ---------------------- --- 4 c. , b2000- ---- - --- ------- ----------- ------ - ---------- - - --------- l 8 l 1500 - ----- ----- - --- ---------- ----------- ----------- -- ------- l
'1 y 1000---- -------- ------------------------p---------------------- l Be av , A Em - - - -x"\ - $n 'g . g m m . a-g" ****
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-~y- - - \ - v\ , ,, n " " .-n- --- ,---------------- - J._,-p--.e.._,/_ m ,-. ,i . w . . . ~ . . ,1" s , ~ \/ -
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-500- - - --- - --- - -- -- --- - ------- - -- ------- --- - - -1000-4 i ' ! 4-l l l ; i ! ! !l't L4 i i ! ! 4-4-t-4-44-f4 ! ! ! !-4-! ! i H-4 l l !--H ' ' '
153 192 241 21-1 22-1 231 241 25 25$ 2kd 2h125-0 241126-4 26-3 264 26126 0 241i 27-125-1291344 31132d 3hI 191 19-3 2D2112 22-2 23-2 244 242 254 254 254 25107512 242 26-4 264 246 26-1026-12 27 2 28-2 29 2 3D-2 31-2 32-2 33-2 Location Series
-- Critical Level -*-- MDA -*- Average Guideline Value --. Activity Page 7:TSABS:V2.17.1.a.10.10.96 Page 19 GRFSL7L8.FSL
~~O Graph of Activity versus Location Series Total Surface Activity - Beta Survey~~
~~-IS$$$~~
g.=.y.a Location Code: D7502TZZZZEZ Survey Reasons: C01 - Characterization, T01 - Initial Final Release Medium Code: B0018 l I Average Guideline Value 4000.0 dpm/100 cm* 4000 : - 1 3500---------------------------- - ----------- -.-------- -------------- 3000- ------------------------------ --- ------------------------------ 2500- ------------------------------------------- ------------- --------- U ~, 2000-- - - - - - - - - - - - -------------- ------- -------------- - J------------ v
]
8 l 1500- ---------------------------------- ----------------- --- --------- : g 1000- ---- * ------------------------ -------- .(- hs--- 2'. ..-.-n:---. s N
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.. = ; -500- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -1000 ; j l l l , ! l l l
l ! l ! ; ! l l l 34-2 34-4 34 4 34 4 351 35-3 36-2 37 1 37-3 38-3 39-2 40'1 40-3 Location Series
-- - Critical level *- MDA -~ Average Guideline Value -.- Activity ,
i Page 8:TSABS:V2.17.1.a.10.10.96 Page 20 GRFSL7L8 FSL t
Background Correction Values - Total Surface Activity - Beta Survey fS g=MS m Location Code: D7502TZZZZEZ Comments: Field Background (Bkg) reported in cpm / detector area. Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0018 841-1 2-1 02200 15 TM001 476.0 0.0 C01 2-2 276.0 2-3 264.0 2-4 228.0 2-5 272.0 2-6 296.0 844-1 3-1 196.0 850-1 3-2 356.0 3-3 196.0 3-4 212.0 3-5 192.0 3-6 300.0 842-1 4-1 320.0 4-2 432.0 5-1 344.0 5-2 380.0 846-1 6-1 272.0 6-2 336.0 6-3 276.0 6-4 260.0 858-1 7-1 TS001 336.0 8-1 TM001 320.0 8-2 304.0 9-1 TS001 292.0 10-1 TM001 296.0 10-2 296.0 846-1 11-1 208.0 11-2 196.0 832-1 12-1 32b.0 12-2 320.0 13-1 360.0 13-2 336.0 354-3 14-1 500.0 T01 14-2 268.0 14-3 452.0 14-4 372.0 14-5 352.0 14-6 352.0 14-7 480.0 14-8 468.0 Page 9:TSABS:V2.17.1.a.10.10.96 Page 21
Background Correction Values Total Surface Activity - Beta Survey g=g . 12xation Code: D7502TZZZZEZ Comments: Field Background (Bkg) reported in epm / detector area. - Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0018 842-1 15-1 02200 15 TM001 496.0 0.0 C01 15-2 320.0 > 15-3 444.0 15-4 428.0 846-1 16-1 260.0 16-2 276.0 479-3 17-1 276.0 T01 l 17-2 336.0 17-3 264.0 18-1 344.0 18-2 348.0 p 18-3 240.0 ('/ 19-1 316.0 19-2 316.0 19-3 360.0 832-1 20-1 316.0 C01 20-2 400.0 842-1 21-1 228.0 21-2 228.0 846-1 22-1 252.0 22-2 260.0 832-1 23-1 304.0 23-2 368.0 858-1 24-1 392.0 24-2 368.0 25-1 384.0 25-2 444.0 25-3 416.0 25-4 356.0 357-3 25-5 360.0 T01 25-6 328.0 25-7 376.0 25-8 328.0 25-9 252.0 25-10 312.0 25-11 368.0 (O
'q_,/ 858-1 25-12 26-1 248.0 420.0 C01 26-2 484.0 26-3 404.0 Page 10:TSABS:V2.17.1.a.10.10.% I Page 22 l
~~Background Correction Values ~== Total Surface Activity - Beta Survey MMS @~~
~~,+7a m Location Code: D7502TZZZZEZ Comments: Field Background (Bkg) reported in epm / detector area.~~
Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0018 858-1 26-4 02200 15 TM001 320.0 0.0 C01 357-3 26-5 456.0 T01 26-6 532.0 26-7 488.0 26-8 448.0 26-9 264.0 26-10 348.0 26-11 320.0 26-12 316.0 832-1 27-1 240.0 C01 27-2 260.0 842-1 28-1 304.0 28-2 268.0 846-1 29-1 336.0 29-2 324.0 30-1 288.0 30-2 284.0 842 1 31-1 272.0 31-2 372.0 832-1 32-1 316.0 32-2 340.0 33-1 328.0 33-2 324.0 354-3 34-1 400.0 T01 34-2 440.0 34-3 412.0 34-4 416.0 34-5 412.0 34-6 264.0 34-7 232.0 34-8 248.0 34-9 280.0 479-3 35-1 276.0 35-2 272.0 35-3 352.0 36-1 240.0 36-2 384.0 36-3 296.0 37-1 280.0 37-2 292.0 Page 11:TSABS:V2.17.1.a.10.10.96 Page 23
i i Background Correction Values Total Surface Activity - Beta Survey g
~~,yrm-y, Location Code: D7502TZZZZEZ Comments: Field Background (Bkg) reported in cpm / detector area.~~
Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0018 479-3 37-3 02200 15 TM001 316.0 0.0 T01 354-3 38-2 264.0 38-3 392.0 39-1 264.0 39-2 408.0 39-3 288.0 40-1 304.0 40-2 324.0 40-3 324.0 i O Page 12:TSABS:V2.17.1.a.10.10.96 Page 24
Summary of Efficiency Values Total Surface Activity - Beta Survey
~~-f$$$$~~
g=,ya Location Code: D7502TZZZZEZ Survey Reasons: C01 - Characterization, T01 - Initial Final Release Comments: Detector Detector Download # Efficiency Model Serial Number -Station # LMI 43-68B PR119340 354-3 0.207 LMI 43-68B PR119340 357-3 0.215 LMI 43-68B PR119340 479-3 0.209 LMI 43-68B PR095080 832-1 0.200 LMI 43-68B PR119445 841-1 0.204 LMI 43-68B PR095080 842-1 0.208 LMI 43-688 PR119445 844-1 0.208 LMI 43-68B PR095080 846-1 0.206 LMI 43-68B PR119445 850-1 0.211 LMI 43-68B PR095080 , 858-1 0.212 9: l Page 13:TSABS:V2.17.1.a.10.10.96 l Page 25 ; I l
t Survey Detection Equipment Used V) Total Surface Activity - Beta Survey
~~-Ed@$~~
r..= y_. , Location Code: D7502TZZZZEZ Survey Reasons: C01 - Characterization, T01 - Initial Final Release , Medium Code: B0018 i Download # - Survey User ID M2350 S/N Detector ; Station Id S/N ' 354-3 AOK2982/117566 117566 PR119340 357-3 AOK2982/117566 117566 PR119340 479-3 AOK2982/117566 117566 PR119340
~~. 832-1 RLN4080/98642 98642 PR095080~~
,k 841-1 LCF0451/117578 117578 PR119445 842-1 RLN4080/98642 98642 PR095080 844-1 LCF0451/117578 117578 PR119445 846-1 RLN4080/98642 98642 PR095080 850-1 LCF0451/117578 117578 PR119445 i 858-1 RLN4080/98642 98642 PR095080 j Program Version: V2.17.1.a.10.10.96
~~, Report Printed At: 08:09:43 AM on 10/11/96 Total Pages: 14 Page 14:TSABS:V2.17.1.a.10.10.96 Page 26 FSR.SYS FSL~~
Statistical Summary Removable Surface Activity - Beta Survey gg g.c a m , Location Code: D7502TZZZZEZ Survey Reasons: C01 - Characterization, T01 - Initial Final Release Medium Code: B0018 Net dpm/100 cin2 l Upper Confidence Limit (UCL) 5.5 l l Mean 4.3 l l Maximum 40.3 l l Minimum -7.9 l l Standrid Iseviation 8.1l l Minimum Detectable Activity 26.1 l l Critical Level 9.9 l l Samples Reported 122 l l Samples Prescribed 122l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 187.5 dpm/100 cm2 YES l Passed l Percent of Samples > 562.5 dpm/100 cm2 0.0 l Passed (3) l Number of Samples > 750.0 dpm/100 cm2 0 l Passed (4) l UCL of Mean less than or equal 750.0 dpm/100 cm2 YES l Passed (3) 10% Test (4) Single Measurement Test O Page 1:RSABS:V2.17.1.a.10.10.96 Page 27 FSR_ STAT FSL
O Plant Systems Corrected Field Activity Values -- u Removable Surface Activity - Beta Survey IBMLE g,: =m. Location Code: D7502TZZZZEZ ! Comments: Activity (ne0. MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 562.5 dpm/100 cm2 Italic values exceed 750.0 dpm/100 cm2 Medium RC # Location ID - MDA Critical Activity Reason Code Location # Level Code B0018 26.10503 2-1 23.6 8.7 10.2 C01 26.10504 2-2 23.6 8.7 0.9 26.10505 2-3 23.6 8.7 -1.4 26.10506 2-4 23.6 8.7 -6.0 26.10507 2-5 23 6 8.7 _ 10.2 26.10508 2-6 23.6 8.7 19.4 26.10560 3-1 22.9 8.3 -0.9 26.10652 3-2 24.0 8.8 -3.9 26.10653 3-3 24.0 8.8 0.7 26.10654 3-4 24.0 8.8 . 9.9 26.10655 3-5 24.0 8.8 7.6 26.10656 3-6 24.0 8.8 3.0 O. 26.10513 26.10514 4-1 4-2 23.6 23.6 8.7 8.7 14.8 0.9 26.10515 5-1 23.6 8.7 0.9 26.10516 5-2 23.6 8.7 0.9 26.10546 6-1 22.9 8.3 8.3 26.10547 6-2 22.9 8.3 8.3 ) 26.10548 6-3 22.9 8.3 3.7 l 26.10549 6-4 22.9 8.3 8.3 26.10660 71 25.5 9.6 13.4 26.10657 8-1 25.5 9.6 1.9 26.10658 8-2 25.5 9.6 .. 36.6 1 26.10659 91 25.5 9.6 -0.5 26.10661 10 1 25.5 9.6 4.2 26.10662 102 25.5 9.6 25.0 26.10558 11 1 22.9 8.3 17.6 26.10559 11-2 22.3 8.3 3.7 26.10352 12-1 22.6 B.2 1.6 26.10353 12-2 22.6 8.2 -3.0 26.10354 13-1 22.6 8.2 3.9 26.10355 13-2 22.6 8.2 3.9 26.26020 14-1 26.1 9.9 13.0 T01 26.26021 14-2 26.1 9.9 8.3 26.26022 14-3 26.1 9.9 19.9 26.26023 14-4 26.1 9.9 . 10.6
,O j 26.26024 14-5 26.1 9.9 6.0 V 26.26025 14-6 26.1 9.9 9.9 3.7 26.26026 14-7 26.1 1.4 26.26027 14-8 26.1 9.9 1.4 Page 2:RSABS:V2.17.1.a.10.10.96 Page 28
1 I I 1 Plant Systems Corrected Field Activity Values Removable Surface Activity - Beta Survey [(5d55 i g.=,s n 1 Location Code: D7502TZZZZEZ ! l Comments: Activity (net), MDA, and CL reponed dpm/100 cm2 Underlined values exceed the critical level. 4 Bold values exceed 562.5 dpm/100 cm2 Italic values exceed 750.0 dpm/100 cm2 ! l Medium RC # Location ID - MDA Critical Activity Reason Code Location # Lesel Code B0018 26.10410 15-1 21.5 7.6 4.f C01 26.10411 15-2 21.5 7.6 0.b 26.10412 15-3 21.5 7.6 4.6 26.10413 15-4 21.5 7.6 -2.3 26.10556 16-1 22.9 8.3 -0.9 26.10557 16-2 22.9 8.3 3.7 26.36825 17-1 24.9 9.3 0.0 T01 26.31826 17-2 24.9 9.3 2.3 26.31827 17-3 24.9 9.3 -2.3 26.31828 18-1 24.9 9.3 -2.3 26.31829 18-2 24.9 9.3 -4.6 26.31830 18-3 24.9 9.3 2.3 26.31831 19-1 24.9 9.3 6.9 26.31832 19-2 24.9 9.3 . 20.8 26.31833 19-3 24.9 9.3 2.3 26.10362 20-1 22.6 8.2 1.6 C01 26.10363 20-2 22.6 8.2 1.6 26.10408 21-1 21.5 7.6 _E 26.10409 21-2 21.5 7.6 2.3 26.10550 22-1 22.9 8.3 3.7 26.10551 22-2 22.9 8.3 . . 22.2 26.10364 23-1 22.6 8.2 -0.7 26.10365 23-2 22.6 8.2 8.6 26.10903 24-1 22.6 8.2 6.2 26.10904 24-2 22.6 8.2 -0.7 26.25992 25-1 26.1 9.9 3.7 T01 26.25993 25-2 26.1 9.9 -5.6 26 25994 25-3 26.1 9.9 -5.6 26.25995 25 4 26.1 9.9 -0.9 26.25996 25-5 26.1 9.9 -0.9 26.25997 ?S-6 26.1 9.9 3.7 26.25998 25-7 26.1 9.9 1.4 26.25999 25-8 26.1 9.9 -0.9 26.2tiOOO 26-1 26.1 9.9 -3.2 26.26001 26-2 26.1 9.9 -0.9 26.26002 26-3 26.1 9.9 -0.9 26.26003 26-4 26.1 9.9 -3.2 26.26004 26-5 26.1 9.9 3.2 l 26.26005 26-6 26.1 9.9 -0.9 26.26006 26-7 26.1 9.9 1.4 i Page 3:RSABS:V2.17.1.a.10.10.96 Page 29 s
