ML20028G020

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TMI-2 Groundwater Monitoring Program, for Period Ending 821220
ML20028G020
Person / Time
Site: Crane Constellation icon.png
Issue date: 02/01/1983
From: Kanga B
GENERAL PUBLIC UTILITIES CORP.
To: Barrett L
Office of Nuclear Reactor Regulation
References
4410-83-L-0017, 4410-83-L-17, NUDOCS 8302070326
Download: ML20028G020 (38)
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Text

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= n ze8s 48o s Middletown. Pennsylvania 17057 717 944-7621 TELEX 84-2386 Writer"s Direct Dial Number: February 1, 1983 4410-83-L-0017 TMI Program Office Attn: Mr. L. H. Barrett, Deputy Program Director US Nuclear Regulatory Cmmission C/0 Three Mile Island Nuclear Station Middletown, PA 17057-0191

Dear Sir:

Three Mile Island Nuclear Station, Unit 2 (IMI-2) Operating License No. DPR-73 Docket No. 50-320 Groundwater Monitoring Program This is the periodic report presenting results of the program to detect radioactive water leakage to the groundwater of IMI-2. Groundwater Monitoring The following groundwater nonitoring data is attached: 1. Individual computer graphs (Figure 1) of tritium concentrations for each monitoring station, observation station, and the East Dike Catchy y Basin (EDCB) up to and including Novernber 2,1982. MS-1, MS-2, MS-3,, ci OS 10, OS-16, and OS-17 include data through Decmber 20, 1982. The g MS-4 tritium concentrations from Septaber 13, 1982, and October 4, 1982, have been received and are included in this report. Qg @0 n 2. Individual computer graphs (Figure 2) of water levels within the u + monitoring stations up to and including December 13, 1982. w O u 3. A graph (Figure 3) indicating ga:mn scan data frca Monitoring Station 9 MS-2 sample analysis. 4. Composite Sr-89 and Sr-90 groundwater results for the third quarter (Tables 1 and 2). 5. A composite drawing showing all monitoring locations with a graph of the tritium concentrations reported in each station. 8302070326 830201 [8A // PDR ADOCK 05000320 I af. R PDR X f)(dW} GPU Nuclear Corporation is a subsidiary of the General Pot *c Utihties Corporation

  • Mr. I. H. Barrett 4410-83-L-0017 l

ne latest groundwater results frm the 'IMI nmitoring program shw all tritiun l concentrations to be within the range of previously reported values. i Gamm results for Novmber 2,1982 (from the off-site laboratory), were IlD for MS-6, OS-10, OS-13B, OS-14, and the EDCB. The naturally occurring isotope, Ra-226, was detected in MS-5, MS-7, and MS-8 samples. Results for MS-1, MS-2, MS-3, MS-4, OS-16, and OS-17 have not been received to date. Gamm results for MS-4 from October 4,1982, shw only naturally _occming Ra-226 and K-40 present. Ca:mn results (frm Unit 2 Chanistry) for MS-1, MS-3, OS-10, OS-16, and OS-17 were 11D for the last week of Novmber and the first three weeks of Deceber,1982. On December 9,1982, Cs-137 (concentration of 27 + 11 pCi/1) was detected in an MS-2 sample. No cesiun was detected on Novmber 30, Deceber 13, or Decanber 20, 1982, for MS-2. Third quarter strontium results for the monitoring and observation stations are also included in the report. A positive Sr-89 concentration of.370 i.350 pCi/1 was reported for MS-6. Due to the uncertainty of measurements which are near the 11D, the positive Sr-89 values are considered to be the result of statistical distribution and not the presence of Sr-89. Tnird quarter Sr-89 results for MS-2 and the EDCB have not been received as well as the second quarter strontium reanalysis results of MS-8. These results will be provided in a future report. The Sr-90 results for the third quarter show several positive values (MS-3, MS-4, OS-10, OS-16, and OS-17). W e positive numbers were very close to, or below, the calculated LLD values. Due to the uncertainty of measuranents which are near the LLD, the positive Sr-90 values are considered to be the result of statistical distribution and not the presence of Sr-90. Since the implementation of the Groundwater Monitoring Program in early 1980, the detection of radionuclides in groundwater sanples has been limited to the Unit 2 power block area. I Elevated tritium concentrations in certain groundwater samples from the Unit 2 power block area have been attributed to past leaks of the Unit 2 BWST. Tritium concentrations in the samples from stations in the BWSr vicinity have been trending downward, indicating no leakage has occurred fran the tank since January,1982. The preponderance of data clearly supports the contention that leaks from the BWST were responsible for elevated radionuclide concentrations in the nonitoring and observation stations (MS and OS respectively). 'Ihe occasional detection of cesium in MS-2 samples over the past two years has been attributed solely to the BWST (traced by the isotopic ratios of Cs-137 to Cs-134). The sporadic presence of Cs-137 in MS-2 daring 1982 is likely the result of the Cs-137 being concentrated in the sediments present in the monitoring station. If you have any questions, please contact Mr. J. E. Larson of my staff. Sincerely, / hI $2 % B. K. Kanga y Director,'IMI' BKK/SWS/jep Attachnent CC: Dr. B. J. Snyder, Program Director 'IMI Program Office

