ML20031F851

Submits Fifth Periodic Rept Presenting Results of Ongoing Efforts to Detect Potential Radioactive Water Leakage from Containment Bldg

ML20031F851
Person / Time
Site:	Crane
Issue date:	10/15/1981
From:	J. J. Barton METROPOLITAN EDISON CO.
To:	Barrett L Office of Nuclear Reactor Regulation
References
LL2-81-0235, LL2-81-235, NUDOCS 8110200480
Download: ML20031F851 (40)

Text

{{#Wiki_filter:. Metropolitan Edison Company q y - iy - (4~ y-) Post Of fice Box 480 e Maklictown, Pennsylvania 17057 s Writer's Direct Det Number October 15 1981 LL2-81-0235 e TMI Program Office 13 ~~ Attn: Mr. L. H. Barrett, Deputy Program Director a g U. S. Nuclear Regulatory Commission Q yin c/o Three Mile Island Nuclear Station gg .'tidcletown, Pennsylvania 17057 c.,p !b

Dear Sir:

a co Three Mile Island Nuclear Station, Unit 2 (THI-2) F Operating License No. DPR-73 C'- Docket No. 50-320 Containment Integrity Assessment Program This is the fifth periodic report presenting results of our ongoing efforts to detect potential radioactive water leakage from the containment building. The status of the various portions of this b, g ( r{W program are discussed below. g c s Groundwater Monitoring C lf Vs $[(, If Y A I ? The following groundwater monitoring data is attached, gCT19 ggg a iT 1 Individual computer graphs (Figure 1) of tritium concentrat opd'*8'%g%@r 1. for each monitoring station and the East Dike Catch Basin (EDC,B) %ss up to an including July 1, 1981. 'lv 2. Individual computer graphs (Figure 2) indicating water levels us within the monitoring stations up to and including September 2, 1981. 3. Computer tables (Tables 1 and 2) of gamma scan data up to and including September 2, 1981 for MW-2 (results for all other wells are through July 1, 1981). 4. A graph indicating gamma scan data from Monitoring Station MW-2 (Figure 3). AO O/ 5. A composite drawing showing all monitoring locations with a graph of the tritium concentrations for each station. g Tritium concentrations for the reporting period of June 17, 1981 to July 1. 1981 remained within the range of values seen in previous / [ samples. .Jo samples were collected from OW-9 for the period since efforts to remove the blockage from the well proved unsuccessful. Also, no sample was obtained from the EDCB on June 17, 1981 due to a lack of water in the basin. 8110200480 811013' Metropol.ti : PDR:ADOCK 05000320 the General Public Utaties System i R PDR-

Mr. L. H. Barrett LL2-81-0235 Gamma results from all the vell sampics (except MW-2) obtained from June 17, 1981 - July 1, 1981 were normal. Gamma results from MW-2 for the August 5,1981 sampling date were normal while the September 2,1981 sample showed a positive Cs-137 value of 8.12 1 4.41 pCi/t. A re-analysis of the sample is being performed. The results of this re-analysis will be reported in a subsequent report. Sr-69 and Sr-90 resulte for both MW-1 and MW-2 during the reporting period (June 17, 1981 - July 1, 1981) were normal. Likewise, the 1981 second quarter Sr-89/90 composite results for all the wells were normal. The EDCB Sr-90 results was reported as a positive value of 1.2 i.5 pCi/t with a re-analysis of the sample reporting 1.0 i.5 pci/1, however, the third quarter composite for the EDCB was less than LLD. This value is only slightly above the laboratory's lower limit of detection (LLD). The Sr-89 result was below the LLD. Cork Seal, Tendon Access Gallery and Containment Oater Wall Radiation Monitoring Surveillance of the tendon gallery, cork seal and outer wall have shown no indication of containment leakage of significant changes. Reactor Building Sump Water Level Figure 4 presents sump level data for the period January 1, 1980 through September 10, 1981. Sump level measurements continue to correspond to predicted levels within the accuracy of the measuring technique. S cer y, j J n A ti irector, TM1-2 JJB:JJB:djb