Plant Systems Corrected Field Activity Values Removable Surface Activity - Beta Survey a .=gs g. Location Code: D7502TZZZZEZ Comments: Activity (net). MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 562.5 dpm/100 cm2 Italic values exceed 750.0 dpm/100 cm2 Medium RC # Location ID - MDA Critical Activity Reason l Code Location # Level Code B0018 26.26007 26-8 26.1 9.9 6.0 T01 26.10366 27-1 22.6 8.2 8.6 C01 26.10367 27-2 22.6 8.2 3.9 26.10511 28-1 23.6 8.7 40.3 26.10512 28-2 23.6 8.7 14.8 26.10554 29-1 22.9 8.3 3.7 26.10555 29-2 22.9 8.3 -0.9 26.10552 30-1 22.9 8.3 15.3 26.10553 30-2 22.9 8.3 6.0 26.10509 31 1 23.6 8.7 -1.4 26.10510 31-2 23.6 8.7 0.9 26.10368 32-1 22.6 8.2 -3.0
]V 26.10369 26.10370 32-2 33-1 22.6 22.6 8.2 8.2 3.9 1.6 26.10371 33-2 22.6 8.2 -0.7 26.26008 34-1 26.1 9.9 3.7 T01 26.26009 34-2 26.1 9.9 -0.9 26.26010 34-3 26.1 9.9 8.3 26.26011 34-4 26.1 9.9 13.0 26.26012 34-5 26.1 9.9 -0.9 26.26013 34 6 26.1 9.9 1.4 26.20014 34-7 26.1 9.9 7.9 26.26015 34-8 26.1 9.9 -5.6 26.26016 34-9 26.1 9.9 -5.6 26.31834 35-1 24.9 9.3 0.0 26.31835 35-2 24.9 9.3 2.3 26.31836 35-3 24.9 9.3 -2.3 26.31837 36-1 24.9 9.3 9.3 4
26.31838 36-2 24.9 9.3 0.0 26.31839 36-3 24.9 9.3 2.3 26.31840 37-1 24.9 9.3 4.6 26.31841 37-2 24.9 9.3 11.6 26.31842 37-3 24.9 9.3 9.3 26.26017 38-1 26.1 9.9 24.5 26.26018 38-2 26.1 9.9 -7.9 26.26019 38-3 26.1 9.9 -7.9 [mj 26.26028 39-1 26.1 9.9 9.9 17.6 v 26.26029 39-2 26.1 1.4 26.26030 39-3 26.1 9.9 8.3 26.26031 40-1 26.1 9.9 -3.2 Page 4:RSABS:V2.17.1.a.10.10.% Page 30
Plant Systems Corrected Field Activity Values Removable Surface Activity - Beta Survey r f$$$$ [a=~~ Location Code: D7502TZZZZEZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 562.5 dpm/100 cm2 Italic values exceed 750.0 dpm/100 cm'. Medium RC# Location ID - MDA Critical Activity Reason Code Location # Level Code B0018 26.26032 40-2 26.1 9.9 14 T01 26.26033 40-3 26.1 9.9 -0.9 O l O Page 5:RSABS:V2.17.1.a.10.10.96 Page 31
Graph of Activity versus Location Series Removable Surface Activity - Beta Survey
-R = d=M _
Location Code: D7502TZZZZEZ Survey Reasons: C01 - Characterization, T01 - Initial Final Release Mediurn Code: B0018 Guideline Value 750.0 dpm/100 cm' 800 ,-
~~l. - . . - . . . . . . . . . . . . _ . - - . . . . . . . . - . . . . _ . . - _ . _ . . . . . _ - - - . . . . . - . . . . . . . . . - _ . _ _ _ . . . . _ . -~~
700---------------.-------------------------- -------------------------- 600 - - - - - - - - - - - - - - ---------------- ------- ----------------------------- i
~~., 500-------- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -~~
~~j 2 a v g 400 + - - - - - - - - - - - - ------------------------------------- ---------------- E ct.~~
~~=o 300- ---------------------------------------------------------------- ---~~
t , Z 200 --------------------------- ---------------------------------- 7---- 100- ------------------------------------------------------------------- 0 %hhb~- = MI b~'~iAbM2k - b#5h5kbA 1
-100 "!HWH4HHFHHHHHfHHH4HHtHHHHHHHHHHH i ! ! U U l l l l l l l U ! HHHHtHH H ;i U ! ! ' U ! U tHi ; U U l ll ' l l l l l l l-Location Series ----- Critical level -*-MDA Guideline Value -.- Activity Page 6:RSABS:V2.17.1.a.10.10.96 Page 32 GRFSL7L8.FSL
r Laboratory Equipment Used Removable Surface Activity - Beta Survey g gg =g _ Location Code: D7502TZZZZEZ Survey Reasons: C01 - Characterization, T01 - Initial Final Release Medium Code: B0018 Location Range Survey User ID Laboratory Serial Equipment Number 2-1 to 2-6 JDT2759 LB-5100W SN5100W 3-1 to 34 JDT2759 LB-5100W SN5100W 121 to 12-2 JDT2759 LB-5100W SN5100W 13-1 to 13-2 20-1 to 20-2 JDT2759 JDT2759 LB-5100W LB-5100W SN5100W SN5100W g 27-1 to 27-2 JDT2759 LB-5100W SN5100W 32-1 to 32-2 JDT2759 LB-5100W SN5100W 33-1 to 33-2 JDT2759 LB-5100W SN5100W 5-1 to 5-2 JMS1149 LB-5100W SN5100W 6-1 to 6-4 JMS1149 LB-5100W SN5100W 7-1 JMS1149 LB-5100W SN5100W 8-1 to 8-2 JMS1149 LB-5100W SN5100W 9-1 JMS1149 SN5100W LB-5100W 10-1 to 10-2 JMS1149 LB-5100W SN5100W 11-1 to 11-2 JMS1149 LB-5100W SN5100W 16-1 to 16-2 JMS1149 LB-5100W SN5100W 28-1 to 28-2 JMS1149 LB-5100W SN5100W 29-1 to 29-2 JMS1149 LB-5100W SN5100W 30-1 to 30-2 JMS1149 LB-5100W SN5100W Program Version: V2.17.1.a.10.10.96 Report Printed At: 11:00:33 AM on 10/12/96 Page 7:RSABS:V2.17.1.a.10.10.96 Page 33 FSR_LSYS.FS
Laboratory Equipment Used - Removable Surface Activity - Beta Survey g gram. Location Code: D7502TZZZZEZ Survey Reasons: C01 - Characterization, T01 - Initial Final Release Medium Code: B0018 Location Range Survey User ID Laboratory Serial Equipment Number 31-1 to 31-2 JMS1149 LB-5100W SN5100W 23-1 to 23-2 LCF0451 LB-5100W SN5100W : 14-1 to 14-8 PDG1526 LB-5100W SN5100W I 17-1 to 17-3 PDG1526 LB-5100W SN5100W ! O(> 18-1 to 18-3 PDG1526 LB-5100W SN5100W 19-1 to 19-3 PDG1526 LB-5100W SN5100W 25-1 to 25-8 PDG1526 LB-5100W SN5100W 26-1 to 26-8 PDG1526 LB-5100W SN5100W 34-1 to 34-9 PDG1526 LB-5100W SN5100W i 35-1 to 35-3 PDG1526 LB-5100W SN5100W 36-1 to 36-3 PDG1526 LB-5100W SN5100W 37-1 to 37-3 PDG1526 LB-5100W SN5100W 38-1 to 38-3 PDG1526 LB-5100W SN5100W 39-1 to 39-3 PDG1526 LB-5100W SN5100W 40-1 to 40-3 PDG1526 LB-5100W SN5100W 4-1 to 4-2 RLN4080- SN5100W LB-5100W 15-1 to 15-4 RLN4080 LB-5100W SN5100W 21-1 to 21-2 RLN4080 LB-5100W SN5100W 22-1 to 22-2 RLN4080 LB-5100W SN5100W l l Program Version: V2.17.1.a.10.10.96 i Report Printed At: 11:00:44 AM on 10/12/96 Total Pages: 8 Page 8:RSABS:V2.17.1.a.10.10.%
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Scientific Ecology Group, Inc. gg Radiological Engineering & Decommissioning Services ~ ~ ~ ~ Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record Contents Survey Area Survey Area ID: Survey Area Description Pages D7500 Turbine Vents & Drains, Control Room HVAC 2-4 Survey Unit (s) Location Code Survey Unit Description Pages Turbine Building Vent and Drain, Building Hot D7503 TZZZZ EZQ01 Water Heating, Control Room and Service Building 5-36 H'/AC O Prepared By: N[ SEG Radidlogisfal Gngineer wk / /O'-24-fg Date l Reviewed By: f' SEG Profect Radiation Protection Manager
~~/ t o f A' l'I' Date Approved By: - e / e s n. E r, roasr / /o/2 < //4 PSCo Radiation Protection Manager Date O~~
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Scientific Ecology Group,Inc. gg Radiological Engineering & Decommissioning Senices -~~ Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record - Survey Area Survey Area ID: D7500 Survey Area
~~Description:~~
Turbine Vents & Drains, Control Room HVAC, System 75 Survey Area Packages: This Survey Area was segrege.ted and surveyed in accordance with the following survey packages: D7501 Turbine Vents & Drains, Control HVAC D7502 Turbine Building Ventilation D7503 QC Survey for Survey Package D7501 (Turbine Vents & Drains, Control Room HVAC) Package D7501 was used to survey Control Room and Service Building ventilation and the Turbine Building vents and drains. This survey unit was originally classified as unaffected, but, due to elevated activity found during final survey in the Control Room and Service Building ventilation filters that exceeded reclassification criteria, was reclassified as an affected plant system survey unit. This survey unit was randomly selected to have a QC Verification survey I,} performed which was accomplished with package D7503. Measurement locations are indicated on the attached drawing and location table. Package D7502 was used to survey the Turbine Building ventilation system. This system was initially classified as an affected plant system due to elevated activity found in the ventilation system filters and heat exchangers during characterization surveys. Measurement locations are indicated on the attached drawing and location table. Survey Area Operational History: The Turbine Vents & Drains, Control Room HVAC System was in operation prior to plant shutdown August 18, 1989. Primary purposes were: 1) to convey the various vents, drains and relief valve discharges from the turbine building equipment and piping to atmosphere, to waste, to the drain collector tank, or to the condenser as required; 2) to provide hot water for use in heating the building spaces in the reactor and turbine plants; and 3) to provide filtered, heated and/or cooled, humidified or dehumidified air to the control room, reactor engineer's office, auxiliary electrical equipment room, 480V switchgear room, and service building. Prior to commencement of characterization and final surveys, this system had no history of radioactive contamination. O Page 2
Survey Area Decommissioning and Remediation Activities: For D7501, Control Room and Service Building HVAC air handling unit prefilters and sock O filters were replaced due to elevated activity found during final survey. The survey of locations
, 45 (Control Room ventilation filter), and 48 (Service Bui! ding ventilation filter), indicated elevated readings that range from about 1,700 dpm/100 cm 2 to 3,300 dpm/100 cm2, which 4 exceeded unaffected system reclassification criteria. The elevated readings were confined to the prefilter and sock filter elements where concentration of activity could occur over a long period of time. No elevated activity was found in the ventilttion ducting or air handling unit or filter housings. D7501 was therefore reclassified as an affected plant system survey unit. More detailed information is found in Investigation #1 of this release record.
For D7502, characterization surveys indicated elevated activity on ventilation inters and heat exchangers (which due to a buildup of dust / debris also acted as filters). Characterizction survey results indicated total surface activity as high as about 8,800 dpm/100 cm'. While much of this activity was determined to be due to natural radioactivity (i.e., radon daughters), Co-60 and Cs-137 were also identified in gamma isotopic analysis performed on removed dust / debris and illter elements. Therefore, the filters were replaced and the heat exchangers (which could not be thoroughly cleaned and surveyed) were removed. As a icsult of the characterization activities this survey unit was surveyed as an affected plant system survey unit. Final characterization survey results are also included in the survey data for this survey unit.