LIST OF ATTACHMENTS Figures Figure 1 Graphs of Tritiun Concentrations of Monitoring Stations and East Dike Catch Basin Sarnples Versus Time Figure 2 Graphs of Water Imvels in Monitoring Stations Versus Time Figure 3 Canna Scan Results for Monitoring Station MS-2 Versus Time 1 Tables Table 1 Third Quarter Cmposite Sr 89 Groundwater Results Table 2 Third Quarter Caposite Sr-90 Groundwater Results 4 Drawing Groundwater Tritito Concentrations at Site Liquid Monitoring Stations o k n i j

Figure 1 Page 1 of 15 I Tn! ENVIRONMENTAL CONTROLS GROUP MONITORING STATION 1 6' 10 s 5 10 T TRITIUr1 CONCENTRAT10N IPCI/L1 VERSUS TIME ? 4 I 10 U M P 3 C 10 I 2 10 E R I 10 O i i i i n e i n i i i i IC F n A n J J A 5 0 N D A E A P A O U U E C D E N 3 R R Y N L G P T V C 1982 S 6 ** 8 9-

Figure 1 Page 2 of 15

  • n! ENVIRONMENTAL CONTROLS GROUP MONITORING STATION 2

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10 1 l R I 4 I 10 U M s P 3 C 10 I / L 2! TRITIUM CONCENTRATION (PCI/L1 VERSUS TIME 10 r-E I' R I 10 1 e i e i i i C J F M A M J J A 5 0 N D IO A E A P A U U U E C D E N 3 R R Y N L G P T V C '98 r- - 4 y )

Figure 1 Page 3 of 15 I MI ENVIRONMENTAL CONTROLS CROUP MONITORING STATION 3 i G 10 - - r i i i i i i l 1 to L S 1 L R I T I ' O, U M P 3 C 10 I i / L 2 10 E R 3 10 TRITIUM CONCENTRATION (PCI/LI VERSUS TIME O i i i i i i i i e 'O J F M A N J J A 5 0 N D A E A A U U U E C O E N 9 R R Y N L G P T V C 'G82 i e a e

w. p.,

Figure 1 Page 4 of 15 TMI ENVIRON." ENTAL CONTROLS GROUP MONITORING STATION 4 6 10 ! i 5 10 T R I T 4 1 10 U ~y 0 0 0 p 3 C 10 2 = / L ( I p T 10 E R TRIT]Url CONCENTRATION (PCI/L1 VERSUS tit 1E iu 0: i i i i i i e e i i i 10 J F 9 A n J J A 5 0 N D A f. A P A U U U E C 0 E N 8 R R Y N L G P T V C 1982 s v -- ,v ~ e . - ~.. - - so --~-~ *~

1 l Figure 1 Page 5 of 15 TMI ENVIRONMENTAL CONTROLS GROUP MONITORING STATION 5 6 10 i i 5 10 T R I T 4 I !O U M P 3' C 10 ~~ I m m = = / 2 3 I 23 T 10 p E R t i I 10 h TRITIUM CONCENTRATION (PCI/L1 VERSUS TIFIE I t I O t 1 i i i e i i i i i 30 J F n A M J J A 5 0 N D A E A P A b U U E C 0 E N a R R Y N L G P T V C 'GS2 ) 4 g e e e

Figure 1 P.,ge 6 of 15 Tn! ENVIRONMENTAL CONTROLS GROUP MONITORING STATION 6 6 10 i j' 5 IG T R I T 4 I 10 U M 3 C 10 I w m 1 I L 2 T 10 E R I TRJTIUM CONCENTRATION (PCI/L1 VERSUS TIME 10 0 i i i i i i i i 10 J F M A F J J A 5 0 N D A E A P A U U U E C 0 E 8 R R Y N L G P T V C 1982 s ' " * ~ ~ " * ~ ~ ~ ~ ~ I ~f (~ ~ 'T1