• tachments cc:

Dr. B. J. Snyder, Program Director THI Program Office

c. 4 1 LIST OF ATTACHMENTS j Figure 1 - Graphs of Tritium Concentzations of Monitoring Stations and East Dike Catch Basin Samples versus Time. Figure 2 - Graphs of Water Levels in Monitoring Stations versus Time. Figure 3 - Ga=ma Scan Results for Monitoring Station MW-2 versus Time. i Figure 4 - TMI Unit II Reactor 3uilding Sump Level. Table 1 - Cesium-137 Concentrations of Monitoring Sta: ions MW-1 to MW-8. i Table 2 - Cesium-134 Concentrations of Monitoring Stations MW-1 to MW-8. Drawing

• Groundwater Tritium Concentrations at Site Liquid Monitoring Stations.

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M i J TMI ENVIRONMENTAL CONTROLS GROUP MONITORING VELL NUMBER 1 10 E3 0 TRITIUM CONCENTRATION (PCI/L) VERSUS TIME T 8 R I T 7 I U M 6 P C 5 I / l L 4 i I T 1 E 3 i R i j 2-i 1 ~ I e *I+fs?u.wi4Cs1-5,_h g J F M A M J J A S O N O J F M A n J J A E. A P -A U U U E C 0 E A E A P A U U i N 8 R R Y N L G P T V C N B R R Y N L 1980 1981 FIGURE 1, PAGE 1 4

O TMI ENVIRONMENTAL CONTROLS GROUP MONJTORING VELL NUMBER 2 10 E3 g TRITIUM CONCENTRATION (PCI/L1 VERSUS tit 1E T 8 R I T 7 I U M S P C 5 I ~ / 1. L 4 1 I T 1-( .5 j E 3 R f 2 .t. a n ~ 1 O J F M A M J J A S O N O J F M A M J: rJ A E A P A U U U E C O E A E A P-A' O U N-B R R Y N L G P T V C N 8 R 'R Y .N L 1980 1981 FIGURE 1, PAGE 2 ~

I TMI ENVIRONMENTAL CONTROLS GROUP MONITORING VELL NUMBER 3 10 E3 i g TRITIUM CONCENTRATION (PCI/L) VERSUS TIME T 8 R y T 7 l I U M 6 P i C 5 ~ I / ~~ L 4 1 I T E 3 R T k' 5 f. 2 g_ i V 3 g-M J.'J O '''n A J F M A M J J A S 0 N D J F D E A E A P-A ' U 'U .A E A P A U U U E C ~ V C N B R R . Y N L N 8 R R Y N L G P T 1980 1981 FIGURE 1, PAGE 3 1 .,we*y, ,--e+w- -,~-,-g we ia ---wye--- mop eye

9 THI ENVIFTNMENTAL CONTROLS GROUP MONITORING'WELL NUMBER 4 10 i E3 9 t TRITIUM CONCENTRATION (PCI/L1 VERSUS TIME T 8 R I T 7 I U M S P C s I ~ i / l L 4 I T E 3 I 2 ."E. g 1 c. .- =. =; m o J F M A M J J A S O N O J F M A ~. M .J J .A E A P A U U U E C 0 E A E A P '..A 'O .U N B R R Y N L G P T V C N B R R Y, N L ' ~ 1980 1981 FIGURE 1, PAGE 4 4 1

TMI ENVIRONMENTAL CONTROLS CROUP MONITORING VELL NUMBER 5 4 10 1 E3 9 TRITIUM CONCENTRATION (PCI/L1 VERSUS TIME T 8 R 1 I T 7 I 1 U l M S P C 5 I / L 4 I T E 3 R .2 ) uss- ~.. N 0lJ " "J J A S 'O N D J 'F M A 'n 'J J F M A M A E A P A U U U E C O E A E A P A U U N B R R Y N L G P T V C N B R R Y N L l 1980 1981 l FIGURE 1, PAGE 5 m