~~~ Isolation and Control Measures: Level 2 Controls Access doors / covers were replaced upon completion of survey of ventilation components and O~~
Level 2 Isolation and Control labels were placed adjacent to access points. For Turbine Building drains, Level 2 Isolation and Control labels were also placed at sump and drain tank openings. This system is in use and will remain in service during repowering. Survey Area
~~Conclusions:~~
For both packages D7501 and D7502, the results of total and removable surface activity measurements collected within this survey area meet the criteria for release for unrestricted use. The levels of removable H-3 and H-3/Fe-55 detected were well below the administrative action level for removable Fe-55 and H-3 activity. The QC Verification survey performed with package D7503 supports the conclusion that survey unit D7501 is acceptable for release for unrestricted use. A survey data comparison graph of the Initial Final Survey and QC Verification measurements is provided in the release record for D7503. O Page 3
l ! Survey Area
~~References:~~
O L i 1) Initial Radiological Site Characterization Report volumes 1,2 and 13. l 2) System Description (SD-75) Turbine Building Vent and Drain, Building Hot Water
Heating, Control Room and Service Building HVAC

3) PI-75-1, 2, 3, 4, 5, 8, and 9, and PF-75-1, 2, 3, 4, 8, and 10

4) DI-067

5) Discussion with PSCo and Westinghouse Team personnel ;
O O Page 4
Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Services gg
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g Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record - Survey Unit Location Code: D7503 TZZZZ EZ Group ID Survey Area Number Surface Category Survey Unit Classification D 7500 System Internals EZ (Affected) Survey Reason: Q01 - QC Verification Survey Unit
~~Description:~~
QC Survey for Survey Package D7501 (Turbine Vents & Drains, Control Room HVAC) Survey Design: Measurement Type No. of Measurements Description 1 Beta Scan N/A Scan accessible internal surfaces of each system ! component. At least 25% of accessible component and pipe internal surfaces were scanned at each survey location. No areas of significantly elevated activity were identified. Total Surface 90 Collected total surface activity measurements at Activity designated locations in 30 plant system components. 12 additional measurements were taken at locations exhibiting radon daughter activity, py Smears 89 Collected removable surface activity measurements at designated locations in 30 plant system components. 12 additional measurements were taken at locations exhibiting radon daughter activity. l Special Samples 1 Removable 'H/"Fe smear was collected at location 41. 8 Sediment samples were distributed evenly across sump and tank bottoms at locations 41 and 43. Page 5
l l l Survey Unit Investigations: : O Investigation #1 l Survey Area D7500 was sub-divided into three separate packages, D7501, D7502 and D7501 > QC. The D7501 QC package should have been given a unique package number since the data analysis database cannot distinguish the difference between the D7501 and D7501 QC package. Also, the D7501 QC package is listed in the Final Survey Area Breakdown Report as D7503. i Package D7501 QC was changed to D7503. Corrections were made to vuious attachments in ; I the survey package and database change form (s) were generated to correct the release records. Note: Location codes on the survey instruction forms, download reports and radiochemistry reports were not changed as the corrections were made once the data was in the final survey database. O l 1 i i r O t I } Page 6 4
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Survey Location Summary at Description Location CI d Number 41 6 - TS A T7501 - Turbine Bldg. Sump TB-L5 (4784') 6 - RSA 1 'H/"Fe 4 - Sediment 42 4 - TSA T7505 - Misc. Drain Tank TB-L5 (4784') 4 - RSA 43 6 - TSA PSC Turbine Bldg. Oil Separator Yard west of Turbine Bldg. 6 - RSA Tank 4 - Sediment 44 1 - TSA Discharge Spool Piece Pump TB-L5 (4784') 1 - RSA P7505 45 6 - TSA F7503 - Control Room Vent TB-L8 (4846') J 6 - RSA Filter 46 12 - TSA S7504 - Control Room Air TB-L8 (4846') 12 - RSA Handling Unit 47 2 - TSA F7502 - Control Room Make Up TB-L8 (4846') 2 - RSA Vent Filter 48 6 - TSA F7505 - Service Bldg. Vent TB-L7 (4829') 6 - RSA Filter 49 12 - TSA S7509 - Service Bldg. Air TB-L7 (4829') 12 - RSA Handling Unit 50 2 - TS A 1" L75601-D25 downstream of TB-L8 (4846') 1-RSA valve V75556 51 6 - TSA Ventilation plenum downstream TB-L8 southeast 6 - RSA of fan C7505 52 2 - TSA Fan C7505 suction plenum TB-L8 souttmast 2 - RSA 53 3 - TSA Ventilation plenum downstream TB-L8 southeast 3 - RSA of DV-75303 (v Page 8
Survey Location Summary (Continued): Survey
' " " Description Location Location CI Number 54 3 - TSA Ventilation plenum downstream TB-L8 3 - RSA of DV-75327 and DV-75328 55 6 - TS A Filter F7503 suction plenum TB-L8 southeast 6 - RSA 56 2 - TSA Control Room ventilation supply TB-L8 southeast 2 - RSA plenum 57 2 - TSA Control Room supply duct TB-L8 southeast 2-RSA upstream of DV-75323 58 1 - TSA Control Room supply duct TB-L8 southeast 1 - RSA upstream of DV-75324 59 2 - TSA Control Room supply duct TB-L8 southeast 2 - RSA upstream of DV-75325 60 1 - TSA Reactor Engineers Office supply TB-Il 1-RSA duct upstream of DV-75326 61 Auxiliary Electrical Equipment TB-L8 2 - TSA Room supply duct upstream of 2-RSA DV-75329 62 Auxiliary Electrical Equipment TB-L6 northeast 2 - TSA Room supply duct downstream 2 - RSA of DV-75329 63 1 - TSA #2 Battery Room supply duct TB-L5 northeast 1-RSA 64 1 - TS A #2 Battery Room exhaust duct TB-L5 northeast 1-RSA 65 3 - TSA Filter F7505 suction plenum Service Building L7 north 3-RSA 66 3 - TSA Air handling unit S7505 supply Service Building L7 north 3 - RSA plenum 67 2 - TSA Supply duct to level 5/6 stairwell Service Building L5 overhead 2-RSA 68 1 - TSA Supply duct to Electrical Shop Service Building L5 1-RSA O
Page 9
Survey Location Summary (Continued): a Description Location i CdI Number 69 1 - TSA Southeast ventilation register in Service Building L6 north 1 - RSA the HP Break Room on Level 6 70 1 - TSA North ventilation register in the Service Building L7 1 - RSA Engineers Office on level 7 Note: Location numbers 1-40 were used in pachge D7502 i i l O l l l O Page 10
i Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Services gg
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g f Fort St. Vrain Nuclear Generating Station Decommissioning Project ; Special Samples ; Location Code: D7503 TZZZZ EZQ01 Comments:
'H/"Fe activity reported in Net dpm/100 cm2 Underlined values exceed the critical level Bold 'H/"Fe values exceed 30,000 dpm/100 cm2 Italic 'H/"Fe values exceed 40,000 dpm/100 cm2 Tritium / Iron-55 Removable Activity Samples Location # Type of Sample Critical Level MDA Activity 41-1 'H/"Fe 18.1 41.0 35.2 l
~~Scale / Sediment Samples MDA l~~
^
Activity Oll Location # Licensed Critical Level Nuclides Identified 41-1 Co-60 2.66E-02 5.52E-02 9.48E-2 41-2 None 8.44E-02* 1.81E-01
N/A 41-3 None 6.98E-02* 1.49E-01* N/A 41-4 None 7.24E-02* 1.58E-Ol

N/A 43-1 None 3.53E-02* 7.33E 02* N/A '
~~1 43-2 None 4.41E-02* 9.35E-02* N/A 43-3 None 4.84E 02* 1.02E-Ol~~
~~N/A 43-4 Cs-137 2.63E-02 5.67E 02 6.34E-02 1~~
1
~~Critical Level and MDA reported for Co-60 )~~
l O Page 11
-. . - . _ - . . . - . . - - . - _ _ _ _ = _ _ _ . _ - . - - _ - . - . .. Comments on Scale / Sediment Samples O The Cs-137 and Co-60 concentrations detected in the sediment samples in package D7301 were below guideline values established for licensed radionuclide concentrations in soil at FSV. , Results were compared to soil values because, should this material ever be released to the : environment, deposition in soil is the most likely scenario. i i i I l I l O O Page 12
Compilation of Statistical Summaries Total Surface Activity - Beta Survey Nd[d(M rr ::.:=::::.::=.~_ Removable Surface Activity - Beta Survey Location Code: D7503TZZZZEZ Medium Codes: B0002, B0018, B0019, B0023, B0037, B9999 Comments: Total Surface Activity (TSA) reported in Net dpm/100 cm2 Removable Surface Activity (RSA) reported in Net dpm/100 cm2 TSA RSA Upper Confidence Limit (UCL) Mean 528.7 433.2 9.1 6.0 h Maximum 2,243.0 145.8 Minimum -427.6 -6.9 Standard Deviation 577.2 18.8 Minimum Detectable Activity 995.7 24.9 Critical Level 462.2 9T Samples Reported 102 101 l Samples Prescribed 90 89 l 9 Page 1: ERGS:V2.15.1.a.10.1.96 Page 13
p(/ Statistical Summary Total Surface Activity - Beta Survey gg
~~~ m-c.~~
Location Code: D7503TZZZZEZ Survey Reason: Q01 - QC Verification Medium Codes: B0002, B0018, B0019, B0023, B0037, B9999 Net dpm/100 cm2 l Upper Confidence Limit (UCL) 528.7 l l Mean 433.2 l l Maximum 2,243.0 l l Minimum -427.6 l l Standard Deviation 577.2 l l Minimum Detectable Activity 995.7 l l Critical Level 462.21 l Samples Reported 102 l l
-l Samples Prescribed S0l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l l MDA < 3,000.0 dpm/100 cm2 YES l Pased l Percent of Samples > 3,000.0 dpm/100 cm2 0.0 l Passed (3) l Number of Samples > 4,000.0 dpm/100 cm2 0 l Passed (4) l ~
l UCL of Mean less than or equal 4,000.0 dpm/100 cm2 YES j Pared i (3) 10% Test (4) Single Measurement Test i Page 1:TSABS:V2.15.1.a.10.1.% Page 14 FSR_ STAT FSL
Plant Systems Corrected Field Activity Values - l Total Surface Activity - Beta Survey p=_EM[d m Location Code: D7503TZZZZEZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 3,000.0 dpm/100 cm2 Italic values exceed 4,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0002 519-3 41-1 15 688.4 323.7 -178.3 001 41-2 676.9 318.0 259.4 41-3 714.5 336.8 229.2 41-4 680.7 319.9 168.8 41-5 615.8 287.4 697.2 41-6 699.7 329.4 531.1 539-3 43-1 760.0 359.8 230.2 43-2 850.9 405.3 -261.0 43-3 773.2 366.4 66.5 43-4 786.2 372.9 -127.0 43-5 725.9 342.8 453.5 43-6 715.3 337.5 155.8 B0018 551-3 47 1 588.3 273.9 358.9 47-2 551.8 255.6 284.1 550-3 51-1 597.5 279.3 401.8 51-2 624.8 292.9 186.5 51-3 706.5 333.8 -186.5 51-4 686.2 323.7 28.7 51-5 605.4 283.3 272.6 51-6 665.2 313.2 -28.7 52-1 643.5 302.3 57.4 52-2 560.3 260.7 114.8 53-1 613.2 287.2 932.7 53-2 628.6 294.8 Ju 53-3 693.1 327.1 861.0 549-3 54-1 463.1 212.8 469.0 54-2 438.2 200.4 234.5 54-3 578.1 270.4 110.3 550-3 55-1 668.8 314.9 315.7 55-2 672.3 316.7 129.1 55-3 632.3 296.7 459.2 55-4 589.5 275.3 287.0 Page 2:TSABS:V2.15.1.a.10.1.96 Page 15
I _ ( Plant Systems Corrected Field Activity Values
~~' {=g Total Surface Activity - Beta Survey r,n=r_- .~~
Location Code: D7503TZZZZEZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 3,000.0 dpm/100 cm2 Italic values exceed 4,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # . Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code 80018 550-3 55-5 15 689.6 325 4 -71.7 0 01 55-6 668.8 314.9 28.7 549-3 56 1 672.7 317.7 -427.6 56-2 622.1 292.3 55.2 57-1 513.3 238.0 41.4 57-2 542.7 252.7 55.2 58-1 458.2 210.4 0.0 550-3 59-1 506.3 233.7 -14.3 59-2 439.5 200.3 157.8 60-1 534.0 247.6 143.5 549-3 61-1 554.8 258.7 -262.1 Q (j 61-2 62-1 550.8 550.8 256.7 256.7 13.8 0.0 62-2 517.6 240.1 193.1 63-1 550.8 256.7 .. 317.2 64-1 615.0 288.8 -275.9 550-3 65-1 636.1 298.6 _. 774.9 65-2 675.8 318.5 _.L21DJ 05-3 668.8 314.9 1.406.3 66-1 723.0 342.1 200.9 66-2 585.4 273.3 _ 330.0 66-3 658.1 309.6 0.0 67-1 675.8 318.5 _ 444.8 , 67 2 716.5 338.8 272.6 l 68-1 617.1 289.1 215.2 1 69-1 739.1 350.1 -157.8 70-1 716.5 338.8 -330.0 i B0019 523-3 42-1 539.7 249.7 14.9 . 42-2 632.0 295.8 312.6 42-3 472.8 216.2 59.5 42-4 461.6 210.6 0.0 O l V ' Page 3:TSABS:V2.15.1.a.10.1.% j Page 16 e
Plant Systems Corrected Field Activity Values r== Total Surface Activity - Beta Survey l I$d@$ n,: =:::,w,,. Location Code: D7503TZZZZEZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 3,000.0 dpm/100 cm2 Italic values exceed 4,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0023 568-3 44-1 15 900.3 420.2 -88.3 001 567-3 50-1 60 995.7 462.2 -105.3 50-2 971.1 449.9 -52.6 B0037 550-3 46-1 15 632.3 296.7 1.750.7 46-2 506.3 233.7 1.219.7 46-3 589.5 275.3 200.9 46-4 547.4 254.2 200.9 46-5 581.3 271.2 -57.4 46-6 609.3 285.2 186.5 551-3 46-7 618.4 289.0 822_4 46-8 583.9 271.7 762.6 46-9 556.5 258.0 _L13fL4 46-10 579.4 269.5 792.5 46-11 630.9 295.2 747.7 46-12 532.5 246.0 _ BBfL9 550-3 49 1 639.8 300.4 703.1 49 2 601.5 281.3 129.1 49-3 609.3 285.2 129.1 49-4 617.1 289.1 28.7 49-5 547.4 254.2 _ _ 21,5 1 49-6 476.7 218.9 330.0 551-3 49-7 532.5 246.0 657.9 49-8 626.8 293.1 224.3 49-9 647.1 303.3 -59.8 49-10 579.4 269.5 1.091.6 49-11 574.9 267.2 927.1 49-12 614.2 286.9 1.330.8 I Page 4:TSABS:V2.15.1.a.10.1.96 l Page 17 l