Figure 1 Page 7 of 15 TMI ENVIRONMENTAL CONTROLS GROUP MONITORING STATION 7 10 i i i i i i i i i i i i t 5 10 T R I T I 104 :- O M P 3 C 10 1 9 x x x 1 L 1 s' I 2 T 10 E R I TRITIUM CONCENTRATION (PCI/L) VERSUS TIME 10 0 i i i i i i i e i i 0 J F 7 A 9 J J A 5 0 N D A E A P A U U U E C D E h 8 R R Y N L G P T V C '9e? 4

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N Figure 1 Page 8 of 15 TMI ENylRONMENTAL CONTROLS GROUP MONITORING STATION 8 6 10, i 0 10 T l R I I 4 I 10 U N 3 C 10 I L 2 10 E R I TRITIUM CONCENTRATION (PCI/L1 VERSUS TIME ID 0 i 1 1 i n g y n A n J J A 5 0 N D 10 A E A P A U U U E C D E N g R R Y N L G P T V C 1992 l

Figure 1 Page 9 of 15 TMI ENVIRONMENTAL CONTROLS GROUP OBSERVATION STATION 10 10 i i i i i i i i i i i i i i 105p T R 6 I J - :] 1 N-3 C 10 I = / L 2 T 10 E R I TRITIUM CONCENTRATION (PCI/L1 VERSUS TIME 10 0 i 10 J F M A M J J A S O N D A E A P A U U U E C D E N 8 4 R Y N L G P T V C 1997

Figure 1 Page 10 of 15 i TMI ENVIRONMENTAL CONTROLS GROUP OBSERVATION STAT 10N 13B 8 10 i i i i i i i i i i i 5 10 T R I T 4 1 10 U M P 3 C 10 ~ I = E-g / L 2 I0 E R I TRITIUM CONCENTRAT10N fPCI/L1 VERSUS TINE 10 1 0 10 J F M A D J J A 5 0 N D A E A P A U U U E C D E N B R R Y N L G P T V C l '982 8

Figure 1 Page 11 of 15 i l l Tr'I ENVIRONMENTAL CONTROLS GROUP OBSERVATION STATION 14 IO i i i i i i i i 5 10 T R I 4 I 10 U M P 3 C 10 h } E 1 I L 2 T 10 E ~~ R 3 10 TRITIUM CONCENTRATION (PCI/L1 VERSUS TIME O IC i i i i i i i i i J F M A 5 J A 5 0 N D A E A P A U U U E C 0 E N B R R Y N L G P T y C '982 1 e

Figure 1 Page 12 of 15 TMI ENVIRONMENTAL CONTROLS GROUP OBSERVATION STATION 15 6 10 a 5 TRITIUM CONCENTRATION (PCI/L1 VERSUS T It1E 10 T R ,I k 104 U f1 P 3 C 10 I / O 2 T 10 E R 3 10 I I i o! i a i i i i i i i e i ig J F n A N J J A 5 0 N D A E A P A U U U E C 0 E N 3 R R Y N L G P T V C 1982

Figure 1 Page 13 of 15 TPI ENVIRONMENTAL CONTROLS GROUP OBSERVATION STATION 16 O ~ .C 1 i i i 1C5,_ j 1 1 d f R i gb I I 10 b: 4 U M P 3 C 10 I / L 2 10 E R 3 10 TRITIUM CONCENTRATION IPCI/L1 VERSUS TitfE 01 10 1 J F M A n J J A 5 0 N D A E A P A U U U E C 0 E N S R R Y N L G P T V C 1982

Figure 1 Page 14 of 15 TMI ENVIRONMENTAL CONTROLS CROUP OBSERVATION STATION 17 6 10 i i i 6 10 T R l I i T 4: I 10 I U M C L p 3 C 10 I / h 4 102 E R I ID TRITIUM CONCENTRATION (PCI/L1 VERSUS TIME C 10 J F M A N J J A 5 0 N D A E A P A U U U E C 0 E N 3 R R Y N L G P T V C '982 e l i 1

Figure 1 Page 15 of 15 TMI ENVIRONMENTAL CONTROLS GROUP OBSERVATION STATION EDCB 8 10 i i i i i i i 5 I TRITIUM CONCENTRATION (PCI/L1 VERSUS TIME 10 T R I T 4 I 10 U M P 3 C 10 I / ( Qf- ~~ g n I u N 2 T 10 A E 3 10 0 1 e i i i i i i i e 10 J F M A M J J A 5 0 N D A E A P A U U U E C 0 E N O R R Y h L G P T V C 6962