\\lI (' )j lj )ll)1 ~ ~ J UL 3-a M J UN S y NAY B %y-R E M % APR U N T. L E MAR L M 7-I E 5 W T i FEB f G S ?- 1 U N S 8 JAN 9 I R R 1 O E T V DEC I N ) L O / M C NOV I P 6 P ( E OCT U T G m O N A R O P I G SEP T S A L 1 M L R E O T AUG R R N 5 U E G T C I N O N JUL F C O L C A M JUN T U m N I E T NAY I M c N R n O T R APR I V N E MAR I M EB T 0 8 J AN 9 1 0 03 9 8 7' 6 5 4 3 2 1 1E TRITIUM PCI/ LITER 1, r1) ll' jtll' l l

TMI ENVIRONMENTAL CONTROLS GROUP MONITORING VELL NUMBER 7 10 E3 g - l t T 8 TRITIUM CONCENTRATION (PCI/L) VERSUS TIME R I T 7 I U M 6 P C 5 I / L 4 I 4 T i E 3 R 2 4 1 0 J F M A M J J A S O N O J F M A M J J l A E A P A U U U E C D E A E A P A U U N B R R Y N L G P T V C N 8 R R Y N L 1980 1981 FIGURE 1, PAGE 7 I

f i TMI ENVIRONMENTAL CONTROLS GROUP MONITORING VELL NUMBER 8 10 E3 4 91-I TRITIUM CONCENTRATION (PCI/L1 VERSUS TIME T 8 R I i T 7 U M G P C 5 I / L 4 I T E 3 R 2 ) ' h *' - A a O J F M A M J J A S O N 'O J F M A M J J A E A P A U U U E C D E A E A P A U U N 8 R R Y N L G P T V C N B R R Y N L 1980 1981 .p., FIGURE 1, PAGE 8

TMI ENVIRONMENTAL CONTrROLS GROUP OBSERVATION VELL NUMBER 9 10 E3 g i i s TRITIUM CONCENTRATION (PCI/L1 VERSUS TIME T 8 R I T 7 U M G .L P C 5 I / L 4 1 I ( ) T J j E 3 i R q g 0 1 T 1 T 4 2 1 2 ~ } 1 i o J F M A M J J A S O N D J F M A M J J A E A P A U U U E C 0 E A E A P A U. U N 8 R R Y N L G P T V C N B R R Y N L 1980 1981 4 ^ FIGURE 1, PAGU 9

.i i TMI ENVIRONMENTAL CONTROLS GROUP OBSERVATION WELL NUMBER 10 10 E3 i 9 ig TRITIUM CONCENTRATION (PCI/L) VERSUS TIME T 8 R I T 7 I i U M 6 P cs I / L 4 I i T l E 3 ~ ^ R ) ~ j 1 0 J F M A M J J A S O N D J F M A M J J A-E A P A U U U E C 0 E A E A P A U U N 8 R R Y N L G P T V C N B R R Y N L 1980 1981 l FIGURE 1, PAGE 10

4 TMI ENVIRONMENTAL CONTROLS CROUP OBSERVATION WELL NUMBER 13B 10 1 E3 9 t TRITIUM CONCENTRATION (PCI/L) VERSUS TIME T 8 R I T 7-I U M S P { C 5 I / L 4

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JUL 1 r ~ JUN s 4 B m. R E MAY M U APR N p_m L E L M MAR E I W T FE8 N S O U 1 I S 8 T R JAN 9 A E 1 V V R E DEC 1 S L y. B / 2 O I 1 N0V C m. P P EG ( A U OCT P O N R O G I 1 T SEP S A E L R R O T U R N AUC G I T E e_.. F N C O N JUL C O L C A M JUN T U N I E T M I MAY N R O T R APR I V N E MAR I M T FEB 0 9 J AN 9 1 o 03 g 8 7 G 5 4 3 2 1 1E l TRITIUM PCI/ LITER 8