~~n. -. n, j l~~
1 ( O] Plant Systems Corrected Field Activity Values Total Surface Activity - Beta Survey y r = _-. . Location Code: D7503TZZZZEZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 ' Underlined values exceed the critical level. Bold values exceed 3,000.0 dpm/100 cm2 Italic values exceed 4,000.0 dpm/100 cm2 Count time reported in seconds. , Medium Download # Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B9999 551-3 45-1 15 760.2 359.8 1.450.5 0 01 , 45-2 711.5 335.5 1.525.2 45-3 763.6- 361.5 1.345.8 45-4 746.6 353.0 1.016.8 45-5 760.2 359.8 2.243.0 45-6 635.0 297.2 1.973.8 48-1 746.6 353.0 942.1 48-2 796.3 377.9 1.196.3 48-3 715.1 337.3 1.256.1 48-4 711.5 335.5 1.644.9 48-5 750.0 354.8 1.779.4 48-6 711.5 335.5 1.555.1 l l l I
~~,Q V~~
~~Page 5:TSABS:V2.15.1.a.10.1.96 : Page 18~~
~~. nom ,. ]~~
~~I Graph of Activity versus Location Series Total Surface Activity - Beta Survey IMS$ I~~
~~=g=~~
Location Code: D7503TZZZZEZ Survey Reason: Q01 - QC Verification .i Medium Codes: B0002, B0018, B0019, B0023, B0037, B9999 Average Guideline Value 4000.0 dpm/100 cm' 4000 - + ++ +w - " "
~~+~4+++ + + +- r+e :++"--"-*-~++-*+- - -~~
3500- - - - - - - -------------------------------------- --- ----------- 3000- ----------- ---------------- ---------- --- ------ - ------------ 2500- ---- - - - ---------- ------- --------- ---- - - - - - - - -- --- ---
. . I h2000- -- -------- -------------
~~b.-- ------------------ ---- --------- 8~~
~~'. a ,=\~~
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~~--------------------l---------------~~
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~~--.-- ,/--- -- --------- -~~
z ....,w,,asv = . . ./ . ,, . . sw . 7 . . .' ....R s.. 500- 3, a - - - - ,- - - - - - - - - - - ' u :'c--t- . . . * * , x v -*
-- j.d f;; 4. '* * "g p _% *7'^-~-~~%y... - := # - -
~~h 0 * - - -".- '7 g \j'- - =~~
~~\- .s00-. . - ---.-------..-.---.---.----.-- --.-..- ---... ..----. .....-....~~
1
~~-1000 -4 + 4 W -4 ! ! ! 4-4-4 i ! '~~
~~!;: H-H-4-4-4 : ' ; ' !--4-4 4-H ! , !~~
4i.1 ei.s 4.,4 42a 42.s 431 1452 asauniau*!453 ! ! e)! !464 ! ! 4uelo.4-i247 4!t 414 41 414 424 424 43-2 434 434 451 453 455 46-1 46-3 466 46-7 46-9441147-1 48-1 46-3 48-6 46-1 49-3 446 447 4&9 s as-s 4sa ma4 482 4 a 4a4 484 Location Series
--- Critical level -*- MDA -+- Average Guideline Value -.- Activity Page 6:TSABS:V2.15.1.a.10.1.96 Page 19 GRFSL7L8 FSL
l l l Graph of Activity versus Location Series '== Total Surface Activity - Beta Survey gg;m ,,,s d@$ Location Code: D7503TZZZZEZ i Survey Reason: Q01 - QC Verification , l Medium Codes: B0002, B0018, B0019, B0023, B0037, B9999 l Average Guideline Value l 4000.0 dpm/100 cm' 1 4 000 ~*+ ++++ +++* -+ -
~~-*-*-++v++++-*++++++++++++*-*++-++: - r-*-.~~
3500- - - -- ----- -------- --- ------------------------ - - -------- 3000-------- - ---------------------- ---- --- ------------- --- --- -- 2500- ----- ----- ---------------------------------- - ----- ---------- b2000--------- ---- ---------------------- --------- ------- -- ------- 8 j 1500- -- - ----- ---------------------- c6 * /
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~~y 1000 - E ; - . . - - - - - - - ,- - - - - - - - - - - - - - - - - - - - - - - - - - - f- -~~
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500 . - .--.-- .- - l 4-4-4 ' l t i ! f-4 l 1!,!.'. .l ' 4-4-4 4 @ !<i4144
-1000"AMIE7si 4--4-4&-4 4-f+YiiYAfAEh?AYA?hf$YAfk$'hYA?kPh$2;p;p;pg74p47471 Location Series ---- Critical level -- - MDA -+- Average Guideline Value --.- Activity ,
~~1 i~~
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Page 7:TSABS:V2.15.1.a.10.1.96 Page 20 j GRFSL7LB FSL
Background Correction Values - Total Surface Activity - Beta Survey EiB i.g=._LMn.i
~~-A Location Code: D7503TZZZZEZ Comments: Field Background (Bkg) reponed in cpm / detector area.~~
Medium Bkg reported in dpm/100 cm2 Count time reponed in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0002 519-3 41-1 02201 15 TM001 340.0 767.0 0 01 41-2 328.0 41-3 368.0 41-4 332.0 41-5 268.0 41-6 352.0 539-3 43-1 02200 432.0 43-2 548.0 43-3 448.0 43-4 464.0 43-5 392.0 43-6 380.0 l 1 B0018 551-3 47-1 248.0 0.0 47-2 216.0 550-3 51-1 280.0 51-2 308.0 51-3 400.0 51-4 376.0 5 !-5 288.0 51-6 352.0 52-1 328.0 i 52-2 244.0 l 1 53-1 296.0 53-2 312.0 53-3 384.0 549-3 54-1 02201 176.0 54-2 156.0 54-3 284.0 550-3 55-1 02200 356.0 55-2 360.0 55-3 316.0 55-4 272.0 Page 8:TSABS:V2.15.1.a.10.1.96 Page 21 j l
Background Correction Values (O"
/
~~Total Surface Activity - Beta Survey~~
~~-Ed$$~~
g.a2,.u. a. Location Code: D7503TZZZZEZ Comments: Field Background (Bkg) reported in epm / detector area. Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0018 , 550-3 55-5 02200 15 TM001 380.0 0.0 0 01 55-6 356.0 549-3 56-1 02201 392.0 56-2 332.0 57-1 220.0 57-2 248.0 58-1 TS001 172.0 550-3 59-1 02200 TM001 196.0 59-2 144.0 60-1 TS001 220.0 549-3 61-1 02201 TM001 260.0 Q 61-2 256.0 V 62-1 62-2 256.0 224.0 63-1 TS001 256.0 64-1 324.0 550-3 65-1 02200 TM001 320.0 65-2 364.0 65-3 356.0 66-1 420.0 66-2 268.0 66-3 344.0 67-1 364.0 67-2 412.0 68-1 TS001 300.0 69-1 440.0 70-1 412.0 B0019 523-3 42-1 TM001 208.0 42-2 292.0 42-3 156.0 42-4 148.0 i v Page 9:TSABS:V2.15.1.a.10.1.96 Page 22
~~===~~
~~Background Correction Values Total Surface Activity - Beta Survey [$$$fb~~
~~,q:.=a;_~~
Location Code: D7503TZZZZEZ Comments: Field Background (Bkg) reported in cpm / detector area. Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0023 568-3 44-1 02202 15 TS001 268.0 0.0 001 567-3 50-1 02301 60 TM001 57.0 50-2 54.0 B0037 550-3 46-1 02200 15 316.0 46-2 196.0 46-3 272.0 46-4 232.0 46-5 264.0 46-6 292.0 551-3 46-7 276.0 46-8 244.0 46-9 220.0 46-10 240.0 l 46-11 288.0 ) 46-12 200.0 550-3 49-1 324.0 49-2 284.0 49-3 292.0 49-4 300.0 49-5 232.0 49-6 172.0 551-3 49-7 200.0 49-8 284.0 49-9 304.0 49-10 240.0 49-11 236.0 49-12 272.0 ; O Page 10:TSABS:V2.15.1.a.10.1.96 Page 23
Background Correction Values Total Surface Activity - Beta Survey ggg
~~,%:=r. =~~
l Location Code: D7503TZZZZEZ j Comments: Field Background (Bkg) reponed in cpm / detector area. . Medium Bkg reponed in dpm/100 cm2 l Count time reponed in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B9999 551-3 45-1 02200 15 TM001 428.0 0.0 0 01 45-2 372.0 45-3 432.0 45-4 412.0 45-5 428.0 45-6 292.0 48-1 412.0 48-2 472.0 48-3 376.0 46-4 372.0 : 48-5 416.0 ) 48-6 372.0 l l l i O Page 11:TSABS:V2.15.1.a.10.1.96 Page 24
Summary of Efficiency Values Total Surface Activity - Beta Survey f,g
~~= 7,,-~~
Location Code: D7503TZZZZEZ Survey Reason: Q01 - QC Verification Comments: Detector Detedor Download # Efficiency Model Serial Number -Station # LMI 43-106B PR128925 519-3 0.212 LMI 43-688 PR119340 523-3 0.215 LMI4348B PR119340 539-3 0.215 LMI 43-106B PR128925 549-3 0.232 LMI 43-688 PR092523 550-3 0.223 LMI 43-03B PR092523 551-3 0.214 LMI 43-94P100 PR124111 567-3 0.038 LM143-68/S PR119340 568-3 0.145 O O Page 12:TSABS:V2.15.1.a.10.1.96 Page 25
Survey Detection Equipment Used - g Total Surface Activity - Beta Survey g e m _--- . Location Code: D7503TZZZZEZ Survey Reason: Q01 - QC Verification Medium Codes: B0002, B0018, B0019, B0023, B0037, B9999 Download # - Survey User ID M2350 S/N Detector Station Id S/N 519-3 DAB 9854/126175 126175 PR128925 523-3 DAB 9854/117566 117566 PR119340 539-3 DAB 9854/117566 117566 PR119340 k]
/ 549-3 550-3 551-3 ELS8308/126175 DAB 9854/95361 DPS4133/95361 126175 95361 PR128925 PR092523 95361 PR092523 567-3 DPS4133/126179 126179 PR124111 568-3 AOK2982/117566 117566 PR119340 l
l Program Version: V2.15.1.a.10.1.96 Report Printed At: 08:13:02 AM on 10/02/96 Total Pages: 13 Page 13:TSABS:V2.15.1.a.10.1 % Page 26 F ER.SYS FSL
Quality Control Measurement Comoarision - Quality Control Total Surface Activity - Beta Survey R @ f55
~~.. ,. _-. a. _~~
I Location Code: D7501ZZZZZEZ, D7503ZZZZZEZ l Survey Reasons: T01 - Initial Final Release, G01 - Investigation, G02 - Investigation, R01 - Remediation, Q01 - QC Verification l 1 Medium Codes: B0002, B0018, B0019, B0023, B0037, B9999 Comments: The quality control (QC) verification survey results and conclusion are consistent with the initial survey results. The graph below comparcs the total surface activity measurements of the original survey to the QC verification survey. Average Guideline Value 4000.0 dpm/100 cm8 12000 115001------------------------------------------------------------------ 11000, ------------------------------------------------------------------- . 10500- -------------- ---------------------------------------------------- l 100002 ------------------------------------------------------------------- l 9500- ------------------------------------------------------------------- 9000- ------------------------------------------------------------------- l l 85002 ------------------------------------------------------------------- ' 8000: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
,. 75001 ------------------------------------------------------------------- l E 7000- -------------------------------------------------------------------
u 65002 ------------------------------------------ ------------------------ 8 6000- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
~~- 5500- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - '~~
E ' 2 5000i ------------------------------------------------------------------- l
*G 4500+-------------------------------------------------------------- <
t 40002 ------------------------------------------------------------------- JC 3500f ------------------------------------------------------------------- ) 3000------------------------------------------------------------------- 25001----------------------------------------------------------------- 20002---------------,b--------------------------------------- ------ 1500i ------
~~- - - - - ---wl-'--*--~~
~~1000- -------- 500- - +?n - -~~
~~- - - - - - rd - ',5 - - - ----------------~~
~~N * - - $ - - . S--J------ O N M ,b,A.' A- -- J& .-~~
-- -- Y-h-- W,----l?-w - - g - " ,#. Y- %, c, " y-]--- ---------d" y
~~500 , 7- .~~
~~-1000 7''mt------------------------------------h--~~
~~nu; . .''u,'o'm'.''.'.''m''m,mo.'mo''''''''''''m'~~
~~,,,, m.' . . . .ou. uom o u..ooo.um, o Location ID - Number D7501 - . D7503 (QC)~~
O Page 1:QCTSABS:V2.16.1.a.10.7.96 Page 27
Statistical Summary - Removable Surface Activity - Beta Survey y.g = ,. g.., Location Code: D7503TZZZZEZ Survey Reason: Q01 - QC Verification Medium Codes: B0002, B0018, B0019, B0023, 80337, B9999 Net dpm/100 cm2 l Upper Confidence Limit (UCL) 9.1l l Mean 6.0 l l Maximum 145.8 l l Minimum -6.9 l , n l Standard Deviation 18.8 l l J V l Minimum Detectable Activity 24.9 l
l Critical Level 9.3 l l Samples Reported 101 l l Sampies Prescribed 89l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 187.5 dpm/100 cm2 YES l Passed l Percent of Samples > 562.5 dpm/100 cm2 0.0 l Passed (3) l Number of Samples > 750.0 dpm/100 cm2 0 l Passed (4) l UCL of Mean less than or equal 750.0 dpm/100 cm2 YES l Passed l (3) 10% Test (4) Single Measurement Test i
f d Page 1:RSABS:V2.15.1.a.10.1.% Page 28 FSR STAT FSL
Plant Systems Corrected Field Activity Values - Removable Surface Activity - Beta Survey i.=Eb m Location Code: D7503TZZZZEZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 562.5 dpm/100 cm2 Italic values exceed 750.0 dpm/100 cm2 Medium RC# Location ID - MDA Critical Activity Reason Code Location # Level Code B0002 26.32480 41-1 24.9 9.3 -2.3 001 26.32481 41-2 24.9 9.3 4.6 26.32482 41-3 24.9 9.3 -4.6 20.32483 41-4 24.9 9.3 0.0 26.32484 41-5 24.9 9.3 -2.3 26.32485 41-6 24.9 9.3 -2.3 26.32534 43-1 22.2 8.0 -0.5 26.32535 43-2 22.2 8.0 -5.1 26.32536 43-3 22.2 8.0 4.2 26.32537 43-4 22.2 8.0 -0.5 26.32538 43-5 22.2 8.0 6.5 26.32539 43-6 22.2 8.0 4.2 80018 26.32822 47 1 24.9 9.3 -4.6 26.32823 47 2 24.9 9.3 -4.6 26.32728 51-1 24.9 9.3 2.3 26.32729 51-2 24.9 9.3 13.9 26.32730 51-3 24.9 9.3 16.2 26.32731 51 4 24.9 9.3 13.9 26.32732 51-5 24.9 9.3 4.6 26.32733 51-6 24.9 9.3 18.5 26.32734 52-1 24.9 9.3 -2.3 26.32735 52-2 24.9 9.3 0.0 26.32736 53-1 24.9 9.3 2.3 26.32737 53-2 24.9 9.3 -6.9 26.32738 53-3 24.9 9.3 6.9 26.32763 54-1 24.9 9.3 16.2 26.32764 54-2 24.9 9.3 . 16.2 26.32765 54-3 24.9 9.3 9.3 26.32739 55-1 24.9 9.3 6.9 26.32740 55-2 24.9 9.3 2.3 26.32741 55-3 24.9 9.3 4.6 26.32742 554 24.9 9.3 4.6 Page 2:RSABS:V2.15.1.a.10.1.96 Page 29
