ML20003E844

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Forwards Groundwater Monitoring Data for 800125-810225. No Substantial Changes in Tritium Concentrations
ML20003E844
Person / Time
Site: Crane Constellation icon.png
Issue date: 04/09/1981
From: Hovey G
METROPOLITAN EDISON CO.
To: Barrett L
Office of Nuclear Reactor Regulation
References
LL2-81-0090, LL2-81-90, NUDOCS 8104170371
Download: ML20003E844 (2)
v • d • e


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Metropolitan Edison Company Post Office Box 480 Middletown, Pennsytvania 17057 Writer's Direct Dial Number April 9, 1981 LL2-81-0090 g

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TMI Program Office Ez Attn:

Mr. Lake Barrett, Deputy Director M

U. S. Nuclear Regulatory Commission g

gf c/o Three Mile Island Nuclear Station p=

y Middletown, Pennsylvania 17057 o

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Dear Sir:

Three Mile Island Nuclear Station, Unit 2 (TMI-2)

Operating License No. DPR-73 Docket No. 50-320 Groundwater Monitoring Program The following groundwater monitoring data are attached:

1.

Computer tables (Tables 1 and 2) of all tritium data-up to and including February 11, 1981.

2.

Computer tables (Tables 3 and 4) of gamma scan data up to and including March 11, 1981.

3.

Individual computer graphs of tritium concentration for each monitoring station.

4.

A graph showing the gamma scan results from Monitoring Station MW-2.

5.

A composite drawing showing all monitoring station locations with a graph of the tritium concentration for each station.

Groundwater level data and precipitation data are being prepared in computer storage so that computer tables and graphs of this date can be supplied in future reports.

There was no substantial changes in the tritium concentrations over the reporting period, as is shown on the composite drawing. As shown

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'on the gamma scan graph for Monitoring Station MW-2, the Cs-134/137 levels have substantially dropped below the peak recorded on 9y February 11, 1981.

\\\\ p In order to reduce the sediment load in samples from pumped monitoring stations and to establish a uniform sampling technique, we plan to g 4 Y

sample all monitoring stations by the bailing technique.

81041703%

pt 7

Metropoi. tan Ec son Comcany is a Memoer of tna Genera! Puche utmt.es System

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Mr. Lake Barrett LL2-81-0090 Also, in order to consolidate our efforts in the broad area of containment building leak detection, we plan to incorporate the Groundwater Monitoring Program into a newly formed Containment Integrity Assessment Program.

Sincerely, t

AK,4="c l

G. K. Hovey Vice-President and Director, TMI-2 GKH:JJB:djb Attachments cc:

Dr. B. J. Snyder, Program Director-TMI Office I

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n.u. 1 s

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a a

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a a

a a

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a a

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a a

a a

8 a

a a

a 3

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13.4 E.3 a a

a a

a a

s a

a a

a a

a a

e a

a 3

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34.9 4.3 a a

s a

a a

s a

a a

a s'

s s

a a

a i

October 15,190es s

a a

a 14.3 2.as a

s i

a a

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s howeeber 18,1980s s

94.7 S.5 a a

a a

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a a

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5.9 2.3Gs a

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a a

a a

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3s.3 4.3 m a

a a

a a

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a a

a a

a s

a a

a a

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33.1 3.5 a a

a a

a a

s a

s e

a a

a a

a a

e a December 24,19ses a

24.1 59a s

a a

a a

a a

a a

a a

a a

a a

a Jennerg 7,19sts s

15.9 5.9 a a

a a

a 3

a e

a a

a a

a a

3 s

a Jameerg 14,1981 a

51.4 7.3 s s

a s

a s

a e

s 8

a a

a a

a a

a s

January 21,1981s a

13.7 4.5 a a

s a

a a

a Q

a a

a a

a a

a a

a a

i s

Jannerg 2s,19013 s

7.7 4.36s s

a a

a 8

a Q

a a

3 a

a a

a a

a a

i a Februarg 4.1981s a

12.7 3.5 s a

a a

s s

s a

a 3

a a

a 3

3

Febreorg 11.1981s a 371 37 s

s a

a a

a s

a a

a a

a a

a s

a a February 18,1981s 3 189 15.9 8 3

a a

3 a

a a

a a

a

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a a

a i

s Februarg 35,1981s a

54.4 5.8 s a

e a

a a

a j

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a a

a a

a 1g9sts 19.5 4.5 s a

a a

a g -

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Table 4 t

a sassss sssa kss ssss ss ssss s ss sssssss s s s s s s s sss ss s ss s s s ss sss s s sssss ss ssss s ss s s s s s a ts s s ss s s s s s ss s sss ss ssss sssss ssssssssssssssatsas s