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d 1 .l i TMI ENVIRONMENTAL CONTROLS GROUP ODSERVATION WELL NUMBER 16 10 E3 g i: TRITIUM CONCENTRATION (PCI/L) VERSUS TIME T 8 R y T 7 A I U M 6-i P C 5 I / L 4 DV I 1 T E 3 J i R 1 t. 2 J 7. a.,.*- ~ i T 1 i -l(i6iNd;.$ki " ' ' * ""j* *hi.i!$M - 0 J F M A M J J A S O N D J F M .A . M..J c). 3.. J A E A P A U U U E C D E A E A 'P ' sEAW: U'.. U N. 8 R R Y N L G P T V C N B-R' ' N ' ':'f !.N L 1980 1981 FIGURE 1, PAGE 14 i

TMI ENVIRONMENTAL CONTROLS GROUP OBSERVATION WELL NUMBER 17 10 E3 g l t TRITIUM CONCENTRATION (PCI/L) VERSUS TIME T 8 R I T 7 I U j M 6 P C 5 I __ Q ~ ~ 4 / J[pa .[ [ L 4 ~ T 4 ~ ~ E 3 - 1 R { 2 1 O J F M A M J J A S O N D J F M A M J J A E A P A U U U E C 0 E A E A P A U U N B R R Y N L G P T V C N B R R Y N L 1980 1981 FIGURE 1, PAGE 15 i

i TMI ENVIRONMENT AL CONTROLS GROUP EAST DIKE CATCH BASIN 10 I E3 9 i TRITIUM CONCENTRATION (PCI/L1 VERSUS TIME T 8 R I T 7 I U M S P C 5 I / L 4-I 1 T ~ I E3 R 2 e 1 4 1-i t i 0 ~ J F M A M J J A S O N D J F M A M J A E A P A U U U E C D E A E A P A U 4 N B R R Y N L G P T V C N 8 R R Y N L j 1980 1981 FIGURE 1, PAGE 16

MONITORING VELL NUMBER 1 295 g g g g g g g ] g g g j g g g g g g g g 293 M291 E' TMI ENVIRONMENTAL CONTROLS, MEAN SEA LEVEL A 289 N 287 l S ] E 285 4 A l 283 L a E 281 V i E 279 t L 277 F 275 I E. E 273 T l 271 s i 269 i 267 f I I I I I I I I I I I I I I I I I I I I l 265 J F M A N J J A S O N D J F M A M J J A S A E A P A U U E C D E A E A P A U U U E N B R R Y N L G P T V C N 8 R R Y N L G P !980 1981 i FIGURE 2, PAGE 1 3 i (

V s MONITORING VELL NUMBER 2 l l l l l l l l l l l l l l l l l } j j l 293 1 M 291 d' Tril ENV '.RON!1ENT AL CONTROLS. MEAN SEA LEVEL A 289 N 287 S E 285 i A 283 L l E 281 v E 279 L 277 F 275 E E 273 T 271 269 j 2G7 I I I I I I I I I i I I I I I I I I I I L 285 J F M A M J J A S O N O J F M A M J J A S A E A P A U U U E C D E A E A P A U U U E N 8 R R Y N L G P T V C N 8 R R Y N L G P 1980 1981 FIGURE 2, PAGE 2 ~ 4