~~,..,v...,~~
~~C O Plant Systems Corrected Field Activity Values Removable Surface Activity - Beta Survey~~
~~-am = = = ,~~
Location Code: D7503TZZZZEZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 562.5 dpm/100 cm2 Italic values exceed 750.0 dpm/100 cm2 Medium RC# Location ID - MDA Critical Activity Reason Code Location # Level Code B0018 26.32743 55-5 24.9 9.3 4.6 001 26.32744 55-6 24.9 9.3 -2.3 26.32771 56-1 24.9 9.3 -4.6 26.32772 56-2 24.9 9.3 0.0 26.32768 57-1 24.9 9.3 -2.3 26.32769 57-2 24.9 9.3 2.3 26.32770 58-1 24.9 9.3 0.0 26.32745 59-1 24.9 9.3 -2.3 26.32746 59-2 24.9 9.3 0.0 26.32747 60-1 24.9 9.3 -6.9 i 26.32766 61-1 24.9 9.3 -2.3 A 26.32767 61 2 24.9 9.3 4.6 Q 26.32759 26.32760 62-1 62-2 24.9 24.9 9.3 9.3 0.0 6.9 26.32762 63-1 24.9 9.3 2.3 26.32761 64-1 24.9 9.3 -4.6 26.32748 65-1 24.9 9.3 2.3 26.32749 65-2 24.9 9.3 6.9 26.32750 65-3 24.9 9.3 2.3 26.32751 66-1 24.9 9.3 -6.9 26.32752 66-2 24.9 9.3 4.6 l 26.32753 66-3 24.9 9.3 6.9 26.32754 67-1 24.9 9.3 0.0 26.32755 67-2 24.9 9.3 2.3 26.32756 68-1 24.9 9.3 6.9 26.32757 69-1 24.9 9.3 -4.6 26.32758 70-1 24.9 9.3 0.0 B0019 26.32511 42-1 24.3 9.0 5.1 26.32512 42-2 24.3 9.0 1.9 26.32513 42-3 24.3 9.0 2.8 26.32514 42-4 24.3 9.0 2.8 v Page 3:RSABS:V2.15.1.a.10.1.% Page 30
Plant Systems Corrected Field Activity Values
~~-E M FJd Removable Surface Activity - Beta Survey ,wm=~~
Location Code: D7503TZZZZEZ Comments: Activity (net), MDA, and CL reponed dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 562.5 dpm/100 cm2 . Italic values exceed 750.0 dpm/100 cm2 Medium RC# Location ID - MDA Critical Activity Reason Code Location # Level Code B0023 26.32959 44-1 22.9 8.3 -0.9 0 01 26.32960 50-1 22.9 8.3 3.7 B0037 26 32716 46-1 24.9 9.3 145.8 26.32717 46-2 24.9 9.3 9.3 26.32718 46-3 24.9 9.3 0.0 26.32719 46-4 24.9 9.3 16.2 26.32720 46-5 24.9 9.3 4.6 26.32721 46-6 24.9 9.3 _ BZ2 26.32816 46-7 24.9 9.3 18.5 26.32817 46-8 24.9 9.3 6.9 26.32818 46-9 24.9 9.3 11.6 26.32819 46-10 24.9 9.3 27.8 26.32820 46-11 24.9 9.3 . 27.8 26.32821 46-12 24.9 9.3 27.8 26.32722 49-1 24.9 9.3 27.8 26.32723 49-2 24.9 9.3 2.3 26.32724 49-3 24.9 9.3 0.0 26.32725 49-4 24.9 9.3 -4.6 26.32726 49-5 24.9 9.3 -4.6 26.32727 49-6 24.9 9.3 -2.3 26.32824 49-7 24.9 9.3 9.3 26.32825 49-8 24.9 9.3 0.0 26.32826 49-9 24.9 9.3 2.3 26.32827 49-10 24,9 9.3 . 30.1 26.32828 49-11 24.9 9.3 4.6 26.32829 49-12 24.9 9.3 .. 18.5 O Page 4:RSABS:V2.15.1.a.10.1.96 Page 31
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Plant Systems Corrected Field Activity Values == t' IBM!Lii Removable Surface Activity - Beta Survey gca._. a-Location Code: D7503TZZZZEZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 562.5 dpm/100 cm2 Italic values exceed 750.0 dpm/100 cm2 Medium RC# Location ID - MDA Critical Activity Reason Code Location # Level Code B9999 26.32810 45-1 24.9 9.3 -2.3 0 01 26.32811 45-2 24.9 9.3 -4.6 26.32812 45-3 24.9 9.3 2.3 26.32813 45-4 24.9 9.3 -4.6 26.32814 45-5 24.9 9.3 0.0 26.32815 45-6 24.9 9.3 -6.9 26.32804 48-1 24.9 9.3 0.0 26.32805 48-2 24.9 9.3 -2.3 26.32806 48-3 24.9 9.3 4.6 26.32807 48-4 24.9 9.3 -2.3 1 I 20.32808 48-5 24.9 9.3 0.0 484 0 26.32809 24.9 9.3 -2.3 1 1 I 1 l l l l l
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C 1 Page 5:RSABS:V2.15.1.a.10.1.96 Page 32 l
i I I Graph of Activity versus Location Series Removable Surface Activity - Beta Survey
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n' . . ~ Location Code: D7503TZZZZEZ Survey Reason: Q01 - QC Verification Medium Codes: B0002, B0018, B0019, B0023, B0037, B9999 Guideline Value 750.0 dpm/100 cm8 800 700- -------------------------------------------------------------------- I soo- -------------------------------------------------------------------- 500- --------------------------------------------------.----------------- E u g 400- _------------------------------------------------------------------- E tc. 300- -------------------------------------------------------------------- e Z 200- -------------------------------------------------------------------- 100-
~~------------------A------------------------------------------------~~
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Locaffon Series Critical Level --.-- MDA --.- Guideline Value --.-- Activity Page 6:RSABS:V2.15.1.a.10.1.96 Page 33 GRFSL7L8 FSL
(' Laboratory Equipment Used Removable Surface Activity - Beta Survey g g= m Location Code: D7503TZZZZEZ Survey Reason: Q01 - QC Verification Medium Codes: B0002, B0018, B0019, B0023, B0037, B9999 i Location Range Survey User ID Laboratory Serial Equipment Number 44-1 AOK2982 LB-5100W SN5100W l 45-1 to 46-12 AOK2982 LB-5100W SN5100W 47-1 to 47-2 AOK2982 LB-5100W SN5100W m 48-1 to 49-12 AOK2982 LB-5100W SN5100W
) 50-1 AOK2982 LB-5100W SN5100W 42-1 to 42-4 DAB 9854 LB-5100W SN5100W 43-1 to 43-6 DAB 9854 LB-5100W i
SN5100W . 49-1 to 49-6 DAB 9854 LB-5100W SN5100W l 51-1 to 51-6 DAB 9854 LB-5100W 54-1 to 54-3 SN5100W i DTS6208 LB-5100W SN5100W l 57-1 to 57 2 DTS6208 LB-5100W SN5100W 61-1 to 61-2 DTS6208 LB-5100W SN5100W 62-1 to 62-2 DTS6208 LB-5100W SN5100W i 56-1 to 56-2 ELS8308 SN5100W LB-5100W 58-1 ELS8308 LB-5100W SN5100W Program Version: V2.15.1.a.10.1.96 q Report Printed At: 07:54:56 AM on 10/02/96 V , Page 7:RSABS:V2.15.1.a.10.1.% Page 34 FSR_LSYS.FS
Laboratory Equipment Used Removable Surface Activity - Beta Survey gam _ Location Code: D7503TZZZZEZ Survey Reason: Q01 - QC Verification Medium Codes: B0002, B0018, B0019, B0023, B0037, B9999 Location Range Survey User ID Laboratory Serial Equipment Number 63-1 ELS8308 LB-5100W SN5100W 64-1 ELS8308 LB-5100W SN5100W 41-1 to 41-6 JMS1149 LB-5100W SN5100W 46-1 to 46-6 JMS1149 LB-5100W SN5100W 52-1 to 52-2 JMS1149 LB-5100W SN5100W 53-1 to 53-3 JMS1149 LB-5100W SN5100W 55-1 to 55-6 JMS1149 LB-5100W SN5100W 59-1 to 59-2 JMS1149 LB-5100W SN5100W 60-1 JMS1149 LB-5100W SN5100W 65-1 to 65-3 JMS1149 LB-5100W SN5100W 66-1 to 66-3 JMS1149 LB-5100W SN5100W 67-1 to 67-2 JMS1149 LB-5100W SN5100W 68-1 JMS1149 LB-5100W SN5100W 69-1 JMS1149 LB-5100W SN5100W 70-1 JMS1149 LB-5100W SN5100W Program Version: V2.15.1.a.10.1.96 Report Printed At: 07:55:05 AM on 10/02/96 Total Pages: 8 Page 8:RSABS:V2.15.1.a.10.1.96 Page 35 FSR_LSYS FS
Quality Control Measurement Comparision Quality Control Removable Surface Activi - Beta Survey ID@@ l
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Location Code: D7501ZZZZZEZ, D7503ZZZZZEZ ; l 1
Survey Reasons: T01 - Initial Final Release, G01 - Investigation R01 - Remediation, Q01 - QC l I Verification Medium Codes: B0002, B0018, B0019, B0023, B0037, B9999 l
2 Comments: The quality control (QC) verification survey results and conclusion are consistent with the initial survey results. The graph below compares the removable surface activity measurements of the original survey to the QC verification survey. Average Guideline Value 750.0 dpm/100 cm8 l 800 . I J 700- -------------------------------------------------------------------- 1
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~~600--------------------------------------------------------------------- j i 500- -------------------------------------------------------------------- E u~~
~~$ 400- --------------------------------------------------------------------~~
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~~--.- D7501 - .- D7503 (QC)~~
Page 1:QCRSABS:V2.16.1.a.10.7.% Page 36
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Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Senices ~~~~ Fort St. Vrain Nuclear Generating Station Decommissioning Project
~~Release Record Contents Survey Area Survey Area ID: Survey Area Description Pages D8200 Instrument and Service Air 2-3 i~~
Survey Unit (s) i Location Code Survey Unit Description Pages D8200 ZZZZZ DZT01 D8200 ZZZZZ DZC01 Instrument and Service Air 4-23 D8200 ZZZZZ DZE01 ' l l Prepared By: ] SEG Rapkdqid Engineer
~~& / /D-2V- 7 Date " N / t Cf'lt Reviewed By: /~~
SEG Prqje6t Radiation Protection Manager Date Approved By: OkhPi87' / /0/25['76 PSCO Radiation iYofection Manager Date Page 1
Scientific Ecology Group, Inc. g t Radiological Engineering & Decommissioning Senices ~~~
~~' Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record - Survey Area Survey Area / Package ID: D8200 Survey Area~~
~~Description:~~
~~Instrument and Service Air, System #82 Survey Package~~
~~Description:~~
Instrument and Service Air The instrument air system provided clean, oil-free air for the various pneumatically operated control valves, block valves, control systems, and instruments in the turbine and reactor plants. The service air system provided a source of compressed air for general service in the turbine and reactor plants. The system also served as a back-up to the instrument air system, as a decontaminating agent in the reactor plant, and as a back-up to the air compressor furnir.hed with the condensate demineralizer for transporting and/or mixing demineralizer resirs. The Instrument and Service Air system was surveyed as an Unaffected Survey Unit. Measurement locations were marked on the attached maps to designate where sample Qq measurements were collected, i Survey Area OperationalIIistory: The Instrument and Service Air System was in operation prior to plant shutdown August 18, 1989. The turbine side portion of the Instrument and Service Air system will be used for repower. The Instrument and Service Air System had no history of radioactive contamination events. Survey Area Decommissioning and Remediation Activities: No radiological decommissioning or remediation was performed for System 82. Isolation and Control Measures: Level 2 Controls When appropriate, disassembled components were reassembled following survey. If reassembly was delayed or not performed, component openings were sealed with tape or other appropriate material to maintain isolation control. O Page 2
i Survey Area
~~Conclusions:~~
The results of total and removable surface activity measurements collected within this survey O area meet the criteria for release for unrestricted use. The level of removable H-3 measured was below the detection MDA. Survey Area
~~References:~~
Initial Radiological Site Characterization Report Volumes 1,2, and 13. SD Instrument and Service Air System (90-PF-82-1; 90-PI-82-1 to 90-PI-82-16) Discussion with various PSCo and Westinghouse personnel. O O Page 3
g Scientific Ecology Group, Inc. gggg Q Radiological Engineering & Decommissioning Services Fort St. Vrain Nuclear Generating Station Decommissioning Project
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Release Record - Survey Unit Survey Package ID: D8200 Location Code: D8200 ZZZZZ DZ Group [D Survey Area Number Surface Category Survey Unit Classification D 8200 System Internals DZ (Unaffected) Survey Reason: T01 - Initial Final Release C01 - Characterization E01 - Replacement Survey Unit
~~Description:~~
System 82, Instrument and Service Air System Survey Design: Measurement Type No. of Measurements Description Beta Scan N/A Scanned vicinity of each total surface activity location where accessible. No areas of elevated activity were identified. Total Surface 48 Collected at designated locations from 12 Activity plant system components. Eight characterization measurements from survey locations 1 and 2, were included, py Smears 36 Collected at designated locations from 12 plant system components. Eight characterization measurements from survey locations 1 and 2, were included. Special Samples 1 Tritium removable surface activity sample from survey location 3. /~'s 2 Sediment samples from survey locations 3 O and 4. Page 4