Figure 2 Page 1 of 15 MONITORING STATION 1 295 g g g g g g g g l l 293 l M291 E A 289 N 287,w S E 285 F A ^ 283 E 281 v E 279 L 277 ~ F 275 E E 273 T 271 269 l-TNI ENVIRONMENTAL CONTROLS. MEAN SEA LEVEL t i 267I-I I I I I I I I I I I I 2s5' l J F M A M J J A 5 0 N D A E A P A U U U E C 0 E N B R R Y N L G P T V C 1982 i l

i Figure 2 t Page 2 of 15 l MONITORING STATION 2 295 l g g g g g j g g 293 M291 E A 289 N 287 S E 285 ^ 283 L E 281 y E 279 L l 277 - t F 275 E E 273 TNI ENVIRONMENTAL CONTROLS. NEAN SEA LEVEL T 271 269 267 I I I I I I I I I I I I 265 J F M A N J J A 5 D N D A E A P A U U U E C 0 E N 8 R R Y N L G P T V C l 1982 4

Figure 2 Page 3 of 15 MONITORING STATION 3 295 g g g g g g g l l l l l 293 M 291 E A 289 N 287 S E 285 n n n n 283 0 0 0 E 281 y E 279 L 277 F 275 E E 273 TNI ENVIRONMENTAL CONTROLS MEAN SEA LEVEL T 271 269 267 I I I I I I I I I I I I 265 J F M A M J J A 5 0 N D A E A P A U U U E C D E l N 8 R R Y N L G P T V C l 1982 i e I

Figure 2 Page 4 of 15 MC:4ITORING ST ATION 4 295 g g g g g g g g g g y 293 M291 E A 289 N 287}- s i E 285 m 283 E 281 0 y V E 279 L 277 i F 275 E E 273 TMI ENVIRONMENTAL CONTROLS, MEAN SEA LEVEL T 271 269 267 I I I I I I I I I I I I 2s5 J F M A M J J A 5 0 N D A E A P A U U U E C D E N 8 R R Y N L G P T y C 1982 1 I i

Figure 2 Page 5 of 15 MONITORING STATION 5 295 i g 293'- M 291.- E i A 289 N 287 S E 285 A 0 0 a 283 L E 281 t v E 279 l L 277 l F 275 E E 273 TMI ENVIRONMENTAL CONTROLS. MEAN SEA LEVEL T 271 2s9 267 I I I I I I I I I I I I 2ss J F M A M J J A 5 0 N D A E A P A U U U E C D E N 8 R R Y N L G P T V C 1982 j l

Figure 2 i Page 6 of 15 l MONITORING STATION 6 295 i g g g j g g g g g 293L 1 M 291 '-- r E A 289 N 287 S E 285 283 L E 281 9 y E 279 L. 277 F 275 E E 273 TMI ENVIRONMENTAL CONTROLS, MEAN SEA LEVEL T 271 269 267 I I I I I I I I I I I 265 J F M A M J J A 5 0 N D A E A P A U U U E C D E N B R R Y N L G P T V C 1982

l Figure 2 l Page 7 of 15 I l MONITORING STATION 7 295 i l I I I i l I I I l l l 293h i M 29! E A 289 N 287 S E 285 283 v L E 281 y E 279 t 277 F 275 E E 273 TMI ENVIRONMENTAL CONTRCLS, MEAN SEA LEVEL T i 271 269 267 I I I I I I I I I I I I 265 J F M A M J J A S O N D A E A P A U U U E C D E N B P R Y N L G P T V C 1982 1 e J

Figure 2 Page 8 of 15 l MONITORING STATION 8 295 j 293 M 291 E A 289 N 287 285 O n 283 3 L E 281 V E 279 L-277 F 275 E E 273 TMI ENVIRONMENTAL CONTROLS. MEAN SEA LEVEL T 271 269 267 I I I I I I I I I I I I 265 J F M A M J J A 5 0 N D A E A P A U U U E C 0 E N 8 R R Y N L G P T V C 1992 9 i

ll ll IlIl n i 5 DEC p 1 9-f q, 2o m i e9 r i ue N0V gg ia FP y n i 0CT m LE V ^ E i i L 5EP A ES e N i 9 A AUG E ~. M N n O S I T L JUL A O T R S T i N N i O O C JUN I T L 4" A A i T V i R N E E NAY S M B N O O e R a I V APR N E a i ~ i I M 4FAR ( a i i FE8 i 2 JAN 8 6 N*IF:- 1 9 7 5 9 7 5 3 1 ll 9 7 5 3 9 9 9 8 8 8 8 8 7 7 7 7 7 6 6 6 1 5 3 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 NEAN 6E^ LEVEL FEET l 11 1 l' l l 1 ll'