MONITORING VELL NUMBER 3 295 g g g g g g j g g g g j I 293 M291 TMI ENVIRONMCNTAL CONTROLS, MEAN SEA LEVEL A 289 N 287 S E 285 A 283 L 4 E 281 V E 279 L 277 F 275 E E 273 T 271 269 r 1 287 I I I I I I I I I I I I I I I I I I I I 2s5 J F M A n J J A S O N O J F M A M J J A S A E A P A U U U E C 0 E A E A P A U U U E N B R R Y N L G P T V C. N B R R Y N L G P L i 1980 1981 FIGURE 2, PAGE 3 i

l J SEP g I AUG g I JUL g I JUN g I NAY L g E I VE APR g L I A MAR E g I S 4 FEB R N E g A I 1 8 B E M M JAN 9 g I 1 U N DEC 4 S p I E L L L g O G E R N0V A W T I P g N G O N C OCT 2 I R g I E L R O A SEP U T g T I IG I N i N E F O M AUG M g N I O R JUL I g I V N JUN j E I I H MAY g T I APR g I MAR g I FEB g I 0 8 JAN 9 1 9 7 5 9 7 5 9 7 5 3 5 3 1 1 9 9 9 8 8 8 8 7 7 7 7 7 6 6 s 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 M$' A N SE EL FEET ~

O MONITO. RING WELL NUMBER 5 i 295 g g g g g g g g j g g g g g g g g g g 293 M291 l 5: ~ i A 289 TMI ENVIRONMENTAL CONTROLS..MEAN SEA LEVEL N 287 S i E 285 A 4 283 L E 281 v i E 279 4 L 277 1 F 275 E E 273 i T 271 289 267 I I I I I I I I I I I I I I I I I I I I I 285 J F M A M J J A S O N O J F n A N J J A S j A E A P A U U U E C D E A E A P A U U U E N 8 R R Y N L G P T V C N 8 R R Y N L G P 1980 1981 FIGURE 2, PAGE 5 i

+ ~ SEP g I AUG g I JUL g I JUN g I MAY L j E I V E APR L g I A MAR E g I S S R FE8 E g N I 1 A 8 8 E M M JAN9 U g I 1 N 6 S DEC E L L L g O O I GA E R g P e NDV W T 8 I g N G G O g 2 N C g OCT E I I R g R L U O A SEP G T T I I g N I F N E A U'G O M M g N I O R JUL I V I N JUN E g I I H HAY T g I APR g I MAR g I FEB g I 0 8 9 JAN 1 9 7 s 9 7 5 3 5 3 9 7 5 3 1 1 1 9 9 9 8 0 8 8 8 7 7 7 7 7 6 6 s 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 M$AN sE EVEL FEET I.

!l lll l' ~ j SEP I g AUG g I JUL g I JUN g I MAY L g E I V E APR g L I A MAR g E I S 7 FE8 R N E g A I 1 8 B E M M JAN9 U g I 1 N S OEC 7 L L L g O I E E R G NDV V T I A j N P G O N C OCT I g I 2 i R L E O A SEP R T U I g T I G N I N E O M AUG F M g N I O R JUL g I I V N JUN g E I I M MAY g T I APR g I MAR g I FE8 g I 0 8 JAN 9 1 9 7 5 9 7 5 3 9 7 5 3 5 3 1 1 1 9 9 9 8 8 8 8 8 7 7 7 7 7 6 6 8 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 I. M'E A N SEA LEVEL FEET l l l!1 l lll

w I SEP g I AUG I JUL g I JUN g I MAY L I g E V E APR g L I A MAR g E I S 8 FEB R g A I 1 N E 8 B E M M JAN9 U I 1 g N S OEC 8 L g O E L I L E R G NOV A V T I P g N G O N C OCT 2 i I R g I L ER O A SEP T U I g T I G N I N E O M AUG F M g N I O R JUL g I I V N JUN g E I I M NAY g T I APR g I MAR g I FEB I 0 8 JAN 9 1 9 7 5 9 7 5 3 9 7 5 3 5 3 1 1 1 9 9 9 8 8 8 8 8 7 7 7 7 7 6 6 8 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 MCAN SEA LEyEL FEET llll l ,l'