l Survey Unit Investigations: Investigation No.1 From survey locations 10,11 and 12 the measured MDA was greater than the target MDA of 1,250 dpm/100 cm2 for an unaffected system (Download report 401-3). The problem was attributed to insufficient count time. A replacement survey was performed using a longer count time at survey locations 10,11 and 12. The replacement survey yielded an MDA less than 1250 dpm/100 cm2 for locations 10,11 and 12. The measurement results obtained from the replacement survey replaced the results of the initial survey for these survey locations. Investigation No. 2 The characterization survey instructions for location 1, prescribed 5 total surface activity measurements and one background measurement collected from the area of the first total surface activity measurement. Survey location I was the Chicago Pneumatic Compressor C-8206 located in the Weld Shop on level 5 of the Turbine Building. A single background measurement, indicative of the internal surface area of the compressor, was collected with a count time of 20 minutes. The current database in use, however, requires a background measurement to be assigned to each total surface activity measurement. Therefore, the ; background value was assigned to each total surface activity measurement. 1 The data from the characterization survey of locations 1 and 2 was evaluated and found to be acceptable and consistent with the Initial Final Release measurements of the survey area. ; j l I Page 5 l
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Radiological Engineering & Decommissioning Services l Fort St. Vrain Nuclear Generating Station Decommissioning Project l Survey Location Summary 1 Survey Measurements Description Location Location Collected Number 1 5 - TSA Chicago Pneumatic Turbine Building, Izvel 5 5 - RSA Compressor (C-8206) Weld Shop 2 3 - TSA Chicago Pneumatic Air Yard, outside of Building 28 3 - RSA Receiver (T8206) 3 6 - TSA T-8201 (Instrument Air Turbine Building Level 5, 6 - RS A Receiver) northeast, Survey Area C0058 1 3 1 - Sediment 4 6 - TSA T-8202 (Service Air Turbine Building Level 5, 6 - RSA Receiver) north, Survey Area C0010 1 - Sediment 5 6 - TSA T-8203 (Instrument Air Turbine Building Level 6, 6 - RSA Receiver) northeast, Survey Area C0023 6 2 - TSA F-8201 (Service Air Filter) Turbine Building Level 5, 2-RSA north, Survey Area C0010 7 2 - TSA Weld Shop Service Air Filter Turbina Building Izvel 5, 2 - RS A Weld Shop, Survey Area C0003 8 2 - TSA F-8207X (Instrument Air Turbine Building Level 6, 2 - RSA After Filter) northeast, Survey Area C0023 O Page 7
i l O Survey Location Number Measurements Collected Description Location 4 9 1 - TSA V-82444 (Check valve cross- Turbine Building Ixvel 5, 1 - RSA connect between instrument north, Survey Area C0013 J and service air) 10 5 - TSA 1.25" L821200, Column M-3 Reactor Building Ixvel 11, 1 - RSA Riser Service Air Supply northwest corner, Survey Area F0133 .__ 11 5 - TSA 1.25" L821201, Column M-2 Reactor Building Ixvel 1, 1 RSA Riser Service Air Supply northwest corner, Survey Area F0008 12 5 - TSA 1.25" L8293, Column J-2 Reactor Building Ixvel 1, 1 - RSA Riser Service Air Supply southwest corner, Survey Area F0006 1 iO l 3 , J Page 8 i
Scientific Ecology Group, Inc. F
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Radiological Engineering & Decommissioning Senices Fort St. Vrain Nuclear Generating Station Decommissioning Project Special Samples Location Code: D8200 ZZZZZ DZT01 Comments: 11-3 activity reported in Net dpm/100 cm2 Sediment activity reported in pCi/g Underlined values exceed the critical level Bold values exceed 250 dpm/100 cm2 Italic values exceed 1,000 dpm/100 cm2 Tritium Removable Activity Samples Location Type of Critical MDA Activity Number Sample Level 3-1 H-3 116.6 239.1 -76.5 Sediment Samples O Location Licensed Critical MDA Activity Number Nuclides Level 3-1 Cs-137 6.07E-03 1.25E-02 2.43E-022, 4-1 None 1.98E-028 4.18E-028 N/A
~~' Critical Level and MDA reported for Co-60 2~~
Low level Cs-137 sediment activity below environmental level in soil l l O Page 9
Compilation of Statistical Summaries . V Total Surface Activity - Beta Survey j$@fj_ Removable Surface Activity - Beta Survey Location Code: D8200TZZZZDZ Medium Codes: B0019, B0020, B0023, B0031 ' Comments: Tc:al Surface Activity (TSA) reported in Net dpm/100 cm2 - Removable Surface Activity (RSA) reported in Net dpm/100 cm2 f TSA RSA t Upper Confidence Limit (UCL) 71.0 4.4 Mean 6.3 2.4
Maximum 631.0 33.3 Minimum -859.4 -6.9 Standard Deviation 266.1' ,
7.2 Minimum Detectable Activity 1,103.8 24.9 Critical Level 525.6 9.3 Samples Reported 48 36 Samples Prescribed 48 36 l i
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X J' Page 1: ERGS:V2.12.1.a.9.13.% Page 10 ! l
Statistical Sununary Total Surface Activity - Beta Survey g
,4, = f, Location Code: D8200TZZZZDZ Survey Reasons: C01 - Characterization, E01 - Replacement, T01 - Initial Final Release Medium Codes: B0019, B0020, B0023, B0031 Net dpm/100 cm2 l Upper Confidence Limit (UCL) 71.0 l l Mean 6.3 l l Maximum 631.0 l l Minimum -859.4 l l Standard Deviation l Minimum Detectable Activity 266.1 l 1,103.8 l g
l Critical Level 525.6 l l Samples Reported 48l l Samples Prescribed 48l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 1,250.0 dpm/100 cm2 YES l Passed l Percent of Samples > 1,250.0 dpm/100 cm2 0.0 l Passed (3) l Number of Samples > 2,500.0 dpm/100 cm2 0 l Passed (4) l UCL of Mean less than or equal 5,000.0 dpm/100 cm2 YES l Passed (3) 10% Test j (4) Single Measurement Test < O I Page 1:TSABS:V2.12.1.a.9.13.96 ! Pag,e 1 l
Plant Systems Corrected Field Activity Values Total Surface Activity - Beta Survey g
~~,e -ram Location Code: D8200TZZZZDZ Comments: Activity (net), MDA, and CL reponed dpm/100 cm2 Underlined values exceed the critical level.~~
Bold values exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 Count time reponed in seconds. Medium Download # Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0019 674-1 2-1 15 633.8 296.6 631.C C01 2-2 617.1 288.2 _d22,! 2-3 681.4 320.3 -46.1 281-3 3-1 539.9 249 6 180.3 T01 3-2 525.0 24~,.1 -420.2 3-3 499.1 229.2 105.2 3-4 410.6 184.9 105.2 3-5 436.1 197.7 60.1 3-6 390.2 174.8 75.1 476-3 4-1 491.2 226.0 -14.5 4-2 454.5 207.6 29.0 0 4-3 4-4 4-5 402.0 454.5 529.7 181.4 207.6 245.2 115.8
~~-29.0 -115.8 4-6 520.4 240.6 43.4 !~~
213-3 5-1 503.0 231.6 14.7 5-2 635.2 297.7 44.0 5-3 619.3 289.8 102.8 5-4 487.6 223.9 88.1 5-5 555.4 257.8 -102.8 5-6 573.2 266.7 -73.4 l B0020 233-3 9-1 180 917.1 432.3 -213.1 l Page 2:TSABS:V2.12.1.a.9.13.% Page 12
Plant Systems Corrected Field Activity Values Total Surface Activity - Beta Survey g g r.r a m _ Location Code: D8200TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 Count time reported in seconds. Medium Download # Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0023 1276-1 10-1 120 780.2 368.9 15.6 E01 10-2 815.1 386.4 -156.3 10-3 883.9 420.8 -500.0 10-4 832.1 394.9 -93.7 10-5 787.3 372.5 -62.5 11-1 883.9 420.8 -250.0 11-2 917.8 437.7 -62.5 11-3 908.7 433.2 0.0 11-4 851.9 404.8 171.9 11-5 825.3 391.5 125.0 12-1 899.5 428.6 -281.3 12-2 896.4 427.0 -187.5 12-3 883.9 420.8 -250.0 12-4 911.7 434.7 -15.6 12-5 938.6 448.1 -859.4 B0031 634-1 11 240 631.5 298.0 275.4 C01 1-2 631.5 298.0 157.4 1-3 631.5 298.0 -157.4 14 631.5 298.0 39.3 1-5 631.5 298.0 314.7 232-3 6-1 15 825.7 383.8 451.0 T01 6-2 912.0 426.9 -472.5 7-1 750.5 346.2 64.4 7-2 764.8 353.3 622 8 233-3 81 180 1,103.8 525.6 445.6 8-2 1,088.2 517.8 58.1 9 Page 3:TSABS:V2.12.1.a.9.13.96 Page 13
4 4 i i i
! Graph of Activity versus location Series b Total Surface Activity - Beta Survey gra=-Ed$$
4 Location Code: D8200TZZZZDZ 4 Survey Reasons: C01 - Characterization, E01 - Replacement, T01 - Initial Final Release ; l l Medium Codes: B0019, B0020, B0023, B0031 i l i l Average Guideline Value 5000.0 dpm/100 cm2 2500 l 2QQQ,,- .-.-.------ ----------------- -,.-----.------------ -------------- 1500- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - G ] ) W~
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) NN h h N- N3 N6 NY 4 4-6 $ NS $ h 1' N NYN42 34 11 ' 1 12k N2 1 1-2 14 21 2-3 3-2 34 34 4-2 44 44 62 64 64 6-2 72 84 141 143 145 11-2 114 12 1 12-3 12-5 Location Series
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~~-+- Average Guideline Value (off-scale) --.- Activity D~~
4 i Page 4:TSABS:V2.12.1.a.9.13.96 l GRF 8 Fg
O Background Correction Values Total Surface Activity - Beta Survey g gram Location Code: D8200TZZZZDZ Comments: Field Background (Bkg) reported in cpm / detector area. Medium Bkg reported in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0019 674-1 2-1 02200 15 TM001 288.0 0.0 C01 2-2 272.0 2-3 336.0 281-3 3-1 02201 204.0 T01 3-2 192.0 3-3 172.0 34 112.0 3-5 128.0 3-6
~~100.0 476-3 4-1 180.0 4-2 152.0 ,~~
4-3 116.0 ' 4-4 152.0 l 4-5 212.0 4-6 204.0 213-3 5-1 02200 184.0 5-2 304.0 l 5-3 288.0 54 172.0 5-5 228.0 l 5-6 244.0 l l l l l B0020 ) 233 3 9-1 02000 180 TS001 30.7 O Page 5:TSABS:V2.12.1.a.9.13.96 Page 15
O Background Correction Values - V. Total Surface Activity - Beta Survey p.B M@
=.y2 Location Code: D8200TZZZZDZ Comments: Field Background (Bkg) reported in cpm / detector area. i Medium Bkg reported in dpm/100 cm2 t Count time reported in seconds.
Medium Code left justified under Dowrdoad#-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0023 1276-1 10-1 02302 120 TM001 51.5 0.0 E01 10-2 56.5 10-3 67.0 10-4 59.0 10-5 52.5 11-1 67.0 11-2 72.5 11-3 71.0 11-4 62.0 11-5 58.0 12-1 09.5 3 12-2 69.0 (Q 12-3 12-4 67.0 71.5 12-5 76.0 B0031 634-1 11 02000 1200 TS001 39.7 C01 1-2 39.7 1-3 39.7 1-4 39.7 1-5 39.7 232-3 6-1 02202 15 TM001 236.0 T01 6-2 292.0 7-1 192.0 7-2 200.0 233-3 8-1 02000 180 45.3 8-2 44.0 a' Page 6:TSABS:V2.12.1.a.9.13.% Page 16
Summary of Efficiency Values Total Surface Activity - Beta Survey g
~~.,.= =~~
Location Code: D8200TZZZZDZ Survey Reasons: C01 - Characterization, E01 - Replacement, T01 - Initial Final Release Comments: Detector Detector Download # Efficiency Model Serial Number -Station # LMI 43-68B PR092525 213-3 0.218 LMI 43-68/S PR095083 232-3 0.149 LMI 44-40B PR092644 233-3 0.111 LMI 43-106B PR128913 281-3 0.213 LMI 43-106B PR128925 476-3 0.221 LMi 44-40B PR095101 634-1 0.123 LMI 43-68B PR119445 674-1 0.213 LMI 43-94/100 PR124110 1276-1 0.032 0 ; O Page 7:TSABS:V2.12.1.a.9.13.96 Page 17 J
1 l , Survey Detection Equipment Used - Total Surface Activity - Beta Survey g=ms l I Location Code: D8200TZZZZDZ l Survey Reasons: C01 - Characterization, E01 - Replacement, T01 - Initial Final Release Medium Codes: B0019, B0020, B0023, B0031 l I l Download # - Survey User ID M2350 S/N Detector ! Station Id S/N l 213-3 VMB6153/95359 95359 PR092525 232-3 AOK298?/98620 98620 PR095083 233-3 PDG1526/95361 95361 PR092644' / 281-3 DAB 9854/126198 126198 PR128913 476-3 BJB1396/126175 126175 PR128925 634-1 RLN4080/98620 98620 PR095101 674-1 KDE9135/117578 117578 PR119445 1276-1 DAB 9854/80498 80498 PR124110 l Program Version: V2.12.1.a.9.13.96 Report Printed At: 08:51:35 AM on 09/24/96 Total Pages: 8 Page 8:TSABS:V2.12.1.a.9.13.% Page 18 l
Statistical Summary Removable Surface Activity - Beta Survey g
~~,.,.=,._~~
Location Code: D8200TZZZZDZ Survey Reasons: T01 - Initial Final Release, C01 - Characterization Medium Codes: B0019, B0020, B0031 Net dpm/100 cm2 l Upper Confidence Limit (UCL) 4.4 l l Mean 2.4 l l Maximum 33.3 l l Minimum -6.9 l , l Standard Deviation 7.2 l l Minimum Detectable Activity 24.9 l l Critical Level 9.3 l l Samples Reported 36l l Samples Prescribed 36l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 250.0 dpm/100 cm2 YES l Passed l Percent of Samples > 250.0 dpm/100 cm2 0.0 l Passed (3) l Number of Samples > 500.0 dpm/100 cm2 0 l Passed (4) l UCL of Mean less than or equal 1,000.0 dpm/100 cm2 YES l Passed (3) 10% Test (4) Single Measurement Test G Page 1:RSABS:V2.12.1.a.9.13.96 PaggIL,,
Plant Systems Corrected Field Activity Values -- Removable Surface Activity - Beta Survey EE$$ ! is m.= Location Code: D8200TZZZZDZ Comments: Activity (net), MDA, and CL reponed dpm/100 cm2 Underlined values exceed the entical level. Bold values exceed 250.0 dpm/100 cm2 Italic values exceed 1,000.0 dpm/100 cm2 , Medium RC# Location ID - MDA Critical Activity Reason Code Location # Level Code B0019 26.07234 2-1 19.0 6.4 -0.9 C01 26.07235 2-2 19 0 6.4 -3.2 26.07236 2-3 19.0 6.4 1.4 26.23534 3-1 22.2 8.0 4.2 T01 26.23535 3-2 22.2 8.0 -2.8 26.23536 3-3 22.2 8.0 4.2 26.23537 3-4 22.2 8.0 -0.5 26.23538 3-5 22.2 8.0 -0.5 26.23539 3-6 22.2 8.0 1.9 26.31819 4-1 24.9 9.3 -2.3 26.31820 4-2 24.9 9.3 -4.6
/ ') 26.31821 43 24.9 9.3 0.0 26.31822 4-4 24.9 9.3 0.0 26.31823 4-5 24.9 9.3 -4.6 26.31824 4-6 24.9 9.3 -6.9 26.22461 5-1 20.7 7.2 2.8 26.22462 5-2 20.7 7.2 0.5 .