REPORT is0. 15 DaTgs persh Is, 1981

# 9 a

s

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g PACC 1 0F 1 a

4 a

Pu EnutsonMNTAL CONTs0LS OROUP 3

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n.u. t a n.v. 2 s

M.u. 3 s n.u. 4 s n.u. 5 a n.u. s a n.u. 7 e n.w. s a

[

s as ss s s ss ss s ss sssssss sss s s ssss ss ss s s s s s ss ss s s s s s s s s s s s ssss s s s sss s s s s sss s s ss s s ss ss ss ss s ss ss ss s s ss s ssss ssss s s sssas tsas s a ss assse s i

a or sanPLE s CS-234

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+#-s Cs-134

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+/-s CS-134 +/ s CS-134 e/-s i

l

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i a

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13.0 5.5 s s

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s e

a s

s s

a a

a s

a Hovember it,1980s 33 E.9 s a

a a

a a

s a

a a

a a

s a

s i

a Deceeber 18,1980s 12.9 s.3 a a

a a

a s

a a

a a

a a

a a

a a

a Decueber 17,19ses 35 4.3 s a

a a

s s

a a

a a

s a

a s

}

s December 24,19ses a

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a a

a a

s a

a a

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Jeaverg 14,1981 36 6 5

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7.71 3.63s a

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1 Febewery 4.19813 a

6.3 3.51s a

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APR 44y JUn JUL AUg SEP NOV DEC jay FEg MAR

=====r 1980 198g C"sD

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Metropolitan Edison Company Post Office Box 480 ll Middletown, Pennsylvania 17057 Writer's Sirect Dial Nurnber April 9, 1981 LL2-81-0090 g

m CE E

F 5

Dh TMI Program Office Em

'd Attn:

Mr. Lake Barrett, Deputy Director

$5 Middletown, Pennsylvania 17057 y%{=

C U. S. Nuclear Regulatory Commission gg c/o Three Mile Island Nuclear Station c)

E C'

Dear Sir:

Three Mile Island Nuclear Station, Unit 2 (IMI-2)

Operating License No. DPR-73 Docket No. 50-320 Groundwater Monitoring Program The following groundwater monitoring data are attached:

1.

Computer tables (Tables 1 and 2) of all tritium data up to and including February 11, 1981.

2.

Computer tables (Tables 3 and 4) of gamma scan data up to and including March 11, 1981.

3.

Individual computer graphs of tritium concentration for each monitoring station.

4.

A graph showing the gamma scan results from Monitoring Station MW-2.

5.

A composite drawing showing all monitoring station locations with a graph of the tritium concentration for each station.

Groundwater level data and precipitation data are being prepared in computer storage so that computer tables and graphs of this date can be supplied in future reports.

'There was no substantial changes in the tritium concentrations over the reporting period, as is shown on the composite drawing. As shown

'on the gamma scan graph for Monitoring Station MW-2, the Cs-134/137 levels have substantially dropped below the peak recorded on February ll, 1981.

In order to reduce the sediment load in samples from pumped monitoring stations and to establish a uniform sampling technique, we plan to sample all monitoring stations by the bailing technique.

Metrocontan Ec: son Comca w :s a Memter of the General Puchc U!1t es System

1 M;. Lake Barrett LL2-81-0090 Also, in order to consolidate our efforts in the broad area of containment building leak detection, we plan to incorporate the Groundwater. Monitoring Program into a newly formed Containment Integrity Assessment Program.

Sincerely,

// M (.

(T*

G. K. Hovey Vice-President and Director, THI-2 GKH:JJB:djb Attachments cc:

Dr. B. J. Snyder, Program Efrector-TMI Office i

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