e OBSERVATION WELL NUMBER 9 295 + i i i i e i i i i i i i i i i i i i i i ^ 293 M 291 8' TMI ENVIRONMENTAL CONTROLS, MEAN SEA LEVEL A 289 287 S E 285 A 283 L 0' E 281 V E 279 L 277 F 275 E E 273 T 271 269 267 265 J F M A M J J A S O N O J F M A M J J A S A E A P A U U U E C O E A E A P A U U U E N 8 R R Y N L G P T V C N 8 R R Y N L G P 1980 1981 FIGURE 2, PAGE 9 i

e OBSERVATION VELL NUMBER 10 1 295 i i i i i i i i i i i i i i i q 293 M 291 TMI ENVIRONMENTAL CONTROLS, MEAN SEA LEVEL E. A 280 N 21: a - S E 28b A 00 i 283 1 L i E 281 . M V E 279 { L l 277 F 275 L E 273 1 T 271 1 269 267 265 --J F M A M J J A S O N D J F M A M J J A S i 4 A E A P A U U U E C D E A E A P A U U U E N 8 R R Y N L G P T V C N B R R Y N L G P 1980 1981 FIGURE 2, PAGE 10 i ~

e i SEP AUC )UL JUN i NAY L E V E APR L B A nAR 3 E 1 S FE8 R N E i A 1 8 B E JAN 9 M M U 1 N 1 S DEC 1 L L E L i O G E R N0V A W T P N N O O C OCT 2 i I i E T L R A A SEP U V i G R i T I N E E F AUG S M B i N O O R JUL i I V N JUN i E I M MAY i T APR MAR i FE8 i 0 8 JAN 9 1 9 7 5 9 7 5 3 9 7 5 3 5 3 1 1 1 9 9 9 8 8 8 8 8 7 7 7 7 7 6 6 6 2 2 2, 2 2 2 2 2 2 2 2 2 2 2 2 2 AN SEA LEVEL FEET .l l ,i l4 .1 .;i3 ] 4

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OBSERVATION VELL NUMBER 15 295 l 293 ,291 THI ENVIRONNENTAL CONTROLS, r1EAN SEA LEVEL A 289 N 287 S E 285 A 283 L- ~ E 281 e j 1 !79 i I L 277 99 275 g E 273 T U 271 269 267 285 J F M A M J J A 5 O N O J F M A M J J A S A E A P A U U E C O E A E A P A U U U E N B R. R Y N L G P T V C N 8 R R Y N L G P 1980 1981 FIGURE 2, PAGE 13 I

) OBSERVATION VELL NUMBER 16 295 293 N291 289 N 1 287 s E 285 A 283 L E 281 V E 279 L 277 TMI ENVIRONMENTAL CONTROLS, MEAN SEA LEVEL F 275 E E 273 T 271 289 4 267 2G5 J F M A N J J A S O N D J F M A M J J A S A E A P A U U U E C 0 E A E A P A U U U E N B R R Y N L G P T V C N B R R Y N L G P 1980 1981 FIGURE 2, PAGE 14 i

-l OBSERVATION VELL NUMBER 17 295 i i i i i i i i i i 4 4 i i i i i i i i 293 M291 TMI ENVIRONMENTAL CONTROLS, NEAN SEA LEVEL j If' l A 289 N 287 l S E 285 l A 283 t L I E 281 V i E 279 L 277 F 275 E E 273 i T i 271 269 267 265 J F M A N J J A S O N O J F M A 'n J J A S A E A -P A U U U E C 0 E A E A P A U U U E N B R R Y N L G P T V C N 8 R R Y N L G P 1980 1981 4 FIGURE 2, PAGE 15 i j

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December 3,19tes 2

s s a 2 a s a a a s a s s s .,2 December it,1980s 13,9 4.2 s a a 1 a J a s s a 2 December' 17,1980s s 35 .s.9 s s s s s 3 s s s s Decemb e r 24,1980s

10,5 3.9 s a

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