ML20136D484
| ML20136D484 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 01/03/1986 |
| From: | Standerfer F GENERAL PUBLIC UTILITIES CORP. |
| To: | Travers W Office of Nuclear Reactor Regulation |
| References | |
| 0375A, 375A, 4410-85-L-0250, 4410-85-L-250, 441Q-85-L-250, 850103, 850130, 851030, 860103, NUDOCS 8601060182 | |
| Download: ML20136D484 (40) | |
Text
GPU Nuclear Corporation Nuclear
- ,ome =8o s
Middletown, Pennsylvania 17057-0191 717 944 7621 TELEX 84-2386 Writer's Direct Dial Number:
(717) 948-8461 4410-85-L-0250 Document ID 0375A January 3, 1986 L,
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TMI-2 Cleanup Project Directorate 25 Attn: Dr. W. D. Travers
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Director US Nuclear Regulatory Commission
=
c/o Three Mile Island Nuclear Station u
Middletown, PA 17057 O
Dear Dr. Travers:
Three Mile Island Nuclear Station, Unit 2 (TMI-2)
Operating License No. DPR-73 Docket No. 50-320 Groundwater Monitoring The following is a periodic report of the results of the groundwater monitoring program which is conducted to detect the leakage of radioactive water to the groundwater in the vicinity of TMI-2.
GROUNDWATER MONITORING The following groundwater monitoring data is attached:
1.
Individual computer graphs (Figure 1) of tritium concentrations for monitoring stations, observation stations, and the East Dike Catch Basin (EDCB) up to and including September 3, 1985 2.
Individual computer graphs (Figure 2) of the water levels within the monitoring stations.
3.
A graph (Figure 3) indicating the gamma scan data from monitoring station MS-2 sample analyses up to and including S
0n September 5, 1985.
9 1 \\
$$O N1 K go R
GPU Nuclear Corporation is a subsidiary of the General Public Utilities Corporation
Dr. Travers January 3, 1986 4410-85-L-0250 4.
A composite drawing which depicts all monitoring locations with a corresponding graph of the tritium concentrations reported for each station.
5.
A table of tritium concentrations from weekly sampling of stations OS-16, OS-17, and MS-2 for the period of April 2, 1985, to October 8, 1985 Collection of groundwater samples from all the monitoring and observation stations occurs monthly. Weekly collection and analysis of samples from OS-16, 0S-17 and MS-2 began in April 1985 to monitor for tritium activity due to a previous TMI-2 Borated Water Storage Tank (BWST) valve leak.
Tritium concentrations in the monitoring and observation stations remained fairly constant during the reporting period. The results for the reporting period showed normal environmental background tritium concentrations (between 150 and 300 pCi/1) in MS-1, 5, 6, 7, 8 and the EDCB samples. Above background tritium concentrations reported in MS-2, 3, 4, 0S-10, 13, 14, 16, and 17 all were within the range of concentrations recorded since 1980.
The Groundwater Monitoring Report of June 19, 1985, reported that a slight increase in the tritium concentrations of stations OS-16, OS-17, and MS-2 had occurred due to a TMI-2 BWST valve leak. The leak was traced to valve DH-V134A which is located on a common line from the GWST and the Sodium Hydroxide Tank. Repair of the leaking valve was performed under Unit Work Instruction No. 4220-3212-85-E977.
The gamma results for the reporting period show only naturally-occurring K-40 present in OS-13B, OS-16, and OS-17. Concentrations in 0S-138 ranged from 58.2 to 77.9 pCi/1; OS-16 concentrations ranged from 52.3 to 577 pC1/1; and 0S-17 concentrations varied between 98.6 and 182 pCi/1.
Sediment present in the groundwater samples resulted in the detection of K-40.
All other radionuclide concentrations were reported as less than the lower limit of detection (LLD) for the reporting period.
Sr-89 and Sr-90 results for the second quarter of 1985 were LLD for all samples.
Based on the data collected and analyzed to date, no significant radiological safety or health concerns exist relative to the groundwater in the vicinity of TMI-7. at this time.
^
Sincerely,
\\
mU z.
sw s
F. R. Standerfer Vice President / Director, TMI-2 Attachments
ATTACHENT (4410-85-L-0250)
LIST OF ATTACHMENTS Figure 1 Graphs of Tritium Concentrations of Monitoring Stations and East Dike Catch Basin (EDCB) Samples Versus Time (15 Pages)
Figure 2 Graphs of Water Levels in Monitoring Stations Versus Time (15 Pages)
Figure 3 Gamma Scan Results for Monitoring Station MS-2 Versus Time (5 Pages)'
Drawing 1 Groundwater Tritium Concentrations at Site Liquid Monitoring Systems Table 1 Tritium Concentration from Weekly Sample of Monitoring Stations OS-17, OS-16, and MS-2 for the period of April 2, 1985, to October 8, 1985 e
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I TABLE 1 Page 1 o f 1 Tritium Concentrations (pCi/1)
. M7E I
M2 I
IB16 i
N17 I
i W
l l
I I
telFLE I WLIE
+/-
I WLE
+/-
1 UGLE
+/-
I l-l-
1 I
4/2/5 I (4100 1
M i
22000 2000 1
4/9/M i M
i M
i 36000 2900 1
4/15/85 I (5300 1
(13000 1
30000 3300 1
4/23/5 I (4400 1
14000 2400 1
21000 2600 1
4/30/5 1 4000 1900 1
15000 2400 1
190Q0 2600 1
5/7/N I (8100 i
M i
IM00 1700 1
5/14/85 1 2900 490 1
0100 620 1
19000 940 I
5/22/85 1 1300 420 l
11000 430 1
14000 7H I
5/20/85 1 2000 4H I
15000 M0 1
17000 090 I
6/4/5 1 3000 440 1
19000 N0 1
11000 650 l
l 6/11/05 1 1400 4H I
14000 750 1
13000 710 1
6/10/85 I ilD0 430 1
13000 710 1
3300 H0 1
6/25/05 1 2200 400 1
14000 740 1
15000 770 1
7/2/05 1 2000 430 i
M i
H00 430 1
7/9/05 1 3400 470 1
13000 690 1
8200 390 1
7/16/95 1 3400 500 l
15000 7H I
9200 H3 1
7/23/05 I 3300 490 1
16000 Sie 1
9900 660 1
7/30/05 1 1000 540 1
17000 900 1
13000 050 i
B/6/I5 1 2l00 440 1
11000 400 1
11000 670 1
I/13/95 I iMO 430 1
6900 30 1
11000
- 0 I
I/20/05 1 2000 350 1
7200 570 i
N00
- 0 l
I/27/05 1 1300 470 l
1500 420 1
6700 670 1
9/3/05 1 3400 510 1
M I
N00 500 1
9/1C/85 1 2300 400 1
12000 720 1
8300 H0 1
9/17/05 1 3700 500 1
7200 30 I
9500 H0 1
9/24/05 1 4000 490 1
9500 430 I
8000
- 0 1
10/1/85 1 770 430 I
H00 SH I
OHO 400 1
10/1/05 1 2700 4H I
N00 530 1
8700 610 I
NA - sample not available.
1 4
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