Figure 2 Page 10 of 15 OBSERVATION STATION 10 i i i a i i i 295 ~ 293 - ~ M291 E A 289 N ~ 287 S n E 285 n a-0 ~ A g-f 283 v ) L E 281 V f E 279 i L 277 F 275 E TMI ENVIRONMENTAL CONTROLS, MEAN SEA LEVEL E 273 T 271 i 269 I } 267 J F M A M J J A 5 D N D l 265 j A E A P A U U U E C O E i N B R R Y N L G P T V C 9 1982 1 ~

Figure 2 Page 11 of 15 - OBSERVATION STATION 138 l i i e j i i i i e i i 295 ~ i 293t-- T1291 ~ E A 289 ~ N 287 S E 285 m 283 y l L u E 281 V E 279 ~ L 277 F 275 i TNJ ENVIRONMENTAL CONTROLS, NEAN SEA LEVEL E E 273 T i 271 269 267 t I i i I I I I I A I I J F M A M J J A 5 0 N D l A E A P A U U U E C D E 265 N B R R Y N L G P T V C 1982 9 'e s .. s.

l jI ~ I 5 1 i f DEC o 2 g 2 e1 I rue e gg ia NDV FP I i DCT LE V E I L i 5EP A ES I i N 4 A AUG 1 EM N I O i S I T L JUL A O T R S T I N N i O O C JUN I T L A A i V T e R N E E MAY S M B N O O I R i I V APR N E I i I M T MAR I i FE8 1 i 2 JAN8 9 ,I'- G - 1 i't l 9 7 5 9 7 5 3 1 9 7 5 3 1 5 3 9 9 9 8 8 9 8 8 7 7 7 7 7 6 6 6 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 MEA SEA LEVEL FEET l1 filIfIl

Figure 2 Page 13 of 15 OBSERVATION STATION 15 i i i i i i e i 295 i 293 N291 E TNI ENVIRONMENTAL CONTROLS. MEAN SEA LEVEL A 289 N l ~ 287 S E 285 A 283 L E 281 V ~ E 270 L 277 C 0 F 275 E E 273 T 271 269 267 i J F M A M J J A 5 0 N D 265 A E A P A U U U E C D E N 8 R R Y N L G P T V C 1982 i e I 1 \\ / W 6 N,e;g*_____'e._ _ _ _ _ _ _ _ _ _ _ _ _ _ _ W 8

Figure 2 Page 14 of 15 OBSERVATION STATION 16 l 295 i i i i i i i 293 N 291 g E O O A 289 k i N 287; S i E 285 A 283 L E 281' V E 279 L TMI ENVIRONMENTAL CONTROLS, NEAN SEA LEVEL 277 1 F 275 E E 273 T i 271 i 269 i 2S'1 i 265 J F M A M J J A 5 0 N D A E A P A U U U E C 0 E N B R R Y N L G P T V C l IG82 i 4 i I 1 l l

c-Figure.-2. Page 15 of 15 l l OBSERVATION STATION 17 295 293 M 291 E A 289 N 287 S n E 285 0 n A f ~ 283 E ~ L 4 E 281 V E 279 L 277 F 275 E E 273 4 T ~ TNI ENVIRONMENTAL CONTROLS, MEAN SEA LEVEL 271 269 267-- 265 e a i J F M A M J J A S 0 N D A E A P A U U U E C D E N B R R Y N L G P T V C 1982 i l l +*

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Table 1 Page 1 of 1 1982 3rd Quarter Sr-89 Results Station Sr-89 MS-1 <.613 MS-2 MS-3 <.665 MS-4 <.647 MS-5 <.724 MS-6 .370 I.350 MS-7 <.306 MS-8 <.660 OS-10 <.722 OS-ISB <t629 OS-14 <.810 OS-16 <.633 OS-17 <l.27 EDCB

  • Composite sample from July 6, 1982 to September 13, 1982.

Tabla 2 Pag 1 of 1 rd 1982 3 Quarter Sr-90 Results Station Sr-90 Result Sr-90 LLD MS-1 <.481 <.481 MS-2 <.800 <.800 MS-3 .515 I.22 <.289 MS-4 .266 .24 <.352 M.-5 <.510 <.510 MS-6 <.421 <.421 MS-7 <.515 <.515 MS-8 <.536 <.536 OS-10 .313 I.26 <.386 OS-13B <.489 <.489 OS-14 <.611 <.611 OS-16 .312 I.22 <.320 OS-17 .566 I.44 <.655 EDCB <.428 <.428

  • Composite sample from July 6,1982 to September 13, 1982.}}
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