~~26.22463 5-3 20.7 7.2 -4.2 l 26.22464 54 20.7 7.2 7.4 l~~
~~. 26.22465 5-5 20.7 7.2 -1.9 l 26.22466 5-6 20.7 7.2 5.1 1~~
B0020 26.23052 9-1 23.6 8.7 3.2 26.28049 10-1 23.6 8.7 0.9 26.28047 11-1 23.6 8.7 7.9 26.28048 12-1 23.6 8.7 1.4 Page 2:RSABS:V2.12.1.a 9.13.96 Page 20
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l Plant Systems Corrected Field Activity Values Removable Surface Activity - Beta Survey , yea ,.u. a Location Code: D8200TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 250.0 dpm/100 cm2 Italic values exceed 1,000.0 dpm/100 cm2 Medium RC# Location ID - MDA Critical Activity Reason Code Location # Level Code B0031 26.05649 1-1 20.7 7.2 9.7 C01 26.05650 1-2 20.7 7.2 0.5 26.05651 1-3 20.7 7.2 2.8 26.05652 1-4 20.7 7.2 -1.9 26.05653 1-5 20.7 7.2 5.1 26.23050 6-1 23.6 8.7 12.5 T01 26.23051 6-2 23.6 8.7 0.9 26.23048 7-1 23.6 8.7 10.2 26.23049 7-2 23.6 8.7 -3.7 26.23053 8-1 23.6 8.7 33.3 26.23054 8-2 23.6 8.7 12.5 O O Page 3:RSABS:V2.12.1.a.9.13.96 Page 21
e Graph of Activity versus location Series Removable Surface Activity - Beta Survey
-d@@ ,=.=.ya Location Code: D8200TZZZZDZ Survey Reasons: T01 - Initial Final Release, C01 - Characterization 1
Medium Codes: B0019, B0020, B0031 , Guideline Value 1000.0 dpm/100 cm8 275 4 225-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - a 175- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8 8 125-- - - - - -------- ----------------------------------------------------- j s i
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(' ( Page 4:RSABS:V2.12.1.a.9.13.96 GRFSL7L8.FJL Page 22
Laboratory Equipment Used g Removable Surface Activity - Beta Survey e= d Location Code: D8200TZZZZDZ Survey Reasons: T01 - Initial Final Release, C01 - Characterization Medium Codes: B0019, B0020, B0031 Location Range Survey User ID Laboratory Serial Equipment Number 3-1 to 3-6 DAB 9854 LB-5100W SN5100W 1-1 to 1-5 ELLIS LB-5100W SN5100W 2-1 to 2-3 KDE9135 LB-5100W SN5100W 4-1 to 6-1 to 4-6 6-2 LCF0451 PDG1526 LB-5100W LB-5100W SN5100W SN5100W gi 7-1 to 7-2 PDG1526 LB-5100W SN5100W 8-1 to 8-2 PDG1526 LB-5100W SN5100W 9-1 PDG1526 LB-5100W SN5100W 10-1 PDG1526 LB-5100W SN5100W 11-1 PDG1526 LB-5100W SN5100W 12-1 PDG1526 LB-5100W SN5100W 5-1 to 5-6 VMB6153 LB-5100W SN5100W , I l 1 Program Version: V2.12.1.a.9.13.96 Report Printed At: 02:27:45 PM on 09/24/96 Total Pages: 5 l Page 5:RSABS:V2.12.1.a.9.13.96 Page 23 FSR LSYS.FS
Scientific Ecology Group, Inc. gg Radiological Engineering & Decommissioning Services ~~~ k- Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record Contents Survey Area Survey Area ID: Survey Area Description Pages D8400 Auxiliary Boiler and Heating System 2-3 Survey Unit (s) Location Code Survey Unit Description Pages D8400 ZZZZZ DZT01 Auxiliary Boiler and Heating System 4-26 D8 ZZ ZD 01 D8400 ZZZZZ DZG01 Prepared By: dr / /O-3 5 - fd SEG Radjpididt!' Engineer Date Reviewed By: A / I'/t'/% SEG Pnse6t Radiation Protection Manager Date Approved By: I_ / ,s;4 M r go,ts r- / <e/u /94 PSCO Radiation Protection Manager Date O Page1
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Scientific Ecology Group, Inc. g Radiological Engineering & Decommissioning Services ~ ~ ~ Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record - Survey Area Survey Area / Package ID: D8400 Survey Area
~~Description:~~
~~Auxiliary Boiler and Heating System, System #84 Survey Package~~
~~Description:~~
Auxiliary Boiler and Heating System The Auxiliary Boiler and Heating system was designed to provide steam to the equipment and systems served by the 150 psig steam header during those periods when steam from the < cold reheat header and by-pass field flash tank was either unavailable or insufficient. The auxiliary boiler was also used for building heating. The Auxiliary Boiler and Heating system was surveyed as an Unaffected Survey Unit. Characterization survey results which were reviewed and found to qualify as final survey data are included in this package. Measurement locations are indicated on the attached drawing and location table.
~~' Survey Area Operational History:~~
The Auxiliary Boiler and Heating system was in operation prior to plant shutdown August 18, 1989. The Auxiliary Boiler and Heating system will be used for repower. The Auxiliary Boiler and Heating system had no history of radioactive contamination events. Survey Area Decommissioning and Remediation Activities: No radiological decommissioning or remediation was performed for System 84. Isolation and Control Measures: Level 2 Controls When appropriate, disassembled components were reassembled following survey. If reassembly was delayed or not performed, component openings were sealed with tape or other appropriate material to maintain isolation control. O Page 2
Survey Area
~~Conclusions:~~
The results of total and removable surface activity measurements collected within this survey O area meet the criteria for release for unrestricted use. The level of removable H-3 measured was below the detection MDA. Sediment sample results did not identify any licensed radionuclides except for one sample scraped from a 100 cm' area which indicated a very low level of Cs-137 well below 1250 dpm. Survey Area
~~References:~~
1. Initial Radiological Site Characterization Report Volumes 1,2, and 14.2.

2. System Description SD Auxiliary Boiler System

3. PI-84-1 and PI-84-5

4. Discussion with various PSCo and Westinghouse personnel.
O. l l l O Page 3 l l
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Scientific Ecology Group, Inc. gg Radiological Engineering & Decommissioning Services ~~~ Fort St. Vrain Nuclear Generating Station Decommissioning Project Release Record - Survey Unit i l Survey Package ID: D8400 Location Code: D8400 ZZZZZ DZ 1 Group ID Survey Area Number Surface Category Survey Unit Classification D 8400 System Internals DZ (Unaffected) 1 Survey Reason: T01 - Initial Final Release C01 - Characterization E01 - Replacement G01 - Investigation Survey Unit
~~Description:~~
System 84, Auxiliary Boiler and Heating System O Survey Design: Measurement Type No. of Measurements Description Beta Scan N/A Scanned vicinity of each total surface activity location where accessible. No areas of elevated licensed activity were l identified. l Total Surface 41 Collected at designated locations from 14 Activity plant system components. Thirteen characterization measurements from survey locations 10,20,30 and 40, were included. J 2 py Smears Collected at designated locations from 14 3 39 plant system components. Thirteen characterization measurements from survey locations 10,20,30 and 40, were included. Special Samples 1 Removable tritium surface activity sample from survey location 7. 2 Sediment sr.mples from survey location 7. k Page 4
1 i Survey Unit Investigations: Investigation No.1 O Two elevated readings were detected during the initial survey of location 7 - the Outside Auxiliary Boiler Mud Drum (S40lS), in the Kelly Building. The readings were 5,063.3 and 5,164.6 dpm/100 cm2 (download report 881-1). Because this system had no history of radioactive contamination, natu al radioactivity was suspected. An investigation survey was performed at location 7 in accordance with FSV-FRS-TBD-208, Revision 0. The location was scanned and the area of highest elevated activity identified. At the area of highest elevated activity, a total surface activity measurement was taken and a sediment / scale sample was collected and submitted to radiochemistry for gamma spectroscopy analysis. A second total activity measurement was obtained following the collection of the sediment sample in order to equate the gamma spec analysis results to the total surface activity measurement results. Very low levels of licensed material were identified in the sediment / scale sample for location
7. The nuclide identified was Cs-137 at a total of 3.0 pCi (i.e.,6.7 dpm) from the scraping sample taken over approximately 100 cm2 . The predominate nuclides identified during the count of the sediment sample were naturally occurring (e.g., Th-234, Pb-212, etc.). A conservative estimate of licensed activity at the location was determined by adding the MDA values of Co-60 and Eu-152 (which together with Cs-137 contribute approximately 97% of the licensed activity at FSV) to the detected Cs-137 and correcting the result for the fraction of the elevated reading removed by the sediment sample. From the conservative estimate of g
licensed activity, a licensed activity ratio was determined by dividing the licensed activity by the initial elevated reading. The conservative licensed activity fraction was calculated as 0.0175. The licensed activity fraction was used to calculate a naturally occurring radioactivity background for the elevated measurements taken at survey location 7. When naturally occurring radioactivity was subtracted, the range of licensed activity (as conservatively estimated) was about 26 to 115 dpm/100 cm2 , O Page 5
i i Investigation No. 2 'O For survey location 2, the measured MDA of 1,375 dpm/100 cm2, was greater than the , 4 target MDA of 1,250 dpm/100 cm2 for an unaffected system (Download report 400-3). This location was the Auxiliary Boiler FW Pump (P840lS). The problem was attributed to , insufficient count time. { j A replacement survey at location 2 was performed with double the count time of the initial l l survey. ; . i 2
~~- The replacement survey MDA was below 1,250 dpm/100 cm . The measurement results !~~
~~obtained from the replacement survey replaced the results of the initial final survey.~~
~
i
~~Investigation No. 3 i~~
~ The characterization survey instructions for location 10 and 20, prescribed 5 total surface l activity measurements and one background measurement collected from the area of the first i i total surface activity measurement for each location. The background measurement collected ; at each location was indicative of the internal surface area at the location and was to be ; applied to all measurements at the location. The current database in use. however, requires a background measurement to be assigned to each total surface activity measurement. Therefore, a database correction was made to assign the background value to each total surface activity measurement. e T i ? 1 J 1 l l 2 O b Page 6
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~~Scientific Ecology Group, Inc. Radiological Engineering & Decommissioning Services gg~~
~~~~~~~
Fort St. Vrain Nuclear Generating Station Decommissioning Project Survey Location Summary Survey Measurements Description Imation Location Collected Number r 1 2 - TSA Auxiliary Boiler FW pump Turbine Building Level 5 1 - RSA (P840lS suction line,4" Auxiliary Boiler Room South L3178-D21 2 1 - TSA Auxiliary Boiler FW pump Turbine Building Level 5 1 - RSA (P840lS) discharge line,2.5" Auxiliary Boiler Room South K8401 3 3 - TSA Inside Auxiliary Boiler Yard, Southwest corner of 3 - RSA Blowdown Tank (T-8406) Turbine Building vent 4 3 - TSA Outside Auxiliary Boiler Yard, South side of Turbine a i 3 - RSA Blowdown Tank (T-8407) Building vent 5 4 - TSA Deacrator E-8403 South end of Kelly Building 4 - RSA #29 6 2 - TSA 2" line downstream of Northeast corner of Kelly 2-RSA V841025 Building #29 7 6 - TSA Outside Auxiliary Boiler Kelly Building #29 5 - RSA (S-40lS) Mud Drum 1 - II-3 2 - Sediment 8 5 - TSA Outside Auxiliary Boiler Kelly Building #29 5 - RS A (S-40lS) Steam Drum 9 1 - TS A Deacrator Cond. Booster Turbine Building 12 Vel 6 1-RSA Pump (P8406) discharge pipe Southwest C0020 10 5 - TSA Auxiliary Boiler S-8401, Mud Turbine Building Izvel 5 5 - RSA Drum Auxiliary Boiler Room
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Survey Measurements Description Location Location Collected Number 11 1 - TS A Deaerator Cond. Booster Turbine Building Level 6 1 - RSA Pump (P8406S) discharge Southwest C0020 pipe 20 5 - TS A Auxiliary Boiler S-8401, Turbine Building Level 5 5 - RS A Steam Drum Auxiliary Boiler Room 30 2 - TSA F8402X, Fuel Oil Feed Pump Turbine Building Level 5 2 - RSA Discharge Strainer Auxiliary Boiler Room 40 1 - TSA Pipe Survey (3/4") upstream Kelly Building #29 1-RSA of removed LCV-8401 O l l l l O Page 9
l (' ,\ Scientific Ecology Group, Inc. g Radiological Engineering & Decommissioning Services ~~~ V Fort St. Vrain Nuclear Generating Station Decommissioning Project l Special Samples I Location Code: D8400 ZZZZZ DZT01 Comments: H-3 activity reported in Net dpm/100 cm2 l Sediment activity reported in total pCi l Underlined values exceed the critical level Bold values exceed 250 dpm/100 cm2 Italic values exceed 1,000 dpm/100 cm2 Tritium Removable Activity Samples Location Type of Critical MDA Activity Number Sample Level 7-1 H-3 110.0 225.1 16.3 O Sediment Samples Location Licensed Critical MDA Activity Number Nuclides Level 7-l* 2"Cs 21.1 47.9 Not Identified "Co 20.2 48.4 Not Identified n2Eu 43.5 94.1 Not Identified 7-l** "Cs 1.61 3.30 3.00 i "Co 2.79 5.70 Not Identified n2Eu 3.71 7.50 Not Identified
~~Sediment sample collected over large area in mud drum on January 8,1996~~
** Sediment sample collected over 100 cm2 on June 26,1996 S }
Page 10
Compilation of Statistical Summaries
. Total Surface Activity - Beta Survey h35$. = = =
Removable Surface Activity - Beta Survey Location Code: D8400TZZZZDZ Medium Codes: B0019, B0020, B0023, B0037, B1045, B1046, B1047, B1048 Comments: Tota? Surface Activity (TSA) reported in Net dpm/100 cm2 Rercuwable Surface Activity (RSA) reported in Net dpm/100 cm2 TSA RSA Upper Confidence Limit (UCL) Mean 13.7
~~-74.1 2.6 0.9 g~~
Maximum 699.4 33.5 Minimum -929.6 -7.2 Standard Deviation 333.7 6.5 Minimum Detectable Activity 1,061.4 25.5 Critical Level 520.1 9.6 Samples Reported 41 39 l Samples Prescribed 41 39 l l O Page 1: ERGS:V2.15.1.a.10.1.96 Page 11 , l 1
l l Statistical Summary - Total Surface Activity - Beta Survey , yg__._, Location Code: D8400TZZZZDZ Survey Reasons: T01 - Initial Final Release E01 - Replacement, G01 - Investigation, C01 - Characterization Medium Codes: B0019, B0020, B0023, B0037, B1045, B1046, B1047, B1048 Net dpm/100 cm2 l Upper Confidence Limit (UCL) 13.7 l l l Mean -74.1 l l Maximum 699.4 l l Minimum -929.6 l l Standard Deviation 333.7 l l Minimum Detectable Activity 1,061.4 l l Critical Level 520.1 l l Samples Reported 41l l Samples Prescribed 41l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 1,250.0 dpm/100 cm2 YES l Passed , l Percent of Samples > 1,250.0 dpm/100 cm2 0.0 l Passed (3) l Number of Samples > 2,500.0 dpm/100 cm2 0 l Passed (4) l UCL of Mean less than or equal 5,000.0 dpm/100 cm2 YES l Passed (3) 10% Test (4) Single Measurement Test O ' Page 1:TSABS:V2.15.1.a.10.1.%
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Plant Systems Corrected Field Activity Values Total Surface Activity - Beta Survey : em: .,s Location Code: D8400TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bc!d values exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 Count time reponed in seconds. Medium Download # Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0019 881-1 7-3 15 820.4 382.8 __648.1 T01 7-4 802.8 374.0 81.0 8-1 727.8 336.5 40.5 8-2 721.2 333.2 506.3 8-3 854.5 399.8 -121.5 8-4 760.1 352.6 303.8 8-5 700.9 323.0 101.3 B0020 481 3 5-1 757.5 357.2 -191.0 5-2 730.1 343.5 95.5 5-3 662.9 309.9 -111.4 5-4 738.0 347.4 -222.9 503-3 6-1 180 1.020.9 499.2 175.0 6-2 1.025.4 501.4 -533.3 638-1 30-1 240 877.0 420.6 489.2 C01 30-2 816.3 390.2 542.0 B0023 913-1 11 600 588.2 286.7 -126.1 T01 1-2 646.0 315.6 -482.6 1998-3 2-1 480 1,061.4 520.1 -351.6 E01 1129-1 3-1 600 666.4 325.3 -81.1 T01 3-2 634.9 309.6 -75.3 3-3 631.4 307.8 -98.5 4-1 722.5 353.4 -52.1 4-2 717.4 350.8 -254.8 4-3 684.0 334.1 144.8 895 1 9-1 30 1.030.5 477.1 -929.6 907-1 11 1 988.0 450.3 -354.8 632 1 40-1 60 777.4 366.6 -359.5 C01 O Page 2:TSABS:V2.15.1.a.10.1.96 Page 13
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~~N Plant Systems Corrected Field Activity Values Total Surface Activity - Beta Survey M5~~
~~- . . . - - - l Location Code: D8400TZZZZDZ i-Comments: Activity (net), MDA, and CL reported dpm/100 cm'.~~
Underimed values exceed the critical level. Bold values exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 Count time reported in seconds. ~ Medium Download # Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B0037 637-1 10-1 15 638.6 292.0 -306.9 C01 10-2 638.6 2925 ..,Q9fL4 10-3 638.6 FI2.0 _ '1L1 10-4 638.6 't92.0 - M T.0 1 10-5 638.6 292.0 56.3 20-1 638.6 292.0 -266.7 4 20-2 638.6 292.0 -327.0 l 20-3 638.6 292.0 -367.3 20-4 638.6 292.0 -367.3 20-5 638.6 292.0 -186.2 B1045 881-1 71 903.0 424.0 88.6 T01 O i B1046 72 860.0 402.6 25.9 1 4 B1047 7-5 908.2 426.7 92.4 Page 3:TSABS:V2.15.1.a.10.1.% Page 14 r..n-..
Plant Systems Corrected Field Activity Values Total Surface Activity - Beta Survey
~~-f$dId5 g.2..=,ya Location Code: D8400TZZZZDZ Comments: Activity (net), MDA, and CL reponed dpm/100 cm2 Underlined values exceed the entical level.~~
Bold values exceed 1,250.0 dpm/100 cm2 Italic values exceed 5,000.0 dpm/100 cm2 Count time reponed in seconds. Medium Download # . Location ID - Count MDA Critical Activity Reason Code Station # Location # Time Level Code B1048 795-3 7-6 15 825.1 384.7 115 2 G01 0 O1 Page 4:TSABS:V2.15.1.a.10.1.96 Page 15 r.. n-. ..
I i Graph of Activity versus Location Series O Total Surface Activity - Beta Survey fiM i:a.ya Location Code: D8400TZZZZDZ Survey Reasons: T01 - Initial Final Release, E01 - Replacement, G01 - Investigation, C01 - Characterization Medium Codes: B0019, B0020, B0023, B0037, B1045, B1046, B1047, B1048 Average Guideline Value 5000.0 dpm/100 cm' 2500 2000- - - - - - ------------- ---------------------------------------------- 1500-------- --- - - --------------------- ----- ------------ ---------- O . O --M----------------p ----------------- -------- ,---- - ------ g 1000-
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~~-- Critical level -*- MDA Average Guideline Value (off-scale) -.- Activity~~
~~O Page 5:TSABS:V2.15.1.a.10.1.96 GRFSL7L8.FSL Page 16~~
Background Correction Values Total Surface Activity - Beta Survey [ ==EM gy=_ a Location Code: D8400TZZZZDZ Comments: Field Background (Bkg) reponed in cpm / detector area. Medium Bkg reponed in dpm/100 cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0019 881-1 7-3 02202 15 TM001 264.0 0.0 T01 7-4 252.0 8-1 204.0 8-2 200.0 8-3 288.0 8-4 224.0 8-5 188.0 B0020 481-3 5-1 02200 372.0 5-2 344.0 5-3 280.0 5-4 352.0 503-3 6-1 02310 180 221.0 6-2 223.0 638-1 30-1 02000 240 46.8 C01 30-2 40.2 B0023 l 913-1 1-1 02101 600 50.5 T01 1-2 61.2 1998-3 2-1 02311 480 TS001 102.4 E01 1129-1 3-1 02101 600 TM001 58.3 T01 3-2 52.8 3-3 52.2 4-1 68.8 4-2 67.8 4-3 61.5 895-1 9-1 02301 30 TS001 106.0 907-1 11-1 72.0 632-1 40-1 02300 60 93.0 C01 l l O Page 6:TSABS:V2.15.1.a.10.1.96 l Page 17
Background Correction Values Total Surface Activity - Beta Survey - - . - - - Location Code: D8400TZZZZDZ Comments: Field Background (Bkg) reported in epm / detector area. Medium Bkg reported in dpm/100 cm2 Count time reponed in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B0037 637-1 10-1 02202 60 TS001 249.0 0.0 C01 10-2 249.0 10-3 249.0 l 10-4 249.0 , 10-5 249.0 20-1 249.0 20-2 249.0 20-3 249.0 20-4 249.0 20-5 249.0 B1045 881-1 7-1 15 TM001 324.0 4,974.7 T01 i B1046 7-2 292.0 1,452.6 B1047 7-5 328.0 5,072.2 (3 V Page 7:TSABS:V2.15.1.a.10.1.96 Page 18
Background Correction Values
~~-ISESM .. J -~~
Total Surface Activity - Beta Survey ! l Location Code: D8400TZZZZDZ i i Comments: Field Background (Bkg) reported in epm / detector area. Medium Big reported in dpm/ LOO cm2 Count time reported in seconds. Medium Code left justified under Download #-Station # column. Download # - Location ID - Detector Count Bkg Field Medium Reason Station # Location # Type Time Sub Bkg Bkg Code B1048 795-3 7-6 02202 15 TM001 260.0 6,448.9 G01 O O Page 8:TSABS:V2.15.1.a.10.1.96 Page 19
Summary of Efficiency Values Total Surface Activity - Beta Survey g
~~==,,,,,,.,.~~
Location Code: D8400TZZZZDZ Survey Reasons: T01 - Initial Final Release, E01 - Replacement, G01 - Investigation, C01 - Characterization Comments: 1, Detector Detector Download # Efficiency Model Serial Number -Station # LMI 43-68B PR119340 481-3 0.201 LMI 43-98/200 PR117963 503-3 0.040 , LMI 43-94/075 PR124110 632-1 0.068 1 LMI 43-68/S PR095535 637-1 0.159 j LMI 44-40B PR094981 638-1 0.122 LMI 43-68/S PR119340 795-3 0.156 4 LMI 43-68/S PR095083 881-1 0.158 LMI 43-94P100 PR124115 895-1 0.071 1 LMI 43-94P100 PR124110 907-1 0.062 SEG SP-113-3M PR024351 913-1 0.094 t/ SEG SP-113-3M PR024351 1129-1 0.089 LMI 43-98/300 PR117961 1998-3 0.016 4
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C Page 9:TSABS:V2.15.1.a.10.1.96 Page 20
Survey Detection Equipment Used Total Surface Activity - Beta Survey i.caya . Location Code: D8400TZZZZDZ Survey Reasons: T01 - Initial Final Release, E01 - Replacement, G01 - Investigation, C01 - Characterization Medium Codes: B0019, B0020, B0023, B0037, B1045, B1046, B1047, B1048 Download # - Survey User ID M2350 S/N Detector Station Id S/N 481-3 RLN4080/117566 117566 PR119340 503-3 AOK2982/126182 - 126182 PR117963 632-1 JPC7742/98626 98626 PR124110 637-1 JPC7742/98643 98643 PR095535 g 638-1 KDE9135/98642 98642 PR094981 795-3 DAB 9854/117566 117566 PR119340 881-1 DTS/6208 98620 PR095083 895-1 JMS1149/117578 117578 PR124115 907-1 DLB6373/117566 117566 PR124110 913-1 RLN4080/98642 98642 PR024351 1129-1 DTS6208/126192 126192 PR024351 1998-3 DAB 9854/80502 80502 PR117961 Program Version: V2.15.1.a.10.1.96 Report Printed At: 12:24:47 PM on 10/05/96 g Total Pages: 10 Page 10:TSABS:V2.15.1.a.10.1.96 Page 21 F$R_SYS FSL
Statistical Summary (O ' / Removable Surface Activity - Beta Survey ,g-E_SS
~~=,__ ,~~
Location Code: D8400TZZZZDZ i Survey Reasons: C01 - Characterization, T01 - Initial Final Release Medium Codes: B0019, B0020, B0023, B0037 s Net dpm/100 cm2 l Upper Confidence Limit (UCL) 2.6 l l Mean ,, 0,9 l l Maximum 33.5 l l Minimum -7.2 l . l Standard Deviation 6.5 l l r) s) l Minimum Detectable Activity 25.5 l l Critical Level [ 9.6 l l Samples Reported 39l l j Samples Prescribed 39l l Tests Performed l Samples Reported greater than or equal to Samples Prescribed YES l Passed l MDA < 250.0 dpm/100 cm2 YES l Passed , l Percent of Samples > 250.0 dpm/100 cm2 0.0 l Passed (3) l l Number of Samples > 500.0 dpm/100 cm2 0 l Passed (4) l l UCL of Mean less than or equal 1,000.0 dpm/100 cm2 YES l Passed (3) 10% Test I (4) Single Measurement Test
~~/'N v)~~
( Page 1:RSABS:V2.15.1.a.10.1.96 1 i "_ e 22 7, STAT.FSL
~ l 1 I Plant Systems Corrected Field Activity Values - l g.B=urii Removable Surface Activity - Beta Survey . d-Location Code: D8400TZZZZDZ Comments: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 250.0 dpm/100 cm2 Italic values exceed 1,000.0 dpm/100 cm2 Medium RC# Location ID - MDA Critical Activity Reason Code Location # Level Code B0019 26.11479 7-1 25.2 9.5 4.4 T01 26.11480 7-2 25.2 9.5 -0.2 26.11481 7-3 25.2 9.5 -0.2 26.11482 7-4 25.2 95 4.4 26.11483 7-5 25.2 9.5 6.7 26.11484 8-1 25.2 9.5 -2.5 26.11485 8-2 25.2 9.5 -2.5 26.11486 8-3 25.2 9.5 -2.5 26.11487 8-4 25.2 9.5 -0.2 26.11488 8-5 25.2 9.5 -2.5 B0020 26.32157 5-1 24.3 9.0 0.5 26.32158 5-2 24.3 9.0 2.8 26.32159 5-3 24.3 9.0 0.5 26.32160 5-4 24.3 9.0 -1.9 26.32363 6-1 25.5 9.6 -5.1 26.32364 6-2 25.5 9.6 6.5 B0023 26.12087 11 23.3 8.5 1.2 26.28046 2-1 23.6 8.7 -3.7 26.16866 31 21.5 -2.3 26.16867 3-2 21.5 2.3 26.16868 3-3 21.5 4.6 -2.3 26.16869 4-1 21.5 7.6 2.3 26.16870 42 21.5 7.6 -2.3 26.16871 4-3 21.5 7.6 0.0 26.11574 9-1 25.2 9.5 -7.2 26.11732 11 1 23.3 8.5 33.5 B0037 26.05654 10-1 22.6 8.2 -3.0 C01 26.05655 10-2 22.6 8.2 -0.7 26.05656 10-3 22.6 8.2 -3.0 26.05657 10-4 22.6 8.2 3.9 26.05658 10-5 22.6 8.2 10.9 26.05659 20-1 22.6 8.2 -0.7 26.05660 20-2 22.6 8.2 6.2 26.05661 20-3 22.6 8.2 -5.3 26.05662 20-4 22.6 8.2 -0.7 26.05663 20-5 22.6 8.2 -3.0 Page 2:RSABS:V2.15.1.a.10.1.96 Page 23
~~. .. no . . ..~~
p Plant Systems Corrected Field Activity Values O Removable Surface Activity - Beta Survey i=26 Location Code: D8400TZZZZDZ Cor. its: Activity (net), MDA, and CL reported dpm/100 cm2 Underlined values exceed the critical level. Bold values exceed 250.0 dpm/100 cm2 Italic values exceed 1,000.0 dpm/100 cm2 Medium RC# Location ID - MDA Critical Activity Reason Code Location # Level Code B0037 26.05647 30-1 20.7 7.2 -1.9 C01 26.05648 30-2 20.7 7.2 2.8 26.05664 40-1 22.6 8.2 -0.7 (3 V 1 J d Page 3:RSABS:V2.15.1.a.10.1.96 Page 24
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l l l I Graph of Activity versus location Series '== Removable Surface Activity - Beta Survey 35 n= m Location Code: D8400TZZZZDZ Survey Reasons: C01 - Characterization, T01 - Initial Final Release Medium Codes: B0019, B0020, B0023, B0037 Guideline Value 1000.0 dpm/100 cm 2 275 225 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -------------------- 175 - -------------------------------------------------------------------. t N l E v 8
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iC 75- ------------------- ---- ------------------------------------------ o 254.--. g g q_, g 3 - .-. ~ . === ===-*-,www a w agg n---,_-._. _ = = = --- g y------ = ,_,,-,, ,.e - ,
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i-1 l it' 3-2L3 41 4-2 ' 6-1 L3'! 41 t-1 h3 14; 6-2 ll 44l 61' 10-2' : 10 4 11-1 20-2; 20 ' ;4341 40 1 2-1 4-3 6-2 54 42 7-2 7-4 6-1 6-3 6-6 101 143 10-5 20-1 20-3 246 342 Location Series '
-- - Critical level -- - MDA Guideline Value (off-scale) -.- Activity Page 4:RSABS:V2.15.1.a.10.1.96 Page 25 GRFSL7L8.FSL
Laboratory Equipment Used Removable Surface Activity - Beta Survey g gy=.y.2 Location Code: D8400TZZZZDZ Survey Reasons: C01 - Characterization, T01 - Initial Final Release Medium Codes: B0019, B0020, B0023, B0037 Location Range Survey User ID Laboratory Serial Equipment Number 6-1 to 6-2 AOK2982 LB-5100W SN5100W 10-1 to 10-5 AOK2982 LB-5100W SN5100W 20-1 to 20-5 AOK2982 LB-5100W SN5100W
~~~~'~~
40-1 AOK2982 LB-5100W SN5100W (t)' 2-1 BJB1396 LB-5100W SN5100W 5-1 to 5-4 BJB1396 LB-5100W SN5100W 3-1 to 3-3 JDT2759 LB-5100W SN5100W 4-1 to 4-3 JDT2759 LB-5100W SN5100W 11-1 JDT2759 LB-5100W SN5100W 30-1 to 30-2 KDE9135 LB-5100W SN5100W 1-1 RLN4080 LB-5100W SN5100W 7-1 to 7-5 RLN4080 LB-5100W SN5100W 8-1 to 8-5 RLN4080 LB-5100W SN5100W 9-1 RLN4080 SN5100W LB-5100W i Program Version: V2.15.1.a.10.1.96 ('N Report Printed At: 12:02:47 PM on 10/05/96 Total Pages: 5 Page 5:RSABS:V2.15.1.a.10.1.96 Page 26 FSR_LSYS.FS
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